Corrections from Live Stream
This commit is contained in:
SaintPeter
@ -87,7 +87,7 @@
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"id": "56533eb9ac21ba0edf2244a8",
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"title": "Storing Values with the Equal Operator",
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"description": [
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"In Javascript, you can store a value in a variable with the <code>=</code> or <dfn>assignment<dfn> operator.",
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"In Javascript, you can store a value in a variable with the <dfn>assignment</dfn> or <code>equal</code> (<code>=</code>) operator.",
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"<code>myVariable = 5;</code>",
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"Assigns the <code>Number</code> value <code>5</code> to <code>myVariable</code>.",
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"Assignment always goes from right to left. Everything to the right of the <code>=</code> operator is resolved before the value is assigned to the variable to the left of the operator.",
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@ -225,7 +225,7 @@
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"<strong>Examples:</strong>",
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"<blockquote>var someVariable;<br>var anotherVariableName;<br>var thisVariableNameIsTooLong;</blockquote>",
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"<h4>Instructions</h4>",
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"Correct the variable assignements so their names match their variable declarations above."
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"Correct the variable assignments so their names match their variable declarations above."
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],
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"releasedOn": "11/27/2015",
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"tests": [
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@ -272,7 +272,7 @@
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"JavaScript uses the <code>+</code> symbol as addition operation when placed between two numbers.",
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"",
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"<strong>Example</strong>",
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"<blockquote>5 + 10 = 15</blockquote>",
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"<blockquote>myVar = 5 + 10; // assigned 15</blockquote>",
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"",
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"<h4>Instructions</h4>",
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"Change the <code>0</code> so that sum will equal <code>20</code>."
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@ -299,10 +299,10 @@
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"JavaScript uses the <code>-</code> symbol for subtraction.",
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"",
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"<strong>Example</strong>",
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"<blockquote>12 - 6 = 6</blockquote>",
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"<blockquote>myVAr = 12 - 6; // assigned 6</blockquote>",
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"",
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"<h4>Instructions</h4>",
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"Change the <code>0</code> so that difference will equal <code>12</code>."
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"Change the <code>0</code> so the difference is <code>12</code>."
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],
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"tests": [
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"assert(difference === 12, 'message: Make the variable <code>difference</code> equal 12.');",
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@ -330,7 +330,7 @@
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"JavaScript uses the <code>*</code> symbol for multiplication of two numbers.",
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"",
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"<strong>Example</strong>",
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"<blockquote>13 * 13 = 169</blockquote>",
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"<blockquote>myVar = 13 * 13; // assigned 169</blockquote>",
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"",
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"<h4>Instructions</h4>",
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"Change the <code>0</code> so that product will equal <code>80</code>."
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@ -361,10 +361,10 @@
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"JavaScript uses the <code>/</code> symbol for division.",
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"",
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"<strong>Example</strong>",
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"<blockquote>16 / 2 = 8</blockquote>",
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"<blockquote>myVar = 16 / 2; // assigned 8</blockquote>",
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"",
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"<h4>Instructions</h4>",
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"Change the <code>0</code> so that <code>quotient</code> will equal to <code>2</code>."
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"Change the <code>0</code> so that the <code>quotient</code> is equal to <code>2</code>."
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],
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"tests": [
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"assert(quotient === 2, 'message: Make the variable <code>quotient</code> equal to 2.');",
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@ -387,7 +387,7 @@
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"description": [
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"You can easily <dfn>increment</dfn> or add one to a variable with the <code>++</code> operator.",
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"<code>i++;</code>",
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"is the equivilent of",
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"is the equivalent of",
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"<code>i = i + 1;</code>",
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"<h4>Instructions</h4>",
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"Change the code to use the <code>++</code> operator on <code>myVar</code>"
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@ -426,7 +426,7 @@
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"description": [
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"You can easily <dfn>decrement</dfn> or decrease a variable by one with the <code>--</code> operator.",
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"<code>i--;</code>",
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"is the equivilent of",
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"is the equivalent of",
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"<code>i = i - 1;</code>",
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"<h4>Instructions</h4>",
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"Change the code to use the <code>--</code> operator on <code>myVar</code>"
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@ -466,8 +466,8 @@
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"We can store decimal numbers in variables too. Decimal numbers are sometimes refered to as <dfn>floating point</dfn> numbers or <dfn>floats</dfn>. ",
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"<strong>Note</strong>",
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"Not all real numbers can accurately be represented in <dfn>floating point</dfn>. This can lead to rounding errors. <a href=\"https://en.wikipedia.org/wiki/Floating_point#Accuracy_problems\" target=\"_blank\">Details Here</a>.",
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"",
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"Let's create a variable <code>myDecimal</code> and give it a decimal value."
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"<h4>Instructions</h4>",
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"Create a variable <code>myDecimal</code> and give it a decimal value."
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],
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"tests": [
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"assert(typeof myDecimal === \"number\", 'message: <code>myDecimal</code> should be a number.');",
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@ -492,6 +492,7 @@
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"description": [
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"In JavaScript, you can also perform calculations with decimal numbers, just like whole numbers.",
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"Let's multiply two decimals together to get their product.",
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"<h4>Instructions</h4>",
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"Change the <code>0.0</code> so that product will equal <code>5.0</code>."
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],
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"tests": [
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@ -514,6 +515,7 @@
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"title": "Divide one Decimal by Another with JavaScript",
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"description": [
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"Now let's divide one decimal by another.",
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"<h4>Instructions</h4>",
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"Change the <code>0.0</code> so that <code>quotient</code> will equal to <code>2.2</code>."
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],
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"tests": [
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@ -533,16 +535,18 @@
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},
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{
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"id": "56533eb9ac21ba0edf2244ae",
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"title": "Find a Remainder with Modulus",
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"title": "Finding a Remainder in Javascript",
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"description": [
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"The modulus operator <code>%</code> gives the remainder of the division of two numbers.",
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"The <dfn>remainder</dfn> operator <code>%</code> gives the remainder of the division of two numbers. ",
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"<strong>Example</strong>",
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"<blockquote>5 % 2 = 1 because<br>Math.floor(5 / 2) = 2 (Quotient)<br>2 * 2 = 4<br>5 - 4 = 1 (Remainder)</blockquote>",
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"<strong>Usage</strong>",
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"In Maths, a number can be checked even or odd by checking the remainder of division of the number by <code>2</code>. ",
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"In mathematics, a number can be checked even or odd by checking the remainder of division of the number by <code>2</code>. ",
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"<blockquote>17 % 2 = 1 (17 is Odd)<br>48 % 2 = 0 (48 is Even)</blockquote>",
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"<strong>Note</strong>",
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"The <dfn>remainder</dfn> operator is sometimes incorrectly refered to as the \"modulus\" operator. It is very similar to modulus, but does not work properly with negative numbers.",
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"<h4>Instructions</h4>",
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"Set <code>remainder</code> equal to the remainder of <code>11</code> divided by <code>3</code> using the <dfn>modulus</dfn> operator."
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"Set <code>remainder</code> equal to the remainder of <code>11</code> divided by <code>3</code> using the <dfn>remainder</dfn> (<code>%</code>) operator."
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],
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"releasedOn": "11/27/2015",
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"tests": [
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@ -917,6 +921,9 @@
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"",
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""
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],
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"tail": [
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"(function() { return \"myStr = \" + myStr; })();"
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],
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"solutions": [
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"var myStr = '<a href=\"http://www.example.com\" target=\"_blank\">Link</a>';"
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],
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@ -1358,7 +1365,7 @@
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"releasedOn": "11/27/2015",
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"tests": [
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"assert(typeof wordBlanks(\"\",\"\",\"\",\"\") === 'string', 'message: <code>wordBlanks(\"\",\"\",\"\",\"\")</code> should return a string');",
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"assert(wordBlanks(\"\",\"\",\"\",\"\").length > 50, 'message: <code>wordBlanks(\"\",\"\",\"\",\"\")</code> should return at least 50 characters with empty inputs');",
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"assert(wordBlanks(\"\",\"\",\"\",\"\").length > 30, 'message: <code>wordBlanks(\"\",\"\",\"\",\"\")</code> should return at least 30 characters with empty inputs');",
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"assert(/dog/.test(test1) && /big/.test(test1) && /ran/.test(test1) && /quickly/.test(test1),'message: <code>wordBlanks(\"dog\", \"big\", \"ran\", \"quickly\")</code> should contain all of the passed words.');",
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"assert(/cat/.test(test2) && /little/.test(test2) && /hit/.test(test2) && /slowly/.test(test2),'message: <code>wordBlanks(\"cat\", \"little\", \"hit\", \"slowly\")</code> should contain all of the passed words.');"
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],
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@ -2820,78 +2827,6 @@
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"nameEs": "",
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"namePt": ""
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},
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{
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"id": "5664820f61c48e80c9fa476c",
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"title": "Golf Code",
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"description": [
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"In the game of golf each hole has a <dfn>par</dfn> for the average number of <dfn>strokes</dfn> needed to sink the ball. Depending on how far above or below <code>par</code> your <code>stokes</code> are, there is a different nickname.",
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"Your function will be passed a <code>par</code> and <code>strokes</code>. Return strings according to this table (based on order of priority - top (highest) to bottom (lowest)):",
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"<table class=\"table table-striped\"><thead><tr><th>Stokes</th><th>Return</th></tr></thead><tbody><tr><td>1</td><td>\"Hole-in-one!\"</td></tr><tr><td><= par - 2</td><td>\"Eagle\"</td></tr><tr><td>par - 1</td><td>\"Birdie\"</td></tr><tr><td>par</td><td>\"Par\"</td></tr><tr><td>par + 1</td><td>\"Bogey\"</td></tr><tr><td>par + 2</td><td>\"Double Bogey\"</td></tr><tr><td>>= par + 3</td><td>\"Go Home!\"</td></tr></tbody></table>",
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"<code>par</code> and <code>strokes</code> will always be numeric and positive."
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],
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"releasedOn": "11/27/2015",
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"tests": [
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"assert(golfScore(4, 1) === \"Hole-in-one!\", 'message: <code>golfScore(4, 1)</code> should return \"Hole-in-one!\"');",
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"assert(golfScore(4, 2) === \"Eagle\", 'message: <code>golfScore(4, 2)</code> should return \"Eagle\"');",
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"assert(golfScore(5, 2) === \"Eagle\", 'message: <code>golfScore(4, 2)</code> should return \"Eagle\"');",
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"assert(golfScore(4, 3) === \"Birdie\", 'message: <code>golfScore(4, 3)</code> should return \"Birdie\"');",
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"assert(golfScore(4, 4) === \"Par\", 'message: <code>golfScore(4, 4)</code> should return \"Par\"');",
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"assert(golfScore(1, 1) === \"Hole-in-one!\", 'message: <code>golfScore(1, 1)</code> should return \"Hole-in-one!\"');",
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"assert(golfScore(5, 5) === \"Par\", 'message: <code>golfScore(5, 5)</code> should return \"Par\"');",
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"assert(golfScore(4, 5) === \"Bogey\", 'message: <code>golfScore(4, 5)</code> should return \"Bogey\"');",
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"assert(golfScore(4, 6) === \"Double Bogey\", 'message: <code>golfScore(4, 6)</code> should return \"Double Bogey\"');",
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"assert(golfScore(4, 7) === \"Go Home!\", 'message: <code>golfScore(4, 7)</code> should return \"Go Home!\"');",
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"assert(golfScore(5, 9) === \"Go Home!\", 'message: <code>golfScore(5, 9)</code> should return \"Go Home!\"');"
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],
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"challengeSeed": [
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"function golfScore(par, strokes) {",
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" // Only change code below this line",
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" ",
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" ",
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" return \"Change Me\";",
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" // Only change code above this line",
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"}",
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"",
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"// Change these values to test",
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"golfScore(5, 4);"
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],
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"solutions": [
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"function golfScore(par, strokes) {",
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" if (strokes === 1) {",
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" return \"Hole-in-one!\";",
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" }",
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" ",
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" if (strokes <= par - 2) {",
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" return \"Eagle\";",
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" }",
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" ",
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" if (strokes === par - 1) {",
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" return \"Birdie\";",
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" }",
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" ",
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" if (strokes === par) {",
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" return \"Par\";",
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" }",
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" ",
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" if (strokes === par + 1) {",
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" return \"Bogey\";",
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" }",
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" ",
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" if(strokes === par + 2) {",
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" return \"Double Bogey\";",
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" }",
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" ",
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" return \"Go Home!\";",
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"}"
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],
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"type": "bonfire",
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"challengeType": "5",
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"nameCn": "",
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"nameFr": "",
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"nameRu": "",
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"nameEs": "",
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"namePt": ""
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},
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{
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"id": "56533eb9ac21ba0edf2244da",
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"title": "Introducing Else Statements",
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@ -3066,6 +3001,78 @@
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"nameEs": "",
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"namePt": ""
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},
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{
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"id": "5664820f61c48e80c9fa476c",
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"title": "Golf Code",
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"description": [
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"In the game of <a href=\"https://en.wikipedia.org/wiki/Golf\">golf</a> each hole has a <dfn>par</dfn> for the average number of <dfn>strokes</dfn> needed to sink the ball. Depending on how far above or below <code>par</code> your <code>strokes</code> are, there is a different nickname.",
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"Your function will be passed a <code>par</code> and <code>strokes</code>. Return strings according to this table (based on order of priority - top (highest) to bottom (lowest)):",
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"<table class=\"table table-striped\"><thead><tr><th>Strokes</th><th>Return</th></tr></thead><tbody><tr><td>1</td><td>\"Hole-in-one!\"</td></tr><tr><td><= par - 2</td><td>\"Eagle\"</td></tr><tr><td>par - 1</td><td>\"Birdie\"</td></tr><tr><td>par</td><td>\"Par\"</td></tr><tr><td>par + 1</td><td>\"Bogey\"</td></tr><tr><td>par + 2</td><td>\"Double Bogey\"</td></tr><tr><td>>= par + 3</td><td>\"Go Home!\"</td></tr></tbody></table>",
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"<code>par</code> and <code>strokes</code> will always be numeric and positive."
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],
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"releasedOn": "11/27/2015",
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"tests": [
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"assert(golfScore(4, 1) === \"Hole-in-one!\", 'message: <code>golfScore(4, 1)</code> should return \"Hole-in-one!\"');",
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"assert(golfScore(4, 2) === \"Eagle\", 'message: <code>golfScore(4, 2)</code> should return \"Eagle\"');",
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"assert(golfScore(5, 2) === \"Eagle\", 'message: <code>golfScore(5, 2)</code> should return \"Eagle\"');",
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"assert(golfScore(4, 3) === \"Birdie\", 'message: <code>golfScore(4, 3)</code> should return \"Birdie\"');",
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"assert(golfScore(4, 4) === \"Par\", 'message: <code>golfScore(4, 4)</code> should return \"Par\"');",
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"assert(golfScore(1, 1) === \"Hole-in-one!\", 'message: <code>golfScore(1, 1)</code> should return \"Hole-in-one!\"');",
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"assert(golfScore(5, 5) === \"Par\", 'message: <code>golfScore(5, 5)</code> should return \"Par\"');",
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"assert(golfScore(4, 5) === \"Bogey\", 'message: <code>golfScore(4, 5)</code> should return \"Bogey\"');",
|
||||
"assert(golfScore(4, 6) === \"Double Bogey\", 'message: <code>golfScore(4, 6)</code> should return \"Double Bogey\"');",
|
||||
"assert(golfScore(4, 7) === \"Go Home!\", 'message: <code>golfScore(4, 7)</code> should return \"Go Home!\"');",
|
||||
"assert(golfScore(5, 9) === \"Go Home!\", 'message: <code>golfScore(5, 9)</code> should return \"Go Home!\"');"
|
||||
],
|
||||
"challengeSeed": [
|
||||
"function golfScore(par, strokes) {",
|
||||
" // Only change code below this line",
|
||||
" ",
|
||||
" ",
|
||||
" return \"Change Me\";",
|
||||
" // Only change code above this line",
|
||||
"}",
|
||||
"",
|
||||
"// Change these values to test",
|
||||
"golfScore(5, 4);"
|
||||
],
|
||||
"solutions": [
|
||||
"function golfScore(par, strokes) {",
|
||||
" if (strokes === 1) {",
|
||||
" return \"Hole-in-one!\";",
|
||||
" }",
|
||||
" ",
|
||||
" if (strokes <= par - 2) {",
|
||||
" return \"Eagle\";",
|
||||
" }",
|
||||
" ",
|
||||
" if (strokes === par - 1) {",
|
||||
" return \"Birdie\";",
|
||||
" }",
|
||||
" ",
|
||||
" if (strokes === par) {",
|
||||
" return \"Par\";",
|
||||
" }",
|
||||
" ",
|
||||
" if (strokes === par + 1) {",
|
||||
" return \"Bogey\";",
|
||||
" }",
|
||||
" ",
|
||||
" if(strokes === par + 2) {",
|
||||
" return \"Double Bogey\";",
|
||||
" }",
|
||||
" ",
|
||||
" return \"Go Home!\";",
|
||||
"}"
|
||||
],
|
||||
"type": "bonfire",
|
||||
"challengeType": "5",
|
||||
"nameCn": "",
|
||||
"nameFr": "",
|
||||
"nameRu": "",
|
||||
"nameEs": "",
|
||||
"namePt": ""
|
||||
},
|
||||
{
|
||||
"id": "56533eb9ac21ba0edf2244dd",
|
||||
"title": "Selecting from many options with Switch Statements",
|
||||
@ -3450,7 +3457,7 @@
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||||
"In the casino game Blackjack, a player can gain an advantage over the house by keeping track of the relative number of high and low cards remaining in the deck. This is called <a href=\"https://en.wikipedia.org/wiki/Card_counting\">Card Counting</a>. ",
|
||||
"Having more high cards remaining in the deck favors the player. Each card is assigned a value according to the table below. When the count is positive, the player should bet high. When the count is zero or negative, the player should bet low.",
|
||||
"<table class=\"table table-striped\"><thead><tr><th>Value</th><th>Cards</th></tr></thead><tbody><tr><td>+1</td><td>2, 3, 4, 5, 6</td></tr><tr><td>0</td><td>7, 8, 9</td></tr><tr><td>-1</td><td>10, 'J', 'Q', 'K','A'</td></tr></tbody></table>",
|
||||
"You will write a card counting function. It will recieve a <code>card</code> parameter and increment or decrement the global <code>count</code> variable according to the card's value (see table). The function will then return the current count and the string <code>\"Bet\"</code> if the count if positive, or <code>\"Hold\"</code> if the count is zero or negative.",
|
||||
"You will write a card counting function. It will receive a <code>card</code> parameter and increment or decrement the global <code>count</code> variable according to the card's value (see table). The function will then return the current count and the string <code>\"Bet\"</code> if the count if positive, or <code>\"Hold\"</code> if the count is zero or negative.",
|
||||
"<strong>Example Output</strong>",
|
||||
"<code>-3 Hold</code><br><code>5 Bet</code>"
|
||||
],
|
||||
@ -4017,7 +4024,7 @@
|
||||
"JavaScript Object Notation or <code>JSON</code> uses the format of Javascript Objects to store data. JSON is flexible becuase it allows for data structures with arbitrary combinations of <dfn>strings</dfn>, <dfn>numbers</dfn>, <dfn>booleans</dfn>, <dfn>arrays</dfn>, and <dfn>objects</dfn>. ",
|
||||
"Here is an example of a JSON object:",
|
||||
"<blockquote>var ourMusic = [<br> {<br> \"artist\": \"Daft Punk\",<br> \"title\": \"Homework\",<br> \"release_year\": 1997,<br> \"formats\": [ <br> \"CD\", <br> \"Cassette\", <br> \"LP\" ],<br> \"gold\": true<br> }<br>];</blockquote>",
|
||||
"This is an array of objects and the object has various peices of <dfn>metadata</dfn> about an album. It also has a nested array of formats. Additional album records could be added to the top level array.",
|
||||
"This is an array of objects and the object has various pieces of <dfn>metadata</dfn> about an album. It also has a nested array of formats. Additional album records could be added to the top level array.",
|
||||
"<h4>Instructions</h4>",
|
||||
"Add a new album to the <code>myMusic</code> JSON object. Add <code>artist</code> and <code>title</code> strings, <code>release_year</code> year, and a <code>formats</code> array of strings."
|
||||
],
|
||||
@ -4234,7 +4241,7 @@
|
||||
"id": "56533eb9ac21ba0edf2244cf",
|
||||
"title": "Record Collection",
|
||||
"description": [
|
||||
"You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unqiue id number and which has several properties. Not all albums have complete information.",
|
||||
"You are given a JSON object representing (a small part of) your record collection. Each album is identified by a unique id number and which has several properties. Not all albums have complete information.",
|
||||
"Write a function which takes an <code>id</code>, a property (<code>prop</code>), and a <code>value</code>.",
|
||||
"For the given <code>id</code> in <code>collection</code>:",
|
||||
"If <code>value</code> is non-blank (<code>value !== \"\"</code>), then update or set the <code>value</code> for the <code>prop</code>.",
|
||||
@ -4250,6 +4257,7 @@
|
||||
"update(2548, \"tracks\", \"\"); assert(!collection[2548].hasOwnProperty(\"tracks\"), 'message: After <code>update(2548, \"tracks\", \"\")</code>, <code>tracks</code> should not be set');"
|
||||
],
|
||||
"challengeSeed": [
|
||||
"// Setup",
|
||||
"var collection = {",
|
||||
" 2548: {",
|
||||
" album: \"Slippery When Wet\",",
|
||||
|
||||
Reference in New Issue
Block a user