ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
129 lines
2.2 KiB
Markdown
129 lines
2.2 KiB
Markdown
---
|
|
id: 56533eb9ac21ba0edf2244de
|
|
title: Adding a Default Option in Switch Statements
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/c3JvVfg'
|
|
forumTopicId: 16653
|
|
dashedName: adding-a-default-option-in-switch-statements
|
|
---
|
|
|
|
# --description--
|
|
|
|
In a `switch` statement you may not be able to specify all possible values as `case` statements. Instead, you can add the `default` statement which will be executed if no matching `case` statements are found. Think of it like the final `else` statement in an `if/else` chain.
|
|
|
|
A `default` statement should be the last case.
|
|
|
|
```js
|
|
switch (num) {
|
|
case value1:
|
|
statement1;
|
|
break;
|
|
case value2:
|
|
statement2;
|
|
break;
|
|
...
|
|
default:
|
|
defaultStatement;
|
|
break;
|
|
}
|
|
```
|
|
|
|
# --instructions--
|
|
|
|
Write a switch statement to set `answer` for the following conditions:
|
|
`"a"` - "apple"
|
|
`"b"` - "bird"
|
|
`"c"` - "cat"
|
|
`default` - "stuff"
|
|
|
|
# --hints--
|
|
|
|
`switchOfStuff("a")` should have a value of "apple"
|
|
|
|
```js
|
|
assert(switchOfStuff('a') === 'apple');
|
|
```
|
|
|
|
`switchOfStuff("b")` should have a value of "bird"
|
|
|
|
```js
|
|
assert(switchOfStuff('b') === 'bird');
|
|
```
|
|
|
|
`switchOfStuff("c")` should have a value of "cat"
|
|
|
|
```js
|
|
assert(switchOfStuff('c') === 'cat');
|
|
```
|
|
|
|
`switchOfStuff("d")` should have a value of "stuff"
|
|
|
|
```js
|
|
assert(switchOfStuff('d') === 'stuff');
|
|
```
|
|
|
|
`switchOfStuff(4)` should have a value of "stuff"
|
|
|
|
```js
|
|
assert(switchOfStuff(4) === 'stuff');
|
|
```
|
|
|
|
You should not use any `if` or `else` statements
|
|
|
|
```js
|
|
assert(!/else/g.test(code) || !/if/g.test(code));
|
|
```
|
|
|
|
You should use a `default` statement
|
|
|
|
```js
|
|
assert(switchOfStuff('string-to-trigger-default-case') === 'stuff');
|
|
```
|
|
|
|
You should have at least 3 `break` statements
|
|
|
|
```js
|
|
assert(code.match(/break/g).length > 2);
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
function switchOfStuff(val) {
|
|
var answer = "";
|
|
// Only change code below this line
|
|
|
|
|
|
|
|
// Only change code above this line
|
|
return answer;
|
|
}
|
|
|
|
switchOfStuff(1);
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
function switchOfStuff(val) {
|
|
var answer = "";
|
|
|
|
switch(val) {
|
|
case "a":
|
|
answer = "apple";
|
|
break;
|
|
case "b":
|
|
answer = "bird";
|
|
break;
|
|
case "c":
|
|
answer = "cat";
|
|
break;
|
|
default:
|
|
answer = "stuff";
|
|
}
|
|
return answer;
|
|
}
|
|
```
|