freeCodeCamp/specify-upper-and-lower-number-of-matches.english.md at 21f5427c145e065e39da104cfbd9472d659501f2

Valeriy 79d9012432 fix(curriculum): quotes in tests (#18828 )

* fix(curriculum): tests quotes

* fix(curriculum): fill seed-teardown

* fix(curriculum): fix tests and remove unneeded seed-teardown

2018-10-20 23:32:47 +05:30

2.6 KiB

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id, title, challengeType

id	title	challengeType
587d7db9367417b2b2512ba5	Specify Upper and Lower Number of Matches	1

Description

Recall that you use the plus sign + to look for one or more characters and the asterisk * to look for zero or more characters. These are convenient but sometimes you want to match a certain range of patterns. You can specify the lower and upper number of patterns with quantity specifiers. Quantity specifiers are used with curly brackets ({ and }). You put two numbers between the curly brackets - for the lower and upper number of patterns. For example, to match only the letter a appearing between 3 and 5 times in the string "ah", your regex would be /a{3,5}h/.

let A4 = "aaaah";
let A2 = "aah";
let multipleA = /a{3,5}h/;
multipleA.test(A4); // Returns true
multipleA.test(A2); // Returns false

Instructions

Change the regex ohRegex to match only 3 to 6 letter h's in the word "Oh no".

Tests

tests:
  - text: Your regex should use curly brackets.
    testString: assert(ohRegex.source.match(/{.*?}/).length > 0, 'Your regex should use curly brackets.');
  - text: Your regex should not match <code>"Ohh no"</code>
    testString: assert(!ohRegex.test("Ohh no"), 'Your regex should not match <code>"Ohh no"</code>');
  - text: Your regex should match <code>"Ohhh no"</code>
    testString: assert(ohRegex.test("Ohhh no"), 'Your regex should match <code>"Ohhh no"</code>');
  - text: Your regex should match <code>"Ohhhh no"</code>
    testString: assert(ohRegex.test("Ohhhh no"), 'Your regex should match <code>"Ohhhh no"</code>');
  - text: Your regex should match <code>"Ohhhhh no"</code>
    testString: assert(ohRegex.test("Ohhhhh no"), 'Your regex should match <code>"Ohhhhh no"</code>');
  - text: Your regex should match <code>"Ohhhhhh no"</code>
    testString: assert(ohRegex.test("Ohhhhhh no"), 'Your regex should match <code>"Ohhhhhh no"</code>');
  - text: Your regex should not match <code>"Ohhhhhhh no"</code>
    testString: assert(!ohRegex.test("Ohhhhhhh no"), 'Your regex should not match <code>"Ohhhhhhh no"</code>');

Challenge Seed

let ohStr = "Ohhh no";
let ohRegex = /change/; // Change this line
let result = ohRegex.test(ohStr);

Solution

// solution required

2.6 KiB Raw Blame History