freeCodeCamp/match-non-whitespace-characters.english.md at 5feabd762cdc33cd06c6d3f4238f68b0c2d714ad

Randell Dawson 3ec1fe8ea7 feat: add forumTopicId to challenge frontmatter [pre-existing]

This commit adds the pre-existing challenge guide topics in the
forum to the forntmatter of their challenge markdown files.

2019-08-05 22:14:37 +05:30

2.3 KiB

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id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
587d7db9367417b2b2512ba4	Match Non-Whitespace Characters	1	18210

Description

You learned about searching for whitespace using \s, with a lowercase s. You can also search for everything except whitespace. Search for non-whitespace using \S, which is an uppercase s. This pattern will not match whitespace, carriage return, tab, form feed, and new line characters. You can think of it being similar to the character class [^ \r\t\f\n\v].

let whiteSpace = "Whitespace. Whitespace everywhere!"
let nonSpaceRegex = /\S/g;
whiteSpace.match(nonSpaceRegex).length; // Returns 32

Instructions

Change the regex countNonWhiteSpace to look for multiple non-whitespace characters in a string.

Tests

tests:
  - text: Your regex should use the global flag.
    testString: assert(countNonWhiteSpace.global);
  - text: Your regex should use the shorthand character <code>\S/code> to match all non-whitespace characters.
    testString: assert(/\\S/.test(countNonWhiteSpace.source));
  - text: Your regex should find 35 non-spaces in <code>"Men are from Mars and women are from Venus."</code>
    testString: assert("Men are from Mars and women are from Venus.".match(countNonWhiteSpace).length == 35);
  - text: 'Your regex should find 23 non-spaces in <code>"Space: the final frontier."</code>'
    testString: 'assert("Space: the final frontier.".match(countNonWhiteSpace).length == 23);'
  - text: Your regex should find 21 non-spaces in <code>"MindYourPersonalSpace"</code>
    testString: assert("MindYourPersonalSpace".match(countNonWhiteSpace).length == 21);

Challenge Seed

let sample = "Whitespace is important in separating words";
let countNonWhiteSpace = /change/; // Change this line
let result = sample.match(countNonWhiteSpace);

Solution

let sample = "Whitespace is important in separating words";
let countNonWhiteSpace = /\S/g; // Change this line
let result = sample.match(countNonWhiteSpace);

2.3 KiB Raw Blame History