freeCodeCamp/match-non-whitespace-characters.md at 4a74567986d8de748f954e8957adc7613e85193f

Oliver Eyton-Williams 4a74567986 fix: remove title from Chinese chals

2020-10-06 23:10:08 +05:30

2.3 KiB

Raw Blame History

id, challengeType, forumTopicId, localeTitle

id	challengeType	forumTopicId	localeTitle
587d7db9367417b2b2512ba4	1	18210	匹配非空白字符

Description

已经学会了如何使用带有小写s的缩写\s来搜寻空白字符。还可以搜寻除了空格之外的所有内容。使用\S搜寻非空白字符，其中S是大写。此匹配模式将不匹配空格、回车符、制表符、换页符和换行符。可以认为这类似于元字符[^\r\t\f\n\v]。

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

Instructions

修改正则表达式countNonWhiteSpace以查找字符串中的多个非空字符。

Tests

tests:
  - text: 你的正则表达式应该使用全局状态修正符。
    testString: assert(countNonWhiteSpace.global);
  - text: 正则表达式应该使用元字符 <code>\S/code> 来匹配所有的非空格字符。
    testString: assert(/\\S/.test(countNonWhiteSpace.source));
  - text: "你的正则表达式应该在<code>'Men are from Mars and women are from Venus.'</code>中匹配到 35 个非空白字符。"
    testString: assert("Men are from Mars and women are from Venus.".match(countNonWhiteSpace).length == 35);
  - text: '你的正则表达式应该在<code>"Space: the final frontier."</code>中匹配到 23 个非空白字符。'
    testString: 'assert("Space: the final frontier.".match(countNonWhiteSpace).length == 23);'
  - text: "你的正则表达式应该在<code>'MindYourPersonalSpace'</code>中匹配到 21 个非空白字符。"
    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