3.3 KiB
3.3 KiB
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
587d7db8367417b2b2512ba0 | Match Everything But Letters and Numbers | 1 | 匹配一切,但字母和数字 |
Description
\w
字母数字[A-Za-z0-9_]
。您可能想要搜索的自然模式与字母数字相反。您可以使用\W
搜索\w
的反面。注意,相反的模式使用大写字母。此快捷方式与[^A-Za-z0-9_]
。 让shortHand = / \ W /;
让数字=“42%”;
let sentence =“Coding!”;
numbers.match(简写); //返回[“%”]
sentence.match(简写); //返回[“!”]
Instructions
\W
来计算各种引号和字符串中的非字母数字字符数。 Tests
tests:
- text: 你的正则表达式应该使用全局标志。
testString: 'assert(nonAlphabetRegex.global, "Your regex should use the global flag.");'
- text: 你的正则表达式应该在<code>"The five boxing wizards jump quickly."</code>找到6个非字母数字字符<code>"The five boxing wizards jump quickly."</code> 。
testString: 'assert("The five boxing wizards jump quickly.".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"The five boxing wizards jump quickly."</code>.");'
- text: 你的正则表达式应该使用速记字符。
testString: 'assert(/\\W/.test(nonAlphabetRegex.source), "Your regex should use the shorthand character to match characters which are non-alphanumeric.");'
- text: 你的正则表达式应该在<code>"Pack my box with five dozen liquor jugs."</code>找到8个非字母数字字符<code>"Pack my box with five dozen liquor jugs."</code>
testString: 'assert("Pack my box with five dozen liquor jugs.".match(nonAlphabetRegex).length == 8, "Your regex should find 8 non-alphanumeric characters in <code>"Pack my box with five dozen liquor jugs."</code>");'
- text: 你的正则表达式应该在<code>"How vexingly quick daft zebras jump!"</code>找到6个非字母数字字符<code>"How vexingly quick daft zebras jump!"</code>
testString: 'assert("How vexingly quick daft zebras jump!".match(nonAlphabetRegex).length == 6, "Your regex should find 6 non-alphanumeric characters in <code>"How vexingly quick daft zebras jump!"</code>");'
- text: 你的正则表达式应该在<code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>找到12个非字母数字字符<code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>
testString: 'assert("123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ.".match(nonAlphabetRegex).length == 12, "Your regex should find 12 non-alphanumeric characters in <code>"123 456 7890 ABC def GHI jkl MNO pqr STU vwx YZ."</code>");'
Challenge Seed
let quoteSample = "The five boxing wizards jump quickly.";
let nonAlphabetRegex = /change/; // Change this line
let result = quoteSample.match(nonAlphabetRegex).length;
Solution
// solution required