* fix: Chinese test suite Add localeTiltes, descriptions, and adjust test text and testStrings to get the automated test suite working. * fix: ran script, updated testStrings and solutions
2.0 KiB
2.0 KiB
id, title, challengeType, videoUrl, localeTitle
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
587d7db7367417b2b2512b9d | Match Beginning String Patterns | 1 | 匹配开始字符串模式 |
Description
character set
内的caret
符( ^
)来创建[^thingsThatWillNotBeMatched]
形式的negated character set
。在character set
, caret
用于在字符串的开头搜索模式。 让firstString =“Ricky是第一个,可以找到。”;
让firstRegex = / ^ Ricky /;
firstRegex.test(firstString);
//返回true
让notFirst =“你现在找不到Ricky了。”;
firstRegex.test(notFirst);
//返回false
Instructions
caret
只能在字符串rickyAndCal
的开头找到"Cal"
。 Tests
tests:
- text: 你的正则表达式应该用大写字母搜索<code>"Cal"</code> 。
testString: assert(calRegex.source == "^Cal");
- text: 你的正则表达式不应该使用任何标志。
testString: assert(calRegex.flags == "");
- text: 你的正则表达式应该匹配字符串开头的<code>"Cal"</code> 。
testString: assert(calRegex.test("Cal and Ricky both like racing."));
- text: 您的正则表达式不应与字符串中间的<code>"Cal"</code>匹配。
testString: assert(!calRegex.test("Ricky and Cal both like racing."));
Challenge Seed
let rickyAndCal = "Cal and Ricky both like racing.";
let calRegex = /change/; // Change this line
let result = calRegex.test(rickyAndCal);
Solution
// solution required