freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.chinese.md

id, title, isRequired, challengeType, videoUrl, localeTitle

id	title	isRequired	challengeType	videoUrl	localeTitle
ac6993d51946422351508a41	Truncate a String	true	5		截断字符串

Description

如果字符串（第一个参数）长于给定的最大字符串长度（第二个参数），则截断该字符串。返回带有...结尾的截断字符串。如果卡住，请记得使用Read-Search-Ask 。编写自己的代码。

Instructions

Tests

tests:
  - text: '<code>truncateString(&quot;A-tisket a-tasket A green and yellow basket&quot;, 8)</code>应该返回“A-tisket ......”。'
    testString: 'assert(truncateString("A-tisket a-tasket A green and yellow basket", 8) === "A-tisket...", "<code>truncateString("A-tisket a-tasket A green and yellow basket", 8)</code> should return "A-tisket...".");'
  - text: '<code>truncateString(&quot;Peter Piper picked a peck of pickled peppers&quot;, 11)</code>应该回归“Peter Piper ......”。'
    testString: 'assert(truncateString("Peter Piper picked a peck of pickled peppers", 11) === "Peter Piper...", "<code>truncateString("Peter Piper picked a peck of pickled peppers", 11)</code> should return "Peter Piper...".");'
  - text: '<code>truncateString(&quot;A-tisket a-tasket A green and yellow basket&quot;, &quot;A-tisket a-tasket A green and yellow basket&quot;.length)</code>应该返回“A-tisket a-tasket A green and yellow basket”。'
    testString: 'assert(truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length) === "A-tisket a-tasket A green and yellow basket", "<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)</code> should return "A-tisket a-tasket A green and yellow basket".");'
  - text: '<code>truncateString(&quot;A-tisket a-tasket A green and yellow basket&quot;, &quot;A-tisket a-tasket A green and yellow basket&quot;.length + 2)</code>应返回“A-tisket a-tasket A green and yellow basket”。'
    testString: 'assert(truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length + 2) === "A-tisket a-tasket A green and yellow basket", "<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length + 2)</code> should return "A-tisket a-tasket A green and yellow basket".");'
  - text: '<code>truncateString(&quot;A-&quot;, 1)</code>应返回“A ...”。'
    testString: 'assert(truncateString("A-", 1) === "A...", "<code>truncateString("A-", 1)</code> should return "A...".");'
  - text: '<code>truncateString(&quot;Absolutely Longer&quot;, 2)</code>应返回“Ab ...”。'
    testString: 'assert(truncateString("Absolutely Longer", 2) === "Ab...", "<code>truncateString("Absolutely Longer", 2)</code> should return "Ab...".");'

Challenge Seed

function truncateString(str, num) {
  // Clear out that junk in your trunk
  return str;
}

truncateString("A-tisket a-tasket A green and yellow basket", 8);

Solution

// solution required