68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
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---
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title: Count occurrences of a substring
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id: 596fda99c69f779975a1b67d
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challengeType: 5
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videoUrl: ''
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localeTitle: 计算子字符串的出现次数
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---
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## Description
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<section id="description">任务： <p>创建函数或显示内置函数，以计算字符串中子字符串的非重叠出现次数。 </p><p>该函数应该有两个参数： </p>第一个参数是要搜索的字符串，第二个参数是要搜索的子字符串。 <p>它应该返回一个整数计数。 </p><p>匹配应产生最多数量的非重叠匹配。 </p><p>通常，这实质上意味着从左到右或从右到左匹配。 </p></section>
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## Instructions
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<section id="instructions">
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>countSubstring</code>是一个函数。
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testString: 'assert(typeof countSubstring === "function", "<code>countSubstring</code> is a function.");'
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- text: '<code>countSubstring("the three truths", "th")</code>应该返回<code>3</code> 。'
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testString: 'assert.equal(countSubstring(testCases[0], searchString[0]), results[0], "<code>countSubstring("the three truths", "th")</code> should return <code>3</code>.");'
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- text: '<code>countSubstring("ababababab", "abab")</code>应返回<code>2</code> 。'
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testString: 'assert.equal(countSubstring(testCases[1], searchString[1]), results[1], "<code>countSubstring("ababababab", "abab")</code> should return <code>2</code>.");'
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- text: '<code>countSubstring("abaabba*bbaba*bbab", "a*b")</code>应返回<code>2</code> 。'
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testString: 'assert.equal(countSubstring(testCases[2], searchString[2]), results[2], "<code>countSubstring("abaabba*bbaba*bbab", "a*b")</code> should return <code>2</code>.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function countSubstring (str, subStr) {
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// Good luck!
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return true;
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}
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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console.info('after the test');
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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