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70 lines
1.7 KiB
Markdown
70 lines
1.7 KiB
Markdown
---
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id: 587d7b84367417b2b2512b35
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title: 捕获拼错的变量名和函数名
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challengeType: 1
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forumTopicId: 301186
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dashedName: catch-misspelled-variable-and-function-names
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---
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# --description--
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`console.log()` 和 `typeof` 方法是检查中间值和程序输出类型的两种主要方法。 现在是时候了解一下 bug 出现的常见的情形。 一个语法级别的问题是打字太快带来的低级拼写错误。
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Transposed, missing, or miscapitalized characters in a variable or function name will have the browser looking for an object that doesn't exist - and complain in the form of a reference error. JavaScript 变量和函数名称区分大小写。
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# --instructions--
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修复代码中的两个拼写错误，以便 `netWorkingCapital` 计算有效。
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# --hints--
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检查计算 netWorkingCapital 值时使用的两个变量的拼写是否正确，控制台应该输出 "Net working capital is: 2"。
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```js
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assert(netWorkingCapital === 2);
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```
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代码中不应该有拼写错误的变量实例。
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```js
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assert(!code.match(/recievables/g));
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```
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应在代码中声明并正确使用 `receivables` 变量。
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```js
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assert(code.match(/receivables/g).length == 2);
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```
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代码中不应该有拼写错误的变量实例。
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```js
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assert(!code.match(/payable;/g));
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```
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应在代码中声明并正确使用 `payables` 变量。
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```js
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assert(code.match(/payables/g).length == 2);
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```
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# --seed--
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## --seed-contents--
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```js
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let receivables = 10;
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let payables = 8;
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let netWorkingCapital = recievables - payable;
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console.log(`Net working capital is: ${netWorkingCapital}`);
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```
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# --solutions--
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```js
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let receivables = 10;
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let payables = 8;
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let netWorkingCapital = receivables - payables;
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console.log(`Net working capital is: ${netWorkingCapital}`);
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```
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