70 lines
1.7 KiB
Markdown
70 lines
1.7 KiB
Markdown
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---
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id: 587d7b84367417b2b2512b35
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title: 捕獲拼錯的變量名和函數名
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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` 方法是檢查中間值和程序輸出類型的兩種主要方法。 現在是時候瞭解一下 bug 出現的常見的情形。 一個語法級別的問題是打字太快帶來的低級拼寫錯誤。
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變量或函數名的錯寫、漏寫或大小寫弄混都會讓瀏覽器嘗試查找並不存在的東西，並報出“引用錯誤”。 JavaScript 變量和函數名稱區分大小寫。
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# --instructions--
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修復代碼中的兩個拼寫錯誤，以便 `netWorkingCapital` 計算有效。
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# --hints--
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檢查計算 netWorkingCapital 值時使用的兩個變量的拼寫是否正確，控制檯應該輸出 "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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代碼中不應存在拼寫錯誤的變量。
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```js
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assert(!code.match(/recievables/g));
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```
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應在代碼中聲明並正確使用 `receivables` 變量。
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```js
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assert(code.match(/receivables/g).length == 2);
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```
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代碼中不應存在拼寫錯誤的變量。
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```js
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assert(!code.match(/payable;/g));
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```
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應在代碼中聲明並正確使用 `payables` 變量。
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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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