javascript return undefined
2018年8月10日 — 一個function內如果沒有明確呼叫return時，回傳值是undefined。 函式也是一種特殊的物件型態. 函式也是物件，可以被指派給一個變數。它也可以被放進 ... ,2024年7月25日 — A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns ... ,2016年6月23日 — In my opinion, return null . Leave undefined to JavaScript itself. However, there is no better so this is a matter of opinion. ,2024年7月28日 — return 表達式會終止函式執行，並指明函式呼叫器（function caller）要回傳的數值。 ,2023年1月31日 — To return undefined from a function in JavaScript, you simply don't return anything or you explicitly return the value undefined . ,2023年9月12日 — 1.函數不論有沒有參數，設定後，不論有沒有用小括號執行，JS都會回覆undefined。 · 2.解法，函數裡面加入return 回傳結果，JS就不會回覆undefined。 · 3. ,2023年11月14日 — Every function returns undefined if you don't return something. In your code, if an error is thrown in the try catch block, no return statement ... ,2019年3月21日 — Every function returns something. It may not be something you want or need, it may not be something you consume, it may not even be something ... ,When there is no identifier before a function call (i.e. obj.foo() ) , JavaScript assumes it is being called by the global variable. So when it finally runs ... ,// Because x is a variable parameter and he must need a return keyword to show the value of this variable, otherwise, he doesn't work. ... Because you haven't ...
| 相關軟體 Firefox 資訊 | |
|---|---|
 javascript return undefined 相關參考資料
JavaScript 函式的一些基本觀念. Return value 回傳值
2018年8月10日 — 一個function內如果沒有明確呼叫return時，回傳值是undefined。 函式也是一種特殊的物件型態. 函式也是物件，可以被指派給一個變數。它也可以被放進 ... https://medium.com undefined - JavaScript - MDN Web Docs - Mozilla
2024年7月25日 — A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns ... https://developer.mozilla.org Is it better to return `undefined` or `null` from a javascript ...
2016年6月23日 — In my opinion, return null . Leave undefined to JavaScript itself. However, there is no better so this is a matter of opinion. https://stackoverflow.com return - JavaScript - MDN Web Docs - Mozilla
2024年7月28日 — return 表達式會終止函式執行，並指明函式呼叫器（function caller）要回傳的數值。 https://developer.mozilla.org How to return undefined from a function in JavaScript
2023年1月31日 — To return undefined from a function in JavaScript, you simply don't return anything or you explicitly return the value undefined . https://www.quora.com 2024看懂AI寫JavaScript時，回傳undefined的5種狀況- 陳國仁
2023年9月12日 — 1.函數不論有沒有參數，設定後，不論有沒有用小括號執行，JS都會回覆undefined。 · 2.解法，函數裡面加入return 回傳結果，JS就不會回覆undefined。 · 3. https://medium.com How to avoid returning undefined from a function that ...
2023年11月14日 — Every function returns undefined if you don't return something. In your code, if an error is thrown in the try catch block, no return statement ... https://www.reddit.com Returning undefined - JavaScript
2019年3月21日 — Every function returns something. It may not be something you want or need, it may not be something you consume, it may not even be something ... https://forum.freecodecamp.org why does this return undefined
When there is no identifier before a function call (i.e. obj.foo() ) , JavaScript assumes it is being called by the global variable. So when it finally runs ... https://www.codecademy.com Why function "return UNDEFINED"
// Because x is a variable parameter and he must need a return keyword to show the value of this variable, otherwise, he doesn't work. ... Because you haven't ... https://www.sololearn.com |