Date | JavaScript date to string
![Date](https://i.imgur.com/axBPWDg.jpg)
下面的例子展示如何使用兩個Date物件來求得執行程式所花費毫秒數。由於日(在夏令時轉換時)、月及年的長度並非固定,如果表示經過時間採用時、分、秒以外的單位,需要對這些差異作深入的研究,以處理可能發生的問題。varstart=Date.now();doSomethingForALongTime();varend=Date.now();varelapsed=end-start;varstart=newDate();doSomethingForALongTime();varend=newDate();varelapsed=end.getTime()-start.getTime();functionprintElapsedTime(fTest){varnStartTime=Date.now(),vReturn=fTest(),nEndTime=Date.now();console.log(E...
下面的例子展示如何使用兩個 Date 物件來求得執行程式所花費毫秒數。
由於日(在夏令時轉換時)、月及年的長度並非固定,如果表示經過時間採用時、分、秒以外的單位,需要對這些差異作深入的研究,以處理可能發生的問題。
var start = Date.now(); doSomethingForALongTime(); var end = Date.now(); var elapsed = end - start; var start = new Date(); doSomethingForALongTime(); var end = new Date(); var elapsed = end.getTime() - start.getTime(); function printElapsedTime(fTest) { var nStartTime = Date.now(), vReturn = fTest(), nEndTime = Date.now(); console.log(Elapsed time: + String(nEndTime - nStartTime) + milliseconds); return vReturn; } yourFunctionReturn = printElapsedTime(yourFunction);取得本站獨家住宿推薦 15%OFF 訂房優惠
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Date.prototype.toString() | JavaScript date to string
2021年7月20日 — The toString() method is automatically called when a date is to be represented as a text value, e.g. console.log(new Date()) , or when a date is ... Read More
Date | JavaScript date to string
1995年12月17日 — 建立一個 JavaScript Date 物件來指向某一個時間點。 ... nEndTime = Date.now(); console.log('Elapsed time: ' + String(nEndTime - nStartTime) + ... Read More
Date.prototype.toDateString() | JavaScript date to string
2021年7月20日 — Date instances refer to a specific point in time. Calling toString() will return the date formatted in a human readable form in English. Read More
Date.parse() | JavaScript date to string
The parse() method takes a date string (such as 2011-10-10T14:48:00 ) and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC. This ... Read More
Date() constructor | JavaScript date to string
2021年10月18日 — Calling new Date() (the Date() constructor) returns a Date object. If called with an invalid date string, it returns a Date object whose ... Read More
Date.prototype.toTimeString() | JavaScript date to string
2021年7月20日 — Date instances refer to a specific point in time. Calling toString() will return the date formatted in a human readable form in English. Read More
Get String in YYYYMMDD format from JS date object? | JavaScript date to string
Working from @o-o's answer this will give you back the string of the date according to a format string. You can easily add a 2 digit year regex for the year & ... Read More
How to format a JavaScript date | JavaScript date to string
Well, what I wanted was to convert today's date to a MySQL friendly date string like 2012-06-23 , and to use that string as a parameter in one of my queries ... Read More
JavaScript Date toString() Method | JavaScript date to string
Every JavaScript object has a toString() method. The toString() method is used internally by JavaScript when the object needs to be displayed as a text (like in ... Read More
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