#javascript tips and tricks

The market share of JavaScript has risen to new levels in the last 5–10 years, especially since ES6 was launched in June 2015, making it the most popular programming language for web development, allowing developers to create both front-end UI and back-end logic.

Most of the functions and applications that make the Internet indispensable to modern life are coded in some form of JavaScript. While JavaScript is not the only client-side scripting language on the Internet, it was one of the first and it is still the most widely used. Many developers believe that JavaScript is inefficient and finicky, so they have made many improvements to the language over the years and because of this, every programmer searching for JavaScript Tips and Tricks to level up code.

Convenient and useful techniques to reduce the lines of code and pace up your Dev Work!

In this tutorial, as the best JavaScript development company in USA and India, we will point out a few important JavaScript best practices so you don’t have to learn it the hard way. Get ready to level to your code!

1. DECLARE AND INITIALIZE ARRAYS

2. SORTING ARRAY OF STRING, NUMBERS OR OBJECTS

3. EASY EXCHANGE VARIABLES

4. GET A RANDOM ITEM FROM AN ARRAY

5. GET A RANDOM NUMBER IN A SPECIFIC RANGE

Come aggiungere un array ad un array esistente utilizzando Javascript

Il seguente frammento di codice JavaScript mostra come aggiungere l’array ‘a’ a all’array ‘b’.

Avremmo potuto utilizzare il metodo concat() per ottenere lo stesso risultato, ma il metodo concat() crea un nuovo array, mentre utilizzando Array.prototype.push.apply si aggiunge in automatico l’array a quello esistente.

var a = [1,2,3];

var b = [4,5,6];

Array.prototype.push.apply(a, b);

// a contiene…

How to delete field inside Json Object – 如何把Json 的屬性移除

今日在公司經過同事Code Review…我學會了很多東西 其中一個就是如何delete Json/ Javascript Object 內的一些Field

e.g.

var params = { UserId: membership.id, FirstName: membership.firstName, ScreenName: membership.nickname, location: membership.currentLocation };

假設只有某些權限的用戶才可以看到 location這個field的

我們可以使用 delete keyword 來把Json / Javascript object的 field 移除 e.g.

delete params.location;…

Disable HTML A HREF tag action

今日要遇到一個難題 有一個 AngularJs 的Webpage 不知道怎樣砌。。

因為一按那個A tag 的 tab 便轉了去另一個URL 想了一會便想到有可以嘗試把 “A” tag “HREF” tag 的 動作停用。。看看有什麼效果

那麼怎樣才可以 解決方法十分簡單

我們只需要在 A tag 的 tag 內加入 onclick=”return false”

這個JavaScript action便可以了

<a href="//blog.sharechiwai.com" onclick="return false"> Blog </a>

Hope you find it useful

Javascript get Current Date without time – 如何在Javascript上找出現在的日子.. 不要時間

今天又為自己寫下一些筆記.. 很多時候都需要為網頁的一些 Form 或其他功能去埴上今天/現時的日期.. 很多時候的default/預計功能都會自動加上時間.. 有時就是因為這些 時間令到一些功能有錯誤.. E.G. 例如你想比較兩個日子

解決方法十分簡單 我們可使用 new Date().toJSON() 來 輸出 “2015-08-21T14:46:06.729Z” 之後用slice(0,10) 取出 日期的字串 之後我們便可以用new Date()來把這個日子轉為javascript的 日子object 以方便之後處理

Console.log(new Date().toJSON()); // result: "2015-08-21T14:46:06.729Z"

console.log(new Date().toJSON().slice(0,10)); // 2015-08-24