Summarize the aspects to be aware of creating an array

In JavaScript, you can create an array using the array constructor, or use the array direct amount [], which is the preferred method. The array object inherits from Object.prototype, and the array execution typeof operator returns an object instead of an array. However, the [] instanceof array also returns TRUE.　　That is, the implementation of the class array object is more complex, such as the strings object, the arguments object, the arguments object is not an instance of array, but has the length property, and can be indexed by the value, so can be like an array of loop operation.　　In this article, I'll review some of the methods of array prototyping and explore the use of these methods. Loops:. ForEach judgment:. Some and. Every differentiate. Join and. Concat Stacks and queue implementations:. Pop,. Push,. Shift, and. Unshift model mappings:. Map query:. Filter sort:. Sort calculation ：

1. Introduction to JavaScript native array functions

Summary: In JavaScript, you can create an array using the array constructor, or use the array direct amount, which is the preferred method. The array object inherits from Object.prototype, and the array execution typeof operator returns an object instead of an array. However, the instanceof array also returns TRUE. ... . ..., HTML5 China, China's largest HTML5 chinese portal.

2. Base of PHP arrays

Introduction: First, how to define an array: There are two main ways to create an array in PHP, let's look at how to create an array (1) to create an array directly for each element's assigned value. The format is: $arrayname [key] ...

3. How to bulk create arrays using JavaScript

Summary: JavaScript has many ways to create arrays in bulk, and to measure their performance, create an array of length 100000 using different methods, with the keys and values equal.

4. Detailed description of how JavaScript creates arrays in bulk (figure)

Introduction: JavaScript has many ways to create arrays in bulk, in order to measure their performance, I used a different method to create a length of 100000 array, and the keys and values are equal, today's small series to share the method of creating arrays based on JS batch, take a look at it together

5. Detailed code examples of interesting JavaScript native array functions

Summary: In JavaScript, you can create an array using the array constructor, or use the array direct amount [], which is the preferred method. The array object inherits from Object.prototype, and the array execution typeof operator returns an object instead of an array. However, the [] instanceof array also returns TRUE. That is, the implementation of the class array object is more complex, such as the strings object, the arguments object, the arguments object is not an instance of array, but has the length property and can be indexed by the index:

6. PHP Basic Tutorial Eight array

Introduction: This section explains the contents of an array of arrays to create an array of dynamically growing arrays of related functions array operators in the previous we learned whether variables and constants are individual data, and sometimes we have the need to put some of the same type of values or some irrelevant values, Store it reasonably, and use it to take out the data in a certain way. At this time the preceding variables and so on can not meet the requirements, here is the use of arrays. Arrays in PHP are not the same as arrays in other languages, which is also the PHP language syntax

7. js-Array

Summary: Arrays (Array object) arrays are an object. An array is an ordered collection of values. Each value is called an element (which can be any type), and each element has a position in the array, represented by a number, called an index (0-232-2). Create an array 1. Use the array literal (direct amount) var empty=[];//empty array var misc=[1.1,true, "A", [1,{x:1,y:2}]];//element type different var count=[1,,2];//has 3 elements, intermediate ...

8. PHP Array Basics

Summary: How to define an array: There are two main ways to create an array in PHP, let's look at how to create an array

9. Arrays of PHP Array ()

Summary: Array () creates arrays with keys and values. 　　If the key is omitted when the array is specified, an integer key is generated, starting with 0 and incrementing by 1. To create an associative array with array (), you can use the => 　　 To separate the keys and values. To create an empty array, the parameter is not passed to array (): $new = Array (); Note: Array () is actually a language structure (language constru ...

One of PHP array learning

Introduction: PHP Array Learning array: A collection of keywords and values, the same PHP array can hold a number of different data types of values, array subscript from the zero-based creation of the array of several ways: (1) $arr [0]=1;//array elements $arr [1]=2.8; ...... (2) $arr = Array (1,2.8,"str",.....); (3)//can specify the array elements themselves ...

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