JavaScript join() 方法
()默认已","为间隔开,如果换成其他的则“空格或文本或其他东西”
实例
把数组中的所有元素转换为一个字符串:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var energy = fruits.join();
var energy = fruits.join();
energy输出结果:
Banana,Orange,Apple,Mango
JavaScript pop() 方法
实例
移除最后一个数组元素
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.pop();
fruits.pop();
fruits 结果输出:
Banana,Orange,Apple
JavaScript push() 方法
实例
数组中添加新元素:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.push("Kiwi")
fruits.push("Kiwi")
fruits 结果输出:
Banana,Orange,Apple,Mango,Kiwi
JavaScript shift() 方法
实例
从数组中移除元素:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.shift()
fruits.shift()
fruits结果输出:
Orange,Apple,Mango
JavaScript unshift() 方法
实例
将新项添加到数组起始位置:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.unshift("Lemon","Pineapple");
fruits.unshift("Lemon","Pineapple");
fruits 将输出:
Lemon,Pineapple,Banana,Orange,Apple,Mango
JavaScript reverse() 方法
实例
颠倒数组中元素的顺序:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.reverse();
fruits.reverse();
fruits 结果输出:
Mango,Apple,Orange,Banana
JavaScript sort() 方法
实例
数组排序:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
fruits.sort();
fruits 输出结果:
Apple,Banana,Mango,Orange
JavaScript concat() 方法
实例
合并三个数组的值:
var hege = ["Cecilie", "Lone"];
var stale = ["Emil", "Tobias", "Linus"];
var kai = ["Robin"];
var children = hege.concat(stale,kai);
var stale = ["Emil", "Tobias", "Linus"];
var kai = ["Robin"];
var children = hege.concat(stale,kai);
children 输出结果:
Cecilie,Lone,Emil,Tobias,Linus,Robin
JavaScript slice() 方法
实例
在数组中读取元素:
var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = fruits.slice(1,3);
var citrus = fruits.slice(1,3);
citrus 结果输出:
Orange,Lemon
JavaScript splice() 方法
实例
数组中添加新元素:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2,0,"Lemon","Kiwi");
fruits.splice(2,0,"Lemon","Kiwi");
fruits 输出结果:
Banana,Orange,Lemon,Kiwi,Apple,Mango