一、js中物件合併的方法

1)第一種方法

var a = {
  a : '1',
b : '2'
}

var content = {
  c: '3',
...a
}
console.log(content) //content = {c: "3", a: "1", b: "2"}

2)第二種方法

var content = {}
var a = {
  a: '1',
b: '2',
}
var c = {
  c: '3'
}

Object.assign(content, a, c);
console.log(content) //content = {a: "1", b: "2", c: "3"}
 

var a = {
  a: '1',
b: '2',
}
var c = {
  c: '3'
}

var content = Object.assign(a, c);
console.log(content)   //content = {a: "1", b: "2", c: "3"}
console.log(a)     //a = {a: "1", b: "2", c: "3"}
console.log(c)     // c = {c: '3'}

var a = {
  a: '1',
b: '2',
}
var c = {
  c: '3'
}

var content = Object.assign
 
({}, a, c);
console.log(content)  //content = {a: "1", b: "2", c: "3"}
console.log(a)     //a = {a: "1", b: "2"}
console.log(c)     // c = {c: '3'}

二、js中數組合並的方法

1）第一種方法

var a = [1,2]
var b = [3,4]

var content = a.concat(b)

console.log(content) //content = [1, 2, 3, 4]

2）第二種方法

var a = [1,2]
var b = [3,4]

for(var 
 
i in b){
  a.push(b[i]);
}
console.log(a) //a = [1, 2, 3, 4]

3）第三種方法

var a = [1,2]
var b = [3,4]

a.push.apply(a,b)
console.log(a) //a = [1, 2, 3, 4]

var a = [1,2]
a.push(3,4,)
console.log(a) //a = [1, 2, 3, 4]

三、js中字串合併的方法

1） 第一種方法

var a = 'aa'
var b = 'bb'
var content = a + b
console.log(content) //conten ='aabb'

2）第二種方法

var a = 'aa'
var b = 'bb'
var content = a.concat(b)
console.log(content) //content ='aabb'