1. var arr = [
    2.     {name:"李四",age:18},
    3.     {name:"王四",age:20},
    4.     {name:"zs",age:8},
    5.     {name:"cs",age:16}
    6. ]
    7. var newValue = []
    9. for(var i=0;i<arr.length;i++){
    10.     if(arr[i].age>16){
    11.             newValue.push(arr[i])
    12.     }
    13. }
    14. console.log(newValue);
    15. 判断数组中对象的age属性，如果大于16就将其添加到newValue数组中
    1. var arr = [1,2,3,4,5,6,7,8,9]
    2. var test = []
    3. for(var i=0;i<arr.length;i += 3){
    4.         test.push(arr.slice(i,i+3))
    5. }
    6. console.log(test);
    7. 将其三个数一组，截取成三行三列的二维数组
    1. 查询数组中的最小值
    2. 1、
    3. var arr = [4,6,18,1]
    4. var min = arr[0]
    5. console.log(arr.length);
    6. for(var i=1;i<arr.length;i++){
    7.     if(min>arr[i]){
    8.             min = arr[i]
    9.     }
    10. }
    11. console.log(min);
    13. 2、
    14. var arr = [4,6,18,1]
    15. var min = arr[0]
    16. for(var i=1;i<arr.length;i++){
    17.     min = Math.min(arr[0],arr[i])
    18. }
    20. 3、
    21. var arr = [4,6,18,1]
    22. var min 
    23. for(var i=0;i<arr.length-1;i++){
    24.     for(var j=i+1;j<arr.length;j++){
    25.         if(arr[i]<arr[j]){
    26.             min = arr[i]
    27.         }else{
    28.             min = arr[j]
    29.         }
    30.         min = Math.min(arr[i],arr[j])
    31.     }
    32. }
    1. var arr = [
    2.     {name:'lisi',age:'12px'},
    3.     {name:'wangwu',age:'13px'},
    4.     {name:'zhangsan',age:'14px'}
    5. ]
    6. for(var i=0;i<arr.length;i++){
    7.         var age = parseInt(arr[i].age)*2
    8.     arr[i].age = age
    9.     arr[i].like = true
    10.     if(arr[i].age<26){
    11.             arr[i].like = false
    12.     }
    13. }
    14. console.log(arr);
    15. 将数组arr中的对象属性age的值转换为数字
    16. 并在age大于24的对象中添加like=true属性
    1. var searchs = [
    2.             {
    3.                 spell:'A',
    4.                 city:[
    5.                     {name:'阿里',id:1001},
    6.                     {name:'阿拉',id:1001},
    7.                     {name:'阿克',id:1001}
    8.                 ]
    9.             },{
    10.                 spell:'T',
    11.                 city:[
    12.                     {name:'天下',id:2001},
    13.                     {name:'天天',id:2002},
    14.                     {name:'天里',id:2003}
    15.                 ]
    16.             }
    17.         ]
    20.         var input = document.getElementById('input')
    21.         var arr = []
    22.         var kw;
    23.         input.onkeydown = function(event){
    24.             if(event.keyCode === 13){
    25.                 if(this.value != ""){
    26.                     kw = this.value
    27.                     addCity(kw)
    28.                     console.log(arr);
    29.                     this.value = ""
    30.                     kw = this.value
    31.                     arr = []
    32.                 }
    33.             }
    34.         }
    36.         function addCity(keyword){
    37.             for(var i=0;i<searchs.length;i++){
    38.                 var citys = searchs[i].city
    39.                 for(var j=0;j<citys.length;j++){
    40.                     console.log(citys[j]);
    41.                     if(citys[j].name.includes(keyword)){
    42.                         arr.push(citys[j])
    43.                     }
    44.                 }
    45.             }
    46.         }
    47. 在输入框中输入，获取到输入框中的value值，并通过数组的include方法判断这个值是否在数组的对象的那么属性的属性值中，
    48. 在的话，将这个对象保存到另一个数组中，输出