Date.now()//
var dt=new Date()
dt.getTime()//
dt.getFullYear()//
dt.getMonth()// 0-11
dt.getDate()// 1-31
dt.getHours()// 0-23
dt.getMinutes()// 0-59
dt.getSeconds()// 0-59
//
Math.random()
// api
//forEach
var array=[1,2,3]
array.forEach((item,index) => {
console.log(index,item)
});
//every ,
var array=[1,2,3,5]
var result=array.forEach((item,index) => {
if(item<4){
return true
}
});
console.log(result)
//some ,
var array=[1,2,3,5]
var result=array.forEach((item,index) => {
if(item<4){
return true
}
});
console.log(result)
//sort
var array=[1,2,6,8,3,5]
var result=array.sort((a,b) => {
return a-b
});
console.log(result)
//map
var array=[1,2,6,8,3,5]
var result=array.sort((item,index) => {
return ''+item+''
});
console.log(result)
//filter
var array=[1,2,6,8,3,5]
var result=array.filter((item,index) => {
if(item>=2){
return true
}
});
console.log(result)
// api
for(var key in obj){
}