Some commonly used JavaScript functions (json) with detailed description_javascript skills

Copy code The code is as follows:

var YX = {
//Get the JS built-in data type Type, return value includes [Date,RegExp,Number,String,Array,Boolean,Function,null,undefined,Object]
getType : function(obj){
return obj == null ? obj "" : Object .prototype.toString.call(obj).slice(8,-1);
}
//Create a simple class
, createClass : function(){
return function(){
this.init.apply(this,arguments);
};
}
//Format string, YX.format("{0},{1},haha",[ "hello","world"])
,format : function(str,params){
var reg = /{(d )}/g;
return str.replace(reg,function(match ,val){
return params[~~val];
});
}
//Format string, YX.format2("Mathematics={Mathematics}, Chinese={Chinese },haha",{"Mathematics":100,"Chinese":99})
,format2 : function(str,params){
var reg = /{([^{}] )}/g ;
return str.replace(reg,function(match,val){
return params[val];
});
}
//Formatting time, YX.format3( new Date,"yy-mm-dd H:M:S")
,format3 : function(date,patten){
var y = date.getFullYear(),mon = date.getMonth() 1, d = date.getDate(),h = date.getHours(),min = date.getMinutes(),s = date.getSeconds()
,zero = function(o){return ("0" o). slice(-2)}
,matchs = {"yy":y,"y":(y "").slice(-2),"mm":zero(mon),"m":mon, "dd":zero(d),"d":d,"HH":zero(h),"H":h,"MM":zero(min),"M":min,"SS":zero (s),"S":s};
return patten.replace(/yy|y|mm|m|dd|d|HH|H|MM|M|SS|S/g,function(match) {
return matches[match];
});
}
//Array deduplication, YX.unique([1,1,"1",document.body,document.body]
,unique : function(arr){
var kv = {},len = arr.length,rs = [],t;
for(;len--;){
t = arr[len];
(kv[t]==undefined || kv[t]!==t) && (kv[t]=t,rs.push(t));
}
return rs;
}
};