Four different ways to remove duplicate values ​​from an array in JS_javascript skills

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///

2 /// Enter key button Event (this method needs to be executed after the page is loaded, such as calling in ready in Jquery)--Method 1
///

/// Calling example:
// / var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);
/// var v_ArrayResult = v_Array .deleteEle();
/// alert(v_ArrayResult); //Return results:, 2, 3, 4, 5, 6, 7
Array.prototype.deleteEle = function () {
var o = {}, newArr = [], i, j;
for (i = 0; i < this.length; i ) {
if (typeof (o[this[i]]) == "undefined") {
o[this[i]] = "";
}
}
for (j in o) {
newArr.push(j)
}
return newArr;
}
///

/// Enter key button event (this method needs to be executed after the page is loaded, such as calling in ready in Jquery )--Method 2
///

/// Calling example:
/// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7 , 3, 3, 2, 2, 4, 2, 1, 1, 3);
/// var v_ArrayResult = v_Array.deleteEleReg();
/// alert(v_ArrayResult); //Return the result :, 2, 3, 4, 5, 6, 7
Array.prototype.deleteEleReg = function () {
return this.reverse().join(",").match(/([^, ] )(?!.*1)/ig).reverse();
}
///

/// Enter key button event (this method needs to be loaded after the page Executed later, such as calling in ready in Jquery)--Method 3
///

/// array
/// Calling example:
/// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);
/// alert(unique(v_Array)); //Return results:, 2, 3, 4, 5, 6, 7
function deleteEleFunction(array) {
var ret = [ ], record = {}, it, tmp, obj = "__object__", bak = [], i, len;
var type = {
"number": function (n) { return "__number__" n ; },
"string": function (n) { return "__string__" n; },
"boolean": function (n) { return "__boolean__" n; },
"undefined": function (n) { return "__undefined__"; },
"object": function (n) {
return n === null ? "__null__" : obj in n ? n[obj] : (n[ obj] = obj bak.push(n));
}
};
for (i = 0, len = array.length; i < len; i ) {
it = array [i]; tmp = type[typeof it](it);
if (!(tmp in record)) { ret.push(it); record[tmp] = true; }
}
for (i = 0, len = bak.length; i < len; delete bak[i ][obj]) { }
return ret;
};

/// < summary>< For example, called in ready in Jquery)--Method 4
///
/// Calling example:
/// var v_Array = new Array(1, 2, 3 , 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);
/// var v_ArrayResult = v_Array.deleteEleDis();
/// alert (v_ArrayResult); //Return results:, 2, 3, 4, 5, 6, 7
Array.prototype.deleteEleDis = function () {
var a = [], b = [];
for (var prop in this) {
var d = this[prop];
if (d === a[prop]) continue; //Prevent looping to prototype
if (b[d ] != 1) {
a.push(d);
b[d] = 1;
}
}
return a;
}