
Array.prototype.indexOf=function(obj)...{
var result=-1;
for(var i=0;i<this.length;i++)...{
if(this[i]==obj)...{
result=i;
break;
}
}
return result;
}
var arr = new Array(5);
arr[0]="hello";
arr[1]="welcome to china";
arr[2]="good";
alert(arr.indexOf("good"));
Array.prototype.inArray = function (value) ...{ 
for (var i = 0; i < this.length; i++) ...{ 
if (this[i] === value) ...{
return true;
}
}
return false;
}; 

Array.prototype.max = function()...{ 
for (var i = 1, max = this[0]; i < this.length; i++)...{ 
if (max < this[i]) ...{
max = this[i];
}
return max;
}; 

Array.prototype.min = function()...{ 
for (var i = 1, min = this[0]; i < this.length; i++)...{ 
if (min > this[i]) ...{
min = this[i];
}
return min;
}; 
Array.prototype.indexOf = function(p_var) 
...{
for (var i=0; i<this.length; i++) 
...{
if (this[i] == p_var) 
...{
return(i);
}
}
return(-1);
} 

Array.prototype.exists = function(p_var) ...{return(this.indexOf(p_var) != -1);} 

Array.prototype.queue = function(p_var) ...{this.push(p_var)} 

Array.prototype.dequeue = function() ...{return(this.shift());} 

Array.prototype.removeAt = function(p_iIndex) ...{return this.splice(p_iIndex, 1);} 
Array.prototype.remove = function(o) 
...{
var i = this.indexOf(o);
if (i>-1) 
...{
this.splice(i,1);
}
return (i>-1);
} 
Array.prototype.clear = function() 
...{
var iLength = this.length;
for (var i=0; i < iLength; i++) 
...{
this.shift();
}
} 
Array.prototype.addArray = function(p_a) 
...{
if (p_a) 
...{
for (var i=0; i < p_a.length; i++) 
...{
this.push(p_a[i]);
}
}
} 
Array.prototype.Unique = function() 
...{ 
var a = ...{}; for(var i=0; i<this.length; i++) 
...{
if(typeof a[this[i]] == "undefined")
a[this[i]] = 1;
}
this.length = 0;
for(var i in a)
this[this.length] = i;
return this;
}; 
Array.prototype.indexOf = function(obj, fromIndex) 
...{
if (fromIndex == null) 
...{
fromIndex = 0;
}
else if (fromIndex < 0) 
...{
fromIndex = Math.max(0, this.length + fromIndex);
} 
for (var i = fromIndex; i < this.length; i++) 
...{
if (this[i] === obj) 
...{
return i;
}
} 
return-1;
}; 
Array.prototype.lastIndexOf = function(obj, fromIndex) 
...{
if (fromIndex == null) 
...{
fromIndex = this.length - 1;
}
else if (fromIndex < 0) 
...{
fromIndex=Math.max(0, this.length+fromIndex);
} 
for (var i = fromIndex; i >= 0; i--) 
...{
if (this[i] === obj) 
...{
return i;
}
} 
return -1;
}; 
Array.prototype.insertAt = function(o, i) 
...{
this.splice(i, 0, o);
}; 
Array.prototype.insertBefore = function(o, o2) 
...{
var i = this.indexOf(o2); 
if (i == -1) 
...{
this.push(o);
}
else 
...{
this.splice(i, 0, o);
}
}; 
Array.prototype.remove = function(o) 
...{
var i = this.indexOf(o); 
if (i != -1) 
...{
this.splice(i, 1);
}
}; 
Array.prototype.mm=function() 
...{ 
var a=...{}, m=0, n="";
for(var i=0; i<this.length; i++)
a[this[i]]?++a[this[i]]:a[this[i]]=1; 
for(i in a)...{m=Math.max(m, a[i]); if(m==a[i]) n=i;} 
return ...{"variable": n, "times": m};
}
本文介绍了一系列自定义JavaScript数组方法,包括查找元素位置、检查元素是否存在、添加与移除元素等实用功能,帮助开发者更高效地操作数组。
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