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<title>无标题文档</title>
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<script>
function add(a,b){
return Number(a) +
Number(b);
};
var arr = [1,2,3,4,5,6,7,8,9,10
];
Array.prototype.reduce_self =
function(f,value){
var i;
for(i = 0; i<
this.length; i+=1
){
value = f(
this[i] , value )
};
return value;
};
Array.prototype.dim =
function(n,init){
var a =
[] , i;
for(i = 0; i < n; i+=1
){
a[i] =
init
};
return a;
};
Array.prototype.matrix =
function(m,n,initial){
var a, i, j, mat =
[];
for(i=0; i<m; i+=1
){
a =
[];
for(j=0; j<n; j++
){
a[j] =
initial;
};
mat[i] =
a;
}
return mat;
};
//RegExp
var parse_url = /^(?:([a-zA-z]+):)?(\/{0,3})([0-9.\-a-zA-Z]+)(?::(\d+))?/
;
var url = "http://www.chenqihao.com:80/goodparts?q#fragment"
;
var result =
parse_url.exec(url);
var names = ['url','scheme','slash','host','port'
];
var blanks = ' '
, i ;
for(i=0; i<names.length; i+=1
){
document.writeln(names[i] + ':' + result[i] + '<br>'
)
};
//排序
var arr = [2,1,3,66,10,200,28,29
];
arr.sort();
console.log(arr)
arr.sort(function(a,b){
if(a<
b){
return 1
}else{
return -1
}
});
console.log(arr);
var arr1 = [10,29,'ddd',100,'bbd',29,0,18,'a',18,'b'
];
arr1.sort(function(a,b){
if( a ===
b){
return 0
;
}
if(
typeof a == 'number' &&
typeof b == 'number'
){
if(a < b){
return -1}
else{
return 1
};
};
if(
typeof a <
typeof b){
return -1
};
});
var by =
function(name){
return function(a,b){
var c,d;
if(
typeof a === 'object' &&
typeof b === 'object' && a &&
b){
c = a [name],d =
b[name];
if(a ===
b){
return 0
};
if(
typeof a ===
typeof b ){
return a < b ? -1 : 1
;
};
return typeof a <
typeof b ? -1 : 1
;
};
};
};
var obj =
[
{f : 'C'
},
{f : 'E'
},
{f : 'B'
},
{f : 'A'
},
{f : 'S'
}
];
obj.sort( by('f'
) );
console.log( JSON.stringify(obj) );
var arr = ['a','b','c','d'
];
arr._unshift =
function(){
this.splice.apply(
this,[0,0
].concat(Array.prototype.slice.call(arguments)))
};
//Array.prototype.slice.call(arguments) 可以将类数组转换为真数组
Function.prototype._bind =
function(that){
var method =
this,
slice =
Array.prototype.slice,
args = slice.apply(arguments,[1
]);
return function(){
method.apply( that,args.concat(slice.apply(arguments,[0
])) )
};
};
//下面这个东东，经常服务器返回东西经过编码了，用这个在转下；反正转来转去的
/* 主要是这四个字符 < > & " */
String.prototype.entityfy =
function(){
var charactor =
{
'<' : '<'
,
'>' : '>'
,
'&' : '&'
,
'"' : '"'
};
var _this =
this;
return (
function(){
return _this.replace(/[<>&"]/g,
function(a){
return charactor[a]
})
})();
};
console.log( '<>&"'
.entityfy() )
</script>
</body>
</html>
转载于:https://www.cnblogs.com/diligenceday/p/3439632.html
