JS思路方法汇总
sht:删除原第项并返回删除元素值；如果为空则返回und
var a = [1,2,3,4,5];
var b = a.sht; //a:[2,3,4,5] b:1
unsht:将参数添加到原开头并返回长度
var a = [1,2,3,4,5];
var b = a.unsht(-2,-1); //a:[-2,-1,1,2,3,4,5] b:7
注:在IE6.0下测试返回值总为undFF2.0下测试返回值为7所以这个思路方法返回值不可靠需要用返回值时可用splice代替本思路方法来使用
pop:删除原最后项并返回删除元素值；如果为空则返回und
var a = [1,2,3,4,5];
var b = a.pop; //a:[1,2,3,4] b:5
push:将参数添加到原末尾并返回长度
var a = [1,2,3,4,5];
var b = a.push(6,7); //a:[1,2,3,4,5,6,7] b:7
concat:返回个新是将参数添加到原中构成
var a = [1,2,3,4,5];
var b = a.concat(6,7); //a:[1,2,3,4,5] b:[1,2,3,4,5,6,7]
splice(start,deleteCount,val1,val2,...):从start位置开始删除deleteCount项并从该位置起插入val1,val2,...
var a = [1,2,3,4,5];
var b = a.splice(2,2,7,8,9); //a:[1,2,7,8,9,5] b:[3,4]
var b = a.splice(0,1); //同sht
a.splice(0,0,-2,-1); var b = a.length; //同unsht
var b = a.splice(a.length-1,1); //同pop
a.splice(a.length,0,6,7); var b = a.length; //同push
reverse:将反序
var a = [1,2,3,4,5];
var b = a.reverse; //a:[5,4,3,2,1] b:[5,4,3,2,1]
sort(orderfunction):按指定参数对进行排序
var a = [1,2,3,4,5];
var b = a.sort; //a:[1,2,3,4,5] b:[1,2,3,4,5]
slice(start,end):返回从原中指定开始下标到结束下标的间项组成新
var a = [1,2,3,4,5];
var b = a.slice(2,5); //a:[1,2,3,4,5] b:[3,4,5]
join(separator):将元素组起个串以separator为分隔符省略话则用默认用逗号为分隔符
var a = [1,2,3,4,5];
var b = a.join("|"); //a:[1,2,3,4,5] b:"1|2|3|4|5"