JavaScript rhyme appreciate some of the classic JS code _javascript tips

1. The simultaneous conversion into numerical type:
' 10.567890′|0
Results: 10
' 10.567890′^0
Results: 10
-2.23456789|0
Results:-2
~~-2.23456789
Results:-2
2. Date Turn value:
var d = +new Date (); 1295698416792
3. Class Array object to an array:
var arr = [].slice.call (arguments)
4. Nice random code:
Math.random (). toString. substring (2); 14-bit
Math.random (). toString. substring (2); 11-bit
5. Merging arrays:
var a = [1,2,3];
var b = [4,5,6];
Array.prototype.push.apply (A, b);
Uneval (a); [1,2,3,4,5,6]
6. Full digit by 0:
function Prefixinteger (num, length) {
Return (Num/math.pow (length)). toFixed (length). substr (2);
}
7. Exchange Value:
a= [B, b=a][0];
8. Inserts an array into another array at the specified location:
var a = [1,2,3,7,8,9];
var b = [4,5,6];
var insertindex = 3;
A.splice.apply (A, Array.concat (Insertindex, 0, b));
a:1,2,3,4,5,6,7,8,9
9. Delete array elements:
var a = [1,2,3,4,5];
A.splice (3,1);
10. Quickly take the maximum and minimum value of the array
Math.max.apply (Math, [1,2,3])//3
Math.min.apply (Math, [1,2,3])//1
(Originating from http://ejohn.org/blog/fast-javascript-maxmin/)
11. Conditional Judgment:
var a = b && 1;
Equivalent
if (b) {
A = 1
}
var a = B | | 1;
Equivalent
if (b) {
A = b;
} else {
A = 1;
}
12. Determine IE:
var ie =/* @cc_on!@*/false;
Do you have any more? Welcome to the response