JavaScript Kinky Tricks

1. Turn the rounding into a numerical type:

1     console.log ("10.340" |);    102     Console.log ("10.560" ^0);    103     Console.log ( -2.25|0);       -24     Console.log (~~-2.25);       -2

2. Date to Value:

    var d = +new Date ();        1499149610813

3. Random Code:

1 Math.random (). toString (+). substring (2);        14-bit: adfe8d8800e042 math.random (). ToString ($). substring (2);        11-bit: Yc290rtrpij

4. Exchange value:

1 a= [B, b=a][0];

5. Condition Judgment:

1     var a = b && 1; 2     //equivalent to 3     if (b) {4         a = 1    } 6  7     var a = B | | 1; 8     //equivalent to 9     if (b) A = b;10 else a = 1;    

6. Empty the array:

1     arr.length=0;        Set array length empty array

7. Force the Boolean value:

1 var a= ""; 2!! A;            Double exclamation points to really convert the variable to the corresponding Boolean value, the first exclamation point is converted to a Boolean value, but this operation gets its inverse value, and then take the inverse operation to get its corresponding true Boolean value

8. Application of the displacement character:

1 var num = >> 1; Equivalent to 10/2, but more efficient 2 console.log (num)//5;3 4 var num = 2 << 3; 2 of Four Square 5 console.log (num)//16;

JavaScript Kinky Tricks