Convert True->1 and False->0 in Javascript?
JavascriptJavascript Problem Overview
Besides :
true ? 1 : 0
is there any short trick which can "translate" True->1 and False->0 in Javascript ?
I've searched but couldn't find any alternative
What do you mean by "short trick" ?
answer : same as ~~6.6 is a trick for Math.floor
Javascript Solutions
Solution 1 - Javascript
Lots of ways to do this
// implicit cast
+true; // 1
+false; // 0
// bit shift by zero
true >>> 0; // 1, right zerofill
false >>> 0; // 0
true << 0; // 1, left
false << 0; // 0
// double bitwise NOT
~~true; // 1
~~false; // 0
// bitwise OR ZERO
true | 0; // 1
false | 0; // 0
// bitwise AND ONE
true & 1; // 1
false & 1; // 0
// bitwise XOR ZERO, you can negate with XOR ONE
true ^ 0; // 1
false ^ 0; // 0
// even PLUS ZERO
true + 0; // 1
false + 0; // 0
// and MULTIPLICATION by ONE
true * 1; // 1
false * 1; // 0
You can also use division by 1, true / 1; // 1, but I'd advise avoiding division where possible.
Furthermore, many of the non-unary operators have an assignment version so if you have a variable you want converted, you can do it very quickly.
You can see a comparison of the different methods with this jsperf.
Solution 2 - Javascript
Here is a more logical way Number()
Number(true) // = 1
Number(false) // = 0
Solution 3 - Javascript
...or you can use +true and +false
Solution 4 - Javascript
You can use ~~boolean, where boolean is (obviously) a boolean.
~~true // 1
~~false // 0