Javascript sort array of objects by a boolean property
To prevent implicit type conversion (which languages like TypeScript don't like), you can use Number() to explicitly convert the boolean to a number:
a = [false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false];
a.sort(function(x, y) {
return Number(x) - Number(y);
});
console.log(a);Or using arrow functions:
a = [false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false];
a.sort((x, y) => Number(x) - Number(y));
console.log(a);a = [false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false];
a.sort(function(x, y) {
// true values first
return (x === y)? 0 : x? -1 : 1;
// false values first
// return (x === y)? 0 : x? 1 : -1;
});
console.log(a);You must return 0 when a and b both have the same value, -1 if a is true and 1 otherwise.