This might seems silly, but I'm trying it from long time.
var parentArray = [
[0.49988811188811194, 0.17249417249417248],
[0.8181398601398602, null],
[0.8181398601398602, 0.47785547785547783],
[0.49988811188811194, 0.47785547785547783]
];
function containsNull(arr) {
return (function() {
return arr.filter(e => {
if(e.some(el => el == null)) return true
})
})();
}
console.log("-->", containsNull(parentArray))here I'm getting output as
> "-->" Array [Array [0.8181398601398602, null]]
but I don't need the array as return value. I just want true or false that's all.
i.e,
"-->" true
How to achieve this? even using load-ash library is good to go!
You can use some with includes
var parentArray = [
[0.49988811188811194, 0.17249417249417248],
[0.8181398601398602, null],
[0.8181398601398602, 0.47785547785547783],
[0.49988811188811194, 0.47785547785547783],
];
const result = parentArray.some((a) => a.includes(null));
console.log(result);It seems that you are using a multidimensional array, so you could just flatten it with Array.prototype.flat and use Array.prototype.includes to check if the flattened array contains null.
let parentArray = [
[0.49988811188811194, 0.17249417249417248],
[0.8181398601398602, null],
[0.8181398601398602, 0.47785547785547783],
[0.49988811188811194, 0.47785547785547783]
];
const containsNull = (arr) => arr.flat().includes(null)
console.log(containsNull(parentArray))The following would flatten arrays of n-dimensions and check if it contains null:
function flatten(arr) {
return arr.reduce(function (flat, toFlatten) {
return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten);
}, []);
}
let parentArray = [
[[[[0.49988811188811194, 0.17249417249417248]]],
[0.8181398601398602, null],
[0.8181398601398602, 0.47785547785547783]],
[0.49988811188811194, 0.47785547785547783]
];
const containsNull = (arr) => flatten(arr).includes(null)
console.log(containsNull(parentArray))Use Array.some() method on both parent and child array.
var parentArray = [
[0.49988811188811194, 0.17249417249417248],
[0.8181398601398602, null],
[0.8181398601398602, 0.47785547785547783],
[0.49988811188811194, 0.47785547785547783]
];
function containsNull(arr) {
return arr.some(list => list.some(ele => !ele))
}
console.log(containsNull(parentArray));