I\'m having a hard time figuring out how to move an array element. For example, given the following:
var arr = [ \'a\', \'b\', \'c\', \'d\', \'e\'];
<
I've implemented an immutable ECMAScript 6
solution based off of @Merc
's answer over here:
const moveItemInArrayFromIndexToIndex = (array, fromIndex, toIndex) => {
if (fromIndex === toIndex) return array;
const newArray = [...array];
const target = newArray[fromIndex];
const inc = toIndex < fromIndex ? -1 : 1;
for (let i = fromIndex; i !== toIndex; i += inc) {
newArray[i] = newArray[i + inc];
}
newArray[toIndex] = target;
return newArray;
};
The variable names can be shortened, just used long ones so that the code can explain itself.