Lets say I have an array as follows:
"I", "am", "", "still", "here", "", "man"
and from this I wish to produce the following two arrays:
"I", "am", "still", "here", "man"
0, 1, 3, 4, 6
So, an array without the empty strings, but also an array with the array indexes of the non empty strings. What would be a nice way of producing these two arrays from the first?
UPDATE:
I need the first array intact, after the two arrays are produced.
Loop through the array and check if each element is empty. If it's not, add its position to one array and its value to another array:
var elems, positions
for (var i = 0; i < arr.length; i++){
if (arr[i] != ""){
elems.push(arr[i])
positions.push(i)
}
}
EDIT: This will leave you with 3 arrays (original, elements, positions). If you would rather just modify the original one use arr.filter()
var nonEmptyStrings = [];
var nonEmptyIndices = [];
["I", "am", "", "still", "here", "", "man"].forEach(function (str, i) {
if (str != '') {
nonEmptyStrings.push(str);
nonEmptyIndices.push(i);
}
});
var myArray = ["I", "am", "", "still", "here", "", "man"] ;
var myNewArray = [] ;
var myOldPosition = [] ;
for(var i=0, max = myArray.length ; i < max ; i++){
myArray[i] == '' ? true : myNewArray.push(myArray[i])
myArray[i] == '' ? true : myOldPosition.push(i)
}
console.log(myArray);//["I", "am", "", "still", "here", "", "man"]
console.log(myNewArray) ;//["I", "am", "still", "here", "man"]
console.log(myOldPosition);//[0, 1, 3, 4, 6]
