Creating various arrays from a string using LOOPS

Question

I have a string of values

"000111111122222223333333444455556666"

How could I use a loop to produce one array for index values from 0 to 3 (create an array of [000] and then another array of index values from 3 to 10, 10 to 17, 17 to 24, producing eg. [1111111, 2222222, 333333] and then another loop to produce an array of index values from 24 to 28, 28 to 32, 32 to 36, producing eg. [4444, 5555, 6666])?

So in total 3 different arrays have been created using three different for loops.

array1 = [000]
array2 = [1111111, 2222222, 333333]
array3 = [4444, 5555, 6666]

if I understand correctly you want to separate value by their quantity in the string ? What would be the expected output from 0112, 01100 and 0110 — jonatjano
– jonatjano, Commented Aug 20, 2018 at 12:50
Please provide your desired output, from what you've written it's a bit hard to tell what you want for the final outcome — George
– George, Commented Aug 20, 2018 at 12:54
what is with your last question? stackoverflow.com/questions/51910212/… — Nina Scholz
– Nina Scholz, Commented Aug 20, 2018 at 12:56
@NinaScholz even if it is REALLY close it is not exactly the same, this time he want to output differents array, maybe with not defined size for each parts — jonatjano
– jonatjano, Commented Aug 20, 2018 at 12:57

FDavidov · Accepted Answer · 2018-08-20 12:59:56Z

0

You may wish to try something line this (only a schematic solution!):

var l_Input = "000111111122222223333333444455556666" ;

var l_Array_1 = [] ;
var l_Array_2 = [] ;
var l_Array_3 = [] ;


var l_One_Char ;

for (var i = 0 ; i < l_Input.length ; i++) {

    l_One_Char = l_Input.substring(i,i) ;

    if (i < 3) {
        l_Array_1.push(l_One_Char) ;
        continue ;
    }

    if (i >= 3 && i < 10) {
        l_Array_2.push(l_One_Char) ;
        continue ;
    }
    :
    :

}

answered Aug 20, 2018 at 12:59

FDavidov

3,7556 gold badges27 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sina Mirhejazi · Accepted Answer · 2018-08-20 13:02:47Z

0

I think this would work.

const str = '000111111122222223333333444455556666';

function makeArr(str, item) {
    let firstIndex = str.indexOf(item);
    let lastIndex = str.lastIndexOf(item) + 1;
    return [ str.substring(firstIndex, lastIndex) ];
}

const first = makeArr(str, 0);
const second = [].concat(makeArr(str, 1))
                 .concat(makeArr(str, 2))
                 .concat(makeArr(str, 3));
const third = [].concat(makeArr(str, 4))
                .concat(makeArr(str, 3))
                .concat(makeArr(str, 3));

answered Aug 20, 2018 at 13:02

Sina Mirhejazi

3223 silver badges17 bronze badges

Comments

Nina Scholz · Accepted Answer · 2018-08-20 13:02:59Z

0

You could map the sub strings.

var str = '000111111122222223333333444455556666',
    parts = [[3], [7, 7, 7], [4, 4, 4]],
    result = parts.map((i => a => a.map(l => str.slice(i, i += l)))(0));

console.log(result);

answered Aug 20, 2018 at 13:02

Nina Scholz

388k26 gold badges367 silver badges417 bronze badges

Comments

Tobiq · Accepted Answer · 2018-08-20 13:05:50Z

0

function split(string, start, end) {
    var result = [],
        substring = string[start],
        split;

    for (var i = start + 1; i < end; i++) {
        var char = string[i];
        if (char === substring[0])
            substring += char;
        else {
            result.push(substring);
            substring = char;
        }
    }
    result.push(substring);
    return result;
}

split("00011122",0,8)

["000", "111", "22"]

answered Aug 20, 2018 at 13:05

Tobiq

2,6972 gold badges24 silver badges48 bronze badges

Comments

cнŝdk · Accepted Answer · 2018-08-20 13:31:53Z

To do this dynamically, you can use .split() and .map() methods to make an array from your string then group this array items by value.

This is how should be our code:

const str = "000111111122222223333333444455556666";

var groupArrayByValues = function(arr) {
  return arr.reduce(function(a, x) {
    (a[x] = a[x] || []).push(x);
    return a;
  }, []);
};

var arr = str.split("").map(v => +v);
var result = groupArrayByValues(arr);

This will give you an array of separate arrays with similar values each.

Demo:

const str = "000111111122222223333333444455556666";

var groupArrayByValues = function(arr) {
  return arr.reduce(function(a, x) {
    (a[x] = a[x] || []).push(x);
    return a;
  }, []);
};

var arr = str.split("").map(v => +v);
var result = groupArrayByValues(arr);


console.log(result);

Collectives™ on Stack Overflow

Creating various arrays from a string using LOOPS

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related