Filter Array Of Array For Values Inside Nested Array

I'm trying to get my head around this i have an array with nested arrays like so var array = [ [12, 43801309, '21.10.2018 00:00:00', 0.00089, 0.00055, 0.0004], [13, 43801308, '

Solution 1:

If the [index] is always the second element of the array, you can simply check whether the value at index 1 is the desired index.

var array = [
  [12, 43801309, "21.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [13, 43801308, "22.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [34, 43801307, "23.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [234, 43801308, "24.10.2018 00:00:00", 0.00089, 0.00055, 0.0004]
];

var targetIndex = 43801308;

var filtered = array.filter(val => val[1] === targetIndex);

console.log(filtered);

Solution 2:

You can customize your filter condition

if(c.indexOf(43801308) > -1 if no check index

if(c[1] == 43801308) if check index 1

let data = [
  [12, 43801309, "21.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [13, 43801308, "22.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [34, 43801307, "23.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [234, 43801308, "24.10.2018 00:00:00", 0.00089, 0.00055, 0.0004]
];

let result = data.filter(c=> { if(c.indexOf(43801308) > -1) return c;});
console.log(result);

let data = [
  [12, 43801309, "21.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [13, 43801308, "22.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [34, 43801307, "23.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [234, 43801308, "24.10.2018 00:00:00", 0.00089, 0.00055, 0.0004]
];

let result = data.filter(c=> { if(c.indexOf(43801308) > -1) return c;});

//if only need index 1
result = data.filter(c=> { if(c[1] == 43801308) return c;});

console.log(result);

Solution 3:

array.filter(function(arr) {
    return arr[1] === value;
}

This should solve your problem. You don't seem to want to filter the nested array, but rather choose the ones where a value is included.

Solution 4:

You don't want to filter twice. What you really want to achieve is filter rows that match a certain condition, in your case, the condition is row[1] === lookupVal.

const array = [
  [12, 43801309, "21.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [13, 43801308, "22.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [34, 43801307, "23.10.2018 00:00:00", 0.00089, 0.00055, 0.0004],
  [234, 43801308, "24.10.2018 00:00:00", 0.00089, 0.00055, 0.0004]
];

const lookupVal = 43801308;
const filterRows = array.filter(row => row[1] === lookupVal);

console.log(filterRows);