Javascript - Match (and replace) value to array of array

Question

After parsing values through Ajax request (GET), I need to replace them with other values -> i.e. multiple postal codes corresponding to the same country code ( "1991,1282,6456" : "Idaho", etc. )

This is what I've done so far :

$mapCodes = {
  '1991': 'Idaho',
  '1282': 'Idaho',
  '5555': 'Kentucky',
  '7777': 'Kentucky '
}
var region = value.groupid.replace(/7777|5555|1282|1991/, function(matched) {
  return $mapCodes[matched];
});
console.log(region);

This works, but I'd rather avoid setting my $mapCodes variable as a long list of values repeated.

I need something like and array of array to whitch make the match (and then the replacement)

$mapCodes = {
'1991,1282' : 'Idaho',
'7777,5555' : 'Kentycky'
}

Please fix the snippet I made to reflect the actual code you have - there is not value.groupid defined. I also added a quote and a comma to the invalid object — mplungjan
– mplungjan, Commented Dec 20, 2018 at 9:09
What exactly are you worried about? Is the issue that you want to write non-repetitive code, or are you thinking about performance? — CertainPerformance
– CertainPerformance, Commented Dec 20, 2018 at 9:09
Turn them around: "Kentucky": [7777,5555] and look them up using value search — mplungjan
– mplungjan, Commented Dec 20, 2018 at 9:12

mudin · Accepted Answer · 2018-12-20 09:28:01Z

2

You need to use array which elements are $mapCodes's keys:

{
  "Idaho":[1991,1282]
}

Here is the demo:

$mapCodes = {
  "Idaho":['1991','1282'],
  "Kentucky":['5555','7777']
}
var test="1991 7777 1282";  /// input string
var region = test; // result string
for(let key in $mapCodes){
  let a =$mapCodes[key];
  for(let i=0; i<a.length; i++) {
    region = region.replace(a[i],key);
  }
}
console.log(region);

answered Dec 20, 2018 at 9:28

mudin

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1 Comment

Italo Over a year ago

This work perfectly indeed. Thanks you all and apologise for my mistakes in the post, is my first time :D

Guilherme Lemmi · Accepted Answer · 2018-12-20 10:29:29Z

0

imudin07 already answered correctly and with easier-to-read code, but just out of curiosity, here's another possibility, using modern JS syntax and array methods map, reduce and some.

var mapCodes = {
  "Idaho": ['1991', '1282'],
  "Kentucky": ['5555', '7777']
};
var input = "1991 7777 1282 9999";
var result = input.split(' ').map((inputCode) => (
  Object.keys(mapCodes).reduce((matchingState, curState) => (
    matchingState || (mapCodes[curState].some((code) => code === inputCode) ? curState : false)
  ), false) || inputCode
)).join(' ');
console.log(result);

edited Dec 20, 2018 at 10:29

answered Dec 20, 2018 at 10:20

Guilherme Lemmi

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