How compare third one in each array in each line?

Question

If I have two array

A = [ "B,C,D"
      "W,F,G"
      "M,S,E"
    ]
D = [E]

and want to compare D OR G with E (I mean the third one in each line)and If they are equal can show all the line for me. The third one in each line a part of each line and I want just compare the third one If it is equal show that line have equal variable . I wrote this code but didn't give me the response that I need have :

 for(var k=0 ; k<A.length ; k++){
    if(A[k].split(",")[2] === E) {
       finalSuccessServices = A;
       console.log(finalSuccessServices );
     }

How can I improve my code to get that line that have my equal variable?

what is E? Why are you setting finalSuccessServices = A, when A never changes anyways? Did you mean A[k]? — ASDFGerte
– ASDFGerte, Commented Feb 18, 2020 at 15:54

Addis · Accepted Answer · 2020-02-18 15:59:15Z

1

You can use find() to get the matching string, provided you have a single match:

const A = [ "B,C,D",
      "W,F,G",
      "M,S,E"
    ];
const D = ['E'];

let result = A.find(str => str.split(',')[2] === D[0]);

console.log(result)

answered Feb 18, 2020 at 15:59

Addis

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Comments

Nina Scholz · Accepted Answer · 2020-02-18 15:58:54Z

0

You could filter the array and have a look up with includes.

var array = ["B,C,D", "W,F,G", "M,S,E"],
    pattern = ['E'],
    result = array.filter(s => pattern.includes(s.split(',')[2]));

console.log(result);

If you need only the first one, take find.

var array = ["B,C,D", "W,F,G", "M,S,E"],
    pattern = ['E'],
    result = array.find(s => pattern.includes(s.split(',')[2]));

console.log(result);

answered Feb 18, 2020 at 15:58

Nina Scholz

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12 Comments

faezanehhabib Over a year ago

what's the meaning of s => pattern.includes(s.split(',')[2])

faezanehhabib Over a year ago

when You use s=> what is the meaning ?

Nina Scholz Over a year ago

it's an arrow function, a short form of function () {} with some special features.

faezanehhabib Over a year ago

Thanks a lot for your help

faezanehhabib Over a year ago

It is makesense for if not equal yes ?

|

Ele · Accepted Answer · 2020-02-18 16:00:50Z

0

You can use the function filter along with the function includes in order to select those lines which have a third letter within the array D.

let A = [ "B,C,D", "W,F,G", "M,S,E" ],
    D = ["E"],
    result = A.filter(s => {
      let [,,C] = s.split(",");
      return D.includes(C);
    });
    
console.log(result);

answered Feb 18, 2020 at 16:00

Ele

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Comments

Siva Kondapi Venkata · Accepted Answer · 2020-02-18 16:18:36Z

0

Use split and destructure to get third element
Compare third value and first (from array D)
Console log and push to finalSuccessServices array.

const A = ["B,C,D", "W,F,G", "M,S,E"];
const D = ["E"];

const [first] = D;
const finalSuccessServices = [];
A.forEach(line => {
  const [,, third] = line.split(",");
  if (third === first) {
    console.log(line);
    finalSuccessServices.push(line);
  }
});

console.log("finalSuccessServices", finalSuccessServices);

answered Feb 18, 2020 at 16:18

Siva Kondapi Venkata

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