Comparing 2 arrays for at least 3 similarities

Question

So I want to compare 2 arrays with each other to count the similarities that they have.

[ 401, 271, 259, 260, 342, 410 ]

[ 401, 12021, 923, 235, 342, 410 ]

The above arrays should output 3. Right now I have a forEach inside a forEach just going through each one individually to check the other array individually for the same number.

Can you show your forEach attempt? – Kinglish Feb 08 '22 at 19:15 — Kinglish, Feb 08 '22 at 19:15

score 0 · Accepted Answer · answered Feb 08 '22 at 19:19

0

you can use the Array.reduce() method

const a = [ 401, 271, 259, 260, 342, 410 ]

const b = [ 401, 12021, 923, 235, 342, 410 ]


console.log(a.reduce((acc,curr, i)=>{
    if(curr==b[i]) acc+=1
    return acc
},0));

answered Feb 08 '22 at 19:19

MWO

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This worked thank you! – WeLoki1 Feb 08 '22 at 19:28

Comparing 2 arrays for at least 3 similarities

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