CODEWITHSUNDEEP
javascriptarraysstring
Piikaa
Piikaa

Reputation: 69

get pairs of string from a string

I want from this string :

'Paris , Bruxelles , Amsterdam , Berlin'

Get this result in an array :

['Paris_Bruxelles' , 'Bruxelles_Amsterdam' , 'Amsterdam_Berlin' ]

Can anyone help me please ?

Upvotes: 1

Views: 61

Answers (2)

Redu
Redu

Reputation: 26181

Basically in functional languages you are expected to use a zipWith function, where the accepted answer mimics that in JS with side effects.

However you may also mimic Haskell's pattern matching in JS and come up with a recursive solution without any side effects

var cities = "Paris , Bruxelles , Amsterdam , Berlin , Bayburt".split(/\s*,\s*/),
    pairs  = ([f,s,...rest]) => s == void 0 ? []
                                            : [f + "_" + s].concat(pairs([s,...rest]));

console.log(pairs(cities));

Upvotes: 0

Nina Scholz
Nina Scholz

Reputation: 386660

You could split the string and slice the array and get the pairs.

var string = 'Paris , Bruxelles , Amsterdam , Berlin',
    array = string.split(/\s*,\s*/),
    result = array.slice(1).map((s, i) => [array[i], s].join('_'));

console.log(result);

Upvotes: 3

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