split string in JS by multiple letters

Question

I have a string of letters and I am trying to cut them into an array using split(), but I want it to split for multiple letters. I got it to work for an individual letter:

str = "YFFGRDFDRFFRGGGKBBAKBKBBK";
str.split(/(?<=\R)/); //-> Works for only 'R'
Result->[ 'YFFGR', 'DFDR', 'FFR', 'GGGKBBAKBKBBK' ]

What I want:

str = "YFFGRDFDRFFRGGGKBBAKBKBBK";
letters =['R', 'K', 'A'];
// split by any of the three letters (R,K,A)
Result->[ 'YFFGR', 'DFDR', 'FFR', 'GGGK', 'BBA', 'K', 'BK', 'BBK' ];

fdomn-m · Accepted Answer · 2021-07-12 16:46:21Z

4

You can use "character class" group: [RKA]

Everything you put inside these brackets are alternatives in place of one character.

str = "YFFGRDFDRFFRGGGKBBAKBKBBK";
var result = str.split(/(?<=[RKA])/);

console.log(result);

answered Jul 12, 2021 at 16:46

fdomn-m

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2 Comments

UofF Over a year ago

Is there any way I could substitute RKA with a variable? For example: str.split(/(?<=[letters])/);

fdomn-m Over a year ago

See Using a variable in a javascript regex str = "YFFGRDFDRFFRGGGKBBAKBKBBK"; letters = "RKA"; re = new RegExp("(?<=[" + letters + "])"); str.split(re);

Nina Scholz · Accepted Answer · 2021-07-12 16:57:44Z

4

Beside splitting, you could match non ending characters with a single any character sign.

const
    str = "YFFGRDFDRFFRGGGKBBAKBKBBK",
    result = str.match(/[^RKA]*./g);

console.log(result);

answered Jul 12, 2021 at 16:57

Nina Scholz

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Comments

Boris Volkovich · Accepted Answer · 2021-07-12 16:50:53Z

0

You can pass regex in split

"YFFGRDFDRFFRGGGKBBAKBKBBK".split(/[RKA]+/);

answered Jul 12, 2021 at 16:50

Boris Volkovich

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1 Comment

fdomn-m Over a year ago

OP is already passing a regex in the split str.split(/(?<=\R)/); - they're trying to find which regex will match they're requirement. Which is: /(?<=[RKA])/

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