How to split and modify a string in NodeJS

Question

I have a string    var str    123  124  234 252     I want to parse each item after split and increment 1  So I will have   var arr    124  125  235  253      How can I do that in NodeJS

User · Answer

var str    123  124  234 252   var arr   str split       for var i 0 i lt arr length i          arr i      arr i

User · Answer

Use split and map function   var str    123  124  234 252   var arr   str split       arr   arr map function  val    return  val   1        Notice  val - string is casted to a number   Or shorter   var str    123  124  234 252   var arr   str split      map function  val    return  val   1        edit 2015 07 29  Today I d advise against using   operator to cast variable to a number  Instead I d go with a more explicit but also more readable Number call    x000D   x000D  var str    123  124  234 252   x000D  var arr   str split      map function  val    x000D    return Number val    1  x000D      x000D  console log arr   x000D   x000D   x000D    edit 2017 03 09  ECMAScript 2015 introduced arrow function so it could be used instead to make the code more concise    x000D   x000D  var str    123  124  234 252   x000D  var arr   str split      map val   gt  Number val    1   x000D  console log arr   x000D   x000D   x000D

User · Answer

If you re using lodash and in the mood for a too-cute-for-its-own-good one-liner     map   words  123  124  234 252      add bind 1  1      It s surprisingly robust thanks to lodash s powerful parsing capabilities   If you want one that will also clean non-digit characters out of the string  and is easier to follow   and not quite so cutesy      chain  123  124  234 252  n301       replace     d   g          words       map   partial   add  1       value      2017 edit   I no longer recommend my previous solution  Besides being overkill and already easy to do without a third-party library  it makes use of   chain  which has a variety of issues  Here s the solution I would now recommend   const str    123  124  234 252   const arr   str split      map n   gt  parseInt n  10    1     My old answer is still correct  so I ll leave it for the record  but there s no need to use it nowadays

[javascript] How to split and modify a string in NodeJS?

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