Typescript: concate all the elements in an string array

Question

I have an array of string:

public scene: Array<string> = ['gittare','saxsophone','drum'];

I need to concatenate all the string in the array like 'gittare_saxsophone_drum' . Here is my solution in recursive way:

addressCreator(array:Array<string>){


      if(array.length>0)
           var fileName=array[0]+"_"+this.addressCreator(array); 
      else
          return [];
      return fileName;
  }

The none recursive approach could be:

addressCreator(array:Array<string>){

      array.splice(0,1);
      for(let e of array)
           var fileName=e+"_"+fileName; 

      return fileName;
  }

In both of these solutions, i nused var which shouldn't be used in functional programming.

So what is the best approach?

I cannot see why you are using splice, as splice removes an element from your parameter. This is more of a problem in functional programming as this makes your function a non pure one. After you called your function, your array will be empty and that could have quite some repercussions in other parts of your code — Icepickle
– Icepickle, Commented Dec 18, 2016 at 12:57
I suggest you read through the documentation pages on arrays so you know what features and methods are available to you. — user663031
– user663031, Commented Dec 18, 2016 at 15:56

toskv · Accepted Answer · 2016-12-18 15:10:13Z

3

You can just use the join method for that.

let x = scene.join("_");

edited Dec 18, 2016 at 15:10

answered Dec 18, 2016 at 12:51

toskv

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