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I have an array. I want to add some characters (:,\n) to each element in that array to be shown in a text box.

Currently this is what I'm doing

$scope.source.arr = .... //This is an array
var actualText = "";

function func() {
    $scope.source.arr.forEach(function(ele){
        actualText += "***" + ele + " - \n"; //Adding necessary characters
    })
}

var showText = function() {
    func(); //Calling the function that populates the text as needed
    var textBox = {
          text : actualText; 
          ...
     }
}

Is there a better way to do this?

I have an array. I want to add some characters (:,\n) to each element in that array to be shown in a text box.

Currently this is what I'm doing

$scope.source.arr = .... //This is an array
var actualText = "";

function func() {
    $scope.source.arr.forEach(function(ele){
        actualText += "***" + ele + " - \n"; //Adding necessary characters
    })
}

var showText = function() {
    func(); //Calling the function that populates the text as needed
    var textBox = {
          text : actualText; 
          ...
     }
}

Is there a better way to do this?

• javascript
• arrays

Share Improve this question Follow edited Jan 13, 2016 at 4:49 thefourtheye 240k5353 gold badges465465 silver badges500500 bronze badges asked Jan 13, 2016 at 4:46 ThiyaguThiyagu 17.9k55 gold badges4848 silver badges8686 bronze badges 0

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2 Answers 2

Sorted by: Reset to default 11

You can simply use Array.prototype.map to create a new Array object with the changed strings, like this

var textBox = {
      text: $scope.source.arr.map(function(ele) {
          return "***" + ele + " -  ";
      }).join("\n"),
      ...
 };

For each element in the arr, we are creating a new string corresponding to it and creating an array of strings. Finally we join all the strings in the array with \n.

You can use Array.prototype.map, Array.prototype.reduce to make it better.

Check reduce function here https://developer.mozilla/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

var prefix = "***";
var postfix = "$$$";

var targetStrArr = ["apple", "banana"]

var resultStr = targetStrArr.map(function(ele){
    return prefix + ele + postfix; //Adding necessary characters
}).reduce(function(prevVal, curVal) {
    return prevVal + curVal;
});

console.log(resultStr); // ***apple$$$***banana$$$

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