how to replace undefined with a empty string

Question

I am using jsPdf. When a field has been left blank "undefined" is printed on the pdf. I would like to replace that with a empty string. I am trying to use a if statement but I am not getting it.

 doc.text(30, 190, "Budget : $");
    if ($scope.currentItem.JobOriginalBudget == "undefined") {

        doc.text(50, 190, " ");
    }
    else {
        var y = '' + $scope.currentItem.JobOriginalBudget;
        doc.text(50, 190, y);
    };

Just do var value = $scope.currentItem.JobOriginalBudget || " "; doc.text(50, 190, value+'') Check for falsy value which could be undefined, "", null, NaN, false, 0 etc.. Or use angular.isUndefined($scope.currentItem.JobOriginalBudget) for specific check, or even angular.isDefined for the opposite of previous — PSL
– PSL, Commented Sep 16, 2014 at 18:52
or expanding on what @PSL shows, create a simple helper function since a PDF likely has numerous of these to do and can write getVal(var) a lot easier than lots of comparisons — charlietfl
– charlietfl, Commented Sep 16, 2014 at 18:57
var y = '' + ($scope.currentItem.JobOriginalBudget || ''); — Jason Goemaat
– Jason Goemaat, Commented Sep 16, 2014 at 20:24

Community · Accepted Answer · 2017-05-23 11:54:59Z

24

As per this answer I believe what you want is

doc.text(50, 190, $scope.currentItem.JobOriginalBudget || " ")

edited May 23, 2017 at 11:54

CommunityBot

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answered Jan 9, 2017 at 12:40

Nuno Costa

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Comments

apsillers · Accepted Answer · 2014-09-16 18:50:03Z

15

undefined is a primitive value. Instead of comparing against the identifier undefined, you're comparing against the 9-character string "undefined".

Simply remove the quotes:

if ($scope.currentItem.JobOriginalBudget == undefined)

Or compare against the typeof result, which is a string:

if (typeof $scope.currentItem.JobOriginalBudget == "undefined")

answered Sep 16, 2014 at 18:50

apsillers

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Comments

Abdullah · Accepted Answer · 2019-05-16 10:07:09Z

3

var ab = {
firstName : undefined,
lastName : undefined
}

let newJSON = JSON.stringify(ab, function (key, value) {return (value === undefined) ? "" : value});

console.log(JSON.parse(newJSON))

<p>
   <b>Before:</b>
   let ab = {
   firstName : undefined,
   lastName : "undefined"
   }
   <br/><br/>
   <b>After:</b>
   View Console
</p>

answered May 16, 2019 at 10:07

Abdullah

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Comments

theDarse · Accepted Answer · 2014-09-17 13:17:54Z

2

simply remove the "== 'undefined'"

if (!$scope.currentItem.JobOriginalBudget) {
    doc.text(50, 190, " ");
}

edited Sep 17, 2014 at 13:17

answered Sep 16, 2014 at 18:51

theDarse

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Comments

Maxime · Accepted Answer · 2019-02-16 22:13:18Z

1

If item is an Object use, this function :

replaceUndefinied(item) {
   var str =  JSON.stringify(item, function (key, value) {return (value === undefined) ? "" : value});
   return JSON.parse(str);
}

answered Feb 16, 2019 at 22:13

Maxime

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Comments

Ruslan Novikov · Accepted Answer · 2022-04-15 10:27:11Z

1

In my case

doc.text(50, 190, $scope.currentItem.JobOriginalBudget??"")

edited Apr 15, 2022 at 10:27

answered Mar 12, 2022 at 18:22

Ruslan Novikov

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