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rated 0 times [  86] [ 1]  / answers: 1 / hits: 32055  / 11 Years ago, mon, april 22, 2013, 12:00:00

I have an array of data like this:



var nameInfo  = [{name: Moroni, age: 50},

                 {name: Tiancum, age: 43},

                 {name: Jacob, age: 27},

                 {name: Nephi, age: 29},

                 {name: Enos, age: 34}];


If I have an object like this:



var nameInfo  = {name: Moroni, age: 51};


Is there a simple way that I can update the variable nameInfo. The key
between these is the name column. I know there is a way that I could
do this by searching for the row, removing and adding but I would like
to have a way to do this where I updated the row. Note that if it helps I do have underscore.js loaded.


More From » underscore.js
 Answers
11

Easiest way is to just loop over and find the one with a matching name then update the age:



var newNameInfo  = {name: Moroni, age: 51};

var name = newNameInfo.name;



for (var i = 0, l = nameInfo.length; i < l; i++) {

    if (nameInfo[i].name === name) {

        nameInfo[i].age = newNameInfo.age;

        break;

    }

}


JSFiddle Example



Using underscore you can use the _.find method to do the following instead of the for loop:



var match = _.find(nameInfo, function(item) { return item.name === name })

if (match) {

    match.age = newNameInfo.age;

}


JSFiddle Example


[#78720] Sunday, April 21, 2013, 11 Years  [reply] [flag answer]
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