How to Iterate Through an Array of Objects Using JavaScript
November 3, 2018
Suppose you have an array of objects.
JavaScript
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var zipCodes = [2
{"ZIP": 30001, "LAT": 30.750633, "LNG": -63.997177}, 3
{"ZIP": 10001, "LAT": 40.750633, "LNG": -73.997177 },4
{"ZIP": 20001, "LAT": 50.750633, "LNG": -83.997177 }];If you want to grab only the LAT and LNG values for a matching ZIP (as the key), you can easily use the for loop:
JavaScript
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var key = 10001; //the zip code you want to search2
var lng, lat;3
for(var i=0; i < zipCodes.length; i++){4
if(zipCodes[i].ZIP == key){5
lat = zipCodes[i].LAT;6
lng = zipCodes[i].LNG;7
break;8
}9
}However, if you just want to loop through the entire array and print them out, you could use the object.forEach() method:
JavaScript
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zipCodes.forEach(function(item,index){2
lat = item.LAT;3
lng = item.LNG;4
});You can try running the code here:
