Understanding Javascript array output / Breaking down URL hash parameters

Currently, I am working on extracting a single value from a URL String that contains three variables. The code snippet I am using for this task is as follows:

var hash_array = location.hash.substring(1).split('&');
var hash_key_val = new Array(hash_array.length);

for (var i = 0; i < hash_array.length; i++) {
hash_key_val[i] = hash_array[i].split('=');
var array = hash_key_val[i];
console.log(array);
}

While this code successfully extracts the hash, it separates each item and its corresponding value into different arrays like below:

["object1", "value1"]
["object2", "value2"]
["object3", "value3"]

To obtain only the value, I modified the array to

var x = JSON.stringify(array[1]);

Even though this modification allows me to get the value, I actually only need the first value. However, the current code still returns:

"value1"
"value2"
"value3"

I am looking for suggestions on how I can tweak the code so that it outputs just value1.

Appreciate any help!

Answer №1

Remember, arrays start at zero index so the first element is actually at index 0. Also, make sure you are aware that you are looping over the values as you print them out.

var arr = [
  ["object1", "value1"],
  ["object2", "value2"],
  ["object3", "value3"]
];

console.log(arr[0][1]);

Answer №2

Arrow made a great point about adjusting the index in which you access array from 1 to 0.

Another suggestion is to consider using the map function:

var keys = hash_array.map(function(param){
    return JSON.stringify(param.split('=')[0]);
}

This would result in keys being

["object1", "object2", "object3"]

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