I'm working with an array that contains variables which may change position, and I need to create a for loop to check if the length of a specific variable is zero. Instead of targeting the variable's position in the array (which could change), I would like to know if there is a way to access a variable by its name within the array.
If you're looking for a solution, consider using a dictionary.
var myDict = {a:"apple", b:"banana", c: ""}
//check length
for (key in myDict.keys()) {
if (len(myDict[key]) == 0) {
//Perform an action
}
}
Assign your values to variables with corresponding keys, and then assess the length of each value for each key.
Usually, arrays store their data using numerical indexes such as 0, 1, 2, n. However, to store variables in an Object, you can use keys and access the variables using those keys like this:
var info = {keyName: value1, keyName2: value2};
info['keyName'] = //perform your action
If you want to access data dynamically, you can do so using JavaScript.
var profDetails = {title:"professor", subject: "math" };
var t1="title";
var t2="subject";
console.log(profDetails[t1]); //outputs professor
console.log(profDetails[t2]); //outputs math
Object.getOwnPropertyNames() is a method that retrieves an array containing strings representing the enumerable and non-enumerable properties directly found on an object.
// Example with Array-like object
var obj = { 0: 'a', 1: 'b', 2: 'c' };
print(Object.getOwnPropertyNames(obj).sort()); // Output: '0,1,2'
var arr = ['a', 'b', 'c'];
print(Object.getOwnPropertyNames(arr).sort()); // Output: '0,1,2,length'
// Displaying property names and values using Array.forEach
Object.getOwnPropertyNames(obj).forEach(function(val, idx, array) {
print(val + ' -> ' + obj[val]);
});
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