I would like to loop through an array and get the key and value of it. This is what I'm doing, but I don't get any output. What am I doing wrong?
let regexes = [];
regexes['some.thing'] = /([^.]+)[.\s]*/g;
_.each(regexes, function(regex, key) {
console.log(regex, key);
});
You are using array and adding a property to it which is not valid .Use object for it
let regexes = {};
regexes['some.thing'] = /([^.]+)[.\s]*/g;
_.each(regexes, function(regex, key) {
console.log(regex, key);
});
_.each iterates through the indices of the array. You are adding a non-numeric property to the array object. Your array is empty and _.each callback is not executed. It seems you want to use a regular object ({}) and not an array:
let regexes = {};
Now _.each should iterate through the object own (by using hasOwnProperty method) properties.
You are assigning a property to the array. Lodash is attempting to iterate through the numeric indices of the array, but there are none. Change the array to an object and Lodash will iterate through its enumerable properties:
let regexes = {};
regexes['some.thing'] = /([^.]+)[.\s]*/g;
_.forEach(regexes, function(regex, key) {
console.log(regex, key);
});
Alternatively, if using an array is necessary, simply push the value onto it:
let regexes = [];
regexes.push(/([^.]+)[.\s]*/g);
_.forEach(regexes, function(regex, i) {
console.log(regex, i);
});
for(var key in yourObjectOrArrayLike){console.log(key + ' - ' + yourObjectOrArrayLike[key]);}.