I've an array of objects with the following format [{'list': 'one', 'item': 1}, {'list': 'one', 'item': 2}, {'list': 'one', 'item': 3}, {'list': 'two', &...
I'm trying to use an array.some function to iterate through some data and return my field if the if statement succeeds. What I am finding is happening instead, is that I am getting a boolean return e.g true instead of the actual variable (which...
The following code: let myArray = Array.apply(null, {length: 10}).map(Number.call, Number); Creates the following Array: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] I just don't understand why. I can't find anything on the internet that explains th...
I have [3, 16, 120]. when I do [3, 16, 120].map(mapper), I want to achieve, for example [4,5, 17,18, 121,122] i.e. each element map to n+1 and n+2. This is of course an example - what I want is to simply push multiple values from mapper function D...
This is going to be a bit lengthy, but I'm looking for help as to how to tackle/think through this. I want to get into the habit of thinking critically with this problem, but I've hit a wall. So any tricks/tips/advice are appreciated. So I h...
Looking at the map function in JavaScript, what am I doing wrong here? // input: [{name: "Kevin"}, {name: "Bob"}]; // output: [{"Kevin" : 0}, {"Bob" : 1}]; var map = function(arr, property) { var i = 0;...
What would be the equivalent of this without using a for loop? Unsure what array method to use function func(x){ var y = []; for(i=0;i<x.length;i++){ y.push(x[i]); y.push(x[i]); } return y; } var input = [1,2,3,4...
I have been desperately trying to make a call to the "Feature" model before moving to (if(serviceExists===undefined)) line as shown below but to no avail. I thought async await was the way to go but it doesn't help either. I have tried p...
I cannot load an image after calling map function: this.rosImgs.push({img: '../imgs/ros_eat.png', id: this.imgId}); getRosette(){ return this.rosImgs.map((obj) => <TouchableHighlight key={obj.id} onPress={() => this.imgCl...
I have a command handler that uses a map with commands assigned from user command folders and a general comm folder. User can add their own commands. the map filters using name inside the file which is also how the call them. How do I make a comparis...
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