I am trying to create a PDF from my HTML using pdfMake and Angular (I’ve also tried jsPDF and couldn’t get it to work either). I tried using the following code in my Angular controller: but I receive the following error: Unrecognized document structure: {“_margin”:null}”. My HTML…
Author: admin@master
Checking if a Binary Search Tree is Valid javascript
I came across this problem online and I found the following function to check if a BST is valid. However, what I don’t fully understand is how max/min change from null to values that you can compare against. so in the following function: when you come back up from the lowest depth on the left it compare…
JavaScript not able to enable button due to condition
I have a pure JS below which is not working as it have to meet the conditions then the button would be enabled. It’s able to work on jsfiddle but just not in codes. I remove the other condition to test what’s wrong. Am I missing something here? JS: HTML: Answer It’s able to work on jsfiddle …
Typescript – TypeError myclass.myFunction is not a function
I’m facing an issue with the following code. What it basically should do. It should load and parse a given JSON file. And in the RequestListender it should show the ID and the string Hello which is returned by the ToString() method in Product.ts. Where the tProduct.Id is shows up correctly, the tProduct…
Time conversion Not working properly?
I am using the ionic time picker in my project. When I select the time picker it passes a value to the controller. For example when I select 09:00pm, the console shows 79200. If I select 07:00pm the console shows 68400. I want to convert the value to 12 hrs format. I have followed some steps, but it’s n…
Can’t type in React input text field
I’m trying my first bit of React.js and am stumped early on… I have the code below, which renders a search form into <div id=”search”></div>. But typing in the search box does nothing. Presumably something is going missing passing the props and state up and down, and this s…
react componentDidMount not firing
I set up a new react project and for some reason, the componentDidMount method is not being called. I have verified this behavior by placing a call to console.log in componentDidMount but I cannot see its output in the console. Furthermore, this.setState() is not working. I’m pretty stumped as to why th…
How to get around the FormSpree redirect?
I got my website over on the Github Pages Service. I’m trying to implement the FormSpree free contact form but after you submit the form, it redirects you to a different website. Something I’d like to avoid. So I looked it up on the internet and of course others wanted to get rid of it too (I omit…
Explain how recursion works in an algorithm to determine depth of binary tree?
I am new to data structures in JavaScript and am trying to learn Binary Search Trees. I was following along with a blog post and was able to get a working solution to the problem of finding the max depth in a BST, but it’s unclear to me how the recursion is working and how the +1 gets added on
React: “this” is undefined inside a component function
I want to update loopActive state on toggle, but this object is undefined in the handler. According to the tutorial doc, I this should refer to the component. Am I missing something? Answer ES6 React.Component doesn’t auto bind methods to itself. You need to bind them yourself in constructor. Like this: