Replacing switch statements with Object literals @toddmotto. In many programming languages, the switch statement exists - but should it any longer?
What switch does it take input and provide an output, such as code being run. Let’s look at a usual switch statement: It’s similar to if and else statements, but it should evaluate a single value - inside the switch we use a case to evaluate against each value. When you start seeing lots of else if statements, something is likely wrong and generally you shoud use something like switch as it’s more suited for the purpose and intention. Problems with switch Object Literal lookups Summing up. Update the Model on enter key pressed with Angularjs. In angularjs, the ngModel directive is used for setting up a two way data binding between an input element and the underlying model.By default, the model is updated when the input value changes, for example while the user is typing.
Based on your scenario, having the model updated immediately may or may not be desierable.With version 1.3, angularjs introduces the ngModelOptions directive which gives you better control of when / how the model is updated from the view. In my case, I needed to prevent the model from being updated until the user pressed ‘enter’, or until the input element lost focus. The next thing to do is update the model when the ‘enter’ key is pressed.To achieve this, you need control of when the ngModel directive updates the model. Angular directives for Bootstrap. Dependencies This repository contains a set of native AngularJS directives based on Bootstrap's markup and CSS.
Binding in AngularJS works magically.
When an element in the controller changes the view is updated automatically. When an input in the view is updated, the controller value is automatically updated. This is because every time the user interacts with the app, AngularJS automatically runs the $digest() method which automatically updates all bindings.
Setting up a Simple Application with Binding To demonstrate watches I'm going to start with a simple application. AngularJS: $watch, $digest and $apply. While browsing reddit, I read an article I felt over-complicated an explanation of $watch, $digest and $apply, and perhaps gave people a little bit of the wrong idea about what it is.
Banging Your Head Against an AngularJS Issue? Try This. Have you been debugging something that seems trivial in Angular for so long that your face looks like this?
As I’ve gotten a little into AngularJS I’ve been surprised by how often my assumptions about how things will work have turned out to be wrong. When you start to form a basic mental model of how Angular works and you hit your first stumbling block where your model turns out to be incorrect it can be really, really, frustrating. In particular I had one issue that kept cropping up so often I began trying it before running to Google for help if something wasn’t working the way I would have expected (all my views should just magically sync up with what’s on $scope, right?).