My structure looks as follows: Component 3 should display some data depending on state of Component 5. Since props are immutable, I can’t simply save its state in Component 1 and forward it, right? And yes, I’ve read about Redux, but I don’t want to use it. I hope that it’s possible to…
Author: admin@master
Grouping by multiple fields per object
I am trying to determine the best data-type to sort an array of objects, into groups defined by properties. I have an array of objects, like so: I need to group these objects into an arbitrary-defined group. E.g.: Group 1: gender Group 2: age (This can be defined by the server and can change to contain a thir…
Cropping with drawImage not working in Safari
I’m working on some simple image manipulation functions with canvas. The user uploads an image, is able to rotate and crop it and then clicks ok. The image is then split in half with each half drawn mirrored to two canvas elements, like this: Original Mirrored It all works great in Chrome, Firefox, IE a…
Vertically align text inside of the svg circle
I am trying to centre the <text> inside of the <path> element. Path is a circle drawn using @opsb great answer. I can centre the text horizontally using text-anchor=’middle’. Is there a way to centre it Vertically? JSFiddle with the javascript. Answer Svg center text Since svg is respo…
Chosen JS – Add the optgroup to the selected item
I want to find the way to enter the optgroup label into the inserted search-choice item, when the user select a option. With the format [optgroup]-[option]. The problem is that by default there is no a clear way to do it. Any suggestions on how to achieve this behavior? Thank you in advance. This is the defau…
Passing multiple actions to onClick event in a react-bootstrap Button
Consider a react/redux application with react-bootstrap components. This may be a very rookie question, but I am trying to pass multiple actions to a single onClick event on a Button from a react-bootstrap library. How to do this properly? Answer Wrap them in another function:
Multiple schema references in single schema array – mongoose
Can you populate an array in a mongoose schema with references to a few different schema options? To clarify the question a bit, say I have the following schemas: Can I populate the guns array with a bunch of ak47 OR m16? Can I put BOTH in the same guns array? Or does it require a populate ref in the
How to parse given date string using moment.js?
I want the following date string to be formatted using moment.js but it gives invalid date. How to parse it correctly or is there any other way to do so? Answer Just use pattern as second parameter in moment function more here in the docs: http://momentjs.com/docs/#/parsing/string-format/
Failure to call AppRegistry.registerComponent
I created a new project using react-native init Wevaha,after that I excute it work’s properly then I modified sample app based on my requirement again run it works properly but the next time while running the app I am gettingthe error like AppRegistry.registerComponent’ The screen shot attached be…
How to dispatch a Redux action with a timeout?
I have an action that updates the notification state of my application. Usually, this notification will be an error or info of some sort. I need to then dispatch another action after 5 seconds that will return the notification state to the initial one, so no notification. The main reason behind this is to pro…