I’m adding iOS support to an Ember application which uses Flame.js. Most Flame.js widgets don’t have built-in support for touch events at the moment, so I’m working on adding it to the ones I need. I’ve got touchStart and touchEnd working just fine for clicking and certain state transi…
Tag: javascript
What’s the fastest way to convert String to Number in JavaScript?
Any number, it’s number. String looks like a number, it’s number. Everything else, it goes NaN. Answer There are 4 ways to do it as far as I know. By this quick test I made, it actually depends on browsers. https://jsben.ch/NnBKM Implicit marked the fastest on 3 browsers, but it makes the code har…
Multiple populates – mongoosejs
Just a simple query, for example with a double ref in the model. Schema / Model Query I already tried something like In fact only one of the populates works. So, how do is get two populates working ? Answer You’re already using the correct syntax of: Perhaps the meal ObjectId from the order isn’t …
File API – Blob to JSON
I’m trying to do some experiment with HTML5, WebSocket and File API. I’m using the Tomcat7 WebSocket implementation. I’m able to send and received text messages from the servlet. What I want to do now is to send from the servlet to the client JSON objects, but I want to avoid text message in…
How to show setCustomValidity message/tooltip without submit event
I’m using forms basic validation to check if email is correct format, then the data is sent by Ajax where it checks if email address is already in use and did the user select country/state or left default values in select boxes. But for HTML5 form validation to be done submit event is needed, upon click…
How to get opposite boolean value of variable in Javascript
How to get opposite value of a (false) and vice versa? Answer
Recursive function returns undefined
I have a function which calculates taxes. I can’t see why it doesn’t stop the recursion. Answer In this arm of your function: you are not returning a value from the function or setting returnTax. When you don’t return anything, the return value is undefined. Perhaps, you want this:
Why can I access TypeScript private members when I shouldn’t be able to?
I’m looking at implementation of private members in TypeScript, and I find it a little confusing. Intellisense doesn’t allow to access private member, but in pure JavaScript, it’s all there. This makes me think that TS doesn’t implement private members correctly. Any thoughts? Answer J…
Function in JavaScript that can be called only once
I need to create a function which can be executed only once, in each time after the first it won’t be executed. I know from C++ and Java about static variables that can do the work but I would like to know if there is a more elegant way to do this? Answer If by “won’t be executed” you …
How to convert uint8 Array to base64 Encoded String?
I got a webSocket comunication, I recieve base64 encoded string, convert it to uint8 and work on it, but now I need to send back, I got the uint8 array, and need to convert it to base64 string, so I can send it. How can I make this convertion? Answer All solutions already proposed have severe problems. Some s…