I’m writing a 2D gravity simulation game and I’m trying to add save/load functionality. In the game I store all of the current planets in an array. Each planet is represented by a Body object which contains the coordinates, mass, and motion vector of the planet. It also stores an array of the last…
Author: admin@master
Get name and line of calling function in node.js
How can one get the name and line of a function that called the current one? I would like to have a rudimentary debugging function like this (with npmlog defining log.debug): When called from another function it would be something like this: For clarity, what I want is essentially analogous to this in Python:…
Moment.js – how do I get the number of years since a date, not rounded up?
I’m trying to calculate a person’s age using Moment.js, but I’m finding that the otherwise useful fromNow method rounds up the years. For instance, if today is 12/27/2012 and the person’s birth date is 02/26/1978, moment(“02/26/1978”, “MM/DD/YYYY”).fromNow() ret…
Populating form on keydown ENTER and preventing form from submitting
JS HTML Problem: I want to prevent submit on keypress ENTER and only allow submit on submit button click, but my current js prevent submit for both and if I remove from js then the form auto submit when user is trying to populate the form. Can some one please tell me what is the problem here? example Answer T…
Why is extending native objects a bad practice?
Every JS opinion leader says that extending the native objects is a bad practice. But why? Do we get a perfomance hit? Do they fear that somebody does it “the wrong way”, and adds enumerable types to Object, practically destroying all loops on any object? Take TJ Holowaychuk’s should.js for …
Convert integer array to string at javascript
Here is php code: the output is: 中文chinese Here is javascript code: the output is: ä¸æchinese So how should I process the array at javascript? Answer JavaScript strings consist of UTF-16 code units, yet the numbers in your array are the bytes of a UTF-8 string. Here is one way to convert the string, which us…
Can I append an array to ‘formdata’ in javascript?
I’m using FormData to upload files. I also want to send an array of other data. When I send just the image, it works fine. When I append some text to the formdata, it works fine. When I try to attach the ‘tags’ array below, everything else works fine but no array is sent. Any known issues wi…
bootstrap popover not showing on top of all elements
I’m working on a bootstrap site and after updating to bootstrap 2.2 from 2.0 everything worked except the popover. The popovers still show up fine, but they don’t show up on top of all other elements. Anyone have any idea on why the behavior of the popover changed, or how I can fix it? Thanks. Ans…
Access user email address in Meteor JS app
I am building an app using Meteor and need to access the stored email address of a logged-in user. I am currently using: to access the user. However, I am only able to access the id. The email address is stored in a nested object that looks like this: I have tried various ways to traverse the JSON object but
InfoWindow & GeoCoder
I have an issue with getting longitude and latitude values geocoded and then display the relevant address in an info window. I have tried multiple ways without success, however I must admit that I am not so familiar with javascript. I am continuously getting back as value : “undefined”. Here is a …