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Get a CSS value with JavaScript
...
You can use getComputedStyle().
var element = document.getElementById('image_1'),
style = window.getComputedStyle(element),
top = style.getPropertyValue('top');
jsFiddle.
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What is the difference between exit(0) and exit(1) in C?
...tion status from a C program.
0 and EXIT_SUCCESS are the values specified by the standard to indicate successful termination, however, only EXIT_FAILURE is the standard value for returning unsucessful termination. 1 is used for the same in many implementations though.
Reference:
C99 Standar...
How do I change the value of a global variable inside of a function
...n you'll be updating the global variable.
You can override this behaviour by declaring it locally using var, but if you don't use var, then a variable name used in a function will be global if that variable has been declared globally.
That's why it's considered best practice to always declare your...
Understanding Spliterator, Collector and Stream in Java 8
...0, add an integer onto an existing result, and would 'combine' two results by adding them. Thus summing a spliterated stream of integers.
See:
Spliterator.trySplit()
Collector<T,A,R>
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Why are functions and methods in PHP case-insensitive?
...lity.
And, for variables (quoting):
Variables in PHP are represented by a
dollar sign followed by the name of
the variable. The variable name is
case-sensitive.
And object properties are not much more than variables in objects -- same remark about PHP 4 and backward-compatibility.
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PostgreSQL: Can you create an index in the CREATE TABLE definition?
...reSQL does however create an index for unique constraints and primary keys by default, as described in this note:
PostgreSQL automatically creates an index for each unique constraint and primary key constraint to enforce uniqueness.
Other than that, if you want a non-unique index, you will nee...
How to copy from current position to the end of line in vi
...o copy/paste between different instances, you can use the system clipboard by selecting the * register, so the commands become "*y$ for copying and "*p for pasting.
$ move-to-linebreak
$
y$ yank-to-linebreak
y,$
"*y$ select clipboard-register yank-to-linebreak
",*,y,$
"*p select clipboard-reg...
API Versioning for Rails Routes
...trollers here will be inside the V1 module inside the Api module: Api::V1. By defining resources :users inside this route, the controller will be located at Api::V1::UsersController. This is version 1, and you get there by making requests like /api/v1/users.
Version 2 is only a tiny bit different. ...
Iterate through the fields of a struct in Go
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After you've retrieved the reflect.Value of the field by using Field(i) you can get a
interface value from it by calling Interface(). Said interface value then represents the
value of the field.
There is no function to convert the value of the field to a concrete type as there...
How do I work with a git repository within another repository?
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Have your media files stored in one single git repository, which is used by many projects
If you modify a media file in any of the projects in your local machine, it should immediately appear in every other project (so you don't want to commit+push+pull all the time)
Unfortunately there is no ul...