For most GNU/Linux distributions, a version of GnuCOBOL is available in the repositories. GnuCOBOL was originally OpenCOBOL, rebranded when the project became an official GNU project. Many repositories are still using open-cobol as the package name (as of August 2016).
For Fedora, and other RPM b...
By going to Settings >> Keymap A window will popup showing All the Editor Actions with the their name and shortcuts. Some of the Editor Actions do not have shortcuts. So right click on that and add a new shortcut to that.
Check the image below
Problem:
If after the AsyncTask starts there is a screen rotation the owning activity is destroyed and recreated.
When the AsyncTask finishes it wants to update the UI that may not valid anymore.
Solution:
Using Loaders, one can easily overcome the activity destruction/recreation.
Example:
...
To ignore a test, simply add the @Ignore annotation to the test and optionally provide a parameter to the annotation with the reason.
@Ignore("Calculator add not implemented yet.")
@Test
public void testPlus() {
assertEquals(5, calculator.add(2,3));
}
Compared to commenting the...
Find meaningful names for computation units.
Use for comprehensions or map to combine computations together.
Let's say you have something like this:
if (userAuthorized.nonEmtpy) {
makeRequest().map {
case Success(respone) =>
someProcessing(..)
if (resendToUser) {
...
Say we have Products and Categorys in a many-to-many relationship:
public class Product
{
public Product()
{
Categories = new HashSet<Category>();
}
public int ProductId { get; set; }
public string ProductName { get; set; }
public virtual ICollection<...
The Fibonacci numbers are defined inductively as
F0 = 0
F1 = 1
Fn+2 = Fn + Fn+1
The sum of the first n+1 Fibonacci numbers is given by
F0 + F1 + F2 + ... + Fn = Fn+2 - 1.
This summation arises, among other places, in the analysis of Fibonacci heaps, where it's used to provide a lower b...
You can animate complex changes to your collection view using the performBatchUpdates method. Inside the update block, you can specify several modifications to have them animate all at once.
collecitonView.performBatchUpdates({
// Perform updates
}, nil)
Inside the update block, you can pe...
Before starting with the example I'd recommend to create a Singleton with a delegate class member so you could achieve a use case of uploading a file in the background and let the user keep using your app while the files are being uploaded even when the app is the background.
Let's start, first, we...
If all you need is to wrap the value into a promise, you don't need to use the long syntax like here:
//OVERLY VERBOSE
var defer;
defer = $q.defer();
defer.resolve(['one', 'two']);
return defer.promise;
In this case you can just write:
//BETTER
return $q.when(['one', 'two']);
$q.when ...
Pressing C-h a will run the emacs function apropos-command which makes emacs prompt for words (or a regexp) to search for. It will then show a buffer containing a list of names and descriptions related to that topic, including key bindings for each of the functions available via keystrokes.
Pressin...
C-h k runs the function describe-key, which looks up the function mapped to the key strokes provided, and presents a description of the function which will be run when these keys are pressed.
C-h c runs the function describe-key-briefly, which only displays the function name mapped to given key seq...
Vectors can be map'd and fold'd,filter'd andzip`'d:
Prelude Data.Vector> Data.Vector.map (^2) y
fromList [0,1,4,9,16,25,36,49,64,81,100,121] :: Data.Vector.Vector
Reduce to a single value:
Prelude Data.Vector> Data.Vector.foldl (+) 0 y
66
Zip two arrays into an array of pairs:
Prelude Data.Vector> Data.Vector.zip y y
fromList [(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10),(11,11)] :: Data.Vector.Vector
select returns a new hash with key-value pairs for which the block evaluates to true.
{ :a => 1, :b => 2, :c => 3 }.select { |k, v| k != :a && v.even? } # => { :b => 2 }
When you will not need the key or value in a filter block, the convention is to use an _ in that place:...
These rules apply only if you use manual reference counting!
You own any object you create
By calling a method whose name begins with alloc, new, copy or mutableCopy.
For example:
NSObject *object1 = [[NSObject alloc] init];
NSObject *object2 = [NSObject new];
NSObject *object3 = [object2 ...
A Haskell project can either use the system wide packages or use a sandbox. A sandbox is an isolated package database and can prevent dependency conflicts, e. g. if multiple Haskell projects use different versions of a package.
To initialize a sandbox for a Haskell package go to its directory and r...
After you have opened a split window in vim (as demonstrated by many examples under this tag) then you will likely want to control windows quickly. Here is how to control split windows using keyboard shortcuts.
Move to split Above/Below:
Ctrl + w and k
Ctrl + w and j
Move to split Left/Right...
