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Applicatives compose, monads don't
..., perhaps to tragic effect.
The monadic version relies essentially on the extra power of (>>=) to choose a computation from a value, and that can be important. However, supporting that power makes monads hard to compose. If we try to build ‘double-bind’
(>>>>==) :: (Monad m, ...
How can I add an item to a IEnumerable collection?
...ot necessarily represent a collection at all! For example:
IEnumerable<string> ReadLines()
{
string s;
do
{
s = Console.ReadLine();
yield return s;
} while (!string.IsNullOrEmpty(s));
}
IEnumerable<string> lines = ReadLines();
lines.Add("foo") //...
When and why I should use session_regenerate_id()?
...hen people come to my site and log in I regenerate the session. It adds an extra layer of security that my newly logged in user is less likely to get hijacked.
Any time we add critical data to a session you should consider regenerating the session ID. If you need to harden your application against ...
Django: Set foreign key using integer?
...at the purpose of the above optimisation, but I would prefer an accidental extra query to being incorrect. So be careful, only use this when you are finished working on your instance (eg employee).
share
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...
Should private helper methods be static if they can be static
...ate static void doSomethingStatic(int arg) { }
public static void main(String[] args) {
// do it twice both ways
doSomethingStatic(0);
doSomethingStatic(0);
TestBytecodeSize t = new TestBytecodeSize();
t.doSomething(0);
t.doSomething(0);
}
}
...
What is the Simplest Way to Reverse an ArrayList?
...adding elements :
public class ListUtil {
public static void main(String[] args) {
ArrayList<String> arrayList = new ArrayList<String>();
arrayList.add("1");
arrayList.add("2");
arrayList.add("3");
arrayList.add("4");
arrayList.add...
How to check sbt version?
...t project to jacek (in build file:/Users/jacek/)
[info] Setting: java.lang.String = 0.13.1
[info] Description:
[info] Provides the version of sbt. This setting should be not be modified.
[info] Provided by:
[info] */*:sbtVersion
[info] Defined at:
[info] (sbt.Defaults) Defaults.scala:68
[info] D...
Unable to open project… cannot be opened because the project file cannot be parsed
...h branch and simply removing the merge markers wasn't enough; I had to add extra lines to the project.pbxproj file in order to maintain correct formatting.
So, if you're running into parsing issues after you thought you'd resolved all you're merge conflicts, you might want to take a closer look at ...
LogCat message: The Google Play services resources were not found. Check your project configuration
...google.android.gms.common.GooglePlayServicesUtil.class. The aforementioned string appears only in one place:
public static int isGooglePlayServicesAvailable(Context context) {
PackageManager localPackageManager = context.getPackageManager();
try {
Resources localResources = context....
Disable scrolling in webview?
...
There's an extra parenthesis at the end of the return line there. Also this breaks HTML5 canvas and JavaScript touch events.
– Rohan Singh
Oct 9 '10 at 21:21
...