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Convert UTC Epoch to local date
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thought maybe others could get some clarity from a couple points: the date object does not get set with a timezone "stamped in it". think of it as nothing but a number. that number is the number of milliseconds since 1970 jan 1 UTC, to now (now being in UTC also). So,...
What is the meaning of prepended double colon “::”?
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This ensures that resolution occurs from the global namespace, instead of starting at the namespace you're currently in. For instance, if you had two different classes called Configuration as such:
class Configuration; // class 1, in global namespace
namespace...
What's better at freeing memory with PHP: unset() or $var = null
...a. You might get memory freed / shrunk faster, but it may steal CPU cycles from the code that truly needs them sooner, resulting in a longer overall execution time.
(Since 2013, that unset man page don't include that section anymore)
Note that until php5.3, if you have two objects in circular refer...
Cookie overflow in rails application?
...he migration
rake db:migrate
Modify config/initializers/session_store.rb from
(App)::Application.config.session_store :cookie_store, :key => 'xxx'
to
(App)::Application.config.session_store :active_record_store
Once you’ve done the three steps, restart your application. Rails will now ...
Case-insensitive search
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Yeah, use .match, rather than .search. The result from the .match call will return the actual string that was matched itself, but it can still be used as a boolean value.
var string = "Stackoverflow is the BEST";
var result = string.match(/best/i);
// result == 'BEST';
if ...
What is the best way to implement “remember me” for a website? [closed]
...dentifier and a token. The series and token are unguessable random numbers from a suitably large space. Both are stored together in a database table, the token is hashed (sha256 is fine).
When a non-logged-in user visits the site and presents a login cookie, the series identifier is looked up in the...
How to declare global variables in Android?
...class and make it available for your entire application. You can access it from any context using the Context.getApplicationContext() method (Activity also provides a method getApplication() which has the exact same effect). Following is an extremely simplified example, with caveats to follow:
clas...
How do you detect Credit card type based on number?
...PAN, or Primary Account Number. The first six digits of the PAN are taken from the IIN, or Issuer Identification Number, belonging to the issuing bank (IINs were previously known as BIN — Bank Identification Numbers — so you may see references to that terminology in some documents). These six ...
Difference between static class and singleton pattern?
...h of static methods is that singletons can implement interfaces (or derive from useful base classes, although that's less common, in my experience), so you can pass around the singleton as if it were "just another" implementation.
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How to get current relative directory of your Makefile?
...shell pwd)).
Update.
Given solution only works when you are running make from the Makefile's current directory.
As @Flimm noted:
Note that this returns the current working directory, not the parent directory of the Makefile. For example, if you run cd /; make -f /home/username/project/Makefile...