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Why does the use of 'new' cause memory leaks?
...deletes automatically
This is a common idiom that goes by the not-very-descriptive name RAII (Resource Acquisition Is Initialization). When you acquire a resource that needs cleanup, you stick it in an object of automatic storage duration so you don't need to worry about cleaning it up. This app...
Cookie overflow in rails application?
...ation
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 use the...
How does password salt help against a rainbow table attack?
...
I know this is old, but your description of rainbow tables is incorrect. You're describing hash tables instead. For a rainbow table see security.stackexchange.com/questions/379/…. A hash table has 1 to 1 mapping of passwords to hashes (as you describe)...
Error “initializer element is not constant” when trying to initialize variable with const
...tions ideone uses under the hood, but their results are often weird beyond description. I tried compiling this code on Coliru (coliru.stacked-crooked.com/a/daae3ce4035f5c8b) and got the expected error for it regardless of what C language dialect setting I used. I don's see anything like that listed ...
How to set entire application in portrait mode only?
How do I set it so the application is running in portrait mode only? I want the landscape mode to be disabled while the application is running. How do I do it programmatically?
...
Recommendations of Python REST (web services) framework? [closed]
...sage
render_txt = lambda message: message
urls = (
'/(.*)', 'greet'
)
app = web.application(urls, globals())
class greet:
@mimerender(
default = 'html',
html = render_html,
xml = render_xml,
json = render_json,
txt = render_txt
)
def GET(se...
ReactJS Two components communicating
...
The best approach would depend on how you plan to arrange those components. A few example scenarios that come to mind right now:
<Filters /> is a child component of <List />
Both <Filters /> and <List /> are ...
Android Webview - Completely Clear the Cache
...n deletedFiles;
}
/*
* Delete the files older than numDays days from the application cache
* 0 means all files.
*/
public static void clearCache(final Context context, final int numDays) {
Log.i(TAG, String.format("Starting cache prune, deleting files older than %d days", numDays));
int ...
The application was unable to start correctly (0xc000007b)
I have a client/server app which I have been developing on a single PC. Now it needs two serial ports, so I borrowed a PC from a friend.
...
Who is calling the Java Thread interrupt() method if I'm not?
...r code should abandon what it is doing and cause itself to end by the most appropriate means. Depending on how your code was called, this might be done by returning or by throwing some appropriate exception. But it probably should not call System.exit(). (Your application does not necessarily kno...