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Does application.yml support environment variables?
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@IgorDonin, would concatenation of variable assignments and program call an option for you? E. g.: $MY_ENV=value && java -jar ...
– PAX
May 12 at 12:31
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Does Qt support virtual pure slots?
...lots in the base class. Second, you're just creating more work for the MOC and compiler since you're adding a (tiny) bit more code. Trivial, but whatever.
So, go for it..
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How can I catch a ctrl-c event?
...;stdlib.h>
#include <stdio.h>
#include <unistd.h>
void my_handler(int s){
printf("Caught signal %d\n",s);
exit(1);
}
int main(int argc,char** argv)
{
struct sigaction sigIntHandler;
sigIntHandler.sa_handler = my_handler;
sigemptyset(&sigIntHand...
Block Comments in Clojure
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A word of warning -- the (comment) macro expands to nil. Use #_ to comment a single form, or #_(comment ...) to comment multiple forms without inserting a nil.
– treat your mods well
Dec 18 '11 at 2:55
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Eager load polymorphic
... this issue, you need to explicitly define the relationship between Review and Shop.
class Review < ActiveRecord::Base
belongs_to :user
belongs_to :reviewable, polymorphic: true
# For Rails < 4
belongs_to :shop, foreign_key: 'reviewable_id', conditions: "reviews.reviewable_type = ...
In PHP, what is a closure and why does it use the “use” identifier?
I'm checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny:
6 Answers
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Design Pattern for Undo Engine
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Most examples I've seen use a variant of the Command-Pattern for this. Every user-action that's undoable gets its own command instance with all the information to execute the action and roll it back. You can then maintain a list of all the commands that have been executed a...
Make function wait until element exists
...you can put your function. The interval solution is really a bad solution and should be used only if nothing else works.
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Converting Dictionary to List? [duplicate]
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Your problem is that you have key and value in quotes making them strings, i.e. you're setting aKey to contain the string "key" and not the value of the variable key. Also, you're not clearing out the temp list, so you're adding to it each time, instead of j...
How to remove the border highlight on an input text element
...'focused' (currently selected/tabbed into), many browsers (at least Safari and Chrome) will put a blue border around it.
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