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Do declared properties require a corresponding instance variable?
...cy runtimes, instance variables must already be declared in the @interface block of the current class. If an instance variable of the same name as the property exists, and if its type is compatible with the property’s type, it is used—otherwise, you get a compiler error.
For the modern runtime...
Why does running the Flask dev server run itself twice?
...tly. Use the same ideas from Martijn's answer, except without the __main__ block.
if os.environ.get('WERKZEUG_RUN_MAIN') != 'true':
# do something only once, before the reloader
if os.environ.get('WERKZEUG_RUN_MAIN') == 'true':
# do something each reload
...
How does a garbage collector avoid an infinite loop here?
...n <filename unknown>:0
Thus your program crashes because stdout is blocked by the termintation of the environment.
When removing the Console.WriteLine and killing the program. It after five second the program terminates (in other words, the garbage collector gives up and simply will free al...
Using :before CSS pseudo element to add image to modal
... /* width of the image */;
height: /* height of the image */;
display: block;
}
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JavaScript and Threads
...t to test in Chrome and Firefox, although IE runs it slow enough to see it blocking interaction)
IE8 and IE9 can only do threads with the Gears plugin installed
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What's the difference between NOT EXISTS vs. NOT IN vs. LEFT JOIN WHERE IS NULL?
... Thanks for the links! And thanks for the quick overview... My office is blocking the link for some reason :P but I'll check it out as soon as I get to a regular computer.
– froadie
Feb 11 '10 at 18:47
...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...t;</button> for that behavior.
button.link {
display: inline-block;
position: relative;
background-color: transparent;
cursor: pointer;
border: 0;
padding: 0;
color: #00f;
text-decoration: underline;
font: inherit;
}
<p>A button that looks like a <but...
Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
... I am not sure I can help here... Did you reference it inside the block? (Website::Application.configure do ... config.action_mailer.default_url_options = { :host => 'yourapp.heroku.com' } ... end)
– benoitr
May 15 '11 at 2:52
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Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
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Doesn't calling cellForRowAtIndexPath within the final block cause the whole thing to get fired a second time?
– Mark Bridges
May 12 '17 at 10:06
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How to use timeit module
...
If you want to compare two blocks of code / functions quickly you could do:
import timeit
start_time = timeit.default_timer()
func1()
print(timeit.default_timer() - start_time)
start_time = timeit.default_timer()
func2()
print(timeit.default_timer()...