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if A vs if A is not None:
... method returns None if there were no rows in the result. Suppose you were selecting a value that might return 0 and need to know whether it's actually 0 or whether the query had no results at all.
A common idiom is to give a function or method's optional argument the default value of None, and the...
How to design a product table for many kinds of product where each product has many parameters
...urther If you would like to improve the performance of the queries you can select certain operations like for e.g. reporting or global text search and prepare for them index tables which would store required data and would be regenerated periodically, lets say every 30 minutes.
You don't even need ...
python pip: force install ignoring dependencies
...tools, pip. Setuptools (and pip) has "extras", but they must be explicitly selected and installed by the user.
– shadowtalker
Oct 18 '18 at 19:51
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What are the effects of exceptions on performance in Java?
...d trace the stack, and secondarily the throwing of the error. I would have selected this as the final answer.
– Engineer
Aug 17 '12 at 12:55
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In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
...BGU key work in #IF DEBUG works in debug mode and #ELSE in release mode:
Select your target,
In Build Setting tab search for "Active Compilation Condition",
Set the value of its "Debug" item to "YourKeyWord",
Use simply as follow:
#if DEBUG
print("You'r running in DEBUG mode!")
#else
prin...
Webfonts or Locally loaded fonts?
... I suppose if you're using a fairly popular font (may be cached) or only a select a handful of fonts, using webfonts is a great fairly quick font source. I'll post tests in speed here shortly.
– darcher
Mar 1 '14 at 21:04
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What is the difference between the Eclipse Package Explorer and the Eclipse Project Explorer?
...kage Explorer is it is the only explorer that appears in the list when you select "Show In" on a file that is being edited or has been found in the Search view.
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MVC4 style bundle giving 403
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Also in the select2 nuget package.
– Tetsujin no Oni
Jan 21 '15 at 14:01
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sh...
Multi-gradient shapes
...Shape());
p.setShaderFactory(sf);
Basically, the int array allows you to select multiple color stops, and the following float array defines where those stops are positioned (from 0 to 1). You can then, as stated, just use this as a standard Drawable.
Edit: Here's how you could use this in your sc...
Having a UITextField in a UITableViewCell
...he exact same thing. However, the text field only shows up when the row is selected. Otherwise is isn't drawn at all. In the above example I just get the label, ie Login. This is with iOS 4.2 on iPad.
– David
Jan 5 '11 at 6:53
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