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In MySQL queries, why use join instead of where?
...s joins because the join conditions are not right next to the table names. If you have 6 tables being joined together, it is easy to miss one in the where clause. You will see this fixed all too often by using the distinct keyword. This is ahuge performance hit for the database. You can't get an acc...
How to add a string to a string[] array? There's no .Add function
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Array.Resize is the proper way to resize an array. If you add a comment before the code snippet saying it's rarely the best way to handle situations where the array represents a resizable collection you've got a +1. :)
– Sam Harwell
Sep ...
What's the difference between Invoke() and BeginInvoke()
Just wondering what the difference between BeginInvoke() and Invoke() are?
6 Answers
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Given a view, how do I get its viewController?
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I'm not sure if it would break MVC principles. At any one point, a view has only one view controller. Being able to get to it in order to pass a message back to it, should be an automatic feature, not one where you have to work to achie...
SQLite - increase value by a certain number
...r all rows):
UPDATE Products SET Price = Price + 50
Sample 2 (for a specific row):
UPDATE Products SET Price = Price + 50 WHERE ProductID = 1
Sample 3 (generic):
UPDATE {Table} SET {Column} = {Column} + {Value} WHERE {Condition}
Where:
{Table} - table name
{Column} - column name
{Value} -...
How to create a UIView bounce animation?
..., Teehanlax has a clear, concise tutorial with the full project in github. If you want a more detailed tutorial about the ins-and-outs of dynamics, the Ray Winderlich tutorial is great. As always, the Apple docs are a great first stop, so check out the UIDynamicAnimator Class reference in the docs.
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Python: Bind an Unbound Method?
...d accept the
instance as the first argument, i.e. "self".
"""
if as_name is None:
as_name = func.__name__
bound_method = func.__get__(instance, instance.__class__)
setattr(instance, as_name, bound_method)
return bound_method
class Thing:
def __init__(self, val):...
How to have Emacs auto-refresh all buffers when files have changed on disk?
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@Dave: (global-)auto-reverse-mode will not revert a file if the corresponding buffer is modified, so there should be no risk of you losing unsaved changes.
– Lindydancer
Mar 4 '12 at 15:23
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I have 2 dates in PHP, how can I run a foreach loop to go through all of those days?
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This will output all days in the defined period between $start and $end. If you want to include the 10th, set $end to 11th. You can adjust format to your liking. See the PHP Manual for DatePeriod.
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What are the differences and similarities between ffmpeg, libav, and avconv?
...the FFmpeg libraries, is unrelated to the Libav project.
How to tell the difference
If you are using avconv then you are using Libav. If you are using ffmpeg you could be using FFmpeg or Libav. Refer to the first line in the console output to tell the difference: the copyright notice will either m...