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How to override the [] operator in Python?
...rwise this will happen:
>>> myobj[5] = 1
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: MyClass instance has no attribute '__setitem__'
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Mercurial move changes to a new branch
... @sschuberth: I think being explicit is a good thing here. If the extra changeset is a problem for you, combine it with the succeeding one (e.g. by using the fold command of the now built-in histedit extension).
– Oben Sonne
Nov 28 '12 at 12:19
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List all sequences in a Postgres db 8.1 with SQL
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The following query gives names of all sequences.
SELECT c.relname FROM pg_class c WHERE c.relkind = 'S';
Typically a sequence is named as ${table}_id_seq. Simple regex pattern matching will give you the table name.
To get last value of a sequence use the ...
How to see full query from SHOW PROCESSLIST
... @giorgio79: If I recall correctly, phpMyAdmin truncates all string results. It's been four years since I did any web development, though, so I could very well be mistaken.
– James McNellis
Aug 28 '12 at 15:29
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How to upload a file in Django? [closed]
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Phew, Django documentation really does not have good example about this. I spent over 2 hours to dig up all the pieces to understand how this works. With that knowledge I implemented a project that makes possible to upload files and show them as list. To...
How can I check if a program exists from a Bash script?
...e "&>" to simplify it, like Josh's answer. 2: break the { } into an extra line, putting a tab before the echo, for readability
– knocte
May 21 '16 at 13:06
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How to list branches that contain a given commit?
...uery git to find out which branches contain a given commit? gitk will usually list the branches, unless there are too many, in which case it just says "many (38)" or something like that. I need to know the full list, or at least whether certain branches contain the commit.
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LaTeX Optional Arguments
... wanted to create a command, \dx, to abbreviate \;\mathrm{d}x (i.e. put an extra space before the differential of the integral and have the "d" upright as well). But then I also wanted to make it flexible enough to include the variable of integration as an optional argument. I put the following code...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...e function Detect is fired when the user performs a gesture, and returns a string which is the name of the recognized gesture. If no gesture is detected, the returned string is empty. The function EnableDetection and DisableDetection are used to switch on and off the detection respectively.
Figure ...
Nullable type issue with ?: Conditional Operator
...mon ancestor type, it just tries to find a conversion between each other. (Extra bit: C# recognizes a <null> type, i.e. the type of every null expression.)
– IllidanS4 wants Monica back
Nov 4 '14 at 0:50
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