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Most efficient way to determine if a Lua table is empty (contains no entries)?
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155
Your code is efficient but wrong. (Consider {[false]=0}.) The correct code is
if next(myTab...
Java String to SHA1
I'm trying to make a simple String to SHA1 converter in Java and this is what I've got...
12 Answers
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Parsing JSON array into java.util.List with Gson
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edited Jun 27 '17 at 9:48
answered Aug 31 '13 at 11:32
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Cast an instance of a class to a @protocol in Objective-C
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172
The correct way to do this is to do:
if ([self.myViewController conformsToProtocol:@protocol(...
How to overwrite the previous print to stdout in python?
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16 Answers
16
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Getting a list of values from a list of dicts
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answered Sep 1 '11 at 14:08
Ismail BadawiIsmail Badawi
29.6k66 gold badges7373 silver badges9090 bronze badges
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How to find current transaction level?
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SELECT CASE transaction_isolation_level
WHEN 0 THEN 'Unspecified'
WHEN 1 THEN 'ReadUncommitted'
WHEN 2 THEN 'ReadCommitted'
WHEN 3 THEN 'Repeatable'
WHEN 4 THEN 'Serializable'
WHEN 5 THEN 'Snapshot' END AS TRANSACTION_ISOLATION_LEVEL
FROM sys.dm_exec_sessions
where session_id = @@SPID
do...
Amazon S3 CORS (Cross-Origin Resource Sharing) and Firefox cross-domain font loading
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12 Answers
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How do you reverse a string in place in C or C++?
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124
The standard algorithm is to use pointers to the start / end, and walk them inward until they ...
How to use a custom comparison function in Python 3?
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edited Feb 6 '19 at 6:19
caot
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answered Mar 28 '10 ...