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How to form tuple column from two columns in Pandas
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This method list(zip(df.lat, df.long)) in 124ms is much more efficient than df[['lat', 'long']].apply(tuple, axis=1) in 14.2 s for 900k rows. The ratio is more than 100.
– Pengju Zhao
Aug 2 '17 at 4:21
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Auto-size dynamic text to fill fixed size container
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Setting Short Value Java
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You are right on both. I should have been more clear that I'm talking about integer literals here, not about floating-point literals.
– Lauri
Feb 19 '10 at 8:55
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MySQL - UPDATE query based on SELECT Query
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The first form (update with join) is going to be a lot more efficient than the second. The first would do a single join, whereas the second would execute the select query for every row of tableA.
– ColinM
Nov 8 '12 at 17:54
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
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Convert Iterator to ArrayList
...rned by, say, Guava any better than a normal ArrayList? Do they do it in a more efficient way? Even if it is more efficient is it really worth adding an extra dependency (and more complexity) to your project?
– CorayThan
Feb 24 '13 at 23:16
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C# version of java's synchronized keyword?
...in older Microsoft compilers it is a lock(this) / lock(Type) - however, in more recent compilers it uses Interlocked updates - so thread-safe without the nasty parts.
This allows more granular usage, and allows use of Monitor.Wait/Monitor.Pulse etc to communicate between threads.
A related blog en...
What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
...sulting implementation.
A Repository "acts like a collection, except with more elaborate querying capability" [Evans, Domain Driven Design] and may be considered as an "objects in memory facade" (Repository discussion)
A DataMapper "moves data between objects and a database while keeping them inde...
jQuery removeClass wildcard
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I like this solution best! How can I check for two or more classes to be removed? i.e. sport-, nav- and color- ?
– lowtechsun
Feb 20 '16 at 15:09
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