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Why does PostgreSQL perform sequential scan on indexed column?
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In index scan, read head jumps from one row to another which is 1000 times slower than reading the next physical block (in the sequential scan).
So, if the (number of records to be retrieved * 1000) is less than the total number of record...
Reflecting parameter name: abuse of C# lambda expressions or syntax brilliance?
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I don't think the problem is readability after the code has been written. I think the real issue is the learnability of the code. What are you going to think when your intellisense says .Attributes(object obj)? You'll have to go read the documentation...
Android: Want to set custom fonts for whole application not runtime
...ritten for one activity. P.S. it's really odd to add one more object for a read only textView just to change the font. Off Topic: Android should really introduce a mechanism to fetch a font from assests folder and to be included in R so that it can be changed design time)
– Pra...
Is there a way to make npm install (the command) to work behind proxy?
Read about a proxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing.
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Pass Method as Parameter using C#
..., asynchronous execution, callbacks - all kinds of things. It's well worth reading up on them, particularly if you want to use LINQ. I have an article which is mostly about the differences between delegates and events, but you may find it useful anyway.
1 This is just based on the generic Func<...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
...) it's implemented purely in python and very slow, so if you need speed in reading files, it's not a good option.
If you need speed, and you need to support Python 2.6 or earlier, you can use codecs.open instead. It also has an encoding parameter, and is quite similar to io.open except it handles li...
How do I print the full value of a long string in gdb?
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Brilliant suggestion duskwuff, I wish I had read that before I copied & pasted it into a printf call to get the unescaped output.. :D
– nevelis
Oct 3 '11 at 23:37
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How do I insert datetime value into a SQLite database?
...r: 0000-9999
%% %
The alternative is to format the date/time into an already accepted format:
YYYY-MM-DD
YYYY-MM-DD HH:MM
YYYY-MM-DD HH:MM:SS
YYYY-MM-DD HH:MM:SS.SSS
YYYY-MM-DDTHH:MM
YYYY-MM-DDTHH:MM:SS
YYYY-MM-DDTHH:MM:SS.SSS
HH:MM
HH:MM:SS
HH:MM:SS.SSS
now
Reference: SQLite Date & Tim...
vector vs. list in STL
...ext element is present in the cache and can be retrieved without having to read slow RAM.
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Possible to iterate backwards through a foreach?
...he way that Count() does.) Note that this buffering means that the data is read completely when you first start iterating, whereas FastReverse will "see" any changes made to the list while you iterate. (It will also break if you remove multiple items between iterations.)
For general sequences, ther...