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php is null or empty?
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edited Dec 11 '19 at 23:39
kkurian
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Running a Haskell program on the Android OS
...een Haskell and Java?
– Phil
Apr 8 '11 at 2:51
@Po The NativeActivity is part of the android NDK glue code framework (...
How to print a linebreak in a python function?
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edited Jul 24 '15 at 11:47
RaffAl
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How to return a value from a Form in C#?
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answered Mar 8 '11 at 14:06
Richard FriendRichard Friend
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What is the (function() { } )() construct in JavaScript?
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edited Apr 28 at 8:11
answered Nov 22 '11 at 14:21
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What's the difference between event.stopPropagation and event.preventDefault?
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edited Jul 26 '19 at 11:44
Bob Stein
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Circle drawing with SVG's arc path
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answered Apr 21 '11 at 0:41
Todd MainTodd Main
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force client disconnect from server with socket.io and nodejs
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answered Apr 6 '11 at 0:29
nh2nh2
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How to size an Android view based on its parent's dimensions
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11 Answers
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Are there disadvantages to using a generic varchar(255) for all text-based fields?
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So a VARCHAR(255) in utf8 storing a short string like "No opinion" takes 11 bytes on disk (ten lower-charset characters, plus one byte for length) but it takes 765 bytes in memory, and thus in temp tables or sorted results.
I have helped MySQL users who unknowingly created 1.5GB temp tables frequ...