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Why does the order of the loops affect performance when iterating over a 2D array?
...2]
x[0][3]
x[1][0] etc...
Meaning that you're hitting them all in order. Now look at the 1st version. You're doing:
x[0][0]
x[1][0]
x[2][0]
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Why are unnamed namespaces used and what are their benefits?
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An anonymous namespace makes the enclosed variables, functions, classes, etc. available only inside that file. In your example it's a way to avoid global variables. There is no runtime or compile time performance difference.
There isn't so much an advantage or disadvantage aside from "do I want...
SQL standard to escape column names?
... SQLite,
'foo' is an SQL string
"foo" is an SQL identifier (column/table/etc)
[foo] is an identifier in MS SQL
`foo` is an identifier in MySQL
For qualified names, the syntax is: "t"."foo" or [t].[foo], etc.
MySQL supports the standard "foo" when the ANSI_QUOTES option is enabled.
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How to customise file type to syntax associations in Sublime Text?
... certain other niceties for file-syntax matching. allows regex expressions etc.
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What's the difference between and , and ?
...relevance (for mark). b is for key words, product names, actionable words, etc., while i is for technical terms, thoughts, phrases, etc. Honestly IMO, there needs to be a greater distinction between the two.
– chharvey
Jan 21 '12 at 4:51
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Rails: where does the infamous “current_user” come from?
...requisites to using current_user (like the existence of sessions, users, etc)?
2 Answers
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Do a “git export” (like “svn export”)?
..., contain other hidden git-specific files like .gitignore, .gitattributes, etc. If you don't want them in the archive, make sure you use the export-ignore attribute in a .gitattributes file and commit this before doing your archive. Read more...
Note: If you are interested in exporting the index,...
Mixin vs inheritance
...add ColorAndDimension to a, say, Shape class, a Sprite class, a Car class, etc. And they will all have the same interface (say get/setColor, get/setHeight/Width, etc.)
So, in the generic case a mixin IS inheritance. But you can argue it's a matter of the role of the class in the overall domain as to...
PHP multidimensional array search by value
...is did not work for me when the key in the $userdb did not start as 0,1, 2 etc.. and say the key are 1234,4566 etc. The resulting keys after the array_search are always 0,1,2 and so on
– Kaushtuv
Apr 11 '16 at 6:41
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Which MySQL data type to use for storing boolean values
...eah, I'd go for either this or, for a CHAR(1) and store 'Y'/'N' or 'T'/'F' etc. depending upon the context. The advantage of using a small integer type is that you get maximum portability across RDBMS-es
– Roland Bouman
May 15 '10 at 22:42
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