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What is the best way to concatenate two vectors?
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Depends on whether you really need to physically concatenate the two vectors or you want to give the appearance of concatenation of the sake of iteration. The boost::join function
http://www.boost.org/doc/libs/1_43_0/libs/range/doc/html/range/reference/utilities/join.html
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Are string.Equals() and == operator really same? [duplicate]
...ntern pool of course due to b; but a would be the result of calling String.Concat("Hell", "o");
– Jon Skeet
Sep 9 '10 at 20:54
2
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What reason is there to use null instead of undefined in JavaScript?
...eed to make different falsy checks. It would not be the last time that you concat a null object to a string and get a "null" as a string. Or passing a 0 as numeric value and wondering why the IF statement handles is t as a false.
– com2ghz
Feb 11 '16 at 9:29
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Fastest way to check if string contains only digits
...; int r = 12345678*2; var ss = new SortedSet<string>(); //s = string.Concat(Enumerable.Range(0, 127).Select(i => ((char)i ^ '0') < 10 ? 1 : 0));
w.Restart(); for (int i = 0; i < r; i++) b = s.All(char.IsDigit); w.Stop(); ss.Add(w.Elapsed + ".All .IsDigit");
w.Restart(); for (...
Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...
How to declare variable and use it in the same Oracle SQL script?
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Is it possible to concatenate variables+strings?
– Ecropolis
Jun 18 '14 at 15:01
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Tab space instead of multiple non-breaking spaces (“nbsp”)?
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Was looking for this when building a large concat() query in MySQL for use in a Crystal Report. the ASCII (&#09;) did the job perfectly!
– MikeMighty
Mar 9 '18 at 14:40
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Best way to parse command-line parameters? [closed]
... to improve on (by using a List).
Note also that this approach allows for concatenation of multiple command line arguments - even more than two!
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Fastest Way to Find Distance Between Two Lat/Long Points
...find the values:
SELECT *
FROM table
WHERE MBRContains(LineFromText(CONCAT(
'('
, @lon + 10 / ( 111.1 / cos(RADIANS(@lon)))
, ' '
, @lat + 10 / 111.1
, ','
, @lon - 10 / ( 111.1 / cos(RADIANS(@lat)))
, ' '
, @lat - 10 / 111.1
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Hash and salt passwords in C#
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What blowdart said, but with a little less code. Use Linq or CopyTo to concatenate arrays.
public static byte[] Hash(string value, byte[] salt)
{
return Hash(Encoding.UTF8.GetBytes(value), salt);
}
public static byte[] Hash(byte[] value, byte[] salt)
{
byte[] saltedValue = value.Concat...