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What size do you use for varchar(MAX) in your parameter declaration?
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is there any performance drawback to setting all parameter lengths to -1, so I dont have to maintain a db-matching list?
– Andrew Bullock
Jul 23 '14 at 16:02
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Inno Setup for Windows service?
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For the C# neophyte (like me), you either need to add a using System.Reflection; or change Assembly to System.Reflection.Assembly in the code above.
– rlandster
Oct 9 '11 at 19:16
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How do I convert from stringstream to string in C++?
...end of the expression, so directly calling c_str() on the result of str() (for example in auto *ptr = out.str().c_str();) results in a dangling pointer...
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How can I get a precise time, for example in milliseconds in Objective-C?
...to calculate millisecond time accuracy, you can do:
// Get a current time for where you want to start measuring from
NSDate *date = [NSDate date];
// do work...
// Find elapsed time and convert to milliseconds
// Use (-) modifier to conversion since receiver is earlier than now
double timePassed_...
String replacement in Objective-C
....to get a new string with a substring replaced (See NSString documentation for others)
Example use
NSString *str = @"This is a string";
str = [str stringByReplacingOccurrencesOfString:@"string"
withString:@"duck"];
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How to show git log history for a sub directory of a git repo?
...path>.. from the <since>..<until> refspecs.
# Show changes for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitign...
Java unchecked: unchecked generic array creation for varargs parameter
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As janoh.janoh mentioned above, varargs in Java is just a syntactic sugar for arrays plus the implicit creation of an array at the calling site. So
List<List<String>> combinations =
Utils.createCombinations(cocNumbers, vatNumbers, ibans);
is actually
List<List<String>&g...
Force add despite the .gitignore file
Is there a way to force git to add a file despite the .gitignore file?
3 Answers
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How to find the length of a string in R
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See ?nchar. For example:
> nchar("foo")
[1] 3
> set.seed(10)
> strn <- paste(sample(LETTERS, 10), collapse = "")
> strn
[1] "NHKPBEFTLY"
> nchar(strn)
[1] 10
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Python using enumerate inside list comprehension
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Try this:
[(i, j) for i, j in enumerate(mylist)]
You need to put i,j inside a tuple for the list comprehension to work. Alternatively, given that enumerate() already returns a tuple, you can return it directly without unpacking it first:
[p...