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Linux: compute a single hash for a given folder & contents?
...=0, GID=0
Preferred I/O block size : 4096 bytes
Blocks allocated : 200
Last status change : Tue, 21 Nov 17 21:28:18 +0530
Last file access : Thu, 28 Dec 17 00:53:27 +0530
Last file modification : Tue, 21 Nov 17 21:28...
proper way to sudo over ssh
...ssh -t user@server "sudo script"
See man ssh:
-t Force pseudo-tty allocation. This can be used to execute arbi-
trary screen-based programs on a remote machine, which can be
very useful, e.g., when implementing menu services. Multiple -t
options force tty alloca...
String's Maximum length in Java - calling length() method
...ver, there probably are going to be other limitations, such as the maximum allocatable size for an array.
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Using a BOOL property
...fit to using properties with primitive types. @property is used with heap allocated NSObjects like NSString*, NSNumber*, UIButton*, and etc, because memory managed accessors are created for free. When you create a BOOL, the value is always allocated on the stack and does not require any special ac...
No output to console from a WPF application?
...32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kernel32_DllName)]
private static extern IntPtr GetConsoleWindow();
[DllImport(Kernel32_DllName)]
p...
How to delete a row by reference in data.table?
...nce yet.
data.table can add and delete columns by reference since it over-allocates the vector of column pointers, as you know. The plan is to do something similar for rows and allow fast insert and delete. A row delete would use memmove in C to budge up the items (in each and every column) after t...
When should I use a struct instead of a class?
...hort-living. In such a case there is a good chance that the object will be allocated on the stack which is much more efficient than putting it on the managed heap. What is more the memory allocated by the object will be freed as soon as it goes outside its scope. In other words it's less work for Ga...
Java8 Lambdas vs Anonymous classes
...st don't try to use your counter from multiple threads. If you're going to allocate something on the heap and capture it in a lambda, you might as well use an AIC and add a field that you can mutate directly. Using a lambda this way can work, but why bother when you can use a real object?
...
Make first letter of a string upper case (with maximum performance)
...lternative char.ToUpper(s[0]) + s.Substring(1), is that only one string is allocated, whereas the Substring approach allocates a string for the substring, then a second string to compose the final result.
EDIT: Here is what this approach looks like, combined with the initial test from CarlosMuño...
Convert NSData to String?
...oding:(NSStringEncoding)encoding
Example:
NSString *myString = [[NSString alloc] initWithData:myData encoding:NSUTF8StringEncoding];
Remark: Please notice the NSData value must be valid for the encoding specified (UTF-8 in the example above), otherwise nil will be returned:
Returns nil if the ini...