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Better way to cast object to int
...Exact() — For converting from a string in a specific format
Convert.ToInt32() — For converting an object of unknown type. It will use an explicit and implicit conversion or IConvertible implementation if any are defined.
as int? — Note the "?". The as operator is only for reference types, an...
How to parse a string into a nullable int
...
one less line: return Int32.TryParse(s, out i) ? i : null;
– Chris Shouts
Oct 23 '09 at 13:31
2
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Can't install nuget package because of “Failed to initialize the PowerShell host”
...will be applied according to the bit version of the PowerShell console, so 32bit or 64 bit. So if you want to install a package in Visual Studio (32 bit version) which requires a specific policy you should change settings of the policy via PowerShell (x86).
The command in PowerShell (as administrat...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...原因，总共出现了三种 FAT 格式 ： Fat12 ， Fat16 ，和 Fat32 。这三种版本的保留区域的差别是从第 37个字节开始的。下表列出了相同区域的字段的意义。
偏移量
字段描述
必须 的 ？
0-2
启动...
Generate a Hash from string in Javascript
... hash = ((hash << 5) - hash) + chr;
hash |= 0; // Convert to 32bit integer
}
return hash;
}
});
Source:
http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
sh...
How to check if running in Cygwin, Mac or Linux?
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The Git Bash uname -s output on Windows 7 is MINGW32_NT-6.1. Also, there is no /cygdrive prefix, just /c for C:.
– ColinM
Sep 10 '11 at 1:24
7
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What is Bit Masking?
... >> (shift right). This is how we can extract the four bytes from a 32-bit integer:
void more_stuff(uint32_t value) { // Example value: 0x01020304
uint32_t byte1 = (value >> 24); // 0x01020304 >> 24 is 0x01 so
...
Fastest way to iterate over all the chars in a String
... backing char[] of the string.
A fully randomized benchmark with JDK 8 (win32 and win64) on an 64 AMD Phenom II 4 core 955 @ 3.2 GHZ (in both client mode and server mode) with 9 different techniques (see below!) shows that using String.charAt(n) is the fastest for small strings and that using reflec...
How to count the number of set bits in a 32-bit integer?
...ou may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
i =...
Maximum Length of Command Line String
...uestion). Shortcuts (.lnk) are limited to 260 characters, CreateProcess to 32767, and ShellExecute to about 2048. According to Raymond Chen's article on the subject
– NtscCobalt
Oct 24 '12 at 21:47
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