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Where is JAVA_HOME on macOS Mojave (10.14) to Lion (10.7)?
...xport JAVA_HOME="$(/usr/libexec/java_home -v 1.8)"
Update: added -v flag based on Jilles van Gurp response.
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Check if a given key already exists in a dictionary
I wanted to test if a key exists in a dictionary before updating the value for the key.
I wrote the following code:
16 Answ...
Most common C# bitwise operations on enums
...= 2,
Three = 4,
Four = 8,
Five = 16,
Six = 32,
Seven = 64,
Eight = 128,
Nine = 256,
Ten = 512
}
class Program
{
static void Main(string[] args)
{
TestFlags f = TestFlags.Five; /* or any other enum */
bool result = false;
Stopwatch s ...
Equivalent of varchar(max) in MySQL?
... max length of a varchar is subject to the max row size in MySQL, which is 64KB (not counting BLOBs):
VARCHAR(65535)
However, note that the limit is lower if you use a multi-byte character set:
VARCHAR(21844) CHARACTER SET utf8
Here are some examples:
The maximum row size is 65535, but a va...
Where is Developer Command Prompt for VS2013?
...
I used a modified version of this answer - based on my experiences adding it to VS 2010:
Select Tools >> External Tools in Visual Studio
Click Add
Title: I use Visual Studio Command &Prompt
&P Makes P a alt-shortcut key (when menu active)
I originall...
Using AES encryption in C#
... cipher.Clear();
}
return Convert.ToBase64String(encrypted);
}
public static string Decrypt(string value, string password) {
return Decrypt<AesManaged>(value, password);
}
public static string Decrypt<T>(stri...
Iterator Loop vs index loop [duplicate]
...nly one out of four distinct ways to iterate over a std::vector:
1) index-based iteration
for (std::size_t i = 0; i != v.size(); ++i) {
// access element as v[i]
// any code including continue, break, return
}
Advantages: familiar to anyone familiar with C-style code, can loop using dif...
How to completely remove node.js from Windows
...X and Linux, but couldn't find anything for Windows. I'm running Windows 7 64-bit.
8 Answers
...
String literals: Where do they go?
...ts of the array, the behavior is undefined.
Where do they go?
GCC 4.8 x86-64 ELF Ubuntu 14.04:
char s[]: stack
char *s:
.rodata section of the object file
the same segment where the .text section of the object file gets dumped, which has Read and Exec permissions, but not Write
Program:
#inclu...
Pry: show me the stack
...(method, *args)>
#2 [method] process_action <AbstractController::Base#process_action(method_name, *args)>
#3 [method] process_action <ActionController::Rendering#process_action(*arg1)>
<... clipped ...>
[2] pry(#<PostsController>)> up
Frame number: 1/64
Frame ...