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Haskell Type vs Data Constructor
... totally different. So you might do something like this:
data Config = XML_Config {...} | JSON_Config {...}
(With some suitable fields in there, obviously.) You can't do stuff like this in normal programming languages, which is why most people aren't used to it.
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Most lightweight way to create a random string and a random hexadecimal number
...xrange(30))", "import random")
>>> t2 = timeit.Timer("binascii.b2a_hex(os.urandom(15))", "import os, binascii")
>>> t3 = timeit.Timer("'%030x' % random.randrange(16**30)", "import random")
>>> for t in t1, t2, t3:
... t.timeit()
...
28.165037870407104
9.02927398681640...
How to add an image to a JPanel?
...e image according to the size of the JLabel?
– coding_idiot
Dec 7 '11 at 14:26
1
Nice code! I'm n...
How to create new tmux session if none exists
...ause with a small tweak this works with named sessions: tmux attach -t some_name || tmux new -s some_name. Change some_name to $1 add a shebang, and save.
– Cheezmeister
Jan 9 '14 at 4:48
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The transaction manager has disabled its support for remote/network transactions
...m.
Basically I had duplicate CID's for the MSDTC across both servers. HKEY_CLASSES_ROOT\CID
See: http://msdn.microsoft.com/en-us/library/aa561924.aspx section Ensure that MSDTC is assigned a unique CID value
I am working with virtual servers and our server team likes to use the same image for eve...
Convert decimal to hexadecimal in UNIX shell script
...ilter a whole file of integers, one per line:
( echo "obase=16" ; cat file_of_integers ) | bc
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How do I change the default port (9000) that Play uses when I execute the “run” command?
... file I created a file in the distributable root directory called: {PROJECT_NAME}_config.txt and added:
-Dhttp.port=8080
Where {PROJECT_NAME} should be replaced with the name of your project. Then started the {PROJECT_NAME}.bat script as usual in the bin\ directory.
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How do I initialize a byte array in Java?
... @petmez dumb question: in JAVA, is something like "".getBytes(UTF_8)); (getBytes on an empty string) a safe thing to do? is it 'legal'? Or can I just do: = new byte[0]; ?
– Robert Achmann
Mar 1 '19 at 18:35
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Unable to import a module that is definitely installed
...nt's: make sure you got the right directory by doing $ pip show <package_name>
– Federico
Aug 10 '16 at 5:05
3
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总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast简单总结：1)const_cast：移除const属性。2)static_cast：强转，与C类型转换类似，不检查类型来保证转换安全。也可用于指针的父类到子类的...简单总结：
1) const_cast：移除const属性。
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