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Split string every nth character?
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>>> line = '1234567890'
>>> n = 2
>>> [line[i:i+n] for i in range(0, len(line), n)]
['12', '34', '56', '78', '90']
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im...
Set selected index of an Android RadioGroup
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202
If your radio group is defined in a layout xml file, each button can be assigned an id. Then y...
Python Empty Generator Function
...enerator function definitions:
def zeros():
while True:
yield 0
def ones():
while True:
yield 1
...
At the end of that long list, I'd rather see something with a yield in it, like this:
def empty():
return
yield
or, in Python 3.3 and above (as suggested by DSM...
What is recursion and when should I use it?
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40 Answers
40
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How to get IntPtr from byte[] in C#
...unmanagedPointer = Marshal.AllocHGlobal(bytes.Length);
Marshal.Copy(bytes, 0, unmanagedPointer, bytes.Length);
// Call unmanaged code
Marshal.FreeHGlobal(unmanagedPointer);
Alternatively you could declare a struct with one property and then use Marshal.PtrToStructure, but that would still require ...
Recent file history in Vim?
... previous ten files into ~/.viminfo in the filemarks section. You can use '0, '1, '2, ... '9 to jump among them.
(Probably only useful for '0 to get back to the last file you were editing, unless your memory is stronger than mine.)
You can also use the :browse oldfiles command to get a menu with...
Access Denied for User 'root'@'localhost' (using password: YES) - No Privileges?
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20 Answers
20
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“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
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1097
Notice: Undefined variable
From the vast wisdom of the PHP Manual:
Relying on the default...
Git copy file preserving history [duplicate]
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edited Dec 7 '16 at 20:56
jschreiner
3,97922 gold badges99 silver badges1515 bronze badges
answered...
What is reflection and why is it useful?
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edited Mar 7 at 23:08
Paul Ntshabeleng
4711 silver badge1111 bronze badges
answered Sep 1 '08 at ...