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How to split a dos path into its components in Python
...
In Python >=3.4 this has become much simpler. You can now use pathlib.Path.parts to get all the parts of a path.
Example:
>>> from pathlib import Path
>>> Path('C:/path/to/file.txt').parts
('C:\\', 'path', 'to', '...
UnboundLocalError on local variable when reassigned after first use
...
Taking a look at the disassembly may clarify what is happening:
>>> def f():
... print a
... print b
... a = 1
>>> import dis
>>> dis.dis(f)
2 0 LOAD_FAST 0 (a)
3 PRINT_ITEM
4 PRINT_NEWLINE
3 ...
CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...ss in CoffeeScript, should all the instance method be defined using the => ("fat arrow") operator and all the static methods being defined using the -> operator?
...
Laravel Eloquent: Ordering results of all()
...n actually do this within the query.
$results = Project::orderBy('name')->get();
This will return all results with the proper order.
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follo...
What is the difference between mutex and critical section?
...ght than mutexes.
Mutexes can be shared between processes, but always result in a system call to the kernel which has some overhead.
Critical sections can only be used within one process, but have the advantage that they only switch to kernel mode in the case of contention - Uncontended acquires, ...
hasNext in Python iterators?
... the StopIteration by using next(iterator, default_value).
For exapmle:
>>> a = iter('hi')
>>> print next(a, None)
h
>>> print next(a, None)
i
>>> print next(a, None)
None
So you can detect for None or other pre-specified value for end of the iterator if you d...
Unicode (UTF-8) reading and writing to files in Python
... in your code you read them all. You can see this when you display them:
>>> open('f2').read()
'Capit\\xc3\\xa1n\n'
You can see that the backslash is escaped by a backslash. So you have four bytes in your string: "\", "x", "c" and "3".
Edit:
As others pointed out in their answers you s...
How to URL encode a string in Ruby
...\x12\x34\x56\x78\x9a".force_encoding('ASCII-8BIT')
puts CGI.escape str
=> "%124Vx%9A%BC%DE%F1%23Eg%89%AB%CD%EF%124Vx%9A"
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How do I pass a string into subprocess.Popen (using the stdin argument)?
...
Replacing os.popen*
pipe = os.popen(cmd, 'w', bufsize)
# ==>
pipe = Popen(cmd, shell=True, bufsize=bufsize, stdin=PIPE).stdin
Warning Use communicate() rather than
stdin.write(), stdout.read() or
stderr.read() to avoid deadlocks due
to any of the other OS pipe buffer...
Capitalize words in string [duplicate]
... * @return {string}
* @usage
* capitalize('fix this string'); // -> 'Fix This String'
* capitalize('javaSCrIPT'); // -> 'JavaSCrIPT'
* capitalize('javaSCrIPT', true); // -> 'Javascript'
*/
const capitalize = (str, lower = false) =>
(lower ? str.toLowerCase() ...