大约有 30,000 项符合查询结果（耗时：0.0408秒） [XML]
Which one will execute faster, if (flag==0) or if (0==flag)?
...
Same code for amd64 with GCC 4.1.2:
.loc 1 4 0 # int f = argc;
movl -20(%rbp), %eax
movl %eax, -4(%rbp)
.loc 1 6 0 # if( f == 0 ) {
cmpl $0, -4(%rbp)
jne .L2
.loc 1 7 0 # ...
How to get the filename without the extension from a path in Python?
...ng like os.path.filename(path_to_file) instead of os.path.splitext(os.path.basename(path_to_file))[0]
– Fnord
Jul 2 '14 at 17:13
20
...
How to make an immutable object in Python?
...utable object in Python could be slightly tricky. You can't just override __setattr__ , because then you can't even set attributes in the __init__ . Subclassing a tuple is a trick that works:
...
How to enumerate an object's properties in Python?
... print(property, ":", value)
Be aware that in some rare cases there's a __slots__ property, such classes often have no __dict__.
share
|
improve this answer
|
follow
...
How to override the copy/deepcopy operations for a Python object?
...ully, but this is the first time I've actually gone about overloading the __copy__ and __deepcopy__ methods. I've already Googled around and looked through the built-in Python modules to look for instances of the __copy__ and __deepcopy__ functions (e.g. sets.py , decimal.py , and fracti...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
What's the difference between __PRETTY_FUNCTION__ , __FUNCTION__ , __func__ , and where are they documented? How do I decide which one to use?
...
What does 'require: false' in Gemfile mean?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Explaining Python's '__enter__' and '__exit__'
...
Using these magic methods (__enter__, __exit__) allows you to implement objects which can be used easily with the with statement.
The idea is that it makes it easy to build code which needs some 'cleandown' code executed (think of it as a try-finally...
What is the difference between public, protected, package-private and private in Java?
...
The official tutorial may be of some use to you.
______________________________________________________________
| │ Class │ Package │ Subclass │ Subclass │ World |
| │ │ │(same pkg)│(diff pkg)│ |
|─────...
An example of how to use getopts in bash
...
#
# location to getopts.sh file
source ./getopt.sh
USAGE="-u USER -d DATABASE -p PASS -s SID [ -a START_DATE_TIME ]"
parse_options "${USAGE}" ${@}
echo ${USER}
echo ${START_DATE_TIME}
Old answer:
I recently needed to use a generic approach. I came across with this solution:
#!/bin/bash
# Opti...