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Difference between dict.clear() and assigning {} in Python
In python, is there a difference between calling clear() and assigning {} to a dictionary? If yes, what is it?
Example:
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how perform grep operation on all files in a directory
...ld be sufficient. By default, grep would skip all subdirectories. However, if you want to grep through them, grep -r $PATTERN * is the case.
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libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...client_t *client = (client_t*)opaque;
size_t rdsz;
int sz;
if (client->total_len <= client->cur_size) {
// 读新请求
// 获得新请求的总长度
rdsz = bufferevent_read(ev_buf, &sz, sizeof(int));
client->total_len = sz;
// 开始读...
Convert JSON style properties names to Java CamelCase names with GSON
...eal objects have some properties named like is_online. GSON only maps them if they are named totally equal, it would be nice to have GSON convert the names to Java camel case isOnline.
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How to revert a Git Submodule pointer to the commit stored in the containing repository?
...d it, the main repo stores a SHA value (somewhere...), pointing to the specific commit of the submodule that it is "linked to".
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Unnamed/anonymous namespaces vs. static functions
...nly. The static keyword applied to entity declared in namespace scope specifies its internal linkage. Entity declared in anonymous namespace has external linkage (C++/3.5) however it is guaranteed to live in uniquely named scope. This anonymity of unnamed namespace effectively hides its declaratio...
Fade/dissolve when changing UIImageView's image
... UIImageViews , it seems logical to simply change the image of one view. If I do that, is there anyway of having a fade/cross dissolve between the two images rather than an instant switch?
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Convert Enum to String
...way possible.
Any use of enum names does interfere with code obfuscation, if you consider obfuscation of enum names to be worthwhile or important - that's probably a whole other question.
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Can Python print a function definition?
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If you are importing the function, you can use inspect.getsource:
>>> import re
>>> import inspect
>>> print inspect.getsource(re.compile)
def compile(pattern, flags=0):
"Compile a regular expr...
Deleting folders in python recursively
... directory = Path(directory)
for item in directory.iterdir():
if item.is_dir():
rmdir(item)
else:
item.unlink()
directory.rmdir()
rmdir(Path("dir/"))
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