大约有 40,000 项符合查询结果（耗时：0.0492秒） [XML]
Dictionary vs Object - which is more efficient and why?
...ots__ = ('i', 'l')
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_obj.py:
class Obj(object):
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_dict.py:
all = {}
for i in...
List all the files that ever existed in a Git repository
Do you have a clean way to list all the files that ever existed in specified branch?
4 Answers
...
Enum String Name from Value
...onvert the int back to an enumeration member with a simple cast, and then call ToString():
int value = GetValueFromDb();
var enumDisplayStatus = (EnumDisplayStatus)value;
string stringValue = enumDisplayStatus.ToString();
...
Why does Python use 'magic methods'?
...lable, an object implements a method, def __len__(self) , and then it is called when you write len(obj) .
7 Answers
...
List submodules in a Git repository
...t repository that has several submodules in it. How do I list the names of all the submodules after git submodule init has been run?
...
How to resolve symbolic links in a shell script
...ircumstances, namely if the symlink of interest is to a directory that actually exists; plus, you must cd to it first, before calling pwd -P. In other words: it won't allow you to resolve (see the target of) symlinks to files or of broken symlinks, and for resolving existing-directory symlinks you h...
Haskell function composition (.) and function application ($) idioms: correct use
... Is there a reason for using the books way that is much better than using all ($) symbols?
There's no special reason. Bryan and I both prefer to reduce line noise. . is quieter than $. As a result, the book uses the f . g . h $ x syntax.
...
Showing which files have changed between two revisions
...
This has come in handy especially with large branches containing a lot of differences.
– vandsh
Apr 7 '15 at 18:07
...
A simple explanation of Naive Bayes Classification
... & part two being the confusion surrounding Training set.
In general all of Machine Learning Algorithms need to be trained for supervised learning tasks like classification, prediction etc. or for unsupervised learning tasks like clustering.
During the training step, the algorithms are taught...
.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included i
...starting below this like copy pasted list in here
# Example:
# LoadModule foo_module modules/mod_foo.so
LoadModule access_compat_module modules/mod_access_compat.so
LoadModule actions_module modules/mod_actions.so
LoadModule alias_module modules/mod_alias.so
LoadModule allowmethods_module modules/...