大约有 45,000 项符合查询结果（耗时：0.0558秒） [XML]
Converting NSString to NSDate (and back again)
...
Swift 4 and later
Updated: 2018
String to Date
var dateString = "02-03-2017"
var dateFormatter = DateFormatter()
// This is important - we set our input date format to match our input string
// if the format doesn't match y...
Find unique rows in numpy.array
...
Note that if you want unique rows ignoring order of values in the row, you can sort the original array in the columns direct first: original_array.sort(axis=1)
– mangecoeur
Mar 2 at 11:59
...
Why does sudo change the PATH?
...annoying function" prevents you from getting trojaned. I say forcing a specific $PATH is a feature, not a bug---it makes you write out the full path to a program that's outside the $PATH.
– Chris Jester-Young
May 18 '09 at 16:10
...
Grep characters before and after match?
...
What's the significance of the first number in the curly-bracketed pairs? Like the 0s in "grep -E -o ".{0,5}test_pattern.{0,5}" test.txt "?
– Lew Rockwell Fan
Jun 23 '17 at 2:28
...
Custom exception type
Can I define custom types for user-defined exceptions in JavaScript? If so, how would I do it?
13 Answers
...
Is it possible to declare git repository as dependency in android gradle?
...
There is now a new feature in gradle that lets you add source dependencies from git.
You first need to define the repo in the settings.gradle file and map it to a module identifier:
sourceControl {
gitRepository("https://github....
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In ...
Is gcc std::unordered_map implementation slow? If so - why?
...m to be pointing to "fixes" to max_load_factor handling, which led to the difference in performance.
– jxh
Jul 24 '12 at 18:21
...
What is the difference between a generative and a discriminative algorithm?
...
Thanks for the paper. The author is now professor at Stanford and has wonderful resources at stanford.edu/class/cs229/materials.html
– unj2
May 18 '09 at 23:08
...
What is the 'override' keyword in C++ used for? [duplicate]
...o the parent class/interface) is removed (not alternated). This is useful if the subclass is expecting a callback but it will never happen due to the library change, etc.
– Hei
Mar 11 '18 at 5:32
...