大约有 40,200 项符合查询结果（耗时：0.0487秒） [XML]
What is “vectorization”?
...ead of processing a single element of an array N times, it processes (say) 4 elements of the array simultaneously N/4 times.
(I chose 4 because it's what modern hardware is most likely to directly support; the term "vectorization" is also used to describe a higher level software transformation wher...
lodash multi-column sortBy descending
...
341
As of lodash 3.5.0 you can use sortByOrder (renamed orderBy in v4.3.0):
var data = _.sortByOrd...
Ways to save enums in database
...
164
We never store enumerations as numerical ordinal values anymore; it makes debugging and support ...
How can I match a string with a regex in Bash?
...
To match regexes you need to use the =~ operator.
Try this:
[[ sed-4.2.2.tar.bz2 =~ tar.bz2$ ]] && echo matched
Alternatively, you can use wildcards (instead of regexes) with the == operator:
[[ sed-4.2.2.tar.bz2 == *tar.bz2 ]] && echo matched
If portability is not a con...
Why use a prime number in hashCode?
...
104
Because you want the number you are multiplying by and the number of buckets you are inserting i...
Pythonic way to combine FOR loop and IF statement
...
340
You can use generator expressions like this:
gen = (x for x in xyz if x not in a)
for x in ge...
How to check if a specified key exists in a given S3 bucket using Java
...he details of the object (not the contents) of the object. It will throw a 404 if the object is missing. So you can catch that exception and deal with it in your app.
But in order for this to work, you will need to have ListBucket access for the user on that bucket. Just GetObject access will not ...
Can I start the iPhone simulator without “Build and Run”?
...ons/Xcode.app/Contents/Developer/Applications/iOS Simulator.app.
Xcode 4.x, 5.x
In Xcode 4.x (through 4.5 on Mountain Lion) and Xcode 5.0.x on Mavericks, it lives here: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/
In my version of Xcode...
How to show all shared libraries used by executables in Linux?
...
274
Use ldd to list shared libraries for each executable.
Cleanup the output
Sort, compute counts, ...
What is the use of the ArraySegment class?
...
ArraySegment<T> has become a lot more useful in .NET 4.5+ and .NET Core as it now implements:
IList<T>
ICollection<T>
IEnumerable<T>
IEnumerable
IReadOnlyList<T>
IReadOnlyCollection<T>
as opposed to the .NET 4 version which implemented no inter...