大约有 30,000 项符合查询结果（耗时：0.0512秒） [XML]
[] and {} vs list() and dict(), which is better?
...ms of speed, it's no competition for empty lists/dicts:
>>> from timeit import timeit
>>> timeit("[]")
0.040084982867934334
>>> timeit("list()")
0.17704233359267718
>>> timeit("{}")
0.033620194745424214
>>> timeit("dict()")
0.1821558326547077
and for n...
Understanding Spliterator, Collector and Stream in Java 8
... variable, either. Stream is sort of like an Iterator, in that it's a one-time-use object that you'll almost always use in a fluent chain, as in the Javadoc example:
int sum = widgets.stream()
.filter(w -> w.getColor() == RED)
.mapToInt(w -> w.getWeight())...
Count the number of commits on a Git branch
...to a topic branch tend to be only about adjusting to updated upstream from time to time, and this option allows you to ignore the individual commits brought in to your history by such a merge. Cannot be combined with --bisect.
Note: Shallow clone will shrink the history size. E.g. if you clone with...
Quickest way to convert a base 10 number to any base in .NET?
...e best case (i.e. the longest possible input) this method is roughly three times faster. However, for 1-digit numbers (i.e. 1-digit in the target base), IntToString will be faster.
share
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improve ...
How to execute a MySQL command from a shell script?
...l commands like the above on the command line and in shell scripts all the time. It's hard to diagnose what's wrong with your shell script, because you haven't shared the exact script or any error output. I suggest you edit your original question above and provide examples of what goes wrong.
Als...
Using headers with the Python requests library's get method
...
@Breedly Right place, right time. Story of my life: remarkable amount of good luck combined with a ton of hard work.
– cwallenpoole
Feb 2 '18 at 21:26
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PHP - find entry by object property from an array of objects
...either iterate the array, searching for the particular record (ok in a one time only search) or build a hashmap using another associative array.
For the former, something like this
$item = null;
foreach($array as $struct) {
if ($v == $struct->ID) {
$item = $struct;
break;
...
Set attributes from dictionary in python
...solve a problem. Either:
You know what all the fields should be ahead of time. In that case, you can set all the attributes explicitly. This would look like
class Employee(object):
def __init__(self, name, last_name, age):
self.name = name
self.last_name = last_name
se...
CSS scrollbar style cross browser [duplicate]
...
@jmendeth Well, I did not take the time to test it all myself, but according to this page it should work for IE, Chrome, Firefox. And according to this forum thread the IE style rules also work(ed?) in Opera, but only on the main page scrollbars. Not on those ...
Can't install RMagick 2.13.1. Can't find MagickWand.h.
... @JonathonHorsman Correct me if I am wrong, but this your first time installing anything ImageMagick ? In order for rmagick gem to function you need ImageMagick developer libraries, and all of their associated dependencies. So unfortunately, yes you do need all of those packages. On th...