大约有 16,000 项符合查询结果（耗时：0.0338秒） [XML]
Why does NULL = NULL evaluate to false in SQL server
...and the IS NULL and IS NOT NULL keywords are the correct way to do it. But why does SQL server behave this way?
18 Answ...
Better way to shuffle two numpy arrays in unison
I have two numpy arrays of different shapes, but with the same length (leading dimension). I want to shuffle each of them, such that corresponding elements continue to correspond -- i.e. shuffle them in unison with respect to their leading indices.
...
How to flatten nested objects with linq expression
I am trying to flatten nested objects like this:
4 Answers
4
...
Default function arguments in Rust
Is it possible in Rust to create a function with a default argument?
6 Answers
6
...
Selecting with complex criteria from pandas.DataFrame
...pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 900
3 8 80 900
4 7 50 200
5 9 30 900
6 ...
Remove HTML tags from a String
...
Use a HTML parser instead of regex. This is dead simple with Jsoup.
public static String html2text(String html) {
return Jsoup.parse(html).text();
}
Jsoup also supports removing HTML tags against a customizable whitelist, which is very useful if you want to allow only e.g. <b>, <i...
new keyword in method signature
...le performing a refactoring, I ended up creating a method like the example below. The datatype has been changed for simplicity's sake.
...
Pointers in C: when to use the ampersand and the asterisk?
...ers, and I'm slightly confused. I know & means the address of a variable and that * can be used in front of a pointer variable to get the value of the object that is pointed to by the pointer. But things work differently when you're working with arrays, strings or when you're calling functio...
Array_merge versus + [duplicate]
When I use array_merge() with associative arrays I get what I want, but when I use them with numerical key arrays the keys get changed.
...
Revert a range of commits in git
...sing?
Reverting multiple commits in only supported in Git1.7.2+: see "Rollback to an old commit using revert multiple times." for more details.
The current git revert man page is only for the current Git version (1.7.4+).
As the OP Alex Spurling reports in the comments:
Upgrading to 1.7.4 works...