大约有 47,000 项符合查询结果（耗时：0.0479秒） [XML]
I want to remove double quotes from a String
...s).
Here's how it works:
['"] is a character class, matches both single and double quotes. you can replace this with " to only match double quotes.
+: one or more quotes, chars, as defined by the preceding char-class (optional)
g: the global flag. This tells JS to apply the regex to the entire st...
Confused by python file mode “w+”
... forget this, the f.read() call will try to read from the end of the file, and will return an empty string.
share
|
improve this answer
|
follow
|
...
How to access the ith column of a NumPy multidimensional array?
... reference is reflected in the original array.
– harmands
Oct 18 '16 at 14:21
add a comment
|
...
Best way to select random rows PostgreSQL
I want a random selection of rows in PostgreSQL, I tried this:
12 Answers
12
...
Can (domain name) subdomains have an underscore “_” in it?
...perfectly legal to have
an underscore in a domain name. Let me quote the standard, RFC
2181, section 11, "Name syntax":
The DNS itself places only one restriction on the particular labels
that can be used to identify resource records. That one
restriction relates to the length of the label ...
Remove rows with all or some NAs (missing values) in data.frame
... 1 2 3 2
but using complete.cases is quite a lot more clear, and faster.
share
|
improve this answer
|
follow
|
...
Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby
...
Also, if you want this to be very specific and not "round" the duration, check out Radar's gem: github.com/radar/distance_of_time_in_words. Drop-in replacement for distance_of_time_in_words and you can get the rounded number by passing vague: true as an option.
...
What is the difference between tree depth and height?
...
The difference between them is that in one case you count number of nodes and in other number of edges on the shortest path between root and concrete node.
Which is which?
...
Disable XML validation in Eclipse
My Eclipse validates XML files every time I save a file and it takes a while to validate them.
The project is created using gwt-maven-plugin.
...
Android splash screen image sizes to fit all devices
... have a full screen PNG I want to display on splash. Only one error there, and I have no idea
what size to put in every drawable folder ( ldpi , mdpi , hdpi , and xhdpi ). My application is supposed to run good and beautiful on all phones and tablets. What sizes (in pixels) should I create so the...