大约有 31,500 项符合查询结果（耗时：0.0366秒） [XML]
How do I count the number of occurrences of a char in a String?
...
The loop method is much faster than this. Especially when wanting to count a char instead of a String (since there is no String.replace(char, char) method). On a 15 character string, I get a difference of 6049 ns vs 26,739 ns (averaged over 100runs). Raw numbers are huge...
How to read and write excel file
...org/apidocs/org/apache/poi/hssf/usermodel/…
– nicolallias
Dec 23 '14 at 14:18
1
In my attempts ...
NSNotificationCenter addObserver in Swift
...)
NSNotificationCenter.defaultCenter().removeObserver(self) // Remove from all notifications being observed
Method handler for received Notification
func methodOfReceivedNotification(notification: NSNotification) {
// Take Action on Notification
}
Annotate either the class or the target metho...
Regular expressions in C: examples?
...
Regular expressions actually aren't part of ANSI C. It sounds like you might be talking about the POSIX regular expression library, which comes with most (all?) *nixes. Here's an example of using POSIX regexes in C (based on this):
#include <reg...
I need to securely store a username and password in Python, what are my options?
I'm writing a small Python script which will periodically pull information from a 3rd party service using a username and password combo. I don't need to create something that is 100% bulletproof (does 100% even exist?), but I would like to involve a good measure of security so at the very least it w...
How can I break up this long line in Python?
...rately on each line, or to the whole lot from outside the parentheses.
Finally, you can use triple-quoted strings:
"""This is the first line of my text
which will be joined to a second."""
This is often my favorite, though its behavior is slightly different as the newline and any leading whitesp...
How to determine if a string is a number with C++?
...rote the below function which I believe was working smoothly (or I accidentally edited to stop it or I'm schizophrenic or Windows is schizophrenic):
...
How to test if string exists in file with Bash?
...ve to omit the -q option, and detect errors based on the exit status:
Normally, the exit status is 0 if selected lines are found and 1 otherwise. But the exit status is 2 if an error occurred, unless the -q or --quiet or --silent option is used and a selected line is found. Note, however, that POSI...
What does the “map” method do in Ruby?
...
Ahhh I get it. So .map actually mutates the array while .each just loops through the array to access the values while leaving the original array untouched?
– bigpotato
Aug 23 '12 at 4:18
...
Change the color of a bullet in a html list?
All I want is to be able to change the color of a bullet in a list to a light gray. It defaults to black, and I can't figure out how to change it.
...