大约有 35,450 项符合查询结果（耗时：0.0368秒） [XML]
What is the right way to check for a null string in Objective-C?
...
20 Answers
20
Active
...
How can I add an item to a SelectList in ASP.net MVC
... insert an item at the beginning of a SelectList with the default value of 0 and the Text Value of " -- Select One --"
13 A...
How can I measure the speed of code written in PHP? [closed]
...
10 Answers
10
Active
...
Prevent Caching in ASP.NET MVC for specific actions using an attribute
...
307
To ensure that JQuery isn't caching the results, on your ajax methods, put the following:
$.aj...
How to break out of a loop in Bash?
...
It's not that different in bash.
done=0
while : ; do
...
if [ "$done" -ne 0 ]; then
break
fi
done
: is the no-op command; its exit status is always 0, so the loop runs until done is given a non-zero value.
There are many ways you could set and te...
How do I install an old version of Django on virtualenv?
...
There was never a Django 1.0.7. The 1.0 series only went up to 1.0.4. You can see all the releases in the tags section of the Django code repository.
However to answer your question, don't use easy_install, use pip. (If it's not already installed, do ...
Iterating Through a Dictionary in Swift
...
360
Dictionaries in Swift (and other languages) are not ordered. When you iterate through the dictio...
Multiple commands on a single line in a Windows batch file
...ng on delayed expansion:
pax> cmd /v:on /c "echo !time! & ping 127.0.0.1 >nul: & echo !time!"
15:23:36.77
15:23:39.85
That's needed from the command line. If you're doing this inside a script, you can just use setlocal:
@setlocal enableextensions enabledelayedexpansion
@echo off
ec...
How do you round a float to two decimal places in jruby
...
answered May 5 '12 at 16:06
steenslagsteenslag
71.2k1414 gold badges126126 silver badges157157 bronze badges
...
Which, if any, C++ compilers do tail-recursion optimization?
...s such as:
int bar(int, int);
int foo(int n, int acc) {
return (n == 0) ? acc : bar(n - 1, acc + 2);
}
int bar(int n, int acc) {
return (n == 0) ? acc : foo(n - 1, acc + 1);
}
Letting the compiler do the optimisation is straightforward: Just switch on optimisation for speed:
For MSVC,...