大约有 47,000 项符合查询结果（耗时：0.0610秒） [XML]
How to round an average to 2 decimal places in PostgreSQL?
...
For those trying to find the comment by @Catcall : now it is Mike Sherrill 'Cat Recall'
– 18446744073709551615
Apr 7 '16 at 7:35
|...
How do I use extern to share variables between source files?
I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope?
...
Linq to Entities - SQL “IN” clause
...ession. That's terribly ugly, but I'm afraid it's the only way to go right now.
Now well, that looks like this:
Queue<Guid> productIds = new Queue<Guid>(Products.Select(p => p.Key));
if(productIds.Count > 0)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}.P...
Build fat static library (device + simulator) using Xcode and SDK 4+
... files, PLIST files etc from your library!) - see below (scroll to bottom)
now supports iPhone5 (using Apple's workaround to the bugs in lipo). NOTE: the install instructions have changed (I can probably simplify this by changing the script in future, but don't want to risk it now)
"copy headers" se...
iOS JavaScript bridge
...going to use both HTML5 in UIWebView and native iOS framework together. I know that I can implement communication between JavaScript and Objective-C. Are there any libraries that simplify implementing this communication? I know that there are several libraries to create native iOS apps in HTML5 and ...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
...$VAR is empty.
Your version does not work because it evaluates to [ -e ]. Now in this case, bash simply checks if the single argument (-e) is a non-empty string.
From the manpage:
test and [ evaluate conditional expressions using a set of rules based on the number of arguments. ...
1 argu...
How does one generate a random number in Apple's Swift language?
...n one's own program? Or is there a library that does this that we can use now?
25 Answers
...
Git: Ignore tracked files
...e "here's a base template of a file where you'd store your credentials in, now never commit it".
– Jon V
Jan 20 '17 at 22:01
6
...
Check whether a variable is a string in Ruby
...
Without knowing the question's intent, I'd say for most real-world programming situations, is_a? is actually the more appropriate idiom to use (and often a duck-typing check like Andrew Grimm mentions is even better). A strict class c...
Difference between LoadFile and LoadFrom with .NET Assemblies?
...embly2 = Assembly.LoadFile(path2);
// These point to different assemblies now, so this is false
Console.WriteLine(assembly1.CodeBase == assembly2.CodeBase);
Edit: to answer the questions you raised in your revised question, you definitely want to read Suzanne Cook on Assembly Identity.
There a...