大约有 40,000 项符合查询结果（耗时：0.0391秒） [XML]
How do I get a file's directory using the File object?
...
If you do something like this:
File file = new File("test.txt");
String parent = file.getParent();
parent will be null.
So to get directory of this file you can do next:
parent = file.getAbsoluteFile().getParent();
...
Ways to save enums in database
...for example:
public enum Boolean {
TRUE, FALSE
}
public class BooleanTest {
@Test
public void testEnum() {
assertEquals(0, Boolean.TRUE.ordinal());
assertEquals(1, Boolean.FALSE.ordinal());
}
}
If you stored this as ordinals, you might have rows like:
> SELECT...
Xcode: failed to get the task for process
...rget is selected, and that you aren't adjusting code sign settings for the test/other target.
– Vincil Bishop
Jan 12 '15 at 16:41
11
...
Functional programming - is immutability expensive? [closed]
...sing primitives, which may have to be boxed/unboxed. You're not trying to test the overhead of wrapping primitive objects, you're trying to test immutability.
You've chosen an algorithm where in-place operation is unusually effective (and provably so). If you want to show that there exist algorith...
Manipulating an Access database from Java without ODBC
...tion conn=DriverManager.getConnection(
"jdbc:ucanaccess://C:/__tmp/test/zzz.accdb");
Statement s = conn.createStatement();
ResultSet rs = s.executeQuery("SELECT [LastName] FROM [Clients]");
while (rs.next()) {
System.out.println(rs.getString(1));
}
Disclosure
At the time of writin...
How to backup a local Git repository?
...re in git config (eg. only keep 3 backups for a repo - like rotate...)
# - TESTING
# allow calling from other scripts
def git_backup
# constants:
git_dir_name = '.git' # just to avoid magic "strings"
filename_suffix = ".git.bundle" # will be added to the filename of the created ba...
How can I catch a 404?
...
I haven't tested this, but it should work
try
{
// TODO: Make request.
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError) {
HttpWebResponse resp = ex.Response as HttpWebResponse;
if ...
Difference between const & const volatile
... marked as being volatile, a couple problems might occur:
the while loop test might read the status register only once, since the compiler could assume that whatever it pointed to would never change (there's nothing in the while loop test or loop itself that could change it). If you entered the f...
In C#, why is String a reference type that behaves like a value type?
...so is not a useful short-cut. Checking for ReferenceEquals(x, y) is a fast test and you can return 0 immediately, and when mixed in with your null-test doesn't even add any more work.
– Jon Hanna
Aug 3 '12 at 11:38
...
How do I lowercase a string in C?
...happens if tolower() is called on a non-ascii a-z char? like '!' or '#'. i tested it on '#' and it seemed to work ok. is this generally true for all ascii chars that aren't letters a-z?
– Tony Stark
Apr 18 '10 at 10:29
...