大约有 45,000 项符合查询结果（耗时：0.0665秒） [XML]
Defining an abstract class without any abstract methods
...
If the question can be answered with a simple yes or no, then the asker should consider rephrasing, using Google, or simply trying it out.
– Tyler Treat
Jan 27 '11 at 0:24
...
Default height for section header in UITableView
...(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if(section == CUSTOM_SECTION)
{
return CUSTOM_VALUE;
}
return UITableViewAutomaticDimension;
}
share
|
...
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
...ce {
static MyClass *sharedInstance;
@synchronized(self) {
if (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInstance;
}
The benefit of dispatch_once() over this is that it's faster. It's also semantically cleaner, be...
How to debug PDO database queries?
...fore moving to PDO, I created SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
...
How to merge remote master to local branch
... commits from the branch branchname, and adds them to the current branch. If necessary, it automatically adds a "Merge" commit on top.
git rebase branchname takes new commits from the branch branchname, and inserts them "under" your changes. More precisely, it modifies the history of the current b...
How to give Jenkins more heap space when it´s started as a service under Windows?
...ter -Xmx with the size you want to the arguments-tag (or increase the size if its already there).
share
|
improve this answer
|
follow
|
...
Search All Fields In All Tables For A Specific Value (Oracle)
...m dba_objects WHERE
object_name like '%DTN%'
A column isn't an object. If you mean that you expect the column name to be like '%DTN%', the query you want is:
SELECT owner, table_name, column_name FROM all_tab_columns WHERE column_name LIKE '%DTN%';
But if the 'DTN' string is just a guess on y...
CSS: Control space between bullet and
...
Just to clarify, the <span> tag can be semantic when it is assigned a class, for instance <span class="tel">123-456-7890</span> is implicitly semantic.
– ingyhere
Mar 2 '12 at 2:01...
How can I read a text file in Android?
...
If you have one empty row in your txt doc, this parser will stop working! The solution is to admit having this empty rows: while ((line = br.readLine()) != null) { if(line.length() > 0) { //do your stuff } ...
Why can't strings be mutable in Java and .NET?
...e object can be in
exactly one state, the state in which it was created. If you make sure
that all constructors establish class invariants, then it is
guaranteed that these invariants will remain true for all time, with
no effort on your part.
[...]
Immutable objects are inherently...