大约有 47,000 项符合查询结果（耗时：0.0657秒） [XML]
Read input from console in Ruby?
...
230
Are you talking about gets?
puts "Enter A"
a = gets.chomp
puts "Enter B"
b = gets.chomp
c = a.t...
How can I pad an integer with zeros on the left?
...
Use java.lang.String.format(String,Object...) like this:
String.format("%05d", yournumber);
for zero-padding with a length of 5. For hexadecimal output replace the d with an x as in "%05x".
The full formatting options are documented as part of java.util.Formatter.
...
Select records from NOW() -1 Day
...
280
Judging by the documentation for date/time functions, you should be able to do something like:
...
MySQL: Insert record if not exists in table
...tnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'Somewhere', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'Rupert'
) LIMIT 1;
Query OK, 1 row affected (0.00 sec)
Records: 1 Duplicates: 0 Warnings: 0
SELECT * FROM `table_listnames`;
+----+------...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
...
2130
Real, User and Sys process time statistics
One of these things is not like the other. Real ref...
How to assign a Git SHA1's to a file without Git?
...SHA1 for a file (or, in Git terms, a "blob"):
sha1("blob " + filesize + "\0" + data)
So you can easily compute it yourself without having Git installed. Note that "\0" is the NULL-byte, not a two-character string.
For example, the hash of an empty file:
sha1("blob 0\0") = "e69de29bb2d1d6434b8b2...
Center content of UIScrollView when smaller
...mage is smaller than scrollview then adjust subview.center else center is (0,0).
- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
UIView *subView = [scrollView.subviews objectAtIndex:0];
CGFloat offsetX = MAX((scrollView.bounds.size.width - scrollView.contentSize.width) * 0.5, 0.0);...
Declare slice or make slice?
In Go, what is the difference between var s []int and s := make([]int, 0) ?
4 Answers
...
What is the difference between ManualResetEvent and AutoResetEvent in .NET?
... |
edited Jan 7 '15 at 10:39
Yves M.
24.5k1919 gold badges8989 silver badges118118 bronze badges
answe...
autolayout - make height of view relative to half superview height
...ttribute inspector:
Then you can adjust the multiplier. If you want it 50% of the super view leave it at 1, since it is aligned per the super's center. This is also a great way to create views that are other percentages too (like 25% of super view)
...