大约有 46,000 项符合查询结果（耗时：0.0619秒） [XML]
Is it better to reuse a StringBuilder in a loop?
...ion {
long time = System.currentTimeMillis();
for( int i = 0; i < 10000000; i++ ) {
StringBuilder sb = new StringBuilder();
sb.append( "someString" );
sb.append( "someString2"+i );
sb.append( "someStrin4g"+i );
sb.append(...
how to override left:0 using CSS or Jquery?
...
answered Apr 11 '12 at 9:06
Jan HančičJan Hančič
48.2k1515 gold badges8787 silver badges9494 bronze badges
...
Meaning of $? (dollar question mark) in shell scripts
...executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$? Expands to the exit status of the most recen...
The thread has exited with code 0 (0x0) with no unhandled exception
...
BlueMBlueM
5,40411 gold badge2121 silver badges2727 bronze badges
add a com...
How do I validate a date string format in python?
...r("Incorrect data format, should be YYYY-MM-DD")
>>> validate('2003-12-23')
>>> validate('2003-12-32')
Traceback (most recent call last):
File "<pyshell#20>", line 1, in <module>
validate('2003-12-32')
File "<pyshell#18>", line 5, in validate
raise ...
anchor jumping by using javascript
...
208
You can get the coordinate of the target element and set the scroll position to it. But this is...
Why is JSHINT complaining that this is a strict violation?
...
function gotoPage(sorter, s) {
if (s <= sorter.d && s > 0) {
sorter.g = s;
sorter.page((s - 1) * sorter.p.size);
}
}
function pageChange(event, sorter) {
var dd = event.currentTarget;
gotoPage(sorter, dd[dd.selectedIndex].value);
}
...
Sorting an ArrayList of objects using a custom sorting order
...anComparator(String field) {
this.getter = "get" + field.substring(0, 1).toUpperCase() + field.substring(1);
}
public int compare(Object o1, Object o2) {
try {
if (o1 != null && o2 != null) {
o1 = o1.getClass().getMethod(getter, new Class[...
What is the difference between user and kernel modes in operating systems?
... |
edited Mar 24 '14 at 0:07
Chris Simmons
6,01855 gold badges2828 silver badges4545 bronze badges
ans...
How do I negate a test with regular expressions in a bash script?
Using GNU bash (version 4.0.35(1)-release (x86_64-suse-linux-gnu), I would like to negate a test with Regular Expressions. For example, I would like to conditionally add a path to the PATH variable, if the path is not already there, as in:
...