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Creating a “logical exclusive or” operator in Java
...pecially useful if the second operand would results in an error.
e.g.
if (set == null || set.isEmpty())
// or
if (list != null && list.size() > 0)
However with XOR, you always have to evaluate the second operand to get the result so the only meaningful operation is ^.
...
Providing white space in a Swing GUI
... 'crowded'. How can I provide white space without resorting to explicitly setting the position or size of components?...
How to change the background color of the options menu?
...arate item background, for example it will add borders to each item if you set such background (with borders)...
– user25
May 3 '18 at 19:53
1
...
How to print register values in GDB?
... works as of GDB 7.7.1
As of GDB 7.7.1, the command you've tried works:
set $eax = 0
p $eax
# $1 = 0
set $eax = 1
p $eax
# $2 = 1
This syntax can also be used to select between different union members e.g. for ARM floating point registers that can be either floating point or integers:
p $s0.f
...
How can I get useful error messages in PHP?
...elp you debug errors that are not syntax errors:
error_reporting(-1);
ini_set('display_errors', 'On');
(3) Another option is to use an editor that checks for errors when you type, such as PhpEd. PhpEd also comes with a debugger which can provide more detailed information. (The PhpEd debugger is v...
Map function in MATLAB?
... editor after snippets, if snippets enabled
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Show AlertDialog in any position of the screen
...the solution.
The code is posted below:
private CharSequence[] items = {"Set as Ringtone", "Set as Alarm"};
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setItems(items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int i...
Getting pids from ps -ef |grep keyword
...The pattern is normally only matched against the process name. When -f is set, the full command line is used.
If you really want to avoid pgrep, try:
ps -ef | awk '/[k]eyword/{print $2}'
Note the [] around the first letter of the keyword. That's a useful trick to avoid matching the awk comma...
UIView with rounded corners and drop shadow?
... border radius, and drop shadow to v, a UIView:
// border radius
[v.layer setCornerRadius:30.0f];
// border
[v.layer setBorderColor:[UIColor lightGrayColor].CGColor];
[v.layer setBorderWidth:1.5f];
// drop shadow
[v.layer setShadowColor:[UIColor blackColor].CGColor];
[v.layer setShadowOpacity:0.8...
Using python “with” statement with try-except block
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