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Which is faster: while(1) or while(2)?
... enough to optimize such trivial cases. Programmers should not waste their time thinking about them in the vast majority of cases.
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Show current assembly instruction in GDB
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You can do
display/i $pc
and every time GDB stops, it will display the disassembly of the next instruction.
GDB-7.0 also supports set disassemble-next-line on, which will disassemble the entire next line, and give you more of the disassembly context.
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When should I use a struct instead of a class?
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I would use structs when:
an object is supposed to be read only(every time you pass/assign a struct it gets copied). Read only objects are great when it comes to multithreaded processing as they don't requite locking in most cases.
an object is small and short-living. In such a case there is a...
“simple” vs “current” push.default in git for decentralized workflow
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Revisiting my own question after a long time :-) How did current know which remote to choose? If you don't have a tracking branch set, where does it push to?
– void.pointer
May 11 '17 at 21:13
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List of ANSI color escape sequences
...3 ║ Italic ║ Not widely supported. Sometimes treated as inverse. ║
║ 4 ║ Underline ║ ║
║ 5 ║ Slow Blink ...
Run a Python script from another Python script, passing in arguments [duplicate]
...nce has no main or functions.... an import would execute the script at the time of import, which probably isn't what you want (and you don't want to refactor it because people are also using that script as is). os/subprocess could deal with such a case
– Dan S
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How can I rename a database column in a Ruby on Rails migration?
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Turadg - *it'll know how to rollback most of the time. I find the change method isn't full proof, so tend to use up and down methods for complex migrations.
– JellyFishBoy
Oct 19 '14 at 9:20
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Should I initialize variable within constructor or outside constructor [duplicate]
...r)
{
this.arr=arr;
}
}
So depending on the situation sometime you will have to initialize in the top and sometimes in a constructor.
FYI other option's for initialization without using a constructor :
class Foo
{
int i;
static int k;
//instance initializer block
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Javascript - Track mouse position
... page. (Tested on IE8, IE11, Firefox 30, Chrome 38.)
If you really need a timer-based solution, you combine this with some state variables:
(function() {
var mousePos;
document.onmousemove = handleMouseMove;
setInterval(getMousePosition, 100); // setInterval repeats every X ms
fu...
how to customize `show processlist` in mysql?
I want to order by Time,but seems no way to do that ?
6 Answers
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