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How many GCC optimization levels are there?
...ted there were 7 options. GCC has since added -Og to bring the total to 8
From the man page:
-O (Same as -O1)
-O0 (do no optimization, the default if no optimization level is specified)
-O1 (optimize minimally)
-O2 (optimize more)
-O3 (optimize even more)
-Ofast (optimize very ag...
How do I execute a command and get the output of the command within C++ using POSIX?
...} /* switch (pid = fork())*/
}
You also might want to play around with select() and non-blocking reads.
fd_set readfds;
struct timeval timeout;
timeout.tv_sec = 0; /* Seconds */
timeout.tv_usec = 1000; /* Microseconds */
FD_ZERO(&readfds);
FD_SET(childToParent[READ_FD], &...
Simulating tremor (from e.g. Parkinson's Disease) with the mouse on a webpage?
...ontained in app.js, in the canvasLoop(e) method.
The only thing I changed from the original demo was after the lines
x += movementX * 2;
y += movementY * 2;
I added two lines to represent random movement:
x += Math.floor(Math.random()*3 - 1);
y += Math.floor(Math.random()*3 - 1);
There are st...
Finding Number of Cores in Java
How can I find the number of cores available to my application from within Java code?
4 Answers
...
Inspect element that only appear when other element is mouse overed/entered
...to the Elements panel and use the magnifying glass icon in the top left to select the tooltip
If the tooltip shows up because of CSS, here's what you can do in that case:
Step-by-step:
Open the DevTools
Select the triggering element in the dev tools (the link)
Right click, and select "force el...
import module from string variable
...ich I hope will automate document generation from future MPL releases.
I selected interested submodules/packages and want to list their main classes from which I'll generate list and process it with pydoc
...
Using numpad in Vi (Vim) via PuTTY
...Mac Terminal app, try Preferences --> Profiles --> Advanced --> deselect "Allow VT100 application keypad mode"
– HaPsantran
Nov 12 '14 at 15:36
...
Linux equivalent of the Mac OS X “open” command [closed]
I've found the "open" command in Mac OS X very handy in the command line. From "man open":
7 Answers
...
PHP script - detect whether running under linux or Windows?
... placed on a windows system or a linux system. I need to run different commands in either case.
14 Answers
...
How to best position Swing GUIs?
... competitions, I often have to search for the loop index to, say, +1 or -1 from it to fix off by one errors. In those cases, searching for ii is much easier than searching for i, regardless of which editor I used. Similarly, I use jj and kk for the nested loop indexes. :)
– mus...