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Creating C formatted strings (not printing them)
...per(const char *format, ...) {
char* string;
va_list args;
va_start(args, format);
if(0 > vasprintf(&string, format, args)) string = NULL; //this is for logging, so failed allocation is not fatal
va_end(args);
if(string) {
log_out(string);
free(str...
How to 'insert if not exists' in MySQL?
I started by googling, and found this article which talks about mutex tables.
10 Answers
...
MySQL maximum memory usage
...th EXPLAIN. Add to that that MySQL's EXPLAIN is really limited, but it's a start.
Suggested configurations
About these my-large.cnf and my-medium.cnf files -- I don't even know who those were written for. Roll your own.
Tuning primer
A great start is the tuning primer. It's a bash script (hint: ...
Appending the same string to a list of strings in Python
...ments:', len(l)
l1 = list( l )
l2 = list( l )
# Method A
start_time = time.time()
l2 = [s + mystring for s in l2]
stop_time = time.time()
dt1 = stop_time - start_time
del l2
#~ print "Method A: %s seconds" % (dt1)
# Method B
start_time = time.time()
...
What is a “bundle” in an Android application
...ionContext(), SecondActivity.class);
intent.putExtra("myKey", AnyValue);
startActivity(intent);
You can get the passed values by doing:
Bundle extras = intent.getExtras();
String tmp = extras.getString("myKey");
You can find more info at:
android-using-bundle-for-sharing-variables and
Pass...
How can I recover the return value of a function passed to multiprocessing.Process?
...cess(target=worker, args=(i,return_dict))
jobs.append(p)
p.start()
for proc in jobs:
proc.join()
print return_dict.values()
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AngularJS and its use of Dollar Variables
...fixed properties, for example the 'json' filter will not output a variable starting with '$'.
– Schmuli
Dec 27 '12 at 20:48
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What is the difference between mutex and critical section?
...;
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
LARGE_INTEGER start, end;
// Force code into memory, so we don't see any effects of paging.
EnterCriticalSection(&critSec);
LeaveCriticalSection(&critSec);
QueryPerformanceCounter(&start);
for (int i = 0; i < 1000000; i++)
...
How to benchmark efficiency of PHP script
...in the callgraph collected.
Once the extension is compiled and loaded you start profiling in the code with:
xhprof_enable(XHPROF_FLAGS_CPU + XHPROF_FLAGS_MEMORY);
To stop:
$xhprof_data = xhprof_disable();
Then save the data to a file, or database - whatever floats your boath and doesn't inter...
Mercurial move changes to a new branch
...
summary: initial
This means, revision 0 is the base on which you started to work on your feature. Now you want to have revisions 1-2 on a named branch, let's say my-feature. Update to revision 0 and create that branch:
$ hg up 0
$ hg branch my-feature
$ hg ci -m "start new branch my-featu...