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How to fix Git error: object file is empty?
...
+100
I had a similar problem. My laptop ran out of battery during a git operation. Boo.
I didn't have any backups. (N.B. Ubuntu One is ...
Read/write to Windows registry using Java
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+100
Java Native Access (JNA) is an excellent project for working with native libraries and has support for the Windows registry in the p...
How do function pointers in C work?
...swaps the values of a and b")(&a,&b);
Write a for-loop counter to 1000, calling some function each time
((int(*)())"\x66\x31\xc0\x8b\x5c\x24\x04\x66\x40\x50\xff\xd3\x58\x66\x3d\xe8\x03\x75\xf4\xc3")(&function); // calls function with 1->1000
You can even write a recursive function ...
Performance of foreach, array_map with lambda and array_map with static function
...rsion.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
$ret = $func($numbers);
$t1 = microtime(1);
return array($t1 - $t0, $ret);
}
function useForeach($numbers) {
$result = array();
foreach ($numbers as $number) {
$result[] = $number * 10;
}
retur...
How do I determine the size of an object in Python?
...terpret this? Well say you have a set with 10 items in it. If each item is 100 bytes each, how big is the whole data structure? The set is 736 itself because it has sized up one time to 736 bytes. Then you add the size of the items, so that's 1736 bytes in total
Some caveats for function and class d...
Multiple INSERT statements vs. single INSERT with multiple VALUES
I'm running a performance comparison between using 1000 INSERT statements:
4 Answers
4...
Learning assembly [closed]
...led by GCC was about 4kB, while if written by hand in assembly it's around 100 bytes. It's worse on Windows: last time I compared (admittedly, this was last century) the smallest "Hello World" I could get my Windows compiler of then-choice to generate was 52kB! Usually this boilerplate is only execu...
How do I tell Maven to use the latest version of a dependency?
...rsion plugin and check the pom back into source control. It also runs like 100x faster than the mvn versions plugin. Unfortunately it isn't written in a manner for public usage but if people are interested I could make it so and put it in a gist or github.
Going back to workflow as some comments as...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...工作，因此不会阻塞主 UI 线程。这对于在可能需要超过 100 毫秒左右的操作期间获得良好的用户体验非常重要。阻塞主 UI 线程将使您的应用程序看起来“冻结”并变得无响应，用户不喜欢这样。
当您需要执行需要一段时间的数...
What's the fastest way to merge/join data.frames in R?
... 3x slower than data.table and in the second its 200x faster than plyr and 100 times faster than data.table. Below we show the input code, the output timings for the merge and the output timings for the aggregate. Its also worthwhile noting that sqldf is based on a database and therefore can hand...