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Why malloc+memset is slower than calloc?
...pen this way. There are three major differences.
When your process gets new memory from the kernel, that memory was probably used by some other process previously. This is a security risk. What if that memory has passwords, encryption keys, or secret salsa recipes? To keep sensitive data from ...
Random number from a range in a Bash Script
... that the code references $RANDOM twice. On shells that support $RANDOM, a new value is generated every time it is referenced. So this code fills bits 0 through 14 with one $RANDOM value & fills bits 15 through 29 with another. Assuming $RANDOM is uniform & independent, this covers all value...
How to get body of a POST in php?
...have the pecl/http extension installed, you can also use this:
$request = new http\Env\Request();
$request->getBody();
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Swift to Objective-C header not created in Xcode 6
...ch revealed a bunch of other errors in my Swift code.
Once I fixed these new errors and got the source building successfully, I uncommented out the #import and bingo! The header was created and importing correctly :)
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Turn off spell checking in Eclipse for good
Every time I create a new workspace in Eclipse I have to turn off the spell checking via Preferences. (Preferences->General->Editors->Text Editors->Spelling->Enable Spell Checking)
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Text size and different android screen sizes
... and screen sizes—in
particular, 7" tablets—Android 3.2 introduces a new way to specify
resources for more discrete screen sizes. The new technique is based
on the amount of space your layout needs (such as 600dp of width),
rather than trying to make your layout fit the generalized size ...
Delete text in between HTML tags in vim?
...g-id"> -- with cursor at first ", hit ci" and be dropped into inserting new characters between the quotes.
– Alex Moore-Niemi
Apr 26 '15 at 16:49
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Key hash for Android-Facebook app
...");
md.update(signature.toByteArray());
String something = new String(Base64.encode(md.digest(), 0));
//String something = new String(Base64.encodeBytes(md.digest()));
Log.e("hash key", something);
}
} catch (NameNotFoundException e1) {
Log.e("name not found",...
Convert a Python list with strings all to lowercase or uppercase
...form of [function-of-item for item in some-list]. For example, to create a new list where all the items are lower-cased (or upper-cased in the second snippet), you would use:
>>> [x.lower() for x in ["A","B","C"]]
['a', 'b', 'c']
>>> [x.upper() for x in ["a","b","c"]]
['A', 'B', ...
How to convert all tables from MyISAM into InnoDB?
... @GajendraBang - Yes, the answer as valid when presented. But for newcomers, it is no longer valid. My intent was to warn against using it as is.
– Rick James
Jan 19 '17 at 22:47
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