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How to allocate aligned memory only using the standard library?
I just finished a test as part of a job interview, and one question stumped me, even using Google for reference. I'd like to see what the StackOverflow crew can do with it:
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Is there any way to put malicious code into a regular expression?
...is a denial‐of‐service attack through pathological patterns that go exponential — or even super‐exponential! — and so appear to take forever to solve. These may only show up on particular input data, but one can generally create one wherein this doesn’t matter.
Which ones these are will...
Why should Java ThreadLocal variables be static
...t, etc. You don't want them also sub-scoped to the instance of the class.
One web request => one Persistence session.
Not one web request => one persistence session per object.
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improv...
Is floating-point math consistent in C#? Can it be?
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I have learned about one special case where floating points are deterministic. Explanation I got is: For multiplication/division, if one of the FP numbers is power of two number (2^x), significant/mantissa won't change during calculation. Only ex...
Printing leading 0's in C?
...use "%02d" (Useful for dates) this would only pad zeros for numbers in the ones column ie.(06 instead of 6). Example 2, "%03d" would pad 2 zeros for one number in the ones column and pad 1 zero for a number in the tens column. ie. (number 7 padded to 007 and number 17 padded to 017).
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Argparse optional positional arguments?
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Use nargs='?' (or nargs='*' if you will need more than one dir)
parser.add_argument('dir', nargs='?', default=os.getcwd())
extended example:
>>> import os, argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument('-v', action='store_t...
How to set DialogFragment's width and height?
...arent"
android:layout_height="match_parent"
You only have to worry about one place (place it in your DialogFragment#onResume). Its not perfect, but at least it works for having a RelativeLayout as the root of your dialog's layout file.
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How do I import CSV file into a MySQL table?
...refactor into a sane format. I created a table called 'CSVImport' that has one field for every column of the CSV file. The CSV contains 99 columns , so this was a hard enough task in itself:
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MySql Table Insert if not exist otherwise update
...ERT ... ON DUPLICATE KEY UPDATE on tables against a table having more than one unique or primary key. Taken from MySQL documentation: In addition, beginning with MySQL 5.5.24, an INSERT ... ON DUPLICATE KEY UPDATE statement against a table having more than one unique or primary key is also marked a...
Serialize an object to string
...() instead of typeof(T) in XmlSerializer constructor: if you use the first one the code covers all possible subclasses of T (which are valid for the method), while using the latter one will fail when passing a type derived from T.
Here is a link with some example code that motivate this stateme...