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How is a CRC32 checksum calculated?
Maybe I'm just not seeing it, but CRC32 seems either needlessly complicated, or insufficiently explained anywhere I could find on the web.
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how do you filter pandas dataframes by multiple columns
...ke you could answer it. Relates to pandas dataframes again. stackoverflow.com/questions/22086619/…
– yoshiserry
Feb 28 '14 at 5:26
1
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Selecting with complex criteria from pandas.DataFrame
... 'month' == FEB]? And maybe include a second columns making the query more complex, newdf where col_month = jan OR feb AND col_day = MONDAY or WENDNESDAY
– yoshiserry
Nov 27 '14 at 22:26
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How to access accelerometer/gyroscope data from Javascript?
I have recently come across a few websites that seems to access the accelerometer or gyroscope on my laptop, detecting changes in orientation or movement.
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How do I pull files from remote without overwriting local files?
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why not just git commit local changes beforing git pull ?
– Don Cheadle
Oct 20 '14 at 14:58
10
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How to generate unique ID with node.js
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355
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Why does ~True result in -2?
...True) is 1.
1 is:
00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 Flip all the bits, add 1 to the resulting number and interpret the result as a binary representation of the magnitude and add a negative sign (since the number begins with 1):
11111110 → 00000001 → 0000001...
Format a date using the new date time API
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36
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Can I set a breakpoint on 'memory access' in GDB?
...point 2: *0xfeedface
but one limitation applies to the rwatch and awatch commands; you can't use gdb variables
in expressions:
gdb$ rwatch $ebx+0xec1a04f
Expression cannot be implemented with read/access watchpoint.
So you have to expand them yourself:
gdb$ print $ebx
$13 = 0x135700
gdb$ rwa...
Running a specific test case in Django when your app has a tests directory
The Django documentation ( http://docs.djangoproject.com/en/1.3/topics/testing/#running-tests ) says that you can run individual test cases by specifying them:
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