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Unicode character as bullet for list-item in CSS
... character is more versatile :P I think backword-compatible or with widest range of browser support would be the word...
– JustGoscha
Aug 4 '14 at 12:03
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Two-way encryption: I need to store passwords that can be retrieved
...attack will also give them full access to the keys involved. Sniffing the raw HTTP traffic will also give them the keys.
Use SSL for all traffic. And make sure nothing on the server has any kind of vulnerabilities (CSRF, XSS, SQL Injection, Privilege Escalation, Remote Code Execution, etc).
Edi...
How to run a shell script on a Unix console or Mac terminal?
...ays available in /bin. While on Linux machines it usually is, there are a range of other POSIX machines where bash ships in various locations, such as /usr/xpg/bin/bash or /usr/local/bin/bash.
To write a portable bash script, we can therefore not rely on hard-coding the location of the bash progra...
Reading a huge .csv file
....csv files in Python 2.7 with up to 1 million rows, and 200 columns (files range from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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How big can a MySQL database get before performance starts to degrade
...e have a single table which is 200+ GiB and a few others in the 50-100 GiB range. Everything I said before holds. It still performs just fine, but the problems of running full dataset operations have become worse.
share
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How can I tell if one commit is a descendant of another commit?
...
This kind of operations relies on the notion of range of revisions detailed in the SO question: "Difference in ‘git log origin/master’ vs ‘git log origin/master..’".
git rev-list should be able to walk back from a commit, up until another if reachable.
So I would...
How can I open multiple files using “with open” in Python?
... print('exit {!r}'.format(self))
return True
xs = [X() for _ in range(3)]
with ExitStack() as stack:
print(len(stack._exit_callbacks)) # number of callbacks called on exit
nums = [stack.enter_context(x) for x in xs]
print(len(stack._exit_callbacks))
print(len(stack._exit_cal...
Wrapping StopWatch timing with a delegate or lambda?
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@Jay I agree that "foreach" with Enumerable.Range looks a bit more "modern", but my tests show that it's about four times slower than a "for" loop over a large count. YMMV.
– Matt Hamilton
Oct 25 '08 at 23:16
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How to use arguments from previous command?
... The word matched by the most recent ‘?string?’ search.
x-y A range of words; ‘-y’ abbreviates ‘0-y’.
* All of the words but the zeroth.
This is a synonym for ‘1-$’.
It is not an error to use * if there is just one word in
the event; t...
Detect and exclude outliers in Pandas data frame
...25)
q3 = df_in[col_name].quantile(0.75)
iqr = q3-q1 #Interquartile range
fence_low = q1-1.5*iqr
fence_high = q3+1.5*iqr
df_out = df_in.loc[(df_in[col_name] > fence_low) & (df_in[col_name] < fence_high)]
return df_out
...