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What is Prefix.pch file in Xcode?
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RaffAlRaffAl
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ad...
How do I print a double value with full precision using cout?
... on std::cout and use the std::fixed format specifier.
double d = 3.14159265358979;
cout.precision(17);
cout << "Pi: " << fixed << d << endl;
You can #include <limits> to get the maximum precision of a float or double.
#include <limits>
typedef std::numeric_l...
How to replace NaN values by Zeroes in a column of a Pandas Dataframe?
...1
0 NaN NaN
1 -0.494375 0.570994
2 NaN NaN
3 1.876360 -0.229738
4 NaN NaN
In [8]: df.fillna(0)
Out[8]:
0 1
0 0.000000 0.000000
1 -0.494375 0.570994
2 0.000000 0.000000
3 1.876360 -0.229738
4 0.000000 0.000000
To fill the NaNs in onl...
Simple way to encode a string according to a password?
...ère cipher
It's quick and easy to implement. Something like:
import base64
def encode(key, string):
encoded_chars = []
for i in xrange(len(string)):
key_c = key[i % len(key)]
encoded_c = chr(ord(string[i]) + ord(key_c) % 256)
encoded_chars.append(encoded_c)
en...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
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362
Open a CMD prompt as administrator and execute the following command:
net stop was /y
Open ...
How to check if an email address exists without sending an email?
... Michael
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answered Feb 19 '09 at 16:33
Joseph TaryJoseph Tary
1,24188...
Get a list of checked checkboxes in a div using jQuery
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edited Apr 16 '14 at 12:41
Martin Kapfhammer
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Get all attributes of an element using jQuery
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pimvdbpimvdb
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“Keep Me Logged In” - the best approach
...er, except for the id.
When the user logs in, generate a large (128 to 256 bit) random token. Add that to a database table which maps the token to the userid, and then send it to the client in the cookie.
What if the attacker guesses the random token of another user?
Well, let's do some math he...
How to make MySQL handle UTF-8 properly
... answer - You should almost always be using the utf8mb4 charset and utf8mb4_unicode_ci collation.
To alter database:
ALTER DATABASE dbname CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
See:
Aaron's comment on this answer How to make MySQL handle UTF-8 properly
What's the difference betwee...