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Remove unwanted parts from strings in a column
... @LucaGuarro from the python docs: "The r prefix, making the literal a raw string literal, is needed in this example because escape sequences in a normal “cooked” string literal that are not recognized by Python, as opposed to regular expressions, now result in a DeprecationWarning and will ...
How to import CSV file data into a PostgreSQL table?
...re's some code that shows you how to set various options:
# Set it so the raw sql output is logged
import logging
logging.basicConfig()
logging.getLogger('sqlalchemy.engine').setLevel(logging.INFO)
df.to_sql("my_table_name2",
engine,
if_exists="append", #options are ‘fail...
How to convert SecureString to System.String?
...
If you want to avoid creating a managed string object, you can access the raw data using Marshal.ReadInt16(IntPtr, Int32):
void HandleSecureString(SecureString value) {
IntPtr valuePtr = IntPtr.Zero;
try {
valuePtr = Marshal.SecureStringToGlobalAllocUnicode(value);
for (int i=0; i <...
How do you copy the contents of an array to a std::vector in C++ without looping?
...C-style arrays are perfectly valid containers for most STL algorithms--the raw pointer is equivalent to begin(), and (ptr + n) is equivalent to end().
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Do I have to guard against SQL injection if I used a dropdown?
...mysqli. Mostly by accident, I presume, but anyway, I have to warn you that raw mysqli is not an adequate substitution for the old mysq_* functions. Simply because if used in the old style, it will add no security at all. While it's support for the prepared statements is painful and troublesome, to t...
How to get Linux console window width in Python
... left, top, right, bottom, maxx, maxy) = struct.unpack("hhhhHhhhhhh", csbi.raw)
sizex = right - left + 1
sizey = bottom - top + 1
return sizex, sizey
else:
return None
def _getTerminalSize_tput():
# get terminal width
# src: http://stackoverflow.com/quest...
Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
... end with some profiling stats on why @User's drop solution is slower than raw column based filtration:-
%timeit df_new = df[(df.E>0)]
345 µs ± 10.5 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
%timeit dft.drop(dft[dft.E < 0].index, inplace=True)
890 µs ± 94.9 µs per loo...
How can I rename a database column in a Ruby on Rails migration?
...nd doing one row at a time. The migration would execute much faster with raw sql statements to update correctly named columns. For example, in the first db migration script, after adding the duplicate column names, execute "Update table_name set correct_name_column_one = old_name_column_one"
...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...d all the bcrypt hashed passwords to the new hashes? Wouldnt they need the raw passwords to hash it using the new algorithm?
– Dharmendar Kumar 'DK'
Jan 6 '14 at 22:44
8
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How to create a trie in Python
... may take up to 50x-100x less memory than
in a standard Python dict; the raw lookup speed is comparable; trie
also provides fast advanced methods like prefix search.
Based on marisa-trie C++ library.
Here's a blog post from a company using marisa trie successfully:
https://www.repustate.c...