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CaseyBCaseyB
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Why were pandas merges in python faster than data.table merges in R in 2012?
... coerce character to
factor. Factors are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R's internal string cache is
utilised (no hash table is built). They are about 4 times faster
t...
Is there a MySQL option/feature to track history of changes to records?
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Octavian Catusanu
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answered Sep 24 '12 at 11:45
Neville KuytNeville Kuy...
How to write string literals in python without having to escape them?
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answered Jan 16 '11 at 3:04
Greg HewgillGreg Hewgill
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How to get the home directory in Python?
...rom os.path import expanduser
home = expanduser("~")
If you're on Python 3.5+ you can use pathlib.Path.home():
from pathlib import Path
home = str(Path.home())
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Counting the number of elements with the values of x in a vector
...an just use table():
> a <- table(numbers)
> a
numbers
4 5 23 34 43 54 56 65 67 324 435 453 456 567 657
2 1 2 2 1 1 2 1 2 1 3 1 1 1 1
Then you can subset it:
> a[names(a)==435]
435
3
Or convert it into a data.frame if you're more comfor...
How to amend several commits in Git to change author
...my repository, so how can I correct these commits before I do so (only the 3 latest commits on the master branch)?
6 Answer...
XPath: select text node
...re NovatchevDimitre Novatchev
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Android Studio says “cannot resolve symbol” but project compiles
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No idea if this will work or not but my only thought so far: right click the jar file in file t...
How can I change the color of my prompt in zsh (different from normal text)?
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Here's an example of how to set a red prompt:
PS1=$'\e[0;31m$ \e[0m'
The magic is the \e[0;31m (turn on red foreground) and \e[0m (turn off character attributes). These are called escape sequences. Different escape sequences give you different results, from absolute cursor positi...