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D Programming Language in the real world? [closed]
...n, a monitor object for each class, runtime type info, etc.
Unlike Ruby, Python, PHP, etc, D tries to be almost as fast as C, even if it is less dynamic and slightly more difficult to program in than scripting languages.
The result is a language that is optimal when both development time and execu...
How to convert a negative number to positive?
How can I convert a negative number to positive in Python? (And keep a positive one.)
6 Answers
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Append value to empty vector in R?
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FWIW: analogous to python's append():
b <- 1
b <- c(b, 2)
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What is an anti-pattern?
... <do something>; except: pass may be the Cardinal Sin antipattern in Python. See this: realpython.com/blog/python/…
– eric
Dec 14 '17 at 15:48
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Normalize data in pandas
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Slightly modified from: Python Pandas Dataframe: Normalize data between 0.01 and 0.99? but from some of the comments thought it was relevant (sorry if considered a repost though...)
I wanted customized normalization in that regular percentile of da...
Difference between Pig and Hive? Why have both? [closed]
... by analysts comfortable with SQL as well as by data miners programming in Python. SQL compatibility efforts in Pig have been abandoned AFAIK - so the difference between the two projects is very clear.
Supporting SQL syntax also means that it's possible to integrate with existing BI tools like Micr...
Is there a way to make mv create the directory to be moved to if it doesn't exist?
...irectories just like this: (supposed I want to create a subdirectory named python):
mkdir -p my_PDF/python && mv *.pdf $_
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How to check for an undefined or null variable in JavaScript?
...se
> Boolean(undefined) //false
all return false, which is similar to Python's check of empty variables.
So if you want to write conditional logic around a variable, just say
if (Boolean(myvar)){
// Do something
}
here "null" or "empty string" or "undefined" will be handled efficiently.
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MySQL “incorrect string value” error when save unicode string in Django
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If you have this problem here's a python script to change all the columns of your mysql database automatically.
#! /usr/bin/env python
import MySQLdb
host = "localhost"
passwd = "passwd"
user = "youruser"
dbname = "yourdbname"
db = MySQLdb.connect(host=hos...
Picking a random element from a set
... Awesome! This is not crossreferenced anywhere in the java doc! Like Python's random.shuffle()
– smci
Feb 8 '12 at 19:48
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