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How to split a string in Java
... this takes a regular expression, so remember to escape special characters if necessary.
there are 12 characters with special meanings: the backslash \, the caret ^, the dollar sign $, the period or dot ., the vertical bar or pipe symbol |, the question mark ?, the asterisk or star *, the plus s...
What is PECS (Producer Extends Consumer Super)?
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tl;dr: "PECS" is from the collection's point of view. If you are only pulling items from a generic collection, it is a producer and you should use extends; if you are only stuffing items in, it is a consumer and you should use super. If you do both with the same collection, you ...
Difference between Dictionary and Hashtable [duplicate]
What is the difference between Dictionary and Hashtable. How to decide which one to use?
7 Answers
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Matplotlib scatterplot; colour as a function of a third variable
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There's no need to manually set the colors. Instead, specify a grayscale colormap...
import numpy as np
import matplotlib.pyplot as plt
# Generate data...
x = np.random.random(10)
y = np.random.random(10)
# Plot...
plt.scatter(x, y, c=y, s=500)
plt.gray()
plt.show()
Or, if ...
Difference between HTML “overflow : auto” and “overflow : scroll”
...came across these two values: auto and scroll , which adds scrollbar(s) if the content overflows the element.
6 Answers...
Oracle: If Table Exists
...n Oracle database, and was hoping Oracle had something similar to MySQL's IF EXISTS construct.
15 Answers
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Python: finding an element in a list [duplicate]
...f an item that has value > 100.
for index, item in enumerate(arr):
if item > 100:
return index, item
Source
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A Windows equivalent of the Unix tail command [closed]
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If you use PowerShell then this works:
Get-Content filenamehere -Wait -Tail 30
Posting Stefan's comment from below, so people don't miss it
PowerShell 3 introduces a -Tail parameter to include only the last x lines
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Zip lists in Python
...ip(a, b, c)
In [4]: len(result[0])
Out[4]: 3
Of course, this won't work if the lists were empty to start with.
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Pandas DataFrame column to list [duplicate]
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I'd like to clarify a few things:
As other answers have pointed out, the simplest thing to do is use
pandas.Series.tolist(). I'm not sure why the top voted answer
leads off with using pandas.Series.values.tolist() since as far as I can te...