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How to check if a string is a valid date
...ike this, for handling bad formatted date : Date.valid_date? *Array.new(3).zip(date_string.split('-')).transpose.last.reverse.map(&:to_i)
– vincentp
Jun 1 '15 at 8:25
add ...
How do I extract a sub-hash from a hash?
...
def subhash(*keys)
keys = keys.select { |k| key?(k) }
Hash[keys.zip(values_at(*keys))]
end
end
Hash.send(:include, HashExtensions)
{:a => :A, :b => :B, :c => :C, :d => :D}.subhash(:a) # => {:a => :A}
...
Parse RSS with jQuery
...
Anirudha, perhaps you can try 7-zip? It's Free, open source, and opens a variety of file types, including tar/gzip.
– Nathan Strutz
Nov 9 '09 at 15:30
...
Pretty printing XML in Python
..., using re.compile prior to sub operation (I was using re.findall() twice, zip and a for loop with str.replace()...)
– heltonbiker
Sep 16 '11 at 20:49
3
...
How to group dataframe rows into list in pandas groupby?
...','B','B','C']
N = [1,2,5,5,4,6]
import pandas as pd
df = pd.DataFrame(zip(L,N),columns = list('LN'))
groups = df.groupby(df.L)
groups.groups
{'A': [0, 1], 'B': [2, 3, 4], 'C': [5]}
which gives and index-wise description of the groups.
To get elements of single groups, you can do, ...
How to force keyboard with numbers in mobile website in Android
...ave these hacks. I mean, it's not like a zero-leading number is that rare (Zip Codes in the US are an obvious example).
– Jaxidian
Sep 12 '17 at 14:31
2
...
Playing .mp3 and .wav in Java?
...tp://www.javazoom.net/jlgui/api.html
After downloading and extracting the zip-file one should add the following jar-files to the build path of the project:
basicplayer3.0.jar
all the jars from the lib directory (inside BasicPlayer3.0)
Here is a minimalistic usage example:
String songName = "Hu...
numpy: most efficient frequency counts for unique values in an array
...1,1,2,2,2,5,25,1,1])
y = np.bincount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, 1]])
or however you want to combine the counts and the unique values....
Execute another jar in a Java program
...der. Plugins are a pair of jars - interface and implementation - that are zipped up together. The ClassLoaders all share all the interfaces, while each ClassLoader only has knowledge of its own implementation. The stack's a little complex, but it passes all tests and works beautifully.
use Runtim...
What is InputStream & Output Stream? Why and when do we use them?
... reading complex things (for example there are Streams for reading/writing ZIP format).
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