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Using comparison operators in Scala's pattern matching system
...and a boolean expression after the pattern:
a match {
case 10 => println("ten")
case x if x > 10 => println("greater than ten")
case _ => println("less than ten")
}
Edit: Note that this is more than superficially different to putting an if after the =>, because a patter...
What is cardinality in MySQL?
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Some columns are called high-cardinality columns because they have constraints in place (like unique) prohibiting you from putting the same value in every row.
Cardinality is a property which affects the ability to cluster, sort and search data. It is therefore an important measurement for the qu...
How to convert array to SimpleXML
How can I convert an array to a SimpleXML object in PHP?
33 Answers
33
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Convert JSON to Map
What is the best way to convert a JSON code as this:
17 Answers
17
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Using print statements only to debug
...le log methods, debug, info, warning, error and critical.
import logging, sys
logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)
logging.debug('A debug message!')
logging.info('We processed %d records', len(processed_records))
...
Show the progress of a Python multiprocessing pool imap_unordered call?
...vate attributes of the result set:
from __future__ import division
import sys
for i, _ in enumerate(p.imap_unordered(do_work, xrange(num_tasks)), 1):
sys.stderr.write('\rdone {0:%}'.format(i/num_tasks))
share
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Generate random int value from 3 to 6
... maximum value, it can be generated.
SELECT @MIN+FLOOR((@MAX-@MIN+1)*RAND(CONVERT(VARBINARY,NEWID()))); --And then this T-SQL snippet generates an integer between minimum and maximum integer values.
You can change and edit this code for your needs.
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Strings in a DataFrame, but dtype is object
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Why do i need to convert every column i pass into scipy or sklearn astype(str) for it to accept it? seems I should be able to apply that to all columns initially.
– Tinkinc
Aug 21 '19 at 12:53
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Write bytes to file
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The simplest way would be to convert your hexadecimal string to a byte array and use the File.WriteAllBytes method.
Using the StringToByteArray() method from this question, you'd do something like this:
string hexString = "0CFE9E69271557822FE715A8B3E56...
How to convert a string or integer to binary in Ruby?
...ger#to_s(base) and String#to_i(base) available to you.
Integer#to_s(base) converts a decimal number to a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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