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What is Type-safe?
... call it like this:
Sum = AddTwoNumbers(5, "5");
Javascript automaticly converts the 5 to a string, and returns "55". This is due to javascript using the + sign for string concatenation. To make it type-aware, you would need to do something like:
function AddTwoNumbers(a, b)
{
return Number(...
How do I reverse an int array in Java?
...t[]>, containing one element. There is AFAICS no simple built-in way to convert an int[] to an Integer[].
– Martin Rust
Sep 22 '16 at 7:14
4
...
Why does Python use 'magic methods'?
...those operations that
were generic for a group of types and
which were intended to work even for
objects that didn’t have methods at
all (e.g. tuples). It is also
convenient to have a function that can
readily be applied to an amorphous
collection of objects when you use the
functi...
What is a wrapper class?
...per.stringValue();
so this is the way , we can use wrapper class type to convert into other primitive types as well. This type of conversion is used when you need to convert a primitive type to object and use them to get other primitives as well.Though for this approach , you need to write a big c...
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))
...
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?
...
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...
Calendar returns wrong month [duplicate]
...treal" ) );
int month = now.getMonthValue(); // Returns 1-12 as values.
Convert legacy classes
If you have a GregorianCalendar object in hand, convert to ZonedDateTime using new toZonedDateTime method added to the old class. For more conversion info, see Convert java.util.Date to what “java.ti...
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
...
Is there a built in function for string natural sort?
...
Try this:
import re
def natural_sort(l):
convert = lambda text: int(text) if text.isdigit() else text.lower()
alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ]
return sorted(l, key = alphanum_key)
Output:
['elm0', 'elm1', 'Elm...