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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...
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...
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...
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...
One last thing to note, you may use the sys.intern function to ensure that you're getting a reference to the same string:
>>> from sys import intern
>>> a = intern('a')
>>> a2 = intern('a')
>>> a is a2
True
As pointed out abov...
How to use GROUP BY to concatenate strings in SQL Server?
...
I ran into a couple of problems when I tried converting Kevin Fairchild's suggestion to work with strings containing spaces and special XML characters (&, <, >) which were encoded.
The final version of my code (which doesn't answer the original question but m...
Swift - How to convert String to Double
...g to write a BMI program in swift language.
And I got this problem: how to convert a String to a Double?
29 Answers
...
Compare version numbers without using split function
...unt,m2.Count);
for(int i=0; i<min;i++)
{
if(Convert.ToInt32(m1[i].Value)>Convert.ToInt32(m2[i].Value))
{
return 1;
}
if(Convert.ToInt32(m1[i].Value)<Convert.ToInt32(m2[i].Value))
{
re...
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...
Showing the stack trace from a running Python application
...'s dump). Here is an implementation based on this blog:
import threading, sys, traceback
def dumpstacks(signal, frame):
id2name = dict([(th.ident, th.name) for th in threading.enumerate()])
code = []
for threadId, stack in sys._current_frames().items():
code.append("\n# Thread:...
recursion versus iteration
...ed incorrectly that's slower. On top of that, modern compilers are good at converting some recursions to loops without even asking.
And if it is always possible to convert an recursion into a for loop is there a rule of thumb way to do it?
Write iterative programs for algorithms best understoo...