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Pythonic way to combine FOR loop and IF statement
...>>> xyz = [0, 12, 4, 6, 242, 7, 9]
>>>
>>> known_things = sorted(set(a.iterkeys()).intersection(xyz))
>>> unknown_things = sorted(set(xyz).difference(a.iterkeys()))
>>>
>>> for thing in known_things:
... print 'I know about', a[thing]
...
I k...
How to Correctly Use Lists in R?
...
Regarding your questions, let me address them in order and give some examples:
1) A list is returned if and when the return statement adds one. Consider
R> retList <- function() return(list(1,2,3,4)); class(retList())
[1] "list"
R> notList <- function() re...
Are Mutexes needed in javascript?
... to a DB to get some values. Quickly typing data can easily lead to out-of-order results.
– thomasb
Nov 17 '17 at 16:15
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Are there any reasons to use private properties in C#?
... them if I need to cache a value and want to lazy load it.
private string _password;
private string Password
{
get
{
if (_password == null)
{
_password = CallExpensiveOperation();
}
return _password;
}
}
...
What's wrong with Java Date & Time API? [closed]
...of the year 109). There are a similar number of ++ and -- on the months in order to convert to a string.
They're mutable. As a result, any time you want to give a date back (say, as an instance structure) you need to return a clone of that date instead of the date object itself (since otherwise, peo...
fork() branches more than expected?
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when i=0
Process_1: Buffered text= 1 dot
Process_2(created by Process_1): Buffered text= 1 dot
when i=1
Process_3(created by Process_1): Inherit 1 buffered dot from Process_1 and prints 1 dot by itself. In total Process_3 prints 2 dots.
...
How to disable and re-enable console logging in Python?
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You can use:
logging.basicConfig(level=your_level)
where your_level is one of those:
'debug': logging.DEBUG,
'info': logging.INFO,
'warning': logging.WARNING,
'error': logging.ERROR,
'critical': logging.CRITICAL
So, if you set your_l...
How to generate JAXB classes from XSD?
....xml.bind.*;
import javax.xml.transform.stream.StreamSource;
import org.w3._2005.atom.FeedType;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance("org.w3._2005.atom");
Unmarshaller unmarshaller = jc.createUnm...
Why are all fields in an interface implicitly static and final?
...a is defined by a static final field (and by convention the name uses UPPER_CASE_AND_UNDERSCORES).
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Why should I use IHttpActionResult instead of HttpResponseMessage?
... Under the covers, this is how ActionFilters are implemented however, the ordering of those ActionFilters is not obvious when reading the action method which is one reason I'm not a fan of action filters.
However, by creating an IHttpActionResult that can be explicitly chained in your action metho...