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In Python, using argparse, allow only positive integers
... case, you can also use the choices parameter if your upper limit is also known:
parser.add_argument('foo', type=int, choices=xrange(5, 10))
Note: Use range instead of xrange for python 3.x
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Best explanation for languages without null
... be in one of three states: open, shut but unlocked, and shut and locked. Now I could model it along the lines of
class Door
private bool isShut
private bool isLocked
and it is clear how to map my three states into these two boolean variables. But this leaves a fourth, undesired state a...
How to create an array containing 1…N
...for creating a JavaScript array containing 1 through to N where N is only known at runtime.
61 Answers
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Current time in microseconds in java
...ave System.nanoTime(), but that just gives an offset from some previously known time. So whilst you can't take the absolute number from this, you can use it to measure nanosecond (or higher) precision.
Note that the JavaDoc says that whilst this provides nanosecond precision, that doesn't mean nano...
Why is  appearing in my HTML? [duplicate]
... i open it with notepad no unusual character was there and i save it now i have three character at the top . hooray ! :)
– mehdi
Mar 13 '12 at 20:56
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How do I use extern to share variables between source files?
I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope?
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Print multiple arguments in Python
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FYI, as of Python 3.6, we get f-strings, so you can now also do print(f"Total score for {name} is {score}") with no explicit function calls (as long as name and score are in scope obviously).
– ShadowRanger
Dec 7 '16 at 1:41
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iOS: how to perform a HTTP POST request?
...pple.com/library/mac/#documentation/Cocoa/Conceptual/… although if you know enough to mess around with different threads, you'll probably be fine.
– Aaron Brown
May 3 '12 at 21:53
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Update MongoDB field using value of another field
...requests);
}
MongoDB 2.6 and 3.0
From this version you need to use the now deprecated Bulk API and its associated methods.
var bulk = db.collection.initializeUnorderedBulkOp();
var count = 0;
cursor.snapshot().forEach(function(document) {
bulk.find({ '_id': document._id }).updateOne( {
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What's the standard way to work with dates and times in Scala? Should I use Java types or there are
... longer maintained.
import com.github.nscala_time.time.Imports._
DateTime.now // returns org.joda.time.DateTime = 2009-04-27T13:25:42.659-07:00
DateTime.now.hour(2).minute(45).second(10) // returns org.joda.time.DateTime = 2009-04-27T02:45:10.313-07:00
DateTime.now + 2.months // returns org.joda....