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Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?
...king at CoffeeScript if you want an alternative syntax. It has some shorthand that is similar to what you are looking for.
For example The Existential Operator
zip = lottery.drawWinner?().address?.zipcode
Function shortcuts
()-> // equivalent to function(){}
Sexy function calling
func '...
How do you test that a Python function throws an exception?
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I'm using Python 2.7.10, and the above doesn't work; context.exception does not give the message; it is a type.
– LateCoder
Feb 25 '16 at 16:55
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How do I handle newlines in JSON?
I've generated some JSON and I'm trying to pull it into an object in JavaScript. I keep getting errors. Here's what I have:
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Select element by exact match of its content
... "bold");
It's not a selector, but it does the job. :-)
If you want to handle whitespace before or after the "hello", you might throw a $.trim in there:
return $.trim($(this).text()) === "hello";
For the premature optimizers out there, if you don't care that it doesn't match <p><span&...
What is the usefulness of `enable_shared_from_this`?
...ran across enable_shared_from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
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What's the best method in ASP.NET to obtain the current domain?
...cation.
This checks for the default port instead.
Edit: Updated syntax and using Request.Url.Authority as suggested
$"{Request.Url.Scheme}{System.Uri.SchemeDelimiter}{Request.Url.Authority}"
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Traverse a list in reverse order in Python
So I can start from len(collection) and end in collection[0] .
26 Answers
26
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How to achieve code folding effects in Emacs?
...ntioned somewhere? Type C-sfoo, find the definition, press enter, read it, and then press C-x C-x to go back to where you were. Simple and very useful.
Most modes support imenu. M-ximenu will let you jump to a function definition (etc.) by name. You can also bind it to a mouse click to get a men...
Is there any difference between a GUID and a UUID?
I see these 2 acronyms thrown around, and I was wondering if there are any differences between a GUID and a UUID?
6 Answers...
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...QuerySet in the following ways:
Iteration. A QuerySet is iterable, and it executes its database query the first time you iterate over it. For example, this will print the headline of all entries in the database:
for e in Entry.objects.all():
print e.headline
So your ten million ro...