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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]
I need to know if a variable in Python is a string or a dict. Is there anything wrong with the following code?
10 Answers
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What is the Ruby (spaceship) operator?
...eturn any positive number, negative number, or 0 depending on how the list items should be sorted. Spaceship operator is convenient to use in the block.
– TonyArra
Dec 3 '13 at 1:32
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How to SSH to a VirtualBox guest externally through a host? [closed]
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The best way to login to a guest Linux VirtualBox VM is port forwarding. By default, you should have one interface already which is using NAT. Then go to the Network settings and click the Port Forwarding button. Add a new Rule....
How do I open the SearchView programmatically?
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Try to call expandActionView() on MenuItem, not onActionViewExpanded() on ActionView.
It works for me.
MenuItem searchMenuItem = menu.findItem(R.id.menu_search);
searchView = (SearchView) searchMenuItem.getActionView();
searchMenuItem.expandActionView();
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How to supply value to an annotation from a Constant java
...refer to constant variables.
Actually in java there is no way to protect items in an array. At runtime someone can always do FieldValues.FIELD1[0]="value3", therefore the array cannot be really constant if we look deeper.
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Generating all permutations of a given string
...ion is based on (heaps' algorithm )
Couple of things:
Notice the last item which is depicted in the excel is just for helping you better visualize the logic. So, the actual values in the last column would be 2,1,0 (if we were to run the code because we are dealing with arrays and arrays start w...
What are the differences between Perl, Python, AWK and sed? [closed]
...as many down-votes as up (+45/-22) six years after answering).
Sed is the best tool for extremely simple command-line pipelines. In the hands of a sed master, it's suitable for one-offs of arbitrary complexity, but it should not be used in production code except in very simple substitution pipelin...
Best way to create unique token in Rails?
Here's what I'm using. The token doesn't necessarily have to be heard to guess, it's more like a short url identifier than anything else, and I want to keep it short. I've followed some examples I've found online and in the event of a collision, I think the code below will recreate the token, but ...
Invoke a callback at the end of a transition
...rom the end of the transition is that it runs your function N times (for N items in the set of transitioning elements). This is far from ideal sometimes.
– Steven Lu
Oct 3 '13 at 5:44
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Incrementing in C++ - When to use x++ or ++x?
...e logic would dictate that postfix is appropriate.
"More Effective C++" item #6 - that's sufficient authority for me.
For those who don't own the book, here are the pertinent quotes. From page 32:
From your days as a C programmer, you may recall that the prefix form of the increment operato...