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Lambda function in list comprehensions
... calls it ten times.
The second one doesn't call the function. It creates 10 different lambda functions. It puts all of those in a list. To make it equivalent to the first you need:
[(lambda x: x*x)(x) for x in range(10)]
Or better yet:
[x*x for x in range(10)]
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git switch branch without discarding local changes
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answered Feb 27 '14 at 23:08
torektorek
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List of remotes for a Git repository?
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edited Jul 18 '18 at 6:10
Peter Mortensen
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Bootstrap dropdown sub menu missing
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Updated 2018
The dropdown-submenu has been removed in Bootstrap 3 RC. In the words of Bootstrap author Mark Otto..
"Submenus just don't have much of a place on the web right now, especially the mobile web. They will be removed wi...
How does Stack Overflow generate its SEO-friendly URLs?
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302
Here's how we do it. Note that there are probably more edge conditions than you realize at firs...
How do you get the file size in C#?
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edited Nov 4 '14 at 20:36
Luca Cremonesi
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answer...
What is the difference between the kernel space and the user space?
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120
The really simplified answer is that the kernel runs in kernel space, and normal programs run in...
Creating my own Iterators
...rs. I have written an article about this very topic; it's in the December 2008 ACCU magazine. It discusses an (IMO) elegant solution for exactly your problem: exposing member collections from an object, using Boost.Iterators.
If you want to use the stl only, the Josuttis book has a chapter on imple...
How to completely remove node.js from Windows
I uninstalled my previous version of node.js (0.8.11) and downloaded the latest, 0.10.24 from the node.js website and installed it. However, after running node --version , it still indicates that I'm running v0.8.11. Obviously, some stuff was left behind during the uninstall process, and it's causi...
Check whether a variable is a string in Ruby
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I think you are looking for instance_of?. is_a? and kind_of? will return true for instances from...