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Generator Expressions vs. List Comprehension
...on't support indexing or slicing
print [5,6] + gen() # generators can't be added to lists
Basically, use a generator expression if all you're doing is iterating once. If you want to store and use the generated results, then you're probably better off with a list comprehension.
Since performance ...
Standard concise way to copy a file in Java?
...way to copy a file in Java involves opening streams, declaring a buffer, reading in one file, looping through it, and writing it out to the other steam. The web is littered with similar, yet still slightly different implementations of this type of solution.
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What's the difference between an id and a class?
...ngs that are all alike. For instance, common id elements are things like header, footer, sidebar. Common class elements are things like highlight or external-link.
It's a good idea to read up on the cascade and understand the precedence assigned to various selectors: http://www.w3.org/TR/CSS2/casca...
What's “tools:context” in Android layout files?
Starting with a recent new version of ADT, I've noticed this new attribute on the layout XML files, for example:
9 Answers
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How to trim leading and trailing white spaces of a string?
Which is the effective way to trim the leading and trailing white spaces of string variable in Go?
7 Answers
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Rails: create on has_one association
... did not work:
You probably thought that this might work because if User had a has_many relation to Shop, @user.shops.create(params[:shop]) would work. However there is a big difference between has_many relations and has_one relations:
With a has_many relation, shops returns an ActiveRecord collec...
Delete last commit in bitbucket
I made a mistake and I don't know how to delete my latest push in the repository. I pull the latest updates of the app but it has conflicts and I push it to repository.
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How to show git log history for a sub directory of a git repo?
...f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitignore
803fcc3 Initial Commit
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How do I see all foreign keys to a table or column?
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Fabian Schmengler
21.8k88 gold badges6666 silver badges103103 bronze badges
answered Oct 14 '08 at 15:35
Vinko VrsalovicVinko Vrsalov...
Allow user to set up an SSH tunnel, but nothing else
...ails with this configuration.
I think the restricted shell suggestion, made in some previous answers, is also a good idea.
Also, I would agree that everything detailed here could be determined from reading "man sshd" and searching therein for "authorized_keys"
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