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Python list iterator behavior and next(iterator)
...in a:
... print(i)
... _ = next(a)
...
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or print extra information to differentiate the print() output from the interactive interpreter echo:
>>> a = iter(list(range(10)))
>>> for i in a:
... print('Printing: {}'.format(i))
... next(a)
...
Printing: 0
1
Pr...
How to link to apps on the app store
...dleIdentifier"];
NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@", appID]];
NSData* data = [NSData dataWithContentsOfURL:url];
NSDictionary* lookup = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSString ...
Create RegExps on the fly using string variables
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And omit the / regex delimiters when using this form too.
– cdhowie
Dec 6 '10 at 22:28
add a comment
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Rails: Using build with a has_one association in rails
...en write accepts_nested_attributes_for :profile this in User model. and in form which user is being created write <%= f.simple_fields_for :profile do |p| %> this and go on.
– zeal
May 16 '15 at 6:22
...
Blocks and yields in Ruby
...zling at first.
In Ruby, methods may receive a code block in order to perform arbitrary segments of code.
When a method expects a block, it invokes it by calling the yield function.
This is very handy, for instance, to iterate over a list or to provide a custom algorithm.
Take the following ...
Diff output from two programs without temporary files
...
For anyone curious, this is how you perform process substitution in using the Fish shell:
Bash:
diff <(./a) <(./b)
Fish:
diff (./a | psub) (./b | psub)
Unfortunately the implementation in fish is currently deficient; fish will either hang or use a tem...
JavaScript regex multiline flag doesn't work
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For performance issues, it is highly recommended to use the *? quantifier instead of * in order to avoid greediness. This will avoid catching the last <h1> of the document: that's probably not what you want and that's not effi...
What is the difference between '>' and a space in CSS selectors?
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The demo is nice but really just ancillary to the information which answers the question; information that's already in the other three answers. Maybe if this question were asked today, that'd be useful, but if you're going to necro an >8-year-old question, it should really...
.bashrc/.profile is not loaded on new tmux session (or window) — why?
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Former answers provided solutions but didn't explain the reason. Here it is.
This is related to the Bash init files. By default, ~/.bashrc is used in an interactive, non-login shell. It won't be sourced in a login shell. Tmu...
Convert Go map to json
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