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Python's “in” set operator
... Ok so "is there an element x in s such that hash(b) == hash(x) and x == b"?
– Dejas
Jan 2 '12 at 21:25
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How do I horizontally center a span element inside a div
I am trying to center the two links 'view website' and 'view project' inside the surrounding div. Can someone point out what I need to do to make this work?
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How can I alter a primary key constraint using SQL syntax?
...rimary key constraint name, use query found here to look it up (or look up and drop all at once). http://stackoverflow.com/a/13948609/945875
– Justin
Dec 19 '13 at 20:06
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Check if value already exists within list of dictionaries?
...sing the above code can give you a KeyError. You can fix this by using get and providing a default value. If you don't provide a default value, None is returned.
if not any(d.get('main_color', default_value) == 'red' for d in a):
# does not exist
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How should I copy Strings in Java?
...e safe. The latter, however, is less efficient (it creates an extra object and in some cases copies the character data).
With this in mind, the first version should be preferred.
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Javascript: How to check if a string is empty? [duplicate]
I know this is really basic, but I am new to javascript and can't find an answer anywhere.
5 Answers
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TypeScript: Creating an empty typed container array
... In the vast majority of cases the mentioned downsides would be negligible and readability is the most important factor.
*: Fun fact; at the time of writing the performance difference was 60% in Chrome, while in Firefox there was no measurable performance difference.
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Latex Remove Spaces Between Items in List
...numitem package provides a lot of features to customize bullets, numbering and lengths.
The paralist package provides very compact lists: compactitem, compactenum and even lists within paragraphs like inparaenum and inparaitem.
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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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Coffeescript — How to create a self-initiating anonymous function?
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@scribu Well, those two statements are very different, and yours is actually the one that I should have given. Mine assigns the function -> console.log 'this runs right away' to f, then runs it; yours runs the function and then assigns its result to f, as in the original quest...