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How to terminate the script in JavaScript?
How can I exit the JavaScript script much like PHP's exit or die ? I know it's not the best programming practice but I need to.
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Specifying column name in a “references” migration
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Do it manually:
add_column :post, :author_id, :integer
but now, when you create the belongs_to statement, you will have to modify it, so now you have to call
def post
belongs_to :user, :foreign_key => 'author_id'
end
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Split a collection into `n` parts with LINQ?
Is there a nice way to split a collection into n parts with LINQ?
Not necessarily evenly of course.
19 Answers
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What are some (concrete) use-cases for metaclasses?
... Matplotlib. However, on occasion one wants to do interactive plotting. With only a couple functions I found that I was able to increment the figure count, call draw manually, etc, but I needed to do these before and after every plotting call. So to create both an interactive plotting wrapper and...
How to disallow temporaries
For a class Foo, is there a way to disallow constructing it without giving it a name?
10 Answers
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Does Java SE 8 have Pairs or Tuples?
I am playing around with lazy functional operations in Java SE 8, and I want to map an index i to a pair / tuple (i, value[i]) , then filter based on the second value[i] element, and finally output just the indices.
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Is it possible to declare two variables of different types in a for loop?
Is it possible to declare two variables of different types in the initialization body of a for loop in C++?
8 Answers
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Determine if the device is a smartphone or tablet? [duplicate]
I would like to get info about a device to see if it's a smartphone or tablet. How can I do it?
9 Answers
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Undefined, unspecified and implementation-defined behavior
...ng to programmers coming from other languages (other languages try to hide it better). Basically, it is possible to write C++ programs that do not behave in a predictable way, even though many C++ compilers will not report any errors in the program!
Let's look at a classic example:
#include <ios...
In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
...t to True, disables a form field using the disabled HTML attribute so that it won’t be editable by users. Even if a user tampers with the field’s value submitted to the server, it will be ignored in favor of the value from the form’s initial data.
With Django 1.8 and earlier, to disable entr...