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Require returns an empty object
...js got from require('./book') will be the full book.js module object
For more info, here's the docs: http://nodejs.org/api/modules.html
If its possible to dynamically add that schema to one of those ActiveRecord objects, that's one way to solve this. This is actually kind of a tricky situation. I...
How to test if parameters exist in rails
...There but false.
There but an empty string.
as well. Hard to say without more details of your precise situation.
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Is there a good reason to use upper case for SQL keywords? [closed]
...o mentally parse the syntax.
The direct answer to your question, then, is more an answer to “why does the reader of SQL code benefit so much from uppercase keywords, when that's not as true for most modern languages?”:
To rely on keeping the keywords in one's head is reasonable for many moder...
Why shouldn't I use mysql_* functions in PHP?
...ql_* functions used to be very popular, but their use is not encouraged anymore. The documentation team is discussing the database security situation, and educating users to move away from the commonly used ext/mysql extension is part of this (check php.internals: deprecating ext/mysql).
And the la...
What are paramorphisms?
...ficient, but if you're interested in sheer expressivity, para gives you no more than foldr. If you use this foldr-encoded version of para, then safeTail will take linear time after all, copying the tail element by element.
So, that's it: para is a more convenient version of foldr which gives you im...
How to get string width on Android?
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Great answer. By the way, the result will be more accurate if call textView.setTextSize().
– li2
Aug 6 '15 at 14:57
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What is InputStream & Output Stream? Why and when do we use them?
... @KorayTugay A stream is generally defined as a set of characters. To be more precise, more than one bit or character is called as a stream.
– Gowtham Gopalakrishnan
Jul 28 '14 at 15:21
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Flatten an irregular list of lists
...he Iterable ABC added in 2.6.
Python 3
In Python 3, the basestring is no more, but you can use a tuple of str and bytes to get the same effect there.
The yield from operator returns an item from a generator one at a time. This syntax for delegating to a subgenerator was added in 3.3
def flatten(...
How to shuffle a std::vector?
...std::shuffle if you intend to generate different permutations every time!
Moreover, if you want your program to create different sequences of shuffles each time it is run, you can seed the constructor of the random engine with the output of std::random_device:
auto rd = std::random_device {};
aut...
class method generates “TypeError: … got multiple values for keyword argument …”
...'foo'. This section of the docs explains how function arguments work a bit more.
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