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Why does typeof NaN return 'number'?
...ds of operation
which return NaN:
Operations with a NaN as at least one operand
Indeterminate forms
The divisions 0/0, ∞/∞, ∞/−∞, −∞/∞, and −∞/−∞
The multiplications 0×∞ and 0×−∞
The power 1^∞
The additions ∞ + (−∞), (−∞) + ...
Objective-C: difference between id and void *
...clared in any of the @interface declarations seen by the compiler.
Thus, one should never refer to an object as a void *. Similarly, one should avoid using an id typed variable to refer to an object. Use the most specific class typed reference you can. Even NSObject * is better than id becaus...
What is the HTML tabindex attribute?
...able".
In my mind the second thing is even more important than the first one. There are very few elements that are focusable by default (e.g. <a> and form controls). Developers very often add some JavaScript event handlers (like 'onclick') on not focusable elements (<div>, <span>...
Save file to specific folder with curl command
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What is the difference between the two? The first one cd's into a the directory and downloads the file, then cds out. The second stays in current directory and curls file to specificed location. Second one seems more simple.
– Henry Zhu
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Any way to properly pretty-print ordered dictionaries?
...g the OD it to a dict should avoid the issue of everything being placed on one line.
– martineau
Nov 29 '10 at 9:07
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What's the difference between faking, mocking, and stubbing?
... lightweight implementation of the same functionality as provided by a component that the SUT depends on and instruct the SUT to use it instead of the real.
Stub : This implementation is configured to respond to calls from the SUT with the values (or exceptions) that will exercise the Untested Code ...
How do I determine whether an array contains a particular value in Java?
...he constructor will just change a reference so that's not much work to be done there. And contains()/indexOf() will iterate and use equals(). For primitives you should be better off coding it yourself, though. For Strings or other classes, the difference will not be noticeable.
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Facebook Android Generate Key Hash
...hash. Thanks for this post, hope this post will save a lot of time of some one.
– Emran Hamza
May 23 '13 at 5:22
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How to flush output of print function?
...p and followed by end. Both sep and end must be strings; they can also be None, which means to use the default values. If no objects are given, print() will just write end.
The file argument must be an object with a write(string) method; if it is not present or None, sys.stdout will be used. Wh...
Specifying colClasses in the read.csv
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one can probably use the following to read the first line of the csv and determine how many columns there are. scan(csv,sep=',', what="character" , nlines=1 )
– defoo
May 10 '10 at 19:5...