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What is duck typing?
...ke a duck then it is a duck.”) - YES! but what does that mean??! This is best illustrated by example:
Examples of Duck Typing functionality:
Imagine I have a magic wand. It has special powers. If I wave the wand and say "Drive!" to a car, well then, it drives!
Does it work on other things? Not ...
Downloading Java JDK on Linux via wget is shown license page instead
...pause it (within the Downloads windows), use the "Copy Download Link" menu item of the context menu displayed for the downloading file. This URL can then be used on the Linux box to download the same file. I expect the URL has a short time to live. Ugly, but generally successful.
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Why not use exceptions as regular flow of control?
...example, iterators raise a StopIteration exception if there are no further items. Even standard language constructs (such as for) rely on this.
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How to calculate age (in years) based on Date of Birth and getDate()
... 17
(1 row(s) affected)
UPDATE here are some more accurate methods:
BEST METHOD FOR YEARS IN INT
DECLARE @Now datetime, @Dob datetime
SELECT @Now='1990-05-05', @Dob='1980-05-05' --results in 10
--SELECT @Now='1990-05-04', @Dob='1980-05-05' --results in 9
--SELECT @Now='1989-05-06', @Do...
Hibernate, @SequenceGenerator and allocationSize
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Thanks Steve! The best answer. Also your other post was helpful.
– G. Demecki
Oct 8 '12 at 8:53
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Getting output of system() calls in Ruby
...tead of the output, and capturing the latter is convoluted and messy.
The best answer in this thread so far mentions Open3, but not the functions that are best suited for the task. Open3.capture2, capture2e and capture3 work like system, but returns two or three arguments:
out, err, st = Open3.cap...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
... = @123.45;
number = @YES;
[Edit]
zxoq at http://news.ycombinator.com/item?id=3672744 has added more interesting new subscripting. (Added with literals):
arr[1] === [arr objectAtIndex:1]
dict[@"key"] === [dict objectForKey:@"key"]
[Edit 2]
The new ObjC literals were discussed in mult...
Is there a library function for Root mean square error (RMSE) in python?
...s / infinities in either list: Ignore that component, zero it out or add a best guess or a uniform random noise to all timesteps. Each remedy has its pros and cons depending on what your data means. In general ignoring any component with a missing value is preferred, but this biases the RMSE towar...
Big-oh vs big-theta [duplicate]
...atrix multiplication' being O(N^3). Perhaps you should throw in the words 'best known algorithm' in there.
– Aryabhatta
Jul 12 '10 at 16:38
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Quickly find whether a value is present in a C array?
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+1 for binary search. Algorithmic re-design is the best way to optimise.
– Rocketmagnet
Sep 6 '14 at 22:16
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