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Determining type of an object in ruby
...he object, it returns its class. The name should be a dead giveaway. Class and Type are two completely different concepts in OO.
– Jörg W Mittag
Apr 2 '13 at 22:57
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Execute and get the output of a shell command in node.js
...ode.js, I'd like to find a way to obtain the output of a Unix terminal command. Is there any way to do this?
5 Answers
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What is the point of Lookup?
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It's a cross between an IGrouping and a dictionary. It lets you group items together by a key, but then access them via that key in an efficient manner (rather than just iterating over them all, which is what GroupBy lets you do).
For example, you could take...
Difference between fold and reduce?
...ing to learn F# but got confused when trying to distinguish between fold and reduce . Fold seems to do the same thing but takes an extra parameter. Is there a legitimate reason for these two functions to exist or they are there to accommodate people with different backgrounds? (E.g.: String and...
Find a value anywhere in a database
Given a #, how do I discover in what table and column it could be found within?
18 Answers
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Clicking the text to select corresponding radio button
...ation using PHP. Each question is comprised of a separate <label> and has 4 possible choices, using radio buttons to allow the user to select his/her answer. The current HTML for a single question looks like:
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Which is more efficient, a for-each loop, or an iterator?
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If you are just wandering over the collection to read all of the values, then there is no difference between using an iterator or the new for loop syntax, as the new syntax just uses the iterator underwater.
If however, you mean by loop the ...
PowerShell: Store Entire Text File Contents in Variable
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@Nick In .Net (and windows), any line with \r\n will be counted.
– manojlds
Nov 2 '11 at 7:35
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How to iterate over arguments in a Bash script
I have a complex command that I'd like to make a shell/bash script of. I can write it in terms of $1 easily:
8 Answers
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Adding up BigDecimals using Streams
...ded a totalMapper variable, that has a function from Invoice to BigDecimal and returns the total price of that invoice.
Then I obtain a Stream<Invoice>, map it to a Stream<BigDecimal> and then reduce it to a BigDecimal.
Now, from an OOP design point I would advice you to also actually ...