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Linux bash: Multiple variable assignment
Does exist in linux bash something similar to the following code in PHP:
5 Answers
5
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ggplot with 2 y axes on each side and different scales
...such as now, for me) a client wants two sets of data on the same plot, and does not want to hear me talk about Plotting Theory. I either have to convince them to not want that anymore (not always a battle I want to wage), or tell them "the plotting package I'm using doesn't support that." So I'm s...
Where to define custom error types in Ruby and/or Rails?
...lidations will fail:
def MyModel < ActiveRecord::Base
validate :code_does_not_contain_hyphens
def code_does_not_contain_hyphens
errors.add(:code, "cannot contain hyphens") if code.include?("-")
end
end
When validations are run, this method will piggy-back onto ActiveRecord's ActiveR...
mkdir's “-p” option
So this doesn't seem like a terribly complicated question I have, but it's one I can't find the answer to. I'm confused about what the -p option does in Unix. I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one. It looked like this:
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Java Persistence / JPA: @Column vs @Basic
...ions in JPA? Can they be used together? Should they be used together? Or does one of them suffice?
4 Answers
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What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?
...out the class file format and not the Java Source code. - Indeed the order does not matter but if you follow a recommendation your code will be more readable to others. So I think this is a reasonable question where a precise answer can be given. By the way - static code analyzer (e.g. SONAR) will c...
What is the Scala annotation to ensure a tail recursive function is optimized?
...a tail recursive function. Do you just put it in front of the declaration? Does it also work if Scala is used in scripting mode (for instance using :load <file> under REPL)?
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How to enumerate an enum with String type?
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In Java the compiler does this for you, maybe Swift 2.0 will do this also. In particular in Java all enums get a description (toString in Java) method that gives the String as the case names (Washers, ...) and a Set of the cases is automatically ...
How to set standard encoding in Visual Studio
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When you set Unicode does it actually use UTF-8 or UTF-16?
– binki
Nov 8 '16 at 20:45
9
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Finding the number of days between two dates
... Forget leap seconds (no, actually consider those too) but this does NOT account for Daylight Saving Time changes! It can be off by an entire day over those boundaries every year. You need to use the DateTime classes.
– Levi
Dec 4 '12 at 3:34
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