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How do I sort an array of hashes by a value in the hash?
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Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! for in-place sorting, but there's no in-place variant for sort_by in Ruby 1.8. In practice, you can do:
sorted = sort_me.sort_by { |k| k["v...
swift case falling through
...default:
result = 3
}
Alternatively, you can use the fallthrough keyword:
var testVal = "hello"
var result = 0
switch testVal {
case "one":
fallthrough
case "two":
result = 1
default:
result = 3
}
share
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Is Java “pass-by-reference” or “pass-by-value”?
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Java is always pass-by-value.
Unfortunately, we never handle an object at all, instead juggling object-handles called references (which are passed by value of course). The chosen terminology and semantics easily confuse many beginners.
It goes like this:
pu...
Can I get git to tell me all the files one user has modified?
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This isn't the only way, but it works:
git log --pretty="%H" --author="authorname" |
while read commit_hash
do
git show --oneline --name-only $commit_hash | tail -n+2
done | sort | uniq
Or, as one line:
git log --pretty="%H" --author=...
C++ Returning reference to local variable
Is the following code (func1()) correct if it has to return i? I remember reading somewhere that there is a problem when returning reference to a local variable. How is it different from func2()?
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How to do the equivalent of pass by reference for primitives in Java
...at it reads, toyNumber = temp.play(toyNumber);.
Choice 3: make it a class or static variable
If the two functions are methods on the same class or class instance, you could convert toyNumber into a class member variable.
Choice 4: Create a single element array of type int and pass that
This is c...
First-time database design: am I overengineering? [closed]
I'm a first year CS student and I work part time for my dad's small business. I don't have any experience in real world application development. I have written scripts in Python, some coursework in C, but nothing like this.
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Hidden Features of Java
...surprise a few months ago when I first discovered it, never heard of it before.
ThreadLocals are typically not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent...
How to disable editing of elements in combobox for c#?
I have some elements in a ComboBox (WinForms with C#). I want their content to be static so that a user cannot change the values inside when the application is ran. I also do not want the user adding new values to the ComboBox
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How do I get jQuery autocompletion in TypeScript?
If I'm working in a TypeScript .ts file, what can I do to get jQuery Intellisense/autocompletion when I type the $ character?
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