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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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In Postgresql, force unique on combination of two columns
I would like to set up a table in PostgreSQL such that two columns together must be unique. There can be multiple values of either value, so long as there are not two that share both.
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Changing three.js background to transparent or other color
I've been trying to change what seems to be the default background color of my canvas from black to transparent / any other color - but no luck.
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sql “LIKE” equivalent in django query
What is the equivalent of this SQL statement in django?
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How does one make an optional closure in swift?
I'm trying to declare an argument in Swift that takes an optional closure. The function I have declared looks like this:
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LaTeX: Prevent line break in a span of text
...s in my \texttt{...} or \url{...} text regions? There's no spaces inside I can replace with ~ , it's just breaking on symbols.
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How to extract a string using JavaScript Regex?
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Private and protected constructor in Scala
...an explicit primary constructor in Scala, just the contents of the class body.
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How to get the anchor from the URL using jQuery?
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Using Rails serialize to save hash to database
I'm try to save a hash mapping ids to a number of attempts in my rails app. My migration to the database to accommodate this new column:
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