The `*` operator as used in Ruby. So called because it looks like an insect that's splatted on a windscreen.
The * operator as used in Ruby. So called because it looks like an insect that's splatted on a windscreen.
Questions tagged [splat]
166 questions
0
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1 answer
zip_longest on Array with lists of the same length. Understanding
I have an Array which contains a few lists all the same length. All those lists need to be written in a .csv-file. Using a piece of code i have found it works pretty well. Here the code:
ag=[[1,2,3],[4,5,6],[7,8,9],[10,11,12]]
export_data =…
McMo
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0
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1 answer
Python string interpolation with splat operator?
I have a large (~10 elements) list of integers that I wish to interpolate into a string. This seems like an ideal use case for the splat operator, so I'd like to be able to do something like this:
"""[latex]$\begin{bmatrix}
%d & %d \\ %d &…
pseudosudo
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2 answers
Most efficient way to texture splat opengl?
I have to combine up to 17 textures and then render it to a quad (well, 2 triangles) using openGL. I have to render a great deal of these quads - perhaps 500.
I was wondering what the fastest/best method to doing so:
A. render in many passes
B.…
Pubby
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0 answers
Python splat operator error
I have a map iterator gmm and I'm sending it to a function called fisher_vector but I receive the following error:
TypeError: fisher_vector() missing 3 required positional arguments: 'means', 'covs', and 'w'
I call the function in this line:
return…
Daniel Zapata
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0
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2 answers
Splat parameters behave differently for attribute writers compared to regular method
I have the following two methods, which I believe should have the same behaviour disregarding their names:
def a=(*params)
params
end
def b(*params)
params
end
But when in fact I use them:
a=(1) # => 1
b(1) # => [1]
(a=1) == b(1) # =>…
thisismydesign
- 21,553
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0
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1 answer
Rails 3 - Splat attr_accessible with Active Record
I'm making typedoptions dynamic by moving them to a new model, as you can see before I was using a constant to make the columns t_a, t_b, t_c accessible with *TYPED_DATA, but now that the model has been migrated, i can't do it anymore. Is there a…
raul782
- 479
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0
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2 answers
two level splatter TCL
If I have a procedure or a command in TCL, with variable number of arguments, one can use, if a list's elements are as an input, the "splatter" operator, for example:
set a [list "ko" ]
set m [ list "ok" "bang" ]
lappend a {*}$m
But, what if I want…
user1134991
- 3,003
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0
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1 answer
Ruby - extending method with super using splat
In "Comprehensive Ruby programming course" e-book I have a case when the child class method extends parents method. I am not completely aware how it works:
class Parent
def initialize(foo:, bar:)
@foo = foo
@bar = bar
end
end
class Child…
Julius Dzidzevičius
- 10,775
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3 answers
Ruby splat operator: Array(1..10).equal? [*Array(1..10)] => false?
I was looking at:
hash_1 = Hash[*[Array("a".."j"), Array(1..10)].transpose.flatten]
So I thought, the return with or without the splat, "*", looks the same - so why
hash_1 = Hash[[Array("a".."j"), Array(1..10)].transpose.flatten] returns {} …
ayuspark
- 21
- 2
0
votes
1 answer
Using a splat to catch errors is not working
I have a lot of errors that I need to catch, so I put them all into two arrays and made a constant to hold them, however, when I run the program I receive the…
YoYoYo I'm Awesome
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0
votes
1 answer
ruby splat operator compilation error in eclipse but runs fine on command line
I have the following ruby script ruby_test.rb in eclipse (DLTK/RUBY), which throws a compilation error and I am not able to run in eclipse. This makes sense since *arr should be the last parameter. But when I run it on command line (ruby…
North
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0
votes
1 answer
How use an array of strings to create multiple ActiveRecord objects at once?
I have an array of strings:
days = ["Monday", "Tuesday", "Wednesday"]
I'd like to create a Day in the database named after each of these:
days.each do |day|
Day.create(name: day)
end
This isn't so cute, however. In the past, I have been able to…
Dylan Richards
- 796
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0
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1 answer
Passing array to one of named parameters in script block?
I am trying to figure out a way to pass an array to a named parameter in a separate script. However, I could not find any solution.
Test2.ps1:
param(
[int]$a,
[int]$b,
[int]$c,
[string[]]$d
)
write-host "`$a = $a"
write-host "`$b =…
MagicGuru
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0
votes
1 answer
In Ruby: I'm giving a method an argument somehow when calling it, but don't know where. I think it has something to do with block bindings?
Apologies for not knowing how to state this question better.
I was noticing how the block syntax of {} binds to the object immediately to the left, and then noticed the do/end binds to the object that starts the line. In the process, I noticed…
Tony DiNitto
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1 answer
Method: Loop Through Arguments with Defaults
I am building a Ruby object that has defaults for arguments in its initialize method:
attr_accessor :one, :two, :three
def initialize(one: nil, two: nil, three: nil)
@one = one
@two = two
@three = three
end
As you can see, this isn't very…
RedBassett
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