arrays code snippets in ruby

[{:s, 1, :xl, 4}] is returned to me. i want to only return {:s, 1, :xl, 4}. how to? in ruby

a function to flatten a nested array, if it contains nil, removes the nils, if its elements are all nil, return empty array. in ruby

a shorter way to do: ` arr = %w[black brown red orange yellow green blue violet grey white] cols = arr.each_with_index.map {|col , ind| [col, ind.to_s]}.to_h` in ruby

add an element to the end of an array in ruby

check if array is empty in ruby

check if array is not empty in ruby

concatenate two arrays in ruby

count instances of an element inside an array in ruby

count words in array in ruby

create a csv file in ruby

find all the strings matching ‘tony’ in an array of strings, then return how many there are. if there are none then return nil in ruby

find the average of a list of numbers in ruby

find the index of an element in an array in ruby

find the kth largest element in an array in ruby

find the kth largest key in a map in ruby

find the kth longest word in a string in ruby

find the kth most common element in an array in ruby

find the kth smallest element in an array in ruby

find the last element in an array in ruby

find the length of an array in ruby

find the median of a list of numbers in ruby

find the median of all elements in an array in ruby

find the median of all keys in a map in ruby

find the mode of a list of numbers in ruby

find the range of all elements in an array in ruby

find the standard deviation of all elements in an array in ruby

for an input like: `%w[black brown white], write a function that takes the index of 1st element and index of 2nd element and combines them into a digit in ruby

get a sample of 5 elements from an array in ruby

gimme a function that take only the first two elements of an array passed to it, even though it can take a variable amount of arguments in ruby

give me a function that does this: input: [1,[2,3,null,4],[null],5] output: [1,2,3,4,5] in ruby

given a string representing a matrix of numbers, return the rows and columns of that matrix. in ruby

how do i convert this to an array of strings: `[0, [0, 1], {foo: 0}] * ', '` in ruby

how to check if a number is in an array? like `5 in [1, 3, 5]`? in ruby

how to check if an array is empty? in ruby

how to find multiples of two numbers not exceeding some n? in ruby

how to return the total value, as an integer, of all the hash values of three hashes, each of which is an element of an array? in ruby

how to sum hash values in an array of five hashes? in ruby

how to sum the values in [{ a: 5, b: 10, c: 15 }, {}, { q: 67 }] in ruby

i did not understand this when i was reading ruby docs: "::[]: returns a new array populated with given objects." in ruby

insert an element into an array at a specific index in ruby

iterate an array of strings with index in ruby

iterate over an array of strings with index using the map function in ruby

join an array of substrings into a string in ruby

remove an element from an array at a specific index in ruby

remove an element from the beginning of an array in ruby

remove an element from the end of an array in ruby

remove an element from the middle of an array in ruby

reverse an array in ruby

shuffle an array in ruby

split a string into an array of substrings in ruby

teach me array#each what it does and how? in ruby

what is wrong? `print([1, 3, 6, 9 ].find { |e| e < 9 })` in ruby

when i do `%w[0, [0, 1], {foo: 0}]` i get ["0,", "[0,", "1],", "{foo:", "0}"]. what to do in order to get ["0", "[0, "1], "{foo: 0}"] in ruby