# Creating a lambda
l = lambda { |name| "Hi #{name}!" }
# Executing the lambda
l.call("foo") # => Hi foo!
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// without callback | |
Array.prototype.eachSlice = function (size){ | |
this.arr = [] | |
for (var i = 0, l = this.length; i < l; i += size){ | |
this.arr.push(this.slice(i, i + size)) | |
} | |
return this.arr | |
}; | |
[1, 2, 3, 4, 5, 6].eachSlice(2) |
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function shuffle(tbl) | |
for i = #tbl, 2, -1 do | |
local j = math.random(i) | |
tbl[i], tbl[j] = tbl[j], tbl[i] | |
end | |
return tbl | |
end |
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/* Deleting a node from Binary search tree */ | |
#include<iostream> | |
using namespace std; | |
struct Node { | |
int data; | |
struct Node *left; | |
struct Node *right; | |
}; | |
//Function to find minimum in a tree. | |
Node* FindMin(Node* root) |
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require 'fileutils' | |
# __FILE__ keyword in ruby | |
puts "The current ruby file being executed is #{__FILE__}" | |
# Gets the directory name of the file being executed | |
current_directory = File.dirname(__FILE__) | |
puts "The current directory is #{current_directory}" | |
# expands to reveal the pwd (Present working directory) |
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require "resolv" | |
class Model < ActiveRecord::Base | |
validates :ip_address, format: { with: Resolv::IPv4::Regex } | |
validates :mac_address, format: { with: /\A([0-9A-F]{2}[-:]){5}([0-9A-F]{2})\z/ } | |
end |
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require 'yaml' | |
$db_file = 'filename.yaml' | |
def load_data | |
text = File.read 'db.yaml' | |
return YAML.load text | |
end | |
def store_data hash |