7 советов по обработке «undefined» в JavaScript
5 сен 2017 ... Большинство современных языков вроде Ruby, Python и Java имеют .... function someFunc(array) { var index, item, length = array.length; // некоторый код. ... if (toAppend.last) { arrayCopy.push(toAppend.last); } return ...
PHP: последний элемент foreach. Альтернативнвый вариант ...
3 апр 2008 ... foreach ($array as $key => $value) { if($value == end($array)) { // делаем что- либо с ..... end($array); $array[key($array)] = "It's a last element";.
Codeforces Round #162 Tutorial - Codeforces
dp[c] := the maximal value of a sequence whose last ball's color is c ... If we remember the biggest two values of dp array in that time and their indexes in the array, otherMAX can be calculated using the ... Check whether the goal state is reachable from the start state. .... Is there a Ruby solution, which will pass the time test?
Underscore.js | русская документация
Вернёт позицию, на которой находится элемент value в массиве array, ..... JavaScript коллекцией функций в манере, близкой к Enumerable в Ruby. .... _. debounce'd functions now return their last updated value, just like _.throttle'd functions do. ... _.find and _.filter are now the preferred names for _.detect and _. select.
Rusrails: Валидации Active Record
class GoodnessValidator < ActiveModel::Validator def validate(record) if ... экземпляра, вместо него проще использовать обычные объекты Ruby: .... сделать, используя опции :if и :unless , которые принимают символ, Proc или Array .
PHP: Синтаксис генераторов - Manual
1: PHP Любит знаки доллара 2: Python Любит пробелы 3: Ruby Любит ... array (3) { [0]=> NULL [1]=> NULL [2]=> NULL } .... public function addValue($item) ... If for some strange reason you need a generator that doesn't yield anything, ...
<input type="file"> | MDN
16 май 2018 ... input элемент с атрибутом type="file" позволяет пользователю выбрать один файл или более из файлового хранилища своего ...
Сортировка выбором — Википедия
Сортировка выбором (Selection sort) — алгоритм сортировки. Может быть как устойчивый, ... Count; j++) 7 { 8 if (list[j] < list[min]) 9 { 10 min = j; 11 } 12 } 13 int dummy = list[i]; 14 list[i] = list[min]; 15 list[min] = dummy; 16 } 17 return list; 18 } ... Ruby. 1 def selection_sort(array) 2 for min in 0..array.count-2 3 least = min 4 for j ...
Ruby/Справочник/Hash — Викиучебник
Хеш подобен классу Array, за исключением того, что индексация .... Получение элемента — возвращает значение соответствующее ключу key.
Ruby/Справочник/Объединение — Викиучебник
... конца массива, то есть индексу -1 соответствует последний элемент массива, -2 — предпоследний, и так далее.
class Array - Documentation for Ruby 2.0.0 | Accessing Elements
Arrays are ordered, integer-indexed collections of any object. Array indexing starts at 0, as in C or Java. A negative index is assumed to be relative to the end of the array—that is, an index of -1 indicates the last element of the array, -2 is the next to last element in the array, and so on.
Ruby - Ruby: check if all array elements are equal
I want to check if all elements of an array are equal. For example, say I have an array of only 5s
How to get the last element of an array in Ruby? - Stack Overflow
Example: … How do I get the last value 5 in array a or last value 6 in array b without using a[3] and b[4]?
Ruby: check if all array elements are equal - Stack Overflow
I'm having a bit of a 'problem' with Ruby code. I want to check if all elements of an array are equal. For example, say I have an array of only 5s: …
Ruby Arrays: Insert, Append, Length, Index, Remove
Inserting elements in a ruby array is very straight forward. We have 3 methods on how to insert elements on arrays. Let’s try them on our example.
All but last element of Ruby array - Stack Overflow
Let's say I have a Ruby array … If I want all but the first item, I can write a.drop(1), which is great. If I want all but the last item, though, I can only think of this way … but neither of these seem as clean as...
Class: Array (Ruby 2.2.1) | Accessing Elements
Elements in an array can be retrieved using the #[] method. It can take a single integer argument (a numeric index), a pair of arguments (start and length) or a range. Negative indices start counting from the end, with -1 being the last element. arr = [1, 2, 3, 4, 5, 6] arr[2] #=> 3 arr[100] #=> nil arr[-3] #=> 4...
Learn How to Use Ruby Arrays in Less Than 10 Minutes - Mix & Go
The elements in the array don’t have to be of the same type. They can be anything. Even other arrays if you want.
Ruby/Rails: How to determine if one array contains all elements of...
Checking if a Ruby array’s elements are included in another array [duplicate].
ruby on rails - Check if element in array was created_at within last...
I have an array @user.photos which will return something like: … I want to create a conditional that will check if a user has recently created a photo Something like: @user.photos.any? { |x| x.created_at...