Variadic Functions Tutorial with Examples in Go. Variadic Function A variadic function is one that can be called with varying numbers of arguments. The most familiar examples are fmt.Printf and its variants. package main import "fmt" func add(v...

In Rust, there are 2 ways to sort a vector. Using sort Method The sort(&mut self) method sorts the slice. This sort is stable (i.e., does not reorder equal elements) and O(n * log(n)) worst-case. For example, fn main() { let mut v = [3, -5, ...

In Golang, there are 2 ways to check if a slice contains an element. Using contains Function The following example should cover whatever you are trying to do: package main import "fmt" func Contains[E comparable](s []E, v E) bool { for _, ...

In PHP, there are 3 ways to delete an element from an array. Using unset Function The unset(mixed $var, mixed ...$vars): void function destroys the specified variables. For example, $arr = ["a", "b", "d"]; unset($arr[1]); print_r($arr); Arr...

In Python, there are 2 ways to append integer to beginning of list. Using insert Method The list.insert() method inserts an item at a given position. The first argument is the index of the element before which to insert. For example, #!/usr/bin...

In Python, there are 3 ways to remove all empty strings from a list of strings. Using filter Function The filter(function, iterable) function constructs an iterator from those elements of iterable for which function returns true. The following exam...

In Python, using the str.join function is the easiest way to concatenate a list of strings into a single string Using str.join Function The str.join() method returns a string which is the concatenation of the strings in iterable. A TypeError will be...

In Rust, there are 2 ways to remove an element from a vector. Using retain Function The vec::retain() function retains only the elements specified by the predicate. For example, fn main() { let mut v = vec![1, 3, 2, 3, 4]; v.retain(|&x| x ...

In Python, there are 3 ways to delete a list element by value. Using list.remove Function The list.remove(x) function removes the first item from the list whose value is equal to x. It raises a ValueError if there is no such item. See the following...

In Python, there are 3 ways to remove duplicates in list. Using Built-in set Function The built-in set() function returns a new set object, optionally with elements taken from iterable. If you later need a real list again, you can similarly pass the...

In Golang, using the len function is the easiest way to count the items in the map structure. Using len Function The built-in function len take arguments of various types and return a result of type int. The implementation guarantees that the result...

In Rust, using the position function is the easiest way to find the index of an element in a vector. Using position Method The position() method searches for an element in an iterator, returning its index. position() is short-circuiting; in other ...

In Python, there are 3 ways to generate random integers between 0 and 9. Using randrange Method The random.randrange(start, stop[, step]) method returns a randomly selected element from range(start, stop, step). For example, #!/usr/bin/python3 ...

In Python, there are 3 ways to count the occurrences of a list item. Using count Method The str.count() method returns the number of non-overlapping occurrences of substring sub in the range [start, end]. Optional arguments start and end are interpr...

In Python, there are 3 ways to randomly select a element from list. Using random.choice Method The random.choice() method returns a random element from the non-empty sequence seq. If seq is empty, raises IndexError. For example, #!/usr/bin/pyth...