In Python, there are 2 ways to delete a character from a string. Using replace Method The str.replace(old, new[, count]) method returns a copy of the string with all occurrences of substring old replaced by new. If the optional argument count is giv...

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 3 ways to get the position of a character. Using find Method The str.find(sub[, start[, end]]) method returns the lowest index in the string where substring sub is found within the slice s[start:end]. Optional arguments start an...

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 get key by value in dictionary. Using keys Function Basically, it separates the dictionary's values in a list, finds the position of the value you have, and gets the key at that position. The following example: #!...

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 Golang, there are 2 ways to pipe several commands. Using piped commands For example, this function retrieves the CPU model name using piped commands: package main import ( "fmt" "os/exec" ) func main() { cmd := "cat /proc/cpuinfo | eg...

In Python, there are 2 ways to check if an object is of a given type. Using isinstance Method The isinstance(object, classinfo) method returns True if the object argument is an instance of the classinfo argument, or of a (direct, indirect, or virtua...

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 Rust, there are 2 ways to index a string. Using as_bytes Function If the enum is C-like, then you can create a static array of each of the variants and return an iterator of references to them: fn main() { let s = "abc"; let b: u8 = s.as...

In Golang, there are 2 ways to index characters in a string. Using individual characters In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. Strings behave like slices of bytes. A rune is an integer value i...

In Rust, there are 3 ways to update a value in a mutable HashMap. Using get_mut Method The get_mut() method returns a mutable reference to the value corresponding to the key. See the following example: use std::collections::HashMap; fn main()...

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...

In Python, there are 3 ways to remove an element from a list by index. Using del Keyword There is a way to remove an item from a list given its index instead of its value. For example, #!/usr/bin/python3 # -*- coding: utf8 -*- l = [1, 2, 3, 4]...

In Golang, there are 2 ways to convert byte array to string.Using string Function The easiest way to convert []byte to string in Golang: package main import "fmt" func main() { b := []byte{'a', 'b', 'c'} s := string(b[:]) fmt.Printf("%...