Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in Go

Encode and Decode Strings

Explore how to encode arrays of strings into one compact string and decode them back to the original form using bitwise manipulation techniques. This lesson helps you understand constraints and implement both encode and decode functions to solve related coding interview problems.

We'll cover the following...

Statement

Create a method, encode, that converts an array of strings into a single string and then sends it over the network. Create another method, decode, that takes the encoded string and converts it back into the original array of strings.

Constraints:

  • 1≤1 \leq strings.length ≤100\leq 100
  • 0≤0 \leq strings[i].length ≤100\leq 100
  • strings[i] consist of any possible combinations of characters from 256 valid ASCII characters.

Examples

Understand the problem

Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

Encode and Decode Strings

1.

What will be the input data type of the encode function?

A.

String

B.

Array of strings

C.

Integer

D.

Boolean

1 / 4

Figure it out!

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Sequence - Vertical
Drag and drop the cards to rearrange them in the correct sequence.
1
2
3
4
5

Try it yourself

Implement your solution in the following coding playground.

usercode > EncodeDecode.go
package main
import (
	"bytes"
)
func encode(strings []string) string {
	// Replace this placeholder return statement with your code
	var encodedString bytes.Buffer
	return encodedString.String()
}
func decode(str string) []string {
	// Replace this placeholder return statement with your code
	var decodedString []string
	return decodedString
}
Encode and Decode Strings