{

How to convert string to array in Solidity? Solidity by example?


This tutorial talks about how to convert a string of text into an array using a string separator.

The string is a valid value type in Solidity stores text content.

Array in solidity is a reference type that contains a group of data types stored under a single name variable. the values are retrieved using an index starting from zero.

There is no inbuilt function to convert string to array in solidity.

For example, a given input string contains

one-two-three-four

The above string is parsed and delimited by a hyphen(-) Output returns an array

one
two
three
four

How to Convert string to array in solidity with separator

This example uses stringutils of this package in solidity code.

The solidity-stringutils string library provides string manipulation utility functions.

First import custom library in a contract with the using keyword.

First, convert the original and delimiter string to slice using the toslice() method. Create a new string array with count method, return a string array of string[] memory Create an array type with the iterated string memory array and create an array of strings.

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.4.1;
import "https://github.com/Arachnid/solidity-stringutils/blob/master/src/strings.sol";

contract Contract {
    using strings for *;

    function smt()  public () {
        strings.slice memory stringSlice = "one-two-three-four".toSlice();
        strings.slice memory delimeterSlice = "-".toSlice();
        string[] memory strings = new string[](stringSlice.count(delimeterSlice));
        for (uint i = 0; i < strings.length; i++) {
           strings[i] = stringSlice.split(delim).toString();
        }
    }
}
THE BEST NEWSLETTER ANYWHERE
Join 6,000 subscribers and get a daily digest of full stack tutorials delivered to your inbox directly.No spam ever. Unsubscribe any time.

Similar Posts
Subscribe
You'll get a notification every time a post gets published here.