The first one is the "index" parameter, which represents the index number of each element.īasically, we can see the index number of an element if we include it as a second parameter: numbers. Using the traditional "for loop" to loop through the array would be like this: for (i = 0 i console.log(number)) Arrow Function Representation Optional Parameters IndexĪlright now let's continue with the optional parameters. I have also created an API to buy my token. I have also created frontend with next.js and ethers.js everything works perfectly.
It’s as simple as that Add New Element To Existing JSON Object: Say, you have an existing JSON object, which you want to modify to add new key/value pair (s). Viewed 14 times 0 I have a ERC20 token and I have created smart contract to buy and sell the token. In this post, we are going to take a closer look at the JavaScript forEach method.Ĭonsidering that we have the following array below: const numbers = Here, NodeJS automatically read the file, parses the content to a JSON object, and assigns that to the left-hand side variable. Each method has different features, and it is up to you, depending on what you're doing, to decide which one to use. The JavaScript forEach method is one of the several ways to loop through arrays.
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