Using a filename as a function input
While creating a new function that reads the file, passing the filename as an argument is not considered best practice and might have negative effects such as making it difficult to write test cases for a variety of criteria. Suppose we want to implement a function to count the number of empty lines in a…
Ignoring how defer arguments are evaluated
In order to understand how arguments are processed using the defer keyword, let’s consider a specific example. Suppose we have a function that needs to execute two other functions, called foo and bar. Additionally, this function needs to handle some status information related to its execution. We can use the defer keyword to ensure that…
Misunderstanding variable scope in JavaScript
In this post, we are going to understand variable scope and difference between var, let and const keywords in javascript. Variable scope is tricky concept for new developers., especially in javascript. Most of beginner developers make common mistake like defining the variable inside the function and expecting it to access outside the function. Understanding var,…
Object references and copying
One of the fundamental differences of objects versus primitives is that objects are stored and copied “by reference”, whereas primitive values: strings, numbers, booleans, etc – are always copied “as a whole value”. That’s easy to understand if we look a bit under the hood of what happens when we copy a value. Let’s start…
Introducing constructors
If we need to create multiple object of same shape then one of the way to define the shape of is by using the function. we have to create an empty object, initialize it, and return it. A better way is to use a constructor. A constructor is just a function called using the new keyword. When…
Scheduling: setTimeout and setInterval
We may decide to execute a function not right now, but at a certain time later. That’s called “scheduling a call”. There are two methods for it: These methods are not a part of JavaScript specification. But most environments have the internal scheduler and provide these methods. In particular, they are supported in all browsers…
Using defer inside a loop
The defer keyword allows a function call to be postponed until the surrounding function has completed execution. This can be useful for reducing redundancy in code, such as when a resource needs to be closed after use. However, it’s important to be mindful of using defer within a loop, as it can have unintended consequences…
Thinking concurrency is always faster
Many developers mistakenly believe that a concurrent solution will always be faster than a sequential one, but this is not always the case. The performance of a solution depends on various factors, such as the efficiency of the concurrency structure, the parts that can be processed in parallel, and the level of contention among the…
Function in JavaScript
A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and return an output where there is some obvious relationship between the input and the output. We can separate function in…
Stripe Payment with Golang
In this blog post, I will discussed on the topic of stripe payment integration with Golang. Before that i will give brief introduction about this and move head to simple implementation. It is a famous payment gateway that helps in financial transaction between merchants and customers. It accepts 133+ countries currency. It is a powerful…