When interacting with data from different sources, like your local data and third-party services, the data has different styles and formats. Let’s say you’re using a camelCase format and other sources use everything in UPPERCASE. Independently of the situation, you may want to transform all keys of an …

Sometimes you’re running into use-cases where you need to detect whether a given number has decimal places. This tutorial shows you how to do that! {{outline}} Detect If a Number Has Decimal Places Generally, you may want to apply formatting on numbers. And you may want to round numbers …

All tutorials here at Future Studio carry a list of tags. We’re assigning tags to tutorials for some kind of grouping. Tutorials may belong to different topics and tags are a good use-case for that. On the server-side we’re using an array of strings for the tags. When …

When working with strings you may want to transform the first character of a given value. This could happen when you scaffold files for a project and want to ensure a given function name starts with a lowercased character. Or you’re doing something else and still want o know …

Changing only the first character of a string value in JavaScript may happen when you scaffold files or code in your projects. You may want to ensure a specific casing for your method or class names. For example, you could ensure a class name always starts with an uppercase character. …

Working with string values comes with some typical problems. One of them is to add a prefix to an existing string. For example, you might compose a URL and want a given URL path with a leading forward slash in case it’s not present on the current value. This …

Working with strings you’re running into typical use-cases. One of them is to append characters or words to an existing string. For example, you may want to check whether a view template file exists on your local hard disk. For that check you need the filename with extension. Your …

In web applications you may accept user inputs. The users fill out forms and submit them to send the values to your backend. Receiving data on your server usually comes with data validations. The validation steps could require a string value of a given length for a field. In other …