An iterable is a collection of items you can go through one by one, like a list or a set. It holds data in order, and you can loop over it easily. In Dart, you can turn an iterable into a stream — a sequence of events that send data over time. Creating streams from […]

A single data stream is a stream that sends just one piece of data and then closes. Unlike streams that send many values over time, this one sends only one event. You might use a single data stream when you want to deliver a simple message or result in a way that fits with other

In Dart, a Stream is like a path where data travels one piece at a time. You can listen to the stream and react when new data arrives. It’s useful when working with things that happen over time, like typing, loading, or network data. An Empty Stream is a stream that sends no data at

In Dart, streams are a way to handle many pieces of data that come over time. Instead of getting all the data at once, streams let you work with data as it arrives, one piece at a time. Think of streams like a river. Just as water flows continuously in a river, data flows in

NaN means “Not a Number.” It happens when a calculation does not give a real number. For example, dividing zero by zero or taking the square root of a negative number can create NaN. In Dart, NaN is a special value used to show that a number is not valid. It helps your program know

An empty string means the string has no characters at all — it is just “”. It’s like having a box with nothing inside. Checking if a string is empty helps in many situations. For example, when asking for user input, you want to know if the user typed anything or left it blank. It

Converting strings to numbers means changing text that looks like a number—like “123” or “3.14”—into actual number values that your program can use for math or calculations. This is useful when you get input as text, for example, from users typing in a form or reading data from files. To work with these inputs as

Converting numbers to strings means changing a number like 123 or 4.56 into text that looks like “123” or “4.56”. This helps when you want to show numbers in messages, print them, or join them with words. You might want to convert numbers to strings when building apps, writing messages, or formatting data for display.

In Dart, asynchronous means something that doesn’t happen right away — it happens later. For example, waiting for a message, loading a file, or getting data from the internet. Dart uses three main tools for this: async, await, and Future. These help your program keep running while waiting. This is useful when you don’t want

Dart is a programming language made by Google. It is used to build fast and good-looking apps for mobile phones, websites, and computers. If you’ve used Flutter, you’ve already used Dart. In Dart, you work with classes to create objects. A class is like a recipe — it tells the computer how to make and