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Articles tagged with #2articles1week
Why async/await Was Introduced Before async/await, we used: callbacks (callback hell) promises (.then chains) Example with promises: fetchData() .then(data => processData(data)) .then(result =
What the Spread Operator Does The spread operator (...) is used to expand values. In simple words: 👉 Spread = “values ko tod dena / expand kar dena” Example with Array let arr = [1, 2, 3]; console
What String Methods Are String methods are built-in functions that help us work with strings.In simple words: 👉 They are ready-made tools to manipulate text.Examples: let str = "hello world"; consol
What the new Keyword Does The new keyword is used to create a new object from a constructor function. In simple words: 👉 new ek naya object banata hai using a blueprint. Constructor Functions A cons
What is a Callback Function A callback function is simply:A function that is passed as an argument to another function and is executed later. In simple words: “Function ke andar function bhejna, aur b
What Nested Arrays Are First, understand the basicA nested array means an array inside another array. Example: let arr = [1, 2, [3, 4], [5, 6]]; Here: 1, 2 → normal values [3,4], [5,6] → nested arr
