Accessing Data • index: Use [0] to get the first item. • at (): A modern way to get items. You can use negative numbers like -1 to get items from the end. This is safer than standard bracket notation ...
🔥 This is a perfect “pre-flight checklist” before diving into advanced algorithms. HashMaps, recursion, DFS/BFS, binary search, sliding window, heaps — master these, and a lot of interview problems ...
The Slow & Fast Pointers pattern (also known as Floyd's Cycle Detection Algorithm) uses two pointers moving at different speeds to traverse a linear or cyclic structure. It is commonly applied to ...
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