Java Snippets
String.indexOf(subString/Character) to find the index of the substring or characters in the string
Example usage: 28. Implement strStr()
Django ORM
Retrieve all objects
MODEL.objects.all() — Return a QuerySet containing all MODEL objects
QuerySet is a iterable
123>>> from heritagesites.m
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MySQL Syntax
SQL Resources
SQL teaching
SQL Join infographic
Return a list of India’s UNESCO heritage sites
AS — aliasing of column names
LEFT JOIN — returns all
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Understanding Observable, Promise, and Callback
CallbacksA callback is that you register a piece of code (almost always a function) that will run when an event occurs.
12345678<button onclick="my
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[Leetcode] Two Pointers in Fast & Slow Problems
Floyd’s Tortoise and Hare Problem141. Linked List CycleLeetcode: https://leetcode.com/problems/linked-list-cycle/description/
Solution 1:
Use fast &am
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[Leetcode] Two Pointers in Sliding Window
IntroSliding Window for Substring problem Template:https://leetcode.com/problems/find-all-anagrams-in-a-string/discuss/92007/Sliding-Window-algorithm-
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[Leetcode] Memory and Recursion
Memory and Recursion
Understand Stack and Heap in Java: https://www.youtube.com/watch?v=450maTzSIvA
Heap: Used for dynamic allocation of memory. Onc
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Angular Basics I
Create new project
ng new PROJECT-NAME
cd PROJECT-NAME
ng serve
Navigate to http://localhost:4200/
Generate Component
ng generate component
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Java Basic I
Variables
8 Primitive Variables
int width of 32-bit, [-2^32, 2^32 - 1]. After Java 7, a long integer can be written as -2_147_483_648 to be easier t
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[ Leetcode ] Dynamic Programming
Target problemsDynamic Programming is targeting to solve most of the Optimization Problems.
Simple Subproblems: there should be a simple way of defin
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