2KAbhishek Blogs

What if you are given a problem where you have to add two integers but you can't use any arithmetic operators ( + - * / % // ** ), like LeetCode's problem #371 . How do we approach this problem? Answer: Bit manipulation Problems like this can be solved using bit-wise operators as basic mathematics rules work in the same way whether it be binary or decimal. All we have to do is: Figure out how the basic mathematical operation works step by step. Replicate these operators using bit-wise operators ( & | ~ ^ << >> ). In case of addition in decimal system the process looks something like this: If sum of two digits is less than 10 we add it to our sum. If sum is greater than 10 then we add the least significant bit to sum and carry 1 to next operation. When doing this operation in binary which bit-wise operators do we need? Let's look at an example: 2 + 1 = 3 2 in binary is 010 1 in binary is 001 3 in binary is 011 Which b...

If you code professionally or as a hobby or are just learning to code, tracking code time can be very useful to you as it can unlock some valuable insights for you. I recently came across one such tool and have a overview of its features here. Wakatime is one of those tools . the help of a  you can easily logs all your coding activities like: ▪️which editor you are using ▪️which project you are working on ▪️which language you are using All that data is presented very gracefully on the wakatime dashboard . Another great feature of wakatime is goals where you can set goals for yourself and wakatime will keep track of those goals and send reminders via mail as well. This can help you if you are trying to learn a certain framework or library or language or maybe you are trying to learn a new editor like vim. Wakatime also has other features like shareable embeddables, leaderboards, integrations etc. This kind of gamifies programming and makes it a l...