Great Stack Overflow questions and answers

Karol Dowbecki · March 27, 2020

Stack Overflow

Stack Overflow was launched over 11 years ago. Since then more than 19 million questions were asked and only Jon Skeet read them all. Below you can find a handful of my favourite questions. Each of them is answered in depth, providing a chance to learn something interesting.

Java

• Does Java JIT cheat when running JDK code?

• Why indirect increment is faster than direct inc?

• Why is 2 * (i * i) faster than 2 * i * i in Java?

• Why does array[idx++]+=“a” increase idx once in Java 8 but twice in Java 9 and 10?

• Why filter() after flatMap() is “not completely” lazy in Java streams?

• Parallel Infinite Java Streams run out of Memory

JavaScript

• Why does ++[[]][+[]]+[+[]] return the string “10”?

General

• Is floating point math broken?

• UTF-8 all the way through

• Skip List vs. Binary Search Tree

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