{"version":"1.0","type":"rich","title":"simple-parallel-control-flow.js","description":"This example demonstrates a minimal asynchronous control-flow pattern using a counter-based callback mechanism. It shows how a JavaScript function can coordinate multiple parallel tasks by decrementing a shared counter, invoking a final callback only when all tasks complete. The `doParallel` function initializes the counter and returns a closure; each call to `next()` reduces the counter, and when it reaches zero, the callback logs `\"ok\"` to the console. The code uses plain JavaScript with no external libraries, highlighting a simple, dependency-free approach to parallel execution.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-56212d843310cd560e42?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}