Source: https://habr.com/ru/post/1731420/More articles:Google analytics - tracking events that happened in the past - loggingVertical Alignment for Dropdown - cssGood place to study image processing in c / c ++? - c ++Running NSTimer in Stream - iphonephp: How to check a field has null / null / null? - phpHow to avoid thumbs.db file compression - compressionCalculate week number for month - c #How can I specify an administrator fee in PayPal when ordering less than two items? - paypalКто-нибудь знает хороший OpenGL 2.x Cheatsheet для начинающих? - openglDetect if java is installed on a web server with php - javaAll Articles