Detect device's OS in JavaScript

There comes a scenario when you might want to check which operating system the device is running. For instance, when you want to set device-specific download links. For windows, .exe file, for macOS, .dmg file and so on.

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Strict typing vs. Weak typing in PHP

With PHP 5, the core team had introduced type declarations (also known as type-hinting) that allow functions to require that parameters are of a certain type at call time. If the given value is of the incorrect type, then an error is generated: in PHP 5, this will be a recoverable fatal error, while PHP 7 will throw a TypeError exception.

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