If you try to run npm install some-module -g and you receive npm ERR! Error: EACCES, here are some options
npm install some-module -g
npm ERR! Error: EACCES
sudo
This is usually caused by inadvertently offering multiple ssh keys to the server. The server will reject any key after too many keys have been offered.
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Inside a class definition, $this refers to the current object, while self refers to the current class.
It is necessary to refer to a class element using self ,and refer to an object element using $this .Note also how an…