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[Music] hello and welcome Im Dave today well learn about typescript index signatures the key of keyword and the record utility type Ill provide links to example source code and all resources in the description below Ive also recently started a Discord server and Ive provided a link for you to join in the description below its a great place to post any questions you have about this video and to chat with other web development students too were starting today with a main.ts file that is empty so if you have code from the last lesson you can just select that all with control a and press backspace to delete it after that lets go ahead and open up a terminal with control in the back tick and if you already have typescript started youll want control C to stop that because Im going to start it right here with TSC and then Dash W for the watch flag and this will take any of the code that we have in our main TS file and compile a main JS file inside of our build directory over here a