edit item in collection

[Mr_Johnson]

I have a collection of five items, each item has an item ID (1 to 5)

Collect(Documents,{ID:"1",Title:"Staff Handbook",Read:"False"},{ID:"2",Title:"SOP Instructions",Read:"False"} .....);

As a GLOBAL variable/collection

My app opens a screen that displays a PDF.

I need  mechanism that changes an item from (as an example)

ID:"1",Title:"Staff Handbook",Read:"False"

to

ID:"1",Title:"Staff Handbook",Read:"True"

Ideally I would want to change the "read" field by just using the ID number(which is passed to the screen that displays the PDF). 

code = If user selects "read" button then the read field of item "ID" changes to true. 

[RandyHayes · Accepted solution]

@Mr_Johnson 

You can utilize the UpdateIf function to perform this.

   UpdateIf(Documents, ID=thePassedID, {Read:"True"})

I hope this is helpful for you.