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Expanding a variable in a pipe

2017-02-26 05:01:35
I have the following:

| curl -s -d 'payload={"text":"${URL}"}' https://……;

But the command is executed with the exact string ‘${URL}’, I assume because it 
is inside single quotes.

How do I expand this?


-- 
Apple broke AppleScripting signatures in Mail.app, so no random signatures.


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