grapes-equals-grapes: Subtract In Place
In refer: Create Object References

Decrease the value of an object on the search path. Equivalent to '-=' in other languages. See incr for details on implementation.

1	x %-=% value

`x`	object to be modified; can be a symbol, character, or extraction language object.
`value`	value with which to change `x` by

the new value of x, invisibly

1
2
3

x <- 11:20
x %-=% 10
identical(x, 1:10)  # TRUE

refer documentation built on Nov. 8, 2021, 5:08 p.m.

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