Thomas Lumley • 9/10/2019

(What’s up with the brackets?)

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This technical article examines a common R programming behavior: why wrapping an assignment in parentheses, like `(x = runif(10))`, causes the value to print. It delves into R's invisibility flag, how functions like `print()` and `boxplot()` use `invisible()` to suppress output, and how the primitive `(` function strips this invisibility, leading to the displayed result.

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(What’s up with the brackets?)

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