spsUtil (version 0.2.2)

inc: In-place operations

Description

In-place operations like i += 1, i -= 1 is not support in R. These functions implement these operations in R.

Usage

inc(e1, e2 = 1)
mult(e1, e2 = 2)
divi(e1, e2 = 2)

Arguments

e1

object, most likely a numeric object

e2

the operation value, the value to add, subtract, multiply, divide of.

Value

No return, directly assign the value back to e1

Details

inc(i) is the same as i <- i + 1. inc(i, -1) is the same as i <- i - 1. mult(i) is the same as i <- i * 2. divi(i) is the same as i <- i / 2.

See Also

If you want shiny::reactiveVal version of these operators, check spsComps. shiny::reactiveValues operation will be the same as normal values.

Examples

# NOT RUN {
i <- 0
inc(i) # add 1
i
inc(i) # add 1
i
inc(i, -1) # minus 1
i
inc(i, -1) # minus 1
i
x <- 1
mult(x) # times 2
x
mult(x) # times 2
x
divi(x) # divide 2
x
divi(x) # divide 2
x
# }