ProSoft Technology ProSoft i-View - Manual (Page 53)

ProSoft i-View ♦ Mobile Process Monitoring and Control Application Data Source Files
Version 2.0.2 User Manual
ProSoft Technology, Inc. Page 53 of 106
September 29, 2011
Numeric operators and methods.
num operator
num2 Arithmetic, comparison, logical operators produce the expected results.
Available operators are listed on the operators precedence table shown earlier.
The bitwise and complement operators extract the integral part of the operands
before computing the result
Example: 2+2 returns 4
num[n] Returns bit n from the integral part of num. Bit 0 is the least significant bit. The
result can be only 0 or 1.
Example: 3[0] returns 1
Example: 3[1] returns 1
Example: 3[2] returns 0
num.to_i Returns the integral part of num.
Example: 3.666.to_i returns 3
num.to_f Returns num
num.to_s
num.to_s(fmt) Returns a string representation of num optionally formatted according to fmt.
For a description of possible format specifiers refer to the format function.
Example: 3.666.to_s("%02d") results in "03"
Example: 3.666.to_s("%02f") results in "04"
Example: 3.666.to_s results in "3.666"
Example: 25.to_s("%02.1f ºC") results in "25.0 ºC"
( Note that specifying a format in to_s is not a standard feature of Ruby)
num.chr Returns a string containing a single character represented by the character
code num.
Example: 72.chr would return "H"
num.abs Returns the absolute value of num.
Example: (- 3.66).abs would return 3.66
num.round Returns num rounded to the nearest integer.
Example: 3.66.round would return 4