Examples of Gosu conditional iteration and looping

The following examples illustrate different techniques for iterating through the members of an array or list.

Example: Printing all letters in a string with their index

for (letter in gw.api.util.StringUtil.splitWhitespace("a b c d e") index i) {
  print("Letter " + i + ": " + letter)
}

The output of this code is the following lines:

Letter 0: a
Letter 1: b
Letter 2: c
Letter 3: d
Letter 4: e

Example: Printing all Policy properties by using reflection

for (prop in PolicyGosu.Type.TypeInfo.Properties) {
  print(prop)
}

The output of this code is the following lines:

Class
Bundle
OriginalVersion
IntrinsicType
Changed
ChangedFields
DisplayName
ChangedProperties
NewlyImported
ID
PublicID
...

Example: Ensuring that array elements have a minimum value

var colors = {"red", "orange", "yellow", "green", "blue", "indigo", "violet"}
var  blueshift = new String()

var r : int = (Math.random() * 6) as int
blueshift = colors[r]

// Shift the color at least one step to the blue end of the spectrum
do {
  r += 1
  blueshift = colors[r]
} while (r < 3) // Minimum color is "green"

print(blueshift)

Running this code multiple times produces lines similar to the following:

blue
green
green
green
green
blue
violet
green
blue
indigo