The Ring programming language version 1.4 book - Part 9 of 30

Ring Documentation, Release 1.4
Package Package1
Class class1
Func f1
Package Package2
Class class1
Func f1
Package Package3
Class class1
Func f1
Package Package4
Class class1
Func f1
Output:
1
1
0
1
38.11 classes() Function
We can get a list of classes names using the classes() function.
Syntax:
classes() --> a list contains classes names
Example:
See classes()
Class class1
Func f1
Class class2
Func f1
Class class3
Func f1
Output:
class1
class2
class3
38.12 isclass() Function
We can check if a class is deﬁned or not using the isclass() function.
Syntax:
38.11. classes() Function 218

isclass(cClassName) --> returns 1 if the Class is defined
returns 0 if the Class is not defined
Example:
see isclass("class4") + nl +
isclass("class3") + nl +
isclass("class2") + nl
Class class1
func f1
class class2
func f1
class class3
func f1
Output:
0
1
1
38.13 packageclasses() Function
We can get a list of classes names inside a package using the packageclasses() function.
Syntax:
packageclasses(cPackageName) --> a list contains classes names inside the package
Example:
see "classes in Package1" + nl
see packageclasses("Package1")
see "classes in Package2" + nl
see packageclasses("Package2")
Package Package1
Class class1
Func f1
Package Package2
Class class1
Func f1
Class class2
Func f1
Class class3
func f1
Output:
classes in Package1
class1
classes in Package2
class1
38.13. packageclasses() Function 219

class2
class3
38.14 ispackageclass() Function
We can check if a class is deﬁned inside package or not using the ispackageclass() function.
Syntax:
ispackageclass(cPackageName,cClassName) --> returns 1 if the Class is defined
returns 0 if the Class is not defined
Example:
see ispackageclass("package1","class1") + nl +
ispackageclass("package1","class2") + nl +
ispackageclass("package2","class1") + nl +
ispackageclass("package2","class2") + nl
Package Package1
Class class1
Func f1
Package Package2
Class class1
Func f1
Class class2
Func f1
Class class3
func f1
Output:
1
0
1
1
38.15 classname() Function
We can know the class name of an object using the classname() function
Syntax:
classname(object) --> Returns the object class name
Example:
o1 = new point
o2 = new rect
see classname(o1) + nl # print point
see classname(o2) + nl # print rect
class point
class rect
38.14. ispackageclass() Function 220

38.16 objectid() Function
We can know the object id using the objectid() function
Syntax:
objectid(object) --> Returns the object id
Example:
o1 = new point
see objectid(o1) + nl
test(o1)
func test v
see objectid(v) + nl
Class point x y z
Output:
021B5808
021B5808
38.17 isobject() Function
We can check the variable to know if it’s an object or not using the isobject() function
Syntax:
isobject(variable) --> Returns True if it's an object, False if it's not
38.18 attributes() Function
We can get the object attributes using the attributes() function
Syntax:
attributes(object) --> Returns a list contains the object attributes
Example:
o1 = new point
aList = attributes(o1) # we can use see attributes(o1)
for t in aList see t next # print xyz
Class Point x y z
38.19 methods() Function
We can get the object methods using the methods() function
Syntax:
38.16. objectid() Function 221

methods(object) --> Returns a list contains the object methods
Example:
o1 = new test
aList = methods(o1)
for x in aList
cCode = "o1."+x+"()"
eval(cCode)
next
Class Test
func f1
see "hello from f1" + nl
func f2
func f3
func f4
Output:
hello from f1
hello from f2
hello from f3
hello from f4
38.20 isattribute() Function
We can test if the object contains an attribute or not using the isattribute() function
Syntax:
isattribute(object,cAttributeName) --> Returns True if the object contains the attribute
Example:
o1 = new point
see isattribute(o1,"x") + nl # print 1
see isattribute(o1,"t") + nl # print 0
see isattribute(o1,"y") + nl # print 1
see isattribute(o1,"z") + nl # print 1
class point x y z
38.21 isprivateattribute() Function
We can test if the object contains a private attribute or not using the isprivateattribute() function
Syntax:
38.20. isattribute() Function 222

isprivateattribute(object,cAttributeName) --> Returns True if the object
contains the private attribute
Example:
o1 = new person
see isprivateattribute(o1,"name") + nl +
isprivateattribute(o1,"address") + nl +
isprivateattribute(o1,"phone") + nl +
isprivateattribute(o1,"job") + nl +
isprivateattribute(o1,"salary")
Class Person
name address phone
private
job salary
Output:
0
0
0
1
1
38.22 ismethod() Function
We can test if the object class contains a method or not using the ismethod() function
Syntax:
ismethod(object,cMethodName) --> Returns True if the object class contains the method
Example:
o1 = new point
see ismethod(o1,"print") + nl # print 1
mylist = []
mylist + new point
see ismethod(mylist[1],"print") + nl # print 1
class point x y z
func print
see x + nl + y + nl + z + nl
38.23 isprivatemethod() Function
We can test if the object class contains a private method or not using the isprivatemethod() function
Syntax:
38.22. ismethod() Function 223

isprivatemethod(object,cMethodName) --> Returns True if the object class contains
the private method
Example:
o1 = new Test
see isprivatemethod(o1,"f1") + nl +
isprivatemethod(o1,"f2")
Class Test
func f1
see "message from f1()" + nl
private
func f2
see "message from f2()" + nl
Output:
0
1
38.24 addattribute() Function
We can add an attribute (or a group of attributes) to the object state (not the class) using the addattribute() function
Syntax:
AddAttribute(object,cAttributeName|aAttributesList)
Example(1):
see new point {x=10 y=20 z=30}
Class Point
AddAttribute(self,["x","y","z"])
Example(2):
o1 = new point
addattribute(o1,"x")
addattribute(o1,"y")
addattribute(o1,"z")
see o1 {x=10 y=20 z=30}
class point
Output:
x: 10.000000
y: 20.000000
z: 30.000000
38.25 addmethod() Function
We can add a method to the object class using the addmethod() function This method can be used with any object from
the same class.
38.24. addattribute() Function 224

Syntax:
AddMethod(Object,cNewMethodName,cMethodName|AnonymousFunction)
Example:
o1 = new point { x=10 y=20 z=30 }
addmethod(o1,"print", func { see x + nl + y + nl + z + nl } )
o1.print()
Class point
x y z
Output:
10
20
30
Instead of using anonymous function to add new method to the class, we can use the function name
Example:
o1 = new point { x=10 y=20 z=30 }
myfunc = func { see x + nl + y + nl + z + nl }
addmethod(o1,"print", myfunc )
addmethod(o1,"display", myfunc )
addmethod(o1,"show", myfunc )
o1.print()
o1.display()
o1.show()
Class point
x y z
Output:
10
20
30
10
20
30
10
20
30
Since we add the method to the class, any object from that class can use this method
Example:
o1 = new point { x=10 y=20 z=30 }
o2 = new point { x=100 y=200 z=300 }
o3 = new point { x=50 y=150 z=250 }
addmethod(o1,"print", func { see x + nl + y + nl + z + nl } )
38.25. addmethod() Function 225

o1.print()
o2.print()
o3.print()
Class point
x y z
Output:
10
20
30
100
200
300
50
150
250
38.26 getattribute() function
We can get the object attribute value using the getattribute() function
Syntax:
GetAttribute(oObject,cAttributeName) ---> Attribute Value
Example:
o1 = new point
see getattribute(o1,"name") + nl +
getattribute(o1,"x") + nl +
getattribute(o1,"y") + nl +
getattribute(o1,"z") + nl
Class Point
x=10 y=20 z=30
name = "3D-Point"
Output:
3D-Point
10
20
30
Example:
We can Find a Class List Member using GetAttribute() using a function ﬁndclass() The Find uses the member name,
rather than the column number
myList =
[new Company {position=3 name="Mahmoud" symbol="MHD"},
new Company {position=2 name="Bert" symbol="BRT"},
new Company {position=1 name="Ring" symbol="RNG"}
]
38.26. getattribute() function 226

see myList
see nl +"=====================" + nl + nl
for i = 1 to len(myList)
see "Pos: "+ i +" | "+ myList[i].position +" | "+ myList[i].name +
" | "+ myList[i].symbol +" | "+ nl
next
See findclass(myList, "MHD", "symbol") +nl ### Specify Member class name
###---------------------------------------
func findclass classList, cValue, classMember
See nl + "FindClass: " +" "+ cValue + nl + nl
for i = 1 to len(classList)
result = getattribute( classList[i], classMember )
See "Result-Attr: " + i +" "+ result +nl
if result = cValue
j = i
ok
next
return j
###--------------------------------------
class company position name symbol
Output:
Pos: 1 | 3 | Mahmoud | MHD |
Pos: 2 | 2 | Bert | BRT |
Pos: 3 | 1 | Ring | RNG |
FindClass: MHD
Result-Attr: 1 MHD
Result-Attr: 2 BRT
Result-Attr: 3 RNG
1
38.27 setattribute() function
We can set the object attribute value using the setattribute() function
Syntax:
SetAttribute(oObject,cAttributeName,Value)
Example:
o1 = new person
setattribute(o1,"cName","Mahmoud")
38.27. setattribute() function 227

setattribute(o1,"nSalary",1000000)
setattribute(o1,"aColors",["white","blue","yellow"])
see o1
see o1.aColors
Class Person
cName
nSalary
aColors
Output:
cname: Mahmoud
nsalary: 1000000.000000
acolors: List...
white
blue
yellow
38.28 mergemethods() Function
We can share methods between classes without inheritance using the MergeMethods() function
This function merge class methods to another class.
Syntax:
MergeMethods(cClassNameDestination,cClassNameSource)
Example:
mergemethods("count","share")
mergemethods("count2","share")
o1 = new count { test() }
o1 = new count2 { test() }
Class Share
func one
see "one" + nl
func two
see "two" + nl
func three
see "three" + nl
Class Display
Func printline
see copy("*",20) + nl
Class Count from Display
Func test
printline()
one()
two()
three()
printline()
38.28. mergemethods() Function 228

Class Count2 from Display
Func test
three()
two()
one()
printline()
Output:
********************
one
two
three
********************
three
two
one
********************
38.29 packagename() Function
We can know the package name of the latest sucessful import command using the packagename() function
Syntax:
packagename() --> Returns the package name of the latest sucessful import
Example:
load "weblib.ring"
import System.web
see packagename() # system.web
38.29. packagename() Function 229

CHAPTER
THIRTYNINE
STDLIB FUNCTIONS
In this chapter we are going to learn about functions in the stdlib.ring
39.1 puts() function
print the value then print new line (nl)
Syntax:
puts(expr)
Example:
Load "stdlib.ring"
Puts("Hello, World!")
39.2 print() function
print string - support n,t and r
Also we can use #{variable_name} to insert variables values.
Syntax:
print(string)
Example:
Load "stdlib.ring"
print("nHello, WorldnnHow are you? tt I'm fine!n")
x=10 y=20
print("nx value = #{x} , y value = #{y} n")
39.3 getstring() function
Get input from the keyboard - return value as string
getstring() ---> string
230

39.4 getnumber() function
Get input from the keyboard - return value as number
getnumber() ---> number
39.5 apppath() function
Get the path of the application folder
Syntax:
AppPath() ---> The path as String
Example:
Load "stdlib.ring"
# Application Path
Puts("Test AppPath()")
See AppPath() + nl
39.6 JustFilePath() function
Get the path of the file, remove the file name.
Syntax:
JustFilePath(cFile) ---> The path as String
Example:
load "stdlib.ring"
see justfilePath("b:ringapplicationsrnoternote.ring")
Output:
b:ringapplicationsrnote
39.7 JustFileName() function
Get the file, remove the file path.
Syntax:
JustFileName(cFile) ---> The file name as String
Example:
load "stdlib.ring"
see justfileName("b:ringapplicationsrnoternote.ring")
39.4. getnumber() function 231

Output:
rnote.ring
39.8 value() function
create a copy from a list or object
Syntax:
value(List) ---> new list
Example:
Load "stdlib.ring"
aList = 1:10
del(value(aList),1) # delete first item
see aList # print numbers from 1 to 10
39.9 times() function
Execute a Function nCount times
Syntax:
Times(nCount,function)
Example:
Load "stdlib.ring"
Puts("Test Times()")
Times ( 3 , func { see "Hello, World!" + nl } )
39.10 map() function
Execute a Function on each list item
Syntax:
Map(alist,function)
Example:
Load "stdlib.ring"
Puts("Test Map()")
See Map( 1:10, func x { return x*x } )
39.8. value() function 232

39.11 filter() function
Execute a Function on each list item to filter items
Syntax:
Filter(alist,function)
Example:
Load "stdlib.ring"
Puts("Test Filter()")
See Filter( 1:10 , func x { if x <= 5 return true else return false ok } )
39.12 split() function
Convert string words to list items
Syntax:
Split(cstring,delimiter) ---> List
Example:
Load "stdlib.ring"
Puts("Test Split()")
See Split("one two three four five"," ")
39.13 splitmany() function
Convert string words to list items. Allow many delimiters.
Syntax:
SplitMany(cstring,delimiters as string or list) --> List
Example:
Load "stdlib.ring"
Puts("Test SplitMany()")
See SplitMany("one,two,three,four and five"," ,")
39.14 newlist() function
Create a two dimensional list
Syntax:
NewList(nRows,nColumns) ---> new list
Example:
39.11. filter() function 233

Load "stdlib.ring"
Puts("Test Newlist()")
a1 = 3
a2 = 5
chrArray = newlist(a1,a2)
numArray = newlist(a1,a2)
chrArray[1][1] = "Hello"
numArray[1][1] = 987.2
See chrArray[1][1] + nl
See numArray[1][1] + nl
39.15 capitalized() function
Return a copy of a string with the ﬁrst letter capitalized
Syntax:
Capitalized(string) ---> string
Example:
Load "stdlib.ring"
Puts("Test Capitalized()")
See capitalized("welcome to the Ring Programming Language")
39.16 isspecial() function
Check whether a character is special or not
Syntax:
IsSpecial(char) ---> True/False
Example:
Load "stdlib.ring"
Puts("Test Isspecial()")
See "Isspecial = " + isSpecial("%") + nl
39.17 isvowel() function
Check whether a character is vowel or not
Syntax:
IsVowel(char) ---> True/False
Example:
39.15. capitalized() function 234

Load "stdlib.ring"
Puts("Test Isvowel()")
See "Isvowel = " + isVowel("c") + nl
39.18 linecount() function
Return the lines count in a text file.
Syntax:
LineCount(cFileName) ---> Lines Count as number
Example:
Load "stdlib.ring"
Puts("Test Linecount()")
See "the number of lines = " + lineCount("test.ring")
39.19 factorial() function
Return the factorial of a number
Syntax:
Factorial(number) ---> number
Example:
Load "stdlib.ring"
Puts("Test Factorial()")
see "6 factorial is : " + Factorial(6)
39.20 fibonacci() function
Return the fibonacci number
Syntax:
Fibonacci(number) ---> number
Example:
Load "stdlib.ring"
Puts("Test Fibonacci()")
see "6 Fibonacci is : " + Fibonacci(6)
39.18. linecount() function 235

39.21 isprime() function
Check whether a number is prime or not
Syntax:
isprime(number) ---> Number
Example:
Load "stdlib.ring"
Puts("Test Isprime()")
if isPrime(16) see "16 is a prime number"
else see "16 is not a prime number" ok
39.22 sign() function
Returns an integer value indicating the sign of a number.
Syntax:
Sign(number) ---> number ( -1 = negative , 0 , 1 (positive) )
Example:
Load "stdlib.ring"
Puts("Test Sign()")
see "sign of 12 is = " + sign(12) + nl
39.23 list2file() function
Write list items to text file (each item in new line).
Syntax:
List2File(aList,cFileName)
Example:
Load "stdlib.ring"
# Test List2File
Puts("Test List2File()")
list2file(1:100,"myfile.txt")
39.24 file2list() function
Read text file and convert lines to list items
Syntax:
39.21. isprime() function 236

File2List(cFileName) ---> List
Example:
Load "stdlib.ring"
# Test File2List
Puts("Test File2List()")
see len(file2list("myfile.txt"))
39.25 startswith() function
Returns true if the given string starts with the speciﬁed substring.
Leading white spaces are ignored.
Syntax:
StartsWith(string, substring) ---> True/False
Example:
Load "stdlib.ring"
Puts("Test Startswith()")
see Startswith("CalmoSoft", "Calmo") + nl
39.26 endswith() function
Returns true if the given string ends with the speciﬁed substring.
Trailing white spaces are ignored.
Syntax:
Endswith(string, substring) ---> True/False
Example:
Load "stdlib.ring"
Puts("Test Endswith()")
see endsWith("CalmoSoft", "Soft") + nl
39.27 gcd() function
Finding of the greatest common divisor of two integers.
Syntax:
Gcd(number,number) ---> number
Example:
39.25. startswith() function 237

Load "stdlib.ring"
Puts("Test Gcd()")
see gcd (24, 32) + nl
39.28 lcm() function
Compute the least common multiple of two integers.
Syntax:
lcm(number,number) ---> number
Example:
Load "stdlib.ring"
Puts("Test Lcm()")
see Lcm(24,36) + nl
39.29 sumlist() function
Compute the sum of a list of integers.
Syntax:
sumlist(list) ---> number
Example:
Load "stdlib.ring"
Puts("Test Sumlist()")
aList = [1,2,3,4,5]
see Sumlist(aList) + nl
39.30 prodlist() function
Compute the product of a list of integers.
Syntax:
prodlist(list) ---> number
Example:
Load "stdlib.ring"
Puts("Test Prodlist()")
aList = [1,2,3,4,5]
see Prodlist(aList) + nl
39.28. lcm() function 238

39.31 evenorodd() function
Test whether an integer is even or odd.
Result of test (1=odd 2=even).
Syntax:
evenorodd(number) ---> 1 (odd) or 2 (even)
Example:
Load "stdlib.ring"
Puts("Test Evenorodd()")
nr = 17
see Evenorodd(nr) + nl
39.32 factors() function
Compute the factors of a positive integer.
Syntax:
factors(list) ---> list
Example:
Load "stdlib.ring"
Puts("Test Factors()")
n = 45
aList = factors(n)
see "Factors of " + n + " = "
for i = 1 to len(aList)
see "" + aList[i] + " "
next
39.33 palindrome() function
Check if a sequence of characters is a palindrome or not.
Syntax:
Palindrome(String) ---> True/False
Example:
Load "stdlib.ring"
Puts("Test Palindrome()")
cString = "radar"
see Palindrome(cString)
39.31. evenorodd() function 239

39.34 isleapyear() function
Check whether a given year is a leap year in the Gregorian calendar.
Syntax:
Isleapyear(number) ---> True/False
Example:
Load "stdlib.ring"
Puts("Test Isleapyear()")
year = 2016
if Isleapyear(year) see "" + year + " is a leap year."
else see "" + year + " is not a leap year." ok
39.35 binarydigits() function
Compute the sequence of binary digits for a given non-negative integer.
Syntax:
binarydigits(number) ---> string
Example:
Load "stdlib.ring"
Puts("Test Binarydigits()")
b = 35
see "Binary digits of " + b + " = " + Binarydigits(b)
39.36 matrixmulti() function
Multiply two matrices together.
Syntax:
Matrixmulti(List,List) ---> List
Example:
Load "stdlib.ring"
# Multiply two matrices together.
Puts("Test Matrixmulti()")
A = [[1,2,3], [4,5,6], [7,8,9]]
B = [[1,0,0], [0,1,0], [0,0,1]]
see Matrixmulti(A, B)
39.37 matrixtrans() function
Transpose an arbitrarily sized rectangular Matrix.
39.34. isleapyear() function 240

Syntax:
Matrixtrans(List) ---> List
Example:
Load "stdlib.ring"
# Transpose an arbitrarily sized rectangular Matrix.
Puts("Test Matrixtrans()")
matrix = [[78,19,30,12,36], [49,10,65,42,50], [30,93,24,78,10], [39,68,27,64,29]]
see Matrixtrans(matrix)
39.38 dayofweek() function
Return the day of the week of given date. (yyyy-mm-dd)
Syntax:
dayofweek(string) ---> string
Example:
Load "stdlib.ring"
# Return the day of the week of given date.
Puts("Test Dayofweek()")
date = "2016-04-24"
see "Data : " + date + " - Day : " + Dayofweek(date) + nl
39.39 permutation() function
Generates all permutations of n different numerals.
Syntax:
permutation(list)
Example:
Load "stdlib.ring"
# Generates all permutations of n different numerals
Puts("Test Permutation()")
list = [1, 2, 3, 4]
for perm = 1 to 24
for i = 1 to len(list)
see list[i] + " "
next
see nl
Permutation(list)
next
39.38. dayofweek() function 241

39.40 readline() function
Read line from ﬁle
Syntax:
readline(fp) ---> string
Example:
Load "stdlib.ring"
# Read a file line by line.
Puts("Test Readline()")
fp = fopen("test.ring","r")
while not feof(fp)
See Readline(fp) end
fclose(fp)
39.41 substring() function
Return a position of a substring starting from a given position in a string.
Syntax:
Substring(str,substr,npos) ---> string
Example:
Load "stdlib.ring"
# Return a position of a substring starting from a given position in a string.
Puts("Test Substring()")
a = "abcxyzqweabc"
b = "abc"
i = 4
see substring(a,b,i)
39.42 changestring() function
Change substring from given position to a given position with another substring.
Syntax:
Changestring(cString, nPos1, nPos2, cSubstr) ---> cString
Example:
Load "stdlib.ring"
# Change substring from given position for given position with a substring.
Puts("Test Changestring()")
see Changestring("Rmasdg",2,5,"in") # Ring
39.40. readline() function 242

39.43 sleep() function
Sleep for the given amount of time.
Syntax:
sleep(nSeconds)
Example:
Load "stdlib.ring"
Puts("Test Sleep()")
see "Wait 3 Seconds!"
Sleep(3)
see nl
39.44 ismainsourcefile() function
Check if the current file is the main source file
Syntax:
IsMainSourceFile() ---> True/False
Example:
Load "stdlib.ring"
if ismainsourcefile()
# code
ok
39.45 direxists() function
Check if directory exists
Syntax:
DirExists(String) ---> True/False
Example:
Load "stdlib.ring"
see "Check dir : b:ring "
puts( DirExists("b:ring") )
see "Check dir : C:ring "
Puts( DirExists("C:ring") )
39.46 makedir() function
Make Directory
39.43. sleep() function 243

Syntax:
MakeDir(String)
Example:
Load "stdlib.ring"
# Create Directory
puts("create Directory : myfolder")
makedir("myfolder")
39.47 fsize() function
The function return the ﬁle size in bytes.
Syntax:
FSize(File Handle) ---> Number (File Size in Bytes)
39.47. fsize() function 244

CHAPTER
FORTY
STDLIB CLASSES
In this chapter we are going to learn about the classes in the stdlib.ring
• StdBase Class
• String Class
• List Class
• Stack Class
• Queue Class
• HashTable Class
• Tree Class
• Math Class
• DateTime Class
• File Class
• System Class
• Debug Class
• DataType Class
• Conversion Class
• ODBC CLass
• MySQL Class
• SQLite Class
• Security Class
• Internet Class
40.1 StdBase Class
Attributes:
• vValue : Object Value
Methods:
245

Method Description/Output
Init(x) Set vValue Attribute to x value
Print() Print vValue
PrintLn() Print vValue then New Line
Size() return number represent the size of vValue
Value() return vValue
Set(x) Call Init(x)
40.2 String Class
Parent Class : StdBase Class
Methods:
Method Description/Output
Init(String|Number|List)
Lower() New String - Lower case characters
Upper() New String - Upper case characters
Left(x) New String - contains x characters from the left
Right(x) New String - contains x characters from the right
Lines() Number - Lines count
Trim() New String - Remove Spaces
Copy(x) New String - repeat string x times
strcmp(cString) Compare string with cString
tolist() List (String Lines to String Items)
toﬁle(cFileName) Write string to ﬁle
mid(nPos1,nPos2) New String - from nPos1 to nPos2
getfrom(nPos1) New String - from nPos1 to the end of the string
replace(cStr1,cStr2,lCase) New String - Replace cStr1 with cStr2 , lCase (True=Math Case)
split() List - Each Word as list item
startswith(substring) Return true if the start starts with a substring
endswith(substring) Return true if the start ends with a substring
Example:
Load "stdlib.ring"
See "Testing the String Class" + nl
oString = new string("Hello, World!")
oString.println()
oString.upper().println()
oString.lower().println()
oString.left(5).println()
oString.right(6).println()
oString = new string("Hi" + nl + "Hello" )
See oString.lines() + nl
oString = new string(" Welcome ")
oString.println()
oString.trim().println()
oString = new string("Hello! ")
oString.copy(3).println()
see oString.strcmp("Hello! ") + nl
see oString.strcmp("Hello ") + nl
see oString.strcmp("Hello!! ") + nl
oString = new string(["one","two","three"])
40.2. String Class 246

oString.print()
see oString.lines() + nl
oString = new String(1234)
oString.println()
oString = new String("one"+nl+"two"+nl+"three")
aList = oString.tolist()
see "List Items" + nl See aList
oString = new String( "Welcome to the Ring programming language")
See "the - position : " + oString.pos("the") + nl
oString = oString.getfrom(oString.pos("Ring"))
oString.println()
oString.mid(1,4).println()
oString = oString.replace("Ring","***Ring***",true)
oString.println()
oString = oString.replace("ring","***Ring***",false)
oString.println()
oString1 = new string("First")
oString2 = new string("Second")
oString = oString1 + oString2
oString.println()
oString = oString1 * 3
oString.println()
for t in ostring see t next
oString.tofile("test.txt")
oString = new string("one two three")
see nl
see ostring.split()
oString {
set("Hello") println()
set("How are you?") println()
}
Output:
Testing the String Class
Hello, World!
HELLO, WORLD!
hello, world!
Hello
World!
2
Welcome
Welcome
Hello! Hello! Hello!
0
1
-1
one
two
three
4
1234
List Items
one
two
three
the - position : 12
Ring programming language
40.2. String Class 247

The Ring programming language version 1.4 book - Part 9 of 30

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The Ring programming language version 1.4 book - Part 9 of 30