The Ring programming language version 1.9 book - Part 19 of 210

Ring Documentation, Release 1.9
2. https://github.com/ring-lang/ring/blob/master/applications/formdesigner/tests/indexstart/indexstartController.ring
10.3 Better Ring Notepad
1. Using QPlainTextEdit instead of QTextEdit
2. Displaying the line number for each line in the source code ﬁle.
Screen Shot:
3. Auto-Complete for Ring functions names, classes and words in the opened ﬁle.
10.3. Better Ring Notepad 149

4. Functions and Methods List

5. Output Window
6. Classes List

7. Change the Current Style
10.4 Ring mode for Emacs Editor
Ring 1.3 comes with Ring mode for Emacs Editor
Screen Shot:
10.4. Ring mode for Emacs Editor 152

10.5 Better StdLib
The StdLib is updated to include the next functions
• SplitMany()
• JustFilePath()
• JustFileName()
10.6 Better Loop|Exit Command
The Loop|Exit command is updated to accept Expressions after the command (not only numbers).
The syntax:
Loop|Exit [Number]
Changed to
Loop|Exit [Expression]
Example
XLoop = 2 # The outer loop
YLoop = 1 # The first inner loop
for x = 1 to 10
for y = 1 to 10
see "x=" + x + " y=" + y + nl
if x = 3 and y = 5
exit XLoop
ok
10.5. Better StdLib 153

next
next
10.7 New Functions
• PackageName() function
• Swap() function
Example:
aList = [:one,:two,:four,:three]
see aList
see copy("*",50) + nl
swap(aList,3,4)
see aList
Output
one
two
four
three
**************************************************
one
two
three
four
10.8 Return Self by Reference
In this release, using Return Self in class methods will return the object by reference.
Example:
mylist = [new mytest() {
see self
x = 20
see self
}]
see mylist
class mytest
x = 15
func init
return self # Return by reference
Output
x: 15.000000
x: 20.000000
x: 20.000000
10.7. New Functions 154

10.9 Using ‘<’ and ‘:’ operators as ‘from’ keyword
In this release of the Ring language we can use the ‘<’ and ‘:’ operators as the ‘from’ keyword
Syntax (1):
class Cat from Animal
Syntax (2):
class Cat < Animal
Syntax (3):
class Cat : Animal
10.10 Embedding Ring in Ring without sharing the State
From Ring 1.0 we already have functions for embedding Ring in the C language. Also we can execute Ring code
inside Ring programs using the eval() function. In this release we provide functions for embedding Ring in Ring
programs without sharing the state.
Advantages:
1. Quick integration for Ring programs and applications together without conﬂicts.
2. Execute and run Ring code in safe environments that we can trace.
Example:
pState = ring_state_init()
ring_state_runcode(pState,"See 'Hello, World!'+nl")
ring_state_runcode(pState,"x = 10")
pState2 = ring_state_init()
ring_state_runcode(pState2,"See 'Hello, World!'+nl")
ring_state_runcode(pState2,"x = 20")
ring_state_runcode(pState,"see x +nl")
ring_state_runcode(pState2,"see x +nl")
v1 = ring_state_findvar(pState,"x")
v2 = ring_state_findvar(pState2,"x")
see v1[3] + nl
see V2[3] + nl
ring_state_delete(pState)
ring_state_delete(pState2)
Output:
Hello, World!
Hello, World!
10
20
10
20
10.9. Using ‘<’ and ‘:’ operators as ‘from’ keyword 155

10.11 RingZip Library
Ring 1.3 comes with the RingZip library for creating, modifying and extracting *.zip files.
Example (1): Create myfile.zip contains 4 files
load "ziplib.ring"
oZip = zip_openfile("myfile.zip",'w')
zip_addfile(oZip,"test.c")
zip_addfile(oZip,"zip.c")
zip_addfile(oZip,"zip.h")
zip_addfile(oZip,"miniz.h")
zip_close(oZip)
Example (2): Extract myfile.zip to myfolder folder.
load "ziplib.ring"
zip_extract_allfiles("myfile.zip","myfolder")
Example (3): Print file names in the myfile.zip
load "ziplib.ring"
oZip = zip_openfile("myfile.zip",'r')
for x=1 to zip_filescount(oZip)
see zip_getfilenamebyindex(oZip,x) + nl
next
zip_close(oZip)
Example (4) : Using Classes instead of Functions
load "ziplib.ring"
new Zip {
SetFileName("myfile.zip")
Open("w")
AddFile("test.c")
AddFile("zip.c")
AddFile("zip.h")
AddFile("miniz.h")
Close()
}
10.12 Form Designer
Ring 1.3 comes with the Form Designer to quickly design your GUI application windows/forms and generate the Ring
source code.
It’s written in Ring (Around 8000 Lines of code) using Object-Oriented Programming and Meta-Programming.
We can run the From Designer from Ring Notepad
10.11. RingZip Library 156

Also we can run the Form Designer in another window.
10.12. Form Designer 157

CHAPTER
ELEVEN
WHAT IS NEW IN RING 1.2?
In this chapter we will learn about the changes and new features in Ring 1.2 release.
11.1 List of changes and new features
Ring 1.2 comes with many new features
• New Functions
• Better Functions
• Better Ring Notepad
• Better RingQt
• Objects Library for RingQt
• RingLibCurl
• Better Call Command
• Using NULL instead of NULLPointer()
• Display Warnings Option
• Better Quality
11.2 New Functions
• PtrCmp() Function is a new function that compare between C pointers like the GUI objects.
• PrevFileName() Function is added to return the previous active source ﬁle name.
• RingVM_CFunctionsList() Function is added to return a list of functions written in C.
• RingVM_FunctionsList() Function is added to return a list of functions written in Ring.
• RingVM_ClassesList() Function is added to return a list of Classes.
• RingVM_PackagesList() Function is added to return a list of Packages.
• RingVM_MemoryList() Function is added to return a list of Memory Scopes and Variables.
• RingVM_CallList() Function is added to return a list of the functions call list.
• RingVM_FilesList() Function is added to return a list of the Ring Files.
Example:
158

The Ring programming language version 1.9 book - Part 19 of 210

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The Ring programming language version 1.9 book - Part 19 of 210