The Ring programming language version 1.10 book - Part 19 of 212

1. Ring Documentation, Release 1.10
10.5 RingREPL
In the application folder, You will find RingREPL (Read-Eval-Print-Loop)
Also you can run it from Ring Notepad (Menubar - Tools)
Screen Shot:
10.6 Convert between Numbers and Bytes
Ring 1.4 comes with the next functions to convert between Numbers and Bytes.
• Int2Bytes()
• Float2Bytes()
• Double2Bytes()
• Bytes2Int()
• Bytes2Float()
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2. Ring Documentation, Release 1.10
• Bytes2Double()
Example:
see "Test Int2Bytes() and Bytes2Int() - Value : 77" + nl
r = Int2Bytes(77)
see "Int Size : " + len(r) + nl
see r + nl
see Bytes2Int(r) + nl
see "Test Float2Bytes() and Bytes2Float() - Value 77.12" + nl
r = Float2Bytes(77.12)
see "Float Size : " + len(r) + nl
see r + nl
see Bytes2Float(r) + nl
see "Test Double2Bytes() and Bytes2Double() - Value 9999977.12345" + nl
r = Double2Bytes(9999977.12345)
see "Double Size : " + len(r) + nl
see r + nl
decimals(5)
see Bytes2Double(r) + nl
10.7 Better StdLib
The StdLib is updated to include the next functions
• FSize()
The print() function is updated to accept local variables.
load "stdlib.ring"
func main
print("Enter your name : ") ;
Name = getString() ;
print( "Hello : #{Name} ") ;
return ;
10.8 Better WebLib
The web library is updated
• Provide better error message
1. Error (WebLib-1) : REQUEST_METHOD is empty ! - Run this script from the browser
2. Error (DataLib-1) : Can’t connect to the database server!
• Better Template() function - can accept NULL instead of object as the second paramter.
html(template("main.rhtml",NULL))
• The Form Class is updated to support the “target” attribute.
BootStrapWebPage()
{
Title = "The Ring Programming Language"
html(template("main.rhtml",NULL))
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3. Ring Documentation, Release 1.10
div {
classname = :container
div
{
id = "div3"
color = "black"
backgroundcolor = "white"
width = "100%"
form
{
method = "POST"
Action = website
Target = "codeoutput"
input { type="hidden" name="page" value=1 }
Table
{
style = stylewidth("100%") +
stylegradient(3)
TR
{
TD { align="center"
WIDTH="10%"
text("Code :")
}
TD {
html(`
<textarea name = "cCode"
rows="5"
style="width : 100%; ">
See "Hello, World!" + nl
</textarea>`)
}
}
}
Input { type = "submit"
classname="btn btn-primary btn-block"
value = "Execute" }
Table
{
style = stylewidth("100%") +
stylegradient(34)
TR
{
TD { align="center"
WIDTH="10%"
text("Output :")
}
TD {
html(`
<iframe name="codeoutput"
width="100%"
style="background-color:white;">
</iframe>`)
}
}
}
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4. Ring Documentation, Release 1.10
}
}
}
html(template("footer.rhtml",NULL))
}
10.9 Better RingQt
The next functions are added to RingQt
• SetDialogIcon(cIconFile)
• MsgInfo(cTitle,cMessage)
• ConfirmMsg(cTitle,cMessage)
• InputBox(cTitle,cMessage)
• InputBoxInt(cTitle,cMessage)
• InputBoxNum(cTitle,cMessage)
• InputBoxPass(cTitle,cMessage)
The next classes are added to RingQt
• QToolButton
• QSerialPort
• QSerialPortInfo
10.10 Qt Class Convertor
Ring 1.4 comes with a simple tool that help in porting Qt classes to RingQt.
You will find it in ring/samples/tools/QtClassConverter
Online : https://github.com/ring-lang/ring/tree/master/samples/tools/QtClassConverter
Screen Shot:
10.9. Better RingQt 151

5. Ring Documentation, Release 1.10
10.11 What is new in Ring 1.4.1?
Ring 1.4.1 comes with the next changes
• Better Scripts for Building from Source Code
• Better Colors for the Modern Style in Ring Notepad
• Better StdLib
• Better RingQt
• New Sample : Sixteen Puzzle
The scripts are updated for building from source code.
Tested using Windows, Ubuntu Linux, Linux Mint and MacOS X.
Screen Shot:
10.11. What is new in Ring 1.4.1? 152

6. Ring Documentation, Release 1.10
In Ring Notepad - the (Modern) Style colors are updated
Screen Shot:
The StdLib is updated to include the next functions
• TrimLeft()
• TrimRight()
• TrimAll()
• EpochTime()
10.11. What is new in Ring 1.4.1? 153

7. Ring Documentation, Release 1.10
The next functions are updated to display the dialogs on the top of other windows.
• SetDialogIcon(cIconFile)
• MsgInfo(cTitle,cMessage)
• ConfirmMsg(cTitle,cMessage)
• InputBox(cTitle,cMessage)
• InputBoxInt(cTitle,cMessage)
• InputBoxNum(cTitle,cMessage)
• InputBoxPass(cTitle,cMessage)
The Sixteen Puzzle is added to the Applications folder.
Screen Shot:
10.11. What is new in Ring 1.4.1? 154

8. Ring Documentation, Release 1.10
10.11. What is new in Ring 1.4.1? 155

9. CHAPTER
ELEVEN
WHAT IS NEW IN RING 1.3?
In this chapter we will learn about the changes and new features in Ring 1.3 release.
11.1 List of changes and new features
Ring 1.3 comes with many new features
• Better RingQt
• Better Ring Notepad
• Ring mode for Emacs Editor
• Better StdLib
• Better Loop/Exit Command
• New Functions
• Return Self by Reference
• Using ‘<’ and ‘:’ operators as ‘from’ keyword
• Embedding Ring in Ring without sharing the State
• RingZip Library
• Form Designer
11.2 Better RingQt
(1) Another version of QPixMap class is added (QPixMap2) which takes (int width,int height) during object init.
Example:
Load "guilib.ring"
New qapp
{
win1 = new qwidget()
{
setwindowtitle("Drawing using QPixMap")
setgeometry(100,100,500,500)
label1 = new qlabel(win1)
{
setgeometry(10,10,400,400)
settext("")
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10. Ring Documentation, Release 1.10
}
imageStock = new qlabel(win1)
{
image = new qPixMap2(200,200)
color = new qcolor() {
setrgb(255,255,255,255)
}
pen = new qpen() {
setcolor(color)
setwidth(10)
}
new qpainter() {
begin(image)
setpen(pen)
drawline(0,0,200,200)
drawline(200,0,0,200)
endpaint()
}
setpixmap(image)
}
show()
}
exec()
}
Screen Shot:
11.2. Better RingQt 157