RosettaCodeData/Task/Determine-if-a-string-is-collapsible/FutureBasic/determine-if-a-string-is-collapsible.basic
2023-07-01 13:44:08 -04:00

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local fn CollapseString( inString as CFStringRef ) as CFStringRef
CFMutableStringRef outString = fn MutableStringWithCapacity(0)
long index
unichar prevChar = 0, currChar
for index = 0 to len(inString) - 1
currChar = fn StringCharacterAtIndex( inString, index )
if ( currChar != prevChar ) then MutableStringAppendFormat( outString, @"%C", currChar )
prevChar = currChar
next
end fn = outString
window 1, @"Collapse String", (0,0,600,300)
CFStringRef string, collapsedString
string = @""
collapsedString = fn CollapseString( string )
printf @"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
string = @"\"If I were two-faced, would I be wearing this one?\" --- Abraham Lincoln "
collapsedString = fn CollapseString( string )
printf@"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
string = @"..1111111111111111111111111111111111111111111111111111111111111117777888"
collapsedString = fn CollapseString( string )
printf@"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
string = @"I never give 'em hell, I just tell the truth, and they think it's hell. "
collapsedString = fn CollapseString( string )
printf@"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
string = @" --- Harry S Truman "
collapsedString = fn CollapseString( string )
printf@"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
string = @"\"AAAAAll that glitters is not goldDDDD.\" - William Shakespeare"
collapsedString = fn CollapseString( string )
printf@"<<<%@>>> %ld\n<<<%@>>> %ld\n",string,len(string),collapsedString,len(collapsedString)
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