Binary strings: Difference between revisions
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→{{header|FutureBasic}}
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Pascal strings are an array of bytes with the string length stored in byte 0.
CFStrings are immutable objects that encode a Unicode-compliant text string, represented as a sequence of UTF–16 code units. All lengths, character indexes, and ranges are expressed in terms of 16-bit platform-endian values, with index values starting at 0. The private contents of the string object are accessed via a pointer to its address. CFStrings are technically unlimited in length. While basic CFString manipulation is shown below, FB's CocoaUI offers a host of sophisticated accessor functions. Immutable CFStrings have a mutable sister, CFMutableStrings.
<syntaxhighlight lang="futurebasic"▼
▲<syntaxhighlight lang="futurebasic">
// Pascal Strings (limited to 255 characters)
print "----------------------"
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a = "Hello, world!"
for i = 1 to len$(a)
if ( mid$( a, i, 5 ) == "world" )
a = left$( a, i -1 ) + "universe" + mid$( a, i + 5 )
end if
next
print a
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print : print
HandleEvents
</syntaxhighlight>
{{output}}
<pre>
----------------------▼
Pascal String Examples
----------------------▼
Length of "Hello, world!" is 13 characters.▼
String is empty▼
Hello, universe!▼
See you later.▼
</pre>
'''CFSString example:'''
<syntaxhighlight lang="futurebasic">
print @"----------------------"
print @" CFString Examples"
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// Extract a substring
b = mid( c, 1, 5 )
// Substitute string "world" with "universe"
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{{output}}
<pre>
▲----------------------
▲Pascal String Examples
▲----------------------
▲Length of "Hello, world!" is 13 characters.
▲String is empty
▲Hello, universe!
▲See you later.
----------------------
CFString Examples
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