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Ingy döt Net 2026-02-01 16:33:20 -08:00
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Task/Binary-strings/Phix/binary-strings.phix
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<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"abc"</span>
<span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">x"ef bb bf"</span> <span style="color: #000080;font-style:italic;">-- explicit binary string (the utf8 BOM)</span>
<span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
<span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">'z'</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">=</span><span style="color: #008000;">"\#EF\0z"</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"ok\n"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span>
<span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"xy"</span> <span style="color: #000080;font-style:italic;">-- s remains unaltered</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- "xyz"</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"food"</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span>
<span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">'e'</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- "feed"</span>
<span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">..</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"ast"</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- "feasted"</span>
<span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">..-</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- "fed"</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"t is empty\n"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">!=</span><span style="color: #008000;">""</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"t is not empty\n"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"be"</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">&=</span> <span style="color: #008000;">'t'</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- bet</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">'a'</span><span style="color: #0000FF;">&</span><span style="color: #000000;">t</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">t</span> <span style="color: #000080;font-style:italic;">-- abet</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #000080;font-style:italic;">-- be</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"be"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"bbo"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- abbot</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"be"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"dep"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- adept</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"be"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"dep"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- to actually modify t</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"abc"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"def"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"ghi"</span><span style="color: #0000FF;">})</span> <span style="color: #000080;font-style:italic;">-- "abc def ghi"</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"abc"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"def"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"ghi"</span><span style="color: #0000FF;">},</span><span style="color: #008000;">""</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- "abcdefghi"</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">({</span><span style="color: #008000;">"abc"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"def"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"ghi"</span><span style="color: #0000FF;">},</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- "abc\ndef\nghi"</span>
<!--
with javascript_semantics
string s = "abc"
s = x"ef bb bf" -- explicit binary string (the utf8 BOM)
s[2] = 0
s[3] = 'z'
if s="\#EF\0z" then puts(1,"ok\n") end if
string t = s
t[1..2] = "xy" -- s remains unaltered
?t -- "xyz"
t = "food" ?t
t[2..3] = 'e' ?t -- "feed"
t[3..2] = "ast" ?t -- "feasted"
t[3..-2] = "" ?t -- "fed"
if length(t)=0 then puts(1,"t is empty\n") end if
if t!="" then puts(1,"t is not empty\n") end if
t = "be"
t &= 't' ?t -- bet
t = 'a'&t ?t -- abet
?t[2..3] -- be
?substitute(t,"be","bbo") -- abbot
?substitute(t,"be","dep") -- adept
t = substitute(t,"be","dep") -- to actually modify t
?join({"abc","def","ghi"}) -- "abc def ghi"
?join({"abc","def","ghi"},"") -- "abcdefghi"
?join({"abc","def","ghi"},"\n") -- "abc\ndef\nghi"