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<h1>ruby-src:ext/pty/README.expect</h1>
&nbsp;&nbsp;README&nbsp;for&nbsp;expect<br />
&nbsp;&nbsp;&nbsp;by&nbsp;A.&nbsp;Ito,&nbsp;28&nbsp;October,&nbsp;1998<br />
<br />
&nbsp;&nbsp;Expect&nbsp;library&nbsp;adds&nbsp;IO&nbsp;class&nbsp;a&nbsp;method&nbsp;called&nbsp;expect(),&nbsp;which<br />
does&nbsp;similar&nbsp;act&nbsp;to&nbsp;tcl's&nbsp;expect&nbsp;extension.&nbsp;<br />
<br />
The&nbsp;usage&nbsp;of&nbsp;the&nbsp;method&nbsp;is:<br />
<br />
&nbsp;&nbsp;&nbsp;IO#expect(pattern,timeout=9999999)<br />
<br />
where&nbsp;`pattern'&nbsp;is&nbsp;an&nbsp;instance&nbsp;of&nbsp;String&nbsp;or&nbsp;Regexp&nbsp;and&nbsp;`timeout'<br />
is&nbsp;Fixnum,&nbsp;which&nbsp;can&nbsp;be&nbsp;omitted.&nbsp;<br />
&nbsp;&nbsp;When&nbsp;the&nbsp;method&nbsp;is&nbsp;called&nbsp;without&nbsp;block,&nbsp;it&nbsp;waits&nbsp;until&nbsp;the<br />
input&nbsp;which&nbsp;matches&nbsp;the&nbsp;pattern&nbsp;is&nbsp;obtained&nbsp;from&nbsp;the&nbsp;IO&nbsp;or&nbsp;the&nbsp;time<br />
specified&nbsp;as&nbsp;the&nbsp;timeout&nbsp;passes.&nbsp;When&nbsp;the&nbsp;pattern&nbsp;is&nbsp;obtained&nbsp;from&nbsp;the<br />
IO,&nbsp;the&nbsp;method&nbsp;returns&nbsp;an&nbsp;array.&nbsp;The&nbsp;first&nbsp;element&nbsp;of&nbsp;the&nbsp;array&nbsp;is&nbsp;the<br />
entire&nbsp;string&nbsp;obtained&nbsp;from&nbsp;the&nbsp;IO&nbsp;until&nbsp;the&nbsp;pattern&nbsp;matches.&nbsp;The<br />
following&nbsp;elements&nbsp;indicates&nbsp;the&nbsp;specific&nbsp;pattern&nbsp;which&nbsp;matched&nbsp;to&nbsp;the<br />
anchor&nbsp;in&nbsp;the&nbsp;regular&nbsp;expression.&nbsp;If&nbsp;the&nbsp;method&nbsp;ends&nbsp;because&nbsp;of<br />
timeout,&nbsp;it&nbsp;returns&nbsp;nil.&nbsp;<br />
&nbsp;&nbsp;&nbsp;When&nbsp;the&nbsp;method&nbsp;is&nbsp;called&nbsp;with&nbsp;block,&nbsp;the&nbsp;array&nbsp;is&nbsp;passed&nbsp;as<br />
the&nbsp;block&nbsp;parameter.<br />


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