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$ fc -s 1029 lpr letter.adams01 in Objective-C Incoporate Code 128 in Objective-C $ fc -s 1029 lpr letter.adams01




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$ fc -s 1029 lpr letter.adams01 use iphone barcode standards 128 creation topaint barcode 128a with objective-c ISO QR Code standard The next example reexecutes t iPhone ANSI/AIM Code 128 he previous command:. $ fc -s History 313 When you reexecute a command, you can tell fc to substitute one string for another. The next example substitutes the string john for the string adams in event 1029 and executes the modified event:. $ fc -s adams=john 1029 lpr letter.john01 Using an Exclamation Point (!) to Reference Events The C Shell history mechanism barcode code 128 for Objective-C uses an exclamation point to reference events. This technique, which is available under bash and tcsh, is frequently more cumbersome to use than fc but nevertheless has some useful features. For example, the !! command reexecutes the previous event, and the shell replaces the !$ token with the last word on the previous command line.

You can reference an event by using its absolute event number, its relative event number, or the text it contains. All references to events, called event designators, begin with an exclamation point (!). One or more characters follow the exclamation point to specify an event.

You can put history events anywhere on a command line. To escape an exclamation point so that the shell interprets it literally instead of as the start of a history event, precede the exclamation point with a backslash (\) or enclose it within single quotation marks..

Event Designators An event designator specifies Code128 for Objective-C a command in the history list. See Table 8-8 on the next page for a list of event designators..

!! reexecutes the previous event You can reexecute the previou iPhone code 128c s event by giving a !! command. In the following example, event 45 reexecutes event 44:. 44 $ ls -l text -rw-rw-r-1 ma x group 45 Apr 30 14:53 text 45 $ !! ls -l text -rw-rw-r-1 max group 45 Apr 30 14:53 text. The !! command works whether barcode 128a for Objective-C or not your prompt displays an event number. As this example shows, when you use the history mechanism to reexecute an event, the shell displays the command it is reexecuting..

!n event number A number following an exclama iPhone code128b tion point refers to an event. If that event is in the history list, the shell executes it. Otherwise, the shell displays an error message.

A negative number following an exclamation point references an event relative to the current event. For example, the command ! 3 refers to the third preceding event. After you issue a command, the relative event number of a given event changes (event 3 becomes event 4).

Both of the following commands reexecute event 44:. 51 $ !44 ls -l text -rw-rw-r- 52 $ !-8 ls -l text -rw-rw-r--. 1 max group 45 Apr 30 14:53 text 1 max group 45 Apr 30 14:53 text 314 8 The Bourne Again Shell !string event text When a string of text follows Code 128 for Objective-C an exclamation point, the shell searches for and executes the most recent event that began with that string. If you enclose the string within question marks, the shell executes the most recent event that contained that string. The final question mark is optional if a RETURN would immediately follow it.

. 68 $ history 10 59 ls -l text * 60 tail text5 61 cat text1 text5 > letter 62 vim letter 63 cat letter 64 cat memo 65 lpr memo 66 pine zach 67 ls -l 68 history 69 $ !l ls -l ...

70 $ !lpr lpr memo 71 $ ! letter cat letter ...

. Table 8-8. Designator ! !! !n ! n !string ! string[ iPhone barcode code 128 ] !# !{event }. Event designators Meaning Starts a history event unless barcode 128a for Objective-C followed immediately by SPACE, NEWLINE, =, or (. The previous command. Command number n in the history list.

The nth preceding command. The most recent command line that started with string. The most recent command that contained string.

The last is optional. The current command (as you have it typed so far). The event is an event designator.

The braces isolate event from the surrounding text. For example, !{ 3}3 is the third most recently executed command followed by a 3..

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