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diff --git a/bin/ed/USD.doc/09.edtut/e5 b/bin/ed/USD.doc/09.edtut/e5 new file mode 100644 index 00000000000..0d4ab60e0b8 --- /dev/null +++ b/bin/ed/USD.doc/09.edtut/e5 @@ -0,0 +1,310 @@ +.\" $OpeBSD$ +.\" +.\" Copyright (C) Caldera International Inc. 2001-2002. +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code and documentation must retain the above +.\" copyright notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed or owned by Caldera +.\" International, Inc. +.\" 4. Neither the name of Caldera International, Inc. nor the names of other +.\" contributors may be used to endorse or promote products derived from +.\" this software without specific prior written permission. +.\" +.\" USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA +.\" INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR +.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES +.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +.\" IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE FOR ANY DIRECT, +.\" INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING +.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +.\" POSSIBILITY OF SUCH DAMAGE. +.\" +.\" @(#)e5 8.1 (Berkeley) 6/8/93 +.\" +.SH +Change and Insert \- ``c'' and ``i'' +.PP +This section discusses the +.ul +change +command +.P1 +c +.P2 +which is used to change +or replace a group of one or more lines, +and the +.ul +insert +command +.P1 +i +.P2 +which is used for inserting a group of one or more lines. +.PP +``Change'', written as +.P1 +c +.P2 +is used to replace a number of lines with different lines, which +are typed in at the terminal. +For example, +to change lines +.UL .+1 +through +.UL $ +to something else, type +.P1 +\&.+1,$c +\&. . . \fItype the lines of text you want here\fP . . . +\*. +.P2 +The lines you type between the +.UL c +command and +the +.UL . +will take the place of the original lines between +start line and end line. +This is most useful in replacing a line +or several lines which have errors in them. +.PP +If only one line is specified in the +.UL c +command, then just +that line is replaced. +(You can type in as many replacement lines as you like.) +Notice +the use of +.UL . +to end the +input \- this works just like the +.UL . +in the append command +and must appear by itself on a new line. +If no line number is given, line dot is replaced. +The value of dot is set to the last line you typed in. +.PP +``Insert'' is similar to append \- for instance +.P1 +/string/i +\&. . . \fItype the lines to be inserted here\fP . . . +\*. +.P2 +will insert the given text +.ul +before +the next line that contains ``string''. +The text between +.UL i +and +.UL . +is +.ul +inserted before +the specified line. +If no line number is specified dot is used. +Dot is set to the last line inserted. +.SH +Exercise 7: +.PP +``Change'' is rather like a combination of +delete followed by insert. +Experiment to verify that +.P1 +\fIstart, end\fP d +i +.ul +\&. . . text . . . +\*. +.P2 +is almost the same as +.P1 +\fIstart, end\fP c +.ul +\&. . . text . . . +\*. +.P2 +These are not +.ul +precisely +the same +if line +.UL $ +gets deleted. +Check this out. +What is dot? +.PP +Experiment with +.UL a +and +.UL i , +to see that they are +similar, but not the same. +You will observe that +.P1 +\fIline\(hynumber\fP a +\&. . . \fItext\fP . . . +\*. +.P2 +appends +.ul +after +the given line, while +.P1 +\fIline\(hynumber\fP i +\&. . . \fItext\fP . . . +\*. +.P2 +inserts +.ul +before +it. +Observe that if no line number is given, +.UL i +inserts before line dot, while +.UL a +appends +after line dot. +.SH +Moving text around: the ``m'' command +.PP +The move command +.UL m +is used for cutting and pasting \- +it lets you move a group of lines +from one place to another in the buffer. +Suppose you want to put the first three lines of the buffer at the end instead. +You could do it by saying: +.P1 +1,3w temp +$r temp +1,3d +.P2 +(Do you see why?) +but you can do it a lot easier with the +.UL m +command: +.P1 +1,3m$ +.P2 +The general case is +.P1 +\fIstart line, end line\fP m \fIafter this line\fP +.P2 +Notice that there is a third line to be specified \- +the place where the moved stuff gets put. +Of course the lines to be moved can be specified +by context searches; +if you had +.P1 +First paragraph +\&. . . +end of first paragraph. +Second paragraph +\&. . . +end of second paragraph. +.P2 +you could reverse the two paragraphs like this: +.P1 +/Second/,/end of second/m/First/\-1 +.P2 +Notice the +.UL \-1 : +the moved text goes +.ul +after +the line mentioned. +Dot gets set to the last line moved. +.SH +The global commands ``g'' and ``v'' +.PP +The +.ul +global +command +.UL g +is used to execute one or more +.ul +ed +commands on all those lines in the buffer +that match some specified string. +For example +.P1 +g/peling/p +.P2 +prints all lines that contain +.UL peling . +More usefully, +.P1 +g/peling/s//pelling/gp +.P2 +makes the substitution everywhere on the line, +then prints each corrected line. +Compare this to +.P1 +1,$s/peling/pelling/gp +.P2 +which only prints the last line substituted. +Another subtle difference is that +the +.UL g +command +does not give a +.UL ? +if +.UL peling +is not found +where the +.UL s +command will. +.PP +There may be several commands +(including +.UL a , +.UL c , +.UL i , +.UL r , +.UL w , +but not +.UL g ); +in that case, +every line except the last must end with a backslash +.UL \e : +.P1 +g/xxx/\*.-1s/abc/def/\e +\&\*.+2s/ghi/jkl/\e +\&\*.-2,\*.p +.P2 +makes changes in the lines before and after each line +that contains +.UL xxx , +then prints all three lines. +.PP +The +.UL v +command is the same as +.UL g , +except that the commands are executed on every line +that does +.ul +not +match the string following +.UL v : +.P1 +v/ /d +.P2 +deletes every line that does not contain a blank. |