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Emacs provides commands for searching for occurrences of a particular
string. The search is incremental i.e. it begins even before you
complete typing the whole string. All searches in Emacs ignore the case
of the text they are searching, i.e. if you are searching for "String",
then "string" will also be one of the selections. If you want a case
sensitive search select the Case Sensitive Search from the
Option menu. You can also set the variable
nil for making searches case-sensitive. For information on setting
variables, See section 8.1 Other Customizations. The two commands for searching for
strings in XEmacs are:
If you type "myname" as the string to be searched, then Emacs will start searching for "m", "my", "myn", etc as you go on typing the whole string in the forward direction. The cursor will be on the matching string which has been found so far. If you find the correct match just hit RET or type C-f or C-b to set the cursor's position. If you find a matching string "myname" but you were looking for a different occurrence of it, use C-s again. If the search is unable to find the string, it will give you an error message.
After you start typing the string name, it will search for the string in the same fashion as it does for C-s except that it will search in the backward direction. If it cannot find the string name, it will give you an error message.
If you make a mistake while typing the string names when you use the above commands, you can use the DEL key to erase characters. Each DEL will erase the last character. At any time if you want to quit the search, just type C-g.
To do a non-incremental search i.e. to start the search only after you have typed the whole string you can use the following commands:
For information on how Emacs searches for words and regular expressions, See section `Search' in XEmacs User's Manual.
To replace all occurrences of a string in Emacs, you can use the following command:
After you type M-x replace-string, you will be prompted for a string name to replace:
After you type in a string name, for example "FOO" and press RET, you will see another prompt:
Replace string FOO with:
Now type the string which you want to replace "FOO" with and press RET. After all the occurrences are replaced you will see the message "Done" in the echo area. If you want only some occurrences of the string to be replaced, use M-x query-replace RET <string> RET <newstring> RET. For more information, See section `Query Replace' in XEmacs User's Manual.
XEmacs also provides a utility for checking spellings. Use M-x ispell-buffer to check for spellings in the whole buffer. You can also check the spelling of a word or a region. You can use menus to check for spellings:
Evaluate the expression
(load "big-menubar"). To evaluate this
expression you need to hit the META or the ESC key twice and
type in the expression in the echo area before hitting RET. You
will get an extensive menubar. Select the Spell Check menu item from
the Utilities menu for checking spellings.
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