1st JavaScript Editor Online Help

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Dialogs - Find & Replace

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To get this dialog just press Ctrl+F or click "Find And Replace" from "Edit" menu or from Main toolbar.
Here you can define what word to find and by which word it should be replaced. Following options are available.

Find What: Enter text that you want to search for. First JavaScript Editor supports regular expression and wildcards. You can press down-arrow button for regular expression templates. See Regular Expression and Wildcards for more detail.

Replace With: Enter text that you want to replace the found text with. First JavaScript Editor supports regular expression. You can press down-arrow button for regular expression templates. See Regular Expression for more detail.

Find: Find specified text with current options.

Replace: Replace found text with specified text.

Replace All: Perform find and replace for the current document, all open documents or current selection

Mark All: Press this button to find all occurrences of the specified text in the current document and set markers to them.

Match Case: Check this option if you want case-sensitive searching.

Match Whole Word: Check this option if you want to search whole word only and ignore text which is a substring of another word.

Use Regular Expression: Check this option if you want to search regular expression. Regular expression allows more sophisticated and powerful search. See Regular Expression for more detail about regular expression syntax.

Use Wildcards: Check this option if you want to search wildcards. Wildcards allows more sophisticated and powerful search. See Wildcards for more detail.

Prompt on replace: Check this option if you want to receive a prompt before replacing.

Search Up: Check this option if you want to search upward from current position.

Wrap at the end of file: When end of file is reached, resume search from the start.

Close After Finding: Check this option if you want this dialog to be closed after finding. Note, if you will want to continue the last find or replace action, just press F3 or click "Find Next" from "Edit" menu.

More/Less: Press this button to show the multi-line input field. You can enter multi-line text in this input box.

Save Query: Click this button to save current query for further using.

Load Query: Click this button to open a before saved query.

Using Regular Expressions.

Regular expression is a search string that contains normal text plus special characters which indicate extended searching options. Regular expression allows more sophisticated search and replace.
Below is the description of regular expressions implemented in 1st JavaScript Editor.


Regular Expressions are a widely-used method of specifying patterns of text to search for. Special metacharacters allow you to specify, for instance, that a particular string you are looking for occurs at the beginning or end of a line, or contains n recurrences of a certain character.
Regular expressions look ugly for novices, but really they are very simple, handily and powerful tool.
Let's start our learning trip!

Simple matches:

Any single character matches itself, unless it is a metacharacter with a special meaning described below.
A series of characters matches that series of characters in the target string, so the pattern "bluh" would match "bluh'' in the target string. Quite simple, eh?
You can cause characters that normally function as metacharacters or escape sequences to be interpreted literally by 'escaping' them by preceding them with a backslash "\", for instance: metacharacter "^" match beginning of string, but "\^" match character "^", "\\" match "\" and so on.


foobar matchs string 'foobar'
\^FooBarPtr matchs '^FooBarPtr'

Escape sequences:

Characters may be specified using a escape sequences syntax much like that used in C and Perl: "\n'' matches a newline, "\t'' a tab, etc. More generally, \xnn, where nn is a string of hexadecimal digits, matches the character whose ASCII value is nn. If You need wide (Unicode) character code, You can use '\x{nnnn}', where 'nnnn' - one or more hexadecimal digits.

\xnn char with hex code nn
\x{nnnn} char with hex code nnnn (one byte for plain text and two bytes for Unicode)
\t tab (HT/TAB), same as \x09
\n newline (NL), same as \x0a
\r car.return (CR), same as \x0d
\f form feed (FF), same as \x0c
\a alarm (bell) (BEL), same as \x07
\e escape (ESC), same as \x1b


foo\x20bar matchs 'foo bar' (note space in the middle)
\tfoobar matchs 'foobar' predefined by tab

Character classes:

You can specify a character class, by enclosing a list of characters in [], which will match any one character from the list.
If the first character after the "['' is "^'', the class matches any character not in the list.


foob[aeiou]r finds strings 'foobar', 'foober' etc. but not 'foobbr', 'foobcr' etc.
foob[^aeiou]r find strings 'foobbr', 'foobcr' etc. but not 'foobar', 'foober' etc.

Within a list, the "-'' character is used to specify a range, so that a-z represents all characters between "a'' and "z'', inclusive.
If you want "-'' itself to be a member of a class, put it at the start or end of the list, or escape it with a backslash. If you want ']' you may place it at the start of list or escape it with a backslash.


[-az] matchs 'a', 'z' and '-'
[ az- ] matchs 'a', 'z' and '-'
[a\-z] matchs 'a', 'z' and '-'
[a-z] matchs all twenty six small characters from 'a' to 'z'
[\n-\x0D] matchs any of #10,#11,#12,#13.
[\d-t] matchs any digit, '-' or 't'.
[]-a] matchs any char from ']'..'a'.


Metacharacters are special characters which are the essence of Regular Expressions. There are different types of metacharacters, described below.
Metacharacters - line separators:

^ start of line
$ end of line
\A start of text
\Z end of text
. any character in line


^foobar matchs string 'foobar' only if it's at the beginning of line
foobar$ matchs string 'foobar' only if it's at the end of line
^foobar$ matchs string 'foobar' only if it's the only string in line
foob.r matchs strings like 'foobar', 'foobbr', 'foob1r' and so on

The "^" metacharacter by default is only guaranteed to match at the beginning of the input string/text, the "$" metacharacter only at the end. Embedded line separators will not be matched by "^'' or "$''.
You may, however, wish to treat a string as a multi-line buffer, such that the "^'' will match after any line separator within the string, and "$'' will match before any line separator.

The \A and \Z are just like "^'' and "$''.
The ".'' metacharacter matches any character.
"^" is at the beginning of a input string.
"$" is at the end of a input string.
"." matchs any character.

Note that "^.*$" (an empty line pattern) doesnot match the empty string within the sequence \x0D\x0A, but matchs the empty string within the sequence \x0A\x0D.

Metacharacters - predefined classes:

\w an alphanumeric character (including "_")
\W a nonalphanumeric
\d a numeric character
\D a non-numeric
\s any space (same as [ \t\n\r\f])
\S a non space

You may use \w, \d and \s within custom character classes.


foob\dr matchs strings like 'foob1r', ''foob6r' and so on but not 'foobar', 'foobbr' and so on
foob[\w\s]r matchs strings like 'foobar', 'foob r', 'foobbr' and so on but not 'foob1r', 'foob=r' and so on.

Metacharacters - word boundaries:


\b Match a word boundary
\B Match a non-(word boundary)

A word boundary (\b) is a spot between two characters that has a \w on one side of it and a \W on the other side of it (in either order), counting the imaginary characters off the beginning and end of the string as matching a \W.

Metacharacters - iterators:

Any item of a regular expression may be followed by another type of metacharacters - iterators. Using this metacharacters you can specify number of occurrences of previous character, metacharacter or subexpression.

* zero or more ("greedy"), similar to {0,}
+ one or more ("greedy"), similar to {1,}
? zero or one ("greedy"), similar to {0,1}
{n} exactly n times ("greedy")
{n,} at least n times ("greedy")
{n,m} at least n but not more than m times ("greedy")
*? zero or more ("non-greedy"), similar to {0,}?
+? one or more ("non-greedy"), similar to {1,}?
?? zero or one ("non-greedy"), similar to {0,1}?
{n}? exactly n times ("non-greedy")
{n,}? at least n times ("non-greedy")
{n,m}? at least n but not more than m times ("non-greedy")

So, digits in curly brackets of the form {n,m}, specify the minimum number of times to match the item n and the maximum m. The form {n} is equivalent to {n,n} and matches exactly n times. The form {n,} matches n or more times. There is no limit to the size of n or m, but large numbers will chew up more memory and slow down r.e. execution.
If a curly bracket occurs in any other context, it is treated as a regular character.


foob.*r matchs strings like 'foobar', 'foobalkjdflkj9r' and 'foobr'
foob.+r matchs strings like 'foobar', 'foobalkjdflkj9r' but not 'foobr'
foob.?r matchs strings like 'foobar', 'foobbr' and 'foobr' but not 'foobalkj9r'
fooba{2}r matchs the string 'foobaar'
fooba{2,}r matchs strings like 'foobaar', 'foobaaar', 'foobaaaar' etc.
fooba{2,3}r matchs strings like 'foobaar', or 'foobaaar' but not 'foobaaaar'

A little explanation about "greediness". "Greedy" takes as many as possible, "non-greedy" takes as few as possible. For example, 'b+' and 'b*' applied to string 'abbbbc' return 'bbbb', 'b+?' returns 'b', 'b*?' returns empty string, 'b{2,3}?' returns 'bb', 'b{2,3}' returns 'bbb'.

Metacharacters - alternatives:

You can specify a series of alternatives for a pattern using "|'' to separate them, so that fee|fie|foe will match any of "fee'', "fie'', or "foe'' in the target string (as would f(e|i|o)e). The first alternative includes everything from the last pattern delimiter ("('', "['', or the beginning of the pattern) up to the first "|'', and the last alternative contains everything from the last "|'' to the next pattern delimiter. For this reason, it's common practice to include alternatives in parentheses, to minimize confusion about where they start and end.
Alternatives are tried from left to right, so the first alternative found for which the entire expression matches, is the one that is chosen. This means that alternatives are not necessarily greedy. For example: when matching foo|foot against "barefoot'', only the "foo'' part will match, as that is the first alternative tried, and it successfully matches the target string. (This might not seem important, but it is important when you are capturing matched text using parentheses.)
Also remember that "|'' is interpreted as a literal within square brackets, so if you write [fee|fie|foe] you're really only matching [feio|].


foo(bar|foo) matchs strings 'foobar' or 'foofoo'.

Metacharacters - subexpressions:


The bracketing construct ( ... ) may also be used for define.
Subexpressions are numbered based on the left to right order of their opening parenthesis.
First subexpression has number '1' (whole match has number '0' - You can substitute it as '$0' or '$&').


(foobar){8,10} matchs strings which contain 8, 9 or 10 instances of the 'foobar'
foob([0-9]|a+)r matchs 'foob0r', 'foob1r' , 'foobar', 'foobaar', 'foobaar' etc.

Metacharacters - backreferences:

Metacharacters \1 through \9 are interpreted as backreferences. \<n> matches previously matched subexpression #<n>.


(.)\1+ matchs 'aaaa' and 'cc'.

(.+)\1+ also match 'abab' and '123123'

(['"]?)(\d+)\1 matchs '"13" (in double quotes), or '4' (in single quotes) or 77 (without quotes) etc

Using Wildcards.

‘?’ = match any single character
‘#’ = match any numeric character (0..9)
‘@’ = match any alpha character (A..Z, a..z)
‘$’ = match any alphanumeric character
‘~’ = match any non-alphanumeric, non-space character

See also other dialogs: Preferences Send by Email Insert Image Insert Table HyperLink Email Link Named Anchor Form Elements Insert special character Formatting JavaScript Customize date/time format Call JavaScript Function

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