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earliest match wins
EBCDIC
ECMAScript (.NET) 2nd 3rd 4th 5th
ed
efficiency (see also optimization)
        and backtracking
        correctness
        Perl
        Perl-specific issues
        PHP
        regex objects
        unlimited lookbehind
egrep
        after-match data
        backreference support
        case-insensitive match
        doubled -word solution
        example use
        flavor overview
        flavor summary
        history
        introduced
        metacharacter discussion
        regex implementation
        version covered
electric engine analogy
Emacs
        after-match data
        control characters
        flavor overview
        re-search-forward
        search
        strings as regexes
        syntax class
        version covered
        word boundaries
email address example 2nd
        .NET
        Java
email of author
embedded code
        local
        my
        regex construct 2nd
        sanitizing
embedded string check optimization 2nd
Embodiments of Mind
Empty
empty-element tag
\p{Enclosing_Mark} 2nd 3rd
encoding (see also Unicode)
        ASCII 2nd 3rd 4th
        introduced
        issues overview
        Latin-1 2nd 3rd 4th 5th
        UCS-2
        UCS-4
        UTF-16
        UTF-8 2nd 3rd
END block
end method
end-of-string anchor optimization
engine
        analogy
        hybrid 2nd 3rd
        implementation ease
        introduced
        testing type
                with neverending match
        type comparison 2nd
English module
English vs. regex
enhanced line-anchor mode
        introduced
enhanced line-anchor mode)
        caret
        dollar
        end-of-line optimization
        exposing
        line 2nd 3rd
        overview
ERE
ereg suite
errata
Escape
escape
        introduced
        term defined
@ escaping
essence
        atomic grouping
        greediness , laziness , and backtracking
eval
example
        atomic grouping 2nd 3rd 4th 5th 6th 7th
        commafying a number
                introduced
                without lookbehind
       CSV parsing
                .NET
                Java 2nd
                Perl
                PHP
                unrolling
                VB.NET
        dollar value 2nd 3rd 4th 5th
       double-quoted string
                allowing escaped quotes
                egrep
                final regex
                makudonarudo 2nd 3rd 4th
                sobering example
                unrolled 2nd
        double-word finder
                egrep
                Emacs
                Java
                Perl 2nd
        email address 2nd
                .NET
                Java
        filename 2nd
        five modifiers
        floating-point number
        form letter
        gr[ea]y
        hostname 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th
                egrep
                in URL
                Java
                plucking from text 2nd
                validating
                VB.NET
        HREF
        HTML 2nd 3rd 4th 5th 6th
                <HR>
                conversion from text
                cooking 2nd
                encoding
                link
                optional
                paired tags
                parsing 2nd 3rd 4th
                tag 2nd 3rd 4th 5th 6th
                URL 2nd 3rd 4th 5th
                URL-encoding
        HTTP response
        image tags
        IP 2nd 3rd 4th 5th 6th
        Jeffs
        lookahead
        mail processing
        makudonarudo 2nd 3rd 4th
        pathname
        population
        possessive quantifiers 2nd
        postal code
        regex overloading
        stock pricing 2nd
                with alternation
                with atomic grouping
                with possessive quantifier
       temperature conversion
                .NET
                Java
                Perl 2nd
                PHP
        text-to-HTML
        this that 2nd 3rd 4th 5th 6th 7th 8th
        unrolling the loop 2nd
        URL 2nd 3rd 4th 5th 6th 7th 8th
                egrep
                Java
                plucking
        username 2nd 3rd
                in URL
                plucking from text
        variable names
        XML
        ZIP code
exception
        PatternSyntaxException
        IllegalArgumentException 2nd
        IllegalStateException
        IndexOutOfBoundsException 2nd
        IOException
        PatternSyntaxException
Explicit (Option)
ExplicitCapture (.NET) 2nd 3rd
exponential match 2nd 3rd
        avoiding
        discovery
        explanation
        non-determinism
        short-circuiting
        solving with atomic grouping
        solving with possessive quantifiers
expose literal text
expression
        context
        contorting
        Extended Regular Expressions