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.\" ========================================================================
.\"
.IX Title "Mojo::JSON::Pointer 3"
.TH Mojo::JSON::Pointer 3 "2023-03-08" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Mojo::JSON::Pointer \- JSON Pointers
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::JSON::Pointer;
\&
\&  my $pointer = Mojo::JSON::Pointer\->new({foo => [23, \*(Aqbar\*(Aq]});
\&  say $pointer\->get(\*(Aq/foo/1\*(Aq);
\&  say \*(AqContains "/foo".\*(Aq if $pointer\->contains(\*(Aq/foo\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::JSON::Pointer is an implementation of \s-1RFC 6901\s0 <https://tools.ietf.org/html/rfc6901>.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojo::JSON::Pointer implements the following attributes.
.SS "data"
.IX Subsection "data"
.Vb 2
\&  my $data = $pointer\->data;
\&  $pointer = $pointer\->data({foo => \*(Aqbar\*(Aq});
.Ve
.PP
Data structure to be processed.
.SH "METHODS"
.IX Header "METHODS"
Mojo::JSON::Pointer inherits all methods from Mojo::Base and implements the following new ones.
.SS "contains"
.IX Subsection "contains"
.Vb 1
\&  my $bool = $pointer\->contains(\*(Aq/foo/1\*(Aq);
.Ve
.PP
Check if \*(L"data\*(R" contains a value that can be identified with the given \s-1JSON\s0 Pointer.
.PP
.Vb 5
\&  # True
\&  Mojo::JSON::Pointer\->new(\*(Aqjust a string\*(Aq)\->contains(\*(Aq\*(Aq);
\&  Mojo::JSON::Pointer\->new({\*(Aq♥\*(Aq => \*(Aqmojolicious\*(Aq})\->contains(\*(Aq/♥\*(Aq);
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5]})\->contains(\*(Aq/foo\*(Aq);
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5]})\->contains(\*(Aq/baz/1\*(Aq);
\&
\&  # False
\&  Mojo::JSON::Pointer\->new({\*(Aq♥\*(Aq => \*(Aqmojolicious\*(Aq})\->contains(\*(Aq/☃\*(Aq);
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5]})\->contains(\*(Aq/bar\*(Aq);
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5]})\->contains(\*(Aq/baz/9\*(Aq);
.Ve
.SS "get"
.IX Subsection "get"
.Vb 1
\&  my $value = $pointer\->get(\*(Aq/foo/bar\*(Aq);
.Ve
.PP
Extract value from \*(L"data\*(R" identified by the given \s-1JSON\s0 Pointer.
.PP
.Vb 2
\&  # "just a string"
\&  Mojo::JSON::Pointer\->new(\*(Aqjust a string\*(Aq)\->get(\*(Aq\*(Aq);
\&
\&  # "mojolicious"
\&  Mojo::JSON::Pointer\->new({\*(Aq♥\*(Aq => \*(Aqmojolicious\*(Aq})\->get(\*(Aq/♥\*(Aq);
\&
\&  # "bar"
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5, 6]})\->get(\*(Aq/foo\*(Aq);
\&
\&  # "4"
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5, 6]})\->get(\*(Aq/baz/0\*(Aq);
\&
\&  # "6"
\&  Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq, baz => [4, 5, 6]})\->get(\*(Aq/baz/2\*(Aq);
.Ve
.SS "new"
.IX Subsection "new"
.Vb 2
\&  my $pointer = Mojo::JSON::Pointer\->new;
\&  my $pointer = Mojo::JSON::Pointer\->new({foo => \*(Aqbar\*(Aq});
.Ve
.PP
Build new Mojo::JSON::Pointer object.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.