QGIS/resources/function_help/longest_common_substring

<h3>longest_common_substring function</h3>
Returns the longest common substring between two strings. This substring is the longest
string that is a substring of the two input strings. Eg, the longest common substring
of "ABABC" and "BABCA" is "ABC". The substring is case sensitive.

<h4>Syntax</h4>
<pre>longest_common_substring(string1,string2)</pre>

<h4>Arguments</h4>
string1 &rarr; a string<br />
string2 &rarr; a string<br />

<h4>Example</h4>
<pre> longest_common_substring('ABABC','BABCA') &rarr; 'ABC'</pre><br />
<pre> longest_common_substring('abcDeF','abcdef') &rarr; 'abc'</pre><br />
<pre> longest_common_substring(upper('abcDeF'),upper('abcdex')) &rarr; 'ABCDE'</pre>
Add a bunch of optimised fuzzy string matching algorithms. A new QgsStringUtils class has been added containing some common fuzzy matching algorithms, including Levenshtein edit distance and Soundex. These can be used for finding "similar" strings in a table. Expression functions for these algorithms have also been added to a new "Fuzzy Matching" group. 2015-06-27 11:27:59 +10:00			`<h3>longest_common_substring function</h3>`
			`Returns the longest common substring between two strings. This substring is the longest`
			`string that is a substring of the two input strings. Eg, the longest common substring`
			`of "ABABC" and "BABCA" is "ABC". The substring is case sensitive.`

			`<h4>Syntax</h4>`
			`<pre>longest_common_substring(string1,string2)</pre>`

			`<h4>Arguments</h4>`
			`string1 → a string<br />`
			`string2 → a string<br />`

			`<h4>Example</h4>`
			`<pre> longest_common_substring('ABABC','BABCA') → 'ABC'</pre><br />`
			`<pre> longest_common_substring('abcDeF','abcdef') → 'abc'</pre><br />`
			`<pre> longest_common_substring(upper('abcDeF'),upper('abcdex')) → 'ABCDE'</pre>`