dedupe

Description

Remove duplicate items from an array of content recommendations, so that the same product or article is not displayed more than once.

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array dedupe( array input [, string field] )

Based on the specified field–the name of any content attribute supported by the Content API such as a key (e.g. url) or var–deduplicate the array of content items, returning a new content array in which the value for each field exists only once. The default field (when the field parameter is not specified) is url — the URL of the content items. Note: If you want to deduplicate a content feed while maintaining the locations of content items that are pinned using Recommendations, use filter_content() instead.

Examples

Deduplicate the content array based on matches of the url field:
{content = dedupe(content)} or {content = dedupe(content, "url")}
Either of the above would transform the following content array to remove duplicate URLs:

content Before

{
    "url" : "http://example.com/1",
    <additional fields>
},
{
    "url" : "http://example.com/2",
    <additional fields>
},
{
    "url" : "http://example.com/2",
    <additional fields>
},
{
    "url" : "http://example.com/3",
    <additional fields>
}

content After

{
    "url" : "http://example.com/1",
    <additional fields>
},
{
    "url" : "http://example.com/2",
    <additional fields>
},
{
    "url" : "http://example.com/3",
    <additional fields>
}

Deduplicate the content array based on matches of the sku field:
{content = dedupe(content, "sku")}
Deduplicate the content array based on matches of the title field:
{content = dedupe(content, "title")}
Deduplicate the content array based on matches of a content var named item_id:
{content = dedupe(content, "vars.item_id")}
Deduplicate the content array based on matches of a content var named item.id:
{content = dedupe(content, "vars.item.id")}