{"id":15197,"date":"2019-10-02T04:34:59","date_gmt":"2019-10-01T21:34:59","guid":{"rendered":"https:\/\/huongdanjava.com\/?p=15197"},"modified":"2019-10-02T04:35:26","modified_gmt":"2019-10-01T21:35:26","slug":"using-pluck-function-in-dataweave-2","status":"publish","type":"post","link":"https:\/\/huongdanjava.com\/using-pluck-function-in-dataweave-2.html","title":{"rendered":"Using pluck() function in DataWeave 2"},"content":{"rendered":"

The pluck() function in DataWeave 2 is a function used to convert the properties and values of these properties of an object into an array of properties, an array of values and an array of indices of those properties.<\/p>\n

The syntax of the pluck() function will be:<\/strong><\/p>\n

<input> pluck (value, key, index) -> <...><\/pre>\n
In particular, index is the order of the properties of the input object, the key is the name of the object’s properties and the value is the value of the properties.<\/p>\n
For example, I have a student object with the name attribute. has the value “Khanh” and the age attribute has a value of 30, displayed with mediaType application\/xml with the following content:<\/p>\n
<student>\r\n\t<name>Khanh<\/name>\r\n\t<age>30<\/age>\r\n<\/student><\/pre>\n
To return the array of student object properties, I will use the pluck() function as follows:<\/p>\n
%dw 2.0\r\noutput application\/xml\r\nvar data = read(\"<student>\r\n\t<name>Khanh<\/name>\r\n\t<age>30<\/age>\r\n<\/student>\", \"application\/xml\")\r\n---\r\nresult: {\r\n\tkey: data.student pluck (value, key, index) -> key\r\n}<\/pre>\n
Result:<\/p>\n
\"Using<\/p>\n
Same for index and value:<\/p>\n
%dw 2.0\r\noutput application\/xml\r\nvar data = read(\"<student>\r\n\t<name>Khanh<\/name>\r\n\t<age>30<\/age>\r\n<\/student>\", \"application\/xml\")\r\n---\r\nresult: {\r\n\tindex: data.student pluck (value, key, index) -> index,\r\n\tkey: data.student pluck (value, key, index) -> key,\r\n\tvalue: data.student pluck (value, key, index) -> value\r\n}<\/pre>\n
Result:<\/p>\n
\"Using<\/p>\n
You can use the characters $, $$ or $$$ instead of value, key and index in order.<\/strong><\/p>\n
<input> pluck ($)<\/pre>\n
for value,<\/p>\n
<input> pluck ($$)<\/pre>\n
for key and:<\/p>\n
<input> pluck ($$$)<\/pre>\n
for index.<\/p>\n
As a result, the following \bwriting way still produces similar results:<\/p>\n
%dw 2.0\r\noutput application\/xml\r\nvar data = read(\"<student>\r\n\t<name>Khanh<\/name>\r\n\t<age>30<\/age>\r\n<\/student>\", \"application\/xml\")\r\n---\r\nresult: {\r\n\tindex: data.student pluck ($$$),\r\n\tkey: data.student pluck ($$),\r\n\tvalue: data.student pluck ($)\r\n}<\/pre>\n
Result:<\/p>\n
\"Using<\/p>\n
With this writing, as you can see, we do not need to specify the value, key or index parameters. DataWeave will understand itself and produce similar results.<\/p>\n\n\n
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The pluck() function in DataWeave 2 is a function used to convert the properties and values of these properties of an object into an array of properties, an array of values and an array of indices of those properties. The syntax of the pluck() function… Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":8070,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[440],"tags":[],"class_list":["post-15197","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mule-esb-en","clearfix"],"yoast_head":"\nUsing pluck() function in DataWeave 2 - Huong Dan Java<\/title>\n<meta name=\"description\" content=\"In this tutorial, I will guide you all how to use pluck() function in DataWeave 2.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/huongdanjava.com\/using-pluck-function-in-dataweave-2.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using pluck() function in DataWeave 2 - Huong Dan Java\" \/>\n<meta property=\"og:description\" content=\"In this tutorial, I will guide you all how to use pluck() function in DataWeave 2.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/huongdanjava.com\/using-pluck-function-in-dataweave-2.html\" \/>\n<meta property=\"og:site_name\" content=\"Huong Dan Java\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/nhkhanh2406\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/nhkhanh2406\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-01T21:34:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-01T21:35:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/huongdanjava.com\/wp-content\/uploads\/2018\/03\/mule.png\" \/>\n\t<meta property=\"og:image:width\" content=\"400\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Khanh Nguyen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/KhanhNguyenJ\" \/>\n<meta name=\"twitter:site\" content=\"@KhanhNguyenJ\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Khanh Nguyen\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html\"},\"author\":{\"name\":\"Khanh Nguyen\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/#\\\/schema\\\/person\\\/dc859d7f8cbea3b593e6738de9cbb82d\"},\"headline\":\"Using pluck() function in DataWeave 2\",\"datePublished\":\"2019-10-01T21:34:59+00:00\",\"dateModified\":\"2019-10-01T21:35:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html\"},\"wordCount\":197,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/#\\\/schema\\\/person\\\/dc859d7f8cbea3b593e6738de9cbb82d\"},\"image\":{\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/huongdanjava.com\\\/wp-content\\\/uploads\\\/2018\\\/03\\\/mule.png\",\"articleSection\":[\"Mule ESB\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html\",\"url\":\"https:\\\/\\\/huongdanjava.com\\\/using-pluck-function-in-dataweave-2.html\",\"name\":\"Using pluck() function in DataWeave 2 - 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