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Object Examples

Conditional Expression

Expression

$.hasOwnProperty('query.fred') ? $query.fred : 'not present in input'

Description This example is one way of doing an if-then-else expression.

Example

For example, to set a default pipeline variable in a document object, if you use the following expression for a mapper variable $lastname:

$.hasOwnProperty('lastname') ? $lastname : _lastname

$lastname has the value of $lastname as supplied by a document in the stream. If there is no document input, then $lastname is set to the _lastnameparameter value.

String Examples

Checking for a Non-empty String

Expression	$customer.lastname.trim() \|\| 'default'
Description	The expression verifies if `$customer.lastname` and `$customer.lastname.trim()` has a value. If it does, then the value of `$customer.lastname.trim()` is applied to the target path, otherwise 'default' gets applied to the target path.

Checking for an Existing Value

Expression	$.hasOwnProperty('customer.lastname') \|\| 'default'
Description	The expression verifies if `$customer.lastname` exists in the input document. It returns `True` if `$customer.lastname` exists, else it shows 'default' as a string and applies it to the target path.

Checking for a Non-empty String and an Existing Value

Expression	($.hasOwnProperty('customer.lastname') && $customer.lastname.trim()) \|\| 'default''
Description	The expression verifies if a property exists in the input document and if `$customer.lastname` and `$customer.lastname.trim()` provide a value. If it does then it applies its value to the target path, otherwise it applies 'default' to the target path.

Creating an Email Address from First Initial, Last Name

Expression	$first_name.substr(0,1).toLowerCase()+$last_name.toLowerCase() + "@example.com" $first_name.charAt(0).toLowerCase()+$last_name.toLowerCase() + "@example.com"
Description	Either expression grabs the first letter of the $first_name field, converts it to lowercase, then adds it to the $last_name value and appends "@example.com" before writing it to $Email.

Date Examples

Creating and Formatting a Date in a Specific Timezone

Expression	Date.now().toLocaleDateString('{\"timeZone\":\"PST\", "format":"yyyy-MM-dd"}')
Description	The expression creates the current date time in the PST timezone and formats its output into a string in the form of yyyy-MM-dd.

Formatting a Date to Include Letters

Expression	Date.now().toLocaleDateTimeString('{"format":"yyyy-MM-dd\'T\'hh:mm:ss.SSS\'Z\'"}')
Description	The expression creates the current date time and format its output into a string to include the letter "T" and "Z". Characters outside of normal SQLDate specials can be added by escaping them.

Creating an ISO-formatted Date in the Current Timezone

Expression	Date.now().toLocaleDateString('{\"timeZone\":\"PST\"}')
Description	The expression creates the current date time in the local time zone and formats its output into a string for the ISO date time format.

Parsing a Date

Expression

Date.parse($StandardDate)

Description

This expression parses a string representation of $StandardDate into a DateTime object. The string representation should have one of the following formats:

yyyy/MM/dd
yyyy/MM/dd HH:mm
yyyy/MM/dd HH:mm:ss
yyyy/MM/dd HH:mm:ss.SSS
MM/dd/yyyy
MM/dd/yyyy HH:mm
MM/dd/yyyy HH:mm:ss
MM/dd/yyyy HH:mm:ss.SSS
MMM dd, yyyy
EEE, dd MMM yyyy HH:mm:ss
EEE, dd MMM yyyy HH:mm:ss z
EEE, dd MMM yyyy HH:mm:ss 'GMT'Z
yyyy-MM-dd
yyyy-MM-dd'T'HH:mm:ss
yyyy-MM-dd'T'HH:mm:ssXXX
yyyy-MM-dd'T'HH:mm:ss.SSS
yyyy-MM-dd'T'HH:mm:ss.SSSXXX
yyyy-MM-dd HH:mm
yyyy-MM-dd HH:mm:ss
yyyy-MM-dd HH:mm:ssXXX
yyyy-MM-dd HH:mm:ss.SSS
yyyy-MM-dd HH:mm:ss.SSSXXX

Parsing a Non-standard Date

Expression	Date.parse($NonStandardDate, "yyyy MM dd") Date.parse($nonstandard_datetime, "yyyy-MM-dd HH:mm:ss.SSS")
Description	These examples parse the date into a DateTime object using the provided format.

Formatting Today's Date to Display as the Current Month

Expression	Date.now().toLocaleDateString({"format":"MMMM"})
Description	This expression takes today's date and formats the output in a string indicating the month in text.

Filtering Examples

Filtering for Two Possible Values

Expression	$Priority == "Resolve Immediately" \|\| $Priority == "High Attention"
Description	Used in a Filter Snap, this expression finds only those items that have $Priority set to either Resolve Immediately or High Attention.

Filtering by Multiple Fields

Expression	$Workflow == "Ready For Testing" && (($Priority == "Resolve Immediately") \|\| ($Priority == "High Attention"))
Description	Used in a Filter Snap, this expression finds only those items that are in the $Workflow step of Ready for Testing and $Priority is set to either Resolve Immediately or High Attention.

Filtering by Date within Timeframe

Expression	$ClosedDate >= Date.now().minusHours(24)
Description	Used in a Filter Snap, this expression finds only those items that have a $CloseDate within the last 24 hours.

Other Examples

Making a Field Value a Link

Expression	'<a href="' + $Link + '">' + $ID + '</a>'
Description	This expression turns the value of the $ID field into a HTML link pointing to the location found in the $Link field.

Mapping Values to an Array

This series of expressions maps data from:

[
  {
    "ORG_ASSIGNMENT": [
      {
        "ORGTXT": "Network Services",
        "JOBTXT": "Service technician",
        "POSTXT": "Manager"
      }
    ]

to name/value pairs within an array:

[
  "Organization": {
            "Unit": [
              [
                "Position",
                "Manager"
              ],
              [
                "Grade",
                "Service technician"
              ],
              [
                "Division",
                "Network Services"
              ]
            ]
          }
]

Expression	[‘Position’, jsonPath($, “ORG_ASSIGNMENT[*].POSTXT”).toString()]
Target path	$Users.User[*].Organization.Unit[0]

Expression	[‘Grade’, jsonPath($, “ORG_ASSIGNMENT[*].JOBTXT”).toString()]
Target path	$Users.User[*].Organization.Unit[1]

Expression	[‘Division’, jsonPath($, “ORG_ASSIGNMENT[*].ORGTXT”).toString()]
Target path	$Users.User[*].Organization.Unit[3]

SnapLogic Documentation

Expression Language Examples