How do I get the "// TODO: put the first result from the array into the new custom field on the iss"

[himanshu upadhyay]

import com.atlassian.jira.component.ComponentAccessor

import com.atlassian.jira.issue.fields.CustomField

import com.atlassian.jira.issue.CustomFieldManager

import com.atlassian.query.Query

import com.atlassian.jira.issue.search.SearchResults

import com.atlassian.jira.bc.issue.search.searchservice

import com.atlassian.jira.issue.Issue

import com.atlassian.jira.issue.IssueManager

import com.atlassian.jira.user.ApplicationUser

import com.atlassian.jira.web.bean.PagerFilter

I ID for the old "Work Type" custom field that was a multi-select field

Long workTypeFieldId = 13856L

// ID for the new "Work Type custom field" that is a single-select field

Long newhorkTypeFieldId = 30439L

CustomFieldManager customFieldManager = ComponentAccessor.customFieldManager

I/ getting the "work Type" custom field

//ustomField workTypeField = customFieldManager.getCustomFieldobject(workTypeFieldId)

CustomField newworkTypeField = customFieldManager.getcustomFieldobject (newworkTypeFieldrd)

IssueManager issueManager = ComponentAccessor.issueManager

// Username for the user that we will run the script as

String svcAccountUsername = 'beacon'

// Getting the user from Dira based off of the username

ApplicationUser user = ComponentAccessor.userManager.getuserByName(svcAccountUsername)

// String query that is used in JQL. This could also be executed in the UI at https://jira.qa.sie.sony.com/issues/?jql=

I/ Building and executing the query to find all issues with the old work type field that do not have an empty value

String jqlstr = 'cf[13848] is NOT EMPTY'

Searchservice searchservice = ComponentAccessor.getcomponent(Searchservice.class)

SearchService.ParseResult parseResult = searchService.parseQuery(user, jqlstr)

// Getting results for 10 issues (script will need to update every issue, but doing all at once could put Jira into a bad state)

SearchResults searchResults = searchService. search(user, parseResult.query, PagerFilter.newpageAlignedFilter(@, 10))

// Iterating over all issues that were found

for (Issue issue : searchResults.results) {

// Get the Work Type custom field value from each issue

def val = issue.getcustomFieldvalue (workTypeField)

// Get first item from array

// TODO: put the first result from the array into the new custom field on the issue

[himanshu upadhyay]

If any suggestion with the code for  

// Get first item from array

// TODO: put the first result from the array into the new custom field on the issue

would be greatful for me