Try out below code
store | http://www.exampleUrl.com/xxxxxxxxxxxxxxxxxx/-|845290 | URL
store | 1 | delimiter
store | javascript{storedVars['URL'].split('/-|')[storedVars['delimiter']]} | result
echo | ${result}
Result will be - 845290
Try out below code
store | http://www.exampleUrl.com/xxxxxxxxxxxxxxxxxx/-|845290 | URL
store | 1 | delimiter
store | javascript{storedVars['URL'].split('/-|')[storedVars['delimiter']]} | result
echo | ${result}
Result will be - 845290