Nick Allen created METRON-626: --------------------------------- Summary: Add Higher-Order Map Function to Stellar Key: METRON-626 URL: https://issues.apache.org/jira/browse/METRON-626 Project: Metron Issue Type: Improvement Reporter: Nick Allen
It would be extremely useful to have a 'map' higher-order function in Stellar. A 'flat map' might also be needed. [https://en.wikipedia.org/wiki/Map_(higher-order_function)] A few examples that I am thinking of. Ignore my choice of syntax. I am just trying to express the use cases here. Fetch all of the profile measurements over the past 2 hours. There may be many. What is the mean of each of those measurements? {code} stats := PROFILE_GET('p1', 'e1', 2, "HOURS") stats.MAP( s -> STATS_MEAN(s)) {code} Get profile measurements taken 1 week ago, 2 weeks ago, and 3 weeks ago, so that I can then compare them. {code} { "1 week", "2 weeks", "3 weeks" }.MAP( lookback -> PROFILE_GET('p1','e1', lookback) {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)