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Member "elasticsearch-6.8.23/docs/painless/painless-statements.asciidoc" (29 Dec 2021, 737 Bytes) of package /linux/www/elasticsearch-6.8.23-src.tar.gz:

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Painless supports all of Java’s control flow statements except the switch statement.

Conditional statements

If / Else
if (doc[item].size() == 0) {
  // do something if "item" is missing
} else {
  // do something else

Loop statements


Painless also supports the for in syntax from Groovy:

for (def item : list) {