js/src/tests/ecma_6/Comprehensions/nested-for-if.js@6474c204b198 (annotated)
js/src/tests/ecma_6/Comprehensions/nested-for-if.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // For and if clauses can nest without limit in comprehensions. This is |
| michael@0 | 2 | // unlike JS 1.8 comprehensions, which can only have one trailing "if" |
| michael@0 | 3 | // clause. |
| michael@0 | 4 | |
| michael@0 | 5 | function* range(start, end) { |
| michael@0 | 6 | for (var n = start; n < end; n++) |
| michael@0 | 7 | yield n; |
| michael@0 | 8 | } |
| michael@0 | 9 | |
| michael@0 | 10 | function primesBetween6And25() { |
| michael@0 | 11 | return [for (n of range(6, 25)) if (n % 2) if (n % 3) if (n % 5) n]; |
| michael@0 | 12 | } |
| michael@0 | 13 | assertDeepEq(primesBetween6And25(), [7,11,13,17,19,23]); |
| michael@0 | 14 | |
| michael@0 | 15 | function countUpToEvens(limit) { |
| michael@0 | 16 | return [for (n of range(0, limit)) if (!(n % 2)) for (m of range(0, n)) m] |
| michael@0 | 17 | } |
| michael@0 | 18 | assertDeepEq(countUpToEvens(7), [0,1,0,1,2,3,0,1,2,3,4,5]); |
| michael@0 | 19 | |
| michael@0 | 20 | reportCompare(null, null, "test"); |
