Find Chess960 starting position identifier: Difference between revisions
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} |
} |
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List<Integer> rookAndKing = |
List<Integer> rookAndKing = |
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List.of(aPosition.indexOf('R'), aPosition.indexOf('K'), aPosition.lastIndexOf('R')); |
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if ( ! ( rookAndKing.get(0) < rookAndKing.get(1) && rookAndKing.get(1) < rookAndKing.get(2) ) ) { |
if ( ! ( rookAndKing.get(0) < rookAndKing.get(1) && rookAndKing.get(1) < rookAndKing.get(2) ) ) { |
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throw new AssertionError("The king must be between the two rooks."); |
throw new AssertionError("The king must be between the two rooks."); |
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private static String retainIf(String aText, Predicate<Character> aPredicate) { |
private static String retainIf(String aText, Predicate<Character> aPredicate) { |
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return aText.chars().mapToObj(i -> (char) i).filter(aPredicate) |
return aText.chars().mapToObj( i -> (char) i ).filter(aPredicate) |
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.map(String::valueOf).reduce("", String::concat); |
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} |
} |
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