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Ingy döt Net 2026-02-01 16:33:20 -08:00
parent 5150844a7d
commit 4bb20c9b71
7735 changed files with 38060 additions and 199180 deletions
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116
Task/Balanced-brackets/Java/balanced-brackets-2.java
View file

@ -2,63 +2,63 @@ import java.util.ArrayDeque;
import java.util.Deque;
public class BalancedBrackets {
public static boolean areSquareBracketsBalanced(String expr) {
return isBalanced(expr, "", "", "[", "]", false);
}
public static boolean areBracketsBalanced(String expr) {
return isBalanced(expr, "", "", "{([", "})]", false);
}
public static boolean areStringAndBracketsBalanced(String expr) {
return isBalanced(expr, "'\"", "\\\\", "{([", "})]", true);
}
public static boolean isBalanced(String expr, String lit, String esc, String obr, String cbr, boolean other) {
boolean[] inLit = new boolean[lit.length()];
Deque<Character> stack = new ArrayDeque<Character>();
for (int i=0; i<expr.length(); i+=1) {
char c = get(expr, i);
int x;
if ((x = indexOf(inLit, true)) != -1) {
if (c == get(lit, x) && get(expr, i-1) != get(esc, x)) inLit[x] = false;
}
else if ((x = indexOf(lit, c)) != -1)
inLit[x] = true;
else if ((x = indexOf(obr, c)) != -1)
stack.push(get(cbr, x));
else if (indexOf(cbr, c) != -1) {
if (stack.isEmpty() || stack.pop() != c) return false;
}
else if (!other)
return false;
}
return stack.isEmpty();
}
static int indexOf(boolean[] a, boolean b) {
for (int i=0; i<a.length; i+=1) if (a[i] == b) return i;
return -1;
}
static int indexOf(String s, char c) {
return s.indexOf(c);
}
static char get(String s, int i) {
return s.charAt(i);
}
public static void main(String[] args) {
System.out.println("With areSquareBracketsBalanced:");
for (String s: new String[] {
"", "[]", "[][]", "[[][]]", "][", "][][", "[]][[]", "[", "]"
}
) {
System.out.printf("%s: %s\n", s, areSquareBracketsBalanced(s));
}
System.out.println("\nBut also with areStringAndBracketsBalanced:");
for (String s: new String[] {
"x[]", "[x]", "[]x", "([{}])", "([{}]()", "([{ '([{\\'([{' \"([{\\\"([{\" }])",
}
) {
System.out.printf("%s: %s\n", s, areStringAndBracketsBalanced(s));
}
}
public static boolean areSquareBracketsBalanced(String expr) {
return isBalanced(expr, "", "", "[", "]", false);
}
public static boolean areBracketsBalanced(String expr) {
return isBalanced(expr, "", "", "{([", "})]", false);
}
public static boolean areStringAndBracketsBalanced(String expr) {
return isBalanced(expr, "'\"", "\\\\", "{([", "})]", true);
}
public static boolean isBalanced(String expr, String lit, String esc, String obr, String cbr, boolean other) {
boolean[] inLit = new boolean[lit.length()];
Deque<Character> stack = new ArrayDeque<Character>();
for (int i=0; i<expr.length(); i+=1) {
char c = get(expr, i);
int x;
if ((x = indexOf(inLit, true)) != -1) {
if (c == get(lit, x) && get(expr, i-1) != get(esc, x)) inLit[x] = false;
}
else if ((x = indexOf(lit, c)) != -1)
inLit[x] = true;
else if ((x = indexOf(obr, c)) != -1)
stack.push(get(cbr, x));
else if (indexOf(cbr, c) != -1) {
if (stack.isEmpty() || stack.pop() != c) return false;
}
else if (!other)
return false;
}
return stack.isEmpty();
}
static int indexOf(boolean[] a, boolean b) {
for (int i=0; i<a.length; i+=1) if (a[i] == b) return i;
return -1;
}
static int indexOf(String s, char c) {
return s.indexOf(c);
}
static char get(String s, int i) {
return s.charAt(i);
}
public static void main(String[] args) {
System.out.println("With areSquareBracketsBalanced:");
for (String s: new String[] {
"", "[]", "[][]", "[[][]]", "][", "][][", "[]][[]", "[", "]"
}
) {
System.out.printf("%s: %s\n", s, areSquareBracketsBalanced(s));
}
System.out.println("\nBut also with areStringAndBracketsBalanced:");
for (String s: new String[] {
"x[]", "[x]", "[]x", "([{}])", "([{}]()", "([{ '([{\\'([{' \"([{\\\"([{\" }])",
}
) {
System.out.printf("%s: %s\n", s, areStringAndBracketsBalanced(s));
}
}
}

22
Task/Balanced-brackets/Java/balanced-brackets.java
View file

@ -1,19 +1,19 @@
grammar balancedBrackets ;
options {
language = Java;
language = Java;
}
bb : {System.out.print("input is: ");} (balancedBrackets {System.out.print($balancedBrackets.text);})* NEWLINE {System.out.println();}
;
bb : {System.out.print("input is: ");} (balancedBrackets {System.out.print($balancedBrackets.text);})* NEWLINE {System.out.println();}
;
balancedBrackets
: OpenBracket balancedBrackets* CloseBracket
;
: OpenBracket balancedBrackets* CloseBracket
;
OpenBracket
: '['
;
: '['
;
CloseBracket
: ']'
;
NEWLINE : '\r'? '\n'
;
: ']'
;
NEWLINE : '\r'? '\n'
;