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Update AboutConditionals.java #80

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Update AboutConditionals.java #80

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b303c0e
Update AboutConditionals.java
matyb Feb 7, 2018
5d4fc74
compile error, editing on github + phone
matyb Feb 7, 2018
e8f064e
Update AboutConditionals.java
matyb Feb 7, 2018
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40 changes: 34 additions & 6 deletions koans/src/beginner/AboutConditionals.java
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Original file line number Diff line number Diff line change
Expand Up @@ -147,11 +147,39 @@ public void switchStatementSwitchValues() {

@Koan
public void shortCircuit() {
int i = 1;
int a = 6;
// Why did we use a variable here?
// What happens if you replace 'a' with '6' below?
if ((a < 9) || (++i < 8)) i = i + 1;
assertEquals(i, __);
Counter trueCount = new Counter(true);
Counter falseCount = new Counter(false);
String x = "Hai";
if (trueCount.count() || falseCount.count()) {
x = "kthxbai";
}
assertEquals(x, __);
assertEquals(trueCount.count, __);
assertEquals(falseCount.count, __);
}

@Koan
public void bitwise() {
Counter trueCount = new Counter(true);
Counter falseCount = new Counter(false);
String x = "Hai";
if (trueCount.count() | falseCount.count()) {
x = "kthxbai";
}
assertEquals(x, __);
assertEquals(trueCount.count, __);
assertEquals(falseCount.count, __);
}

class Counter {
boolean returnValue;
int count = 0;
Counter(boolean returnValue) {
this.returnValue = returnValue;
}
boolean count() {
count++;
return returnValue;
}
}
}