b[1] ==b[9]
true
b[1] ==b[5]
true
b[5] == b[9]
true
b[1]==b[5]==b[9]
false
Javascript got me crazy. Does anyone have solution to it. I was making tic tac toe and checking whether rows of a board are equal. Even if they are equal it shows false.
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Henry Ecker
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EIPWEIDWEP
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1show the code please – Thecave3 Jun 28 '21 at 15:40
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2Does this answer your question? [Javascript compare 3 values](https://stackoverflow.com/questions/9973323/javascript-compare-3-values) – Flo Jun 28 '21 at 15:43
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@Thecave3 help! – EIPWEIDWEP Jun 28 '21 at 15:43
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tic-tac-toe usually only has 9 boxes, so b[9] would be out of bounds in JavaScript since JS indexes from 0 (unless you're manually make it size 10). Assuming you are using a size 10 array, indices 1, 5, and 9 would make up a diagonal – Samathingamajig Jun 28 '21 at 15:48
1 Answers
3
Unlike Python, but like most programming languages, the == operator doesn't chain (except with booleans), so saying b[1]==b[5]==b[9], assuming that b[1]==b[5] is true, is equal to saying true==b[9], which doesn't make sense.
You need to use the && operator (which is the same as Python's and operator):
b[1] ==b[9]
true
b[1] ==b[5]
true
b[5] == b[9]
true
b[1]==b[5] && b[5]==b[9]
true
Samathingamajig
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