note 12415 deleted from language.operators.bitwise by sniper

From: Date: Mon, 13 Oct 2003 00:11:05 +0000
Subject: note 12415 deleted from language.operators.bitwise by sniper
References: 1  Groups: php.notes 
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Note Submitter: DanRichter.at.programmer.dot.net ---- The left-shift operator is actually a rotation operator (shifts with wrap-around), but the right-shift operator is not. Examples: echo ( 1 << 0 ); // Returns 1 echo ( 1 << 4 ); // Returns 16 echo ( 1 << 32 ); // Returns 1 echo ( 1 << 36 ); // Returns 16 [36 = 32 + 4] echo ( 1 << 100 ); // Returns 16 [100 = 3*32 + 4] echo ( 3 >> 1 ); // Returns 1 echo ( 3 >> 2 ); // Returns 0 echo ( (1<<31) << 1 ); // Returns 0 [1<<31 in binary is 1000...000, which is negative; the shift by one ignores the sign bit and considers only the zeros]

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