refX.html (1237B)
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/1998/REC-html40-19980424/loose.dtd"> 2 <html lang="en"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5 <title>X</title> 6 <link rel="stylesheet" href="doc.css" type="text/css"> 7 </head> 8 <body> 9 10 <h1>X</h1> 11 12 <dl> 13 14 <dt><a name="xchg"><code>(xchg 'var 'var ..) -> any</code></a> 15 <dd>Exchange the values of successive <code>var</code> argument pairs. 16 17 <pre><code> 18 : (setq A 1 B 2 C '(a b c)) 19 -> (a b c) 20 : (xchg 'A C 'B (cdr C)) 21 -> 2 22 : A 23 -> a 24 : B 25 -> b 26 : C 27 -> (1 2 c) 28 </code></pre> 29 30 <dt><a name="xor"><code>(xor 'any 'any) -> flg</code></a> 31 <dd>Returns T if exactly one of the arguments evaluates to non-<code>NIL</code>. 32 33 <pre><code> 34 : (xor T NIL) 35 -> T 36 : (xor T T) 37 -> NIL 38 </code></pre> 39 40 <dt><a name="x|"><code>(x| 'num ..) -> num</code></a> 41 <dd>Returns the bitwise <code>XOR</code> of all <code>num</code> arguments. When 42 one of the arguments evaluates to <code>NIL</code>, it is returned immediately. 43 See also <code><a href="ref_.html#&">&</a></code>, <code><a 44 href="ref_.html#|">|</a></code> and <code><a 45 href="refB.html#bit?">bit?</a></code>. 46 47 <pre><code> 48 : (x| 2 7) 49 -> 5 50 : (x| 2 7 1) 51 -> 4 52 </code></pre> 53 54 </dl> 55 56 </body> 57 </html>