require 'pdf/charts/stddev' pdf = PDF::Writer.new chart = PDF::Charts::StdDev.new p chart.leading_gap #chart.leading_gap = 100 chart.leading_gap = -200 chart.data << PDF::Charts::StdDev::DataPoint.new(1, 4.0000, 0.5774) chart.render_on pdf…

Java FAQ：S011 Q-13 class C2008042601 { static int x = 10; { System.out.println("C2008042601 {} "); } static { System.out.println("C2008042601 static {} 1 " + x); x = 20; } static { System.out.println("C2008042601 static {} 2 " + x); } C20…

「yacc.yacc(debug=1, debugfile="debugging.out")」 #!/usr/bin/env python import ply.lex as lex tokens = ( 'A', 'B', 'C', ) t_A = r'A' t_B = r'B' t_C = r'C' t_ignore = " \t" def t_error(t): print "Illegal character '%s'" % t.value[0] t.lexer…