Read First Character of Each Line in File


 
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# 8  
Old 07-11-2007
Quote:
Originally Posted by jim mcnamara
${line:0:1}

works in bash just fine, but not ksh.
It would work if you use the enhanced korn shell (ksh93). For something that takes this long it might be worth testing to see which is faster, assigning it to a one character variable with typeset in the standard korn shell or using the enhanced korn shell's variable substitution. Of course going from 5 hours to 45 minutes is already a pretty nice improvement. Smilie
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PCK(5)							Standards, Environments, and Macros						    PCK(5)

NAME
PCK, pck - map between PCK and character set DESCRIPTION
PCK stands for PC Kanji code. It is also known as Shift-JIS (MS kanji) code. This manual page shows map between PCK and character set. PCK allocates the first byte of each kanji code which corresponds to JIS X0208-1990 and so on to the code other than code range of 0x00-0x7f and 0xa1-0xdf. The following is a map table for PCK and character set. +-----------------------------------------------------------+ |PCK character set | |0x00 - 0x19 JIS X 0201-1976 function | | character set | |0x20 JIS X 0201-1976 space char- | | acter | |0x21 - 0x7e JIS X 0201-1976 figure | | character set for roman | | character | |0x7f JIS X 0201-1976 erase char- | | acter | |0xa1 - 0xdf JIS X 0201-1976 figure | | character set for katakana | | (except for an area of | | undefined character E/0 - | | F/14) | |0x8140 - 0x817e JIS X 0208-1990 (1 ku 1 | | ten - 1 ku 63 ten) | |0x8180 - 0x819e JIS X 0208-1990 (1 ku 64 | | ten - 1 ku 94 ten) | |0x819f - 0x81fc JIS X 0208-1990 (2 ku 1 | | ten - 2 ku 94 ten) | | : : | | : : | |0x9f9f - 0x9ffc JIS X 0208-1990 (62 ku 1 | | ten - 62 ku 94 ten) | |0xe040 - 0xe07e JIS X 0208-1990 (63 ku 1 | | ten - 63 ku 63 ten) | | : : | | : : | |0xea40 - 0xea7e JIS X 0208-1990 (83 ku 1 | | ten - 83 ku 63 ten) | |0xea80 - 0xea9e JIS X 0208-1990 (83 ku 64 | | ten - 83 ku 94 ten) | |0xea9f - 0xeafc JIS X 0208-1990 (84 ku 1 | | ten - 84 ku 94 ten) | +-----------------------------------------------------------+ The differences from character set of Japanese EUC are, o Character set of Japanese EUC codeset 3 (JIS X 0212-1990) is not assigned except a part of Vender Defined Character (IBM extension character) (see NOTES). o Character set which corresponds to Japanese EUC C1 control code is not assigned. NOTES
In PCK area below has special meaning. +---------------------------------------------------------------------------+ |PCK area of character set meaning | |0x8740 - 0x879e JIS X 0208-1990 13 ku Vender Defined Character | | (special symbols) | |0xeb40 - 0xecfc Invalid | |0xed40 - 0xeffc Vender Defined Character | | (IBM extension character NEC | | selected) | |0xf040 - 0xf9fc User Defined Character | | 1 ku - 20 ku | |0xfa40 - 0xfcfc Vender Defined Character | | (IBM extension character) | +---------------------------------------------------------------------------+ SEE ALSO
eucJP(5) SunOS 5.10 6 Jan 1999 PCK(5)