Bash Shell 字符串切割

2015-04-03  ·  1 分钟阅读  ·  Shell

分类： Shell编程 2011-07-06 14:09 801人阅读 评论 (0) 收藏 举报 bash shell Bash Shell 字符串切割 chj@linux-xzlr:Desktop> AAA=“hello First-of All” chj@linux-xzlr:Desktop> echo ${AAA#-} of All chj@linux-xzlr:Desktop> AAA=111-222 chj@linux-xzlr:Desktop> echo ${AAA%-} 111 chj@linux-xzlr:Desktop> echo ${AAA#*-} 222 chj@linux-xzlr:Desktop> 记住瞬间，精彩永恒

chj@linux-xzlr:trunk> AA=“a bc d ef” chj@linux-xzlr:trunk> BB=“d” chj@linux-xzlr:trunk> echo ${AA%%$BB*} a bc chj@linux-xzlr:trunk> echo ${AA$BB} bash: ${AA$BB}: bad substitution chj@linux-xzlr:trunk> echo ${AA#*$BB} ef chj@linux-xzlr:trunk>

cjash@linux-sdik:dl> AAA=abcdef cjash@linux-sdik:dl> echo ${AAA:2} cdef cjash@linux-sdik:dl> echo ${AAA-2} abcdef cjash@linux-sdik:dl> echo ${AAA:-2} abcdef cjash@linux-sdik:dl> echo ${AAA#2} abcdef cjash@linux-sdik:dl> echo ${AAA#*2} abcdef cjash@linux-sdik:dl> echo ${AAA 2} bash: ${AAA 2}: bad substitution cjash@linux-sdik:dl> echo ${AAA$2} bash: ${AAA$2}: bad substitution cjash@linux-sdik:dl> echo ${AAA: -2} ef cjash@linux-sdik:dl> echo ${AAA%2} abcdef cjash@linux-sdik:dl> echo ${AAA#*2} abcdef cjash@linux-sdik:dl> echo ${AAA::2} ab cjash@linux-sdik:dl>

cjash@linux-sdik:ppp> AAA=abcabcabc cjash@linux-sdik:ppp> echo ${AAA%${AAA: -2}} abcabca cjash@linux-sdik:ppp>

cjash@linux-sdik:ppp> AAA=abcabcabc cjash@linux-sdik:ppp> echo ${AAA%${AAA: -2}} abcabca cjash@linux-sdik:ppp>

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shell里面 value=“L(50000:10000)” FORM_LONG_LEFT_TIME_TALK=$value FORM_LONG_TIME_TALK=${FORM_LONG_LEFT_TIME_TALK%:} FORM_LONG_TIME_TALK=${FORM_LONG_TIME_TALK#(} FORM_LONG_TIME_TALK=expr ${FORM_LONG_TIME_TALK} / 1000 FORM_LEFT_TIME_TALK=${FORM_LONG_LEFT_TIME_TALK#:} FORM_LEFT_TIME_TALK=${FORM_LEFT_TIME_TALK%)} FORM_LEFT_TIME_TALK=expr ${FORM_LEFT_TIME_TALK} / 1000