Bash Shell 字符串切割 分类： Shell编程 2011-07-06 14:09
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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
==============================================================
1.
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>
==============================================================
2.
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>
==============================================================
3.
cjash@linux-sdik:ppp> AAA=abcabcabc
cjash@linux-sdik:ppp> echo ${AAA%${AAA: -2}}
abcabca
cjash@linux-sdik:ppp>
==============================================================
4.
cjash@linux-sdik:ppp> AAA=abcabcabc
cjash@linux-sdik:ppp> echo ${AAA%${AAA: -2}}
abcabca
cjash@linux-sdik:ppp>
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5.
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6.
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7.
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8.
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9.
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