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30min_guides's Issues

菜鸟的一个问题

搜索结果只有一条:ToolbarSearchViewController.m,点文件名下方被高亮的“Performed”字串,右侧代码编辑区会自动打开这个文件,并滚动屏幕,使包含“Performed”的这一行出现在编辑区的中间。
修改双引号里的字串,随便改成啥,然后按“Command S”保存。

修改了里面的字串后仍然fail了,怎么破。(ps. ios菜鸟初学,有c语言基础)

求指点,我想写个独立界面的Shell程序

带独立界面是指像mail一样,进入mail程序之后就进入了mail的程序界面,输入的命令就无需要一长条。
打算用PHP写这个Shell程序,不知是否会遇到什么问题?

望指教

for循环错误

for skill in Ada Coffe Action Java do
echo "I am good at ${skill}Script"
done
缺了个分号,应该是

for skill in Ada Coffe Action Java; do
for skill in Ada Coffe Action Java do
echo "I am good at ${skill}Script"
done

if else-if else

if condition1
then
command1
elif condition2
command2
else
commandN
fi
在condition2后面是不是少个then呢

关于expr 命令

string="alibaba is a great company"
echoexpr index "$string" is

不是查找单词,而是查找字符,在centos 6.5 中的输出结果是3

多行注释

sh里的多行注释不是
:EOF
注释的内容
EOF
?为啥说没有多行注释

查找子字符串问题

查找子字符串

string="alibaba is a great company"
echo expr index "$string" is#输出:8,这个语句的意思是:找出单词is在这名话中的位置

试了下, 输出好像跟描述的不符.
"expr index strings chars,只要chars中的任意一个字符在strings中出现,就返回所在的位置,否则返回0"
是这个意思吗?

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