tilde

问题 I have a variable in my bash script whose value is something like this: ~/a/b/c Note that it is unexpanded tilde. When I do ls -lt on this variable (call it $VAR), I get no such directory. I want to let bash interpret/expand this variable without executing it. In other words, I want bash to run eval but not run the evaluated command. Is this possible in bash? How did I manage to pass this into my script without expansion? I passed the argument in surrounding it with double quotes. Try this

问题 I need to write an argument to a file in a Bash script, so I'm doing something like this, echo "Argument is: $1" >> file The problem is that if there's a tilde (~) in the argument I don't want it expanded to the home directory. So if the user passed ~/bin as an argument to the script, it would get written as ~/bin and not /home/user/bin. How do I do this? 回答1: I assume your program is started as: $ your_prog ~/foo The argument is translated before your program is even started, so there's

问题 The folder consists of files with filenames like abc~1 , 123~1 , a1d2~3 . When I do git add --all it says, $ git add --all error: Invalid path 'abc~1.png' error: unable to add abc~1.png to index fatal: adding files failed I did a trial and error and I found this error persists only when the tilde symbol is followed by a number. If the folder is tracked by git for the first time, the other files are also not tracked by Git. $ git clean --dry-run Would remove Rest.png Would remove abc~1.png

问题 The folder consists of files with filenames like abc~1 , 123~1 , a1d2~3 . When I do git add --all it says, $ git add --all error: Invalid path 'abc~1.png' error: unable to add abc~1.png to index fatal: adding files failed I did a trial and error and I found this error persists only when the tilde symbol is followed by a number. If the folder is tracked by git for the first time, the other files are also not tracked by Git. $ git clean --dry-run Would remove Rest.png Would remove abc~1.png

问题 I'm a web application development noob. I have a function that opens a file and reads it. Unfortunately, the directory structures between the test and production servers differ. I was told to "use a path relative to ~". I haven't been able to find any resources on the '~', though! How do I use the tilde character in the context of paths? EDIT: This is in Python. I fixed the problem, using os.path.expanduser('~/path/in/home/area'). 回答1: it is your $HOME var in UNIX, which usually is /home

问题 I tried to get the Android Studio launcher (studio.sh) to use my manually installed Java (not the system-wide default Java). Since I already declared PATH and JAVA_HOME in my .bashrc file, I simply sourced that file in the shell script: . /home/foobar/.bashrc but for some reason, $JAVA_HOME/bin/java was still not recognized as an executable file by the script. I added some logging and found out that JAVA_HOME was expanded as ~/install/java..., i.e. the tilde operator was not expanded into the

问题 I tried to get the Android Studio launcher (studio.sh) to use my manually installed Java (not the system-wide default Java). Since I already declared PATH and JAVA_HOME in my .bashrc file, I simply sourced that file in the shell script: . /home/foobar/.bashrc but for some reason, $JAVA_HOME/bin/java was still not recognized as an executable file by the script. I added some logging and found out that JAVA_HOME was expanded as ~/install/java..., i.e. the tilde operator was not expanded into the

问题 I have my project set up with the virtual path "/MyVirtualPath", create the virtual directory in IIS 6 (W2003) and everything works fine. Then to work better with Google Analytics I change the virtual path "/myvirtualpath" and change all redicecciones and links to lowercase. also applies the class "lowercase route urls in aspnet mvc" and works perfectly. The problem I had to modify the virtual directory in IIS, delete virtual path "/MyVirtualPath" and I created the new "/myvirtualpath", but

问题 I am working on a code for image processing in Matlab and the thinning won't work unless I call the function on the original image with the tilde and then save it to the same variable (found it somewhere on the internet). I= bwmorph(~I, 'thin', inf); I=~I; My question is, what does the tilde do/mean here? 回答1: Tilde ~ is the NOT operator in Matlab, and it has nothing special with images, it just treats them as matrices. ~ as operator return a boolean form of the matrix it's called against,

问题 I wanna do 2 similar operations with Pandas in Python 3. One with tilde and another without tilde. 1 - df = df[~(df.teste.isin(["Place"]))] 2 - df = df[(df.teste.isin(["Place"]))] I tried to declare the tilde as variable, so I could write just one line and then decide if I wanna use with or without tilde. But it doesn't work: tilde = ["~", ""] df = df[tilde[0](df.teste.isin(["Place"]))] Is possible do something that could reduce my code? Cause I am writing many equal lines just exchanging the