I have this path :
c:\dev\myapp\dirA\..\dirB\myfile.txt
how to expand it to :
c:\dev\myapp\dirB\myfile.txt
Is their any Delphi functions to do this or any winapi function ?
You can use the SysUtils.ExpandFileName() function.
ExpandFileName('c:\dev\myapp\dirA\..\dirB\myfile.txt');
Result:
c:\dev\myapp\dirB\myfile.txt
Related
I want to make use of functions to get the full path and directory name of a script.
For this I made two functions :
function _jb-get-script-path ()
{
#returns full path to current working directory
# + path to the script + name of the script file
return $PWD/${0#./*}
}
function _jb-get-script-dirname ()
{
return ${(_jb-get-script-path)##*/}
}
as $(_jb-get-script-path) should be replaced by the result of the function called.
However, I get an error: ${(_jb-get-script-path)##*/}: bad substitution
therefore i tried another way :
function _jb-get-script-path ()
{
return $PWD/${0#./*}
}
function _jb-get-script-dirname ()
{
local temp=$(_jb-get-script-path);
return ${temp##*/}
}
but in this case, the first functions causes an error : numeric argument required. I tried to run local temp=$(_jb-get-script-path $0) in case the $0 wasn't provided through function call (or i don't really know why) but it didn't change anything
I don't want to copy the content of the second fonction as i don't want to replicate code for no good reason.
If you know why those errors happen, I really would like to know why, and of course, if you have a better solution, i'd gladely hear it. But I'm really interessed in the resolution of this problem.
You need to use echo instead of return which is used for returning a numeric status:
_jb-get-script-path() {
#returns full path to current working directory
# + path to the script + name of the script file
echo "$PWD/${0#./*}"
}
_jb-get-script-dirname() {
local p="$(_jb-get-script-path)"
echo "${p##*/}"
}
_jb-get-script-dirname
Is it possible to create a function interactively at the debugger interface? When I enter something like
BrightScript Debugger> function foo()
I get an error like
Syntax Error. (compile error &h02) in $LIVECOMPILE(296)
I'm guessing this is because I didn't enter the rest of the function, but I'm not sure how I could enter the rest of the function in the debugger without getting this type of error.
You can use anonymous function to create a function in a debug console like this:
BrightScript Debugger> printFoo = function() : ? "foo" : end function
Thus, you can invoke "printFoo" just like any other function:
BrightScript Debugger> printFoo()
foo
Note that colon (":") here is used as a new line symbol since you can't write multiline statements in the debug console.
I have the function
index($errorMsg, $successMsg) {....}
It works when I type in the URL.
http://localhost/website/index.php/home/index/1234/5678
But It does not work But when I type in the URL.
http://localhost/website/index.php/home/index//5678
5678 will be $errorMsg.
Is there any hints
Really bad solution for passing success or error parameters via function arguments by get method in CI.
Try use session flash data to pass success or error messages in redirection view.
$this->session->set_flashdata('errorMsg', '1234');
$this->session->set_flashdata('successMsg', '5678');
And show variables:
function index()
{
echo $this->session->flashdata('errorMsg');
echo $this->session->flashdata('successMsg');
}
Use this solution to avoid errors.
Your solution
Declare function like this
index($errorMsg, $successMsg=NULL) {....}
Explanation
index($errorMsg, $successMsg) function required both arguments(variables). If you don't pass it will produce error which is happening in your case.
index($errorMsg, $successMsg=NULL) function required first one and 2nd one is optional.If you don't pass 2nd argument $successMsg value will be null.
Note
/home/index//5678 no need use double slash after index.One will solve your purpose.You need to just check $successMsg.If it is null means you passed only $errorMsg
Is there a way to make a bash alias (or function) with its name coming from a variable?
For instance, is it possible to do something along these lines:
create_alias_with_name() {
alias $1="echo a custom alias"
}
Or something along these lines:
create_func_with_name() {
$1() {
"echo inside a function with a variable name"
}
}
In other words, I would prefer to have some kind of function "factory" that can register functions for me. Is this possible or beyond the capabilities of Bash?
Did you even try it? Your first example works fine.
You can make the second work by adding an eval:
create_func_with_name() {
eval "$1() {
echo inside a function with a variable name
}"
}
just in case, one may use a variable both as a part of the alias name and as a part of the alias command:
alias foo${var1}="bar${var2}"
Why is it that when I call RtlDosPathNameToNtPathName_U on the path \\?\C:, instead of getting back
\??\C:
I get back
\??\C:\\\?\C:
which is clearly incorrect?
Code snippet (in D):
struct CurDir { UnicodeString DosPath; HANDLE Handle; }
extern (Windows) static bool RtlDosPathNameToNtPathName_U(
in const(wchar)* DosPathName, out UnicodeString NtPathName,
out const(wchar)* NtFileNamePart, out CurDir DirectoryInfo);
wchar[] toNtPath(const(wchar)[] path)
{
UnicodeString ntPath;
CurDir curDir;
const(wchar)* fileNamePart;
enforce(RtlDosPathNameToNtPathName_U(path.ptr, ntPath,
fileNamePart, curDir));
try
{ return ntPath.Buffer[0 .. ntPath.Length / ntPath.Buffer[0].sizeof].dup; }
finally { RtlFreeHeap(RtlGetProcessHeap(), 0, ntPath.Buffer); }
}
writeln(toNtPath(r"\\?\C:")); //Returns the weird string
Update:
I figured out the problem -- see my answer.
RtlDosPathNameToNtPathName_U is giving you the correct output. The reason you see a weird-looking character in the middle is because UNICODE_STRINGs are not required to be null-terminated (which I'm sure you know already). The file name \??\C:\ is a completely valid native-format file name. I suspect what you really want is to prepend the device name instead of just referring to the GLOBAL?? directory like what RtlDosPathNameToNtPathName_U has done.
To do that, simply call NtQuerySymbolicLinkObject on \??\x:, where x is the drive letter that the path is using, and prepend the result. If it's a UNC path, prepend \Device\Mup. And so on for the other types of paths (if there are any).
I figured out the problem myself, with #wj32's help: I'd totally forgotten that the input to RtlDosPathNameToNtPathName_U needed to be null-terminated, and my code didn't handle that properly. Thanks for everyone's help!