大约有 47,000 项符合查询结果（耗时：0.0550秒） [XML]
What is the use case of noop [:] in bash?
...y, you are just making the shell do extra work in expanding * to a list of files in the current directory; it won't actually affect how the script works.
– chepner
Nov 5 '14 at 14:48
...
iPhone Debugging: How to resolve 'failed to get the task for process'?
I have just added a provisioning profile to XCode (needed to support notifications and in app purchase), setup as needed the build configuration for ad hoc distribution, and tried to run the app on the device (I have done this several times in the past, without any problem).
...
How to run multiple Python versions on Windows
... the %PATH% environment variable, checking for an executable, either batch file (.bat), command file (.cmd) or some other executable to run (this is controlled by the PATHEXT environment variable), that matches the name given. When it finds the correct file to run the file is being run.
Now, if you...
How can I get the line number which threw exception?
...atch (Exception ex)
{
// Get stack trace for the exception with source file information
var st = new StackTrace(ex, true);
// Get the top stack frame
var frame = st.GetFrame(0);
// Get the line number from the stack frame
var line = frame.GetFileLineNumber();
}
Note that th...
How do I put my website's logo to be the icon image in browser tabs?
...
That image is called 'favicon' and it's a small square shaped .ico file, which is the standard file type for favicons. You could use .png or .gif too, but you should follow the standard for better compatibility.
To set one for your website you should:
Make a square image of your logo (pre...
Seeing escape characters when pressing the arrow keys in python shell
...STARTUP variable is defined, for me it points to /etc/pythonstart and that file is executed by the python process before going interactive, which setups readline/history handling.
Thanks to @chown here is the docs on this: http://docs.python.org/2/tutorial/interactive.html
...
Understand the “Decorator Pattern” with a real world example
...ou are writing an encryption module. This encryption can encrypt the clear file using DES - Data encryption standard. Similarly, in a system you can have the encryption as AES - Advance encryption standard. Also, you can have the combination of encryption - First DES, then AES. Or you can have first...
How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
...ting the UAC settings. Project + Add New Item, pick "Application Manifest File". Edit the manifest text or copy/paste this:
<?xml version="1.0" encoding="utf-8"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3" >
...
How does password salt help against a rainbow table attack?
...e a rainbow table.
To understand the first one, imagine a single password file that contains hundreds of usernames and passwords. Without a salt, I could compute "md5(attempt[0])", and then scan through the file to see if that hash shows up anywhere. If salts are present, then I have to compute "md...
read.csv warning 'EOF within quoted string' prevents complete reading of file
I have a CSV file (24.1 MB) that I cannot fully read into my R session. When I open the file in a spreadsheet program I can see 112,544 rows. When I read it into R with read.csv I only get 56,952 rows and this warning:
...