escaping

问题 Can someone escape this sed shell command in Jenkins groovy script for me? So hard. sh (""" sed "s/(AssemblyInformationalVersion\(\")(.*)(\")/\1${productVersion}\3/g" AssemblyInfoGlobal/AssemblyInfoGlobal.cs -r """) 回答1: The triple-double-quote ( """ ) string literal syntax allows for variable/expression substitution (interpolation), so the backslash ( \ ) is interpreted as a special character "escape". Since the first open paren is not such a special character, Groovy compilation fails. If

问题 I have a Windows.Forms.TextBox that I'd like to allow the user to enter escape sequences that are then interpreted as the character they represent. For example, if the following is entered: Hello\r\nWorld I'd like it to be stored as the character array: H e l l o \r \n W o r l d 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x0D, 0x0A, 0x57, 0x6F, 0x72, 0x6C, 0x64 Thus far, I'm using the following to handle '\r' and '\n', but I'd also like to be able to handle any other escape sequence, like \u001A (ctrl+z),

问题 I'm working with a mysqldump file that has escaped character sequences. I need to know the length of a string as its database value, but the dump has escape characters in it, which add length to the string. I've used stripslashes() which properly un-escapes single- and double-quotes, but it doesn't touch the \r\n . I'm concerned there are other escaped character sequences in there that I'm not aware of. Is there a function I can use that will give me the true length of the string as it would

问题 I have a python dictionary e.g.: [{"pk":"1","name":"John","size":"1/4" "},{},{},etc] That size is 1/4 inch,how would I "escape" that quote? So it still would display it as 1/4", Its a list of things, so I cant just manually code it like 1/4\" , I tried replace('"','\"') EDIT: The orginal list is a textfield in my Django models: [{'pk': '91', 'size': '', 'name': 'Thread Flat For BF', 'quantity': '2'}, {'pk': '90', 'size': '', 'name': 'Blade Holders Straight ', 'quantity': '26'},{'size':'3"',

问题 When searching for underscores in Postgresql, literal use of the character _ doesn't work. For example, if you wanted to search all your tables for any columns that ended in _by , for something like change log or activity information, e.g. updated_by , reviewed_by , etc., the following query almost works: SELECT table_name, column_name FROM information_schema.columns WHERE column_name LIKE '%_by' It basically ignores the underscore completely and returns as if you'd searched for LIKE '%by' .

问题 Typing string.whitespace gives you a string containing all whitespace characters defined by Python's string module: '\t\n\x0b\x0c\r ' Both \x0b and \x0c seem to give a vertical tab. >>> print 'first\x0bsecond' first second \v gives the same effect. How are these three different? Why does the string module use \x0b or \x0c over the simpler \v ? 回答1: \v is \x0b : >>> '\v' '\x0b' but the string literal representation in Python is using the \x0b notation instead. The Python string literal

问题 i need to run following command: ffmpeg -i input.jpg -vf scale="'if(gt(a,4/3),320,-1)':'if(gt(a,4/3),-1,240)'" output_320x240_boxed.png so i execute: cmd = exec.Command("ffmpeg", "-i", "input.jpg", "-vf", "scale=\"'if(gt(a,4/3),640,-1)':'if(gt(a,4/3),-1,300)'\"", "output_320x240_boxed.png") it fails with following error: Error when evaluating the expression 'if(gt(a,4/3),-1,300)"'. Maybe the expression for out_w:'"if(gt(a,4/3),640,-1)' or for out_h:'if(gt(a,4/3),-1,300)"' is self-referencing.

问题 I'm using Jinja2 to create Golang code using Python3. I need to pass some parameters in quotes to a function in my final code, but Jinja2 isn't escaping double quotes. My python code is something like: list_s = ['a', 'b'] string = '\"' + '", "'.join(list_s) + '\"' final_string = 'Function(' + string + ')' print(final_string) template.render({'function': final_string}) My template is: e.({{function}}) What I'm getting in the console (the print in the python code): Function("a", "b") What I

问题 Anyone know of any Perl module to escape text in an XML document? I'm generating XML which will contain text that was entered by the user. I want to correctly handle the text so that the resulting XML is well formed. 回答1: I personally prefer XML::LibXML - Perl binding for libxml. One of the pros - it uses one of the fastest XML processing library available. Here is an example for creating text node: use XML::LibXML; my $doc = XML::LibXML::Document->new('1.0',$some_encoding); my $element =

问题 According to this answer, you can escape a table name by putting double-quotes around it. The SQLite documentation further states that brackets and back-ticks are also possible for compatibility with other systems. This works on tables from the current database, however, when I try to do this on an attached database I get an error: ATTACH db2 AS x; SELECT * FROM "x.table1"; yields the error: no such table: x.table1 If I remove the "x." and run the query directly on database db2, it works. So