escaping

I'm sending regular expressions to CloudKit as a String value and it doesn't seem to like it, replacing \\ by \ . However, once I'm getting this value from my app I would like to retransform it in its original form, with \\ instead of \ . I don't know how to manage this kind of escaped characters in Swift because I cannot even set a String with a \ in my code but I'm still able to manage them when getting them from CloudKit. Here is an example of String: var onlyOneBackslash: String = valueFromCloudKit print(onlyOneBackslash) // booking\.com How to escape the backslash to transform booking\

I have a JSON string that looks as below '{\"test\":{\"test1\":{\"test1\":[{\"test2\":\"1\",\"test3\": \"foo\",\"test4\":\"bar\",\"test5\":\"test7\"}]}}}' I need to change it to the one below using Ruby or Rails: '{"test":{"test1":{"test1":[{"test2":"1","test3": "foo","test4":"bar","test5":"bar2"}]}}}' I need to know how to remove those slashes. Use Ruby's String#delete! method. For example: str = '{\"test\":{\"test1\":{\"test1\":[{\"test2\":\"1\",\"test3\": \"foo\",\"test4\":\"bar\",\"test5\":\"test7\"}]}}}' str.delete! '\\' puts str #=> {"test":{"test1":{"test1":[{"test2":"1","test3": "foo",

I'm trying use StringFormat to insert apostrophies (apostrophe's?) around a value that is bound to a TextBlock: <TextBlock Text="{Binding MyValue, StringFormat='The value is &apos;{0}&apos;'}"/> However, I get a compile error: Names and Values in a MarkupExtension cannot contain quotes. The MarkupExtension arguments ' MyValue, StringFormat='The value is '{0}''}' are not valid. I do notice that it does work for quotes though: <TextBlock Text="{Binding MyValue, StringFormat='The value is "{0}"'}"/> Is this a bug with StringFormat? I'm not sure if it's a bug, but I tested this method, and it

What is the name and function of the \c escape character in Bash? What is its numeric value? I have seen that \cx is a control character, but what about plain \c ? It seems that: echo -e "Hello World\c" and echo -en "Hello World" are equivalent. However, Python doesn't use it as an escape character, and it is missing from all of the lists of escape characters I found. Is this a Bash-specific behavior? That's actually specific to some versions of echo (I'm pretty sure that \c came from SysV while the -n version was a BSD-ism). It simply means don't output the trailing newline. See the echo man

I am having problems when trying to use a rails variable within javascript code. For example, I might define a link_to_remote, with parameter :complete => "alert('my_var');" If my_var = "I'm testing." , then the javascript code will break due to the single quote closing the code prematurely. If I try using escape_javascript(my_var) so that the quote gets turned into \' , it doesn't seem to fix the problem. I've noticed that when you try alert('I\'m testing'); there's a problem, but if you do alert('I\\'m testing') , it works. Since escape_javascript only turns ' into \' , rather than \\' ,