escaping | 易学教程

Unescape apostrophe (') in JavaScript?

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问题 I'm trying to unescape a HTML-escaped apostrophe ( "'" ) in JavaScript, but the following doesn't seem to work on a devtools console line: unescape('''); The output is simply: "'" It doesn't work in Underscore's unescape either: _.unescape(''') What am I doing wrong? 回答1: unescape has nothing to do with HTML character entities. It's an old, deprecated function for decoding text encoded with escape , which is an old, deprecated function for encoding text in a way that is unlikely to be useful

Triple single quote vs triple double quote in Ruby

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问题 Why might you use ''' instead of """ , as in Learn Ruby the Hard Way, Chapter 10 Study Drills? 回答1: There are no triple quotes in Ruby. Two String literals which are juxtaposed are parsed as a single String literal. So, 'Hello' 'World' is the same as 'HelloWorld' And '' 'Hello' '' is the same as '''Hello''' is the same as 'Hello' There are no special rules for triple single quotes vs. triple double quotes, because there are no triple quotes. The rules are simply the same as for quotes. 回答2: I

Do not escape html stored as string (execute or process html string) [closed]

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In PHP (Wordpress theme function, trying to add html stored in theme options to blog header), I'm trying to get the following line: $x="html"; echo $x; To render html just like: echo "html"; The results are different, the first one will display html tags while the second will process the html. Can someone please help. Thanks csi Use single quotes Single quotes vs double quotes in PHP echo 'HTML'; A. If you want to show the HTML Tags you can just use htmlentities Example $x = "html"; echo htmlentities($x); Output html B. If you want the the other way round its

Decode HTML escaped characters back to normal string in C#

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My question is simple. I searched a little online, but could not find a quick way to unescape HTML text in a string. For example: "< > &" should be returned to "< > &" as a string. Is there a quick way, or do I have to write my own unescaper? use System.Web.HttpUtility.HtmlDecode or System.Net.WebUtility.HtmlDecode var decoded = HttpUtility.HtmlDecode("< > &"); If you're using .NET 4.5 then you can use the HttpUtility.HtmlDecode method. Usman Younas HttpUtility.UrlDecode("Your escaped String", System.Text.Encoding.Default); 来源： https://stackoverflow.com/questions/15955646/decode-html-escaped

Do you only run htmlspecialchars() on output or is there other functionality you also do?

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问题 When outputting user input, do you only use htmlspecialchars() or are there are functions/actions/methods you also run? I'm looking for something that will also deal with XSS. I'm wondering if I should write a function that escapes user input on output or just use htmlspecialchars() . I'm looking for the generic cases, not the specific cases that can be dealt with individually. 回答1: I usually use htmlspecialchars($var, ENT_QUOTES) on input fields. I created a method that does this because i

Escape special characters in mount command

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I am trying to mount a windows shared folder on Mac OSX Mavericks. A simplistic user name and password worked fine mount -t smbfs //user2:password2@server1.mydomain.com/myproject ~/localmap On trying out the more valid user name and password I am getting errors that parsing URL failed. The details are Username: mydomain\user1 Password: A%b$c@d!e#f The command tried is mount -t smbfs //mydomain\user1:A%b\$c\@d\!e#f@server1.mydomain.com/myproject ~/localmap Based on what I found, $ and ! needs to be escaped. Need help on how to escape the special characters. Incidentally, using only the username

Explain Backslash in C

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问题 Can anyone please explain the below code and please also explain the role of backslash( \ ) in such situations. And what \' , \" , \ooo , \ \ , \? means? #include <stdio.h> int main(){ char a = '\010'; char y = '010'; printf("%d,%d",a,y); return 0; } output: 8,48 回答1: This '\010' is a octal escape sequence 10 in octal is 8 in decimal and it will be promoted to an int when calling printf so that explains that value. This '010' is a multi-character constant and it's value is implementation

How can regex ignore escaped-quotes when matching strings?

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问题 I'm trying to write a regex that will match everything BUT an apostrophe that has not been escaped. Consider the following: <?php $s = 'Hi everyone, we\'re ready now.'; ?> My goal is to write a regular expression that will essentially match the string portion of that. I'm thinking of something such as /.*'([^']).*/ in order to match a simple string, but I've been trying to figure out how to get a negative lookbehind working on that apostrophe to ensure that it is not preceded by a backslash..

Does C support raw string literals?

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C++11 added support for raw string literals, such as: R"foo(A " weird \" string)foo" Does C have such a thing? If so, in what version of the standard? C11? If not, does anyone know if it is being planed and if any compilers support it? Does C have such a thing? If so, in what version of the standard? C11? C (C90, C99, C11) does not support this feature or any other similar feature. If not, does anyone know if it is being planed I have no idea, but usually there is a strong resistance of C committee to include new features in C. and if any compilers support it? I just tested it and it is

Escape status within a string literal as argument of `String#tr`

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问题 There is something mysterious to me about the escape status of a backslash within a single quoted string literal as argument of String#tr . Can you explain the contrast between the three examples below? I particularly do not understand the second one. To avoid complication, I am using 'd' here, which does not change the meaning when escaped in double quotation ( "\d" = "d" ). '\\'.tr('\\', 'x') #=> "x" '\\'.tr('\\d', 'x') #=> "\\" '\\'.tr('\\\d', 'x') #=> "x" 回答1: Escaping in tr The first