32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
# Find quoted strings
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Create a regexp to find strings in double quotes `subject:"..."`.
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The strings should support escaping, the same way as JavaScript strings do. For instance, quotes can be inserted as `subject:\"` a newline as `subject:\n`, and the backslash itself as `subject:\\`.
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```js
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let str = "Just like \"here\".";
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```
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Please note, in particular, that an escaped quote `subject:\"` does not end a string.
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So we should search from one quote to the other ignoring escaped quotes on the way.
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That's the essential part of the task, otherwise it would be trivial.
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Examples of strings to match:
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```js
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.. *!*"test me"*/!* ..
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.. *!*"Say \"Hello\"!"*/!* ... (escaped quotes inside)
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.. *!*"\\"*/!* .. (double backslash inside)
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.. *!*"\\ \""*/!* .. (double backslash and an escaped quote inside)
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```
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In JavaScript we need to double the backslashes to pass them right into the string, like this:
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```js run
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let str = ' .. "test me" .. "Say \\"Hello\\"!" .. "\\\\ \\"" .. ';
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// the in-memory string
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alert(str); // .. "test me" .. "Say \"Hello\"!" .. "\\ \"" ..
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```
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