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Regex - Should hyphens be escaped? [duplicate]

...hese cases, you'll typically see everything escaped (e.g. [a-z\%\$\#\@\!\-\_]) simply because the engineer doesn't know what's "special" and what's not... so they "play it safe" and obfuscate the expression with loads of excessive backslashes. You'll be doing yourself, your contemporaries, and your ...
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What characters are valid for JavaScript variable names?

...mmarizing the relevant spec sections: An identifier must start with $, _, or any character in the Unicode categories “Uppercase letter (Lu)”, “Lowercase letter (Ll)”, “Titlecase letter (Lt)”, “Modifier letter (Lm)”, “Other letter (Lo)”, or “Letter number (Nl)”. The r...
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Google Maps API 3 - Custom marker color for default (dot) marker

...Google charts api with the urls: http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=%E2%80%A2|FE7569 Which looks like this: the image is 21x34 pixels and the pin tip is at position (10, 34) And you'll also want a separate shadow image (so that it doesn't overlap nearby icons): h...
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Get fragment (value after hash '#') from a URL in php [closed]

...as this value is never sent to the server (hence it won't be available in $_SERVER["REQUEST_URI"] or similar predefined variables). You would need some sort of JavaScript magic on the client side, e.g. to include this value as a POST parameter. If it's only about parsing a known URL from whatever s...
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Is there a way to make npm install (the command) to work behind proxy?

...ointed out that you may get NPM to work behind a proxy by setting BOTH HTTP_PROXY and HTTPS_PROXY environment variables, then issuing normally the command npm install express (for example) EDIT2: As @BStruthers commented, keep in mind that passwords containing "@" wont be parsed correctly, if cont...
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maximum value of int

... In C++: #include <limits> then use int imin = std::numeric_limits<int>::min(); // minimum value int imax = std::numeric_limits<int>::max(); std::numeric_limits is a template type which can be instantiated with other types: float fmin = std::numeric_limits<float>...
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Annotating text on individual facet in ggplot2

... Typically you'd do something like this: ann_text <- data.frame(mpg = 15,wt = 5,lab = "Text", cyl = factor(8,levels = c("4","6","8"))) p + geom_text(data = ann_text,label = "Text") It should work without specifying the factor variable comple...
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Openssl is not recognized as an internal or external command

...ple, if the file is unzipped to the location C:\Users\gaurav\openssl-0.9.8k_WIN32, then copy the path C:\Users\gaurav\openssl-0.9.8k_WIN32\bin. Step 3 Add the path to your system environment path. After your PATH environment variable is set, open the cmd and type this command: C:\>keytool -expor...
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UIWebView open links in Safari

...false } return true } Swift 3 version: func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool { if navigationType == UIWebViewNavigationType.linkClicked { UIApplication.shared.openURL(request....
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Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails

I want my urls to use dash - instead of underscore _ as word separators. For example controller/my-action instead of controller/my_action . ...