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How to check for a valid Base64 encoded string

...lic static bool IsBase64(this string base64String) { // Credit: oybek https://stackoverflow.com/users/794764/oybek if (string.IsNullOrEmpty(base64String) || base64String.Length % 4 != 0 || base64String.Contains(" ") || base64String.Contains("\t") || base64String.Contains("\r") || b...
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In PHP, why does not show a parse error?

...eUploader: { brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
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WPF chart controls [closed]

...e platforms -WPF -Silverlight -WinRT -Windows phone -Windows Forms -Mono https://sparrowtoolkit.codeplex.com/ share | improve this answer | follow | ...
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Detect if Android device has Internet connection

...king() { boolean success = false; try { URL url = new URL("https://google.com"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setConnectTimeout(10000); connection.connect(); success = connection.getResponseCode() ...
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print call stack in C or C++

... Boost stacktrace Documented at: https://www.boost.org/doc/libs/1_66_0/doc/html/stacktrace/getting_started.html#stacktrace.getting_started.how_to_print_current_call_stack This is the most convenient option I've seen so far, because it: can actually print ...
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How to get HTML 5 input type=“date” working in Firefox and/or IE 10

...et) To activate it: about:config dom.forms.datetime -> set to true https://developer.mozilla.org/en-US/Firefox/Experimental_features share | improve this answer | fol...
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System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second

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Can I set an opacity only to the background image of a div?

...absolute; top: 0; bottom: 0; left: 0; right: 0; background: url('https://static.pexels.com/photos/6644/sea-water-ocean-waves.jpg') center center; opacity: .4; width: 100%; height: 100%; } https://jsfiddle.net/abalter/3te9fjL5/ ...
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Html.RenderPartial() syntax with Razor

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IIS - 401.3 - Unauthorized

... Try this solution: https://serverfault.com/questions/38222/iis-7-5-windows-7-http-error-401-3-unauthorized Also check if the user running the IIS AppPool has read access to that folder/file. Have a look at this: http://www.iis.net/learn/mana...