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What are enums and why are they useful?

... You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values. Examples would be things like type constants (contract status: "permanent", "temp", "apprentice"), or flags ("execute now", "defer execution"). If you use e...
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How do I parse command line arguments in Bash?

...t argument ;; esac done set -- "${POSITIONAL[@]}" # restore positional parameters echo "FILE EXTENSION = ${EXTENSION}" echo "SEARCH PATH = ${SEARCHPATH}" echo "LIBRARY PATH = ${LIBPATH}" echo "DEFAULT = ${DEFAULT}" echo "Number files in SEARCH PATH with EXTENSION:" $(ls -1 "${SE...
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How can you integrate a custom file browser/uploader with CKEditor?

...ndowHeight : 500 }); </script> Your custom code will receive a GET parameter called CKEditorFuncNum. Save it - that's your callback function. Let's say you put it into $callback. When someone selects a file, run this JavaScript to inform CKEditor which file was selected: window.opener.CKED...
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How to check file MIME type with javascript before upload?

...d the mime type based on the signature of the first bytes of the file * @param {File} file A instance of File * @param {Function} callback Callback with the result * @author Victor www.vitim.us * @date 2017-03-23 */ function loadMime(file, callback) { //List of kn...
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How to calculate the difference between two dates using PHP?

...omponent (years, months, etc) * That component won't be displayed. * * @param DateInterval $interval The interval * * @return string Formatted interval string. */ function format_interval(DateInterval $interval) { $result = ""; if ($interval->y) { $result .= $interval->format("%y...
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How to secure an ASP.NET Web API [closed]

... RequestMethod = request.Method.ToString(), QueryParameters = request.GetQueryNameValuePairs() .ToNameValueCollection(), }; if (request.Content != null) { var contentResult = request.Content.ReadAsByteArrayAsync(...
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What is the difference between named and positional parameters in Dart?

Dart supports both named optional parameters and positional optional parameters. What are the differences between the two? ...
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How can I dynamically create derived classes from a base class

... This bit of code allows you to create new classes with dynamic names and parameter names. The parameter verification in __init__ just does not allow unknown parameters, if you need other verifications, like type, or that they are mandatory, just add the logic there: class BaseClass(object): ...
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Best way to get child nodes

...ith nodeType ELEMENT_NODE. /** * Return direct children elements. * * @param {HTMLElement} * @return {Array} */ function elementChildren (element) { var childNodes = element.childNodes, children = [], i = childNodes.length; while (i--) { if (childNodes[i].nodeT...
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.NET NewtonSoft JSON deserialize map to a different property name

... JsonProperty control everything. /// </summary> /// <typeparam name="T"></typeparam> public class IgnoreJsonPropertyResolver<T> : DefaultContractResolver { private Dictionary<string, string> PropertyMappings { get; set; } public IgnoreJ...