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What is the purpose and use of **kwargs?

...Swim(where, why) elif what == 'walk': doWalk(where, why) ... Now you get a new method "drive": elif what == 'drive': doDrive(where, why, vehicle) But wait a minute, there is a new parameter "vehicle" -- you did not know it before. Now you must add it to the signature of the myDo-...
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Difference between DOMContentLoaded and load events

... Fyi, the same MDN link [now] also says: "Note: Stylesheet loads block script execution, so if you have a <script> after a <link rel="stylesheet" ...>, the page will not finish parsing - and DOMContentLoaded will not fire - until the styl...
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Const in JavaScript: when to use it and is it necessary?

...eginning of 2014 and a lot has changed since then. ecmascript-6 support is now the norm. All modern browsers now support const so it should be pretty safe to use without any problems. Original Answer from 2014 Despite having fairly decent browser support, I'd avoid using it for now. From MDN's a...
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How do I expire a PHP session after 30 minutes?

...of the last activity of the user but update that value with every request. Now if the difference of that time to the current time is larger that 1800 seconds, the session has not been used for more than 30 minutes. – Gumbo Aug 9 '10 at 16:37 ...
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Mocking python function based on input arguments

...r easier, could you rename the side_effect function to something else? (i know, i know, it is pretty simple, but improves readability the fact that function name and param name are different :) – Juan Antonio Gomez Moriano Apr 23 '13 at 6:21 ...
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Using CookieContainer with WebClient class

...ed a CookieContainer with HttpWebRequest and HttpWebResponse sessions, but now, I want to use it with a WebClient. As far as I understand, there is no built-in method like there is for HttpWebRequests ( request.CookieContainer ). How can I collect cookies from a WebClient in a CookieContainer? ...
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Safely turning a JSON string into an object

... The jQuery method is now deprecated. Use this method instead: let jsonObject = JSON.parse(jsonString); Original answer using deprecated jQuery functionality: If you're using jQuery just use: jQuery.parseJSON( jsonString ); It's exactly w...
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How to find day of week in php in a specific timezone

... Europe/Stockholm to the users time-zone. $dateTime = new \DateTime( 'now', new \DateTimeZone('Europe/Stockholm') ); $day = $dateTime->format('N'); ISO-8601 numeric representation of the day of the week (added in PHP 5.1.0) 1 (for Monday) through 7 (for Sunday) http://php.net/ma...
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What is a NullReferenceException, and how do I fix it?

... case: string GetCategory(Book b) { if (b == null) return "Unknown"; return b.Category; } Explicitly check for null from method calls and throw a custom exception. You can also throw a custom exception, only to catch it in the calling code: string GetCategory(string bookTitle) { ...
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Recommended way of making React component/div draggable

...nd could probably even wrap it in a nice closure interface, but I want to know if there's a way that meshes with React better. ...