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Specify custom Date format for colClasses argument in read.table/read.csv

... You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses. Try: setAs("character","myDate", function(from) as.Date(from, for...
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How to check if a table contains an element in Lua?

...r function is as efficient as can be done. Of course, as noted by others (and as practiced in languages older than Lua), the solution to your real problem is to change representation. When you have tables and you want sets, you turn tables into sets by using the set element as the key and true as ...
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When do you need to explicitly call a superclass constructor?

...Well there's a difference between requiring the constructor to be present, and requiring an explicit delegation to the parameterless super-constructor. The latter is a matter of style - whether you prefer to be explicit/obvious or brief. – Jon Skeet Dec 11 '17 ...
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How can I obfuscate (protect) JavaScript? [closed]

I want to make a JavaScript application that's not open source, and thus I wish to learn how to can obfuscate my JS code? Is this possible? ...
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Remove duplicate rows in MySQL

... The aforementioned bug @DarkMantis referred to and it's solution. – Jordan Arseno Jan 23 '13 at 20:47 ...
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How to get name of exception that was caught in Python?

... postfix: "", imageUploader: { 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....
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Make virtualenv inherit specific packages from your global site-packages

...ent with virtualenv --system-site-packages . Then, activate the virtualenv and when you want things installed in the virtualenv rather than the system python, use pip install --ignore-installed or pip install -I . That way pip will install what you've requested locally even though a system-wide vers...
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Check if array is empty or null

...hat you want. There are a lot of ways to clean up your code to be simpler and more readable. Here's a cleaned up version with notes about what I cleaned up. var album_text = []; $("input[name='album_text[]']").each(function() { var value = $(this).val(); if (value) { album_text.p...
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from jquery $.ajax to angular $http

...ethod) AngularJS will take care of converting JS objects into JSON string and setting headers (those are customizable) Callback functions are named success and error respectively (also please note parameters of each callback) - Deprecated in angular v1.5 use then function instead. More info of the...
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How to detect my browser version and operating system using JavaScript?

I have tried using the code below but it only display results in Chrome and Mozilla not working in IE6. 10 Answers ...