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How to check if a variable exists in a FreeMarker template?

...me is null, the result if null would be: Hi , How are you? if_exists is now deprecated and has been replaced with the default operator ! as in Hi ${userName!}, How are you? the default operator also supports a default value, such as: Hi ${userName!"John Doe"}, How are you? ...
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Why can't I define a default constructor for a struct in .NET?

...n C# is "the default value for any type can't rely on any initialization". Now they could have allowed parameterless constructors to be defined, but then not required that constructor to be executed in all cases - but that would have led to more confusion. (Or at least, so I believe the argument goe...
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CSS/HTML: What is the correct way to make text italic?

... @Jukka I'm sure it was in there at some point. Nonetheless it's not there now so I've updated my answer. – DisgruntledGoat Sep 1 '14 at 22:14 ...
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how to check if List element contains an item with a Particular Property Value

...ists pricePublicModel.Size == 200 ? Also, if this element exists, how to know which one it is? 6 Answers ...
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Fit background image to div

... You can achieve this with the background-size property, which is now supported by most browsers. To scale the background image to fit inside the div: background-size: contain; To scale the background image to cover the whole div: background-size: cover; JSFiddle example There also ...
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jQuery: select all elements of a given class, except for a particular Id

... may have been possible when I posted the original answer, but adding this now anyway): document.querySelectorAll(".myClass:not(#myId)").forEach((el,i) => { doSomething(el); }); This gets rid of the Array.from usage. document.querySelectorAll returns a NodeList. Read here to know more abo...
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Select between two dates with Django

...56677 It's an arbitrary field in a model. You can set the DateField's auto_now_add parameter to True in order to have it easily. – Benbb96 Mar 26 '18 at 13:28 add a comment ...
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How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app

...osoft.AspNet.Web.Optimization The Microsoft.Web.Optimization package is now obsolete. With ASP.NET (MVC) 4 and higher you should install the Microsoft ASP.NET Web Optimization Framework: Install the package from nuget: Install-Package Microsoft.AspNet.Web.Optimization Create and configure bun...
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How do I escape spaces in path for scp copy in Linux?

I'm new to linux, I want to copy a file from remote to local system... now I'm using scp command in linux system.. I have some folders or files names are with spaces, when I try to copy that file, it shows the error message: "No such file or directory" ...
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PowerShell says “execution of scripts is disabled on this system.”

... Get-ExecutionPolicy does not show all the scopes. Import-Module SQLPS is now working with policies changed as follows: {Undefined- Process,MachinePolicy,UserPolicy,}; {RemoteSigned- CurrentUser, LocalMachine}. – SherlockSpreadsheets Feb 1 '19 at 17:45 ...