You can do it for a const reference, but not for a non-const one. This is because C++ does not allow a temporary (the default value in this case) to be bound to non-const reference. One way round this would be to use an actual instance as the default: static int AVAL = 1; void … Read more
You can do it by manually edit code first migration: public override void Up() { AddColumn(“dbo.Events”, “Active”, c => c.Boolean(nullable: false, defaultValue: true)); }
No, it is not possible (before PHP 8.0): if you want to pass the third parameter, you have to pass the second one. And named parameters are not possible either. A “solution” would be to use only one parameter, an array, and always pass it… But don’t always define everything in it. For instance : … Read more
Use the for attribute of label for input. <div> <label for=”files” class=”btn”>Select Image</label> <input id=”files” style=”visibility:hidden;” type=”file”> </div> Below is the code to fetch name of the uploaded file $(“#files”).change(function() { filename = this.files[0].name; console.log(filename); }); <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <div> <label for=”files” class=”btn”>Select Image</label> <input id=”files” style=”visibility:hidden;” type=”file”> </div>
Using the syntax that you used, int array[100] = {-1}; says “set the first element to -1 and the rest to 0” since all omitted elements are set to 0. In C++, to set them all to -1, you can use something like std::fill_n (from <algorithm>): std::fill_n(array, 100, -1); In portable C, you have to … Read more
Usually, a Python dictionary throws a KeyError if you try to get an item with a key that is not currently in the dictionary. The defaultdict in contrast will simply create any items that you try to access (provided of course they do not exist yet). To create such a “default” item, it calls the … Read more
The member is private, you get the error where you’re trying to print it, outside of the class. Simple enough, first all of the default values are assigned (constructed, see comment), then the code inside the constructor is executed. That’s why you see the 5 inside the constructor. If you want the constructor to change … Read more