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Unable to import a module that is definitely installed
... Not quite true, @MartijnPieters: if there was an import of the form "from <package> import <foo>", and if the obstructing package had no "foo", then you'd get an import error for option 3.
– Dan H
Apr 26 '16 at 21:38
...
Forward declaration of a typedef in C++
...clared type. Multiple identical typedefs are acceptable by compiler.
long form:
class MyClass;
typedef MyClass myclass_t;
short form:
typedef class MyClass myclass_t;
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Why use multiple columns as primary keys (composite primary key)
...ther silly because it is redundant. And slower.
– PerformanceDBA
Feb 17 '19 at 12:57
2
The "great...
How to set a selected option of a dropdown list control using angular JS
...selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$scope.selectedOption = $scope.options[1];
HTML:
<select data-ng-options="o.name for o in opt...
Event on a disabled input
...d make the field readonly and on submit disable all readonly fields
$(".myform").submit(function(e) {
$("input[readonly]", this).attr("disabled", true);
});
and the input (+ script) should be
<input type="text" readonly="readonly" name="test" value="test" />
$('input[readonly]').click...
ListBox vs. ListView - how to choose for data binding
...s view"). It's basically the multi-column listbox, the cousin of windows form's listview.
If you don't need the additional capabilities of ListView, you can certainly use ListBox if you're simply showing a list of items (Even if the template is complex).
...
Replace words in the body text
...e javascript to automate collecting databases, images, videos, filling web forms, upload, may be to work with excel. Applescript is ok with it but java is seem to be a whole new level and much more better. What should I start with in order to achieve my purposes. I know 0 about javascript and I dont...
Convert any object to a byte[]
...
Use the BinaryFormatter:
byte[] ObjectToByteArray(object obj)
{
if(obj == null)
return null;
BinaryFormatter bf = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
bf.Serialize(ms, obj);...
Entity Framework 5 Updating a Record
... You won't receive an error because those fields won't be in your form. You leave out the fields you will definitely not be updating, grab the entry from the database using the form passed back by attaching it, and tell the entry that those fields aren't being modified. Model validation i...
What is the difference between a “function” and a “procedure”?
...lue. They behave differently wrt. the language syntax (eg. procedure calls form statements; you cannot use a procedure call inside an expression vs. function calls don't form statements, you must use them in other statements). Therefore, Pascal-bred programmers differentiate between those.
In C-lik...