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How to upload, display and save images using node.js and express [closed]
...it so that I don't lose it when I refresh the localhost. This needs to be done using an "Upload" button, which prompts for a file-selection.
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What is android:weightSum in android, and how does it work?
... the sum of the weights inside the layout accomplishes nothing, but if someone changes it in the future it could cause headaches as now there is an unnecessary modifier to the layout that would have to be found and changed. This answer is incorrect and should not be the accepted answer.
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How expensive is RTTI?
...ig is it? Everywhere I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed.
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How to “properly” create a custom object in JavaScript?
...potential features you might consider desirable in an object system and no-one really agrees on one particular formula.
The closure way, then. This avoids the problems of JavaScript's prototype-based inheritance, by not using inheritance at all. Instead:
function Shape(x, y) {
var that= this...
MVVM in WPF - How to alert ViewModel of changes in Model… or should I?
...elCopyOfSomeProperty");
}
But typically this is only needed if more than one object will be making changes to the Model's data, which is not usually the case.
If you ever have a case where you don't actually have a reference to your Model property to attach the PropertyChanged event to it, then y...
How do you declare an interface in C++?
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To expand on the answer by bradtgmurray, you may want to make one exception to the pure virtual method list of your interface by adding a virtual destructor. This allows you to pass pointer ownership to another party without exposing the concrete derived class. The destructor doesn't ha...
Why return NotImplemented instead of raising NotImplementedError
...mented doesn't get raised and can be used in further tests.
http://jcalderone.livejournal.com/32837.html
To summarise that link:
"NotImplemented signals to the runtime that it should ask someone else to satisfy the operation. In the expression a == b, if a.__eq__(b) returns NotImplemented, the...
How to detect duplicate values in PHP array?
I am working with a one dimensional array in PHP. I would like to detect the presence of duplicate values, then count the number of duplicate values and out put the results. For example, given the following array:
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How to format a DateTime in PowerShell
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One thing you could do is:
$date.ToString("yyyyMMdd")
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What does “Git push non-fast-forward updates were rejected” mean?
...er branch do not agree on something.
Some change was pushed/committed to one that is not in the other.
Fire up gitk --all, and it should give you a clue as to what went wrong - look for "forks" in the history.
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