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How do I remove a file from the FileList
I'm building a drag-and-drop-to-upload web application using HTML5, and I'm dropping the files onto a div and of course fetching the dataTransfer object, which gives me the FileList .
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Get last record in a queryset
...no real
effect (the ordering was undefined
prior to calling reverse(), and will
remain undefined afterward).
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Performance optimization strategies of last resort [closed]
...ite already, but it occurs to me that almost all are very problem-specific and fairly narrow. And almost all repeat the advice to avoid premature optimization.
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Why use multiple columns as primary keys (composite primary key)
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Your understanding is correct.
You would do this in many cases. One example is in a relationship like OrderHeader and OrderDetail. The PK in OrderHeader might be OrderNumber. The PK in OrderDetail might be OrderNumber AND LineNumber. ...
IntelliJ Split Window Navigation
...re in separate tab groups I can't. I've searched through the key mappings and have not found one that seems to accomplish this. I know I can use the mouse, but I'm trying to find ways to avoid the mouse and stay with the keyboard.
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Why use argparse rather than optparse?
I noticed that the Python 2.7 documentation includes yet another command-line parsing module. In addition to getopt and optparse we now have argparse .
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Switch branch names in git
...s question, so here's a desciption of the problem. I was working on master and committed some stuff and then decided I wanted to put that work on hold. I backed up a few commits and then branched from before I started my crap work. Practically this works fine, I just now have a different branch as m...
Update parent scope variable in AngularJS
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You need to use an object (not a primitive) in the parent scope and then you will be able to update it directly from the child scope
Parent:
app.controller('ctrlParent',function($scope){
$scope.parentprimitive = "someprimitive";
$scope.parentobj = {};
$scope.parentobj.parent...
Moving decimal places over in a double
...Decimal.
The problem you have is that 0.1 is not an exact representation, and by performing the calculation twice, you are compounding that error.
However, 100 can be represented accurately, so try:
double x = 1234;
x /= 100;
System.out.println(x);
which prints:
12.34
This works because Doub...
How do I apply a perspective transform to a UIView?
...ws] objectAtIndex:0];
CALayer *layer = myView.layer;
CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -500;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 45.0f * M_PI / 180.0f, 0.0f, 1.0f, 0.0f...