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Javascript reduce on array of objects
Say I want to sum a.x for each element in arr .
15 Answers
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Android: Background Image Size (in Pixel) which Support All Devices
...y App is full screen. I am confused in Creating graphics. can any one tell me the best sizes of my background image in pixels.
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How exactly does tail recursion work?
...l recursion. I only don't understand why it doesn't require stack to remember its return address.
8 Answers
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How can I pass parameters to a partial view in mvc 4
...tion is hard to understand, but if I'm getting the gist, you simply have some value in your main view that you want to access in a partial being rendered in that view.
If you just render a partial with just the partial name:
@Html.Partial("_SomePartial")
It will actually pass your model as an im...
How to POST JSON Data With PHP cURL?
... are not json-encoding all of the POST data -- only the value of the "customer" POST field. Instead, do something like this:
$ch = curl_init( $url );
# Setup request to send json via POST.
$payload = json_encode( array( "customer"=> $data ) );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $payload );
c...
Difference between filter and filter_by in SQLAlchemy
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filter_by is used for simple queries on the column names using regular kwargs, like
db.users.filter_by(name='Joe')
The same can be accomplished with filter, not using kwargs, but instead using the '==' equality operator, which has been overloaded on the db.users.name object:
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What is __gxx_personality_v0 for?
This is a second-hand question from an OS development site, but it made me curious since I couldn't find a decent explanation anywhere.
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Why do I get a warning every time I use malloc?
... don't do that, the compiler thinks you want to define your own function named malloc and it warns you because:
You don't explicitly declare it and
There already is a built-in function by that name which has a different signature than the one that was implicitly declared (when a function is declar...
Regular expression for first and last name
For website validation purposes, I need first name and last name validation.
23 Answers
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UnboundLocalError on local variable when reassigned after first use
...n, it is treated by default as a local variable. Therefore, when you uncomment the line you are trying to reference the local variable c before any value has been assigned to it.
If you want the variable c to refer to the global c = 3 assigned before the function, put
global c
as the first line...