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How to add image to canvas
...ument.getElementById('viewport'),
context = canvas.getContext('2d');
make_base();
function make_base()
{
base_image = new Image();
base_image.src = 'img/base.png';
base_image.onload = function(){
context.drawImage(base_image, 0, 0);
}
}
I.e. draw the image in the onload callback of t...
XPath to select element based on childs child value
Trying to select an element based on the value of one of it's childrens childrens
1 Answer
...
SQL JOIN and different types of JOINs
...re similar, if you are not bothered which is the primary table the join is based on.
– Anup
Oct 12 '14 at 11:37
2
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How to filter git diff based on file extensions?
...anch had additional files not present in the other branch (thus the 'find' based ones are remiss).
Anyway this worked for me (in my example, looking for a diff between python files):
git diff branch1 branch2 -- `git diff --summary branch1 branch2 | egrep '\.py$' | cut -d ' ' -f 5`
...
Difference between a Message Broker and an ESB
...he one area, other stronger in another. Perhaps a choice needs to be made based on which function best covers an individual problem.
A broker may have better built-in "lego blocks" for constructing a transformation chain than an ESB product does. A broker pressed into service as an ESB may be cru...
How to delete an array element based on key? [duplicate]
For instance,
3 Answers
3
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How does `is_base_of` work?
...
If they are related
Let's for a moment assume that B is actually a base of D. Then for the call to check, both versions are viable because Host can be converted to D* and B*. It's a user defined conversion sequence as described by 13.3.3.1.2 from Host<B, D> to D* and B* respectively. F...
Difference between web reference and service reference?
...rs indicate that it is only ASMX, but Web References can also talk to Java-based Web Services or Python-based or Ruby so long as they all talk WSDL and conform to the WS-I interoperability standard).
A Service Reference will create a client proxy class that communicates with a WCF-based service : r...
Why are C# interface methods not declared abstract or virtual?
...onsider this weird case:
interface MyInterface {
void Method();
}
class Base {
public void Method();
}
class Derived : Base, MyInterface { }
If Base and Derived are declared in the same assembly, the compiler will make Base::Method virtual and sealed (in the CIL), even though Base doesn't imp...
Measure elapsed time in Swift
...our NSDate code entirely: it's totally unreliable to use NSDate: NSDate is based on system clock, which can change at any time due to many different reasons, such as network time sync (NTP) updating the clock (happens often to adjust for drift), DST adjustments, leap seconds, and user manual adjustm...