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When to use setAttribute vs .attribute= in JavaScript?
...andard attributes.
Example:
node.className = 'test'; // works
node.frameborder = '0'; // doesn't work - non standard attribute
node.setAttribute('frameborder', '0'); // works
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How do you set, clear, and toggle a single bit?
...e always found using bitfields is a bad idea. You have no control over the order in which bits are allocated (from the top or the bottom), which makes it impossible to serialize the value in a stable/portable way except bit-at-a-time. It's also impossible to mix DIY bit arithmetic with bitfields, fo...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
扩展App Inventor:具有多点触控和手势检测功能 · App Inventor 2 中文网
...his event, so it detects the rotation even when we do not intend it to. In order to solve this problem, we add a buffer when we detect $MotionEvent.ACTION_MOVE$, so that we only fire “rotation” when the positions of two fingers change above some threshold.
Figure 6. Block designed for Rotatio...
Converting BigDecimal to Integer
...very specific need for the wrap around that happens when you drop the high-order bits.
Given those params, intValueExact() throws an exception when we don't want it to if our fractional part is non-zero. On the other hand, intValue() doesn't throw an exception when it should if our BigDecimal is ...
What is the performance cost of having a virtual method in a C++ class?
...
I ran some timings on a 3ghz in-order PowerPC processor. On that architecture, a virtual function call costs 7 nanoseconds longer than a direct (non-virtual) function call.
So, not really worth worrying about the cost unless the function is something lik...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...with a Perl array.
Note: The directories are unshifted onto @INC in the order listed in this answer, e.g. default @INC is last in the list, preceded by PERL5LIB, preceded by -I, preceded by use lib and direct @INC manipulation, the latter two mixed in whichever order they are in Perl code.
Refer...
Is there a constraint that restricts my generic method to numeric types?
...t for every type you like and use that accordingly (at compile time!).
In order to do this:
Create a new Text Template file called GenericNumberMethodTemplate.tt.
Remove the auto-generated code (you'll keep most of it, but some isn't needed).
Add the following snippet:
<#@ template languag...
