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How do I check (at runtime) if one class is a subclass of another?
Let's say that I have a class Suit and four subclasses of suit: Heart, Spade, Diamond, Club.
9 Answers
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dyld: Library not loaded … Reason: Image not found
...libSystem.B.dylib (compatibility version 1.0.0, current version 169.3.0)
and for each libboost_xxx.dylib, do:
$ install_name_tool -change @executable_path/libboost_something.dylib /opt/local/lib/libboost_something.dylib exefile
and finally verify using otool again:
$ otool -L exefile
exefile:
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How do you represent a JSON array of strings?
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I'll elaborate a bit more on ChrisR awesome answer and bring images from his awesome reference.
A valid JSON always starts with either curly braces { or square brackets [, nothing else.
{ will start an object:
{ "key": value, "another key": value }
Hint: although javascrip...
How to check if an array field contains a unique value or another array in MongoDB?
...n the help: mongodb.org/display/DOCS/…
– Scott Hernandez
Mar 20 '11 at 4:31
2
for the $all does...
Difference between Ctrl+Shift+F and Ctrl+I in Eclipse
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If you press CTRL + I it will just format tabs/whitespaces in code and pressing CTRL + SHIFT + F format all code that is format tabs/whitespaces and also divide code lines in a way that it is visible without horizontal scroll.
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Where is the 'tests output pane'?
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Go to the view tab at the top of your screen, and select output.
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How to remove “disabled” attribute using jQuery?
I have to disable inputs at first and then on click of a link to enable them.
10 Answers
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How can I enable zoom in on UIWebView which inside the UIScrollView?
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You MUST set scalesPageToFit=YES for any pinching and zooming to work on a UIWebView
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Does Internet Explorer support pushState and replaceState?
Does anybody know if Internet Explorer supports the history.pushState() and history.replaceState() methods for manipulating browser history ? Considering these are just being implemented in Firefox 4, I'm not holding my breath, but does anybody know if they're coming in IE9?
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Create numpy matrix filled with NaNs
...oops for vector operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed the alte...