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Ruby custom error classes: inheritance of the message attribute
...
Given what the ruby core documentation of Exception, from which all other errors inherit, states about #message
Returns the result of invoking exception.to_s. Normally this returns
the exception’s message or name. By supplying a to_str method,
exceptions are agreeing ...
Understanding Fragment's setRetainInstance(boolean)
... to saved orientation changing Time.Say I have download a bunch of Bitmaps from server and each one is 1MB, when the user accidentally rotate his device, I certainly don't want to do all the download work again.So I create a Fragment holding my bitmaps and add it to the manager and call setRetainIns...
Multiline strings in JSON
...eCanvas')></button>"
],
}
This looks quite neat to me, appart from that I have to use double quotes everywhere. Though otherwise, I could, perhaps, use YAML, but that has other pitfalls and is not supported natively. Once parsed, I just use myData.modify_head.join('\n') or myData.modify...
How many parameters are too many? [closed]
...le the x,y,w and h as a rectangle) and there's also the parameters derived from the class name as well. How would you reduce this? Would you want to reduce the number more to the point?
Don't let the number of parameters bother you, just make sure it's logical and well documented and let intellisen...
Function passed as template argument
...stantiated code for do_op with fadd looks something like:
convert a and b from int to float.
call the function ptr op with float a and float b.
convert the result back to int and return it.
By comparison, our by-value case requires an exact match on the function arguments.
...
When should I use a List vs a LinkedList
...ll out into your code.
However, if you need to do many insertions/removals from within a list, it offers constant time. List<T> offers linear time, as extra items in the list must be shuffled around after the insertion/removal.
...
How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
...ked for me but, something happened after I removed the Form.Font = new ... from the Form.Design.cs, the form started to re-scale properly, it works if the Font is defined in the constructor or not at all. Why? somebody else may be able to explained, I just can talk about the changed I made and took ...
Open document with default OS application in Python, both in Windows and Mac OS
...er things for Mac OS/X and Windows respectively, to do this.
To call them from Python, you can either use subprocess module or os.system().
Here are considerations on which package to use:
You can call them via os.system, which works, but...
Escaping: os.system only works with filenames that d...
Is there a performance difference between i++ and ++i in C++?
...l still get the same resulting code. In fact, without reading the count in from the user, the optimizer got the whole thing down to a constant. So this:
for(int i=0; i<10; i++)
{
testFoo++;
}
printf("Value: %d\n", testFoo.GetData());
Resulted in the following:
00401000 push 0Ah ...
Difference between objectForKey and valueForKey?
...ject as key.
Last, NSDictionary's implementation of valueForKey: deviates from the standard behavior defined in KVC's documentation, and will NOT emit a NSUnknownKeyException for a key it can't find - unless this is a "special" key - one that begins with '@' - which usually means an "aggregation" f...