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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...iler will sometimes initialize memory with certain patterns such as 0xCD and 0xDD . What I want to know is when and why this happens.
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How to create hyperlink to call phone number on mobile devices?
...or this reason the + sign is always necessary. The + sign is automatically converted by your mobile carrier to your international dialing prefix, also known as "exit code". This code varies by region, country, and sometimes a single country can use multiple codes, depending on the carrier. Fortunate...
Passing Objects By Reference or Value in C#
... have always thought that non-primitive variables were passed by reference and primitive values passed by value.
7 Answers
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Iterate through a C++ Vector using a 'for' loop
I am new to the C++ language. I have been starting to use vectors, and have noticed that in all of the code I see to iterate though a vector via indices, the first parameter of the for loop is always something based on the vector. In Java I might do something like this with an ArrayList:
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How to get the size of a string in Python?
... str you should know which encoding your str object is using. Then you can convert it to unicode object and get character count:
>>> print(len('йцы'.decode('utf8'))) #String contains Cyrillic symbols
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B. The sys.getsizeof() function does the same thing as in Python 3 - it returns co...
Testing if object is of generic type in C#
...of inheritance. If, along the way, you have a base with both a base class and the interface you're looking for, this goes down the class path only.
– Groxx
Mar 18 '11 at 23:41
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How to work with complex numbers in C?
...t doesn't give me much information about how to use it. How to access real and imaginary parts in an efficient way? Is there native functions to get module and phase?
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Dictionary returning a default value if the key does not exist [duplicate]
...ictionary, so you can just use:
dictionary.TryGetValue(key, out value);
and just ignore the return value. However, that really will just return default(TValue), not some custom default value (nor, more usefully, the result of executing a delegate). There's nothing more powerful built into the fra...
Restful API service
... some data from a RESTful Web Service, you should look into ResultReceiver and IntentService.
This Service + ResultReceiver pattern works by starting or binding to the service with startService() when you want to do some action. You can specify the operation to perform and pass in your ResultRecei...
Database design for audit logging
...d that is used by a few wiki platforms is to separate the identifying data and the content you're auditing. It adds complexity, but you end up with an audit trail of complete records, not just listings of fields that were edited that you then have to mash up to give the user an idea of what the old...