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Big O, how do you calculate/approximate it?
...tational steps, meaning that the body of the for statement gets executed N times. That's the same as adding C, N times:
f(N) = C + (C + C + ... + C) + C = C + N * C + C
There is no mechanical rule to count how many times the body of the for gets executed, you need to count it by looking at what d...
Get index of array element faster than O(n)
... of keeping really huge array and calling Array#index enormous amount of times.
8 Answers
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What's a good way to overwrite DateTime.Now during testing?
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My preference is to have classes that use time actually rely on an interface, such as
interface IClock
{
DateTime Now { get; }
}
With a concrete implementation
class SystemClock: IClock
{
DateTime Now { get { return DateTime.Now; } }
}
Then if you wan...
List all the files that ever existed in a Git repository
Do you have a clean way to list all the files that ever existed in specified branch?
4 Answers
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Array.Copy vs Buffer.BlockCopy
...er what circumstances should you use BlockCopy ? Should you use it at any time when you are copying primitive type arrays, or should you only use it if you're coding for performance? Is there anything inherently dangerous about using Buffer.BlockCopy over Array.Copy ?
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Python: Append item to list N times
...ing Python would have a shortcut for. I want to append an item to a list N times, effectively doing this:
6 Answers
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What do 'statically linked' and 'dynamically linked' mean?
... a file into an executable, the contents of that file are included at link time. In other words, the contents of the file are physically inserted into the executable that you will run.
When you link dynamically, a pointer to the file being linked in (the file name of the file, for example) is inclu...
Is there any use for unique_ptr with array?
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@DanNissenbaum Also some hard real-time systems are not allowed to use dynamic memory allocation at all as the delay a system call causes might not be theoretically bounded and you can not prove the real-time behavior of the program. Or the bound may be too la...
TimePicker Dialog from clicking EditText
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eReminderTime.setText( "" + selectedHour + ":" + selectedMinute);
Your missing a + between "" and selected hour, setText methods only take a single string, so you need to concatenate all the parts (the first quotes are likely unnece...
How to split one string into multiple strings separated by at least one space in bash shell?
I have a string containing many words with at least one space between each two. How can I split the string into individual words so I can loop through them?
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