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Tetris-ing an array
...refix that takes two strings as input. Then apply it to the strings in any order to reduce them to their common prefix. Since it is associative and commutative the order doesn't matter for the result.
This is the same as for other binary operations like for example addition or greatest common divis...
Cross-thread operation not valid: Control accessed from a thread other than the thread it was create
...lease read the Threading Model in UI applications (old VB link is here) in order to understand basic concepts. The link navigates to page that describes the WPF threading model. However, Windows Forms utilizes the same idea.
The UI Thread
There is only one thread (UI thread), that is allowed to a...
How do I convert a git repository to mercurial?
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The hg convert utility isn't on by default after installation. In order to set it as such add the following to your .hgrc file.
[extensions]
hgext.convert=
If you're using TortoiseHg on Windows then this file resides in your home directory as mercurial.ini. After this setting change you ...
When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...at's not been mentioned is that of locality.
A MAC address or time-based ordering (UUID1) can afford increased database performance, since it's less work to sort numbers closer-together than those distributed randomly (UUID4) (see here).
A second related issue, is that using UUID1 can be useful i...
Count work days between two dates
...ADD(dd,DATEDIFF(dd,0,@EndDate) , 0)
--If the inputs are in the wrong order, reverse them.
IF @StartDate > @EndDate
SELECT @Swap = @EndDate,
@EndDate = @StartDate,
@StartDate = @Swap
--Calculate and return the number of workdays using th...
Are strongly-typed functions as parameters possible in TypeScript?
... a function. They're usually applied in the function signature of a higher-order function. A higher-order function is a function which accepts functions as parameters or which returns a function. It has the following syntax:
(arg1: Arg1type, arg2: Arg2type) => ReturnType
Example:
type Functio...
Hash Code and Checksum - what's the difference?
...catin it may even be desirable for the hash to be very slow to compute (in order to combat brute force attacks).
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How to install 2 Anacondas (Python 2 and 3) on Mac OS
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Best way to extract a subvector from a vector?
...irely clear; and it gets worse if the length and start_pos are of the same order of magnitude.)
Anyway, remember that this is not a copy, it's just a view of the data in the vector, so be careful. If you want an actual copy, you could do:
std::vector<T> new_vec(my_subspan.cbegin(), my_subspan....
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
...e writing an error through cerr, which keeps the messages in chronological order of their generation when both are directed to the same terminal/file/etc..
This contrasts with clog - if you write there it won't be buffered and isn't tied to anything, so it will buffer decent sized amounts of loggin...