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What's the difference between design patterns and architectural patterns?
... sort are all algorithmic patterns for organizing a group of elements in a order.
For a most simplistic view:
Programming paradigms - specific to programming language
Design patterns - solves reoccurring problems in software construction
Architectural patterns - fundamental structural organizatio...
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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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 supervised learning and unsupervised learning? [closed]
...n the case of online learning, the algorithm receives data in a sequential order (stream) as opposed to batch learning where the algorithm learns on the entire dataset as a whole. Additionally, in active learning the algorithm decides which incoming data point to learn from (query it's label from th...
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...
c++ boost::multi_index composite keys efficiency - C/C++ - 清泛网 - 专注C/C++及内核技术
...he documentation states that "Composite keys are sorted by lexicographical order, i.e. sorting is performed by the first key, then the second key if the first one is equal, etc". Does this mean that the structure is stored such that a lookup for a specific 2-part composite key will take O(n=1) time,...
How do I convert a git repository to mercurial?
...
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 ...
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...
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...