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What is the most efficient way to deep clone an object in JavaScript?
...tring representation of the date in ISO format, which JSON.parse() doesn't convert back to a Date object. See this answer for more details.
Additionally, please note that, in Chrome 65 at least, native cloning is not the way to go. According to JSPerf, performing native cloning by creating a new fu...
How to specialize std::hash::operator() for user-defined type in unordered containers?
... h is an expression of type H or const H, and k is an expression of a type convertible to (possibly const) Key, then h(k) is a valid expression with type size_t.
If h is an expression of type H or const H, and u is an lvalue of type Key, then h(u) is a valid expression with type size_t which does no...
What is PECS (Producer Extends Consumer Super)?
...t.add("prem");
List<Object> listObject=list; //Type mismatch: cannot convert from List<String> to List<Object> at Compiletime
more examples
bounded(i.e. heading toward somewhere) wildcard : There are 3 different flavours of wildcards:
In-variance/Non-variance: ? or ? ex...
Determining type of an object in ruby
...s_a?(String) is too rigid since another class might implement methods that convert it into a string, or make it behave identically to how String behaves. object.respond_to?(:to_s) would be a better way to test that the object in question does what you want.
...
Python : List of dict, if exists increment a dict value, if not append a new dict
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The second version is good since I can convert the dict as a list after.
– Natim
Nov 7 '09 at 8:32
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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
... does it the other way around by using stringstream as the standard way of converting to a string.
Poor support for i18n
Iostream-based output splits string literals into pieces.
cout << "My name is " << name << " and I am " << occupation << " from " << hometow...
Redis key naming conventions?
..., toystring) {
var toy = JSON.parse(toystring);
...
}
No need to convert slashes to colons and vice versa. Convenient, don't you think?
Note: always ensure that user is able to access only things you intended. The raw URL-to-key approach above is able to fetch user/1/password as well, as ...
Adding an identity to an existing column
...t can also be used in non-partitioned tables too.
I've used this trick to convert, in under 5 seconds, a column of a of a 2.5 billion row table from IDENTITY to a non-IDENTITY (in order to run a multi-hour query whose query plan worked better for non-IDENTITY columns), and then restored the IDENTIT...
Where do I find the current C or C++ standard documents?
...he standard is maintained as LaTeX sources on Github. These sources can be converted to HTML using cxxdraft-htmlgen. The following sites maintain HTML pages so generated:
Tim Song - Current working draft - C++11 - C++14 - C++17
Eelis - Current working draft
Tim Song also maintains generated HTML...
Why is rbindlist “better” than rbind?
...t shines are
Fast vectorized merge of list of data.frames by row
Trouble converting long list of data.frames (~1 million) to single data.frame using do.call and ldply
These have benchmarks that show how fast it can be.
rbind.data.frame is slow, for a reason
rbind.data.frame does lots of check...