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Cleaner way to update nested structures
...ess,
set = (p: Person, addr: Address) => p.copy(address = addr))
Now, compose them to get a lens that changes zipcode in a person:
val personZipCodeLens = personAddressLens andThen addressZipCodeLens
Finally, use that lens to change raj:
val updatedRaj = personZipCodeLens.set(raj, pers...
Java 8 Streams: multiple filters vs. complex condition
...aryStatistics{count=100, sum=10320, min=82, average=103.200000, max=127}
now the code:
enum Gender {
FEMALE,
MALE
}
static class User {
Gender gender;
int age;
public User(Gender gender, int age){
this.gender = gender;
this.age = age;
}
public Gender...
Why does Unicorn need to be deployed together with Nginx?
I would like to know the difference between Nginx and Unicorn. As far as I understand, Nginx is a web server while Unicorn is a Ruby HTTP server.
...
Add legend to ggplot2 line plot
...; you are creating a mapping to this "variable".
scale_colour_manual can now map these strings to the appropriate colors. The result is
In some cases, the mapping between the levels and colors needs to be made explicit by naming the values in the manual scale (thanks to @DaveRGP for pointing thi...
Map vs Object in JavaScript
... track of size for an Object.
Use maps over objects when keys are unknown until run time, and when
all keys are the same type and all values are the same type.
Use objects when there is logic that operates on individual elements.
https://developer.mozilla.org/en-US/docs/Web/JavaScript...
Pointers vs. values in parameters and return values
...base interfaces or serializers need to append to a slice whose type isn't known at compile time. They sometimes accept a pointer to a slice in an interface{} parameter.
Maps, channels, strings, and function and interface values, like slices, are internally references or structures that contain ref...
How to generate random SHA1 hash to use as ID in node.js?
... unique value in all but the most insane parallel computing situations. I know its silly and randomBytes(20) is going to be unique, but its just a confidence we can have because we may not be familiar with internals of random generation of another library.
– Dmitri R117
...
LINQ - Full Outer Join
...
I don't know if this covers all cases, logically it seems correct. The idea is to take a left outer join and right outer join then take the union of the results.
var firstNames = new[]
{
new { ID = 1, Name = "John" },
new { I...
How does HTTP file upload work?
... uploaded file determined by browser?
application/x-www-form-urlencoded
Now change the enctype to application/x-www-form-urlencoded, reload the browser, and resubmit.
Firefox sent:
POST / HTTP/1.1
[[ Less interesting headers ... ]]
Content-Type: application/x-www-form-urlencoded
Content-Length:...
Is either GET or POST more secure than the other?
....
If your site performs sensitive operations, you really need someone who knows what they’re doing, because this can’t be covered in a single answer. You need to use HTTPS, HSTS, CSP, mitigate SQL injection, script injection (XSS), CSRF, and a gazillion of other things that may be specific to yo...