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What are free monads?
...gives you a way to "get out" of it.
More generally, if X is a Y with some extra stuff P, then a "free X" is a a way of getting from a Y to an X without gaining anything extra.
Examples: a monoid (X) is a set (Y) with extra structure (P) that basically says it has an operation (you can think of add...
How can I clear or empty a StringBuilder? [duplicate]
I'm using a StringBuilder in a loop and every x iterations I want to empty it and start with an empty StringBuilder , but I can't see any method similar to the .NET StringBuilder.Clear in the documentation, just the delete method which seems overly complicated.
...
Java int to String - Integer.toString(i) vs new Integer(i).toString()
...
Integer.toString calls the static method in the class Integer. It does not need an instance of Integer.
If you call new Integer(i) you create an instance of type Integer, which is a full Java object encapsulating the value of your int...
IntelliJ inspection gives “Cannot resolve symbol” but still compiles code
...ehow didn't clear out the old .iml files under .idea/modules. Delete those extra .iml file and rebuild the project fixed the issue.
– Chen
Dec 14 '18 at 16:10
...
Proper way to handle multiple forms on one page in Django
...t instantiates these, without using either the messages framework or query strings? This answer seems the closest, but here it's still just one view handling both forms: stackoverflow.com/a/21271659/2532070
– YPCrumble
Oct 15 '14 at 10:10
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What's the Point of Multiple Redis Databases?
...tive expire of keys and VM. If the DB
selection can be performed with a string I can see this feature being
used as a scalable O(1) dictionary layer, that instead it is not.
With DB numbers, with a default of a few DBs, we are communication
better what this feature is and how can be u...
What is the difference between an int and an Integer in Java and C#?
... Integer:
Integer i = new Integer(6);
You could call some method on i:
String s = i.toString();//sets s the string representation of i
Whereas with an int:
int i = 6;
You cannot call any methods on it, because it is simply a primitive. So:
String s = i.toString();//will not work!!!
would...
Handling JSON Post Request in Go
..."log"
"net/http"
"io/ioutil"
)
type test_struct struct {
Test string
}
func test(rw http.ResponseWriter, req *http.Request) {
body, err := ioutil.ReadAll(req.Body)
if err != nil {
panic(err)
}
log.Println(string(body))
var t test_struct
err = json.Unmars...
Bidirectional 1 to 1 Dictionary in C#
...her dictionaries modify both.
Usage:
var dic = new BiDictionary<int, string>();
dic.Add(1, "1");
dic[2] = "2";
dic.Reverse.Add("3", 3);
dic.Reverse["4"] = 4;
dic.Clear();
Code is available in my private framework on GitHub: BiDictionary(TFirst,TSecond).cs (permalink, search).
Copy:
[Ser...
Why in Java 8 split sometimes removes empty strings at start of result array?
Before Java 8 when we split on empty string like
3 Answers
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