dewlinq v1.0.3
Dewlinq
What is
If you came from c# you sure know linq. This is a base implementation of my favourites methods of linq.
Hot to use
The first thing you need to do is to import and initialize linq. A good idea is to do this into the app entry point, for example:
import linq from 'dewlinq';
// this is the initialization
linq();
After that you can use linq on array or on Dicitonaries (linq type, needs import);
Default callback
If you need to use a linq function (for example first()) you needs to pass always a callack.
The linq library export the no callback that return always return true, so you can use like a no-callback
For example
import linq, { no } from 'dewlinq';
// this is the initialization
linq();
const a: string[] = ["hello","my","name","is","carriage"];
console.log(a.first(no))
// this will print "hello"
console.log(a.first((x) => true))
// this also will print "hello"
console.log(a.first((x) => x === "my"))
// this will print "my"
The use of SELECT
You can use the select to get an array of new type object, for example
import linq, { no } from 'dewlinq';
// this is the initialization
linq();
class UserName{
public fullName: string = "";
public constructor(fullName: string)
{
this.fullName = fullName;
}
}
class User{
public name: string = "";
public surname: string = "";
public constructor(name:string, surname:string)
{
this.name = name;
this.surname = name;
}
}
const a: User[] = [new User("Andrea","Abbondanza"), new User("D","The Carriage")];
const b: UserName[] = a.select<UserName>((x) => new UserName(x.name + " " + x.surname));
// you can also combine them
const c: UserName[] = a.where((x) => /Andrea/.test(x.name)).select<UserName>((x) => new UserName(x.name + " " + x.surname));
b.forEach((element) => {
console.log(element.fullName +", ");
});
// will print "Andrea Abbondanza, D The Carriage"
c.forEach((element) => {
console.log(element.fullName);
});
// will print "Andrea Abbondanza,"
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