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How come func is called from a function?


How come func is called from a function?

By : Shanari
Date : December 05 2020, 12:18 PM
may help you . The negate function accepts a function as an argument and returns a new function it creates that, when called, will call the original function with the argument you give it, negate that function's return value, and return that negated value.
negate is used to create a function we assign to isNotNaN that, when called, will call isNaN with whatever argument you pass it and negate the result.
code :


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Javascript function called in the manner of func(a)(b)(c)

Javascript function called in the manner of func(a)(b)(c)


By : user3291051
Date : March 29 2020, 07:55 AM
I wish this helpful for you As mentioned in the notes it is called currying. Here is a simple example of what is going on:
code :
// uncurried
var example1 = function (a, b, c) {
    // do something with a, b, and c
};

// curried
var example2 = function(a) {
    return function (b) {
        return function (c) {
            // do something with a, b, and c
        };
    };
};
Function is being called with type in front of it: (T)func(param1, param2). What is this called and what is it for?

Function is being called with type in front of it: (T)func(param1, param2). What is this called and what is it for?


By : user3709399
Date : March 29 2020, 07:55 AM
Does that help The (T) is an explicit cast. See the docs here, under the "Explicit Conversions" title: https://msdn.microsoft.com/en-us/library/ms173105.aspx
The func(params) bit is just a method call. The cast is not part of it, you're just casting the result.
code :
// cast the result of a method call
var i = (int)Mathf.Log(level, 2f);

// cast a random object
var s = (string)someObject;
How to write a function that could be called like func(a)(b)(c) in php?

How to write a function that could be called like func(a)(b)(c) in php?


By : user1878179
Date : March 29 2020, 07:55 AM
it should still fix some issue What you're talking about is called Currying. The following code will require PHP 7, since it involves invoking a function returned from another one, which wasn't possible until PHP's Abstract Syntax Tree was implemented in that version.
First things first, you'll need a new sum() function that can operate on an arbitrary number of variables:
code :
$sum = function(...$args)  { return array_sum($args); };
function calc($x)
{
    return function($y = null) use ($x)
    {
        if (is_callable($y)) {
            return $y(...$x);
        } else {
            $args = (array) $x;
            $args[] = $y;
            return calc($args);
        }
    };
}

echo calc(5)(3)(2)($sum); // 10
echo calc(1)(2)($sum); // 3
echo calc(2)(3)('pow'); // 8
Firebase function is called, but func method .set() after .doc() is not working

Firebase function is called, but func method .set() after .doc() is not working


By : PaulStupka
Date : March 29 2020, 07:55 AM
this one helps. I m trying to create a document in Firebase Firestore via Firebase Function calling from client (Android). , The following should work:
code :
'use strict';

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();


export const createPack = functions.https.onCall((data) => {

    console.log("[CREATE PACK] START");

    const db = admin.firestore();

    var documentRef = db.collection("packs").doc();

    console.log("[CREATE PACK] GOT REF");

    return documentRef.set({
        title: data.title,
        date: data.date,
        total: data.total,
        activated: 0
    })
    .then(() => {
        const packId = documentRef .id;

        console.log('[CREATE PACK] PACK ID ' + packId);
        console.log('[CREATE PACK] END');
        return { "id": packId };
    });

});
Is there a Javascript idiom where function `func` is called as `func.bind(this)`

Is there a Javascript idiom where function `func` is called as `func.bind(this)`


By : fudaofudao
Date : March 29 2020, 07:55 AM
hop of those help?
I was wondering if there is a concise way to always use the this context of its caller.
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