pipe

问题 i have problem with observable and async pipe. I have input in my component with Observable. In controller and on subscribe into observable in ngOnInit im get valid values. Problem is in template, I do not get valid values on template. I want to have async in image src attribute. TvShowComponent (return Observable) public getCoverLink(): Observable<string> { return this.tvShowForm.get('cover').valueChanges.pipe(map((coverLink: string) => { return coverLink; })); } TvShowComponent template

问题 I'm trying to make a program using the pipe communication. This is what I'm trying to do: the user sends positive integers. If the user sends a negative number the communication ends. The parent process prints the maximum number and the minimum number. This is what I tried: #include <unistd.h> #include <stdio.h> main(){ int pfd[2]; int buff[200]; pipe(pfd); if(fork()==0){ close(pfd[0]); int n; printf("Give a number: "); scanf("%d",&n); while(n >=0 ){ write(pfd[1],&n,1); printf("Give a number:

问题 I would like to: Parent process: Write data to a pipe Send a signal to child process Child process: Read data after signal is caught. Here is my tryout: #include<stdio.h> #include<string.h> #include <stdlib.h> #include <sys/types.h> #include <sys/uio.h> #include <fcntl.h> #include <unistd.h> #include <signal.h> int fd[2]; //Handler - Exiting process, OR reading from pipe void sigHandler(int signumber){ if(signumber == SIGUSR1) { printf("SIGUSR1 catched.\n"); //So lets read from pipe int read

问题 We're using: Linux version 2.6.32-696.20.1.el6.x86_64 (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Fri Jan 12 15:07:59 EST 2018 x86_64 x86_64 x86_64 GNU/Linux I want to send data from one server to another using scp ( secure copy procedure). We're unzipping the data first. Also we're only unzipping the data and piping it (hence the unzip -p) to the server as opposed to unzipping to a file on the local server and then sending it. This is because the server is a producion

问题 I've tried many times to get full contents of boygj.com in feed using Yahoo Pipes In the pipes is: Fetch feed http://boygj.com/rss.xml Cut content from <div class="content"> to <div class="service-links"> ...all those contents assigned to item.description.content But the pipes always showing wrong cutting. What happened and what is the solution? 回答1: http://boygj.com/rss.xml is a RSS 2.0 feed, there is no div to cut. Instead, use the Fetch Page module to get http://boygj.com and parse it with

问题 This error: error TS2322: Type 'Observable' is not assignable to type 'Observable'. Type 'string[]' is not assignable to type 'Sensors[]'. Type 'string' is not assignable to type 'Sensors'. show in this Typescript Code: import { Observable } from 'rxjs/Rx'; import { map, startWith } from 'rxjs/operators'; filteredSensors: Observable<Sensors[]>; constructor(private fb: FormBuilder, private ws: SensorService ) { this.myform= new FormGroup({ 'sensors_id': this.fb.array([], Validators.required),

问题 When i use import-csv to retrieve data from a .csv file I'm able to retrieve the data in the file in the console pane using Import-CSV: import-csv \\TestPath\licenses_v2.csv However, when i pipe that output to a select-object statement the same amount of rows are retrieved but they're now all empty. import-csv \\TestPath\licenses_v2.csv | select-object FirstName,LastName,Department,Title This occured after i began testing the following two seperate scripts, in an attempt to TRUNCATE before an

问题 I need help to write a filter PIPE component that will filter and display only the job posts that contains the selected search array words. Found a way to return by using 1 search value but i need it to return multiple search result in an array jobCategory=['admin','clerk','driver','labour','helper'] selectedCategory=['driver','helper'] HTML: <ion-item *ngFor="let posting of (postingList | postingFilter:'jobCategory':selectedCategory)" > PIPE: export class PostingFilterPipe implements

问题 I have been working on a project that pipes data back and forth between a QGIS plugin written in Python and some image processing code I have written in C++. After some community help via the following 2 questions I have gotten a console based sample code working that simulates an image, pipes it over to my C++ code, does some nontrivial processing, and then pipes it back and unpacks it correctly. I am having trouble porting this to a GUI style code. previous questions for reference: Data

问题 I want to make a simple program that starts a cmd.exe parallely and takes input from the user as a command, which is then passed to the cmd.exe, after execution my program should take the output from cmd.exe and display it to the user. Basically an interface to a command prompt. I don't want to use methods like system() as they start a new instance of cmd every time and I can't run commands like cd. I tried it with the following code with which I am able to spawn a cmd and show initial line