Given s='/acct /1,696,807 /name/' write a Bash command to extract the numbers without commas. Your command must work for 1 any number of numbers and commas. Answers based on fixed nubmer ofnumbers and com- mas . Write a grep statement to match lines such as below using two backreferences. Mr abc came home to Mrs abc and visit Mr xyz and Mrs xyz to discuss backreferences

Given s='/acct /1,696,807 /name/' write a Bash command to extract the numbers without commas. Your command must work for 1 any number of numbers and commas. Answers based on fixed nubmer ofnumbers and com- mas . Write a grep statement to match lines such as below using two backreferences. Mr abc came home to Mrs abc and visit Mr xyz and Mrs xyz to discuss backreferences

Microsoft Visual C#

7th Edition

ISBN:9781337102100

Author:Joyce, Farrell.

Publisher:Joyce, Farrell.

Chapter14: Files And Streams

Section: Chapter Questions

Problem 2CP: In Chapter 11, you created the most recent version of the MarshallsRevenue program, which prompts...

See similar textbooks

Similar questions

In Chapter 11, you created the most recent version of the MarshallsRevenue program, which prompts the user for customer data for scheduled mural painting. Now, save all the entered data to a file that is closed when data entry is complete and then reopened and read in, allowing the user to view lists of customer orders for mural types.
Why should you always enclose your `grep` search pattern in single quotes? (e.g. `grep -v '\?*' file` as opposed to `grep -v \?* file`) They are required by `grep`. Some shell metacharacters are also regular expression characters, so `grep` could get confused when interpreting the command string. Quoting them makes `grep` ignore them and pass the literal characters to `bash`. Some regular expression characters are also shell metacharacters and `bash` could get confused when interpreting the command string. Quoting them makes `bash` ignore them and pass the literal characters to `grep` They are required by `bash`.
Implement a new alias command (mandatory for teams of 4 and not required for teams of 3) Add a new built-in alias command that allows you to define a shortcut for commands by essentially defining a new command that substitutes a given string for some command, perhaps with various flags/options. The syntax is as follows: alias alias_name='command'. For example, you can define an alias with alias 5='ls –al', so that the user can then enter 5 at the prompt to execute the ls -al command. Although there is an alias command in bash, you must implement your own version and not make use of the built-in alias bash command. Typically, alias is a built-in command, but since this affects how your shell functions (i.e., you simply cannot just pass an aliased command to the exec family system call as you are managing the execution which would otherwise result in a not found message. Specifying alias with no arguments should display a list of all existing aliases. You may remove a single alias with…
Provide a function named "addToSessionStorage" that accepts two parameters: The first parameter "storeName" is the store name for your session storage. The second parameter "objName" is an object. Inside the function, use sessionStorage to save "objName" under the store name. Your test object can contain any properties you want.Hint: Use JSON methods on these storage problems. Note: The remaining buttons and paragraphs do not have id attributes. You will need to construct selectors to meet these challenges.
modify minishell.c to run who, ls, and date with option. who will show the count of users, ls will list files in long listing format and date will show UTC time. Modify this file so the shell can run commands with options.*/#include <stdio.h>#include <unistd.h>#include <sys/types.h>#include <sys/wait.h>#include <stdlib.h>#include <fcntl.h> int main(int argc, char *argv[]){ char *cmd[] = {"who", "ls", "date"}; int i; while(1){ printf("0=who 1=ls 2=date : "); scanf( "%d", &i ); if(i<0 || i>2) continue; pid_t result= fork(); if(result==0) { /* child */ execlp( cmd[i], cmd[i], (char *)0 ); printf("execlp failed\n"); exit(1); } else if (result >0){ /* parent */ int status; wait(&status); } else{ //handle error } } return 0;}
It is possible to transmit an array of attribute values to the console screen buffer's consecutive cells by using which Win32 method?
Write The preceding code for the seeders file for the posts, but instead, we are now inserting users with the correct fields. Every user receives an auto-incremented ID by our MySQL server when inserting a user.
Book reference: Windows PowerShell Step by Step 3rd Edition - Ed WilsonChapter 16 6. What parameter can be used to bypass the below confirmation prompt? Remove-ADGroupMember -Identity TestGroup1 -Members UserGroupTest Confirm Are you sure you want to perform this action? Performing operation "Set" on Target "CN=TestGroup1,OU=TestOU,DC=NWTraders,DC=Com". [Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"):
Which Win32 function lets you copy an array of attribute values to consecutive cells of theconsole screen buffer?
#include <stdio.h> struct clientData { unsigned int acctNum; char lastName[15]; char firstName[10]; double balance; }; unsigned int enterChoice(void);void textFile(FILE* readPtr);void updateRecord(FILE* fPtr);void newRecord(FILE* fPtr);void deleteRecord(FILE* fPtr); int main(void) { FILE* cfPtr; if ((cfPtr = fopen("accounts.dat", "rb+")) == NULL) { puts("File could not be opened."); } else { unsigned int choice; while ((choice = enterChoice()) != 5) { switch (choice) { case 1: textFile(cfPtr); break; case 2: updateRecord(cfPtr); break; case 3: newRecord(cfPtr); break; case 4: deleteRecord(cfPtr); break; default: puts("Incorrect…
Please fix this JAVA code so that it will not overwrite the contents of the file every time I click on a row @Overridepublic void valueChanged(ListSelectionEvent event) {File file = new File("sample json file");int row = table.getSelectedRow();JSONObject obj = (JSONObject) jsonArray.get(row);ObjectMapper mapper = new ObjectMapper();mapper.enable(SerializationFeature.INDENT_OUTPUT);try {JsonGenerator g = mapper.getFactory().createGenerator(new FileOutputStream(file));mapper.writeValue(g, obj);g.close();} catch (IOException e) {throw new RuntimeException(e);}}});
The “Boston” data set is a built-in dataset in the “MASS” library of R. The “Boston” data set containsinformation about the housing values in suburbs of Boston city. First, load the “Boston” data set intoyour R workspace. In Rstudio, you can click on the “Packages” tab and then on the checkbox next toMASS. Without Rstudio, type the following command in R console: data(Boston,package=”MASS”)To know more information about this dataset, type the following command in R console: ?BostonThen, answer the following questions based on the dataset, using R/Rstudio:a. How many rows and columns in this data set? b. How many of the suburbs in this dataset bound the Charles River? (Hint: Variable chas is adummy variable; chas=1 means tract bounds river, 0 otherwise) You can obtain a list of suburbsbound the Charles River with the command: subset(Boston,chas==1) You can obtain a count of the suburbs bound the Charles River by sum(Boston$chas==1) c. What is the probability that you randomly select a…