Suggestion: Add lineNumber #8393

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1. princejwesley

   added

   readlineIssues and PRs related to the built-in readline module.Issues and PRs related to the built-in readline module.

   on Sep 2, 2016
2. princejwesley commented on Sep 2, 2016

   

   princejwesley

   on Sep 2, 2016

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   ... read a line number of a module

   @ev1stensberg Can you give an example?
3. evenstensberg commented on Sep 2, 2016

   

   evenstensberg

   on Sep 2, 2016

   Last edited by evenstensberg

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   I have a config file, where user can input line number and a string. (linenumber is lineNumber && query is string),

   if the line number is correct and the string is the same as in the config, we log and write to the output.txt file.

   Let me know if this was unclear!

   const readline = require('readline')
   const fs = require("fs")
   
   module.exports = function(){
     const outi = fs.createWriteStream('output.txt')
     const rl = readline.createInterface({
       input:  fs.createReadStream('input.txt')
     })
     let counter = 0;
     rl.on('line', (line) => {
         ++counter
   
       lineNumber.filter( (lines) => {
         if(lines === counter) {
           query.filter ( (pair) => {
             if(pair === line) {
               console.log("yess", line)
               outi.write(pair)
             }
           })
         }
       })
     })
   }
4. evenstensberg commented on Sep 2, 2016

   

   evenstensberg

   on Sep 2, 2016

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   Compared, having lineNumber, I could make this less volatile and perhaps cut some loops off.
5. evenstensberg commented on Sep 2, 2016

   

   evenstensberg

   on Sep 2, 2016

   Last edited by evenstensberg

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   const rl = readline.createInterface({
     input: process.stdin,
     output: process.stdout,
     LineNumber: line.number
   });

   This is rather a crazy idea, but having this run in parallell, so we could do something like

   lineNumber.filter( (number) => {
   if(rl.LineNumber === number) {
    console.log("yeeey")
   }
6. mscdex

   added

   feature requestIssues requesting new Node.js features.Issues requesting new Node.js features.

   on Sep 2, 2016
7. mscdex commented on Sep 6, 2016

   

   mscdex

   on Sep 6, 2016

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   As I mentioned in the PR related to this, I am -1 on this idea. It's easy enough to do in userland and IMHO adding it to core would be a sign of feature creep.
8. evenstensberg

   closed this as completedon Sep 9, 2016