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Reading from a file in node.js


Reading from a file in node.js

By : Patrick Barrell
Date : November 22 2020, 09:00 AM
may help you . Calling file.read will advance the current pointer position in the stream object twice. During the last chunk read, the while condition gets true and file.read() returns null, which results in an error.
Try the code below:
code :
data = file.read(); // Read first chunk
while (data !== null){
    console.log(data.toString());
    data = file.read(); // Read next chunk
}


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Xml file reading by its node c#

Xml file reading by its node c#


By : neys neys
Date : March 29 2020, 07:55 AM
should help you out Please use "PlaceHolder" in c#.you can easily drag and drop PlaceHolder :) then use this code
code :
foreach (XmlNode node in nodes)
{
  PlaceHolder1.Controls.Add(new LiteralControl("<table><tr><td>" + node["Name"].InnerText + "</td><td>"+node["Contact"].InnerText+"</td><td>"+node["Email"].InnerText+"</td><td>"+node["City"].InnerText+"</td><td>"+node["Country"].InnerText+"</td></tr></tabel>")); 
}
reading only first node from xml file with php

reading only first node from xml file with php


By : art
Date : March 29 2020, 07:55 AM
hop of those help? I am trying to read the xml data in to php. I managed to read all "title" data with this scipt. Problem is that I only need first "title" element from xml! In moment I get unfortunatly all of them. How to read only first "title" node? , Try:
code :
<?php
$filename = $_SERVER['DOCUMENT_ROOT'].'images/albums/album.xml';
if (file_exists($filename)) {
$xml = simplexml_load_file($filename);
echo $xml->title[0];
} else {
die("nothing");
}
?>
Reading the *next* node in a XML file (via XSL)

Reading the *next* node in a XML file (via XSL)


By : eNnvi
Date : March 29 2020, 07:55 AM
I wish this helpful for you to @DanielHaley I found out I had to use following-sibling::Meeting[1].
Here is my final script using the following-sibling method:
code :
<xsl:if test="position()!=last()">
    <!--No, it is not the last meeting. Show next weeks student assignments.-->

    <!--Is next week a special event?-->
    <xsl:if test="following-sibling::Meeting[1]/SpecialEvent=0">
    <!--No, it is not a special event.-->
        Next weeks students are:<br />
        Main:<br />
        <xsl:value-of select="following-sibling::Meeting[1]/BibleReadingM"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk1M"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk1MA"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk2M"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk2MA"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk3M"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk3MA"/><br />
    </xsl:if>

    <!--Auxiliary class 1-->
    <xsl:if test="following-sibling::Meeting[1]/NumberClasses&gt;=2">
        <br />
        Auxiliary class 1:<br />
        <xsl:value-of select="following-sibling::Meeting[1]/BibleReading1"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk11"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk11A"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk21"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk21A"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk31"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk31A"/><br />
    </xsl:if>

    <!--Auxiliary class 2-->
    <xsl:if test="following-sibling::Meeting[1]/NumberClasses=3">
        <br />
        Auxiliary class 2:<br />
        <xsl:value-of select="following-sibling::Meeting[1]/BibleReading2"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk12"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk12A"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk22"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk22A"/><br />
        <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk32"/> / <xsl:value-of select="following-sibling::Meeting[1]/StudentTalk32A"/><br />
    </xsl:if>
</xsl:if>
reading a file using node.js

reading a file using node.js


By : MiBky
Date : March 29 2020, 07:55 AM
wish of those help Above img shows my File order. Note: I'm using IntelliJ IDEA. You will have to find the file "details.txt" in your system.
code :
//Instead of using hard coded path, use: the following code to get the path in Node.js
//var path = require('path');
//console.log(path.join(__dirname, '../details.txt'));

//require file system
var fs = require('fs');

//read file
fs.readFile("details.txt",'utf8',function(err,data){

  //if error, log error and return
  if(err) { return console.error('Error: ' + err); }


  //check if there is data in the file
  if(data) {

     //EDITED to include line break
    //write response
    //response.write('<div style="color:green">' + data + '</div>');

    //write response with <br>
    response.write('<div style="color:green">' + data.split('\n').join('<br>') + '</div>');

    //end the response
    response.end();


  //if no data on the file, do the following
  }else{
    //error variable
    var error = "Error: file is empty: " + data.length + " bytes.";

    //log error
    // console.error(error);

    //write response
    response.write('<div style="color:red">' + error + '</div>');

    //end response
    response.end();
  }
});
Reading from a log file in node js

Reading from a log file in node js


By : user2405659
Date : March 29 2020, 07:55 AM
it should still fix some issue Kindly use this: It parse large files line by line using a stream & pipe.
code :
var fs = require('fs')
    , util = require('util')
    , stream = require('stream')
    , es = require('event-stream');

var lineNr = 0;

var s = fs.createReadStream('very-large-file.csv')
    .pipe(es.split())
    .pipe(es.mapSync(function(line){

        // pause the readstream
        s.pause();

        lineNr += 1;

        // process line here and call s.resume() when rdy
        // function below was for logging memory usage
        logMemoryUsage(lineNr);

        // resume the readstream, possibly from a callback
        s.resume();
    })
    .on('error', function(err){
        console.log('Error while reading file.', err);
    })
    .on('end', function(){
        console.log('Read entire file.')
    })
);
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