Hello, long time no see! :
Nomkid and I are working on a program that one core feature is to parse and index file to multiple program readable arrays, separated at each time a line contains a certain content.
This is written in node.js :
Code: const fs = require('fs');
const homedir = require('os').homedir();
const prgmdir = homedir+'/.program_name';
const tmpdir = prgmdir+'/tmp';
const indexcache = tmpdir+'/master.index'
var index = fs.readFileSync(indexcache).toString();
index = index.split('\n');
var index_filtered = index.filter(Boolean);
console.log(index_filtered);
^^^ that's what i have right now.
My intention is to split the massive array (index_filtered), into smaller and more program readable mini array chunks at each time a line starts with certain characters.
how would we go about doing this, would i use a regex like :
Code: var index_lbls = index_filtered.indexOf(/Index of /gi);
but that works to no avail, (it returns -1).
any help would be greatly appreciated
indexOf compares via strict equality only. Probably best just to iterate yourself to get the index.
Tari & Jacobly first wrote:
Probably best just to iterate yourself to get the index.
so now i'm iterating through the array with the .forEach(); tag
Code: const fs = require('fs');
const homedir = require('os').homedir();
const prgmdir = homedir+'/.program_name';
const tmpdir = prgmdir+'/tmp';
const indexcache = tmpdir+'/master.index'
var index = fs.readFileSync(indexcache).toString();
index = index.split('\n');
var index_filtered = index.filter(Boolean);
console.log(index_filtered);
index_filtered.forEach(function(value) {
const index_true = value.match(/Index of /gi);
console.log(index_true);
});
now it's just spewing out lots of nulls and occasionally an array containing only ['Index of ']
it looks something like this :
Code: [ 'Index of ' ]
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
null
[ 'Index of ' ]
null
null
null
null
null
null
null
null
null
null
null
shouldn't it only be returning 'true' when it sees a line that matches the regex /Index of/gi?
String.match returns an array, so that looks correct. Sounds like you wanted
RegExp.test instead.
Tari wrote:
Code: const fs = require('fs');
const homedir = require('os').homedir();
const prgmdir = homedir+'/.program_name';
const tmpdir = prgmdir+'/tmp';
const indexcache = tmpdir+'/master.index'
var index = fs.readFileSync(indexcache).toString();
index = index.split('\n');
var index_filtered = index.filter(Boolean);
console.log(index_filtered);
const regex = RegExp('Index of*');
const globalRegex = RegExp('Index of*', 'g');
index_filtered.forEach(function(value) {
const index_true = regex.test(value);
console.log(index_true);
});
^^so this is what I got
so i'd need to test if it's true every time and return the index of it? I don't know how to go about it..
as to tari's help i got this :
Code: const fs = require('fs');
const homedir = require('os').homedir();
const prgmdir = homedir+'/.CalcBucket';
const tmpdir = prgmdir+'/tmp';
const indexcache = tmpdir+'/master.index'
var index = fs.readFileSync(indexcache).toString();
index = index.split(/^Index of/g).map(s => s.split('\n'));
console.log(index);
but it's unformatted, can i split this into separate vars to fix that?
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