Re: SIGSEGV: Illegal storage access. (Attempt to read from nil?) 3

[nimboolean]

ISSUE RESOLVED.

I fixed the error by checking for attrsLen property like this:


import htmlparser
import xmltree
import strtabs
import strutils


let allhtml:File = open("allhtml.txt")
var line: string
var count = 0
while allhtml.readline(line):
  echo "HTML file: ", count, line
  let html = loadHTML(line.strip())
  for a in html.findall("a"):
if a.attrsLen > 0:
  let url = a.attrs.getOrDefault("href")
  if not url.isNil:
if url.startswith("/"):
  echo "$1\t$2" % [line, url]
  count += 1

close(allhtml)

Re: SIGSEGV: Illegal storage access. (Attempt to read from nil?) 3

[nimboolean]

nope. it did not make any difference.


import htmlparser
import xmltree
import strtabs
import strutils


let allhtml:File = open("allhtml.txt")
var line: string
var count = 0
while allhtml.readline(line):
  echo "HTML file: ", count, line
  var html = loadHTML(line.strip())
  for a in html.findall("a"):
var url = a.attrs.getOrDefault("href", "/")
if not url.isNil and url.startswith("/"):
  echo "$1\t$2" % [line, url]
  count += 1

close(allhtml)

SIGSEGV: Illegal storage access. (Attempt to read from nil?) 3

[nimboolean]

The code 


import htmlparser
import xmltree
import strtabs
import strutils


let allhtml:File = open("allhtml.txt")
var line: string

while allhtml.readline(line):
  echo "HTML FILE: ", line
  var html = loadHTML(line.strip())
  for a in html.findall("a"):
var url = a.attrs.getOrDefault("href", nil)
if not url.isNil and url.startswith("/"):
  echo "$1\t$2" % [line, url]

close(allhtml)



The error:


Traceback (most recent call last)
rewrite.nim(26)  rewrite
strtabs.nim(133) getOrDefault
strtabs.nim(104) rawGet
strtabs.nim(85)  myhash
SIGSEGV: Illegal storage access. (Attempt to read from nil?)

Re: nim-cookbook

[nimboolean]

Thanks! I'm still finding my way around Nim and this is helpful.

nim-cookbook

[nimboolean]

I have started writing a Nim Programming Cookbook similar to those in Python, 
Perl etc.,

The website is 
[http://nim-cookbook.btbytes.com](http://nim-cookbook.btbytes.com)/ . The 
source code to the cookbook is on github - 
[https://github.com/btbytes/nim-cookbook](https://github.com/btbytes/nim-cookbook)/

Please do share what topics you would like to see in the cookbook.

PRs welcome!

Re: Is Nim better than C?

[nimboolean]

**Language X** can be used as a replacement for C language(used as a better C), 
where **Language X** can be anywhere from C++, Java, D, Python, Go, OCaml, 
Erlang, Javascript etc., depending on what you are trying to do. Being better 
than C at _something_ is not that difficult. Today C is chosen mostly because 
old habits die hard, not because it's the "best language overall".

Re: QtCreator plugin

[nimboolean]

Hi @filcuc, I just downloaded the the latest from the above link.. It still 
doesn't have the nim parts.