Runtime System: Node.js

node.js

H ZETT M & まらしぃ: 新曲

Logical Emotion (ろじえも): 千本桜

Patti LuPone: As If We Never Said Goodbye

Patti LuPone

Phantom JS: Creating PNG Image File of the Specified URL

Creating PNG image file of the specified URL

pagerender.js:
var page = require('webpage').create(),
  system = require('system'),
  address;

if (system.args.length <= 2) {
  console.log('Usage: pagerender.js <some URL> <image name>');
  phantom.exit();
}

address = system.args[1];
image = system.args[2];

page.open(address, function(status) {
  console.log("Status: " + status);
  if(status === "success") {
    page.render(image);
  }
  phantom.exit();
});

Command:

$ phantomjs pagerender.js http://smashingtheory.blogspot.com test.png

Headless Browser: PhantomJS

PhantomJS

Natalie Cole: Miss You Like Crazy

Source Code Editor: Sublime Text

Sublime Text

Package Manager: Homebrew

Homebrew

Homebrew: Installing Homebrew Package Manager on OS X 10.11.3

Installing a package manager Homebrew on Mac OS X 10.11.3:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Perl: iTunes XML to CSV (Without XML Parser)

itunes.pl

use constant MODE_NONE => 0;
use constant MODE_FIND_BRAKET_NAME => 1;
use constant MODE_FIND_VALUE =>2;
use constant FALSE =>0;
use constant TRUE => 1;

$mode = MODE_NONE;
$tagName = "";
$value = "";
$keyValue = "";
$openTag = FALSE;
$closeTag = FALSE;
$isTrack = FALSE;

@itunestags = ("Track ID","Name","Artist","Album Artist","Composer","Album","Grouping","Kind","Size","Total Time","Disc Number","Disc Count","Track Number","Track Count","Year","Date Modified","Date Added","Bit Rate","Sample Rate","Play Count","Play Date","Play Date UTC","Skip Count","Skip Date","Release Date","Rating","Album Rating","Album Rating Computed","Normalization","Artwork Count","Persistent ID","Track Type","Protected","Purchased","Location","File Folder Count","Library Folder Count");

print "Track ID,Name,Artist,Album Artist,Composer,Album,Year\n";

while (defined($char = getc())){

        if ($char eq "<"){
                $mode = MODE_FIND_BRAKET_NAME;
                $tagName = "";
        }elsif ($char eq ">"){
                if ($closeTag)
                {
                        if ($value eq "Tracks"){
                                $isTrack = TRUE;
                        }elsif ($value eq "Playlists"){
                                $isTrack = FALSE;
                        }elsif ($value ~~ @itunestags){
                                $keyValue = $value;
                        }else{
                                $value =~ s/"/""/g;

                                if ($value =~ /[,"]/){
                                        $value = "\"" . $value . "\"";
                                }

                                $value =~ s/&#38;/&/g;

                                if ($keyValue ~~ @itunestags){
                                        $track{$keyValue} = $value;
                                }
                        }

                        if ($isTrack && $tagName eq "dict"){
                                printf "%s,%s,%s,%s,%s,%s,%s\n", $track{'Track ID'}, $track{'Name'}, $track{'Artist'}, $track{'Album Artist'}, $track{'Composer'}, $track{'Album'},$track{'Year'};
                                $keyValue ="";
                                %track=();

                        }

                        $value = "";
                        $closeTag = FALSE;
                }else{
                        $mode = MODE_FIND_VALUE;
                        $value = "";
                }
        }else{
                if ($mode == MODE_FIND_BRAKET_NAME){
                        if ($char eq "/"){
                                $closeTag = TRUE;
                        }else{
                                $tagName .= $char;
                        }
                }elsif($mode == MODE_FIND_VALUE){
                        $value .= $char;
                }
        }
}

Bash command:

$ cat ./itunes.xml | perl ./itunes.pl

AWK: Printing CSV file

printing CSV file:

csv.awk:

{
        readcsv($0);
        print $2" by "$3;
}

function readcsv(string)
{
        #フィールド番号
        n=1;

        #コンマ区切り
        m=split(string, array , ",");

        #完全フィールドか否か
        aflag=1;

        for(i=1;i<=m;i++){
                # "  "で括られていない完全フィールド。
                if( !(array[i] ~ /^\"/) && !(array[i] ~/\"$/) && aflag){
                        #ダブルクオートのエスケープ文字を削除
                        gsub(/\"\"/,"\"", array[i]);

                        $n=array[i];
                        n++;
                        continue;
                }

                # "  "で括られている完全フィールド
                if(( array[i] ~ /^\".*\"$/ ) && aflag){
                        #先頭と末端にあるダブルクオートを削除する
                        gsub(/^\"/,"", array[i]);
                        gsub(/\"$/,"", array[i]);
                        #ダブルクオートのエスケープ文字を削除
                        gsub(/\"\"/,"\"", array[i]);

                        $n=array[i];
                        n++;
                        continue;
                }

                # 先頭が "の部分フィールド
                if(array [i] ~ /^\"/){
                        #先頭のダブルクオートを削除
                        gsub(/^\"/,"", array[i]);
                        #ダブルクオートのエスケープ文字を削除
                        gsub(/\"\"/,"\"", array[i]);

                        aflag=0;
                        $n=array[i];
                        continue;
                }

                # "  "で括られていない、続きの部分フィールド。
                if(!(array[i] ~ /^\"/) && !(array[i] ~/\"$/) && aflag==0){
                        #ダブルクオートのエスケープ文字を削除
                        gsub(/\"\"/,"\"", array[i]);

                        $n = $n "," array[i];
                        continue;
                }

                # 末端が "の部分フィールド
                if((array [i] ~ /\"$/) && aflag==0){
                        #末端のダブルクオートを削除
                        gsub(/\"$/,"", array[i]);
                        #ダブルクオートのエスケープ文字を削除
                        gsub(/\"\"/,"\"", array[i]);

                        $n = $n "," array[i];
                        aflag=1;
                        n++;
                        continue;
                }
        }
}

Bash command:

$ cat list.csv | awk -f ./csv.awk

AWK: FS, RS, OFS, ORS

Testing FS (field separator), RS (record separator), OFS (output field separator), ORS (output record separator):

Command:

$ echo -n '"test,test",testtest,test,test' | awk 'BEGIN{FS=",";RS="\n";OFS="-";ORS="+"}{print $1, $2, $3, $4, $5, $6}'


Output:

"test-test"-testtest-test-test-+

AWK: split Function

Testing the behavior of split function in awk:

$ echo -n 'test,test,test' | awk '{m=split($0,array,",")}{print m}'
3