Modulo adjustment

If you open MDN pages, describing Math.ceil, Math.floor, and Math.round, you will find the good example of the adjustment and rounding based on the decimal logarithm. For exdample, Math.ceil10(55, 2) returns 100 where 2 expresses an exponent for 10^2.

Besides of logarithmic adjustment we can use modulo based adjustment. It is almost the same as above but uses an arbitrary number for adjustment.

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Continuing long lines in a batch script

Unintentionally I found for myself that a batch script has a nice feature to break long lines without loosing of possibility of reading them.

Imagine, you have some weird combination of commands as below that is not put completely in one line of a screen.

some-command-with-many-arguments | another-lomg-command-with-its-own-arguments | etc | etc | etc

If the line of a code cannot be shown within one line on a screen it will be i) either turned and the rest of line will be shown below on one or more lines or ii) continued out of edges of the screen with a horizontal scrolling bar. Both of them are not convenient because we not able to observe the code entirely.

Fortunately, modern batch scripts (in XP, Vista, Win7) have blocks implemented by brace:

(
    some-command-with-many-arguments 
) | (
    another-long-command-with-its-own-arguments 
) | etc | etc | etc

I known this feature (because I used brace in the if-else and for statements) but did not realised right now.

So, this gives us good possibility to break the long line into a several lines without loosing of functionality. This is better than nothing and is better than undocumented feature using the DOS-like escaping character ^ at the very ending of the line because you have to look after that this character is in the lastest character of the line. See the same example with the esacaping character:

some-command-with-many-arguments | ^
another-long-command-with-its-own-arguments | ^
etc | etc | etc

Unix shell scripts are featured to continue long commands using by backslashes since the begining of the Unix wolrd.

some-command-with-many-arguments \
| another-long-command-with-its-own-arguments \
| etc | etc | etc

How to concatenate multiple lines in console (bash, cmd)

If for some reasons you need to have concatenated lines try one of the recipes below.

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Merge and sort many logfiles having multiline entries

logmerge is the small and powerful script to merge two or more log files so that multiline entries appear in the correct chronological order without breaks of entries. Optional arguments control an adding of descriptive fields at the beginning of each line in the resulting combined logfile. Reading of .gz/.bz2 files is available.

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Regular Expression Analyzer

Neat online tool. Regular expressions are described in the human-friendly style.

Regular Expression Analyzer

Universal way to identify your external IP and more

There are many such kind of resources in Internet but this is the best. It allows the numerous structured data and it has nice name. Meet http://ifconfig.me/.

Command line interface

Using curl

curl ifconfig.me

or wget

wget -qO - ifconfig.me/ip

JScript

JS

var xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
xmlhttp.open('GET', 'http://ifconfig.me/ip', false);
xmlhttp.send();
 
var ip = xmlhttp.responseText;

JS+XML

var xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
xmlhttp.open('GET', 'http://ifconfig.me/all.xml', false);
xmlhttp.send();
 
var ip = xmlhttp.responseXml.getElementsByTagName('ip_addr')[0].text;

Having JSON library you can read and parse JSON data:

var xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
xmlhttp.open('GET', 'http://ifconfig.me/all.json', false);
xmlhttp.send();
 
var data = JSON.parse(xmlhttp.responseText);
var ip = data.ip_addr;

VBScript

Dim xmlhttp, ip
 
Set xmlhttp = CreateObject("Microsoft.XMLHTTP")
xmlhttp.open "GET", "http://ifconfig.me/ip", False
xmlhttp.send
 
ip = xmlhttp.responseText

Artist/Album Info in Foobar2000

foobar2000 is perfect mediaplayer for Windows platforms. It is kind of those applications whose functionality is extendable simply adding plugins. One of these finest plugins is Run services that allows to run external applications and scrpts from within foobar2000.

I use Run services to view/edit information about albums or artists stored in plain text files. Let's consider how it is possible.

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Версии Internet Explorer

Нечасто, но иногда на странице требуется программно определить какой же браузер и какой версии используется. Для этого существует несколько способов определения.

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parseDate

Функция преобразует дату, заданную строкой, в количество миллисекунд относительно базового времени, и возвращает его. Строка должна содержать дату и время в определенном формате. Функция аналогична стандартному методу Date.parse. Отличие заключается в том, что корректно обрабатывает строки, содержащие миллисекунды.

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Обмен данными и объектами между скриптами

Однажды на Сером форуме шло обсуждение как можно осуществить обмен данными между скриптами. Идея основана на создании нового экземпляра, наследуемого от интерфейса IWebBrowser2 (ссылка: IWebBrowser2 Interface). Объект хранит в себе данные даже после завершения всех скриптов, практически как буфер обмена, и может служить как средство обмена данными и объектами между скриптами.

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