RSS 2.0
Sign In
# Monday, 28 April 2014

Among proposed new features (other than Maps and Arrays) in XPath 3.1 we like Arrow operator (=>).

It's defined like this:

[Definition: An arrow operator is a postfix operator that applies a function to an item, using the item as the first argument to the function.] If $i is an item and f() is a function, then $i=>f() is equivalent to f($i), and $i=>f($j) is equivalent to f($i, $j).

This syntax is particularly helpful when conventional function call syntax is unreadable, e.g. when applying multiple functions to an item. For instance, the following expression is difficult to read due to the nesting of parentheses, and invites syntax errors due to unbalanced parentheses:

tokenize((normalize-unicode(upper-case($string))),"\s+")

Many people consider the following expression easier to read, and it is much easier to see that the parentheses are balanced:

$string=>upper-case()=>normalize-unicode()=>tokenize("\s+")

 What it looks like?

Right! It's like extension functions in C#.

Monday, 28 April 2014 06:20:27 UTC  #    Comments [0] -
xslt
All comments require the approval of the site owner before being displayed.
Name
E-mail
Home page

Comment (Some html is allowed: a@href@title, b, blockquote@cite, em, i, strike, strong, sub, super, u) where the @ means "attribute." For example, you can use <a href="" title=""> or <blockquote cite="Scott">.  

[Captcha]Enter the code shown (prevents robots):

Live Comment Preview
Archive
<2014 April>
SunMonTueWedThuFriSat
303112345
6789101112
13141516171819
20212223242526
27282930123
45678910
Statistics
Total Posts: 364
This Year: 9
This Month: 0
This Week: 0
Comments: 223
Locations of visitors to this page
Disclaimer
The opinions expressed herein are our own personal opinions and do not represent our employer's view in anyway.

© 2018, Nesterovsky bros
All Content © 2018, Nesterovsky bros
DasBlog theme 'Business' created by Christoph De Baene (delarou)