ruby - When to use blocks -


I love Ruby Blocks! The idea behind them is very clean and convenient.

I have just seen my code back in the last week or again, which is basically I have ever written in every Ruby function , and I have noticed that among them Nobody gives a price! Instead of returning values, I always use a block to send back the data!

I have noticed myself writing a small status class which allows me to write code: 

  some.v_stuffing. Position | Status.success # Successful code end position. The file # puts the failed code in position. End of terrorism end

Am I using too many blocks? Is it time to use the blocks and have time to use the return value?

Do you have any information? Will the blocks be of great use and will I ever cut off?

The whole thing will be more readable as: 

  . Do_stuff #Unforced code is the second #Unffective code end

or to use a common rail idiom: 

  If the user.save render: Action = >: User. Errors.Each | ARR, msg | Code blocks are overuse when IOMHO, avoid the return of the Boolean value. Login-In. In "# {attr} - # {msg}"} Render: Action =>: Edit End

A block is understandable if . .

This code allows the resource to be used without closing the resource 

  open ("fname"). F | There is no need to worry about closing the file # with the file # #

The calling code must be calculated with non-trivial result

this In the situation, you avoid adding return values ​​to the calling area. This is also understandable with many values ​​at times. 

  Something to do. Res1, res2 | If res1.foo? And res2.bar? Foo (res1) elsef res2.bar? Bar (Ridge 2) End End # has given no reset to the code

in the scope to call

You can see some Rail Helpliers : 

  & lt% content_tag: div do%> & lt% = content_tag: duration "span content"%> & lt% end -%>

And of course iterator are a great use case, because they are more beautiful than for loops or <(considered as ruby-ists).

Definitely not a complete list, but I suggest that you can not use only blocks because you can.


Comments

Post a Comment

Popular posts from this blog

sql - dynamically varied number of conditions in the 'where' statement using LINQ -

I am using my first project LINQ (in mvc), so maybe there's something very simple that I remember. However, a day of searching and experimenting does not work, so it works. I am trying to write a LINQ query (Linux to SQL) in which in many cases where the statement is different from an OR or an AND. We do not know how many conditions are going in the query till runtime. This search is for filter control, where the user can choose multiple criteria for filtering. Select from table where table.col = 1 or table.col = 2 or table.col = 7 .... 'Other number of conditions Before I just create the SQL query as a string, while looping over all the situations. However, it seems that there should be a good way to do this in LINQ. I tried to use Expression trees, but they had a second thought for this moment on my head, where the lambda function was to be executed inside the statement such as: values ​​for matchingRows = matchingRows for each value Where (function (row) row.c...
Read more

asp.net mvc - Dynamically Generated Ajax.BeginForm -

I have a problem with ASP.NET MVC Ajax forms. I generate many Ajax form in a table such as: & Lt; Input type = "submit" name = "activity" value = "add activity" / & gt; & Lt;%}% & gt; & Lt; / TD & gt; & Lt; / TR & gt; & Lt;%}% & gt; So far so good. When I post one of those forms, it gives a partial view in a div, and in this new partial view a new Ajax Beginnform (which is not in Genesis form) This second Ajax Beginnorf is exactly like the ones I got on the table, but when I post it, I do not get the "Ajax Post", but a normal post that sends me to a new page, I do not know whether the two Ajax forms What is the reason for the difference between, why is it the "dynamically generated" Ajax form behaves like a normal HTML form? By the way, I know that I can do it in different ways using javascript, but I would like to understand whether it can only be done using MVC helplars and Ajax lib...
Read more

Debug on symbian -

I am using trk for phone debug This works well for the Holorld project But when I start the project in phone debug mode 1) the load failed 2) TrkProtocolPlugin: to target the specified file Failure (please verify If any body understands what problem I am experiencing, then this problem helps me Pre-release If the application has the privileges assigned (with the appropriate certificate) itemprop = "text" > In your case, I will check: / li> If there is no conflict of application ID with any other application of device If there are problematic commands in the installation package (for example copy copy for non-accessible directories)
Read more