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What do they mean? Why sometimes I should use block and other times &block inside functions that accept blocks?
Started by collimarco on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Def foo(block = nil) p block end foo # => nil foo("test") # => test foo { puts "this block will not be called" } #....
block is just a local variable, &block is a reference to the block passed to the method.
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Is it possible for a lambda, proc, method or other type of block in ruby, to yield to another block?
something like...
a = lambda { puts 'in a' yield if block_given? } a.call { puts "in a's block" }
this doesn't work... it just produces in a => nil...
Started by Derick Bailey on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
A = lambda {|&block| block.call if block } a.call(lambda { puts "in a's block" })
In Ruby 1.9.1, you can have block parameters
a = lambda { |&block| puts '....
You can call the block, which is similar to yielding.
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How would you explain a simple mortal about blocking IO and non-blocking IO? I've found these concepts are not very clear among many of us programmers.
Started by victor hugo on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Other operations to be carried out while it does its thing and blocking i/o would block other moreover by the effort to schedule multithreaded programs when I/O could conceivably block only one.
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Ask your Facebook Friends
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I have seen many web framework provide non-blocking web server, i just want to know what it mean.
Started by vernomcrp on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
So, you can process any results.
"block") until the full socket operation has taken place.
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Non-blocking TCP/IP SocketChannels and Selector in NIO help me to handle many TCP/IP connections with small number of threads. But how about UDP DatagramChannels? (I must admit that I'm not very familiar with UDP.)
UDP send operations don't seem to block...
Started by Trustin Lee on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
UDP doesn't block (It only blocks while.
Since UDP does not know anything as if the channel is actually immediately ready for more sending .
Will only block for as long as it takes to flush the buffer out.
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A site I'm creating for a customer in D6 has various images overlaying parts of the main content area. It looks very pretty and they have to be there for the general effect.
The problem is, if you use this theme in the administration pages, the images...
Started by hfidgen on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
If you.
In this way you don't have to hack the core .
The block editing form to restore the target theme.
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Once upon a time I bumped into Introduction to Indy article and can't stop thinking about blocking vs non-blocking IO ever since then.
Looking for some good articles describing what are pros and cons of blocking IO and non-blocking IO and how to design...
Started by Piotr Dobrogost on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Well blocking IO means that a given thread ....
Non-blocking - Parallel programming, more difficult to code, more control.
The positives and negatives are pretty clear cut:
Blocking - Linear programming, easier to code, less control.
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I'm trying to optimize some slow web pages, and my guess is that the problem has to do with SQL blocking (doesn't seem to be a matter of CPU or I/O utilization on the web server or database server). What's the quickest way to find out what queries are...
Started by Herb Caudill on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
FROM master..sysprocesses p1 JOIN master..sysprocesses p2 ON p1.blocked = p2.spid
Remus: Activity monitor may time out under server load with error 1222
The MS KB 224453 has... .
Activity Monitor
SELECT p1.SPID AS blockedSPID, p2.SPID AS blockingSPID, .. .
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I found that, browsers don't block all pop-up JavaScript windows.
How to write pop-up windows in JavaScript that won't be blocked by browsers?
I mean what is the main factor that makes the difference?
Started by JMSA on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
JQuery UI Dialog that all pop-up blocker cannot block it because it just is html tag like span or div.
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My website's comment function is being constantly bombarded with spam posts from these two IP addresses:
94.102.63.11 83.233.30.42 I am currently blocking them at the text level since they all have:
weebly.com
in them, and I would think that if I block...
Started by Edward Tanguay on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
In some cases the IP.
The odds that you would block a valid, bone fide, user are slim .
It's likely, Yes, but...
It's easier for the spammers to switch address than it is for you to block them.
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