Braces define an anonymous function, called a block. Tokens between the pipe are the arguments of this block. The number of arguments required depends on how the block is used. Each time the block is evaluated, the method requiring the block will pass a value based on the object calling it. It’s the same as … Read more
What does 64MB block size mean? The block size is the smallest data unit that a file system can store. If you store a file that’s 1k or 60Mb, it’ll take up one block. Once you cross the 64Mb boundary, you need a second block. If yes, what is the advantage of doing that? HDFS … Read more
I offer up my own explanation from this answer, slightly modified: “Blocks” in Ruby are not the same as the general programming terms “code block” or “block of code”. Pretend for a moment that the following (invalid) Ruby code actually worked: def add10( n ) puts “#{n} + 10 = #{n+10}” end def do_something_with_digits( method … Read more
Your code will work fine: the weak reference will not cause a retain cycle as you explicitly instruct ARC not to increase the retainCount of your weak object. For best practice, however, you should create a strong reference of your object using the weak one. This won’t create a retain cycle either as the strong … Read more
Updated [Oct 2016]: Flexbox version… form { display: flex; } form input[type=”text”] { flex: 1; } <form> <label>Name</label> <input type=”text” /> <button>Submit</button> </form> <p>Lorem ipsum…</p> Original answer [Apr 2011]: Table-less CSS version (of table behavior)… <div id=”parent”> <div id=”inner”> <label>Name</label> <span><input id=”text” type=”text” /></span> <input id=”submit” type=”button” value=”Submit” /> </div> <p>some paragraph text</p> </div> CSS… … Read more
You can reference the block explicitly def discard(&block) self – self.keep(&block) end or implicitly def discard self – self.keep(&Proc.new {}) end In your case, I would suggest the first approach.
Paste this code: def evaluate(&block) @self_before_instance_eval = eval “self”, block.binding instance_eval &block end def method_missing(method, *args, &block) @self_before_instance_eval.send method, *args, &block end For more information, refer to this really good article here
-ErrorAction Stop is changing things for you. Try adding this and see what you get: Catch [System.Management.Automation.ActionPreferenceStopException] { “caught a StopExecution Exception” $error[0] }
Block elements should always be centered using .block { margin-left: auto; margin-right: auto; width: 600px; } as stated by the w3c: http://www.w3.org/Style/Examples/007/center.en.html#block text-align: center; is well-named: use it to center texts. Update You can also use display: flex now: .parent { display: flex; justify-content: center; } .block { width: 200px; }
You need to wrap your closure signature in parentheses to make the closure itself optional. The way it’s written now, the closure returns an optional Void (which doesn’t really make sense). var completionHandler: ((sucsess:Bool!, items:[AnyObject]!)->())? Some style points and revisions to your example code: // Capitalize class names so it’s clear what’s a class class … Read more