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] }
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
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
Because the language spec says so: http://docs.oracle.com/javase/specs/jls/se7/html/jls-6.html A declaration introduces an entity into a program and includes an identifier (ยง3.8) that can be used in a name to refer to this entity. A declared entity is one of the following: … A local variable, one of the following: * A local variable declared in a … Read more
jQuery(‘#main’).css(‘opacity’) = ‘0.6’; should be jQuery(‘#main’).css(‘opacity’, ‘0.6’); Update: http://jsfiddle.net/GegMk/ if you type in the text box. Click away, the opacity changes.