coding-style

问题 Which of the following is best practice in Objective-C? UITableView* view = (UITableView*) [self view]; [view setSeparatorColor:[UIColor blackColor]]; [view release]; vs. ((UITableView*) self.view).separatorColor = [UIColor blackColor]; Or is there a better way of writing this? self.view is a UIView* . I'm asking both because I have a weird looking cast (maybe there's a better way?) and because of the following text from the official documentation, which hints that it's more than just a

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Sun's "Code Conventions for the Java Programming Language" was last updated April 1999. Ten years later a lot has changed in the

问题 This question already has answers here : What is the general syntax of a Unix shell command? (4 answers) Closed 4 years ago . It seems that most (a lot of) commands implement option arguments like this: if a short option requires an option argument, the option is separated by a space from the option argument, e.g. $ head -n 10 if a long option requires an option argument, the option is separated by a = from the option argument, e.g. $ head --lines=10 Is this some sort of convention and yes,

问题 This question already has answers here : What is the general syntax of a Unix shell command? (4 answers) Closed 4 years ago . It seems that most (a lot of) commands implement option arguments like this: if a short option requires an option argument, the option is separated by a space from the option argument, e.g. $ head -n 10 if a long option requires an option argument, the option is separated by a = from the option argument, e.g. $ head --lines=10 Is this some sort of convention and yes,

问题 Is there a particular scenario where a WriteOnly property makes more sense then a method? The method approach feels much more natural to me. What is the right approach? Using Properties : Public WriteOnly Property MyProperty As String Set(ByVal value as String) m_myField = value End Set End Property public string MyProperty { set{ m_myField = value;} } Using Methods : Public Sub SetMyProperty(ByVal value as String) m_myField = value End Sub public void SetMyProperty(string value) { m_myField

问题 I want to merge two dictionaries A and B such that the result contains: All pairs from A where key is unique to A All pairs from B where key is unique to B f(valueA, valueB) where the same key exists in both A and B For example: def f(x, y): return x * y A = {1:1, 2:3} B = {7:3, 2:2} C = merge(A, B) Output: {1:1, 7:3, 2:6} It feels like there should be a nice one-liner to do this. 回答1: Use dictionary views to achieve this; the dict.viewkeys() result acts like a set and let you do

问题 I've recently trying to build a simple android project. It will play a sound when the user click a button. When it was successfully compiled, the sound won't come off. I think it is the source code, but I don't know where the mistakes are Here is my source code : package com.jason.shootemup; import java.util.Random; import android.app.Activity; import android.media.MediaPlayer; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget

问题 This question may be asked or answered before but I feel that none of the hits really apply. I would like to create a little class with attributes which will correspond to name and attributes in a output familiar to xml stream. The class should help the program to create a xml-alike string. string test = "<graph caption='SomeHeader' attribute9='#someotherinfo'>" + "<set name='2004' value='37800' color='AFD8F8' />" + "<set name='2005' value='21900' color='F6BD0F' />" + "<set name='2006' value=

问题 I am trying to export some dynamic content into a PDF file with a small bit of page formatting. I'd like to have the PDF pages have a small padding with a border and then inside that border, a small company logo should appear up the top right on each page. Now the issue is that because the content is dynamic, the number of pages and content per page can vary. This means I can't manually create a DIV with a border and an image inside because the content could be more or less pages depending on

问题 When setting a variable to reference a function in a multi-line declaration, should it be followed by a semicolon. Take the folling for example: function sayHi(name) { (window.console && console.log || alert)('Hello ' + name); } var sayBye = function(name) { (window.console && console.log || alert)('Cya ' + name); }; Should there be a semicolon after the second declaration as it fits with a var keyword, on the other hand, function definitions don't usually have a semicolon at the end. 回答1: