code-reuse | 易学教程

C# reusable function to dump current value of local variables

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问题 I would like to write a reusable function I can call within any method to log a snapshot of all the local variables. For example: void somemethod() { int a = 1; string s = "something"; dumpLocalVariables("step 1", MethodInfo.GetCurrentMethod(), this); a++; string t = s + "else"; dumpLocalVariables("step 2", MethodInfo.GetCurrentMethod(), this); } I would like to get a console output like this: step 1 Int32 a = 1 String s = something step 2 Int32 a = 2 String s = something String t =

How do I index and make available reusable code? [closed]

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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 . I have many small files containing code fragments, pseudo-code algorithms, classes, templates, SQL-samples, etc., and I obviously

Does a library to prevent duplicate form submissions exist for django?

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问题 I am trying to find a way to prevent users from double-submitting my forms. I have javascript that disables the submit button, but there is still an occasional user who finds a way to double-submit. I have a vision of a re-usable library that I could create to protect from this. In my ideal library, the code block would look something like this: try: with acquire_lock({'field1':'abc', 'field2':'def'}) as lock: response = #do some credit card processing lock.response = response except

Add rounded corners to all UIImageViews

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问题 I would like to add some rounded corners to all of the UIImageViews in my project. I have already got the code working, but am having to apply it to every image; should I subclass UIImageView to add this? If so, can someone give me some pointers as to how to do this? Here is the code - (void)viewDidLoad { [super viewDidLoad]; NSString *mainpath = [[NSBundle mainBundle] bundlePath]; welcomeImageView.image = [UIImage imageWithContentsOfFile:[mainpath stringByAppendingString:@"/test.png"]];

How do you make code reusable?

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问题 Any code can be reused in a way or an other, at least if you modify the code. Random code is not very reusable as such. When I read some books, they usually say that you should explicitly make the code reusable by taking into account other situations of code usage too. But certain code should not be an omnipotent all doing class either. I would like to have reusable code that I don't have to change later. How do you make code reusable? What are the requirements for code being reusable? What

How would you implement a “trait” design-pattern in C#?

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问题 I know the feature doesn\'t exist in C#, but PHP recently added a feature called Traits which I thought was a bit silly at first until I started thinking about it. Say I have a base class called Client . Client has a single property called Name . Now I\'m developing a re-usable application that will be used by many different customers. All customers agree that a client should have a name, hence it being in the base-class. Now Customer A comes along and says he also need to track the client\'s

Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an INSERT-EXEC statement.” How to solve this?

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I have three stored procedures Sp1 , Sp2 and Sp3 . The first one ( Sp1 ) will execute the second one ( Sp2 ) and save returned data into @tempTB1 and the second one will execute the third one ( Sp3 ) and save data into @tempTB2 . If I execute the Sp2 it will work and it will return me all my data from the Sp3 , but the problem is in the Sp1 , when I execute it it will display this error: INSERT EXEC statement cannot be nested I tried to change the place of execute Sp2 and it display me another error: Cannot use the ROLLBACK statement within an INSERT-EXEC statement. This is a common issue when

What is the purpose of Android's <merge> tag in XML layouts?

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问题 I\'ve read Romain Guy\'s post on the <merge /> tag, but I still don\'t understand how it\'s useful. Is it a sort-of replacement of the <Frame /> tag, or is it used like so: <merge xmlns:android=\"....\"> <LinearLayout ...> . . . </LinearLayout> </merge> then <include /> the code in another file? 回答1: <merge/> is useful because it can get rid of unneeded ViewGroups, i.e. layouts that are simply used to wrap other views and serve no purpose themselves. For example, if you were to <include/> a