reference

问题 ap = Array.prototype, aps = ap.slice, apsp = ap.splice, I often see code like above in different frameworks. What are the benefits of this? Why not use it directly? 回答1: Several benefits: Faster at run-time (fewer lookups to get the final result) Smaller code before minification Easier to reduce even more with minification Less typing when coding One should note that I think it makes the code less readable to people not already familiar with the code or its conventions because the code isn't

问题 I'm new to C but I've programmed in pascal a few weeks ago. In pascal, if you want to change an arrays data, you pass by reference, by typing var myArray essentially. I can't figure out how to do this in C. I've read a ton of questions but none seem to work. Here's what I have so far. void set_up_elements(char (*array_to_populate)[20]) { char* buffer; FILE *f; f=fopen("elementList.txt","r"); char copied_text[118][20]; int i=0; while (!feof(f)) { fgets(copied_text[i],80,f); ++i; } //Close the

问题 I have a following code def hidePasswords(L, password): for elem in L: if elem == password: elem = "*"*len(password) return L print(hidePasswords(["test","test1","test8"],"test")) It returns ['test', 'test1', 'test8'] instead of ['****', 'test1', 'test8'] . When I change my function to def hidePasswords(L, password): temp = [] for elem in L: if elem == password: elem = "*"*len(password) temp.append(elem) return temp it works correctly. Why does Python behaves in such a way? I perfectly

问题 I'm using python 2.7.2 with built-in IDLE on windows 7 x64, and found a very strange thing: >>> a = "aaa" >>> b = "aaa" >>> print a is b True >>> print a == b True >>> print "%s , %s" % (id(a), id(b)) 43872224 , 43872224 >>> This is normal, but, if the string contains a space: >>> x = "x x" >>> y = "x x" >>> print x is y False >>> print x == y True >>> print "%s , %s" % (id(x), id(y)) 43872008 , 43872128 >>> Notice x is y is False ! And they have different ids! I tried these code in PyCharm,

问题 I have had this Warning lingering around the background of my project for quite a while now and I was told not to worry about it. However now I have other issues I figure now is probably the best time to enquire about it. (The best time was probably when I first occurred, but hey, too late for that now.) There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\Users\Benjamin\Documents\Visual Studio 2010

问题 I have created console application on VS 2008, the console app use another exe file(using command line). I would like to add that exe file to my console application. Now I have one problem, if I build project I need to copy exe file manually to build folder. Regards, Tomas 回答1: Add the .exe to your solution. Then in the solution explorer : richt clik on the exe file and choose properties In the properties: Copy to output folder : Copy if newer 来源： https://stackoverflow.com/questions/2243054

问题 I'm having a piece of code where in a subroutine I have a hash and I push it's reference to an array. Then I return that array: sub subroutine1 { my @arr; my %hash = ("a", "b", "c", "d"); foreach $key (keys %hash) { #I'm doing something } push @arr, \%hash; return @arr; } But later when I use the return value of the subroutine, this value is the hash reference instead of an array that contains one element which is a hash reference. So the code above could work for me without bothering to put

问题 I'm having a piece of code where in a subroutine I have a hash and I push it's reference to an array. Then I return that array: sub subroutine1 { my @arr; my %hash = ("a", "b", "c", "d"); foreach $key (keys %hash) { #I'm doing something } push @arr, \%hash; return @arr; } But later when I use the return value of the subroutine, this value is the hash reference instead of an array that contains one element which is a hash reference. So the code above could work for me without bothering to put

问题 I am currently trying to add an assembly into report builder 3.0 to execute a method and return the result: But I always get "#Error" in the preview. Even whe the method is that simple: public static string Test() { return "test"; } Reference is set the following: Expression is: =TestNamespace.TestClass.Test() The assembly is registered in GAC and it seems that the method is being checked for availableness. Elsewise I get a different error. 回答1: I finally fixed it. Important is to set the

问题 i have 3 tables Table: A - aID - Text Table: B - bID - Text Table: A_B (reference table which holds both of the primary keys as foreign keys) - aID - bID The Entity Framework knows that Table A_B is just a reference table and does not create it in the DBModel but keeps the references in Table A and B. My question is how do i get the data which is in the reference table without actually having this table? When i try to access the values of Table B using the reference which is in Table A i cant