compare

问题 I need to compare if two TStream descendant have the same content . The only interesting result for me is the boolean Yes / No. I'm going to code a simple loop checking byte after byte the streams content's. But I'm curious to know if there is an already existing function. I haven't found any inside DelphiXE or JCL/JVCL libs. Of course, the two streams have the same size ! 回答1: Exactly, as Nickolay O. said you should read your stream in blocks and use CompareMem. Here is an example (including

问题 I try to parse text and find some characters in it. I use the code below. It works with normal characters like abcdef but it does not work with öçşğüı . GCC gives compilation warnings. What should I do to work with öçşğüı ? Code : #include <stdio.h> #include <ctype.h> #include <string.h> int main() { char * text = "öçşğü"; int i=0; text = strdup(text); while (text[i]) { if(text[i] == 'ö') { printf("ö \n"); } i++; } return 0; } Warning : warning: multi-character character constant [-Wmultichar

问题 I'm using sort with a customized comparison subroutine I've written: sub special_compare { # calc something using $a and $b # return value } my @sorted = sort special_compare @list; I know it's best use $a and $b which are automatically set, but sometimes I'd like my special_compare to get more arguments, i.e.: sub special_compare { my ($a, $b, @more) = @_; # or maybe 'my @more = @_;' ? # calc something using $a, $b and @more # return value } How can I do that? 回答1: Use the sort BLOCK LIST

问题 This question already has answers here : How to compare two object variables in EL expression language? (2 answers) Closed 3 years ago . I'm giving a User object to JSP and want to compare an attribute of the user with a given String. What I'm doing right now is the following: <input type="radio" name="lang" value="ger" <c:if test="${user.comLanguage.equals("ger")}">checked="yes"</c:if>/>German</br> But all I get is the following Exception: org.apache.jasper.JasperException: /WEB-INF/jsp

问题 I have an application in which a code area produces NAN values. I have to compare the values for equality and based on that execute the rest of the code.How to compare two NAN values in C++ for equality? 回答1: Assuming an IEEE 754 floating point representation, you cannot compare two NaN values for equality. NaN is not equal to any value, including itself. You can however test if they are both NaN with std::isnan from the <cmath> header: if (std::isnan(x) && std::isnan(y)) { // ... } This is

问题 I'm experimenting with the SQL Schema Compare in Visual Studio 2012 Premium. How do I ignore the column order in the comparison? I found some posts that state this option was introduced in VS 2010, but I only see "Ignore column collation" the option in VS2012. (Discussion for vs2010) How do I ignore any differences in the names of the constraints in the comparison? The constraints should be present, but do not need to have the same name. 回答1: The ignore column order was removed for VS2012

问题 First of all, I am not from programming background and totally new to VBscript. For some reasons, I have to do a this scripting task at office. I want to use it with Quick Test Professional 11. I have gone through many posts here as well on other forums but not able to find the required information. Ok so here's what I need to do: I have to compare two text files and write the difference in third file. Both the files have almost same content aprt from some field, ie: Date, Order no and so on.

问题 I have two database , First Db is Microsoft SqlServer (version 2008 R2) and second database is DB2 i need a tool for comparing schema and tables in both ot them ? is every body have idea or solution ? 回答1: I think IBM Data Studio can do that. I don't know if it's the best tool, as you didn't say how you'd define "best". 回答2: I Found DB SOLO 4.2. Software on site : http://www.dbsolo.com/help/compare.html and i checked it . thanks your time 回答3: Try using the Toad or else you can also use SQL

问题 I need to compare 2 csv (huge files) row by row and write the difference rows in a separate file. The row in one file can be present anywhere in second file. I need to compare the entire row. Any pointers? 回答1: One common approach is to calculate hash code for each of the rows in one file (preferably the smaller one). Then put entire file into a hashtable. This will be the index of the smaller file. After that, walk through the larger file. For each row calculate its hash. Then look into the

问题 This question already has answers here : Find the row indexes of several values in a numpy array (5 answers) Closed 2 years ago . I have data from two different catalogs, I want to use the coordinates to match those two catalogs. The data I have is x1,y1,z1,a1,b1,c1,etc (about half million elements) from catalog 1, and x2,y2,z2,a2,e2,m2,n2,etc (about million elements) from catalog 2. What I am trying to do is first to construct a 2D array which contains (x,y) coordinates, if necessary I will