compare

问题 I'm using the sort() function in C++ to sort a vector of objects of type 'Game', which I defined myself. To do this, I am manually writing a function that will act in place of the operator< , and which will be passed as the third parameter to the sort() function. First, I compare based on scores. Then, if scores are tied, I compare based on team name. What I need is a function alphabetical(string s1, string s2) , that will return true if s1 would come before s2 in the dictionary. For example:

问题 How can I compare two variable strings, would it be like so: $myVar = "hello"; if ($myVar == "hello") { //do code } And to check to see if a $_GET[] variable is present in the url would it be like this" $myVars = $_GET['param']; if ($myVars == NULL) { //do code } 回答1: $myVar = "hello"; if ($myVar == "hello") { //do code } $myVar = $_GET['param']; if (isset($myVar)) { //IF THE VARIABLE IS SET do code } if (!isset($myVar)) { //IF THE VARIABLE IS NOT SET do code } For your reference, something

问题 How do I compare two objects of a custom class in Objective-C? I try to overloading the - (NSComparisonResult)compare:(id)other; method. This works great if I call the method manually if ([obj1 compare:obj2] == NSOrderedDescending) { // do something } Is there any way that I can do it like this? if (obj1 > obj2) { // do something } Or is there another method that I need to overload? 回答1: This is not possible, since objective C doesn't have operator overloading. You are comparing pointer

问题 So I have a list of dates: [datetime.date(2013, 7, 9), datetime.date(2013, 7, 12), datetime.date(2013, 7, 15), datetime.date(2013, 7, 18), datetime.date(2013, 7, 22), datetime.date(2013, 7, 25)] And I know today is: date.today() For the sake of this post, today is datetime.date(2013, 7, 15) I need to be able to generate a list of any future dates, including today if it's on the list. The return statement would be: [datetime.date(2013, 7, 15), datetime.date(2013, 7, 18), datetime.date(2013, 7,

问题 I need to find all strings in B that "partly" exists in A. B = [ "Hello World!", "Hello Stack Overflow!", "Foo Bar!", "Food is nice...", "Hej" ] A = [ "World", "Foo" ] C = B.FuzzyCompare(A) // C = [ "Hello World!", "Foo Bar!", "Food is nice..." ] I've been looking into using Levenshtein Distance Algorithm for the "fuzzy" part of the problem, as well as LINQ for the iterations. However, A * B usually results in over 1,5 billion comparisons. How should i go about this? Is there a way to quickly

问题 I noticed in premium edition Data menu with Data Compare option which does everything I need. Just wondering whether there is a way to automate what's done in GUI from my application. Ideally I'd like to get collections of different/left/right rows 回答1: In this blog I’ll lead you through the various parameters for the “Data.NewDataComparison” ... http://blogs.msdn.com/b/psirr/archive/2008/11/22/data-compare-dte-commands.aspx 回答2: Start here with VSDBCMD.EXE. Then see Schema Compare DTE

问题 I'm not looking for a comparison of two structs that returns bool, I am wondering if there is a way to get which fields of two structs (the same structure, but maybe different values) are different. Basically I want a simpler way to do the following: public class Diff { public String VarName; public object Val1; public object Val2; public Diff(String varName, object val1, object val2) { VarName = varName; Val1 = val1; Val2 = val2; } public override string ToString() { return VarName + "

问题 So lets say I have a table with about 180 columns and 100 records. This table is backed up into temporary table and original one is removed. After this migration (change) is run on a pipeline which produces the same table. I want to compare the backed up table to the new one adn rows (records) with any difference to be moved to 3rd table (_result table) so I do: INSERT OVERWRITE TABLE zakj_customers.customers_detail_result SELECT acct_id, IF (a.title != b.title, 1, 0) title, IF (a.fname != b

问题 So lets say I have a table with about 180 columns and 100 records. This table is backed up into temporary table and original one is removed. After this migration (change) is run on a pipeline which produces the same table. I want to compare the backed up table to the new one adn rows (records) with any difference to be moved to 3rd table (_result table) so I do: INSERT OVERWRITE TABLE zakj_customers.customers_detail_result SELECT acct_id, IF (a.title != b.title, 1, 0) title, IF (a.fname != b

问题 So here is my issue I am comparing new and old values when a table row is being updated. But the new or old value will sometimes be null. So the code below doesn't work. Can can I remedy this issue? Thank You BEFORE UPDATE ON mytable FOR EACH ROW BEGIN IF OLD.assignedto != NEW.assignedto THEN INSERT INTO history ( asset , changedfield , oldvalue , newvalue ) VALUES ( NEW.asset, 'assignedto', OLD.assignedto, NEW.assignedto ); END IF; END$$ 回答1: Try: IF ( (OLD.assignedto IS NOT NULL AND NEW