compare

参考JavaScript高级程序设计 在默认情况下，sort()方法按升序排列数组项--即最小的值位于最前面，最大的值排在最后面。为了实现排序，sort方法会调用每个数组项的toSting()转型方法，然后比较得到的字符串，以确定如何排序。即使数组中每一项都是数值，sort()方法 比较的也是字符串 ，如下所示： var values = [0,1,5,10,15]; values.sort(); alert(values); //0,1,10,15,5 可见，例子中的数组中值顺序没有问题，但sort()方法会根据字符串测试结果改变原来的顺序。因为即使数值5小于10，但在进行字符串比较时，“10”位于“5”前面，于是数组的顺序被修改了。 所以，这种排序方式在很多情况下都不是最佳方案。 因此sort()方法可以接收一个比较函数作为参数，以便我们指定哪个值位于哪个值的前面。 比较函数接收两个参数，如果第一个参数应该位于第二个之前则 返回一个负数 ，如果两个参数相等则返回0，如果第一个参数应该位于第二个参数之后则 返回一个正数 。以下是一个简单的比较函数: function compare(value1,value2) { if (value1 < value2) { return -1; } else if (value1 > value2) { return 1; } else {

EDIT: OK, OK, I misread. I'm not comparing an int to an Integer. Duly noted. My SCJP book says: When == is used to compare a primitive to a wrapper, the wrapper will be unwrapped and the comparison will be primitive to primitive. So you'd think this code would print true : Integer i1 = 1; //if this were int it'd be correct and behave as the book says. Integer i2 = new Integer(1); System.out.println(i1 == i2); but it prints false . Also, according to my book, this should print true : Integer i1 = 1000; //it does print `true` with i1 = 1000, but not i1 = 1, and one of the answers explained why.

Clicking on an element: $('.my_list').click(function(){ var selected_object = $(this); $('.my_list').each(function(){ var current_object = $(this); if( selected_object == current_object ) alert('FOUND IT !'); }); }); I don't know why, but I don't get the alert message "FOUND IT !". You can use the jQuery.is function: Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments. if (selected_object.is(current_object)) { ... } An alternate solution is to use jQuery.get function to get the raw

I wanted to compare a string without actually defining one of them as a string, something like this, if (string == 'add') Do I have to declare 'add' as a string or is it possible to compare in a similar way? In C++ the std::string class implements the comparison operators , so you can perform the comparison using == just as you would expect: if (string == "add") { ... } When used properly, operator overloading is an excellent C++ feature. You need to use strcmp . if (strcmp(string,"add") == 0){ print("success!"); } Algorithmist You could use strcmp() : /* strcmp example */ #include <stdio.h>

Ok a pretty simple question.. in c++ it seems to work but in objective-c i seem to struggle with it :S .. If you want to compare two arrays it should be something like this right for ( int i = 0; i < [appdelegate.nicearray count]; i++ ) { if ( appdelegate.nicearray[i] == appdelegate.exercarray[i] ) { NSLog(@"the same elements in this selection"); } } what's the problem exactly ? These are Cocoa array objects (instances of NSArray), not C arrays or C++ vectors, and remember that Objective-C does not have operator overloading. The only things you can do with an object are pass it around, store

Beyond Compare 4用一段时间后就会弹出这个： 因为Beyond Compare会定期联网验证你的密钥是否有效。 网上查找的解决方案基本是2步： 1、禁止Beyond Compare联网，配置防火墙出站规则就行（ http://www.xz7.com/downinfo/280960.html ） 2、删除BCState.xml，路径：C:\Users\xxx\AppData\Roaming\Scooter Software\Beyond Compare 4，xxx是当前登录用户名 但是最近不知道出了什么问题，明明禁止联网了，还是弹出密钥被吊销。。。 于是我对比了吊销前后的BCState.xml文件，发现多了一个节点<TCheckForUpdatesState>： 经过测试，只要删除该节点或子节点<CheckID>就没问题了。 如果直接删除BCState.xml整个文件，那在启动界面就不会显示自动保存的对比记录。 另外，子节点<LastChecked>顾名思义是记录最近一次验证时间，猜测一下，是否把值调到一个很大的时间，就不会再次校验了呢？（经验证，并不是） 来源： https://www.cnblogs.com/linys2333/p/11082353.html

I'm trying to compare two arrays and get only the values that exist on both arrays but, unfortunately, I can't find the right array function to use... I found the array_diff() function: http://php.net/manual/en/function.array-diff.php But it's for the difference of the both arrays. Example: $array1 = array("**alpha**","omega","**bravo**","**charlie**","**delta**","**foxfrot**"); $array2 = array("**alpha**","gamma","**bravo**","x-ray","**charlie**","**delta**","halo","eagle","**foxfrot**"); Expected Output: $result = array("**alpha**","**bravo**","**charlie**","**delta**","**foxfrot**"); Simple