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assembly to compare two numbers

由 自闭症网瘾萝莉.ら 提交于 2019-11-27 03:14:54
问题 What is the assembler syntax to determine which of two numbers is greater? What is the lower level (machine code) for it? Can we go even lower? Once we get to the bit level, what happens? How is it represented in 0's and 1's? 回答1: It varies from assembler to assembler. Most machines offer registers, which have symbolic names like R1, or EAX (the Intel x86), and have instruction names like "CMP" for compare. And for a compare instruction, you need another operand, sometimes a register,

lambda表达式的使用

由 ≡放荡痞女 提交于 2019-11-27 02:58:59
Java8发布已经有一段时间了，这次发布的改动比较大，很多人将这次改动与Java5的升级相提并论。Java8其中一个很重要的新特性就是lambda表达式， 允许我们将行为传到函数中。想想看，在Java8 之前我们想要将行为传入函数，仅有的选择就是匿名内部类。Java8发布以后， lambda表达式将大量替代匿名内部类的使用 ， 简化代码的同时，更突出了原来匿名内部类中最重要的那部分包含真正逻辑的代码。尤其是对于做数据的同学来说，当习惯使用类似scala之类的函数式编程语言以后，体会将更加深刻。 现在我们就来看看Java8中lambda表达式的一些常见写法。 lambda体中调用方法的参数列表和返回值类型，要和函数式接口中抽象方法的参数列表和返回值类型保持一致。 一、替代匿名内部类 lambda表达式用的最多的场合就是替代匿名内部类，实现Runnable接口是匿名内部类的经典例子。lambda表达式的功能相当强大，用()->就可以代替整个匿名内部类！ public class Test1{ public static void main(String[] args) { Runnable runnable = new Runnable() { @Override public void run() { System.out.println("普通，线程启动"); } };

comparing arrays in objective-c

由 给你一囗甜甜゛ 提交于 2019-11-27 02:50:21
问题 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 ? 回答1: These are Cocoa array objects (instances of NSArray), not C arrays or C++ vectors, and remember that Objective

How to compare type of an object in Python?

由 牧云@^-^@ 提交于 2019-11-27 02:31:53
Basically I want to do this: obj = 'str' type ( obj ) == string I tried: type ( obj ) == type ( string ) and it didn't work. Also, what about the other types? For example, I couldn't replicate NoneType . anthony isinstance() In your case, isinstance("this is a string", str) will return True . You may also want to read this: http://www.canonical.org/~kragen/isinstance/ isinstance works: if isinstance(obj, MyClass): do_foo(obj) but , keep in mind: if it looks like a duck, and if it sounds like a duck, it is a duck. EDIT: For the None type, you can simply do: if obj is None: obj = MyClass() First

Compare two files in Visual Studio

由 限于喜欢 提交于 2019-11-27 02:20:21
I saw new comparsion tool in VS 2012 for comparing two files or two versions of file. I like it. But when I tried to find it I can't because I don't use TFS. Is there a way how can I just compare two files with builtin feature in VS but without TFS? You can invoke devenv.exe /diff list1.txt list2.txt from the command prompt or, if a Visual Studio instance is already running, you can type Tools.DiffFiles in the Command window, with a handy file name completion: You can try VSCommands extension from Visual Studio Gallery . Latest release allows you to select two file and compare them: Inspired

PHP compare two arrays and get the matched values not the difference

由 强颜欢笑 提交于 2019-11-27 01:46:48
问题 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**");

Why does Oracle's varchar sort order not match the behavior of varchar comparison?

由 会有一股神秘感。 提交于 2019-11-27 01:46:26
问题 An SQL statement like: select * from ( select '000000000000' as x from dual union select '978123456789' as x from dual union select 'B002AACD0A' as x from dual ) /*where x>'000000000000'*/ order by x; Yields: B002AACD0A 000000000000 978123456789 After uncommenting the WHERE-restriction, the result is: B002AACD0A 978123456789 I would have expected the result to be just 978123456789 since B002AACD0A is returned before 000000000000 when running the query without restriction. How can this

How to compare two maps by their values

由 有些话、适合烂在心里 提交于 2019-11-27 01:12:29
问题 How to compare two maps by their values? I have two maps containing equal values and want to compare them by their values. Here is an example: Map a = new HashMap(); a.put("foo", "bar"+"bar"); a.put("zoo", "bar"+"bar"); Map b = new HashMap(); b.put(new String("foo"), "bar"+"bar"); b.put(new String("zoo"), "bar"+"bar"); System.out.println("equals: " + a.equals(b)); // obviously false How should I change the code to obtain a true? 回答1: Your attempts to construct different strings using

Compare RGB colors in c#

由 跟風遠走 提交于 2019-11-27 01:01:26
I'm trying to find a way to compare two colors to find out how much they are alike. I can't seem to find any resources about the subject so I'm hoping to get some pointers here. Idealy, I would like to get a score that tells how much they are alike. For example, 0 to 100, where 100 would be equal and 0 would be totally different. Thanks! Edit: Getting to know a bit more about colors from the answers I understand my question was a bit vague. I will try to explain what I needed this for. I have pixeldata (location and color) of an application window at 800x600 size so I can find out if a certain

Linq where clause compare only date value without time value

由 元气小坏坏 提交于 2019-11-27 00:46:17
问题 var _My_ResetSet_Array = _DB .tbl_MyTable .Where(x => x.Active == true && x.DateTimeValueColumn <= DateTime.Now) .Select(x => x); Upper query is working correct. But I want to check only date value only. But upper query check date + time value. In traditional mssql, I could write query like below. SELECT * FROM dbo.tbl_MyTable WHERE CAST(CONVERT(CHAR(10), DateTimeValueColumn, 102) AS DATE) <= CAST(CONVERT(CHAR(10),GETDATE(),102) AS DATE) AND Active = 1 So could anyone give me suggestion how
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