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exception - Why does division by zero with floating point (or double precision) numbers not throw java.lang.ArithmeticException: / by zero in Java

The following statement throws java.lang.ArithmeticException: / by zero as obvious. System.out.println(0/0); because the ... infinity, not a number (NaN)... Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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SQL Server Pivot Table with multiple column aggregates

I've got a table: create table mytransactions(country varchar(30), totalcount int, numericmonth int, chardate char(20), ... tool that I'm not aware of? Thanks Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - READ_LOGS permission on Jelly Bean (api 16)

Since Android Jelly Bean doesn't support the logs reading permission (according to this google io 2012 video and this ... a system app, or is rooting enough? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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string - What is lexicographical order?

What is the exact meaning of lexicographical order? How it is different from alphabetical order? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - In PHP (>= 5.0), is passing by reference faster?

In PHP, function parameters can be passed by reference by prepending an ampersand to the parameter in the ... PHP internals short from reading the source. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Round minute down to nearest quarter hour

I need to round times down to the nearest quarter hour in PHP. The times are being pulled from a MySQL database ... but not sure how to go about it. Thanks Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Access denied to jQuery script on IE

I have an iframe using the jQuery 1.4.2 script. The same iframe is injected into both http and https sites. The ... success: function(ret){ callback(ret) } }); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - ASP.NET file download from server

After a user clicks a button, I want a file to be downloaded. I've tried the following which seems to work, but ... .csv")); response.Flush(); response.End(); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ cli - c++/cli pass (managed) delegate to unmanaged code

How do I pass a function pointer from managed C++ (C++/CLI) to an unmanaged method? I read ... ::GetFunctionPointerForDelegate method, but I couldn't compile. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Why can't I update props in react.js?

Why do we have both state and props? Why don't we just have one source of data? I'd like to update a ... own or its parent's props. Thanks for any help. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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apache - The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application

I am using JDK 1.7, Apache Tomcat 7.0.23 and I have placed JSTL core library(1.2) and STANDARD jar in ... 722) Can anyone suggest me what mistake I am making? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Global Variable from a different file Python

So I have two different files somewhat like this: file1.py from file2 import * foo = "bar" test = ... extremely helpful if this is possible in some way. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - Find text string in jQuery and make it bold

What I want to do is use jQuery to find a piece of text within a paragraph and add some CSS to make it ... , hence me executing it after the window has loaded. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to run a flask application?

I want to know the correct way to start a flask application. The docs show two different commands: $ flask - ... should be used to run a Flask application? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Deserializing polymorphic types with Jackson based on the presence of a unique property

If I have a class structure like so: public abstract class Parent { private Long id; ... } public class ... "stringB": ... deserialize it as SubClassB". Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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341 views

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com - How to put the WebBrowser control into IE9 into standards?

i am using automation (i.e. COM automation) to display some HTML in Internet Explorer (9): ie = ... document mode per instance for a WebBrowser control? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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html - How make background image on newsletter in outlook?

I'm trying to make newsletter where I have some image as background and text on it. This is easy but I ... m using outlook 2007. Any help would be appreciated. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

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javascript - Create RegExps on the fly using string variables

Say I wanted to make the following re-usable: function replace_foo(target, replacement) { return target.replace ... return target.replace(regex,replacement); } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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558 views

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JavaFX 2.1: Toolkit not initialized

My application is Swing-based. I would like to introduce JavaFX and configure it to render a Scene on a ... environment and also doesn't waste a thread. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to pass arguments in pytest by command line

I have a code and I need to pass the arguments like name from terminal. Here is my code and how to pass the ... (name): print ("Displaying name: %s" % name) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to terminate process from Python using pid?

I'm trying to write some short script in python which would start another python code in subprocess if is not already started ... to "x" ??? What I've missed ? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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266 views

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regex - How can I use a variable in the replacement side of the Perl substitution operator?

I would like to do the following: $find = "start (.*) end"; $replace = "foo 1 bar"; $var = " ... bar'; Somehow I am missing something regarding the escaping. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - What's the difference between "class method" and "static method"?

I've worked with a few different languages such as Java, C#, and Objective-C. In most languages, methods that ... between a static method and a class method? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to elegantly ignore some return values of a MATLAB function

Is it possible to get the 'nth' return value from a function without having to create dummy variables for all n-1 ... ; I still think this is very ugly code. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Converting a number with comma as decimal point to float

I have a list of prices with a comma for a decimal point and a dot as the thousand separator. Some examples: ... each number. Is there are better way? Thanks. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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288 views

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c - Maximum memory which malloc can allocate

I was trying to figure out how much memory I can malloc to maximum extent on my machine (1 Gb RAM 160 Gb ... of time? Why wasn't there any allocation failure? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

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python - How to config nltk data directory from code?

How to config nltk data directory from code? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Why is my $_ENV empty?

I'm running Apache/2.2.11 (Win32) PHP/5.3.0 and I did the following in my .htaccess file: SetEnv FOO bar If ... . Is this a Windows issue? Or what is going on? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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