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c# - What is the difference between File.ReadLines() and File.ReadAllLines()?

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

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java - why equals() method when we have == operator?

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

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forms - How to use EL with <ui:repeat var> in id attribute of a JSF component

I have following code: <ui:repeat var="class2" value="#{bean.list}" varStatus="status"> <h:form id="#{class2. ... How is this caused and how can I solve it? Question&Answers:os...

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

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c# 4.0 - Conflicting overloaded methods with optional parameters

I have two overloaded methods, one with an optional parameter. void foo(string a) { } void foo(string a, int b = ... ? Why did the C# team define it that way? Question&Answers:os...

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

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Read Numeric Data from a Text File in C++

For example, if data in an external text file is like this: 45.78 67.90 87 34.89 346 0.98 How can I read this text ... f << " "; system("pause"); return 0; } Question&Answers:os...

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

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html - Drop-down menu that opens up/upward with pure css

I've created a dropdown menu with pure CSS and I've gotten it to a place that I like except I want it to be "drop-up" not " ... #">X</a></li> </ul> </ul> </div> Question&Answers:os...

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

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java - Converting Roman Numerals To Decimal

I have managed to get my code to convert most Roman numerals to its appropriate decimal value. But it doesn't work ... )) { decimal-=100; } return decimal; } Question&Answers:os...

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

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python - How to clamp an integer to some range?

I have the following code: new_index = index + offset if new_index < 0: new_index = 0 if new_index >= len(mylist): ... = max(0, min(new_index, len(mylist)-1)) Question&Answers:os...

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

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android - Use Picasso to get a callback with a Bitmap

I'm using Picasso to download images for my app. I'm in a situation where I need to access the Bitmap first ... Picasso. Can anyone show me how to do it? Question&Answers:os...

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

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javascript - Rails 4 turbo-link prevents jQuery scripts from working

I'm building a Rails 4 app and I have a few scattered js files that I'm trying to include "the rails ... but I'm suspecting this is related to turbo-linking. Question&Answers:os...

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

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c++ - Win32 API to enumerate dll export functions?

I found similar questions but no answer to what I am looking for. So here goes: For a native Win32 dll, ... a Win32 API to enumerate its export function names? Question&Answers:os...

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

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sql - Pivot on Multiple Columns using Tablefunc

Has anyone used tablefunc to pivot on multiple variables as opposed to only using row name? The ... www.postgresonline.com/journal/categories/24-tablefunc. Question&Answers:os...

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

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xml - case-insensitive matching in XPath?

For example, for the XML below <CATALOG> <CD title="Empire Burlesque"/> <CD title="empire burlesque"/> ... Other solutions like PHP function are also accepted. Question&Answers:os...

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

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How to get input field value using PHP

I have a input field as follows: <input type="text" name="subject" id="subject" value="Car Loan"> I would ... session. How do I do this using PHP or jQuery? Question&Answers:os...

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

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powershell - How can I find the Upgrade Code for an installed MSI file?

In certain cases the need to retrieve MSI upgrade codes for deployed packages can arise. Common scenarios: ... tries to summarize other retrieval approaches. Question&Answers:os...

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

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Python __str__ and lists

In Java, if I call List.toString(), it will automatically call the toString() method on each object inside the ... inside the list (or dict for that matter)? Question&Answers:os...

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

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php - POSTing Form Fields with same Name Attribute

If you have a form containing text inputs with duplicate name attributes, and the form is posted, will you still ... all fields from the $_POST array in PHP? Question&Answers:os...

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

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polymorphism - Vector of objects belonging to a trait

Consider the following code: trait Animal { fn make_sound(&self) -> String; } struct Cat; impl Animal ... calls the corresponding trait method on each element? Question&Answers:os...

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

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ggplot2 - Use of ggplot() within another function in R

I'm trying to write a simple plot function, using the ggplot2 library. But the call to ggplot doesn't find ... plot function do more complicated stuff! :) ) Question&Answers:os...

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

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datetime - How to group by week in MySQL?

Oracle's table server offers a built-in function, TRUNC(timestamp,'DY'). This function converts any timestamp to ... year; this stuff is for multiyear work. Question&Answers:os...

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

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.NET Memory Profiling Tools

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

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How can we share data between the different steps of a Job in Spring Batch?

Digging into Spring Batch, I'd like to know as to How can we share data between the different steps of a ... there any other way of doing/achieving the same? Question&Answers:os...

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

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objective c - How to sort NSMutableArray using sortedArrayUsingDescriptors?

I have a question about sorting NSMutableArray. I can use sortedArrayUsingDescriptors: method to sort an ... = [x sortedArrayUsingDescriptors:descriptors]; Question&Answers:os...

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

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formatting - Print leading zeros with C++ output operator?

How can I format my output in C++? In other words, what is the C++ equivalent to the use of printf like this: ... " << sprintf("%05d", zipCode) << std::endl; Question&Answers:os...

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

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java - Getting IP address of client

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

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c# - Checking for null before event dispatching... thread safe?

Something that confuses me, but has never caused any problems... the recommended way to dispatch an event is as ... for null and the invocation of the event? Question&Answers:os...

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

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multithreading - Can a C# thread really cache a value and ignore changes to that value on other threads?

This question is NOT about race-conditions, atomicity, or why you should use locks in your code. I already know about ... ) { // Do something here } } } Question&Answers:os...

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

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java - Android Camera will not work. startPreview fails

I'm getting these errors from LogCat: 10-30 00:31:51.494: D/CameraHal(1205): CameraHal setOverlay/1/00000000/00000000 10 ... .out("Hello init."); //Shaders int vertexShader = 0...

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

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