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What is the lifetime of a static variable in a C++ function?

If a variable is declared as static in a function's scope it is only initialized once and retains its value between function ... plonk = "When will I die?"; } Question&Answers:os...

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

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c# - How do you set the Content-Type header for an HttpClient request?

I'm trying to set the Content-Type header of an HttpClient object as required by an API I am calling. I ... set the Content-Type header in a HttpClient request? Question&Answers:os...

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

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c# - Entity Framework Code First - two Foreign Keys from same table

I've just started using EF code first, so I'm a total beginner in this topic. I wanted to create relations ... model, with 2 foreign keys to the same table? Question&Answers:os...

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

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css - jQuery get the rendered height of an element?

How do you get the rendered height of an element? Let's say you have a <div> element with some content inside. ... doing this? I am using jQuery if that helps. Question&Answers:os...

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

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python - TypeError: 'str' does not support the buffer interface

plaintext = input("Please enter the text you want to compress") filename = input("Please enter the desired ... 'str' does not support the buffer interface Question&Answers:os...

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

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How can I import Swift code to Objective-C?

I have written a library in Swift and I wasn't able to import it to my current project, written in ... .swift" - 'SCLAlertView.swift' file not found Question&Answers:os...

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

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How do I restrict a float value to only two places after the decimal point in C?

How can I round a float value (such as 37.777779) to two decimal places (37.78) in C? Question&Answers:os...

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

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sorting - How to sort a character vector where elements contain letters and numbers in R?

I have a character array cf <- c("V440","V457","V116","V327","V446","V108", "V155","V217","V120"," ... order() and got same result. Can someone help me please Question&Answers:os...

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

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gcc - How to load address of function or label into register

I am trying to load the address of 'main' into a register (R10) in the GNU Assembler. I am unable to. Here ... the issue and just gives me the same exact error. Question&Answers:os...

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

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java - Something seems wrong with the layout, JButton showing unexpected behaviour at resize of the window

JRE Version 1.7 Update 3 EXPECTED BEHAVIOUR As I run the program, it works as expected, everything works smoothly. As ... ballDiameter); } } **LATEST EDIT : ** Question&Answers:os...

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

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scripting - How do I write a bash script to restart a process if it dies?

I have a python script that'll be checking a queue and performing an action on each item: # checkqueue.py while True: ... /5 * * * * /path/to/keepalivescript.sh Question&Answers:os...

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

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Best way to find if an item is in a JavaScript array?

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

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c# - How to convert UTF-8 byte[] to string

I have a byte[] array that is loaded from a file that I happen to known contains UTF-8. In some debugging ... if it is not implemented, it should be possible. Question&Answers:os...

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

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types - Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?

I'm curious as to whether or not there is a real difference between the money datatype and something like decimal(19,4 ... , but that's not a valid reason :) Question&Answers:os...

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

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How to find the operating system details using JavaScript?

How can I find the OS name and OS version using JavaScript? Question&Answers:os...

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

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sql order by - SQL multiple column ordering

How can I sort by multiple columns in SQL and in different directions. column1 would be sorted descending, and column2 ascending. Question&Answers:os...

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

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pointers - Deleting Objects in JavaScript

I'm a bit confused with JavaScript's delete operator. Take the following piece of code: var obj = { helloText: " ... way, my testing was done in Safari 4.) Question&Answers:os...

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

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399 views

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sql - Postgresql GROUP_CONCAT equivalent?

I have a table and I'd like to pull one row per id with field values concatenated. In my table, for ... for PostgreSQL, or another way to accomplish this? Question&Answers:os...

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

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495 views

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c# - How to translate between Windows and IANA time zones?

As described in the timezone tag wiki, there are two different styles of time zones. Those provided by Microsoft for ... . How can this be accomplished in .Net? Question&Answers:os...

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

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regex - Extracting numbers from vectors of strings

I have string like this: years<-c("20 years old", "1 years old") I would like to grep only the numeric number from ... c(20, 1) How do I go about doing this? Question&Answers:os...

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

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tsql - Retrieving last record in each group from database - SQL Server 2005/2008

I have done some seaching by can't seem to get the results I am looking for. Basically we have four different ... located on a SQL Server 2005 server. Thanks! Question&Answers:os...

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

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php - Able to see a variable in print_r()'s output, but not sure how to access it in code

I googled, installed Devel, Drupal for Firebug, but I can't find it. I found what I want, I know where it ... using PHP? <?php print $something->other; ?> Question&Answers:os...

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

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How does the "final" keyword in Java work? (I can still modify an object.)

In Java we use final keyword with variables to specify its values are not to be changed. But I see that ... compilation error. How does this final really work? Question&Answers:os...

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

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86 views

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How to split a string into an array in Bash?

In a Bash script, I would like to split a line into pieces and store them in an array. For example, given the line ... ; speed does not matter. How can I do it? Question&Answers:os...

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

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497 views

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mongodb - Query for documents where array size is greater than 1

I have a MongoDB collection with documents in the following format: { "_id" : ObjectId("4e8ae86d08101908e1000001") ... to modify the current data structure)? Question&Answers:os...

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

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84 views

1 answer

javascript - Converting an object to a string

How can I convert a JavaScript object into a string? Example: var o = {a:1, b:2} console.log(o) console.log(' ... : [object Object] // no idea what's inside :( Question&Answers:os...

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

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java - Is it possible to set a custom font for entire of application?

I need to use certain font for my entire application. I have .ttf file for the same. Is it possible to set this as ... set, how do I use it in my layout XMLs? Question&Answers:os...

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

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78 views

1 answer

javascript - How do I iterate over a JSON structure?

This question already has answers here: Question&Answers:os...

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

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