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how to handle this in spark

I am using spark-sql 2.4.x version , datastax-spark-cassandra-connector for Cassandra-3.x version. Along with kafka. ... do this in spark-sql ? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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iphone - JSONRepresentation of NSObject Data Model

I am trying to parse all the data that I have populated in my data model. I have some nsmutabledictionary within ... and then parse it? Thanks See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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lua - love2D cannot figure out how to make basic collision with two circles does not give error

I am trying to make it so that when my red circle touches my white circle the red circle will move back a step when ... then TX = TX + 5 end end See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What does <<= represent (in C)?

As the title says I am a bit confused by what <<= represents. I know << is a shift operator, but this is the first ... +; } printf("%d ", s); } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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multithreading - Dying thread in java

If thread died when run() finish or when there is an exception, why my log keeps adding numbers. For example ... Thread-93] INFO - thread finish See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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read rows of ints from a file in C

how can I read rows of ints from a txt file in C. input.txt 3 5 2 3 1 2 1 3 4 the first 3 means ... to get the integers. Can I just use fscanf? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Fixed Array?/ StringBuilder?/ String? which is best way to create a string, if 84 strings to be appended

I know in advance that, there would be 84 strings going to be appended by comma separator, to create one ... Array, Strings or String Builder? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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vb.net - Index outside bounds in event handler

I'm having some trouble displaying the shipping price to the lblshipping.text Option Explicit On Option Strict On ... intIndex End Sub End Class See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Smallest positive number in a vector recursively

I'm writing a function that is supposed to recursively find the smallest positive number in a give vector of ... value from the integer vector? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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mysql - joining two tables with multiple conditions in rails

I have two tables named lines and attribute_values. From that I want to select the fields name from the lines ... this query using Ruby code? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Cumulative sum of array items

I have an sorted array having values like below: I need to calculate total as below: Scenario 1 - Array ... other array values Need help! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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debugging - Delphi XE - EOleSysError, but only when running in IDE/debugger

I have seen other questions with this same problem on XE Forums, but still no answer. I run my application ... be appreciated. Thanks, Rick See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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How to Create the Mutable Dictionary Dynamically For this Json Response in IOS

This is my JSON Response 1 for the time entry Spent_on:"2015-12-27" { "A": { "user": { "id": 1, " ... other way to do this.Thanks in advance. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Using functions from inside a plugin

i wrote a little jQuery button plugin - it contains a method for applying the onclick-function - here's the code ... anyone knows what's wrong? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - How can filter by list in django

I am trying to filter a queryset by a list I am getting unicode data into format of 1,4,5,6 by category = ... 10: '1,4' Thanks in advance. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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html - Issue Related to document.getElementByClassName() in JavaScript

I have javascript function: var el = document.getElementsByClassName('dixc'); now I want to find all the element ... can I find child elements? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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scala - Why does the absence of an else block translate to Unit type return for a function?

I noticed there is a type mismatch caused in the line else if(r1 == 0 || divisors.tail.isEmpty || !divisors.tail ... ,List((0,0))).tail } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - comparator for LinkedHashMap

i am making a program to read data from excel files and store them in tables. But since I am new to ... = tableFields; } return tousRows; } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Making a UDP class which doesn't block an ESP8266 / Arduino

I have a need in my Arduino compatible project to listen on an ESP8266 to a specific UDP port and respond ... they run in separate threads? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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How to search for whole words with grep?

If I have the file foo: read_from_buffer read_from_buffer_and_file write_to_buffer some_other_function then using cat foo | grep ... 0-9a-zA-Z_ See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Google Maps Api v2 Android Error

only Android 5.0 work. Error by Android 5.0 lower I have installed all SDK package. Manifest <?xml version ... Google Maps Api v2 Android Error See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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android - How to fetch data from SQLite and store it to List column and convert to .pdf automatically

I am very novice programmer in Android. My query is to fetch data from SQLite and then reflect all data in to ... ; lv.setAdapter(adapter); } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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go - Golang: Kill an os.Process with exec.ExitError

If I have a os.Exec object called "myCmd" and I call myCmd.Process.Kill(), what is the return code ... cmdWatcher(myCmd) myCmd.Process.Kill() See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Calling a method from an argument

I apologize if this is a duplicate question, I want to be able to call a method that is defined in the ... way to achieve the same thing? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - How web scrape data from this line .. there is no div and no class element I can't find.i want to extract data from that line??how

<p> ==$0 "1."the purpose of our lives is to be happy." - " <strong>Dalai Lama</strong> </P> there ... tags and I can't find locating elements See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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windows - How to detect current operating system at runtime in c++?

I want to detect which operating system my .exe is being run on, so that I could perform specific operations ... just for windows and mac. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - TypeError: unsupported operand type(s) for +=: 'NoneType' and 'str'

I am new to Python and I'm sure that I'm doing something wrong - I would like to ask a user for three numbers ... for +=: 'NoneType' and 'str' See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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282 views

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javascript - How to append children to object dynamically

Suppose I have a object like as shown below: var ob = [ {name: "root",id: 1}, {name: "root2",id ... and update that object as shown above. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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