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c# - Solve a cross-threading Exception in WinForms

Presently I'm working with WinForms(in C#) and I have to run the application in the background. For this purpose ... How can I solve this error? See Question&Answers more detail:os...

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php - Check for duplicates before inserting

Before inserting into the database, I'm using the following code to check for duplicates. To me, a duplicate is ... comes back with count 0. See Question&Answers more detail:os...

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java - Attach to already running JVM

Is there a way to attach to an already running JVM? For example, in JNI you can use JNI_CreateJavaVM to create ... or an external jvm instance? See Question&Answers more detail:os...

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R: What do you call the :: and ::: operators and how do they differ?

I'm wondering how the functions of the :: and ::: operators differ in R. However, I can't figure out what ... e., what exactly does each do)? See Question&Answers more detail:os...

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javascript - Stop IE from loading dynamically included script twice

I am including some related content on misc. web pages by adding a <script> tag near the end of the <body ... that IE8 loads js_test2.js twice. See Question&Answers more detail:os...

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jquery - Popover hides parent element if used with Prototype JS

After updating to bootstrap 2.3.0 I noticed strange behaviour of popover tooltip. If you enter the field and try ... ://jsfiddle.net/U6EDs/4/ See Question&Answers more detail:os...

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What is the difference between JavaScript object and primitive types?

Stoyan Stefanov in his excellent book 'Object-Oriented JavaScript' says: Any value that doesn't belong to one ... like with normal objects. See Question&Answers more detail:os...

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Is there a way to instantiate a class by its name in delphi?

I'd like to instantiate a class but I only have its name in a string. Is there a way? See Question&Answers more detail:os...

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Why is redirecting stdout/stderr on android not working?

I downloaded SDL 1.3 and tested it together with OpenGL ES on my android 2.2 device. It works fine but I ... What am I missing or doing wrong? See Question&Answers more detail:os...

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SQL Server Passthrough query as basis for a DAO recordset in Access

We've recently created and migrated our Access DB backend to SQL Server. I'm trying to, using VBA code, ... is it not passing through properly. See Question&Answers more detail:os...

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python - returning a default value

I'm looking to mimic the behavior of built-in functions (like getattr) that allow the user to specify a "default ... python 3.2 if that matters) See Question&Answers more detail:os...

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java - Should log4.properties be on the classpath?

I'm having some problems putting my log4j.properties file on classpath. I can use it when I'm ... file.layout.ConversionPattern=${PATTERN} See Question&Answers more detail:os...

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gcc - C code with undefined results, compiler generates invalid code (with -O3)

I know that when you do certain things in a C program, the results are undefined. However, the compiler ... generating a ud2 instruction... See Question&Answers more detail:os...

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excel - How to open a workbook specifying its path

Sub openwb() ChDir "E:sarathPTMetrics20131004D8 L538-L550 16MY" Workbooks("D8 L538-L550_16MY_Powertrain Metrics_20131002. ... its path? See Question&Answers more detail:os...

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c# - How can I alternately buffer and flow a live data stream in Rx

I have two streams. One is a flow of data (could be any type), the other is a boolean stream acting as a gate ... Select(_ => toggle = !toggle); See Question&Answers more detail:os...

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multithreading - Java getting download progress

I am writing a Java application (Using NetBeans as an IDE and a jFrame form), and one part of it ... catch (InterruptedException ex) { } See Question&Answers more detail:os...

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javascript - How to export an HTML table as a .xlsx file

I have a question about exporting an HTML table as an xlsx file. I did some work and now I can export it as an ... )) link.click(); } </script> See Question&Answers more detail:os...

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using variable length argument in scala

I know how to define a method with variable length argument: case class taxonomy(vocabularies:(String,Set[String])*) ... ("Libya","evolution")) See Question&Answers more detail:os...

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Passing a List to another Activity in Android

I've created a list and would like to pass the list to another activity but i'm getting an error on the putExtra ... intent, 0); } } }); See Question&Answers more detail:os...

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date - MongoDB - group by month

I am writing a query in mongo db. I have a booking table and I want to get number of bookings in a month ... I going wrong ? Kindly assist me. See Question&Answers more detail:os...

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python - How can I combine dictionaries with the same keys?

I have a list of dictionaries like so: dicts = [ {'key_a': valuex1, 'key_b': valuex2, 'key_c': valuex3} ... are always going to be identical. See Question&Answers more detail:os...

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hadoop - Create HIVE Table with multi character delimiter

I want to create a HIVE Table with multi string character as a delimiter such as CREATE EXTERNAL TABlE tableex(id ... multi string like "~*". See Question&Answers more detail:os...

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How to find the indices of the top 10,000 elements in a symmetric matrix(12k X 12k) in R

I have a nonzero symmetric matrix 'matr' that is 12000X12000. I need to find the indices of the top 10000 elements in 'matr' ... [2,2]] <- 0 } } See Question&Answers more detail:os...

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python - Forced conversion of non-numeric numpy arrays with NAN replacement

Consider the array x = np.array(['1', '2', 'a']) Tying to convert to a float array raises an ... tests for non-numeric elements like letters? See Question&Answers more detail:os...

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r - Why this behavior when coercing a list to character via as.character()?

In the process of (mostly) answering this question, I stumbled across something that I feel like I really should ... get output of this form? See Question&Answers more detail:os...

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java - Getting Image from Firebase Storage using Glide

I am trying to load an image from Firebase Storage using Glide but I am getting an error . package com.kanishq. ... ' I am getting a error: See Question&Answers more detail:os...

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python - Converting Flask form data to JSON only gets first value

I want to take input from an HTML form and give the output in JSON format. When multiple values are ... JSON without losing list values? See Question&Answers more detail:os...

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What is the right way to use spring MVC with Hibernate in DAO, service layer architecture

I am using Spring MVC with Hibernatedaosupport for my DAO classes. Confused here where to start the ... , service layer architecture? See Question&Answers more detail:os...

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

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