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4

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How to sync props to state using React hook : setState()

I am trying to set the state using React hook setState() using the props the component receive. I've tried using the below code: import React,{useState , useEffect} from 'react'; const Persons = (props) => { // console.log(props.name); const [nameState , setNameState] = useState(props) console.log(...
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1

answer
2.6k

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JMS multithreading concept with MQ

I recently started learning JMS and so far understood some of the concepts. However I would like to know how IBM MQ or any queue provider handles request from a multithreaded application. for example Consider a application which is mutithreaded and configured to send messages to Mainframe host using...
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2

answer
31

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Python: calculating subtraction of columns in dataframe

I have a dataframe which is like this: id_A id_B f1_A f2_A f3_A f1_B f2_B f3_B t 1 2 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 0 3 4 7 8 9 8 7 6 1 I want to do a subtraction to produce results like this: id_A id_B f...
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19

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2

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30.6k

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JSTL Core fmt:message Tag Dynamic message using bundle/properties file

I understand the usage of standard fmt:message Tag i.e we define something like this in the JSP: Suppose error.Value = "MQ2009" My properties file named "ValidationErrorMessages" has following entry MQ2009 = MQ time out Now my requirement is to have something like MQ2009 = Mq timeout happened for me...
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2

votes
1

answer
650

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How to find systems cached and free memory using C#

I couldnt able to find the cached and free memory of a system using C#.Help me.......
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2

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1

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69

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Functionality of require() in nodeJS [duplicate]

This question already has an answer here: What is the purpose of Node.js module.exports and how do you use it? 11 answers I have a fundamental query of how the require() works in nodeJS application. What does require() actually return ?? For example, say I wanted to use 2 third party packages : lod...
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1

answer
97

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Getting different answer even after using Join() in threads - C#

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using System.Reflection; using System.Runtime.InteropServices; using System.Collections.ObjectModel; using System.Threading; namespace JUSTFORPRACTICE { class Program...
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1

votes
2

answer
339

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SQL - Cannot print values from 'inserted' table

I have heard that the 'inserted' table automatically stores the last inserted record of any table temporarily.I was able to get the values from this inserted table when using triggers but not manually as insert into samantha (id , name) values (11,'has') select *from inserted I am getting the error...
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1

answer
700

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UIDatePicker not responding properly

I have a UIDatePicker placed in a view, the UIDatePicker doesn't respond properly to touches - only the rightmost column/wheel scrolls for all touches in the UIDatePicker. This is independent on where in the view the touches occur, even when attempting to scroll the date column/wheel the rightmost c...
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4

votes
4

answer
111

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Gettin error in SQL Server while finding out max age in a table

We can try to get max age simply by using SELECT TOP 1 age FROM Head1 ORDER BY Age DESC But I've tried using while loop in SQL Server code declare @a int, @m int, @maxo int; set @maxo = 0; while(@[email protected] @maxo = @m; set @[email protected]+1; end print @maxo error Msg 141, Level 15, State 1, Line 5 A SELECT state...
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9

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2

answer
240

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Some Excel Files not moving from Shared Path to SQL Server

We have an application where the data in Excel file (present in shared path) moves to Database. In case of any error, the files moves to error folder by writing the error in a log file.It uses a windows service for the operation. Sometimes the file doesn't have any error still moves to error folder...
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3

answer
209

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Object declaration in VB

I have a small doubt: What is the difference between str and str_obj ; cls and cls_obj. Are all of them are objects..?? (Got this doubt as they are declared in different syntaxes). Can someone please elaborate ? Thanks in advance. Public Class Form1 Public Structure dayplan_str Public a As Intege...
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2

answer
1.6k

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Lazy initialization of Singleton implementation without using Synchronized Key word

I was asked in an interview to suggest a design/implementation of a Singleton Pattern where I have to Lazy load the class and also not use the synchronized key word. I got choked and could not come up with anything.I then I started reading on java concurrency and concurrentHaspMap. Please check the...
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3

answer
133

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How does Type T = Type.GetType(“SomeClass”); give me an object?

When I am going through reflection I came across this: Type T = Type.GetType("Somenamespace.someclass"); Is 'T' an object here? If so, it lacks the complete definition of object as: Type T = new Type(); Then how can T be an object? And how can we assign the value of Type.GetType("Somenamespace.somec...
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2

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0

answer
176

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JIRA Connect 1.2.1 imported as CocoaPod results in linker error for armv7

I'm trying to integrate both HockeyApp and JIRA Mobile Connect using CocoaPods, but linking fails for armv7. The CrashReporter framework seems to be in place but it complains about some PLCrashReporter symbol that can't be found for armv7 architecture. The change I made to the project was to replace...
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2

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1

answer
1.8k

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How to handle TODO comments when sonar error is encountered

We have an application which is big and we have added the TODO rule to the quality gates which gives error if TODO comments are found. If we just removing the TODO comment (which is scary) it works but the whol purpose of adding TODO comment is lost. Is there still a way to keep the TODO comment by...
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5

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2

answer
1.9k

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Facing issues installing m2e maven plugin for Eclipse Juno

I installed JUNO Eclipse and then wanted to get the maven plugin for eclipse. After some searching I got to know that I can install the plugin using eclipse market place. So I searched the plugin and installed it successfully but when I restarted eclipse, I cannot see Maven option when I right click...
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1

votes
2

answer
36

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Going a level up in the src path of the <script src=“”></script> tag in HTML

I have folder structure as below. Where I have index.html file in html_files folder. I am using the script tag as below in my index.html file. but the jQuery function hide() is not working. Am I doing anything wrong here..? Kindly help me out. Thanks in advance.
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2

votes
1

answer
67

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Codename-one sizing/scaling bar chart

I have searched far and wide, but I can't find the answer to a very simple question. I have a vertical stacked bar chart which bars are way to long - you can't see the entire chart on the screen. I just want to scale down the bars so the chart is visible as a whole. How can I do that? I tried sizin...
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7

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4

answer
13.5k

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TreeSet internally uses TreeMap ,so is it required to implement Hashcode method when using Treeset

I would like to know what it means when javadocs for TreeSet says 'This class implements the Set interface, backed by a TreeMap instance'? In below example, I haven't implemented Hashcode method and still it is working as per expectation i.e it is able to sort the objects. Notice that I have purpose...
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1

votes
2

answer
33

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Getting error while executing copy command in command prompt

While executing the below command in Command Prompt, copy C:\Users\ADMIN\Downloads\*.* C:\Users\ADMIN\Downloads\SELF STUDY\DOCS\Completed I am facing the below error Syntax of the command is incorrect Can you please let me know where I am going wrong..??
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2

votes
1

answer
27

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Query on if block helper and custom helper in handlebars

I was unable to execute the below code on the handlebars template. Can you please point out the error in the below code? {{#if (isGreen PARAM1 PARAM2)}} GREEN {{/if}} Where isGreen is custom register helper as shown below : Handlebars.registerHelper('isGreen', function (PARAM1, PARAM2) { //SOME STE...
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5

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1

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4.9k

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JSR 303 bean validation unit testing with Mockito and Autowiring

I want to junit test my validator class but my validator class has @autowired service classes. How do I inject these dependencies using Mocikto? I am going to call the validator using below line of code. Set constraintViolationsFromJavaRules = validator.validate(myDomainPOJOObject, Default.class);...
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1

answer
1.1k

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javax.el.ELException: Expression cannot be null in stacktrace

I am facing an issue wherein the page flow is working as expected but I am seeing stacktrace on the console. [7/10/14 15:26:35:467 IST] 000000e9 lifecycle W Expression cannot be null javax.el.ELException: Expression cannot be null at org.jboss.el.lang.ExpressionBuilder.createNodeInternal(Expre...
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2

votes
1

answer
31

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Python: how to use merge to perform feature concatenation?

I'm having trouble in performing feature concatenation using pandas.merge. I have a dataframe that is like: id_A id_B t 1 2 1 2 3 0 3 4 1 ... And another dataframe which is like: id f1 f2 f3 1 1 2 3 2 4 5 6 3 7 8 9 4 8 7 6 5 5 4 3 ... I would like to use pandas.merge or jo...
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0

answer
296

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WebAPI model binding complex type - JSON object to collection

I have the following method signature on a WebAPI endpoint: [HttpPost] public async Task AddShopping(List shoppingList) { This is example JSON received in the POST body: [ { "name":"Bob", "items":{"food":"apple","quantity":1} }, { "name":"Tim", "items":[{"food":"orange","quantity":3}] }, { "name":"J...
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3

answer
1.1k

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Maven Repository updation and maintenance

I just downloaded a Spring tutorial off the internet and am trying to run it in my local workspace. To do it, I first tried to get all the dependant jars needed by the project. I tried maven build and it failed because dependant jar's were missing from my local repository and those jar's were also m...
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