Examples On Programing Languages

Define css class in django Forms

Assume I have a form class SampleClass(forms.Form): name = forms.CharField(max_length=30) age = forms.IntegerField() django_hacker = forms.BooleanField(required=False) Is there a way for me to define css classes on each field such that...

UL has margin on the left

For some reason in my footer there's a space to the left of my ul so it isn't lined up with the content above it (membership text etc) If I were to put text outside this ul (but still within the footer wrapper) there is no such space. Here's what it...

Get type of a generic parameter in Java with reflection

Is it possible to get the type of a generic parameter? An example: public final class Voodoo { public static void chill(List<?> aListWithTypeSpiderMan) { // Here I'd like to get the Class-Object 'SpiderMan' Class typeOfThe...

Why use $_SERVER['PHP_SELF'] instead of ""

In a form on a PHP page, you can use: <form action="<?php echo $_SERVER['PHP_SELF']; ?>" ...> or <form action="#" ...> or <form action="" ...> in the action attribute of the form. Since echo $_SERVER['PHP_SELF'] does...

Remove file extension from a file name string

If I have a string saying "abc.txt", is there a quick way to get a substring that is just "abc"? I can't do an fileName.IndexOf('.') because the file name could be "abc.123.txt" or something and I obviously just want to get rid of the extension (i.e...

ValueError: math domain error

I was just testing an example from Numerical Methods in Engineering with Python. from numpy import zeros, array from math import sin, log from newtonRaphson2 import * def f(x): f = zeros(len(x)) f[0] = sin(x[0]) + x[1]**2 + log(x[2]) - 7.0 ...

Creating the checkbox dynamically using JavaScript?

I am trying to create a checkbox dynamically using following HTML/JavaScript. Any ideas why it doesn't work? <div id="cb"></div> <script type="text/javascript"> var cbh = document.getElementById('cb'); var val = '1'; va...

Add disabled attribute to input element using Javascript

I have an input box and I want it to be disabled and at the same time hide it to avoid problems when porting my form. So far I have the following code to hide my input: $(".shownextrow").click(function() { $(this).closest("tr").next().show().f...

Difference between DOM parentNode and parentElement

Can somebody in explain me in as simple as possible terms, what is the difference between classical DOM parentNode and newly introduced in Firefox 9 parentElement...

How do I initialize a dictionary of empty lists in Python?

My attempt to programmatically create a dictionary of lists is failing to allow me to individually address dictionary keys. Whenever I create the dictionary of lists and try to append to one key, all of them are updated. Here's a very simple test cas...

Set textarea width to 100% in bootstrap modal

Was trying all possible ways, but never succeeded: <div style="float: right"> <button type="button" value="Decline" class="btn btn-danger" data-toggle="modal" data-target="#declineModal">Decline</button> </div>...

How to set root password to null

How can I change the password for root user of MySQL to null -- meaning no password or '' -- from the MySQL command line client?...

Remove part of string in Java

I want to remove a part of string from one character, that is: Source string: manchester united (with nice players) Target string: manchester united ...

finding multiples of a number in Python

I'm trying to write a code that lets me find the first few multiples of a number. This is one of my attempts: def printMultiples(n, m): for m in (n,m): print(n, end = ' ') I figured out that, by putting for m in (n, m):, it would run through t...

Autoresize View When SubViews are Added

I am developing an app using iOS 7 and auto layout. I am adding a simple textfield to a UIView. But the view is not getting resized. I even tried to change the frame manually but it did not work. I believe it is because I am using auto layout. Here i...

Access parent DataContext from DataTemplate

I have a ListBox which binds to a child collection on a ViewModel. The listbox items are styled in a datatemplate based on a property on the parent ViewModel: <Style x:Key="curveSpeedNonConstantParameterCell"> <Style.Triggers> &...

Android: How to rotate a bitmap on a center point

I've been looking for over a day for a solution to this problem but nothing helps, even the answers here. Documentation doesn't explain anything too. I am simply trying to get a rotation in the direction of another object. The problem is that the bi...

Passing multiple values for same variable in stored procedure

I have a variable that passes multiple values to stored procedure. When I see through fidler I see values being passed correctly like arg1=331 arg1=222 arg1=876 arg1=932 In my stored procedure I am reading as procedure main...

How do change the color of the text of an <option> within a <select>?

I am trying to change the color of the first option to grey color, that only the text (select one option) but here it's not working here: _x000D_ _x000D_ .grey_color {_x000D_ color: #ccc;_x000D_ font-size: 14px;_x000D_ }_x000D_ <select id="se...

How are parameters sent in an HTTP POST request?

In an HTTP GET request, parameters are sent as a query string: http://example.com/page?parameter=value&also=another In an HTTP POST request, the parameters are not sent along with the URI. Where are the values? In the request header? In the reques...

Is there a "previous sibling" selector?

The plus sign (+) is for the next sibling. Is there an equivalent for the previous sibling?...

Count the Number of Tables in a SQL Server Database

I have a SQL Server 2012 database called MyDatabase. How can I find how many tables are in the database? I'm assuming the format of the query would be something like the following, but I don't know what to replace database_tables with: USE MyDataba...

How to change the DataTable Column Name?

I have one DataTable which has four columns such as StudentID CourseID SubjectCode Marks ------------ ---------- ------------- -------- 1 100 MT400 8...

jQuery AJAX Call to PHP Script with JSON Return

I've been smashing my head against a brick wall with this one, i've tried loads of the solutions on stackoverflow but can't find one that works! Basically when I POST my AJAX the PHP returns JSON but the AJAX shows Undefined instead of the value: ...

JSON ValueError: Expecting property name: line 1 column 2 (char 1)

I am having trouble using json.loads to convert to a dict object and I can't figure out what I'm doing wrong.The exact error I get running this is ValueError: Expecting property name: line 1 column 2 (char 1) Here is my code: from kafka.client i...

How to delete a file via PHP?

How do I delete a file from my server with PHP if the file is in another directory? Here is my page layout: projects/backend/removeProjectData.php (this file deletes all my entries for the database and should also delete the related file) public_...

'invalid value encountered in double_scalars' warning, possibly numpy

As I run my code I get these warnings, always in groups of four, sporadically. I have tried to locate the source by placing debug messages before and after certain statements to pin-point its origin. Warning: invalid value encountered in double_scal...

Model summary in pytorch

Is there any way, I can print the summary of a model in PyTorch like model.summary() method does in Keras as follows? Model Summary: ____________________________________________________________________________________________________ Layer (type) ...

How to get default gateway in Mac OSX

I need to retrieve the default gateway on a Mac machine. I know that in Linux route -n will give an output from which I can easily retrieve this information. However this is not working in Mac OSX(Snow Leopard). I also tried netstat -nr | grep 'def...

Smooth scrolling with just pure css

How can I make a smooth scrolling with just pure css. I have this code Fiddle HTML <a id="up" href="#down">down</a> <div class="up"></div> <a id="down" href="#up">up</a> <div class="down"></div> ...

Two-dimensional array in Swift

I get so confused about 2D arrays in Swift. Let me describe step by step. And would you please correct me if I am wrong. First of all; declaration of an empty array: class test{ var my2Darr = Int[][]() } Secondly fill the array. (such as my2D...

Running multiple async tasks and waiting for them all to complete

I need to run multiple async tasks in a console application, and wait for them all to complete before further processing. There's many articles out there, but I seem to get more confused the more I read. I've read and understand the basic principles...

What does "The code generator has deoptimised the styling of [some file] as it exceeds the max of "100KB"" mean?

I added a new npm package to my project and require it in one of my modules. Now I get this message from webpack, build modulesNote: The code generator has deoptimised the styling of "D:/path/to/project/node_modules/ramda/dist/ramda.js" as it excee...

Laravel 5.1 API Enable Cors

I've looked for some ways to enable cors on laravel 5.1 specifically, I have found some libs like: https://github.com/neomerx/cors-illuminate https://github.com/barryvdh/laravel-cors but none of them has a implementation tutorial specifically to L...

Mongoose limit/offset and count query

Bit of an odd one on query performance... I need to run a query which does a total count of documents, and can also return a result set that can be limited and offset. So, I have 57 documents in total, and the user wants 10 documents offset by 20. ...

How to set JAVA_HOME in Linux for all users

I am new to Linux system and there seem to be too many Java folders. java -version gives me: java version "1.7.0_55" OpenJDK Runtime Environment (rhel-2.4.7.1.el6_5-x86_64 u55-b13) OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode) When I a...

OpenCV - Saving images to a particular folder of choice

I'm learning OpenCV and Python. I captured some images from my webcam and saved them. But they are being saved by default into the local folder. I want to save them to another folder from direct path. How do I fix it? ...

Convert Rows to columns using 'Pivot' in SQL Server

I have read the stuff on MS pivot tables and I am still having problems getting this correct. I have a temp table that is being created, we will say that column 1 is a Store number, and column 2 is a week number and lastly column 3 is a total of som...

C++ Pass A String

Quick probably obvious question. If I have: void print(string input) { cout << input << endl; } How do I call it like so: print("Yo!"); It complains that I'm passing in char *, instead of std::string. Is there a way to typecast i...

Java - removing first character of a string

In Java, I have a String: Jamaica I would like to remove the first character of the string and then return amaica How would I do this?...

How to parse a string to an int in C++?

What's the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero)....

Regular expression "^[a-zA-Z]" or "[^a-zA-Z]"

Is there a difference between ^[a-zA-Z] and [^a-zA-Z]? When I check in C#, Regex.IsMatch("t", "^[a-zA-Z]") // Returns true (I think it's correct) Regex.IsMatch("t", "[^a-zA-Z]") // Returns false There are a lot of web sites using [^a-zA-Z] fo...

.trim() in JavaScript not working in IE

I tried to apply .trim() to a string in one of my JavaScript programs. It's working fine under Mozilla, but an error displays when I try it in IE8. Does anyone know what is going on here? Is there anyway I can make it work in IE? code: var ID = do...

Warning: X may be used uninitialized in this function

I am writing a custom "vector" struct. I do not understand why I'm getting a Warning: "one" may be used uninitialized here. This is my vector.h file #ifndef VECTOR_H #define VECTOR_H typedef struct Vector{ int a; int b; int c; }Vector;...

MySQL: Grant all privileges on database

I've created database, for example 'mydb'. CREATE DATABASE mydb CHARACTER SET utf8 COLLATE utf8_bin; CREATE USER 'myuser'@'%' IDENTIFIED BY PASSWORD '*HASH'; GRANT ALL ON mydb.* TO 'myuser'@'%'; GRANT ALL ON mydb TO 'myuser'@'%'; GRANT CREATE ON my...

Facebook API: Get fans of / people who like a page

I'd like to get a list of users who like a certain page or a fan of it. The FB API documentation states that you can only get the count of the fans of a certain page using the social graph, but not a list of the fans. A discussion here Retrieve Fa...

Why is my CSS style not being applied?

I've got this html: <p> <span class="fancify">Parting is such sweet sorrow!</span><span> - Bill Rattleandrollspeer</span> </p> ...and this css (added to the bottom of Site.css): .fancify { font-size: 1....

Injecting $scope into an angular service function()

I have a Service: angular.module('cfd') .service('StudentService', [ '$http', function ($http) { // get some data via the $http var path = 'data/people/students.json'; var students = $http.get(path).then(function (resp) { ret...

How to open a web page automatically in full screen mode

How do I open a web page automatically in full screen mode? I am looking for a solution to open an web page automatically in full screen mode, without expecting user to users press F11 or any other browser-specifc key. I've searched a lot, but I j...

How to implement swipe gestures for mobile devices?

I have an application made in AngularJS which has arrow key navigation to switch views. I want to implement this navigation using swipe for touch devices. I tried jGestures library but it doesn't go well with swipe. I have been recommended NOT to us...

Can I convert long to int?

I want to convert long to int. If the value of long > int.MaxValue, I am happy to let it wrap around. What is the best way?...

SQL JOIN - WHERE clause vs. ON clause

After reading it, this is not a duplicate of Explicit vs Implicit SQL Joins. The answer may be related (or even the same) but the question is different. What is the difference and what should go in each? If I understand the theory correctly, the ...

Labeling file upload button

How can I internationalize the button text of the file picker? For example, what this code presents to the user: <input type="file" .../> ...

Python Traceback (most recent call last)

I am getting an error executing this code: nameUser=input("What is your name ? ") print (nameUser) The error message is Traceback (most recent call last): File "C:/Users/DALY/Desktop/premier.py", line 1, in File "", line 1, in ...

Utils to read resource text file to String (Java)

Is there any utility that helps to read a text file in the resource into a String. I suppose this is a popular requirement, but I couldn't find any utility after Googling....

git pull aborted with error filename too long

I'm using Windows as my OS, and working on a project with a friend who's using a Mac. He checked in code to our Github. I was trying to git pull everything he did and it aborted with "filename too long" errors of 3rd party code. What can I do?...

Updating a date in Oracle SQL table

I am trying to update a date in a SQL table. I am using Peoplesoft Oracle. When I run this query: Select ASOFDATE from PASOFDATE; I get 4/16/2012 I tried running this query UPDATE PASOFDATE SET ASOFDATE = '11/21/2012'; but it is not working....

How to run Node.js as a background process and never die?

I connect to the linux server via putty SSH. I tried to run it as a background process like this: $ node server.js & However, after 2.5 hrs the terminal becomes inactive and the process dies. Is there anyway I can keep the process alive even ...

Unity 2d jumping script

Does anyone have a good jumping script for 2d games in unity? The code I have works but still is far from jumping, it looks like it is flying. using UnityEngine; using System.Collections; public class movingplayer : MonoBehaviour { public Vector2 ...

Set Focus on EditText

I have an EditText-Field and set an OnFocusChangeListener for it. When it has lost focus, a method is called, which checks the value of the EditText with one in the database. If the return-value of the method is true, a toast is shown and the focus s...

Decoding UTF-8 strings in Python

I'm writing a web crawler in python, and it involves taking headlines from websites. One of the headlines should've read : And the Hip's coming, too But instead it said: And the Hipâ€™s coming, too What's going wrong here?...

Create an array of integers property in Objective-C

I'm having troubles creating a property of an array of integers in Objective-C. I'm not sure whether this is even possible to do in Obj-C so I'm hoping someone can help me in finding out either how to do it correctly or provide an alternative solutio...

How to handle invalid SSL certificates with Apache HttpClient?

I know, there are many different questions and so many answers about this problem... But I can't understand... I have: ubuntu-9.10-desktop-amd64 + NetBeans6.7.1 installed "as is" from off. rep. I need connecting to some site over the HTTPS. For this...

NoClassDefFoundError for code in an Java library on Android

I am experiencing an error quite often among my users. The app crashes during startup. When the MainActivity is supposed to be loaded the VM apparently cannot find the class. I cannot figure out why. The architecture of the app is that there is a com...

Read lines from a file into a Bash array

I am trying to read a file containing lines into a Bash array. I have tried the following so far: Attempt1 a=( $( cat /path/to/filename ) ) Attempt2 index=0 while read line ; do MYARRAY[$index]="$line" index=$(($index+1)) done < /pat...

jQuery hasClass() - check for more than one class

With: if(element.hasClass("class")) I can check for one class, but is there an easy way to check whether "element" has any of many classes? I am using: if(element.hasClass("class") || element.hasClass("class") ... ) Which isn't too bad, but I ...

How to quickly clear a JavaScript Object?

With a JavaScript Array, I can reset it to an empty state with a single assignment: array.length = 0; This makes the Array "appear" empty and ready to reuse, and as far as I understand is a single "operation" - that is, constant time. Is there a ...

How to get text of an element in Selenium WebDriver, without including child element text?

<div id="a">This is some <div id="b">text</div> </div> Getting "This is some" is non-trivial. For instance, this returns "This is some text": driver.find_element_by_id('a').text How does one, in a general way, get the...

Call An Asynchronous Javascript Function Synchronously

First, this is a very specific case of doing it the wrong way on-purpose to retrofit an asynchronous call into a very synchronous codebase that is many thousands of lines long and time doesn't currently afford the ability to make the changes to "do i...

How to compare two JSON have the same properties without order?

I have tried to compare those two JSON objects: <input type="hidden" id="remoteJSON" name="remoteJSON" value='{"allowExternalMembers": "false", "whoCanJoin": "CAN_REQUEST_TO_JOIN"}' /><br /> <input type="hidden" id="localJSON" name="l...

json: cannot unmarshal object into Go value of type

I can't decode the json code below ... any ideas why it doesn't work ? See also play.golang package main import ( "encoding/json" ) type LocationReadable struct { District string City string State s...

How to include an HTML page into another HTML page without frame/iframe?

I want to include an HTML page inside an HTML page. Is it possible? I don't want to do it in PHP, I know that in PHP, we can use include for this situation, how can I achieve the same purely in HTML without using the iframe and frame concept?...

How do I combine the first character of a cell with another cell in Excel?

I have an Excel sheet with first names in Column A and surnames in Column B. I want to create a third Column C that contains the first character from the first name and adds it to the surname, creating first initial + surname. First Name Last Nam...

Reading an integer from user input

What I am looking for is how to read an integer that was given by the user from the command line (console project). I primarily know C++ and have started down the C# path. I know that Console.ReadLine(); only takes a char/string. So in short I am loo...

Trigger a Travis-CI rebuild without pushing a commit?

Using Travis-CI, is it possible to trigger a rebuild without pushing a new commit to GitHub? Use case: A build fails due to an externality. The source is actually correct. It would build OK and pass if simply re-run. For instance, an apt-get fails ...

Retain precision with double in Java

public class doublePrecision { public static void main(String[] args) { double total = 0; total += 5.6; total += 5.8; System.out.println(total); } } The above code prints: 11.399999999999 How would I get ...

Evaluate a string with a switch in C++

I want to evaluate a string with a switch but when I read the string entered by the user throws me the following error. #include<iostream> using namespace std; int main() { string a; cin>>a; switch (string(a)...

PHP: Count a stdClass object

I have a stdClass object created from json_decode that won't return the right number when I run the count($obj) function. The object has 30 properties, but the return on the count() function is say 1. Any ideas? Below is an example of one of the o...

Why is init() always called after new()?

I'm just trying to streamline one of my classes and have introduced some functionality in the same style as the flyweight design pattern. However, I'm a bit confused as to why __init__ is always called after __new__. I wasn't expecting this. Can any...

understanding private setters

I don't understand the need of having private setters which started with C# 2. Having a setter method for me is letting the user to set some variables in that class. In doing so, we will not expose the variables directly to the users. Instead we le...

C++ JSON Serialization

I want a way to serialize and deserialize Objects to JSON, as automatic as possible. Serialize: For me, the ideal way is that if I call in an instance JSONSerialize() it returns an string with a JSON object that has all the public properties of the ...

How to calculate the 95% confidence interval for the slope in a linear regression model in R

Here is an exercise from Introductory Statistics with R: With the rmr data set, plot metabolic rate versus body weight. Fit a linear regression model to the relation. According to the fitted model, what is the predicted metabolic rate for a body wei...

How to convert MySQL time to UNIX timestamp using PHP?

There are a lot of questions that ask about 'UNIX timestamp to MySQL time'. I needed the reversed way, yea... Any idea?...

XPath: How to select elements based on their value?

I am new to using XPath and this may be a basic question. Kindly bear with me and help me in resolving the issue. I have an XML file like this: <RootNode> <FirstChild> <Element attribute1="abc" attribute2="xyz">Data</Eleme...

How to read a file into vector in C++?

I need to read from a .data or .txt file containing a new float number on each line into a vector. I have searched far and wide and applied numerous different methods but every time I get the same result, of a Main.size() of 0 and an error saying "...

How to put scroll bar only for modal-body?

I have the following element: <div class="modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> <div class="modal-dialog" style="overflow-y: scroll; max-height:85%; margin-top: 50px; margin-bottom:50px;...

How To Convert A Number To an ASCII Character?

I want to create an application where user would input a number and the program will throw back a character to the user. Edit: How about vice versa, changing a ascii character into number?...

Using Alert in Response.Write Function in ASP.NET

I have database code like this try { string strConnectionString = ConfigurationManager.ConnectionStrings["SqlServerCstr"].ConnectionString; SqlConnection myConnection = new SqlConnection(strConnectionString); myConnection.Open(); ...

In Visual Studio Code How do I merge between two local branches?

In Visual Studio Code it seems that I am only allowed to push, pull and sync. There is documented support for merge conflicts but I can't figure out how to actually merge between two branches. The Git command line within VSC (press F1) only facillita...

Code coverage with Mocha

I am using Mocha for testing my NodeJS application. I am not able to figure out how to use its code coverage feature. I tried googling it but did not find any proper tutorial. Please help....

Convert an array to string

How do I make this output to a string? List<string> Client = new List<string>(); foreach (string listitem in lbClients.SelectedItems) { Client.Add(listitem); } ...

Best way to check if an PowerShell Object exist?

I am looking for the best way to check if a Com Object exists. Here is the code that I have; I'd like to improve the last line: $ie = New-Object -ComObject InternetExplorer.Application $ie.Navigate("http://www.stackoverflow.com") $ie.Visible = $tru...

Defining TypeScript callback type

I've got the following class in TypeScript: class CallbackTest { public myCallback; public doWork(): void { //doing some work... this.myCallback(); //calling callback } } I am using the class like this: var test =...

Convert date to YYYYMM format

I want to select value = 201301 select getdate(), cast(datepart(year, getdate()) as varchar(4))+cast(datepart(MONTH, getdate()) as varchar(2)) it returns 20131 what is the normal way to do this?...

how to add picasso library in android studio

I am getting this error, please help me. Error:A problem occurred configuring project ':app'. > Cannot evaluate module picasso-master : Configuration with name 'default' not found. Done so far : 1. download the picaso 2.unzip the zip f...

Proxy with express.js

To avoid same-domain AJAX issues, I want my node.js web server to forward all requests from URL /api/BLABLA to another server, for example other_domain.com:3000/BLABLA, and return to user the same thing that this remote server returned, transparently...

Eclipse Optimize Imports to Include Static Imports

Is there anyway to get Eclipse to automatically look for static imports? For example, now that I've finally upgraded to Junit 4, I'd like to be able to write: assertEquals(expectedValue, actualValue); hit Ctrl + Shift + O and have Eclipse add: im...

How to determine whether a given Linux is 32 bit or 64 bit?

When I type uname -a, it gives the following output. Linux mars 2.6.9-67.0.15.ELsmp #1 SMP Tue Apr 22 13:50:33 EDT 2008 i686 i686 i386 GNU/Linux How can I know from this that the given OS is 32 or 64 bit? This is useful when writing configure scr...

How to remove symbols from a string with Python?

I'm a beginner with both Python and RegEx, and I would like to know how to make a string that takes symbols and replaces them with spaces. Any help is great. For example: how much for the maple syrup? $20.99? That's ricidulous!!! into: how much ...

How to make an autocomplete TextBox in ASP.NET?

How do I make an autocomplete TextBox in C# that binds to a data source?...

Grep regex NOT containing string

I am passing a list of regex patterns to grep to check against a syslog file. They are usually matching an IP address and log entry; grep "1\.2\.3\.4.*Has exploded" syslog.log It's just a list of patterns like the "1\.2\.3\.4.*Has exp...

Mobile overflow:scroll and overflow-scrolling: touch // prevent viewport "bounce"

On a mobile (Safari, webviews, wherever), overflow:scroll and overflow-scrolling: touch give a pretty smooth scroll, which is cool. But, it makes the page "bounce" (area circled below), which is not the case when you are not using it, but ...

Passing multiple parameters to pool.map() function in Python

I need some way to use a function within pool.map() that accepts more than one parameter. As per my understanding, the target function of pool.map() can only have one iterable as a parameter but is there a way that I can pass other parameters in as w...

telnet to port 8089 correct command

I am using telnet to port 8089 on remote server. Can any tell me which of the following commands are true. telnet 74.255.12.25 8089 or telnet 74.255.12.25 89 Thanks in Advance....

JQuery .each() backwards

I'm using JQuery to select some elements on a page and then move them around in the DOM. The problem I'm having is I need to select all the elements in the reverse order that JQuery naturally wants to select them. For example: <ul> <li&g...

Commands out of sync; you can't run this command now

I am trying to execute my PHP code, which calls two MySQL queries via mysqli, and get the error "Commands out of sync; you can't run this command now". Here is the code I am using <?php $con = mysqli_connect("localhost", "user", "password", "db"...

How do I convert hex to decimal in Python?

I have some Perl code where the hex() function converts hex data to decimal. How can I do it on Python?...

jQuery get specific option tag text

All right, say I have this: <select id='list'> <option value='1'>Option A</option> <option value='2'>Option B</option> <option value='3'>Option C</option> </select> What would the selecto...

Can't specify the 'async' modifier on the 'Main' method of a console app

I am new to asynchronous programming with the async modifier. I am trying to figure out how to make sure that my Main method of a console application actually runs asynchronously. class Program { static void Main(string[] args) { Boo...

How can I flush GPU memory using CUDA (physical reset is unavailable)

My CUDA program crashed during execution, before memory was flushed. As a result, device memory remained occupied. I'm running on a GTX 580, for which nvidia-smi --gpu-reset is not supported. Placing cudaDeviceReset() in the beginning of the progra...

Javascript add method to object

Suppose I have a Foo object How can I extend this object by adding a bar() method and also ensure that future instances of Foo have this method?...

How to create .ipa file using Xcode?

Please tell me the complete procedure to build my app & use it on a real iPhone....

Extracting text from a PDF file using PDFMiner in python?

I am looking for documentation or examples on how to extract text from a PDF file using PDFMiner with Python. It looks like PDFMiner updated their API and all the relevant examples I have found contain outdated code(classes and methods have changed)...

How to deal with ModalDialog using selenium webdriver?

I am unable to switch to Modal Dialog of given example http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/showModalDialog2.htm I don't know how to get element on modal Dialog ...

How to update column with null value

I am using mysql and need to update a column with a null value. I have tried this many different ways and the best I have gotten is an empty string. Is there a special syntax to do this?...

FirstOrDefault returns NullReferenceException if no match is found

Here is my code: string displayName = Dictionary.FirstOrDefault(x => x.Value.ID == long.Parse(options.ID)).Value.DisplayName; The code works fine if x.Value.ID matches options.ID. However, I get a NullReferenceException if it doesn't....

How to grant "grant create session" privilege?

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Like this With only this code <span>1</span> ...

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After upgrading to JDK 1.7 I am getting below exception: java.lang.VerifyError: Expecting a stackmap frame at branch target 71 in method com.abc.domain.myPackage.MyClass$JaxbAccessorM_getDescription_setDescription_java_lang_String.get(Ljava/lang/Obj...

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I have a ASP application. On click of a particular link, some VB scripts are executed and an ASP page is to be shown, but instead I get a screen that says: Information Not Available. The requested URL was rejected. Please consult with your admi...

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Is there any shortcut to rename a component with the Angular CLI other than manually editing all the component files such as folder name, .css, .ts, spec.ts and app.module.ts? ...

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I wonder how to check the version of ionic. If I do ionic -v I get back 1.4.3 Can that be? Wasn't 1.0.0 just released?...

Controller 'ngModel', required by directive '...', can't be found

What's going on here? Here is my directive: app.directive('submitRequired', function (objSvc) { return { require: 'ngModel', link: function (scope, elm, attrs, ctrl) { // do something } }; }); Here is an...

How do you obtain a Drawable object from a resource id in android package?

I need to get a Drawable object to display on an image button. Is there a way to use the code below (or something like it) to get an object from the android.R.drawable.* package? for example if drawableId was android.R.drawable.ic_delete mContext.g...

MySQL > Table doesn't exist. But it does (or it should)

I changed the datadir of a MySQL installation and all the bases moved correctly except for one. I can connect and USE the database. SHOW TABLES also returns me all the tables correctly, and the files of each table exists on the MySQL data directory....

Determine the number of NA values in a column

I want to count the number of NA values in a data frame column. Say my data frame is called df, and the name of the column I am considering is col. The way I have come up with is following: sapply(df$col, function(x) sum(length(which(is.na(x))))) ...

How do I exit the results of 'git diff' in Git Bash on windows?

I'm using Git Bash on Windows 7. When I run git diff, I see this: However, I'm unable to get back to a regular prompt. Pressing Ctrl+C seems to work, but as soon as I start typing a command, it's covered up with (END) as in that image....

How to change the port number for Asp.Net core app?

I added the following section in project.json. "commands": { "run": "run server.urls=http://localhost:8082", "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.Kestrel --server.urls http://localhost:8082", "weblistener":...

Possible reason for NGINX 499 error codes

I'm getting a lot of 499 NGINX error codes. I see that this is a client side issue. It is not a problem with NGINX or my uWSGI stack. I note the correlation in uWSGI logs when a get a 499. address space usage: 383692800 bytes/365MB} {rss usage: ...

How to query first 10 rows and next time query other 10 rows from table

I have more than 500 rows with in my Database Table with particular date. To query the rows with particular date. select * from msgtable where cdate='18/07/2012' This returns 500 rows. How to query these 500 rows by 10 rows step by step. Query...

How to remove the underline for anchors(links)?

Is there anyway (in CSS) to avoid the underline for the text and links introduced in the page .. ?...

how to show calendar on text box click in html

In html i want to show calendar to select date while clicking a text box. then we select a date from that calendar then the selected date will be display in that text box....

HTML colspan in CSS

I'm trying to construct a layout similar to the following: +---+---+---+ | | | | +---+---+---+ | | +-----------+ where the bottom is filling the space of the upper row. If this were an actual table, I could easily accomplish this ...

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I'm trying to accomplish a layout similar to this one: http://dribbble.com/shots/829195-Slate/attachments/86422 My project uses Twitter Bootstrap with responsive design. It is possible to implement a full width layout with Bootstrap? The issue is ...

'Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of exactly '120x120' pixels, in .png format'

I submitted an app update, but I have received an email telling me this error has occurred: Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of exactly '120x120' pixels, in .png format How can I fi...

MySQL Update Inner Join tables query

I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query: UPDATE b SET b.mapx = g.latitude, b.mapy = g.longitude FROM business AS b INNER JOIN business_geocode g ON b.busin...

Cannot uninstall angular-cli

I've tried several times to uninstall my angular-cli in order to update it but even if I follow the instructions provided on github: npm uninstall -g @angular/cli npm cache clean npm install -g @angular/cli@latest When I check using the command n...

Java2D: Increase the line width

I want to increase the Line2D width. I could not find any method to do that. Do I need to actually make a small rectangle for this purpose?...

Is there a way to detach matplotlib plots so that the computation can continue?

After these instructions in the Python interpreter one gets a window with a plot: from matplotlib.pyplot import * plot([1,2,3]) show() # other code Unfortunately, I don't know how to continue to interactively explore the figure created by show() w...

JavaScript dictionary with names

I want to create a dictionary in JavaScript like the following: myMappings = [ { "Name": 10%}, { "Phone": 10%}, { "Address": 50%}, { "Zip": 10%}, { "Comments": 20%} ] I want to po...

Send email from localhost running XAMMP in PHP using GMAIL mail server

I try to send an email from localhost to my yahoo email account using php mail() function, the return says I successfully send the email but I did not get any email. I've been reading and trying many so called 'simple way' to send email but the resul...

Generating a list of pages (not posts) without the index file

I am using Jekyll as a static generator for a website (not a blog), and I want to have an automatically generated list of all pages on my index page. I get that to work with the following code for the sidebar.html file: <ul> {% for page in s...

Remove blank lines with grep

I tried grep -v '^$' in Linux and that didn't work. This file came from a Windows file system....

python-pandas and databases like mysql

The documentation for Pandas has numerous examples of best practices for working with data stored in various formats. However, I am unable to find any good examples for working with databases like MySQL for example. Can anyone point me to links or ...

Select option padding not working in chrome

Select option padding not working in chrome <style> select option { padding:5px 0px; } </style> <select> <option>1</option> <option>2</option> <option>3</option> </select> ...

Disable browser's back button

How to disable browser's BACK Button (across browsers)?...

How to find difference between two Joda-Time DateTimes in minutes

Below is the method I wrote: public List<Map<String, Object>> loadNotYetInEmployee(int shift, Date date, int transitionVal, String type, User user) { DateTime datetime = new DateTime(date); datetime = datetime ...

How can I set / change DNS using the command-prompt at windows 8

How can I set my DNS settings using the command-prompt or bat file at windows 8 I tried this: netsh interface ip set dns name="Local Area Connection" source=static addr=none but not worked....

Multiple file-extensions searchPattern for System.IO.Directory.GetFiles

What is the syntax for setting multiple file-extensions as searchPattern on Directory.GetFiles()? For example filtering out files with .aspx and .ascx extensions. // TODO: Set the string 'searchPattern' to only get files with // the extension '.aspx...

Best XML parser for Java

I need to read smallish (few MB at the most, UTF-8 encoded) XML files, rummage around looking at various elements and attributes, perhaps modify a few and write the XML back out again to disk (preferably with nice, indented formatting). What would b...

window.print() not working in IE

I am doing something like this in javascript to print a section of my page on click of a link function printDiv() { var divToPrint = document.getElementById('printArea'); var newWin = window.open(); newWin.document.write(divToPrint.innerHTML); n...

Proper way to concatenate variable strings

I need to create new variable from contents of other variables. Currently I'm using something like this: - command: echo "{{ var1 }}-{{ var2 }}-{{ var3 }}" register: newvar The problem is: Usage of {{ var1 }}...{{ varN }} brings too long strin...

How to debug Apache mod_rewrite

I have two main problems with mod_rewrite: 1) There is no meaningful error reported when I have an invalid rule 2) To reliably test each modification, I have to erase chrome's cache. This isn't rocket science, but I have to hit Ctrl+Shift+Delete ...

Switching to landscape mode in Android Emulator

This is probably a pretty easy to answer question, but I can't find the solution myself after a couple hours of searching the documentation and Google. I set the orientation of my Android app to landscape in the AndroidManifest.xml file: android:scr...

UITableView - change section header color

How can I change color of a section header in UITableView? EDIT: The answer provided by DJ-S should be considered for iOS 6 and above. The accepted answer is out of date....

Calculating Waiting Time and Turnaround Time in (non-preemptive) FCFS queue

I have 6 processes as follows: -- P0 -- arrival time = 0 burst time = 10 -- P1 -- arrival time = 110 burst time = 210 -- P2 -- arrival time = 130 burst time = 70 -- P3 -- arrival time = 130 burst time = 70 -- P4 -- ar...

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I have got FFmpeg compiled (libffmpeg.so) on Android. Now I have to build either an application like RockPlayer or use existing Android multimedia framework to invoke FFmpeg. Do you have steps / procedures / code / example on integrating FFmpeg on ...

How to prevent buttons from submitting forms

In the following page, with Firefox the remove button submits the form, but the add button does not. How do I prevent the remove button from submitting the form? _x000D_ _x000D_ function addItem() { var v = $('form :hidden:last').attr('name'); va...

How to get current value of RxJS Subject or Observable?

I have an Angular 2 service: import {Storage} from './storage'; import {Injectable} from 'angular2/core'; import {Subject} from 'rxjs/Subject'; @Injectable() export class SessionStorage extends Storage { private _isLoggedInSource = new Subject...

Number of days between past date and current date in Google spreadsheet

I want to calculate the number of days passed between past date and a current date. My past date is in the format dd/mm/yyyy format. I have used below mentioned formulas but giving the proper output. =DAYS360(A2,TODAY()) =MINUS(D2,TODAY()) In the ...

MSBUILD : error MSB1008: Only one project can be specified

Why am I getting the following Build error? C:\WINDOWS\Microsoft.NET\Framework\v3.5\msbuild.exe C:\Code\EduBenesysNET\EduBenesysNET\EduBenesysNET.vbproj /t:publish /p:Configuration=Release /p:Platform=AnyCPU /v:detailed /p:PublishDir="\\BSIIS3\c$\DA...

IIS 7, HttpHandler and HTTP Error 500.21

On IIS 7, I'm trying to use custom HttpHandler for my ASP.NET web application. I use pipeline mode "classic", .NET version is 4.0.30319, my web.config configuration for the handler is: <system.webServer> <handlers> <add name="MyH...

How to specify jackson to only use fields - preferably globally

Default jackon behaviour seems to use both properties (getters and setters) and fields to serialize and deserialize to json. I would like to use the fields as the canonical source of serialization config and thus don't want jackson to look at proper...

Error: The type exists in both directories

In a MVC2 project I moved a file from App_code to Content folder and compiled it. Then move it back again to App_Code and then changed its Build Action to "Compile". Now I get this error and I don't know how to fix this to make my program work again:...

Referring to a Column Alias in a WHERE Clause

SELECT logcount, logUserID, maxlogtm , DATEDIFF(day, maxlogtm, GETDATE()) AS daysdiff FROM statslogsummary WHERE daysdiff > 120 I get "invalid column name daysdiff". Maxlogtm is a datetime field. It's the little stuff that drives me ...

Convert line endings

I have been using d2u to convert line endings. After installing Puppy Linux I noticed that it does not come with d2u, but dos2unix. Then I noticed that Ubuntu is missing both by default. What is another way to convert line endings?...

What is the equivalent of "!=" in Excel VBA?

The problem is that != does not work as a function in excel vba. I want to be able to use If strTest != "" Then instead of If strTest = "" Then Is there another approach to do this besides !=? My function to mimic != is Sub test() Dim intTest...

Changing SQL Server collation to case insensitive from case sensitive?

I've recently installed SQL Server 2008 and I selected collation as case sensitive. I want to make it case insensitive for the entire instance (not for a database in that instance). If I change the collation does it affect any existing databases? if ...

How to encrypt and decrypt String with my passphrase in Java (Pc not mobile platform)?

I want to encrypt a string and then put it on a file. Also want to decrypt it when I want. I don’t need very strong security. I just want to make it harder to get my data others. I tried several ways. Here are these. Md5 Encryption: How to hash...

NSDate get year/month/day

How can I get the year/month/day of a NSDate object, given no other information? I realize that I could probably do this with something similar to this: NSCalendar *cal = [[NSCalendar alloc] init]; NSDateComponents *components = [cal components:0 fr...

Remove multiple objects with rm()

My memory is getting clogged by a bunch of intermediate files (call them temp1, temp2, etc.). and I would like to know if it is possible to remove them from memory without doing repeated rm calls (i.e. rm(temp1), rm(temp2))? I tried rm(list(temp1, te...

Converting HTML files to PDF

I need to automatically generate a PDF file from an exisiting (X)HTML-document. The input files (reports) use a rather simple, table-based layout, so support for really fancy JavaScript/CSS stuff is probably not needed. As I am used to working in Ja...

commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated

Sometimes, when using <h:commandLink>, <h:commandButton> or <f:ajax>, the action, actionListener or listener method associated with the tag are simply not being invoked. Or, the bean properties are not updated with submitted UIInput...

Closing a file after File.Create

I check to see if a file exists with if(!File.Exists(myPath)) { File.Create(myPath); } However, when I go to create a StreamReader with this newly created file, I get an error saying that The process cannot access the file '[my file path ...

GetType used in PowerShell, difference between variables

What is the difference between variables $a and $b? $a = (Get-Date).DayOfWeek $b = Get-Date | Select-Object DayOfWeek I tried to check $a.GetType $b.GetType MemberType : Method OverloadDefinitions : {type GetType()} TypeNameOfValue ...

How to extract this specific substring in SQL Server?

I have a string with a specific pattern: 23;chair,red [$3] i.e., a number followed by a semicolon, then a name followed by a left square bracket. Assuming the semicolon ; always exists and the left square bracket [ always exists in the string, ho...

Scala list concatenation, ::: vs ++

Is there any difference between ::: and ++ for concatenating lists in Scala? scala> List(1,2,3) ++ List(4,5) res0: List[Int] = List(1, 2, 3, 4, 5) scala> List(1,2,3) ::: List(4,5) res1: List[Int] = List(1, 2, 3, 4, 5) scala> res0 == res1 ...

Eloquent ORM laravel 5 Get Array of ids

I'm using Eloquent ORM laravel 5.1, i want to return an array of ids greater than 0, My model called test. I have tried : $test=test::select('id')->where('id' ,'>' ,0)->get()->toarray(); It return : Array ( [0] => Array ( [id] =&g...

how to kill the tty in unix

This is the result of the finger command (Today(Monday) when I (Vidya) logged in) sekic1083 [6:14am] [/home/vidya] -> finger Name Tty Idle Login Time Where Felix pts/0 - Thu 10:06 sekic2594.rnd.ki.sw. john ...

How do I render a Word document (.doc, .docx) in the browser using JavaScript?

I have successfully done code to display a PDF file in the browser instead of the "Open/Save" dialog. Now, I'm stuck trying to display a Word document in the browser. I want to display a Word document in Firefox, IE7+, Chrome etc. Can any one help? ...

Android webview & localStorage

I have a problem with a webview which may access to the localStorage by an HTML5 app. The test.html file informs me that local storage is'nt supported by my browser (ie. the webview). If you have any suggestion.. package com.test.HelloWebView; im...

Printing Mongo query output to a file while in the mongo shell

2 days old with Mongo and I have a SQL background so bear with me. As with mysql, it is very convenient to be in the MySQL command line and output the results of a query to a file on the machine. I am trying to understand how I can do the same with M...

Iterate two Lists or Arrays with one ForEach statement in C#

This just for general knowledge: If I have two, let's say, List, and I want to iterate both with the same foreach loop, can we do that? Edit Just to clarify, I wanted to do this: List<String> listA = new List<string> { "string", "stri...

How to transform currentTimeMillis to a readable date format?

I want to use currentTimeMillis twice so I can calculate a duration but I also want to display Time and Date in user readable format. I'm having trouble as currentTimeMillis is good for the calculation but I can't see a built in function to convert t...

How to convert image to byte array

Can anybody suggest how I can convert an image to a byte array and vice versa? I'm developing a WPF application and using a stream reader....

utf-8 special characters not displaying

I moved my website from my local test server to NameCheap shared hosting and now I'm running into a problem - some of the pages aren't displaying utf-8 special characters properly (showing question marks instead). All pages are utf-8 encoded, as are ...

How to display pandas DataFrame of floats using a format string for columns?

I would like to display a pandas dataframe with a given format using print() and the IPython display(). For example: df = pd.DataFrame([123.4567, 234.5678, 345.6789, 456.7890], index=['foo','bar','baz','quux'], co...

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I'm writing a VBA code which supposed to delete the data on a selected excel sheet, open a dialog box for text file selection, and then import the data from that text file to the same exact sheet I've deleted the data from. So far I can only open the...

Spring Boot Configure and Use Two DataSources

How can I configure and use two data sources? For example here is what I have for the first data source: application.properties #first db spring.datasource.url = [url] spring.datasource.username = [username] spring.datasource.password = [password]...

tar: add all files and directories in current directory INCLUDING .svn and so on

I try to tar.gz a directory and use tar -czf workspace.tar.gz * The resulting tar includes .svn directories in subdirs but NOT in the current directory (as * gets expanded to only 'visible' files before it is passed to tar I tried to tar -czf w...

Can attributes be added dynamically in C#?

Is it possible to add attributes at runtime or to change the value of an attribute at runtime?...

Android Color Picker

I am looking for a Color Picker framework which can return color HEX on selection. I have looked at this wondering if there is some other library I can use....

Downloading Java JDK on Linux via wget is shown license page instead

When I try to download Java from Oracle I instead end up downloading a page telling me that I need agree to the OTN license terms. Sorry! In order to download products from Oracle Technology Network you must agree to the OTN license terms. ...

Append a tuple to a list - what's the difference between two ways?

I wrote my first "Hello World" 4 months ago. Since then, I have been following a Coursera Python course provided by Rice University. I recently worked on a mini-project involving tuples and lists. There is something strange about adding a tuple into ...

Get text from DataGridView selected cells

I have a DataGridView with cells from a database file that contains data. Basically, I want to get the text from the selected cells in the DataGridView and display it in a textbox at the click of the button. The code for the button click event is: P...

$(this).val() not working to get text from span using jquery

Giving this html, i want to grab "August" from it when i click on it: <span class="ui-datepicker-month">August</span> i tried $(".ui-datepicker-month").live("click", function () { var monthname = $(this).val(); alert(monthna...

Windows batch file file download from a URL

I am trying to download a file from a website (ex. http://www.example.com/package.zip) using a Windows batch file. I am getting an error code when I write the function below: xcopy /E /Y "http://www.example.com/package.zip" The batch file doesn't...

How to iterate std::set?

I have this code: std::set<unsigned long>::iterator it; for (it = SERVER_IPS.begin(); it != SERVER_IPS.end(); ++it) { u_long f = it; // error here } There is no ->first value. How I can obtain the value?...

How to get datetime in JavaScript?

How to get date time in JavaScript with format 31/12/2010 03:55 AM?...

Create, read, and erase cookies with jQuery

Somebody help me. How to create, read and erase some cookies with jQuery ? ...

ReactJS and images in public folder

Im new in ReactJS and I want to import images in a component. These images are inside of the public folder and I do not know how to access the folder from the react component. Any ideas ? EDIT I want to import an image inside Bottom.js or Header....

Is it possible to output a SELECT statement from a PL/SQL block?

How can I get a PL/SQL block to output the results of a SELECT statement the same way as if I had done a plain SELECT? For example how to do a SELECT like: SELECT foo, bar FROM foobar; Hint : BEGIN SELECT foo, bar FROM foobar; END; doesn't wor...

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I am trying to get a specific line from a text file. So far, online I have only seen stuff like sed, (I can only use the sh -not bash or sed or anything like that). I need to do this only using a basic shell script. cat file | while read line d...

Shell equality operators (=, ==, -eq)

Can someone please explain the difference between =, == and -eq in shell scripting? Is there any difference between the following? [ $a = $b ] [ $a == $b ] [ $a -eq $b ] Is it simply that = and == are only used when the variables contain numbers?...

jQuery datepicker, onSelect won't work

I can't get onSelect working on my jQuery datepicker. Heres my code: <script type="text/javascript"> $(function() { $('.date-pick').datePicker( { onSelect: function(date) { alert(date) }, selectWeek: tr...

Convert Date format into DD/MMM/YYYY format in SQL Server

I have a query in SQL, I have to get a date in a format of dd/mm/yy Example: 25/jun/2013. How can I convert it for SQL server?...

Undefined reference to main - collect2: ld returned 1 exit status

I'm trying to compile a program (called es3), but, when I write from terminal: gcc es3.c -o es3 it appears this message: /usr/lib/gcc/i686-linux-gnu/4.4.5/../../../../lib/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' co...

setting multiple column using one update

How to set multiple columns of a table using update query in mysql?...

How to disable button in React.js

I have this component: import React from 'react'; export default class AddItem extends React.Component { add() { this.props.onButtonClick(this.input.value); this.input.value = ''; } render() { return ( <div className="add-...

Postgres: INSERT if does not exist already

I'm using Python to write to a postgres database: sql_string = "INSERT INTO hundred (name,name_slug,status) VALUES (" sql_string += hundred + ", '" + hundred_slug + "', " + status + ");" cursor.execute(sql_string) But because some of my rows are i...

jquery: get id from class selector

Is there any way that I can get the id of an element from something like: <a href="#" class="test" id="test_1">Some text</a> <a href="#" class="test" id="test_2">Some text</a> <a href="#" class="test" id="test_3">Some t...

How to increment a pointer address and pointer's value?

Let us assume, int *p; int a = 100; p = &a; What will the following code will do actually and how? p++; ++p; ++*p; ++(*p); ++*(p); *p++; (*p)++; *(p)++; *++p; *(++p); I know, this is kind of messy in terms of coding, but I want to know ...

Converting a date in MySQL from string field

I'm using a system where the dates are stored as strings in the format dd/mm/yyyy. Is it possible to convert this to yyyy-mm-dd in a SELECT query (so that I can use DATE_FORMAT on it)? Does MySQL have a date parsing function? Currently the only meth...

urllib2 and json

can anyone point out a tutorial that shows me how to do a POST request using urllib2 with the data being in JSON format?...

How to pass IEnumerable list to controller in MVC including checkbox state?

I have an mvc application in which I am using a model like this: public class BlockedIPViewModel { public string IP { get; set; } public int ID { get; set; } public bool Checked { get; set; } } Now I have a View to bind a list like ...

Clear Application's Data Programmatically

I want to clear my application's data programmatically. Application's data may contain anything like databases, shared preferences, Internal-External files or any other files created within the application. I know we can clear data in the mobile d...

Add column to dataframe with constant value

I have an existing dataframe which I need to add an additional column to which will contain the same value for every row. Existing df: Date, Open, High, Low, Close 01-01-2015, 565, 600, 400, 450 New df: Name, Date, Open, High, Low, Close abc, 01...

What’s the difference between “{}” and “[]” while declaring a JavaScript array?

What’s the difference between “{}” and “[]” while declaring a JavaScript array? Normally I declare like var a=[]; What is the meaning of declaring the array as var a={}...

Android, How can I Convert String to Date?

I store current time in database each time application starts by user. Calendar c = Calendar.getInstance(); String str = c.getTime().toString(); Log.i("Current time", str); In database side, I store current time as string (as you see in ab...

How to modify memory contents using GDB?

I know that we can use several commands to access and read memory: for example, print, p, x... But how can I change the contents of memory at any specific location (while debugging in GDB)? ...

How to check if all inputs are not empty with jQuery

I need to validate a form with jQuery. I can check all my inputs one by one, but it's not a very practical solution. How can i check if all my inputs are non-empty more efficiently? In my form i can have input elements of different types: text, seve...

Javascript to set hidden form value on drop down change

New to javascript, but I'm sure this is easy. Unfortunately, most of the google results haven't been helpful. Anyway, I want to set the value of a hidden form element through javascript when a drop down selection changes. I can use jQuery, if it m...

How to upsert (update or insert) in SQL Server 2005

I have table in which I am inserting rows for employee but next time when I want to insert row I don't want to insert again data for that employee just want to update with required columns if it exits there if not then create new row How can we do t...

Variable used in lambda expression should be final or effectively final

Variable used in lambda expression should be final or effectively final When I try to use calTz it is showing this error. private TimeZone extractCalendarTimeZoneComponent(Calendar cal, TimeZone calTz) { try { cal.getComponents().ge...

How to solve WAMP and Skype conflict on Windows 7?

I have Windows 7 (32-bit) installed on laptop. I downloaded WAMP server and installed it with it's default options. However, I noticed that Apache does not work (while MySQL does work!). I tried to install it via Apache ? Service ? Install Servic...

Plotting 4 curves in a single plot, with 3 y-axes

I have 4 sets of values: y1, y2, y3, y4 and one set x. The y values are of different ranges, and I need to plot them as separate curves with separate sets of values on the y-axis. To put it simple, I need 3 y-axes with different values (scales) for ...

Replace multiple characters in a C# string

Is there a better way to replace strings? I am surprised that Replace does not take in a character array or string array. I guess that I could write my own extension but I was curious if there is a better built in way to do the following? Notice t...

Using the Web.Config to set up my SQL database connection string?

Can anyone help me out please? I'm confused. I want to set up my connection string so I can just call it from my Web.Config file. I need a way to call it from my code, please make a little example. :( I also need help on setting up the Web.Config...

handle textview link click in my android app

I'm currently rendering HTML input in a TextView like so: tv.setText(Html.fromHtml("<a href='test'>test</a>")); The HTML being displayed is provided to me via an external resource, so I cannot change things around as I will, but I can,...

Connect Android Studio with SVN

I have an Android project in Eclipse (Windows) synchronized with SVN, I installed Android Studio (Linux) and I need take the same project from SVN....

How to disable and then enable onclick event on <div> with javascript

Following is the code which i am trying document.getElementById("id").disabled = true; ...

Validate that text field is numeric usiung jQuery

I have a simple issue -- I would like to check a field to see if it's an integer if it is not blank. I'm not using any additional plugins, just jQuery. My code is as follows: if($('#Field').val() != "") { if($('#Field').val().match('^(0|[1-9][0-...

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What is the difference between precision and scale in Oracle? In tutorials they usually leave scale empty and set precision to 6 when creating a primary key. What do precision and scale stand for?...

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I'd like to ask about HTML tag <a href="www.mysite.com" onClick="javascript.function();">Item</a> How to make this a tag working with href and onClick? (prefer onClick running first then href)...

Is there any WinSCP equivalent for linux?

I love WinSCP for Windows. What are the best equivalent softwares for linux? I tried to use sshfs to mount the remote file system on my local machine, but it is not as user friendly as simply launching a GUI, plus it seems to require root access on...

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I'm trying to set an initial value in my jquery ui datepicker. I've tried several different ways, but nothing seems to display the date, it's empty. var idag = new Date(); $("#txtFrom").datepicker("setDate", idag - 2); $("#txtTom").datepicker("setDa...

Slide a layout up from bottom of screen

I have a layout hidden from the view. On a button click I want it to slide up from the bottom pushing the entire screen contents upwards, very similar to how whatsapp shows emoticons panel in chat screen. I have seen SlidingDrawer, that dosen't wor...

Using Panel or PlaceHolder

What is the difference between <asp:Panel > and <asp:PlaceHolder > in ASP.NET? When should you use one over the other?...

WebService Client Generation Error with JDK8

I need to consume a web service in my project. I use NetBeans so I right-clicked on my project and tried to add a new "Web Service Client". Last time I checked, this was the way to create a web service client. But it resulted in an AssertionError, sa...

How to check if a .txt file is in ASCII or UTF-8 format in Windows environment?

I have converted a .txt file from ASCII to UTF-8 using UltraEdit. However, I am not sure how to verify if it is in UTF-8 format in Windows environment. Thank you!...

CSS - Syntax to select a class within an id

What is the selector syntax to select a tag within an id via the class name? For example, what do I need to select below in order to make the inner "li" turn red? <html> <head> <style type="text/css"> #navigation li ...

Transparent scrollbar with css

Now use this code (and many variations of this), but scroll track get dark-grey color, something like #222222 or near this. Find many examples, but all of them give same result. Opera, Chrome and Firefox show this bug. How to fix? #style-3::-webkit-...

Is there a macro to conditionally copy rows to another worksheet?

Is there a macro or a way to conditionally copy rows from one worksheet to another in Excel 2003? I'm pulling a list of data from SharePoint via a web query into a blank worksheet in Excel, and then I want to copy the rows for a particular month to ...

Apache is not running from XAMPP Control Panel ( Error: Apache shutdown unexpectedly. This may be due to a blocked port)

I have installed XAMPP (xampp-win32-1.8.2-0-VC9-installer.exe) on Windows 7 successfully. But unfortunately, the following error was found during running Apache from XAMPP Control Panel: 5:38:38 PM [Apache] Error: Apache shutdown unexpectedly. ...

Set encoding and fileencoding to utf-8 in Vim

What is the difference between these two commands? set encoding=utf-8 set fileencoding=utf-8 Do I need to set both when I want to use utf-8? Also, do I need to set fileencoding with set or setglobal?...

Apply function to each element of a list

How do I apply a function to the list of variable inputs? For e.g. the filter function returns true values but not the actual output of the function. from string import upper mylis=['this is test', 'another test'] filter(upper, mylis) ['this is tes...

Write variable to a file in Ansible

I am pulling JSON via the URI module and want to write the received content out to a file. I am able to get the content and output it to the debugger so I know the content has been received, but I do not know the best practice for writing files....

JPG vs. JPEG image formats

I often use JPEG images, and I have noticed that there are two very similar file extensions: .jpg, which my mobile's camera and the Preview application use, and .jpeg, with which Image Capture saves the images from scanning with my Canon MX455 printe...

I want to add a JSONObject to a JSONArray and that JSONArray included in other JSONObject

I need below kind of structure constructed in java and send it as response : var abc = { "action": "Remove", "datatable": [ { "userid": "userid0", "username": "name0" }, ...

Android Studio Emulator and "Process finished with exit code 0"

I've updated android studio from 3.0 to 3.0.1 but when I launch Emulator it didn't get launched and gives message in event log: Emulator: Process finished with exit code 0 ...

Blocks and yields in Ruby

I am trying to understand blocks and yield and how they work in Ruby. How is yield used? Many of the Rails applications I've looked at use yield in a weird way. Can someone explain to me or show me where to go to understand them?...

WordPress: get author info from post id

Or even the author id from the post id. I am trying to return the author meta (author page link and avatar) in the sidebar of a single post page (outside of the post loop). What is the best way to do this? I am using a custom function (see below) to ...

Different names of JSON property during serialization and deserialization

Is it possible: to have one field in class, but different names for it during serialization/deserialization in Jackson library? For example, I have class "Coordiantes". class Coordinates{ int red; } For deserialization from JSON want to have fo...

React prevent event bubbling in nested components on click

Here's a basic component. Both the <ul> and <li> have onClick functions. I want only the onClick on the <li> to fire, not the <ul>. How can I achieve this? I've played around with e.preventDefault(), e.stopPropagation(), to n...

Twitter bootstrap scrollable modal

I'm using twitter bootstrap for a project I am working on. I have a modal window that has a somewhat longer form in it and I didn't like that when the window got too small the modal didn't scroll (if just disappeared off my page which isn't scrolla...

Django Admin - change header 'Django administration' text

How does one change the 'Django administration' text in the django admin header? It doesn't seem to be covered in the "Customizing the admin" documentation....

Nesting await in Parallel.ForEach

In a metro app, I need to execute a number of WCF calls. There are a significant number of calls to be made, so I need to do them in a parallel loop. The problem is that the parallel loop exits before the WCF calls are all complete. How would you r...

How to enable cross-origin resource sharing (CORS) in the express.js framework on node.js

I'm trying to build a web server in node.js that will support cross-domain scripting, while still providing static files from a public directory. I'm using the express.js and am not really sure how to allow cross-domain scripting (Access-Control-Allo...

Check if a string is a date value

What is an easy way to check if a value is a valid date, any known date format allowed. For example I have the values 10-11-2009, 10/11/2009, 2009-11-10T07:00:00+0000 which should all be recognized as date values, and the values 200, 10, 350, which...

Convert java.time.LocalDate into java.util.Date type

I want to convert java.time.LocalDate into java.util.Date type. Because I want to set the date into JDateChooser. Or is there any date chooser that supports java.time dates?...

How to use nanosleep() in C? What are `tim.tv_sec` and `tim.tv_nsec`?

What is the use of tim.tv_sec and tim.tv_nsec in the following? How can I sleep execution for 500000 microseconds? #include <stdio.h> #include <time.h> int main() { struct timespec tim, tim2; tim.tv_sec = 1; tim.tv_nsec = 500;...

Open page in new window without popup blocking

Hope you can help a bit here... I have a form that translate a word in a field, populate the field with the translated term and then do submit action all in one submit button. the submit is being made by jquery. problem is the target page is being b...

Gradients in Internet Explorer 9

Does anyone know the vendor prefix for gradients within IE9 or are we still supposed to still be using their proprietry filters? What I've got for the other browsers is: background-image: -moz-linear-gradient(top, #444444, #999999); /* FF3.6 */ bac...

Node.js: for each … in not working

I wanted to use for each ... in with Node.js (v0.4.11). I use it like this: var conf = { index: { path: { first: "index.html", pattern: "index/{num}.html" }, template: "index.tpl", limit: 8 }, feed...

Using setattr() in python

I am looking for someone to explain the basics of how to use, and not use setattr(). My problem arose trying to use one class method/function to return data that is then put in another method/function. Perhaps a simpler approach would be much better...

append new row to old csv file python

I am trying to add a new row to my old csv file. Basically, it gets updated each time I run the Python script. Right now I am storing the old csv rows values in a list and then deleting the csv file and creating it again with the new list value. W...

Print multiple arguments in Python

This is just a snippet of my code: print("Total score for %s is %s ", name, score) But I want it to print out: "Total score for (name) is (score)" where name is a variable in a list and score is an integer. This is Python 3.3 if that helps ...

Showing which files have changed between two revisions

I want to merge two branches that have been separated for a while and wanted to know which files have been modified. Came across this link: http://linux.yyz.us/git-howto.html which was quite useful. The tools to compare branches I've come across ar...

Typescript react - Could not find a declaration file for module ''react-materialize'. 'path/to/module-name.js' implicitly has an any type

I am trying to import components from react-materialize as - import {Navbar, NavItem} from 'react-materialize'; But when the webpack is compiling my .tsx it throws an error for the above as - ERROR in ./src/common/navbar.tsx (3,31): error TS7016: Co...

How can I get a list of all open named pipes in Windows?

Is there an easy way to test whether your named pipe is working correctly? I want to make sure that the data I'm sending from my app is actually being sent. Is there a quick and easy way to get a list of all the named pipes?...

Difference between timestamps with/without time zone in PostgreSQL

Are timestamp values stored differently in PostgreSQL when the data type is WITH TIME ZONE versus WITHOUT TIME ZONE? Can the differences be illustrated with simple test cases?...

How to set up a cron job to run an executable every hour?

I need to set up a cron job that runs an executable compiled using gcc once every hour. I logged in as root and typed crontab -e Then I entered the following and saved the file. 0 * * * * /path_to_executable However, the cron job does not work....

SQL Transaction Error: The current transaction cannot be committed and cannot support operations that write to the log file

I'm having a similar issue to The current transaction cannot be committed and cannot support operations that write to the log file, but I have a follow-up question. The answer there references Using TRY...CATCH in Transact-SQL, which I'll come back ...

How to update single value inside specific array item in redux

I have an issue where re-rendering of state causes ui issues and was suggested to only update specific value inside my reducer to reduce amount of re-rendering on a page. this is example of my state { name: "some name", subtitle: "some subtitle",...

How to post data in PHP using file_get_contents?

I'm using PHP's function file_get_contents() to fetch contents of a URL and then I process headers through the variable $http_response_header. Now the problem is that some of the URLs need some data to be posted to the URL (for example, login pages)...

Angular 2 ngfor first, last, index loop

I'm trying to set as default the first occurrence in this example: plunkr getting the following error: Unhandled Promise rejection: Template parse errors: TypeError: Cannot read property 'toUpperCase' of undefined ("dButtonToggleGroup&qu...

Convert a timedelta to days, hours and minutes

I've got a timedelta. I want the days, hours and minutes from that - either as a tuple or a dictionary... I'm not fussed. I must have done this a dozen times in a dozen languages over the years but Python usually has a simple answer to everything so...

Sorting dictionary keys in python

I have a dict where each key references an int value. What's the best way to sort the keys into a list depending on the values?...

Laravel Eloquent: Ordering results of all()

I'm stuck on a simple task. I just need to order results coming from this call $results = Project::all(); Where Project is a model. I've tried this $results = Project::all()->orderBy("name"); But it didn't work. Which is the better way to ...