Examples On Programing Languages

How to get the date from the DatePicker widget in Android?

I use a DatePicker widget in Android for the user to set a date, and want to get the date value when a confirm button is clicked, how can I do that?...

Meaning of "487 Request Terminated"

Please tell me when a SIP call return 487 Request Terminated? Is it a termination issue?...

Add space between cells (td) using css

I am trying to add a table with space between cell as the background colour of the cell is white and the background color of the table is blue, you can easily see that padding and margin are not working (I am applying it to the td), it will only add ...

Show and hide a View with a slide up/down animation

I have a LinearLayout that I want to show or hide with an Animation that pushes the layout upwards or downwards whenever I change its visibility. I've seen a few samples out there but none of them suit my needs. I have created two xml files for the...

MomentJS getting JavaScript Date in UTC

I am not able to get the JavaScript Date string for MongoDB record via the following. It keeps using my local time. var utc = moment.utc().valueOf(); console.log(moment.utc(utc).toDate()); Output: Tue Nov 11 2014 14:42:51 GMT-0500 (EST) I need ...

Check whether a request is GET or POST

Possible Duplicate: PHP detecting request type (GET, POST, PUT or DELETE) This should be an easy one. I have a script, and in the script I want to determine whether the request arrive via GET or POST method. What is the correct way to d...

Make Font Awesome icons in a circle?

I am using font awesome on some project but I have some things that I want to do with font awesome icons, I can easily call an icon like this: <i class="fa fa-lock"></i> Is it possible to all icon always be in round circle with...

How do I reference to another (open or closed) workbook, and pull values back, in VBA? - Excel 2007

Basically I need to gather a fair few figures from another workbook (Which is found and can be opened by a UserForm, therefore the location and names are variable). I need to use VBA for this as I also need to populate a chart with this data. I would...

SELECT only rows that contain only alphanumeric characters in MySQL

I'm trying to select all rows that contain only alphanumeric characters in MySQL using: SELECT * FROM table WHERE column REGEXP '[A-Za-z0-9]'; However, it's returning all rows, regardless of the fact that they contain non-alphanumeric characters....

How to INNER JOIN 3 tables using CodeIgniter

Can someone Tell me how to join 3 table with php? Example SELECT FROM table1, table2,table on INNERJOIN ------------------- let I have 3 table.(question table ,answer table and category table) Here is example form my webpage. Time remaining 30 mi...

How to find which version of Oracle is installed on a Linux server (In terminal)

I am in terminal in Redhat 5.5 and I need to find out which version of Oracle is installed. I am pretty new at Linux, but I have searched Google for a while and I can't find what I need. I have to locate which version is installed via terminal. I fou...

TSQL CASE with if comparison in SELECT statement

I would like to use CASE statement in SELECT. I select from user table, and (as one attribute) I also use nested SQL: SELECT registrationDate, (SELECT COUNT(*) FROM Articles WHERE userId = Users.userId) as articleNumber, hobbies, ... FR...

Footnotes for tables in LaTeX

When I do \footnote{} for a value in a table, the footnote doesn't show up. How do I get it to show up? Also, is it possible to get it to show up at the bottom of the table rather than the bottom of the page?...

How to use a WSDL

I need to consume a Web Service. They sent me the WSDL file. What should I do to add it to my website and start using it as the proxy. ( If I put it on a Virtual Directory it can be discovered, but does it grant me the connection with the real web s...

TypeError: You provided an invalid object where a stream was expected. You can provide an Observable, Promise, Array, or Iterable

I am trying to map from a service call but getting an error. Looked at subscribe is not defined in angular 2? and it said that in order to subscribe we need to return from inside the operators. I have return statements as well. Here's my code: chec...

How to reverse apply a stash?

I have a small patch saved away in my git stash. I've applied it to my working copy using git stash apply. Now, I'd like to back out those changes by reverse applying the patch (kind of like what git revert would do but against the stash). Does an...

How to resolve cURL Error (7): couldn't connect to host?

I send an item code to a web service in xml format using cUrl(php). I get the correct response in localhost, but when do it server it shows cURL Error (7): couldn't connect to host And here's my code: function xml_post($post_xml, $url) { ...

How to get first N number of elements from an array

I am working with Javascript(ES6) /FaceBook react and trying to get the first 3 elements of an array that varies in size. I would like do the equivalent of Linq take(n). In my Jsx file I have the following: var items = list.map(i => { return ...

Bad operand type for unary +: 'str'

I cannot figure out a problem I am having with code written in Python 2.7. I am converting the references to ints, but I keep getting a type exception bad operand type for unary +: 'str'. Can anyone assist? import urllib2 import time import datetime...

How to create a XML object from String in Java?

I am trying to write a code that helps me to create a XML object. For example, I will give a string as input to a function and it will return me a XMLObject. XMLObject convertToXML(String s) {} When I was searching on the net, generally I saw exam...

node.js shell command execution

I am still trying to grasp the finer points of how I can run a linux or windows shell command and capture output within node.js; ultimately, I want to do something like this... //pseudocode output = run_command(cmd, args) The important piece is th...

What's the best way to loop through a set of elements in JavaScript?

In the past and with most my current projects I tend to use a for loop like this: var elements = document.getElementsByTagName('div'); for (var i=0; i<elements.length; i++) { doSomething(elements[i]); } I've heard that using a "reverse whil...

Unlimited Bash History

I want my .bash_history file to be unlimited. e.g. So I can always go back and see how I built/configured something, or what that nifty command was, or how some command broke something weeks ago. How do I change this setting?...

Authentication failed because remote party has closed the transport stream

I am developing a TCP client to connect OpenSSL server with the certificate authentication. I have using .crt and .key files shared by server team. These certificates are generated by OpenSSL commands. I am using SslStream object to authenticate the...

Sequelize OR condition object

By creating object like this var condition= { where: { LastName:"Doe", FirstName:["John","Jane"], Age:{ gt:18 } } } and pass it in Student.findAll(condition) .success(function(students){ }) It could beautif...

PHP page redirect

Can PHP make a redirect call after executing a function? I am creating a function on the completion of which I want it to redirect to a file located in the same root folder. Can it be done? if (...) { // I am using echo here. } else if ($_SESS...

How to set up Automapper in ASP.NET Core

I'm relatively new at .NET, and I decided to tackle .NET Core instead of learning the "old ways". I found a detailed article about setting up AutoMapper for .NET Core here, but is there a more simple walkthrough for a newbie?...

Throughput and bandwidth difference?

The throughput of a channel is a measure of amount of data actually moves through the channel. Why is it substantially less than the bandwidth of the channel?...

SASS :not selector

I have a :not css selector in SASS mixin but it doesn't do anything: Code Snippet: @mixin dropdown-pos($pos:right) { &:not(.notip) { @if $comp-tip == true{ @if $pos == right { top:$dropdown-width * -0.6; @include tip...

Ajax request returns 200 OK, but an error event is fired instead of success

I have implemented an Ajax request on my website, and I am calling the endpoint from a webpage. It always returns 200 OK, but jQuery executes the error event. I tried a lot of things, but I could not figure out the problem. I am adding my code below:...

Json.NET serialize object with root name

In my web app I'm using Newtonsoft.Json and I have following object [Newtonsoft.Json.JsonObject(Title = "MyCar")] public class Car { [Newtonsoft.Json.JsonProperty(PropertyName = "name")] public string Name{get;set;} [Newtonsoft.Json.Jso...

Sample random rows in dataframe

I am struggling to find the appropriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out?...

Bootstrap Modal sitting behind backdrop

So I'm having nearly the exact same problem as @Jamescoo was but I think that my issue is coming from the fact that I have already positioned a couple of DIVs to create a sliding nav panel. Here's my exact setup replicated: http://jsfiddle.net/ZBQ8...

Collections sort(List<T>,Comparator<? super T>) method example

Possible Duplicate: Sorting Java objects using multiple keys I can't find any example of using this method, all examples give the second parameter "null". I heard that this method used for sorting classes according to more than one criteri...

How do I append to a table in Lua

I'm trying to figure out the equivalent of: foo = [] foo << "bar" foo << "baz" I don't want to have to come up with an incrementing index. Is there an easy way to do this?...

RegExp matching string not starting with my

For PMD I'd like to have a rule which warns me of those ugly variables which start with my. This means I have to accept all variables which do NOT start with my. So, I need a RegEx (re) which behaves as follows: re.match('myVar') == false re.ma...

Add Header and Footer for PDF using iTextsharp

How can I add header and footer for each page in the pdf. Headed will contain just a text Footer will contain a text and pagination for pdf (Page : 1 of 4) How is this possible ? I tried to add the below line, but header does not show up in pdf. d...

Excel VBA - Sum up a column

I'm trying to sum up a column in Excel VBA , however because there are blank spaces, I'm getting 0 as the sum. Dim rExternalTotal As Range , dExternalTotal as Double Set rExternalTotal = Range(rReportData.Offset(0, 0), rReportData.Offset(261, 0).End...

The APR based Apache Tomcat Native library was not found on the java.library.path

I'm newly at server development and have been started from easy tutorial by Lars Vogel. Servlet and JSP development with Eclipse WTP . Step by step accord this tutorial: installed Eclipse Java EE Kepler; installed tomcat 7 on Ubuntu 12.04 - htt...

Microsoft Excel ActiveX Controls Disabled?

I have some Excel worksheets that use ActiveX checkboxes to control certain activity. They worked recently but today started to give errors. I was alerted to this by a colleague, but it was still working on my computer. I checked his version of Ex...

How can I undo git reset --hard HEAD~1?

Is it possible to undo the changes caused by the following command? If so, how? git reset --hard HEAD~1 ...

Excel VBA App stops spontaneously with message "Code execution has been halted"

From what I can see on the web, this is a fairly common complaint, but answers seem to be rarer. The problem is this: We have a number of Excel VBA apps which work perfectly on a number of users' machines. However on one machine they stop on certain...

Twig ternary operator, Shorthand if-then-else

Does Twig support ternary (shorthand if-else) operator? I need some conditional logic like: {%if ability.id in company_abilities %} <tr class="selected"> {%else%} <tr> {%endif%} but using shorthand in Twig....

How to concatenate two IEnumerable<T> into a new IEnumerable<T>?

I have two instances of IEnumerable<T> (with the same T). I want a new instance of IEnumerable<T> which is the concatenation of both. Is there a build-in method in .Net to do that or do I have to write it myself?...

How do I set the maximum line length in PyCharm?

I am using PyCharm on Windows and want to change the settings to limit the maximum line length to 79 characters, as opposed to the default limit of 120 characters. Where can I change the maximum amount of characters per line in PyCharm?...

How to run a single RSpec test?

I have the following file: /spec/controllers/groups_controller_spec.rb What command in terminal do I use to run just that spec and in what directory do I run the command? My gem file: # Test ENVIRONMENT GEMS group :development, :test do gem ...

Determine path of the executing script

I have a script called foo.R that includes another script other.R, which is in the same directory: #!/usr/bin/env Rscript message("Hello") source("other.R") But I want R to find that other.R no matter what the current working directory. In other...

Make Bootstrap's Carousel both center AND responsive?

I want my carousel images to be at the center (horizontally), which is not by default. I follow the solution at this topic. However, using this solution, when the carousel is resized and smaller than the image, the image is cropped instead of scalin...

Sql server - log is full due to ACTIVE_TRANSACTION

I have a very large database (50+ GB). In order to free space in my hard drive, I tried deleting old records from one of the tables . I ran the command: delete from Table1 where TheDate<'2004-01-01'; However, SQL Server 2012 said: Msg 9002, Le...

Change bootstrap datepicker date format on select

I'm using bootstrap datepicker on a textbox. The default format of the date when you select a date is mm/dd/yyyy. Now I want to change it to dd/mm/yyyy. How can I accomplish this. Right now I'm just initializing it just like this. $('.datepicker')....

Replace all double quotes within String

I am retrieving data from a database, where the field contains a String with HTML data. I want to replace all of the double quotes such that it can be used for parseJSON of jQuery. Using Java, I am trying to replace the quotes using.. details.repla...

iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?

I'm working on an iPad-based web app, and need to prevent overscrolling so that it seems less like a web page. I'm currently using this to freeze the viewport and disable overscroll: document.body.addEventListener('touchmove',function(e){ e.pr...

How do I change a single value in a data.frame?

Could anyone explain how to change a single cell in a data.frame to something else. Basically I just want to rename that one cell, not all cells which matches it. I can´t use the edit() command because it will screw up my script since im using the d...

How to display line numbers in 'less' (GNU)

What is the command to make less display line numbers in the left column?...

How to read a Parquet file into Pandas DataFrame?

How to read a modestly sized Parquet data-set into an in-memory Pandas DataFrame without setting up a cluster computing infrastructure such as Hadoop or Spark? This is only a moderate amount of data that I would like to read in-memory with a simple P...

How to get the current directory of the cmdlet being executed

This should be a simple task, but I have seen several attempts on how to get the path to the directory where the executed cmdlet is located with mixed success. For instance, when I execute C:\temp\myscripts\mycmdlet.ps1 which has a settings file at C...

How can I solve equations in Python?

Let's say I have an equation: 2x + 6 = 12 With algebra we can see that x = 3. How can I make a program in Python that can solve for x? I'm new to programming, and I looked at eval() and exec() but I can't figure out how to make them do what I want....

Is there a way to rollback my last push to Git?

Possible Duplicates: Undoing a 'git push' I have pushed some bad code, and I am the only user of the repository. How can I rollback my last commit?...

Create Table from View

I have a view that I want to create a table from in SQL Enterprise Manager, but I always get an error when I run this query: CREATE TABLE A AS (SELECT top 10 FROM dbo.myView) So far the error is: "syntax error at 'as'" View is too large. Is it ...

PostgreSQL: ERROR: operator does not exist: integer = character varying

Here i am trying to create view as shown below in example: Example: create view view1 as select table1.col1,table2.col1,table3.col3 from table1 inner join table2 inner join table3 on table1.col4 = table2.col5 /* Here col4 of tabl...

How to 'grep' a continuous stream?

Is that possible to use grep on a continuous stream? What I mean is sort of a tail -f <file> command, but with grep on the output in order to keep only the lines that interest me. I've tried tail -f <file> | grep pattern but it seems th...

stop all instances of node.js server

This is my first time working with Node.js and I ran into this problem: I have started a Node server through the plugin of an IDE. Unfortunately, I cannot use the IDE's terminal. So I tried to run the script from the command line. This is the probl...

Trigger validation of all fields in Angular Form submit

I'm using this method: http://plnkr.co/edit/A6gvyoXbBd2kfToPmiiA?p=preview to only validate fields on blur. This works fine, but I would also like to validate them (and thus show the errors for those fields if any) when the user clicks the 'submit' b...

Errors in pom.xml with dependencies (Missing artifact...)

A friend has passed me a Maven project that I'm trying to run locally in my computer. All that I have done in Eclipse, I selected: File -> Import -> Existing Maven Projects After that, the project showed me 4 errors in my pom.xml (Missing artif...

How to get multiple counts with one SQL query?

I am wondering how to write this query. I know this actual syntax is bogus, but it will help you understand what I am wanting. I need it in this format, because it is part of a much bigger query. SELECT distributor_id, COUNT(*) AS TOTAL, COUNT(*)...

CSS - Make divs align horizontally

I have a container div with a fixed width and height, with overflow: hidden. I want a horizontal row of float: left divs within this container. Divs which are floated left will naturally push onto the 'line' below after they read the right bound of ...

Tkinter: How to use threads to preventing main event loop from "freezing"

I have a small GUI test with a "Start" button and a Progress bar. The desired behavior is: Click Start Progressbar oscillates for 5 seconds Progressbar stops The observed behavior is the "Start" button freezes for 5 seconds, then a Progressbar is...

How can I get a list of locally installed Python modules?

I would like to get a list of Python modules, which are in my Python installation (UNIX server). How can you get a list of Python modules installed in your computer?...

Error checking for NULL in VBScript

I have the following VBScript in a Classic ASP page: function getMagicLink(fromWhere, provider) dim url url = "magic.asp?fromwhere=" & fromWhere If Not provider is Nothing Then ' Error occurs here url = url & "&provi...

ActionController::InvalidAuthenticityToken

Below is an error, caused by a form in my Rails application: Processing UsersController#update (for **ip** at 2010-07-29 10:52:27) [PUT] Parameters: {"commit"=>"Update", "action"=>"update", "_method"=>"put", "authenticity_token"=>"ysiD...

Command to close an application of console?

I need to close the console when the user selects a menu option. I tried using close() but it did not work.. how can I do this?...

Android screen size HDPI, LDPI, MDPI

I have a background that I need fit in all screen sizes. I have three folders, hdpi, ldpi and mdpi for drawables, but in the emulator there isn't any referense to what resolution hdpi is and what mdpi and ldpi are....

How do you attach and detach from Docker's process?

I can attach to a docker process but Ctrl+c doesn't work to detach from it. exit basically halts the process. What's the recommended workflow to have the process running, occasionally attaching to it to make some changes, and then detaching?...

What is the most efficient way to store tags in a database?

I am implementing a tagging system on my website similar to one stackoverflow uses, my question is - what is the most effective way to store tags so that they may be searched and filtered? My idea is this: Table: Items Columns: Item_ID, Title, Cont...

Spring 3 MVC accessing HttpRequest from controller

I would like to handle request and session attributes myself rather then leave it to spring @SessionAttributes, for login of cookies handling for example. I just cant figure out how could I access the HttpRequest from within a controller, I need a ...

scrollbars in JTextArea

How do I add scrollbars to a JTextArea?...

Node.js: How to read a stream into a buffer?

I wrote a pretty simple function that downloads an image from a given URL, resize it and upload to S3 (using 'gm' and 'knox'), I have no idea if I'm doing the reading of a stream to a buffer correctly. (everything is working, but is it the correct wa...

How to show git log history (i.e., all the related commits) for a sub directory of a git repo?

Lets say that I have a git repo that looks like this. foo/ .git/ A/ ... big tree here B/ ... big tree here Is there a way to ask git log to show only the log messages for a specific directory. For example I want to see what commits tou...

System.BadImageFormatException An attempt was made to load a program with an incorrect format

I'm writing a plug-in for another program that is based on a public .NET API. Typically these plugins are made by creating a class library DLL that references the API assembly. Then a command class is created by inheriting from a base command class i...

Get full path without filename from path that includes filename

Is there anything built into System.IO.Path that gives me just the filepath? For example, if I have a string @"c:\webserver\public\myCompany\configs\promo.xml", is there any BCL method that will give me "c:\webserver\public\myCompany\con...

Python logging: use milliseconds in time format

By default logging.Formatter('%(asctime)s') prints with the following format: 2011-06-09 10:54:40,638 where 638 is the millisecond. I need to change the comma to a dot: 2011-06-09 10:54:40.638 To format the time I can use: logging.Formatter(fm...

Could not load file or assembly 'System.Data.SQLite'

I've installed ELMAH 1.1 .Net 3.5 x64 in my ASP.NET project and now I'm getting this error (whenever I try to see any page): Could not load file or assembly 'System.Data.SQLite, Version=1.0.61.0, Culture=neutral, PublicKeyToken=db937bc2d44f...

Difference between CLOCK_REALTIME and CLOCK_MONOTONIC?

Could you explain the difference between CLOCK_REALTIME and CLOCK_MONOTONIC clocks returned by clock_gettime() on Linux? Which is a better choice if I need to compute elapsed time between timestamps produced by an external source and the current tim...

SQL Server: the maximum number of rows in table

I develop software that stores a lot of data in one of its database tables (SQL Server version 8, 9 or 10). Let's say, about 100,000 records are inserted into that table per day. This is about 36 million records per year. For fear that I would lose o...

Wrapping a react-router Link in an html button

Using suggested method: This is the result: A link in the button, Code in between comment lines I was wondering if there is a way to wrap a Link element from 'react-router' in an HTML button tag using react. I currently have Link components to navi...

Renew Provisioning Profile

Just got a notice that the provisioning profile for one of my apps is about to expire. Is there some way I can renew the existing one or must I recreate a new one?...

403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied

I have my website. First time I can succesfully login. Default address: www.abc.com I typed this on browser and I redirected to my login page: www.abc.com/pages/landingpage.aspx I entered my login credential and log into the site. After some ti...

DateTime.TryParse issue with dates of yyyy-dd-MM format

I have the following date in string format "2011-29-01 12:00 am" . Now I am trying to convert that to datetime format with the following code: DateTime.TryParse(dateTime, out dt); But I am alwayws getting dt as {1/1/0001 12:00:00 AM} , Can you p...

How to check if std::map contains a key without doing insert?

The only way I have found to check for duplicates is by inserting and checking the std::pair.second for false, but the problem is that this still inserts something if the key is unused, whereas what I want is a map.contains(key); function....

Angular: How to update queryParams without changing route

I am trying to update (add, remove) queryParams from a component. In angularJS, it used to be possible thanks to : $location.search('f', 'filters[]'); // setter $location.search()['filters[]']; // getter I have an app with a list that the user ...

How to comment/uncomment in HTML code

Often while coding view templates in html, my habit of adding some helpful comments causes lots of time-consuming effort while testing. Consider this code...  <div id="sidebar"> .... </div> <!--...

how to redirect to home page

How can I redirect a user to home page? Example: mywebsite.com/ddfdf/fdfdsf and I want to redirect to mywebsite.com However I want to do it without typing the static name. How can I do this?...

How to change target build on Android project?

I currently have an Android project in Eclipse. I created it with a target build of 1.5 (sdk 3). Now I want to change it so that it has a minSdk of 3 and targetSdk of 8. To do this I see that I must build against the newest SDK (2.2) To do this i...

How do SETLOCAL and ENABLEDELAYEDEXPANSION work?

I notice in most scripts, the two are usually in the same line as so: SETLOCAL ENABLEDELAYEDEXPANSION Are the two in fact separate commands and can be written on separate lines? Will setting ENABLEDELAYEDEXPANSION have an adverse effect on a scri...

lambda expression for exists within list

If I want to filter a list of objects against a specific id, I can do this: list.Where(r => r.Id == idToCompare); What if, instead of a single idToCompare, I have a list of Ids to compare against? What is the syntax for comparing against a ...

Redraw datatables after using ajax to refresh the table content?

I am using Datatables and have a button on the page that refreshes the table using AJAX. To be clear the table isn't using an ajax source of data, we are just using ajax to refresh it only when needed. Ajax is refreshing the div which the table is wr...

PowerShell: Run command from script's directory

I have a PowerShell script that does some stuff using the script’s current directory. So when inside that directory, running .\script.ps1 works correctly. Now I want to call that script from a different directory without changing the referencing d...

How to delete all files older than 3 days when "Argument list too long"?

I've got a log file directory that has 82000 files and directories in it (about half and half). I need to delete all the file and directories which are older than 3 days. In a directory that has 37000 files in it, I was able to do this with: find ...

How to get folder directory from HTML input type "file" or any other way?

So I have a basic form input with the type "file" however I want the user to be able to select a folder location and not a file. How can I get this input to select a folder and not a file, or is there another way to do it?...

Printing the correct number of decimal points with cout

I have a list of float values and I want to print them with cout with 2 decimal places. For example: 10.900 should be printed as 10.90 1.000 should be printed as 1.00 122.345 should be printed as 122.34 How can I do this? ( setprecision doesn'...

Use python requests to download CSV

Here is my code: import csv import requests with requests.Session() as s: s.post(url, data=payload) download = s.get('url that directly download a csv report') This gives me the access to the csv file. I tried different method to deal wit...

copy db file with adb pull results in 'permission denied' error

I just rooted my Nexus 5 using this method: http://www.phonearena.com/news/How-to-root-Google-Nexus-5_id49014 I also enabled USB debugging in the developer options. Then I tried to pull a database file from my device using this command: adb pull...

enable/disable zoom in Android WebView

There are some methods in WebSettings related to zoom: WebSettings.setSupportZoom WebSettings.setBuiltInZoomControls I noticed they work differently on some devices. For example, on my Galaxy S pinch to zoom is enabled by default, but on LG P500 ...

Reset auto increment counter in postgres

I would like to force the auto increment field of a table to some value, I tried with this: ALTER TABLE product AUTO_INCREMENT = 1453 AND ALTER SEQUENCE product RESTART WITH 1453; ERROR: relation "your_sequence_name" does not exist I'm new t...

Textarea Auto height

I want to make height of textarea equal to height of the text within it (And remove the scroll bar) HTML <textarea id="note">SOME TEXT</textarea> CSS textarea#note { width:100%; direction:rtl; display:block; max-width...

How can I initialize base class member variables in derived class constructor?

Why can't I do this? class A { public: int a, b; }; class B : public A { B() : A(), a(0), b(0) { } }; ...

Merging dataframes on index with pandas

I have two dataframes and each one has two index columns. I would like to merge them. For example, the first dataframe is the following: V1 A 1/1/2012 12 2/1/2012 14 B 1/1/2012 15 2/1/2012 8 C ...

Access Google's Traffic Data through a Web Service

Is there a way I can access traffic data that Google provides through a web service? There seems to be a GTrafficOverlay that puts traffic on top of a route on an embedded google map, but no direct web service that I can consume to, say, give the so...

Floating Point Exception C++ Why and what is it?

I'm building a program for the Euler projects question 3, and while that might not really matter as a result I'm current trying to make this code take a number and test if it is prime or not. Now then before I get to troubleshoot the function it give...

How to delete a cookie?

Is my function of creating a cookie correct? How do I delete the cookie at the beginning of my program? is there a simple coding? function createCookie(name,value,days) function setCookie(c_name,value,1) { document.cookie = c_name + "=" +escap...

C Programming: How to read the whole file contents into a buffer

I want to write the full contents of a file into a buffer. The file actually only contains a string which i need to compare with a string. What would be the most efficient option which is portable even on linux. ENV: Windows...

Fastest way to get the first n elements of a List into an Array

What is the fastest way to get the first n elements of a list stored in an array? Considering this as the scenario: int n = 10; ArrayList<String> in = new ArrayList<>(); for(int i = 0; i < (n+10); i++) in.add("foobar"); Option 1:...

Call a function after previous function is complete

I have the following JavaScript code: $('a.button').click(function(){ if (condition == 'true'){ function1(someVariable); function2(someOtherVariable); } else { doThis(someVariable); } }); How can I ensure th...

How to install bcmath module?

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I have a shell script which I want to run without using the "sh" or "bash" commands. For example: Instead of: sh script.sh I want to use: script.sh How can I do this? P.S. (i) I don't use shell script much and I tried reading about aliases, but I...

How to access share folder in virtualbox. Host Win7, Guest Fedora 16?

I'm a newbie in linux. I installed Fedora 16 OS as guest in virtualbox on Window 7. Now, I want to access share folder from Fedora. Here is something I did: Install guest addtion [OK] Make share folder link to virtualbox [OK]. Share folder path in ...

How to get the last characters in a String in Java, regardless of String size

I'm looking for a way to pull the last characters from a String, regardless of size. Lets take these strings into example: "abcd: efg: 1006746" "bhddy: nshhf36: 1006754" "hfquv: nd: 5894254" As you can see, completely random strings, but they have...

Remove duplicates from dataframe, based on two columns A,B, keeping row with max value in another column C

I have a pandas dataframe which contains duplicates values according to two columns (A and B): A B C 1 2 1 1 2 4 2 7 1 3 4 0 3 4 8 I want to remove duplicates keeping the row with max value in column C. This would lead to: A B C 1 2 4 2 7 1 3 4 ...

Best way to check if MySQL results returned in PHP?

I'm looking for the best way to check and see if any results were returned in a query. I feel like I write this part of code a lot and sometimes I get errors, and sometimes I don't. For example, I run this query to check if a username exists before ...

Check if something is (not) in a list in Python

I have a list of tuples in Python, and I have a conditional where I want to take the branch ONLY if the tuple is not in the list (if it is in the list, then I don't want to take the if branch) if curr_x -1 > 0 and (curr_x-1 , curr_y) not in myLis...

Best practice for localization and globalization of strings and labels

I'm a member of a team with more than 20 developers. Each developer works on a separate module (something near 10 modules). In each module we might have at least 50 CRUD forms, which means that we currently have near 500 add buttons, save buttons, ed...

Rollback transaction after @Test

First of all, I've found a lot of threads on StackOverflow about this, but none of them really helped me, so sorry to ask possibly duplicate question. I'm running JUnit tests using spring-test, my code looks like this @RunWith(SpringJUnit4ClassRunn...

Binary Data in JSON String. Something better than Base64

The JSON format natively doesn't support binary data. The binary data has to be escaped so that it can be placed into a string element (i.e. zero or more Unicode chars in double quotes using backslash escapes) in JSON. An obvious method to escape bi...

How to use NULL or empty string in SQL

I would like to know how to use NULL and an empty string at the same time in a WHERE clause in SQL Server. I need to find records that have either null values or an empty string. Thanks....

How to format DateTime in Flutter , How to get current time in flutter?

I am trying to display the current DateTime in a Text widget after tapping on a button. The following works, but I'd like to change the format. Current approach DateTime now = DateTime.now(); currentTime = new DateTime(now.year, now.month, now.day,...

CSS image resize percentage of itself?

I am trying to resize an img with a percentage of itself. For example, I just want to shrink the image by half by resizing it to 50%. But applying width: 50%; will resize the image to be 50% of the container element (the parent element which maybe th...

What does the 'Z' mean in Unix timestamp '120314170138Z'?

I have an X.509 certificate which has the following 2 timestamps: ['validFrom'] = String(13) "120314165227Z" ['validTo'] = String(13) "130314165227Z" What does the postfix character 'Z' mean. Does it specify the timezone?...

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...

How to define constants in ReactJS

I have a function that maps text to letters: sizeToLetterMap: function() { return { small_square: 's', large_square: 'q', thumbnail: 't', small_240: 'm', small_320...

How to enter a multi-line command

Is it possible to split a PowerShell command line over multiple lines? In Visual Basic I can use the underscore (_) to continue the command in the next line....

git ahead/behind info between master and branch?

I have created a branch for testing in my local repo (test-branch) which I pushed to Github. If I go to my Github account and select this test-branch it shows the info: This branch is 1 commit ahead and 2 commits behind master My questions are: ...

Difference between except: and except Exception as e: in Python

Both the following snippets of code do the same thing. They catch every exception and execute the code in the except: block Snippet 1 - try: #some code that may throw an exception except: #exception handling code Snippet 2 - try: #...

Stop handler.postDelayed()

I call multiple Handlers by new Handler().postDelayed(new Runnable()..... How can I stop it when I click on back? public class MyActivity extends AppCompatActivity implements OnClickListener { private Button btn; private Handler handler; ...

Add borders to cells in POI generated Excel File

I am using POI to generate an Excel File. I need to add borders to specific cells in the worksheet. How can I accomplish this?...

What does EntityManager.flush do and why do I need to use it?

I have an EJB where I am saving an object to the database. In an example I have seen, once this data is saved (EntityManager.persist) there is a call to EntityManager.flush(); Why do I need to do this? The object I am saving is not attached and no...

How can you create multiple cursors in Visual Studio Code

What are the keyboard shortcuts for creating multiple cursors in VS Code?...

What is it exactly a BLOB in a DBMS context

What is it a BLOB? How can I use it? What are the differences between DBMS's BLOBs. I would like to save data using BLOBs into any DBMS and then read that BLOB with a library. ...

Python variables as keys to dict

Is there an easier way to do this in Python (2.7)?: Note: This isn't anything fancy, like putting all local variables into a dictionary. Just the ones I specify in a list. apple = 1 banana = 'f' carrot = 3 fruitdict = {} # I want to set the key equ...

How do I get the n-th level parent of an element in jQuery?

When I want to get, for example, the 3rd level parent of the element I must write $('#element').parent().parent().parent() Is there a more optimal method for this?...

How do I analyze a program's core dump file with GDB when it has command-line parameters?

My program operates like this: exe -p param1 -i param2 -o param3 It crashed and generated a core dump file, core.pid. I want to analyze the core dump file by gdb ./exe -p param1 -i param2 -o param3 core.pid But GDB recognizes the parameters of...

Java generics: multiple generic parameters?

I was wondering if it's possible to write a function that accepts multiple generic types as follows: public int void myfunction(Set<T> a, Set<T> b) { return 5; } Set<Integer> setA = new HashSet<Integer>(); Set<String&...

How do I list / export private keys from a keystore?

How do I list and export a private key from a keystore?...

Initial bytes incorrect after Java AES/CBC decryption

What's wrong with the following example? The problem is that the first part of the decrypted string is nonsense. However, the rest is fine, I get... Result: `£eB6O?geS??i are you? Have a nice day. @Test public void testEncrypt() { try { ...

What's the difference between __PRETTY_FUNCTION, FUNCTION, func__?

What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__, and where are they documented? How do I decide which one to use?...

How to copy a string of std::string type in C++?

I used the strcpy() function and it only works if I use C-string arrays like: char a[6] = "text"; char b[6] = "image"; strcpy(a,b); but whenever I use string a = "text"; string b = "image"; strcpy(a,b); I get...

Is it possible to create a temporary table in a View and drop it after select?

I need to alter one view and I want to introduce 2 temporary table before the SELECT. Is this possible? And how can I do it? ALTER VIEW myView AS SELECT * INTO #temporary1 SELECT * INTO #temporary2 SELECT * FROM #temporary1 UNION ALL SELECT * ...

How to open Atom editor from command line in OS X?

I have the Atom editor and was wondering how you can open a file or folder from the terminal in Atom. I am using a Mac. I am looking for a way to do this: atom . (opens folder) atom file.js (opens file) atom (opens editor) Is this possible and h...

Count items in a folder with PowerShell

I'm trying to write a very simple PowerShell script to give me the total number of items (both files and folders) in a given folder (c:\MyFolder). Here's what I've done: Write-Host ( Get-ChildItem c:\MyFolder ).Count; The problem is, that if I ha...

How to run a Command Prompt command with Visual Basic code?

I'm trying to code something in Visual Basic, more specifically Visual Studio 2010. I want, with a button click, my program to execute a command. Is that possible? ...

Finding first and last index of some value in a list in Python

Is there any built-in methods that are part of lists that would give me the first and last index of some value, like: verts.IndexOf(12.345) verts.LastIndexOf(12.345) ...

SDK location not found. Define location with sdk.dir in the local.properties file or with an ANDROID_HOME environment variable

I recently tried to import sample Android games I downloaded from Google's developer website. After importing them into Android Studio, I'm getting the following error: Error: SDK location not found. Define location with sdk.dir in the local.prop...

Change the Blank Cells to "NA"

Here's the link of my data. My target is to assign "NA" to all blank cells irrespective of categorical or numerical values. I am using na.strings="". But it's not assigning NA to all blank cells. ## reading the data dat <- read.csv("data2.csv")...

How to return HTTP 500 from ASP.NET Core RC2 Web Api?

Back in RC1, I would do this: [HttpPost] public IActionResult Post([FromBody]string something) { try{ // ... } catch(Exception e) { return new HttpStatusCodeResult((int)HttpStatusCode.InternalServerError); } ...

getActivity() returns null in Fragment function

I have a fragment (F1) with a public method like this public void asd() { if (getActivity() == null) { Log.d("yes","it is null"); } } and yes when I call it (from the Activity), it is null... FragmentTransaction t...

error : expected unqualified-id before return in c++

when I want to compile I get : Probléme : expected unqualified-id before "return" return 0; about last line : erreur:expexted declaration before { token I left the code unchanged just the middle part I changed... whats the problem??? here is my cod...

How do I call an Angular.js filter with multiple arguments?

As from the documentation, we can call a filter such as date like this: {{ myDateInScope | date: 'yyyy-MM-dd' }} Here date is a filter that takes one argument. What is the syntax to call filters with more parameters both from templates and from J...

Eclipse keyboard shortcut to indent source code to the left?

I've looked in the keyboard shortcuts list in Eclipse but can't find keyboard shortcut to indent source code to the left. Surely there is one?...