Examples On Programing Languages

Host binding and Host listening

How to use the host listener and host binding in angular 2? I tried like the below for host listener, but it's always showing a Declaration expected error. app.component.ts: import {Component, EventEmitter, HostListener, Directive} from 'angular2/co...

Installing Bootstrap 3 on Rails App

I'm trying to install Bootstrap 3.0 on my Rails app. I recently finished Michael Hartl's tutorial and am now trying to build my own system using this new version of Bootstrap, but I have a few questions that I'm not sure about. My system specs: OS...

How do I create a Linked List Data Structure in Java?

What's the best way to make a linked list in Java?...

Why is it bad style to `rescue Exception => e` in Ruby?

Ryan Davis’s Ruby QuickRef says (without explanation): Don’t rescue Exception. EVER. or I will stab you. Why not? What’s the right thing to do?...

get size of json object

i have a json object that gets returned by an AJAX request and I am having some trouble with the .length because it keeps returning undefined. Just wondering if I'm using it right: console.log(data.length); console.log(data.phones.length); They bo...

How do you detect Credit card type based on number?

I'm trying to figure out how to detect the type of credit card based purely on its number. Does anyone know of a definitive, reliable way to find this?...

How to unzip gz file using Python

I need to extract a gz file that I have downloaded from an FTP site to a local Windows file server. I have the variables set for the local path of the file, and I know it can be used by GZIP muddle. How can I do this? The file inside the GZ file is...

Add error bars to show standard deviation on a plot in R

For each X-value I calculated the average Y-value and the standard deviation (sd) of each Y-value x = 1:5 y = c(1.1, 1.5, 2.9, 3.8, 5.2) sd = c(0.1, 0.3, 0.2, 0.2, 0.4) plot (x, y) How can I use the standard deviation to add error bars to each ...

Golang read request body

I am writing my own logginMiddleware. Basically, I need to log body of the request and the response. The problem that I faced is that when I read body, it becomes empty and I cannot read it twice. I understand that it happens because it is of type R...

Is Secure.ANDROID_ID unique for each device?

I am using this call: Secure.getString(getApplicationContext().getContentResolver(), Secure.ANDROID_ID); To get a UID for the device. I think I am getting the same ID from multiple devices though. Should this be possible? The ID in question is: ...

Everytime I run gulp anything, I get a assertion error. - Task function must be specified

I'm trying to run the command below but unfortunately I run into errors. $ gulp build In my terminal and I get this assertion error. I've uninstalled node and NPM and reinstalled again using brew - How do I completely uninstall Node.js, and reins...

When should I use Async Controllers in ASP.NET MVC?

I have some concerns using async actions in ASP.NET MVC. When does it improve performance of my apps, and when does it not? Is it good to use async action everywhere in ASP.NET MVC? Regarding awaitable methods: shall I use async/await keywords when...

Converting strings to floats in a DataFrame

How to covert a DataFrame column containing strings and NaN values to floats. And there is another column whose values are strings and floats; how to convert this entire column to floats. ...

Can't connect to Postgresql on port 5432

I have PostgreSQL 9.3 installed on a server running Ubuntu Server 14.04. If I ssh into the server via terminal, I'm able to connect with psql. But when I try to configure pgAdmin III to do the remote connection, I get: Server doesn't listen The ...

What is difference between monolithic and micro kernel?

Could anyone please explain with examples difference between monolithic and micro kernel? Also other classifications of the kernel?...

How to access /storage/emulated/0/

I have written a code to record audio and save it to below file location. private String getFilename() { String filepath = Environment.getExternalStorageDirectory().getPath(); File file = new File(filepath, AUDIO_RECORDER_FOLDER); if (!f...

Searching word in vim?

I can search word in vim with /word. How can I search only for word, excluding searches for word1 and word2?...

Kill a Process by Looking up the Port being used by it from a .BAT

In Windows what can look for port 8080 and try to kill the process it is using through a .BAT file?...

How to create many labels and textboxes dynamically depending on the value of an integer variable?

Is there any way to dynamically create and display 'n' Labels with 'n' corresponding Textboxs when we know value of 'n' after for example, clicking "Display" button. Let me know if anything make you don't understand my question. Thank you! I am wor...

convert pfx format to p12

I need to export a .pfx format certificate (from windows mmc) to .p12 to use in another application. I cant find a way to do this. Can anyone suggest a method?...

What are the complexity guarantees of the standard containers?

Apparently ;-) the standard containers provide some form of guarantees. What type of guarantees and what exactly are the differences between the different types of container? Working from the SGI page (about STL) I have come up with this: Containe...

Java abstract interface

Consider an example (which compiles in java) public abstract interface Interface { public void interfacing(); public abstract boolean interfacing(boolean really); } Why is it necessary for an interface to be "declared" abstract? Is there o...

How do I redirect a user when a button is clicked?

I have a view with a button. When the user clicks the button I want them redirected to a data entry view. How do I accomplish this? I should mention the views are created, tested, and functioning. I can get to them by typing the url. I looked for st...

How to destroy a DOM element with jQuery?

Suppose the jQuery object is $target....

UTC Date/Time String to Timezone

How do I convert a date/time string (e.g. 2011-01-01 15:00:00) that is UTC to any given timezone php supports, such as America/New_York, or Europe/San_Marino....

Python | change text color in shell

I was wondering if anyone knows how to set the color of the text that shows up in the shell. I noticed the 'ls' uses a couple different colors when printing out information to the screen (on my Linux box), was wondering if I could take advantage of t...

Alter user defined type in SQL Server

I created few user defined types in my database as below CREATE TYPE [dbo].[StringID] FROM [nvarchar](20) NOT NULL and assigned them to various tables. The tables in my database are in various schemas (not only dbo) But I realized I need bigger fiel...

Visual Studio debugger error: Unable to start program Specified file cannot be found

I have a solution in C:\full path here\VS2010\blender.sln This solution contains many projects(around 100). When I compile them, they all work fine. I can run them without any problem, and (quite) everything works (there are some bugs). One of the p...

CSS I want a div to be on top of everything

How do I make an html div tag to be on top of everything? ...

Get Unix timestamp with C++

How do I get a uint unix timestamp in C++? I've googled a bit and it seems that most methods are looking for more convoluted ways to represent time. Can't I just get it as a uint?...

Add A Year To Today's Date

I am trying to add a year to todays date. I am working in a system that does not allow you to use standard JavaScript. For instance, to get todays date I have to use: javascript:now(); I have tried: javascript:now(+1); I have never seen this ...

Apache POI error loading XSSFWorkbook class

I'm trying to write a program that works with Excel docs, but the HSSF format is too small for my requirements. I'm attempting to move to XSSF, but I keep getting errors when trying to use it. I managed to solve the first two by adding xmlbeans-2.3....

Download file using libcurl in C/C++

I am building an application (on windows using Dev-C++) and I want it to download a file. I am doing this using libcurl (I have already installed the source code using packman). I found a working example (http://siddhantahuja.wordpress.com/2009/04/12...

How Can I Remove “public/index.php” in the URL Generated Laravel?

I need to remove index.php or public/index.php from the generated URL in Laravel; commonly path is localhost/public/index.php/someWordForRoute, It should be something like localhost/someWordForRoute. .htaccess <IfModule mod_rewrite.c> <If...

Error:java: invalid source release: 8 in Intellij. What does it mean?

Im trying to compile some code in I'm using Intellij Ultimate 13.1.4, but I get the following error and I have no idea what it means: Information:Using javac 1.7.0_55 to compile java sources Information:java: Errors occurred while compiling module '...

c# - approach for saving user settings in a WPF application?

What approach do you recommend for persisting user settings in a WPF windows (desktop) application? Note that the idea is that the user can change their settings at run time, and then can close down the application, then when starting up the applic...

Unsupported operation :not writeable python

Email validation #Email validator import re def is_email(): email=input("Enter your email") pattern = '[\.\w]{1,}[@]\w+[.]\w+' file = open('ValidEmails.txt','r') if re.match(pattern, email): file.write(email) I am wonderi...

How does lock work exactly?

I see that for using objects which are not thread safe we wrap the code with a lock like this: private static readonly Object obj = new Object(); lock (obj) { // thread unsafe code } So what happens when multiple threads access the same code ...

Diff files present in two different directories

I have two directories with the same list of files. I need to compare all the files present in both the directories using the diff command. Is there a simple command line option to do it, or do I have to write a shell script to get the file listing a...

Ternary operator in AngularJS templates

How do you do a ternary with AngularJS (in the templates)? It would be nice to use some in html attributes (classes and style) instead of creating and calling a function of the controller....

org.xml.sax.SAXParseException: Premature end of file for VALID XML

I am getting very strange "Premature end of file." exception for last few days on one of our servers. The same configuration XML works fine on another server. We are using Tomcat 5.0.28 on both these servers. This code has been working for ages (7+ y...

How do you clone a Git repository into a specific folder?

Executing the command git clone [email protected]:whatever creates a directory in my current folder named whatever, and drops the contents of the Git repository into that folder: /httpdocs/whatever/public My problem is that I need the contents of the...

C# loop - break vs. continue

In a C# (feel free to answer for other languages) loop, what's the difference between break and continue as a means to leave the structure of the loop, and go to the next iteration? Example: foreach (DataRow row in myTable.Rows) { if (someCondi...

How to write a simple Html.DropDownListFor()?

In ASP.NET MVC 2, I'd like to write a very simple dropdown list which gives static options. For example I'd like to provide choices between "Red", "Blue", and "Green"....

Array to Hash Ruby

Okay so here's the deal, I've been googling for ages to find a solution to this and while there are many out there, they don't seem to do the job I'm looking for. Basically I have an array structured like this ["item 1", "item 2", "item 3", "item ...

Can't start Tomcat as Windows Service

I am using Tomcat6 on Windows 8. I am able to start Tomcat via startup.bat without error. I've copied Tomcat6.exe, Tomcat6w.exe and service.bat under tomcat/bin directory and set the .exe files to run as administrator. I open command line with admi...

Difference Between Select and SelectMany

I've been searching the difference between Select and SelectMany but I haven't been able to find a suitable answer. I need to learn the difference when using LINQ To SQL but all I've found are standard array examples. Can someone provide a LINQ To ...

cannot call member function without object

This program has the user input name/age pairs and then outputs them, using a class. Here is the code. #include "std_lib_facilities.h" class Name_pairs { public: bool test(); void read_names(); void read_ages(); void pri...

Spring get current ApplicationContext

I am using Spring MVC for my web application. My beans are written in "spring-servlet.xml" file Now I have a class MyClass and i want to access this class using spring bean In the spring-servlet.xml i have written following <bean id="myClass" c...

In CSS how do you change font size of h1 and h2

In a word press twenty eleven theme. I want to change the size of headings When I wrap my headings around h1 and h2 tags as follows <h1>My h1 heading </h1> <h2> My h2 heading </h2> The font size of heading in the theme I ...

Is it better to use C void arguments "void foo(void)" or not "void foo()"?

What is better: void foo() or void foo(void)? With void it looks ugly and inconsistent, but I've been told that it is good. Is this true? Edit: I know some old compilers do weird things, but if I'm using just GCC, is void foo() Ok? Will foo(bar); th...

Remove duplicates from a list of objects based on property in Java 8

I am trying to remove duplicates from a List of objects based on some property. can we do it in a simple way using java 8 List<Employee> employee Can we remove duplicates from it based on id property of employee. I have seen posts removing ...

How do I create a crontab through a script

I need to add a cron job thru a script I run to set up a server. I am currently using Ubuntu. I can use crontab -e but that will open an editor to edit the current crontab. I want to do this programmatically. Is it possible to do so?...

Disable eslint rules for folder

Is there a way to disable specific rules for a folder? For example, I don't want to have required JSDoc comments for all my test files in the test folder. Is there a way to do this?...

Use Toast inside Fragment

I'm trying to show a Toast Message when user click on a Button inside a Fragment. The problem is I cannot access the activity to show the Toast on it. Here's the source of Fragment: public class FrgTimes extends Fragment { ScrollVie...

PHP preg replace only allow numbers

How can I modify this existing preg_replace to only allow numbers? function __cleanData($c) { return preg_replace("/[^A-Za-z0-9]/", "",$c); } ...

Randomize a List<T>

What is the best way to randomize the order of a generic list in C#? I've got a finite set of 75 numbers in a list I would like to assign a random order to, in order to draw them for a lottery type application....

How to receive JSON as an MVC 5 action method parameter

I have been trying the whole afternoon crawling through the web trying to receive a JSON object in the action controller. What is the correct and or easier way to go about doing it? I have tried the following: 1: //Post/ Roles/AddUser [HttpPost] p...

How can I compare two lists in python and return matches

I want to take two lists and find the values that appear in both. a = [1, 2, 3, 4, 5] b = [9, 8, 7, 6, 5] returnMatches(a, b) would return [5], for instance....

Saving awk output to variable

Can anyone help me out with this problem? I'm trying to save the awk output into a variable. variable = `ps -ef | grep "port 10 -" | grep -v "grep port 10 -"| awk '{printf "%s", $12}'` printf "$variable" EDIT: $12 corresponds to a parameter runni...

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...

Does Django scale?

I'm building a web application with Django. The reasons I chose Django were: I wanted to work with free/open-source tools. I like Python and feel it's a long-term language, whereas regarding Ruby I wasn't sure, and PHP seemed like a huge hassle to ...

Cannot push to GitHub - keeps saying need merge

I'm new to GitHub. Today I met some issue when I was trying to push my code to GitHub. Pushing to [email protected]:519ebayproject/519ebayproject.git To [email protected]:519ebayproject/519ebayproject.git ! [rejected] master -> master (non-fast...

JQUERY: Uncaught Error: Syntax error, unrecognized expression

console.log($('"#'+d+'"')); in html i have <div id="2013-10-23"> <h1>5</h1> <p>eeeeeeeeeeee</p> </div> It throws error: Uncaught Error: Syntax error, unrecognized expression: "#2013-10-23" In a...

AWS S3 copy files and folders between two buckets

I have been on the lookout for a tool to help me copy content of an AWS S3 bucket into a second AWS S3 bucket without downloading the content first to the local file system. I have tried to use the AWS S3 console copy option but that resulted in som...

Setting query string using Fetch GET request

I'm trying to use the new Fetch API: I am making a GET request like this: var request = new Request({ url: 'http://myapi.com/orders', method: 'GET' }); fetch(request); However, I'm unsure how to add a query string to the GET request. Ideally...

How can I replace every occurrence of a String in a file with PowerShell?

Using PowerShell, I want to replace all exact occurrences of [MYID] in a given file with MyValue. What is the easiest way to do so?...

Search for "does-not-contain" on a DataFrame in pandas

I've done some searching and can't figure out how to filter a dataframe by df["col"].str.contains(word), however I'm wondering if there is a way to do the reverse: filter a dataframe by that set's compliment. eg: to the effect of !(df["col"].str.cont...

Failed to open/create the internal network Vagrant on Windows10

I upgraded my Windows 10 to the last update yesterday and now, when I launch vagrant up command, I get this error : ==> default: Booting VM... ==> default: Waiting for machine to boot. This may take a few minutes... The guest machine entered ...

Spring data jpa- No bean named 'entityManagerFactory' is defined; Injection of autowired dependencies failed

I'm developing application using spring data jpa,hibernate,mysql,tomcat7,maven and it's create error.I'm trying to figure it out but i failed. error are Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; N...

Generating random whole numbers in JavaScript in a specific range?

How can I generate random whole numbers between two specified variables in JavaScript, e.g. x = 4 and y = 8 would output any of 4, 5, 6, 7, 8?...

Reading a string with scanf

I'm a little bit confused about something. I was under the impression that the correct way of reading a C string with scanf() went along the lines of (never mind the possible buffer overflow, it's just a simple example) char string[256]; scanf( "%s...

Select first occurring element after another element

I've got the following HTML code on a page: <h4>Some text</h4> <p> Some more text! </p> In my .css I've got the following selector to style the h4 element. The HTML code above is just a small part of the entire code; there ...

Angular expression if array contains

I'm trying to add a class to an element if a jobSet has not been selected for approval using expressions. <li class="approvalUnit" ng-repeat="jobSet in dashboard.currentWork" ng-class="{-1:'approved'}[selectedForApproval.indexOf(jobSet)]"> T...

Truncate (not round) decimal places in SQL Server

I'm trying to determine the best way to truncate or drop extra decimal places in SQL without rounding. For example: declare @value decimal(18,2) set @value = 123.456 This will automatically round @value to be 123.46, which is good in most cases....

How to resolve TypeError: can only concatenate str (not "int") to str

I decided to make some kind of secret code for testing purposes with Unicode. I've done that by adding numbers to Unicode so it would be kind of secret. I've been getting this error, but I don't know how to solve it. Is there any solution? Orig...

How to use the priority queue STL for objects?

class Person { public: int age; }; I want to store objects of the class Person in a priority queue. priority_queue< Person, vector<Person>, ??? > I think I need to define a class for the comparison thing, but I am not sure about ...

Why do python lists have pop() but not push()

Does anyone know why Python's list.append function is not called list.push given that there's already a list.pop that removes and returns the last element (that indexed at -1) and list.append semantic is consistent with that use?...

Get a list of dates between two dates

Using standard mysql functions is there a way to write a query that will return a list of days between two dates. eg given 2009-01-01 and 2009-01-13 it would return a one column table with the values: 2009-01-01 2009-01-02 2009-01-03 2009-01-...

How to Configure SSL for Amazon S3 bucket

I am using an Amazon S3 bucket for uploading and downloading of data using my .NET application. Now my question is: I want to access my S3 bucket using SSL. Is it possible to implement SSL for an Amazon s3 bucket?...

switch() statement usage

I am a little confused about the switch statement in R. Simply googling the function I get an example as follows: A common use of switch is to branch according to the character value of one of the arguments to a function. > centre <- functi...

UIWebView open links in Safari

I have a very simple UIWebView with content from my application bundle. I would like any links in the web view to open in Safari instead of in the web view. Is this possible?...

Permanently hide Navigation Bar in an activity

Is it possible to permanently remove the Navigation Bar on an activity? I want to remove the bar with the buttons that appear at the button of the screen on a tablet, not the Action Bar. Here. I know it is not recommended to do that, I did not make ...

How to check in Javascript if one element is contained within another

How can I check if one DOM element is a child of another DOM element? Are there any built in methods for this? For example, something like: if (element1.hasDescendant(element2)) or if (element2.hasParent(element1)) If not then any ideas how t...

Java Ordered Map

In Java, Is there an object that acts like a Map for storing and accessing key/value pairs, but can return an ordered list of keys and an ordered list of values, such that the key and value lists are in the same order? So as explanation-by-code, I'm...

Oracle SQL - REGEXP_LIKE contains characters other than a-z or A-Z

I would like to create a query where I select all records which contain characters that are not a-z or A-Z so something like this SELECT * FROM mytable WHERE REGEXP_LIKE(column_1, '![A-Z] [a-z]')...

CSS vertically align floating divs

I have a div (#wrapper) containing 2 divs standing side by side. I would like the right-div to be vertically aligned. I tried vertical-align:middle on my main wrapper but it is not working. It is driving me crazy! Hope someone can help. http://...

Capturing multiple line output into a Bash variable

I've got a script 'myscript' that outputs the following: abc def ghi in another script, I call: declare RESULT=$(./myscript) and $RESULT gets the value abc def ghi Is there a way to store the result either with the newlines, or with '\n' cha...

What is the simplest way to SSH using Python?

How can I simply SSH to a remote server from a local Python (3.0) script, supply a login/password, execute a command and print the output to the Python console? I would rather not use any large external library or install anything on the remote serv...

Running PowerShell as another user, and launching a script

I won't get into all the details of why I need this, but users must be able to launch PowerShell as a service account and when PowerShell loads it needs to run a script. I already can launch PowerShell with the stored credentials (stored as a secure ...

Using iFrames In ASP.NET

I have an asp.net website with a master-page, can I use the iframe so my .aspx pages will load inside the iframes. (Meaning it wont load the master-page) Kinda like my iframe will be the contentplaceholder or maybe the contentplaceholder will be ins...

PHP: date function to get month of the current date

I want to be able to figure out the month of the current date variable. I'm ex vb.net and the way to do it there is just date.Month. How do I do this in PHP? Thanks, Jonesy I used date_format($date, "m"); //01, 02..12 This is what I wanted, quest...

Using Java 8's Optional with Stream::flatMap

The new Java 8 stream framework and friends make for some very concise java code, but I have come across a seemingly-simple situation that is tricky to do concisely. Consider a List<Thing> things and method Optional<Other> resolve(Thing ...

how to remove the bold from a headline?

I have a headline: <h1>THIS IS A HEADLINE</h1> How do i make the phrase "THIS IS..." not to be bold and the rest without a change? couldn't find any relevent tag in text-decoration....

Convert JSON array to an HTML table in jQuery

Is there a really easy way I can take an array of JSON objects and turn it into an HTML table, excluding a few fields? Or am I going to have to do this manually?...

Running Facebook application on localhost

I am planning to connect to Facebook chat from my localhost. I will need to get the session key from Facebook. When I give the site URL as localhost:8080 or ip-address:8080 it does not work. I read about setting up two apps with 2 different API key...

I keep getting "Uncaught SyntaxError: Unexpected token o"

I'm trying to learn some html/css/javascript, so I'm writing myself a teaching project. The idea was to have some vocabulary contained in a json file which would then be loaded into a table. I managed to load the file in and print out one of its val...

How to resize array in C++?

I need to do the equivalent of the following C# code in C++ Array.Resize(ref A, A.Length - 1); How to achieve this in C++?...

Wavy shape with css

I'm trying to recreate this image with CSS: I would not need it to repeat. This is what I started but it just has a straight line: _x000D_ _x000D_ #wave {_x000D_ position: absolute;_x000D_ height: 70px;_x000D_ width: 600px;_x000D_ backgro...

Count work days between two dates

How can I calculate the number of work days between two dates in SQL Server? Monday to Friday and it must be T-SQL....

Spring - @Transactional - What happens in background?

I want to know what actually happens when you annotate a method with @Transactional? Of course, I know that Spring will wrap that method in a Transaction. But, I have the following doubts: I heard that Spring creates a proxy class? Can someone exp...

How can I exclude $(this) from a jQuery selector?

I have something like this: <div class="content"> <a href="#">A</a> </div> <div class="content"> <a href="#">B</a> </div> <div class="content"> <a href="#">C</a> </div&...

What is the most compatible way to install python modules on a Mac?

I'm starting to learn python and loving it. I work on a Mac mainly as well as Linux. I'm finding that on Linux (Ubuntu 9.04 mostly) when I install a python module using apt-get it works fine. I can import it with no trouble. On the Mac, I'm used to ...

Storing image in database directly or as base64 data?

The common method to store images in a database is to convert the image to base64 data before storing the data. This process will increase the size by 33%. Alternatively it is possible to directly store the image as a BLOB; for example: $image = new...

How to track down a "double free or corruption" error

When I run my (C++) program it crashes with this error. * glibc detected * ./load: double free or corruption (!prev): 0x0000000000c6ed50 *** How can I track down the error? I tried using print (std::cout) statements, without success. Could g...

Java 8 Stream and operation on arrays

I have just discovered the new Java 8 stream capabilities. Coming from Python, I was wondering if there was now a neat way to do operations on arrays like summing, multiplying two arrays in a "one line pythonic" way ? Thanks...

Is there an easy way to reload css without reloading the page?

I'm trying to make a live, in-page css editor with a preview function that would reload the stylesheet and apply it without needing to reload the page. What would be the best way to go about this?...

What strategies and tools are useful for finding memory leaks in .NET?

I wrote C++ for 10 years. I encountered memory problems, but they could be fixed with a reasonable amount of effort. For the last couple of years I've been writing C#. I find I still get lots of memory problems. They're difficult to diagnose and fix...

Create a button with rounded border

How would you make a FlatButton into a button with a rounded border? I have the rounded border shape using RoundedRectangleBorder but somehow need to color the border. new FlatButton( child: new Text("Button text), onPressed: null, shape: new ...

postgreSQL - psql \i : how to execute script in a given path

I'm new to postgreSQL and I have a simple question: I'm trying to create a simple script that creates a DB so I can later call it like this: psql -f createDB.sql I want the script to call other scripts (separate ones for creating tables, adding c...

How do I fix the npm UNMET PEER DEPENDENCY warning?

I'm on Windows 10, with Node 5.6.0 and npm 3.6.0. I'm trying to install angular-material and mdi into my working folder. npm install angular-material mdi errors with: +-- [email protected] +-- UNMET PEER DEPENDENCY angular-animate@^1.5.0 +-- UNMET PEE...

Textarea to resize based on content length

I need a textarea where I type my text in the box, it grows in length as needed to avoid having to deal with scroll bars and it need to shrink after delete text! I didn’t want to go down the mootools or jquery route because I have a lightweight for...

Couldn't connect to server 127.0.0.1:27017

I'm getting the following error: alex@alex-K43U:/$ mongo MongoDB shell version: 2.2.0 connecting to: test Thu Oct 11 11:46:53 Error: couldn't connect to server 127.0.0.1:27017 src/mongo/shell/mongo.js:91 exception: connect failed alex@alex-K43U:/$ ...

Saving image from PHP URL

I need to save an image from a PHP URL to my PC. Let's say I have a page, http://example.com/image.php, holding a single "flower" image, nothing else. How can I save this image from the URL with a new name (using PHP)?...

using lodash .groupBy. how to add your own keys for grouped output?

I have this sample data returned from an API. I'm using Lodash's _.groupBy to convert the data into an object I can use better. The raw data returned is this: [ { "name": "jim", "color": "blue", "age": "22" }, { ...

How to bring back "Browser mode" in IE11?

UPDATE: The old question applies only to IE11 preview; browser mode had returned in final release of IE11. But there is a catch: it is next to useless, because it does not emulate conditional comments. For example, if you use them to enable HTML5 sup...

Can I have a video with transparent background using HTML5 video tag?

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I have two projects: Parent project: A, Sub project: B A/pom.xml: <groupId>com.dummy.bla</groupId> <artifactId>parent</artifactId> <version>0.1-SNAPSHOT</version> <packaging>pom</packaging> And in B...

Send a base64 image in HTML email

Using a rich-text editor, our users can drag and drop a saved image from their desktop to the editor. The image appears and displays properly in the web page after they submit. Since the image is not uploaded anywhere, the editor saves the image as ...

JSON and XML comparison

I want to know which is faster: XML and JSON? When to use which one ?...

How do I install a module globally using npm?

I recently installed Node.js and npm module on OSX and have a problem with the settings I think: npm install [MODULE] is not installing the node.js module to the default path which is /usr/local/lib/node_modules. ...

scale Image in an UIButton to AspectFit?

I want to add an image to a UIButton, and also want to scale my image to fit with the UIButton (make image smaller). Please show me how to do it. This is what I have tried, but it does't work: Adding image to button and using setContentMode: [...

How to prevent form resubmission when page is refreshed (F5 / CTRL+R)

I have a simple form that submits text to my SQL table. The problem is that after the user submits the text, they can refresh the page and the data gets submitted again without filling the form again. I could redirect the user to another page after t...

Using Git with Visual Studio

As a long-time Visual SourceSafe user (and hater) I was discussing switching to SVN with a colleague; he suggested using Git instead. Since, apparently, it can be used as peer-to-peer without a central server (we are a 3-developer team). I have not...

Python: BeautifulSoup - get an attribute value based on the name attribute

I want to print an attribute value based on its name, take for example <META NAME="City" content="Austin"> I want to do something like this soup = BeautifulSoup(f) //f is some HTML containing the above meta tag for meta_tag in soup('meta'):...

Jupyter notebook not running code. Stuck on In [*]

My code was running fine before I did not change anything and I ran it again. Now it doesn't return anything not even an error. It is just stuck on "In [*]". ...

Set up git to pull and push all branches

I'd like to push and pull all the branches by default, including the newly created ones. Is there a setting that I can define for it? Otherwise, when I add a new branch, locally and I want to pull it from the server, what is the simplest way to do ...

Synchronously waiting for an async operation, and why does Wait() freeze the program here

Preface: I'm looking for an explanation, not just a solution. I already know the solution. Despite having spent several days studying MSDN articles about the Task-based Asynchronous Pattern (TAP), async and await, I'm still a bit confused about some...

Simulator or Emulator? What is the difference?

While I understand what simulation and emulation mean in general, I almost always get confused about them. Assume that I create a piece of software that mimics existing hardware/software, what should I call it? A simulator or an emulator? Could anyo...

angular 2 sort and filter

In Angularjs 1 it is possible to sort and filter the following way: <ul ng-repeat="friend in friends | filter:query | orderBy: 'name' "> <li>{{friend.name}}</li> </ul> But I could not find any examples of how to do this ...

Error C1083: Cannot open include file: 'stdafx.h'

When I compiled this program (from C++ Programming Language 4th edition): main.cpp #include <stdafx.h> #include <iostream> #include <cmath> #include "vector.h" using namespace std; double sqrt_sum(vector&); int _tmain(int ar...

How to install XNA game studio on Visual Studio 2012?

Is it possible to create XNA games using Visual Studio 2012?...

Try reinstalling `node-sass` on node 0.12?

I would like to use google web starter kit. I installed node.js v0.12.0, node-sass & gulp. And then ran: $ sudo npm install When I typed gulp serve then got this error: Using gulpfile ~/web-starter-kit/gulpfile.js Starting 'styles'... 'style...

What is the difference between children and childNodes in JavaScript?

I have found myself using JavaScript and I ran across childNodes and children properties. I am wondering what the difference between them is. Also is one preferred to the other?...

What is a callback URL in relation to an API?

I've been scouring the net, and can't seem to wrap my head around the idea of a callback URL. In my case I have a few callback URLs that I have to define myself. A popular one is a "default callback URL". What is this exactly? Can you give an example...

HTML5 Video not working in IE 11

I have a video archive that I have working in everything except IE 11. I get the error "Error: Unsupported video type or invalid file path" when loaded in IE 11. Below is the HTML I am using. <video id="movie" width="640" height="400" autobuffer ...

Git Bash is extremely slow on Windows 7 x64

I've been using Git on both Windows and Ubuntu during the development of a small project, frequently flipping back and forth between the two. The issue is that Git Bash consistently becomes slow. When I say slow, I mean that running cd takes anywher...

How can I quickly sum all numbers in a file?

I have a file which contains several thousand numbers, each on it's own line: 34 42 11 6 2 99 ... I'm looking to write a script which will print the sum of all numbers in the file. I've got a solution, but it's not very efficient. (It takes severa...

What does "for" attribute do in HTML <label> tag?

I wonder what is the difference between the following two code snippets: <label>Input here : </label> <input type='text' name='theinput' id='theinput'/> and <label for='theinput'>Input here : </label> <input type='te...

How to view the contents of an Android APK file?

Is there a way to extract and view the content of an .apk file?...

Response.Redirect with POST instead of Get?

We have the requirement to take a form submission and save some data, then redirect the user to a page offsite, but in redirecting, we need to "submit" a form with POST, not GET. I was hoping there was an easy way to accomplish this, but I'm startin...

Lombok added but getters and setters not recognized in Intellij IDEA

I am using IntelliJ IDEA on ubuntu. I added lombok.jar into my project and installed the Lombok plugin for IDEA. I have access to the annotations but the getters and setters aren't generated. I get the same errors I would get if I tried accessing a g...

Disable all gcc warnings

I'm working on a project that will read compiler error messages of a particular variety and do useful things with them. The sample codebase I'm testing this on (a random open-source application), and hence rebuilding frequently, contains a few bits t...

Automated way to convert XML files to SQL database?

We have a bunch of XML files, following a schema which is essentially a serialised database form: <table1> <column1>value</column1> <column2>value</column2> </table1> <table1> <column1>another...

What is the python keyword "with" used for?

What is the python keyword "with" used for? Example from: http://docs.python.org/tutorial/inputoutput.html >>> with open('/tmp/workfile', 'r') as f: ... read_data = f.read() >>> f.closed True ...

Round a double to 2 decimal places

If the value is 200.3456, it should be formatted to 200.34. If it is 200, then it should be 200.00....

Reading From A Text File - Batch

I have a text file, a.txt: Hello World Good Afternoon I have written a batch script to read contents of this file line by line: FOR /F "tokens=* delims=" %%x in (a.txt) DO echo %%x I am getting output as "Hello" "World" due to default beh...

Looping through all the properties of object php

How can I loop through all the properties of object?. Right now I have to write a new code line to print each property of object echo $obj->name; echo $obj->age; Can I loop through all the properties of an object using foreach loop or any lo...

Hibernate Error: a different object with the same identifier value was already associated with the session

I essentially have some objects in this configuration (the real data model is a bit more complex): A has a many-to-many relationship with B. (B has inverse="true") B has a many-to-one relationship with C. (I have cascade set to "save-update") C is ...

How to replace local branch with remote branch entirely in Git?

I have two branches: local branch (the one which I work with) remote branch (public, only well-tested commits go there) Recently I seriously messed up my local branch. How would I replace the local branch entirely with the remote one, so I can c...

get list of pandas dataframe columns based on data type

If I have a dataframe with the following columns: 1. NAME object 2. On_Time object 3. On_Budget object 4. %actual_hr ...

Change a branch name in a Git repo

How do I rename an existing branch in a Git repo? I want the current branch to have a new name....

How do I store the select column in a variable?

How do I store the select column in a variable? I tried this, but it throws me an error "Incorrect syntax": declare @EmpId int SELECT dbo.Employee.Id as @EmpId FROM dbo.Employee ...

Is it possible to iterate through JSONArray?

Possible Duplicates: JSON Array iteration in Android/Java JSONArray with Java Is it possible to iterate through JSONArray object using Iterator?...

Powershell folder size of folders without listing Subdirectories

I have found several resources that use the following script to get folder sizes $colItems = (Get-ChildItem $startFolder -recurse | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object) foreach ($i in $colItems) { $subFolderItems = (G...

How can I add an image file into json object?

I want to add an image file into json object . Is it possible to add image file into json object? I tried below code but its not working ? Because i want to send that json object to the server then server will read my image file and store into that ...