Examples On Programing Languages

Converting NSString to NSDate (and back again)

How would I convert an NSString like "01/02/10" (meaning 1st February 2010) into an NSDate? And how could I turn the NSDate back into a string?...

ASP.net vs PHP (What to choose)

I have been assigned a task to develop a new web application. Its a kind of social web applications, for the sake of understanding you can say its similar to facebook. Now before start developing such huge application i have few questions to ask: F...

R dplyr: Drop multiple columns

I have a dataframe and list of columns in that dataframe that I'd like to drop. Let's use the iris dataset as an example. I'd like to drop Sepal.Length and Sepal.Width and use only the remaining columns. How do I do this using select or select_ from ...

Setting state on componentDidMount()

I know that it is an anti-pattern to set state on componentDidMount and a state should be set on componentWillMount but suppose I want to set the length of the number of li tags as a state. In that case, I can't set the state on componentWillMount si...

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...

Importing text file into excel sheet

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...

Specifying row names when reading in a file

I have a .txt file that contains row names. However, R set the row names as the first column....

Compare two date formats in javascript/jquery

I have the following : var fit_start_time = $("#fit_start_time").val(); //2013-09-5 var fit_end_time = $("#fit_end_time").val(); //2013-09-10 if(Date.parse(fit_start_time)>=Date.parse(fit_end_time)){ alert("Please select a different End...

MySQL check if a table exists without throwing an exception

What is the best way to check if a table exists in MySQL (preferably via PDO in PHP) without throwing an exception. I do not feel like parsing the results of "SHOW TABLES LIKE" et cetera. There must be some sort of boolean query?...

How to write character & in android strings.xml

I wrote the following in the strings.xml file: <string name="game_settings_dragNDropMove_checkBox">Move by Drag&Drop</string> I got the following error: The reference to entity "Drop" must end with the ';' delimiter. How can I w...

Ng-model does not update controller value

Probably silly question, but I have my html form with simple input and button: <input type="text" ng-model="searchText" /> <button ng-click="check()">Check!</button> {{ searchText }} Then in the controller (template and controlle...

Angular.js How to change an elements css class on click and to remove all others

i'm trying to make my two elements toggle, so if one element is clicked it will remove all references of my-class and apply it to its self. Any ideas? <span id="1" ng-style="my-class" ng-click="tog=my-class"></span> <span id="2" ng-s...

Set selected option of select box

I want to set a option that was selected previously to be displayed on page load. I tried it with the following code: $("#gate").val('Gateway 2'); with <select id="gate"> <option value='null'>- choose -</option> <opti...

Mock MVC - Add Request Parameter to test

I am using spring 3.2 mock mvc to test my controller.My code is @Autowired private Client client; @RequestMapping(value = "/user", method = RequestMethod.GET) public String initUserSearchForm(ModelMap modelMap) { User...

Scale an equation to fit exact page width

I have an equation that is only a tiny bit too wide for one line. I'd really like to avoid having the equation number on the next line. How do you achieve this? Currently I'm using \small, but this is overkill. Please note. I have tried scalebox and...

aspx page to redirect to a new page

What is the code required to redirect the browser to a new page with an ASPX page? I have tried this on my page default.aspx : <% Response.Redirect("new.aspx", true); %> or <%@ Response.Redirect("new.aspx", true); %> And these resu...

PHPUnit assert that an exception was thrown?

Does anyone know whether there is an assert or something like that which can test whether an exception was thrown in the code being tested?...

How to create PDF files in Python

I'm working on a project which takes some images from user and then creates a PDF file which contains all of these images. Is there any way or any tool to do this in Python? E.g. to create a PDF file (or eps, ps) from image1 + image 2 + image 3 -> P...

How to use delimiter for csv in python

I'm having trouble with figuring out how to use the delimiter for csv.writer in Python. I have a csv file in which the strings separated by commas are in single cell and I need to have each word in each individual cell. For ex: 100 , 2559 ,,Mai...

jquery: $(window).scrollTop() but no $(window).scrollBottom()

I want to place an element to the bottom of the page whenever the user scrolls the page. It's like "fixed position" but I can't use "position: fixed" css as many of my clients' browser can't support that. I noticed jquery can get current viewport's ...

What is a thread exit code?

What exactly is a thread exit code in the Output window while debugging? What information it gives me? Is it somehow useful or just an internal stuff which should not bother me? The thread 0x552c has exited with code 259 (0x103). The thread 0x4440 h...

How to use "/" (directory separator) in both Linux and Windows in Python?

I have written a code in python which uses / to make a particular file in a folder, if I want to use the code in windows it will not work, is there a way by which I can use the code in Windows and Linux. In python I am using this code: pathfile=os....

What is the difference between git pull and git fetch + git rebase?

Another question says that git pull is like a git fetch + git merge. But what is the difference between git pull and git fetch + git rebase?...

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) ...

what does "error : a nonstatic member reference must be relative to a specific object" mean?

int CPMSifDlg::EncodeAndSend(char *firstName, char *lastName, char *roomNumber, char *userId, char *userFirstName, char *userLastName) { ... return 1; } extern "C" { __declspec(dllexport) int start(char *firstName, char *lastName, char ...

What are all the different ways to create an object in Java?

Had a conversation with a coworker the other day about this. There's the obvious using a constructor, but what are the other ways there?...

Printing PDFs from Windows Command Line

I'm trying to print all pdfs in current dir. When I call this bash script in cmd (singlepdf.sh): '"C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe"' /t Gemeinde_348_BioID_842_alt.pdf everything's working fine. When calling multiplepdfs...

Removing MySQL 5.7 Completely

I am trying to uninstall mysql from my ubuntu 12.04 completely. But not able to. I tried a lot of commands. But nothing is working. Can anyone help out here! sudo apt-get remove mysql-server mysql-client mysql-common sudo apt-get autoremove I am ...

How does one target IE7 and IE8 with valid CSS?

I want to target IE7 and IE8 with W3C-compliant CSS. Sometimes fixing CSS for one version does not fix for the other. How can I achieve this?...

how to generate a unique token which expires after 24 hours?

I have a WCF Webservice which checks if the user is valid. If the user is valid I want to generate a token which expires after 24 hours. public bool authenticateUserManual(string userName, string password,string language,string token) { if (Me...

How to store custom objects in NSUserDefaults

Alright, so I've been doing some poking around, and I realize my problem, but I don't know how to fix it. I have made a custom class to hold some data. I make objects for this class, and I need to them to last between sessions. Before I was puttin...

How to add Action bar options menu in Android Fragments

I am trying to have a options menu in Android Fragments. ActionBar options menu are not displaying in my Fragments. Here is my code and I have both onCreateOptionsMenu() and onOptionSelected() function. My code doesn't shows any error. But options m...

Chrome Extension: Make it run every page load

I want to make a chrome extension that executes some scripts after one page is loaded, I am not sure whether I have to implement this logic on the background page or it can be anywhere else, any help here will be greatly appreciated....

Using comma as list separator with AngularJS

I need to create a comma-separated list of items: <li ng-repeat="friend in friends"> <b ng-repeat="email in friend.email">{{email}}{{$last ? '' : ', '}}</b>... </li> According to the AngularJS documentation, no co...

CSS "and" and "or"

I've got quite big trouble, because i need to anathematise from styling some input types. I had something like: .registration_form_right input:not([type="radio") { //Nah. } But i don't want to style checkboxes too. I've tried: .registration_for...

Gradle: Could not determine java version from '11.0.2'

I ran the following comment: ./gradlew app:installDebug only to be met with the log: FAILURE: Build failed with an exception. * What went wrong: Could not determine java version from '11.0.2'. * Try: Run with --stacktrace option to get the sta...

How to remove unused imports in Intellij IDEA on commit?

Is there a way to remove unused imports in Intellij IDEA on commit? It is not very optimal to do it manually, CTRL + ALT + O helps but it's still manual....

Deck of cards JAVA

I have created my deck of cards that deals every card and a suit until there is no card remaining. For my project, I need to split it up into 3 classes which includes a driver class. I first created one class with everything so I knew how to make it ...

Spring Boot without the web server

I have a simple Spring Boot application that gets messages from a JMS queue and saves some data to a log file, but does not need a web server. Is there any way of starting Spring Boot without the web server?...

Convert timedelta to total seconds

I have a time difference import time import datetime time1 = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())) ... time2 = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())) diff = time2 - time1 Now, how do I find the total numbe...

What ports need to be open for TortoiseSVN to authenticate (clear text) and commit?

What ports need to be open for TortoiseSVN to authenticate (basic) in order to commit? I know it is not a good thing, but I believe username and password are in the clear right now. Let me describe as much as I know about set-up, and what seems to b...

Convert np.array of type float64 to type uint8 scaling values

I have a particular np.array data which represents a particular grayscale image. I need to use SimpleBlobDetector() that unfortunately only accepts 8bit images, so I need to convert this image, obviously having a quality-loss. I've already tried: i...

Replacing column values in a pandas DataFrame

I'm trying to replace the values in one column of a dataframe. The column ('female') only contains the values 'female' and 'male'. I have tried the following: w['female']['female']='1' w['female']['male']='0' But receive the exact same copy of ...

Android. Fragment getActivity() sometimes returns null

In developer console error reports sometimes I see reports with NPE issue. I do not understand what is wrong with my code. On emulator and my device application works good without forcecloses, however some users get NullPointerException in fragment ...

Export table data from one SQL Server to another

I have two SQL Servers (both 2005 version). I want to migrate several tables from one to another. I have tried: On source server I have right clicked on the database, selected Tasks/Generate scripts. The problem is that under Table/View options t...

GROUP BY and COUNT in PostgreSQL

The query: SELECT COUNT(*) as count_all, posts.id as post_id FROM posts INNER JOIN votes ON votes.post_id = posts.id GROUP BY posts.id; Returns n records in Postgresql: count_all | post_id -----------+--------- 1 | 6 3 ...

Caching a jquery ajax response in javascript/browser

I would like to enable caching of an ajax response in javascript/browser. From the jquery.ajax docs: By default, requests are always issued, but the browser may serve results out of its cache. To disallow use of the cached results, set cache...

Difference between two dates in years, months, days in JavaScript

I've been searching for 4 hours now, and have not found a solution to get the difference between two dates in years, months, and days in JavaScript, like: 10th of April 2010 was 3 years, x month and y days ago. There are lots of solutions, but they ...

Formatting a number with leading zeros in PHP

I have a variable which contains the value 1234567. I would like it to contain exactly 8 digits, i.e. 01234567. Is there a PHP function for that?...

Function to Calculate a CRC16 Checksum

I'm working on a library to provide simple reliable communication over an RS232 or RS485 connection. Part of this code involves using a CRC16 checksum on the data to detect corruption from line noise. I've created a function to calculate a CRC16 ch...

Check if a key exists inside a json object

amt: "10.00" email: "[email protected]" merchant_id: "sam" mobileNo: "9874563210" orderID: "123456" passkey: "1234" The above is the JSON object I'm dealing with. I want to check if the 'merchant_id' key exists. I tried the below code, but it's not wor...

How do you Programmatically Download a Webpage in Java

I would like to be able to fetch a web page's html and save it to a String, so I can do some processing on it. Also, how could I handle various types of compression. How would I go about doing that using Java?...

ERROR 1064 (42000): You have an error in your SQL syntax; Want to configure a password as root being the user

I have just downloaded WAMP. I want to configure a password for the MySQL root user using MySQL console. No password has been set previously. The following is the input mysql-> use mysql Database changed mysql-> UPDATE user ...

Making a UITableView scroll when text field is selected

After a lot of trial and error, I'm giving up and asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right. I have a UITableView which is composed of custom cells. The cells are made of 5 text ...

How to get the hostname of the docker host from inside a docker container on that host without env vars

What are the ways get the docker host's hostname from inside a container running on that host besides using environment variables? I know I can pass the hostname as an environment variable to the container at container creation time. I'm wondering ho...

Retrieve Button value with jQuery

A simple one, I'm trying to retrieve the value attribute of a button when its been pressed using jQuery, here's what I have: <script type="text/javascript"> $(document).ready(function() { $('.my_button').click(function() { ...

Stretch background image css?

<td class="style1" align='center' height='35'> <div style='overflow: hidden; width: 230px;'> <a class='link' herf='' onclick='topic(<?=$key;?>)'> <span id='name<?=$key;?>'><?=$name;?></span>...

How to get a complete list of ticker symbols from Yahoo Finance?

I've googled endlessly for a method of getting a complete (and daily updated) list of all Yahoo ticker symbols available through http://finance.yahoo.com Yahoo has information for stocks, futures etc for a lot of exchanges worldwide, and I'd like a ...

How do I prevent a form from being resized by the user?

I have a form that needs to be maximized in VB.net. I don't want the user to be able to change its size or move it around. How can I do this?...

C# IPAddress from string

I need to define the IP address in the class System.Net.IPAddress but the method: IPAddress ipaddress = IPAddress.Parse("127.0.0.1"); //127.0.0.1 as an example doesn't work, is there another method? How can I define the IP address?...

How to PUT a json object with an array using curl

I have a series of data to enter into database. The user interface to enter the data isn't good for bulk entry, so I'm trying to formulate a command line equivalent. When I examine the network request of the UI in chrome, I see a PUT request of a j...

How to fix UITableView separator on iOS 7?

UITableView draws with ragged lines on iOS 7: How to fix it? The line between cells should be on the full width of the screen....

Can you force Visual Studio to always run as an Administrator in Windows 8?

In Windows 7, you could go into a programs compatibility settings and check off to always run as an Administrator. Is there a similar option in Windows 8? I've always disabled UAC on my machines, and did the same after my Windows 8 upgrade, or so I...

Hibernate Auto Increment ID

I have a j2ee application using hibernate with annotation. How do I annotate the Id field in my pojo class to set it as auto increment or auto generated. and in adding the bean do I leave that field in my bean null?...

Using IS NULL or IS NOT NULL on join conditions - Theory question

Theory question here: Why does specifying table.field IS NULL or table.field IS NOT NULL not work on a join condition (left or right join for instance) but only in the where condition? Non working Example: -this should return all shipments with an...

Common sources of unterminated string literal

I am trying to debug a JavaScript script that gets read in a Firefox extension and executed. I only can see errors via the Firebug console (my code is invisible to Firebug), and it's reporting a "unterminated string literal." I checked the line and...

Concat scripts in order with Gulp

Say, for example, you are building a project on Backbone or whatever and you need to load scripts in a certain order, e.g. underscore.js needs to be loaded before backbone.js. How do I get it to concat the scripts so that they’re in order? // JS...

How to dynamically create columns in datatable and assign values to it?

I will have to create columns in datatable during runtime and assign values to it. How can i do it in vb.net. Any sample please......

Access nested dictionary items via a list of keys?

I have a complex dictionary structure which I would like to access via a list of keys to address the correct item. dataDict = { "a":{ "r": 1, "s": 2, "t": 3 }, "b":{ "u": 1, "v": { ...

Remote Procedure call failed with sql server 2008 R2

I am working with SQL Server 2008 R2. I am unable to connect to my database remotely. I got the following error. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or w...

force browsers to get latest js and css files in asp.net application

Some browsers cache js and css files, failing to refresh them unless you force them to. What's the easiest way. I just implemented this solution that seems to work. Declare a version variable on your page public string version { get; set; } ...

Why am I getting this error Premature end of file?

I am trying to parse an XML response, but I am failing miserably. I thought initially that the xml was just not being returned in the response, so I crafted up the code below with a direct link to my xml file online. I am able to print the XML to sc...

How does the bitwise complement operator (~ tilde) work?

Why is it that ~2 is equal to -3? How does ~ operator work?...

Is there an alternative to string.Replace that is case-insensitive?

I need to search a string and replace all occurrences of %FirstName% and %PolicyAmount% with a value pulled from a database. The problem is the capitalization of FirstName varies. That prevents me from using the String.Replace() method. I've seen web...

How to check if object has any properties in JavaScript?

Assuming I declare var ad = {}; How can I check whether this object will contain any user-defined properties?...

User Control - Custom Properties

I have developed a User Control in Visual Studio (WinForms C#) and have a question. I need the user of my User Control to be able to change certain string values and I would like them to be able to add the user control to their Form and click on it ...

Find and replace entire mysql database

i would like to do a find and replace inside an entire database not just a table. How can i alter the script below to work? update [table_name] set [field_name] = replace([field_name],'[string_to_find]','[string_to_replace]'); Do i just use an a...

ExecuteReader: Connection property has not been initialized

ExecuteReader: Connection property has not been initialized. my coding is protected void Button2_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection("Data Source=Si-6\\SQLSERVER2005;Initial Catalog=rags;Inte...

How do I add an integer value with javascript (jquery) to a value that's returning a string?

I have a simple html block like: <span id="replies">8</span> Using jquery I'm trying to add a 1 to the value (8). var currentValue = $("#replies").text(); var newValue = currentValue + 1; $("replies").text(newValue); What's happenin...

Django - what is the difference between render(), render_to_response() and direct_to_template()?

Whats the difference (in language a python/django noob can understand) in a view between render(), render_to_response() and direct_to_template()? e.g. from Nathan Borror's basic apps examples def comment_edit(request, object_id, template_name='comm...

How do you add an ActionListener onto a JButton in Java

private JButton jBtnDrawCircle = new JButton("Circle"); private JButton jBtnDrawSquare = new JButton("Square"); private JButton jBtnDrawTriangle = new JButton("Triangle"); private JButton jBtnSelection = new JButton("Selection"); How do I add actio...

Nth word in a string variable

In Bash, I want to get the Nth word of a string hold by a variable. For instance: STRING="one two three four" N=3 Result: "three" What Bash command/script could do this?...

How to count the number of set bits in a 32-bit integer?

8 bits representing the number 7 look like this: 00000111 Three bits are set. What are algorithms to determine the number of set bits in a 32-bit integer?...

ByRef argument type mismatch in Excel VBA

I'm working with VBA. I wrote a user define function that takes a string, process it and return a cleaned string. I am not sure what is wrong with it. I am not able to call it and ask it to process my string and return it. I am thinking there are a m...

How to git reset --hard a subdirectory?

UPDATE²: With Git 2.23 (August 2019), there's a new command git restore that does this, see the accepted answer. UPDATE: This will work more intuitively as of Git 1.8.3, see my own answer. Imagine the following use case: I want to get rid ...

Use jQuery to change an HTML tag?

Is this possible? example: $('a.change').click(function(){ //code to change p tag to h5 tag }); <p>Hello!</p> <a id="change">change</a> So clicking the change anchor should cause the <p>Hello!</p> section to ...

How to build PDF file from binary string returned from a web-service using javascript

I am trying to build a PDF file out of a binary stream which I receive as a response from an Ajax request. Via XmlHttpRequest I receive the following data: %PDF-1.4.... ..... ....hole data representing the file .... %% EOF What I tried so far was...

Disabling swap files creation in vim

Is there a way to disable .swp files creation in vim? or at least create them all in one place so I can find and delete them easily. I find them especially annoying when I copy the parent directory while editing at the same time. Of course I know th...

How to check if a string contains text from an array of substrings in JavaScript?

Pretty straight forward. In javascript, I need to check if a string contains any substrings held in an array....

accessing a docker container from another container

i created two docker containers based on two different images. one of db and another for webserver. both containers are running on my mac osx. i can access db container from host machine and same way can access webserver from host machine. howeve...

Brew doctor says: "Warning: /usr/local/include isn't writable."

Brew doctor says: Warning: /usr/local/include isn't writable. This can happen if you "sudo make install" software that isn't managed by Homebrew. If a brew tries to write a header file to this directory, the install will fail during the l...

How to create friendly URL in php?

Normally, the practice or very old way of displaying some profile page is like this: www.domain.com/profile.php?u=12345 where u=12345 is the user id. In recent years, I found some website with very nice urls like: www.domain.com/profile/12345 ...

Convert JSON format to CSV format for MS Excel

I received a JSON file but don't know how to read it. Is there a converter where I can produce a nice CSV file so it can be loaded into MS Excel? I don't understand JSON, so it would be awesome if someone wrote a script or link me to one that would d...

ORA-12505: TNS:listener does not currently know of SID given in connect descriptor (DBD ERROR: OCIServerAttach)

I created a Windows 2003 R2 Virtual Machine running on VirtualBox and I installed Oracle (10201_database_win32). I assigned a static IP on the Virtual Ethernet too. Everything worked great right after installation. I listed(lsnrctl services) the ...

How to send JSON instead of a query string with $.ajax?

Can someone explain in an easy way how to make jQuery send actual JSON instead of a query string? $.ajax({ url : url, dataType : 'json', // I was pretty sure this would do the trick data : data, type : 'POST', comple...

How to copy multiple files in one layer using a Dockerfile?

The following Dockerfile contains four COPY layers: COPY README.md ./ COPY package.json ./ COPY gulpfile.js ./ COPY __BUILD_NUMBER ./ How to copy these files using one layer instead? The following was tried: COPY [ "__BUILD_NUMBER ./", "R...

Javascript window.print() in chrome, closing new window or tab instead of cancelling print leaves javascript blocked in parent window

In the application I work on, we have several different places a user can print from. In all these cases we are using the same workflow of opening a new window(or tab), writing whatever we need to print to the document of the new window, and then we...

CRON command to run URL address every 5 minutes

I'm newbie in cron commands and I need help. I have a script on http://example.com/check/. Whats is command for cron to run this URL every 5 minutes? I tried */5 * * * * /home/test/check.php But I want to run URL not relative script addres...

How can I INSERT data into two tables simultaneously in SQL Server?

Let's say my table structure looks something like this: CREATE TABLE [dbo].[table1] ( [id] [int] IDENTITY(1,1) NOT NULL, [data] [varchar](255) NOT NULL, CONSTRAINT [PK_table1] PRIMARY KEY CLUSTERED ([id] ASC) ) CREATE TABLE [dbo].[table...

Difference between Running and Starting a Docker container

In practice to start a container I do: docker run a8asd8f9asdf0 If thats the case, what does: docker start do? In the manual it says Start one or more stopped containers ...

How to make a radio button unchecked by clicking it?

Unlike check boxes, it is impossible for the user to deselect radio buttons once they are clicked. Is there any way so that they can be toggled programmatically using Javascript? This would be preferably without using jQuery....

Arrays in type script

I am finding difficulty declaring array in typescript and accessing it. below is the code working for me class Book { public BookId: number; public Title: string; public Author: string; public Price: number; public Description: ...

How can I suppress the newline after a print statement?

I read that to suppress the newline after a print statement you can put a comma after the text. The example here looks like Python 2. How can it be done in Python 3? For example: for item in [1,2,3,4]: print(item, " ") What needs to change so...

Inserting a Python datetime.datetime object into MySQL

I have a date column in a MySQL table. I want to insert a datetime.datetime() object into this column. What should I be using in the execute statement? I have tried: now = datetime.datetime(2009,5,5) cursor.execute("INSERT INTO table (name, id, da...

How to commit a change with both "message" and "description" from the command line?

I'm new to both git and GitHub. I managed to set up everything locally on my Mac, so that now I can push commits to GitHub via git (on the command line, not the Mac app). When I push commits directly from the GitHub web interface (e.g. quickly fixin...

sizing div based on window width

I have kind of a weird question. On my page I have a main image of a planet in some heavy duty nebula. I have it set up so the min width is 1000px and max is 1500px. I have the sides fading out and this looks great with larger screens. What I'd like...

Find files containing a given text

In bash I want to return file name (and the path to the file) for every file of type .php|.html|.js containing the case-insensitive string "document.cookie" | "setcookie" How would I do that?...

How to remove all numbers from string?

I'd like to remove all numbers from a string [0-9]. I wrote this code that is working: $words = preg_replace('/0/', '', $words ); // remove numbers $words = preg_replace('/1/', '', $words ); // remove numbers $words = preg_replace('/2/', '', $words ...

MySQL CURRENT_TIMESTAMP on create and on update

I want to define table which will have 2 TIMESTAMP fields, someting like this: CREATE TABLE `msgs` ( `id` INT PRIMARY KEY AUTO_INCREMENT, `msg` VARCHAR(256), `ts_create` TIMESTAMP DEFAULT CURRENT_TIMESTAMP, `ts_update` TIMESTAMP DEFA...

What is the difference between logical data model and conceptual data model?

What is the difference between logical data model and conceptual data model?...

Node.js global variables

I asked here: Does Node.js require inheritance? And I was told that I can set variables to the global scope by leaving out the variable. This does not work for me. That is, the following does not make the _ available on required files. _ = require('u...

How to refer to Excel objects in Access VBA?

What declarations I have to make in order to be able to use Excel objects and constants from my Access 2007 VBA script? Dim wb As Workbook or Set objExcelApp = New Excel.Application or .Borders(xlEdgeBottom) Thanks...

Add new element to an existing object

I was looking for a way to add new elements to an an existing object like what push does with arrays I have tried this and it didn't work : var myFunction = { Author: 'my name ', date: '15-12-2012', doSomething: function(){ ale...

How do I get Month and Date of JavaScript in 2 digit format?

When we call getMonth() and getDate() on date object, we will get the single digit number. For example : For january, it displays 1, but I need to display it as 01. How to do that?...

Checking if an input field is required using jQuery

What would be the easiest way to check if an input is required? I have been trying stuff along these lines but always comes up with all required (only 4/6 are). $('form#register').find('input').each(function(){ if($(this).prop('required') == 'un...

Exporting functions from a DLL with dllexport

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I want to remove HTML tags from a string. For example assume we have the string: <p> example ive got a string</P> How can I write a function that removes the <p><p> and returns just "example ive got a string"?...

Should I use "camel case" or underscores in python?

So which is better and why? def my_function(): or def myFunction(): ...

How to check if a table exists in a given schema

Postgres 8.4 and greater databases contain common tables in public schema and company specific tables in company schema. company schema names always start with 'company' and end with the company number. So there may be schemas like: public company1 ...

Open Jquery modal dialog on click event

The below code works fine for only the first click event. However for any subsequent click nothing happens. I tested this on firefox, ie7 but still the same. Am I missing something? <script type="text/javascript"> $(document).ready(function()...

Adding a new SQL column with a default value

I am looking for the syntax to add a column to a MySQL database with a default value of 0 Reference...

What is Options +FollowSymLinks?

I am using a Lamp server on my computer. I started to use Laravel php framework. In my .htaccess , If I use Options +FollowSymLinks , I get 500 error. And If I comment out , I have to use index.php in my all addresses ..example: /~ytsejam/blog/pu...

DISTINCT for only one column

Let's say I have the following query. SELECT ID, Email, ProductName, ProductModel FROM Products How can I modify it so that it returns no duplicate Emails? In other words, when several rows contain the same email, I want the results to include on...

Get values from label using jQuery

I want to get month and year value from label. How can i get these using jquery? <label year="2010" month="6" id="current Month"> June  2010</label> ...

How to post object and List using postman

I am using postman packaged app to send a post request. I want to request the following controller. How to send a post requestbody using postman object(with values) and a list using the raw format? @RequestMapping(value = "register", method = ...

Hashmap with Streams in Java 8 Streams to collect value of Map

Let consider a hashmap Map<Integer, List> id1 = new HashMap<Integer,List>(); I inserted some values into both hashmap. For Example, List<String> list1 = new ArrayList<String>(); list1.add("r1"); list1.add("r4...

An "and" operator for an "if" statement in Bash

I'm trying to create a simple Bash script to check if the website is down and for some reason the "and" operator doesn't work: #!/usr/bin/env bash WEBSITE=domain.com SUBJECT="$WEBSITE DOWN!" EMAILID="[email protected]" STATUS=$(curl -sI $WEBSITE | awk '...

Batch files: How to read a file?

How you can read a file (text or binary) from a batch file? There is a way to read it in a binary mode or text mode?...

Is there more to an interface than having the correct methods

So lets say I have this interface: public interface IBox { public void setSize(int size); public int getSize(); public int getArea(); //...and so on } And I have a class that implements it: public class Rectangle implements IBox { p...

How to run a .awk file?

I am converting a CSV file into a table format, and I wrote an AWK script and saved it as my.awk. Here is the my script: #AWK for test awk -F , ' BEGIN { aa = 0; } { hdng = "fname,lname,salary,city"; l1 = length($...

How can I find script's directory?

Consider the following Python code: import os print os.getcwd() I use os.getcwd() to get the script file's directory location. When I run the script from the command line it gives me the correct path whereas when I run it from a script run by code...

Getting input values from text box

I'm trying to get the text from a text box. I have 2 input text boxes that are not in a form, and I'm trying to retrieve the value and store it in a variable. This code returns undefined in the alert box that pops up. <script> var us...

Android - how do I investigate an ANR?

Is there a way of finding out where my app threw an ANR (Application Not Responding). I took a look at the traces.txt file in /data and I see a trace for my application. This is what I see in the trace. DALVIK THREADS: "main" prio=5 tid=3 TIMED_WAIT...

Entity Framework Migrations renaming tables and columns

I renamed a a couple entities and their navigation properties and generated a new Migration in EF 5. As is usual with renames in EF migrations, by default it was going to drop objects and recreate them. That isn't what I wanted so I pretty much had t...

how to convert object into string in php

Possible Duplicate: PHP ToString() equivalent how to convert object into string in php Actually i am dealing with web service APIs.i want to use output of one API as a input for another API. when i am trying to do this i got error like th...

No plot window in matplotlib

I just installed matplotlib in Ubuntu 9.10 using the synaptic package system. However, when I try the following simple example >>> from pylab import plot; >>> plot([1,2,3],[1,2,3]) [<matplotlib.lines.Line2D object at 0x9aa78ec&...

Use getElementById on HTMLElement instead of HTMLDocument

I've been playing around with scraping data from web pages using VBS/VBA. If it were Javascript I'd be away as its easy, but it doesn't seem to be quite as straight forward in VBS/VBA. This is an example I made for an answer, it works but I had pla...

Returning http status code from Web Api controller

I'm trying to return a status code of 304 not modified for a GET method in a web api controller. The only way I succeeded was something like this: public class TryController : ApiController { public User GetUser(int userId, DateTime lastM...

How to make a simple rounded button in Storyboard?

I just started learning iOS development, cannot find how to make simple rounded button. I find resources for old versions. Do I need to set a custom background for a button? In Android, I would just use a 9 patch, but I know iOS does not have this ca...

Eclipse 3.5 Unable to install plugins

I really don't know what's going on with Eclipse 3.5 (3.5.0 or 3.5.1, same issues), but it's been now 2 days that I'm struggling with Eclipse to find a way to make the plugins installation work via the "Install New Software screen"!!! I have visited ...

Rails - How to use a Helper Inside a Controller

While I realize you are supposed to use a helper inside a view, I need a helper in my controller as I'm building a JSON object to return. It goes a little like this: def xxxxx @comments = Array.new @c_comments.each do |comment| @comments &...

How to submit form on change of dropdown list?

I am creating a page in JSP where I have a dropdown list and once the user selects a value he has to click on the go button and then the value is sent to the Servlet. </select> <input type="submit" name="GO" value="G...

How to delete a remote tag?

How do you delete a Git tag that has already been pushed?...

How to create a RelativeLayout programmatically with two buttons one on top of the other?

I'm adding two buttons to the UI, but they appear on top of one another. I want them to appear next to each other. What am I missing in this code? m_btnCrown = new ImageButton(this); m_btnCrown.setImageResource(R.drawable.king_crown_thumb); m_btnCro...

Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432?

Before anything, please note that I have found several similar questions on Stack Overflow and articles all over the web, but none of those helped me fix my issue: PG Error could not connect to server: Connection refused Is the server running on po...

Increasing Heap Size on Linux Machines

I work on Ubuntu desktop machine and I'd like to increase heap size for Java. The RAM is 16GB and the current Max Heap Size is 3GB I checked this post post Increasing Tomcat Heap Size Not much found about Ubuntu, so I tried this command: java -Xmx...

IntelliJ and Tomcat.. Howto..?

Using Netbeans, I develop sites with Tomcat as the local server to manage it. In Netbeans it was "Install, write hit Run and it works" How do I pull the same thing off in IntelliJ? I can't find step-by-step instructions for this....

Add content to a new open window

I don't know how to solve this issue, I've trying reading many post but no one answer to it. I need to open a new window with a page already coded (inside the same domain) and add some content. The problem is that if I use OpenWindow.write() the pa...

SyntaxError: Unexpected token function - Async Await Nodejs

I was experimenting on using Node version 6.2.1 with some of my code. Had plans to migrate most of the hyper-callback oriented codes to something that looks cleaner and maybe performs better. I have no clue why, the terminal throws up an error when ...

'Field required a bean of type that could not be found.' error spring restful API using mongodb

So I've been learning Spring in the couples of week, been following this tutorial Building a RESTful Web Service All was well until I tried to integrate it to mongodb. So I follow this tutorial. Accessing Data with MongoDB But my practice is part...

scrollTop animation without jquery

I'm trying to make an animated "scroll to top" effect without using jQuery. In jQuery, I usually use this code: $('#go-to-top').click(function(){ $('html,body').animate({ scrollTop: 0 }, 400); return false; }); How do I animate scro...