Examples On Programing Languages

Remove object from a list of objects in python

In Python, how can I remove an object from array of objects? Like this: x = object() y = object() array = [x,y] # Remove x I've tried array.remove() but it only works with a value, not a specific location in the array. I need to be able to delete ...

SQL (MySQL) vs NoSQL (CouchDB)

I am in the middle of designing a highly-scalable application which must store a lot of data. Just for example it will store lots about users and then things like a lot of their messages, comments etc. I have always used MySQL before but now I am min...

Apply CSS styles to an element depending on its child elements

Is it possible to define a CSS style for an element, that is only applied if the matching element contains a specific element (as the direct child item)? I think this is best explained using an example. Note: I'm trying to style the parent element,...

What is IllegalStateException?

I am trying to use the following Fastload API connection ... etc is perfect. I know exactly where it fails ........... System.out.println(" Streaming " + dataFile); pstmtFld.setAsciiStream(1, dataStream, -1); // This line fails System.out.p...

Mercurial undo last commit

How can I undo my last accidentally commited (not pushed) change in Mercurial? If possible, a way to do so with TortoiseHg would be prefered. Update In my concrete case I commited a changeset (not pushed). Then I pulled and updated from the server...

Difference between javacore, thread dump and heap dump in Websphere

Can someone tell me the exact difference between javacore, thread dump and heap dump? Under which situation each of these are used??...

Javascript variable access in HTML

Say I have the following JavaScript in a HTML page <html> <script> var simpleText = "hello_world"; var finalSplitText = simpleText.split("_"); var splitText = finalSplitText[0]; </script> <body> <a href = ...

Check Postgres access for a user

I have looked into the documentation for GRANT Found here and I was trying to see if there is a built-in function that can let me look at what level of accessibility I have in databases. Of course there is: \dp and \dp mytablename But this does not...

How can I make text appear on next line instead of overflowing?

I have a fixed width div on my page that contains text. When I enter a long string of letters it overflows. I don't want to hide overflow I want to display the overflow on a new line, see below: <div id="textbox" style="width:400px; height:200px;...

Microsoft Visual C++ Compiler for Python 3.4

I know that there is a "Microsoft Visual C++ Compiler for Python 2.7" but is there, currently or planned, a Microsoft Visual C++ Compiler for Python 3.4 or eve Microsoft Visual C++ Compiler for Python 3.x for that matter? It would be supremely benef...

adding classpath in linux

export CLASSPATH=.;../somejar.jar;../mysql-connector-java-5.1.6-bin.jar java -Xmx500m folder.subfolder../dit1/some.xml cd .. is the above statement for setting the classpath to already existing classpath in linux is correct or not...

Flask ImportError: No Module Named Flask

I'm following the Flask tutorial here: http://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world I get to the point where I try ./run.py and I get: Traceback (most recent call last): File "./run.py", line 3, in <module&g...

Last Key in Python Dictionary

I am having difficulty figuring out what the syntax would be for the last key in a Python dictionary. I know that for a Python list, one may say this to denote the last: list[-1] I also know that one can get a list of the keys of a dictionary as f...

What are the differences between B trees and B+ trees?

In a b-tree you can store both keys and data in the internal and leaf nodes, but in a b+ tree you have to store the data in the leaf nodes only. Is there any advantage of doing the above in a b+ tree? Why not use b-trees instead of b+ trees everywher...

.setAttribute("disabled", false); changes editable attribute to false

I want to have textboxes related to radiobuttons. Therefore each radio button should enable it's textbox and disable the others. However when I set the disabled attribute of textbox to true, it changes the editable attribute too. I tried setting edit...

Update cordova plugins in one command

I am wondering is there an easier way to update cordova plugin? I googled, found a hook (@ year 2013), but this is not 100% what I want. I know I can do this by two steps: rm, then add but I am looking for a better (official) way to help me which p...

How do you list volumes in docker containers?

When using docker images from registries, I often need to see the volumes created by the image's containers. Note: I'm using docker version 1.3.2 on Red Hat 7. Example The postgres official image from the Docker Registry has a volume configured fo...

What is the standard Python docstring format?

I have seen a few different styles of writing docstrings in Python, is there an official or "agreed-upon" style?...

Make Div overlay ENTIRE page (not just viewport)?

So I have a problem that I think is quite common but I have yet to find a good solution for. I want to make an overlay div cover the ENTIRE page... NOT just the viewport. I don't understand why this is so hard to do... I've tried setting body, htm...

Runnable with a parameter?

I have a need for a "Runnable that accepts a parameter" although I know that such runnable doesn't really exist. This may point to fundamental flaw in the design of my app and/or a mental block in my tired brain, so I am hoping to find here some adv...

How to avoid installing "Unlimited Strength" JCE policy files when deploying an application?

I have an app that uses 256-bit AES encryption which is not supported by Java out of the box. I know to get this to function correctly I install the JCE unlimited strength jars in the security folder. This is fine for me being the developer, I can in...

Coarse-grained vs fine-grained

What is the difference between coarse-grained and fine-grained? I have searched these terms on Google, but I couldn't find what they mean....

Vertical Align text in a Label

I have been asked to vertically align the text in the labels for the fields in a form but I don't understand why they are not moving. I have tried putting in-line styles using vertical-align:top; and other attributes like bottom and middle but it doe...

How to do vlookup and fill down (like in Excel) in R?

I have a dataset about 105000 rows and 30 columns. I have a categorical variable that I would like to assign it to a number. In Excel, I would probably do something with VLOOKUP and fill. How would I go about doing the same thing in R? Essentially,...

Python Pandas iterate over rows and access column names

I am trying to iterate over the rows of a Python Pandas dataframe. Within each row of the dataframe, I am trying to to refer to each value along a row by its column name. Here is what I have: import numpy as np import pandas as pd df = pd.DataFra...

How to split a string in shell and get the last field

Suppose I have the string 1:2:3:4:5 and I want to get its last field (5 in this case). How do I do that using Bash? I tried cut, but I don't know how to specify the last field with -f....

How do I get a consistent byte representation of strings in C# without manually specifying an encoding?

How do I convert a string to a byte[] in .NET (C#) without manually specifying a specific encoding? I'm going to encrypt the string. I can encrypt it without converting, but I'd still like to know why encoding comes to play here. Also, why should e...

How to log PostgreSQL queries?

How to enable logging of all SQL executed by PostgreSQL 8.3? Edited (more info) I changed these lines : log_directory = 'pg_log' log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' log_statement = 'all' And restart PostgreSQL serv...

Gather multiple sets of columns

I have data from an online survey where respondents go through a loop of questions 1-3 times. The survey software (Qualtrics) records this data in multiple columns—that is, Q3.2 in the survey will have columns Q3.2.1., Q3.2.2., and Q3.2.3.: df &l...

Why does Java have an "unreachable statement" compiler error?

I often find when debugging a program it is convenient, (although arguably bad practice) to insert a return statement inside a block of code. I might try something like this in Java .... class Test { public static void main(String args[]) { ...

What is the use of static constructors?

Please explain to me the use of static constructor. Why and when would we create a static constructor and is it possible to overload one?...

How to use curl in a shell script?

I'm trying to run this shell script in order to install RVM in an Ubuntu box #!/bin/bash RVMHTTP="https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer" CURLARGS="-f -s -S -k" bash < <(curl $CURLARGS $RVMHTTP) but I get th...

Python class inherits object

Is there any reason for a class declaration to inherit from object? I just found some code that does this and I can't find a good reason why. class MyClass(object): # class code follows... ...

Select rows from a data frame based on values in a vector

I have data similar to this: dt <- structure(list(fct = structure(c(1L, 2L, 3L, 4L, 3L, 4L, 1L, 2L, 3L, 1L, 2L, 3L, 2L, 3L, 4L), .Label = c("a", "b", "c", "d"), class = "factor"), X = c(2L, 4L, 3L, 2L, 5L, 4L, 7L, 2L, 9L, 1L, 4L, 2L, 5L, 4L, 2L))...

do <something> N times (declarative syntax)

Is there a way in Javascript to write something like this easily: [1,2,3].times do { something(); } Any library that might support some similar syntax maybe? Update: to clarify - I would like something() to be called 1,2 and 3 times respectivel...

Python List vs. Array - when to use?

If you are creating a 1d array, you can implement it as a List, or else use the 'array' module in the standard library. I have always used Lists for 1d arrays. What is the reason or circumstance where I would want to use the array module instead? ...

how to refresh page in angular 2

I have created one router link as below. This router link loads ProductsStartComponent and then this component loads several other components using ngif and not via navigation. Since below Product categories link is visible in all pages so if I am cl...

Windows command to get service status?

I need to know the status of a service at the end of my batch script which restarts services using "net stop thingie" and "net start thingie". In my most favorite ideal world, I would like to e-mail the state to myself, to read on cold winter nights...

Python MySQLdb TypeError: not all arguments converted during string formatting

Upon running this script: #! /usr/bin/env python import MySQLdb as mdb import sys class Test: def check(self, search): try: con = mdb.connect('localhost', 'root', 'password', 'recordsdb'); cur = con.cursor()...

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?...

How to get last N records with activerecord?

With :limit in query, I will get first N records. What is the easiest way to get last N records?...

How do you hide the Address bar in Google Chrome for Chrome Apps?

I want to increase the screen real estate for my Chrome app. The Address Bar is useless in a Chrome App and I was wondering if there was a way to disable it....

What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications?

What programming languages can one use to develop iPhone, iPod Touch and iPad (iOS) applications? Also are there plans in the future to expand the amount of programming languages that iOS will support?...

Plotting time-series with Date labels on x-axis

I know that this question might be a cliche, but I'm having hard time doing it. I've data set in the following format: Date Visits 11/1/2010 696537 11/2/2010 718748 11/3/2010 799355 11/4/2010 ...

Mercurial: how to amend the last commit?

I'm looking for a counter-part of git commit --amend in Mercurial, i.e. a way to modify the commit which my working copy is linked to. I'm only interested in the last commit, not an arbitrary earlier commit. The requirements for this amend-procedure...

How to insert a character in a string at a certain position?

I'm getting in an int with a 6 digit value. I want to display it as a String with a decimal point (.) at 2 digits from the end of int. I wanted to use a float but was suggested to use String for a better display output (instead of 1234.5 will be 1234...

How do I write a Windows batch script to copy the newest file from a directory?

I need to copy the newest file in a directory to a new location. So far I've found resources on the forfiles command, a date-related question here, and another related question. I'm just having a bit of trouble putting the pieces together! How do I c...

C++ obtaining milliseconds time on Linux -- clock() doesn't seem to work properly

On Windows, clock() returns the time in milliseconds, but on this Linux box I'm working on, it rounds it to the nearest 1000 so the precision is only to the "second" level and not to the milliseconds level. I found a solution with Qt using the QTime...

How do I escape special characters in MySQL?

For example: select * from tablename where fields like "%string "hi" %"; Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'hi" "' at line 1 How do I...

Android Respond To URL in Intent

I want my intent to be launched when the user goes to a certain url: for example, the android market does this with http://market.android.com/ urls. so does youtube. I want mine to do that too....

Convert JSON to Map

What is the best way to convert a JSON code as this: { "data" : { "field1" : "value1", "field2" : "value2" } } in a Java Map in which one the keys are (field1, field2) and the values for those fields are (value1, va...

only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices

I am implementing fft as part of my homework. My problem lies in the implemention of shuffling data elements using bit reversal. I get the following warning: DeprecationWarning: using a non-integer number instead of an integer will result in an erro...

How to count the number of files in a directory using Python

I need to count the number of files in a directory using Python. I guess the easiest way is len(glob.glob('*')), but that also counts the directory itself as a file. Is there any way to count only the files in a directory?...

How to link HTML5 form action to Controller ActionResult method in ASP.NET MVC 4

I have a basic form for which I want to handle buttons inside the form by calling the ActionResult method in the View's associated Controller class. Here is the following HTML5 code for the form: <h2>Welcome</h2> <div> <h3...

Can regular JavaScript be mixed with jQuery?

For example, can I take this script (from mozilla tutorial): <html> <head> <script type="application/javascript"> function draw() { var canvas = document.getElementById("canvas"); if (canvas.getContext) { ...

How to insert data to MySQL having auto incremented primary key?

I've created a table with a primary key and enabled AUTO_INCREMENT, how do I get MYSQL use AUTO_INCREMENT? CREATE TABLE IF NOT EXISTS test.authors ( hostcheck_id INT PRIMARY KEY AUTO_INCREMENT, instance_id INT, host_object_id INT, ch...

Find and replace with sed in directory and sub directories

I run this command to find and replace all occurrences of 'apple' with 'orange' in all files in root of my site: find ./ -exec sed -i 's/apple/orange/g' {} \; But it doesn't go through sub directories. What is wrong with this command? Here are s...

The POM for project is missing, no dependency information available

Background Trying to add a Java library to the local Maven repository using a clean install of Apache Maven 3.1.0, with Java 1.7. Here is how the Java archive file was added: mvn install:install-file \ -DgroupId=net.sourceforge.ant4x \ -Dartifa...

Python Dictionary contains List as Value - How to update?

I have a dictionary which has value as a list. dictionary = { 'C1' : [10,20,30] 'C2' : [20,30,40] } Let's say I want to increment all the values in list of C1 by 10, how do I do it? dictionary.get('C1'...

How do I get Bin Path?

I need to the the bin path of the executing assembly. How do you get it? I have a folder Plugins in the Bin/Debug and I need to get the location...

Close Bootstrap Modal

I have a bootstrap modal dialog box that I want to show initially, then when the user clicks on the page, it disappears. I have the following: $(function () { $('#modal').modal(toggle) }); <div class="modal" id='modal'> <div class...

WebService Client Generation Error with JDK8

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

How can I nullify css property?

Basically I have two external css in my page. The first Main.css contains all style rules but I don't have access to it, and hence I cannot modify it. I have access to a second file Template.css , so I need to override the Main.css's values in templ...

Programmatically get own phone number in iOS

Is there any way to get own phone number by standard APIs from iPhone SDK?...

Convert Go map to json

I tried to convert my Go map to a json string with encoding/json Marshal, but it resulted in a empty string. Here's my code : package main import ( "encoding/json" "fmt" ) type Foo struct { Number int `json:"number"` Title str...

How to get a thread and heap dump of a Java process on Windows that's not running in a console

I have a Java application that I run from a console which in turn executes an another Java process. I want to get a thread/heap dump of that child process. On Unix, I could do a kill -3 <pid> but on Windows AFAIK the only way to get a thread d...

Reasons for a 409/Conflict HTTP error when uploading a file to sharepoint using a .NET WebRequest?

I've got a method that uses a WebRequest to upload a file to a sharepoint 2010 list/folder, using a PUT request, with the Overwrite Header set to T (overwrite). When several files are uploaded (method is called several times), some requests fail wit...

Nginx location "not equal to" regex

How do I set a location condition in Nginx that responds to anything that isn't equal to the listed locations? I tried: location !~/(dir1|file2\.php) { rewrite ^/(.*) http://example.com/$1 permanent; } But it doesn't trigger the redirect. I...

Linq UNION query to select two elements

I want to select 2 elements from my database table using LINQ query and I saw an example which use UNION I don't have much experience but I think that maybe this is what I need but I get an error which I can not fix and I'm not sure if it's fixable a...

Numpy matrix to array

I am using numpy. I have a matrix with 1 column and N rows and I want to get an array from with N elements. For example, if i have M = matrix([[1], [2], [3], [4]]), I want to get A = array([1,2,3,4]). To achieve it, I use A = np.array(M.T)[0]. Does...

How to convert a SVG to a PNG with ImageMagick?

I have a SVG file that has a defined size of 16x16. When I use ImageMagick's convert program to convert it into a PNG, then I get a 16x16 pixel PNG which is way too small: convert test.svg test.png I need to specify the pixel size of the output PN...

How do I keep jQuery UI Accordion collapsed by default?

I am working with jQuery UI Accordion and it works great, but I would like to have the accordion stay closed unless it I click on it. I am using this code right now, which allows be to toggle it closed: $("#accordion").accordion({ header: "h3", col...

How to convert char to integer in C?

Possible Duplicates: How to convert a single char into an int Character to integer in C Can any body tell me how to convert a char to int? char c[]={'1',':','3'}; int i=int(c[0]); printf("%d",i); When I try this it gives 49....

Code signing is required for product type 'Application' in SDK 'iOS 10.0' - StickerPackExtension requires a development team error

I am facing the below issue and am unable to build the application. XXX has conflicting provisioning settings. XXX is automatically provisioned, but provisioning profile WildCard has been manually specified. Set the provisioning profile value...

How to close the current fragment by using Button like the back button?

I have try to close the current fragment by using Imagebutton. I am in Fragment-A and it will turn to the Fragment-B when I click the button. And when I click the button at Fragment-B , it will turn to the Fragment-C and close the Fragment-B. If I...

How do I reference a cell within excel named range?

For example, I have a named range A10—A20 as Age; how do I get Age[5] which is same as A14. I can write "=A14" but I did like to write "=Age$5" or something similar....

CSS background image to fit width, height should auto-scale in proportion

I have body { background: url(images/background.svg); } The desired effect is that this background image will have width equal to that of the page, height changing to maintain the proportion. e.g. if the original image happens to be 100*200 (a...

Get the cartesian product of a series of lists?

How can I get the Cartesian product (every possible combination of values) from a group of lists? Input: somelists = [ [1, 2, 3], ['a', 'b'], [4, 5] ] Desired output: [(1, 'a', 4), (1, 'a', 5), (1, 'b', 4), (1, 'b', 5), (2, 'a', 4), (2...

How should I read a file line-by-line in Python?

In pre-historic times (Python 1.4) we did: fp = open('filename.txt') while 1: line = fp.readline() if not line: break print line after Python 2.1, we did: for line in open('filename.txt').xreadlines(): print line before ...

How to preventDefault on anchor tags?

Let's say I have an anchor tag such as <a href="#" ng-click="do()">Click</a> How can I prevent the browser from navigating to # in AngularJS ?...

Converting HTML to XML

I have got hundereds of HTML files that need to be conveted in XML. We are using these HTML to serve contents for applications but now we have to serve these contents as XML. HTML files are contains, tables, div's, image's, p's, b or strong tags, ...

Gradle: Execution failed for task ':processDebugManifest'

I'm getting a gradle error at building since yesterday - it just came randomly.... Full stacktrace here: My project depends on multiple libraries and it built without any problems until yesterday (even with the librarys) compile 'com.google.androi...

How to get the current plugin directory in WordPress?

I need to get the current plugin directory like [wordpress_install_dir]/wp-content/plugins/plugin_name (if getcwd() called from the plugin, it returns [wordpress_install_dir], the root of installation) thanks for help...

C# delete a folder and all files and folders within that folder

I'm trying to delete a folder and all files and folders within that folder, I'm using the code below and I get the error Folder is not empty, any suggestions on what I can do? try { var dir = new DirectoryInfo(@FolderPath); dir.Attributes = dir....

Is there a better way to run a command N times in bash?

I occasionally run a bash command line like this: n=0; while [[ $n -lt 10 ]]; do some_command; n=$((n+1)); done To run some_command a number of times in a row -- 10 times in this case. Often some_command is really a chain of commands or a pipelin...

Best way to use multiple SSH private keys on one client

I want to use multiple private keys to connect to different servers or different portions of the same server (my uses are system administration of server, administration of Git, and normal Git usage within the same server). I tried simply stacking th...

Dead simple example of using Multiprocessing Queue, Pool and Locking

I tried to read the documentation at http://docs.python.org/dev/library/multiprocessing.html but I'm still struggling with multiprocessing Queue, Pool and Locking. And for now I was able to build the example below. Regarding Queue and Pool, I'm not...

String.Format not work in TypeScript

String.Format does not work in TypeScript. Error: The property 'format' does not exist on value of type '{ prototype: String; fromCharCode(...codes: number[]): string; (value?: any): string; new(value?: any): String; }'. attributes["Title"...

fcntl substitute on Windows

I received a Python project (which happens to be a Django project, if that matters,) that uses the fcntl module from the standard library, which seems to be available only on Linux. When I try to run it on my Windows machine, it stops with an ImportE...

Is there a way to access an iteration-counter in Java's for-each loop?

Is there a way in Java's for-each loop for(String s : stringArray) { doSomethingWith(s); } to find out how often the loop has already been processed? Aside from using the old and well-known for(int i=0; i < boundary; i++) - loop, is the cons...

CSS: Force float to do a whole new line

I have a bunch of float: left elements and some are SLIGHTLY bigger than others. I want the newline to break and have the images float all the way to the left instead of getting stuck on a bigger element. Here is the page I'm talking about : link I...

How to 'foreach' a column in a DataTable using C#?

How do I loop through each column in a datarow using foreach? DataTable dtTable = new DataTable(); MySQLProcessor.DTTable(mysqlCommand, out dtTable); foreach (DataRow dtRow in dtTable.Rows) { //foreach(DataColumn dc in dtRow) } ...

How to add a string to a string[] array? There's no .Add function

private string[] ColeccionDeCortes(string Path) { DirectoryInfo X = new DirectoryInfo(Path); FileInfo[] listaDeArchivos = X.GetFiles(); string[] Coleccion; foreach (FileInfo FI in listaDeArchivos) { //Add the FI.Name to t...

"401 Unauthorized" on a directory

I assume this is an IIS error, as this doesn't happen if I run the project on my local machine. I have my stylesheets at ~/Content/css Any files in that directory won't load on the page, and when I navigate to them directly, I get a server error: 40...

Interface type check with Typescript

This question is the direct analogon to Class type check with TypeScript I need to find out at runtime if a variable of type any implements an interface. Here's my code: interface A{ member:string; } var a:any={member:"foobar"}; if(a instance...

Login to website, via C#

I'm relatively new to using C#, and have an application that reads parts of the source code on a website. That all works; but the problem is that the page in question requires the user to be logged in to access this source code. What my program needs...

How do I deserialize a complex JSON object in C# .NET?

I have a JSON string and I need some help to deserialize it. Nothing worked for me... This is the JSON: { "response": [{ "loopa": "81ED1A646S894309CA1746FD6B57E5BB46EC18D1FAff", "drupa": "D4492C3CCE7D6F839B2BASD2F08577F89A27B4ff...

Python error: TypeError: 'module' object is not callable for HeadFirst Python code

I'm following the tutorial from the HeadFirst Python book. In chapter 7, I get an error message when trying to run the next code: Athlete class: class AthleteList(list): def __init__(self, a_name, a_dob=None, a_times=[]): list.__init__(...

How to mock location on device?

How can I mock my location on a physical device (Nexus One)? I know you can do this with the emulator in the Emulator Control panel, but this doesn't work for a physical device....

Adding a user on .htpasswd

I am using .htpasswd to password protect certain directory on my server. However, I noticed that everytime I do this sudo htpasswd -c /etc/apache2/.htpasswd newuser my current contents of .htpasswd will be overwritten. Every directory of my site has ...

Dynamically change color to lighter or darker by percentage CSS (Javascript)

We have a big application on the site and we have a few links which are, let's say blue color like the blue links on this site. Now I want to make some other links, but with lighter color. Obviously I can just do simply by the hex code adding in the ...

How to pass command-line arguments to a PowerShell ps1 file

For years, I have used the cmd/DOS/Windows shell and passed command-line arguments to batch files. For example, I have a file, zuzu.bat and in it, I access %1, %2, etc. Now, I want to do the same when I call a PowerShell script when I am in a Cmd.exe...

Launching an application (.EXE) from C#?

How can I launch an application using C#? Requirements: Must work on Windows XP and Windows Vista. I have seen a sample from DinnerNow.net sampler that only works in Windows Vista....

Looking to understand the iOS UIViewController lifecycle

Could you explain me the correct manner to manage the UIViewController lifecycle? In particular, I would like to know how to use Initialize, ViewDidLoad, ViewWillAppear, ViewDidAppear, ViewWillDisappear, ViewDidDisappear, ViewDidUnload and Dispose m...

selected value get from db into dropdown select box option using php mysql error

I need to get selected value from db into select box. please, tell me how to do it. Here is the code. Note: 'options' value depends on the category. <?php $sql = "select * from mine where username = '$user' "; $res = mysql_query($sql); w...

anaconda/conda - install a specific package version

I want to install the 'rope' package in my current active environment using conda. Currently, the following 'rope' versions are available: (data_downloader)user@user-ThinkPad ~/code/data_downloader $ conda search rope Using Anaconda Cloud api site h...

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"....

What is the difference between 'git pull' and 'git fetch'?

What are the differences between git pull and git fetch?...

how to append a css class to an element by javascript?

Suppose a HTML element's id is known, so the element can be refereced using: document.getElementById(element_id); Does a native Javascript function exist that can be used to append a CSS class to that element?...

How can I find a specific element in a List<T>?

My application uses a list like this: List<MyClass> list = new List<MyClass>(); Using the Add method, another instance of MyClass is added to the list. MyClass provides, among others, the following methods: public void SetId(String Id...

In HTML5, should the main navigation be inside or outside the <header> element?

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How can I perform an inspect element in Chrome on my Galaxy S3 Android device?

How can I perform an inspect element in Chrome on my Galaxy S3 Android device? I've tried a couple of guides online, one saying to use this android SDK thing to run adb forward tcp:9222 localabstract:chrome_devtools_remote, but all that says is "err...

How to revert to origin's master branch's version of file

I'm in my local computer's master branch of a cloned master-branch of a repo from a remote server. I updated a file, and I want to revert back to the original version from the remote master branch. How can I do this?...

Error handling in C code

What do you consider "best practice" when it comes to error handling errors in a consistent way in a C library. There are two ways I've been thinking of: Always return error code. A typical function would look like this: MYAPI_ERROR getObjectSize(...

Testing pointers for validity (C/C++)

Is there any way to determine (programatically, of course) if a given pointer is "valid"? Checking for NULL is easy, but what about things like 0x00001234? When trying to dereference this kind of pointer an exception/crash occurs. A cross-platform m...

How do I sort a table in Excel if it has cell references in it?

I have a table of data in excel in sheet 1 which references various different cells in many other sheets. When I try to sort or filter the sheet, the references change when the cell moves. However, I don't want to manually go into each cell and inser...

Can I give the col-md-1.5 in bootstrap?

I want to adjust the columns in Twitter Bo?tstrap. I know in bootstrap there are 12 columns grid. Is there any way to manipulate the grids to have 1.5 3.5 3.5 3.5 instead of 3 3 3 3?...

What does <meta http-equiv="X-UA-Compatible" content="IE=edge"> do?

What's the difference if one web page starts with <!DOCTYPE html> <html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge"> and If page starts with <!DOCTYPE html> <html> <head> ...

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?...

How to deal with SQL column names that look like SQL keywords?

One of my columns is called from. I can't change the name because I didn't make it. Am I allowed to do something like SELECT from FROM TableName or is there a special syntax to avoid the SQL Server being confused?...

Create a simple HTTP server with Java?

What's the easiest way to create a simple HTTP server with Java? Are there any libraries in commons to facilitate this? I only need to respond to GET/POST, and I can't use an application server. What's the easiest way to accomplish this?...

PHP how to get local IP of system

I need to get local IP of computer like 192.*.... Is this possible with PHP? I need IP address of system running the script, but I do not need the external IP, I need his local network card address....

How to get the number of days of difference between two dates on mysql?

I need to get the number of days contained within a couple of dates on MySQL. For example: Check in date is 12-04-2010 Check out date 15-04-2010 The day difference would be 3 ...

Referenced Project gets "lost" at Compile Time

I have a C# solution with two projects: a service (the main project) and a logger. The service uses classes from the logger. I've added a Reference to the logger project within the service project. At design time, autocomplete works fine: the logger'...

How to sort a file, based on its numerical values for a field?

Example file.txt: 100 foo 2 bar 300 tuu When using sort -k 1,1 file.txt, the order of lines will not change, though we are expecting : 2 bar 100 foo 300 tuu How to sort a field consisting of numbers based on the absolute numerical v...

Creating a Plot Window of a Particular Size

How can I create a new on-screen R plot window with a particular width and height (in pixels, etc.)?...

Determine if Python is running inside virtualenv

Is it possible to determine if the current script is running inside a virtualenv environment?...

jQuery: Get height of hidden element in jQuery

I need to get height of an element that is within a div that is hidden. Right now I show the div, get the height, and hide the parent div. This seems a bit silly. Is there a better way? I'm using jQuery 1.4.2: $select.show(); optionHeight = $firstO...

SQL Server 2008 - Help writing simple INSERT Trigger

This is with Microsoft SQL Server 2008. I've got 2 tables, Employee and EmployeeResult and I'm trying to write a simple INSERT trigger on EmployeeResult that does this - each time an INSERT is done into EmployeeResult such as: (Jack, 200, Sales) (J...

What's the difference between Instant and LocalDateTime?

I know that: Instant is rather a "technical" timestamp representation (nanoseconds) for computing. LocalDateTime is rather date/clock representation including time-zones for humans. Still in the end IMO both can be taken as type for most applicat...

Java - Reading XML file

I am trying to read in some data from an XML file and having some trouble, the XML I have is as follows: <xml version="1.0" encoding="UTF-8"?> <EmailSettings> <recipient>[email protected]</recipient> <sender>test2@...

AngularJS - Multiple ng-view in single template

I am building a dynamic web app by using AngularJS. Is it possible to have multiple ng-view on a single template?...

Can you autoplay HTML5 videos on the iPad?

The <video> tags autoplay="autoplay" attribute works fine in Safari. When testing on an iPad, the video must be activated manually. I thought it was a loading issue, so I ran a loop checking for the status of the media: videoPlay: function()...

Methods vs Constructors in Java

I have just started programming with Java. The text we use is lacking when talking about methods and constructors. I'm not sure what a method or a constructor is exactly and what makes each unique. Can someone please help me define them and different...

Setting JDK in Eclipse

I have two JDKs, for Java 6 and 7. I want to build my project using both. Initially we only built against 1.6. I see in my project setting I can select 1.5, 1.6 1.7 as the compiler level. How are these options added to the IDE? I never installed Ja...

How can I parse a YAML file from a Linux shell script?

I wish to provide a structured configuration file which is as easy as possible for a non-technical user to edit (unfortunately it has to be a file) and so I wanted to use YAML. I can't find any way of parsing this from a Unix shell script however. ...

convert php date to mysql format

I have a date field in php which is using this code: $date = mysql_real_escape_string($_POST['intake_date']); How do I convert this to MySql format 0000-00-00 for inclusion in db. Is it along the lines of: date('Y-m-d' strtotime($date);. The reas...

Node.js: How to send headers with form data using request module?

I have code like the following: var req = require('request'); req.post('someUrl', { form: { username: 'user', password: '', opaque: 'someValue', logintype: '1'}, }, function (e, r, body) { console.log(body); }); How can I set headers ...

How to create exe of a console application

How can we create the exe for a console forms application ?...

Laravel migration table field's type change

Following is my file 2015_09_14_051851_create_orders_table.php. And I want to change $table->integer('category_id'); as a string with new migration. <?php use Illuminate\Database\Schema\Blueprint; use Illuminate\Database\Migrations\Migration;...

How can I pass a list as a command-line argument with argparse?

I am trying to pass a list as an argument to a command line program. Is there an argparse option to pass a list as option? parser.add_argument('-l', '--list', type=list, action='store', dest='list', ...

What is tail recursion?

Whilst starting to learn lisp, I've come across the term tail-recursive. What does it mean exactly?...

How to tell git to use the correct identity (name and email) for a given project?

I use my personal laptop for both work and personal projects and I would like to use my work email address for my commits at work (gitolite) and my personal email address for the rest (github). I read about the following solutions which are all eith...

Tensorflow import error: No module named 'tensorflow'

I installed TensorFlow on my Windows Python 3.5 Anaconda environment The validation was successful (with a warning) (tensorflow) C:\>python Python 3.5.3 |Intel Corporation| (default, Apr 27 2017, 17:03:30) [MSC v.1900 64 bit (AMD64)] on win32 ...

Print all properties of a Python Class

I have a class Animal with several properties like: class Animal(object): def __init__(self): self.legs = 2 self.name = 'Dog' self.color= 'Spotted' self.smell= 'Alot' self.age = 10 self.kids = 0 ...

Multiple scenarios @RequestMapping produces JSON/XML together with Accept or ResponseEntity

I am working with Spring 4.0.7 About Spring MVC, for research purposes, I have the following: @RequestMapping(value="/getjsonperson", method=RequestMethod.GET, produces=MediaType.APPLICATION_JSON_VALUE) public @Re...

iPhone/iPad browser simulator?

I need to see how my webpages are looking on an iPhone and iPad on my windows desktop. Is this possible? A quick search yielded some iPhone testing sites, which seemed like what I wanted. However, they are wildly inaccurate when I compared against m...

How to undo a successful "git cherry-pick"?

On a local repo, I've just executed git cherry-pick SHA without any conflicts or problems. I then realized I didn't want to do what I just did. I have not pushed this anywhere. How can I remove just this cherry pick? I'd like to know if there's a w...

SVN: Is there a way to mark a file as "do not commit"?

With TortoiseSVN, I can move a file into the ignore-on-commit changelist, so that when I commit a whole tree, changes to that file do not get committed. Is there a way to do something like that using the svn command-line tool? EDIT: Thanks for the ...

Python for and if on one line

I have a issue with python. I make a simple list: >>> my_list = ["one","two","three"] I want create a "single line code" for find a string. for example, I have this code: >>> [(i) for i in my_list if i=="two"] ['two'] But wh...

Running Java gives "Error: could not open `C:\Program Files\Java\jre6\lib\amd64\jvm.cfg'"

After years of working OK, I'm suddenly getting this message when trying to start the JVM: Error: could not open `C:\Program Files\Java\jre6\lib\amd64\jvm.cfg' I tried uninstalling, and got a message saying a DLL was missing (unspecified) Tried re...

Combining C++ and C - how does #ifdef __cplusplus work?

I'm working on a project that has a lot of legacy C code. We've started writing in C++, with the intent to eventually convert the legacy code, as well. I'm a little confused about how the C and C++ interact. I understand that by wrapping the C cod...

Meaning of ${project.basedir} in pom.xml

What is the meaning of <directory>${project.basedir}</directory> and ${project.build.directory} in pom.xml...

Counting Number of Letters in a string variable

I'm trying to count the number of letters in a string variable. I want to make a Hangman game, and I need to know how many letters are needed to match the amount in the word....

delete_all vs destroy_all?

I am looking for the best approach to delete records from a table. For instance, I have a user whose user ID is across many tables. I want to delete this user and every record that has his ID in all tables. u = User.find_by_name('JohnBoy') u.usage_i...

How to specify in crontab by what user to run script?

I have few crontab jobs that run under root, but that gives me some problems. For example all folders created in process of that cron job are under user root and group root. How can i make it to run under user www-data and group www-data so when i r...

Docker: Copying files from Docker container to host

I'm thinking of using Docker to build my dependencies on a Continuous Integration (CI) server, so that I don't have to install all the runtimes and libraries on the agents themselves. To achieve this I would need to copy the build artifacts that ar...

Changing WPF title bar background color

I have a WPF Windows application. I need to change the background color of the title bar. How can I do that?...

Download files in laravel using Response::download

In Laravel application I'm trying to achieve a button inside view that can allow user to download file without navigating to any other view or route Now I have two issues: (1) below function throwing The file "/public/download/info.pdf" does not e...

Fastest way to check if a string matches a regexp in ruby?

What is the fastest way to check if a string matches a regular expression in Ruby? My problem is that I have to "egrep" through a huge list of strings to find which are the ones that match a regexp that is given at runtime. I only care about whether...

How to get a single value from FormGroup

I am aware I can get the values of a form using JSON.stringify(this.formName.value) however, I want to get a single value from the form. How do I go about doing that?...

Excel VBA - How to Redim a 2D array?

In Excel via Visual Basic, I am iterating through a CSV file of invoices that is loaded into Excel. The invoices are in a determinable pattern by client. I am reading them into a dynamic 2D array, then writing them to another worksheet with older in...

Bind TextBox on Enter-key press

The default databinding on TextBox is TwoWay and it commits the text to the property only when TextBox lost its focus. Is there any easy XAML way to make the databinding happen when I press the Enter key on the TextBox?. I know it is pretty easy to ...

Aren't promises just callbacks?

I've been developing JavaScript for a few years and I don't understand the fuss about promises at all. It seems like all I do is change: api(function(result){ api2(function(result2){ api3(function(result3){ // do work ...

delete image from folder PHP

I have a folder where I keep my images, named img/. I have a table with all of my images: <table border="3"> <tr> <td> <?php $files = glob("img/*"); foreach ($files as $file) {...

Get IPv4 addresses from Dns.GetHostEntry()

I've got some code here that works great on IPv4 machines, but on our build server (an IPv6) it fails. In a nutshell: IPHostEntry ipHostEntry = Dns.GetHostEntry(string.Empty); The documentation for GetHostEntry says that passing in string.Empty w...

Issue with background color in JavaFX 8

Looks like there is an issue with setting background colors for panels in JavaFX 8. I had been trying the below, but none of them set the appropriate background colors. VBox panel = new VBox(); panel.setAlignment(Pos.TOP_LEFT); // None of the belo...

Python time measure function

I want to create a python function to test the time spent in each function and print its name with its time, how i can print the function name and if there is another way to do so please tell me def measureTime(a): start = time.clock() a() ...

How to send authorization header with axios

How can I send an authentication header with a token via axios.js? I have tried a few things without success, for example: const header = `Authorization: Bearer ${token}`; return axios.get(URLConstants.USER_URL, { headers: { header } }); Gives me...

Subprocess check_output returned non-zero exit status 1

This is my python code: import subprocess subprocess.check_output("ls",shell=True,stderr=subprocess.STDOUT) import subprocess subprocess.check_output("yum",shell=True,stderr=subprocess.STDOUT) The first .check_output() works well, but the second ...

Escaping backslash in string - javascript

I need to show the name of the currently selected file (in <input type="file"> element). Everything is fine, the only problem is I'm getting this kind of string "C:\fakepath \typog_rules.pdf" (browset automatically puts this as value for the ...

Jackson enum Serializing and DeSerializer

I'm using JAVA 1.6 and Jackson 1.9.9 I've got an enum public enum Event { FORGOT_PASSWORD("forgot password"); private final String value; private Event(final String description) { this.value = description; } @JsonValue...

Is the MIME type 'image/jpg' the same as 'image/jpeg'?

Pretty simple question but can't seem to find it anywhere online. I'm trying to make a program that depending on the file type will give me the extension....

Java NIO: What does IOException: Broken pipe mean?

For some of my Java NIO connections, when I have a SocketChannel.write(ByteBuffer) call, it throws an IOException: "Broken pipe". What causes a "broken pipe", and, more importantly, is it possible to recover from that state? If it cannot be recovere...

Recursively look for files with a specific extension

I'm trying to find all files with a specific extension in a directory and its subdirectories with my bash (Latest Ubuntu LTS Release). This is what's written in a script file: #!/bin/bash directory="/home/flip/Desktop" suffix="in" browsefolders (...

How do I use Safe Area Layout programmatically?

Since I don't use storyboards to create my views, I was wondering if there's the "Use Safe Area Guides" option programmatically or something like that. I've tried to anchor my views to view.safeAreaLayoutGuide but they keep overlapping the top n...

Automate scp file transfer using a shell script

I have some n number of files in a directory on my unix system. Is there a way to write a shellscript that will transfer all those files via scp to a specified remote system. I'll specify the password within the script, so that I don't have to enter ...

Merge/flatten an array of arrays

I have a JavaScript array like: [["$6"], ["$12"], ["$25"], ["$25"], ["$18"], ["$22"], ["$10"]] How would I go about merging the separate inner arrays into one like: ["$6", "$12", "$25", ...] ...

How to run a task when variable is undefined in ansible?

I am looking for a way to perform a task when ansible variable is not registers /undefined e.g -- name: some task command: sed -n '5p' "{{app.dirs.includes}}/BUILD.info" | awk '{print $2}' when: (! deployed_revision) AND ( !deployed_revisio...

Attempt by security transparent method 'WebMatrix.WebData.PreApplicationStartCode.Start()'

Update: same for mvc 4 to mvc 5. I started a new mvc 4 project and migrated an mvc 3 project in it (controllers/models/scripts etc). While everything compiles now i get the following error: Attempt by security transparent method 'WebMatrix.WebDa...

How can I limit possible inputs in a HTML5 "number" element?

For <input type="number"> element, maxlength is not working. How can I restrict the maxlength for that number element?...

Why should you use strncpy instead of strcpy?

Edit: I've added the source for the example. I came across this example: char source[MAX] = "123456789"; char source1[MAX] = "123456789"; char destination[MAX] = "abcdefg"; char destination1[MAX] = "abcdefg"; char *return_string; int index = 5; /*...

Set max-height on inner div so scroll bars appear, but not on parent div

I have my HTML, CSS set up as per the code below. I have also added a JSFiddle link since it will be far more convenient to see the code in action. The problem I'm having is that when there is a lot of text in the #inner-right div within the #right-...

Generating Random Passwords

When a user on our site loses his password and heads off to the Lost Password page we need to give him a new temporary password. I don't really mind how random this is, or if it matches all the "needed" strong password rules, all I want to do is give...

How to Get XML Node from XDocument

How to Get an XML Element from XDocument using LINQ ? Suppose I have an XDocument Named XMLDoc which is shown below: <Contacts> <Node> <ID>123</ID> <Name>ABC</Name> </Node&g...

Axios get access to response header fields

I'm building a frontend app with React and Redux and I'm using axios to perform my requests. I would like to get access to all the fields in the header of the response. In my browser I can inspect the header and I can see that all the fields that I n...

Char to int conversion in C

If I want to convert a single numeric char to it's numeric value, for example, if: char c = '5'; and I want c to hold 5 instead of '5', is it 100% portable doing it like this? c = c - '0'; I heard that all character sets store the numbers in co...

makefiles - compile all c files at once

I want to experiment with GCC whole program optimizations. To do so I have to pass all C-files at once to the compiler frontend. However, I use makefiles to automate my build process, and I'm not an expert when it comes to makefile magic. How should...

Limit the size of a file upload (html input element)

I would like to simply limit the size of a file that a user can upload. I thought maxlength = 20000 = 20k but that doesn't seem to work at all. I am running on Rails, not PHP, but was thinking it'd be much simpler to do it client side in the HTML...

How can I make a div stick to the top of the screen once it's been scrolled to?

I would like to create a div, that is situated beneath a block of content but that once the page has been scrolled enough to contact its top boundary, becomes fixed in place and scrolls with the page....

CSS3 selector :first-of-type with class name?

Is it possible to use the CSS3 selector :first-of-type to select the first element with a given class name? I haven't been successful with my test so I'm thinking it's not? The Code (http://jsfiddle.net/YWY4L/): _x000D_ _x000D_ p:first-of-type {col...

How can I make a CSS glass/blur effect work for an overlay?

I am having trouble applying a blur effect on a semi-transparent overlay div. I'd like everything behind the div the be blurred, like this: Here is a jsfiddle which doesn't work: http://jsfiddle.net/u2y2091z/ Any ideas how to make this work? I'd ...

How do I hide an element on a click event anywhere outside of the element?

I would like to know whether this is the correct way of hiding visible elements when clicked anywhere on the page. $(document).click(function (event) { $('#myDIV:visible').hide(); }); The element (div, span, etc.) shouldn't disapp...

Which websocket library to use with Node.js?

Currently there is a plethora of websocket libraries for node.js, the most popular seem to be: https://github.com/Worlize/WebSocket-Node https://github.com/einaros/ws https://github.com/LearnBoost/engine.io https://github.com/learnboost/socket.io h...

Extract a substring using PowerShell

How can I extract a substring using PowerShell? I have this string ... "-----start-------Hello World------end-------" I have to extract ... Hello World What is the best way to do that?...

What is IPV6 for localhost and 0.0.0.0?

As we all know the IPv4 address for localhost is 127.0.0.1 (loopback address). What is the IPv6 address for localhost and for 0.0.0.0 as I need to block some ad hosts....

Prevent Caching in ASP.NET MVC for specific actions using an attribute

I have an ASP.NET MVC 3 application. This application requests records through jQuery. jQuery calls back to a controller action that returns results in JSON format. I have not been able to prove this, but I'm concerned that my data may be getting cac...

Handling InterruptedException in Java

What is the difference between the following ways of handling InterruptedException? What is the best way to do it? try{ //... } catch(InterruptedException e) { Thread.currentThread().interrupt(); } OR try{ //... } catch(InterruptedExceptio...

SQL Server IN vs. EXISTS Performance

I'm curious which of the following below would be more efficient? I've always been a bit cautious about using IN because I believe SQL Server turns the result set into a big IF statement. For a large result set, this could result in poor performance...

check for null date in CASE statement, where have I gone wrong?

My source table looks like this Id StartDate 1 (null) 2 12/12/2009 3 10/10/2009 I want to create a select statement, that selects the above, but also has an additional column to display a varchar if the date is not null such as ...

Strings and character with printf

I was confused with usage of %c and %s in the following C program #include <stdio.h> void main() { char name[]="siva"; printf("%s\n",name); printf("%c\n",*name); } Output is siva s Why we need to...

Laravel-5 how to populate select box from database with id value and name value

I want to create a select box like the one below using illuminate\html : <select> <option value="$item->id">$item->name</option> <option value="$item->id">$item->name</option> </select> In my...

How can I check if a scrollbar is visible?

Is it possible to check the overflow:auto of a div? For example: HTML <div id="my_div" style="width: 100px; height:100px; overflow:auto;" class="my_class"> * content </div> JQUERY $('.my_class').live('hover', function (event) { ...

JavaScript ES6 promise for loop

for (let i = 0; i < 10; i++) { const promise = new Promise((resolve, reject) => { const timeout = Math.random() * 1000; setTimeout(() => { console.log(i); }, timeout); }); // TODO: Chain this ...

powershell - list local users and their groups

I'd like to have a report with all the local users and their relative groups (users, power users, administrators and so on. I get the users in this way: $adsi = [ADSI]"WinNT://." $adsi.psbase.children | where {$_.psbase.schemaClassName -match "user...

Switch: Multiple values in one case?

I have the following piece of code, but yet when I enter "12" I still get "You an old person". Isn't 9 - 15 the numbers 9 UNTIL 15? How else do I handle multiple values with one case? int age = Convert.ToInt32(txtBoxAge.Text); switch (age) ...

How can I recognize touch events using jQuery in Safari for iPad? Is it possible?

Is it possible to recognize touch events on the iPad's Safari browser using jQuery? I used mouseOver and mouseOut events in a web application. Are there any similar events for the iPad's Safari browser since there are no events like mouseOut and mo...

using "if" and "else" Stored Procedures MySQL

I'm having some difficulties when trying to create this stored procedure, any kind of help is welcome: create procedure checando(in nombrecillo varchar(30), in contrilla varchar(30), out resultado int) begin if exists (select * from compas where ...

OSX -bash: composer: command not found

If i type "composer" i get the above error message. I did on my macbook: curl -sS https://getcomposer.org/installer | php sudo mv composer.phar /usr/local/bin/composer to install Composer globally. I had to manually create the /local/bin/compose...

access key and value of object using *ngFor

I am a bit confused about how to get the key and value of an object in angular2 while using *ngFor for iterating over the object. I know in angular 1.x there is a syntax like ng-repeat="(key, value) in demo" but I don't know how to do the same in...

LaTeX Optional Arguments

How do you create a command with optional arguments in LaTeX? Something like: \newcommand{\sec}[2][]{ \section*{#1 \ifsecondargument and #2 \fi} } } Then, I can call it like \sec{Hello} %Output: Hello \sec{Hell...

Make an image follow mouse pointer

I need a rocket to follow the movements of the mouse pointer on my website. This means it should rotate to face the direction of motion, and if possible, accelerate depending on the distance it has to cover. Is this even possible ? jquery perhaps ?...

Disable scrolling in all mobile devices

This sounds like there should be a solution for it all over the internet, but I am not sure why I cannot find it. I want to disable Horizontal scrolling on mobile devices. Basically trying to achieve this: body{ overflow-x:hidden // disable hori...

How to assign a NULL value to a pointer in python?

I am C programmer. I am new to python. In C , when we define the structure of a binary tree node we assign NULL to it's right and left child as : struct node { int val; struct node *right ; struct node *left ; }; And when i...

jQuery: Get selected element tag name

Is there an easy way to get a tag name? For example, if I am given $('a') into a function, I want to get 'a'....

How do I get the number of days between two dates in JavaScript?

How do I get the number of days between two dates in JavaScript? For example, given two dates in input boxes: <input id="first" value="1/1/2000"/> <input id="second" value="1/1/2001"/> <script> alert(datediff("day", first, secon...

Remove 'b' character do in front of a string literal in Python 3

I am new in python programming and i am a bit confused. I try to get the bytes from a string to hash and encrypt but i got b'...' b character in front of string just like the below example. Is any way avoid this?.Can anyone give a solution? Sorry...

Does java have a int.tryparse that doesn't throw an exception for bad data?

Possible Duplicate: Java: Good way to encapsulate Integer.parseInt() how to convert a string to float and avoid using try/catch in java? C# has Int.TryParse: Int32.TryParse Method (String, Int32%) The great thing with this method is tha...

How to Implement DOM Data Binding in JavaScript

Please treat this question as strictly educational. I'm still interested in hearing new answers and ideas to implement this tl;dr How would I implement bi-directional data-binding with JavaScript? Data Binding to the DOM By data binding to the DO...

Compare dates with javascript

I have two dates in javascript: var first = '2012-11-21'; var second = '2012-11-03'; i would like make: if(first > second){ //... } how is the best way for this, without external library?...

How to query a MS-Access Table from MS-Excel (2010) using VBA

I am trying to write some vba code in Excel to query a table in Access. I have tried multiple code samples for this such as the added links and they all seem to fail at the "Open connection" part. I have tried using different references but I'm not s...

How to combine date from one field with time from another field - MS SQL Server

In an extract I am dealing with, I have 2 datetime columns. One column stores the dates and another the times as shown. How can I query the table to combine these two fields into 1 column of type datetime? Dates 2009-03-12 00:00:00.000 2009-03-26 ...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory

Node version is v0.11.13 Memory usage during crash according to sudo top not raises over 3% Code that reproduces this error: var request = require('request') var nodedump = require('nodedump') request.get("http://pubapi.cryptsy.com/api.php?method...

How to return a result from a VBA function

How do I return a result from a function? For example: Public Function test() As Integer return 1 End Function This gives a compile error. How do I make this function return an integer?...

Converting java.sql.Date to java.util.Date

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How to get annotations of a member variable?

I want to know a class's some member variable's annotations , I use BeanInfo beanInfo = Introspector.getBeanInfo(User.class) to introspect a class , and use BeanInfo.getPropertyDescriptors() , to find specific property , and use Class type = property...

How do I download a file with Angular2 or greater

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How can I disable the default console handler, while using the java logging API?

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After adding log4j to my application I get the following output every time I execute my application: log4j:WARN No appenders could be found for logger (slideselector.facedata.FaceDataParser). log4j:WARN Please initialize the log4j system properly. ...

Why can't DateTime.Parse parse UTC date

Why can't it parse this: DateTime.Parse("Tue, 1 Jan 2008 00:00:00 UTC") ...

What do the return values of Comparable.compareTo mean in Java?

What is the difference between returning 0, returning 1 and returning -1 in compareTo() in Java?...

Using Font Awesome icon for bullet points, with a single list item element

We'd like to be able to use a Font Awesome ( http://fortawesome.github.com/Font-Awesome/ ) icon as a bullet point for unordered lists in a CMS. The text editor on the CMS only outputs raw HTML so additional elements/ classes cannot be added. This m...

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I have a global variable that needs to be shared among my ViewControllers. In Objective-C, I can define a static variable, but I can't find a way to define a global variable in Swift. Do you know of a way to do it?...

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Git - What is the difference between push.default "matching" and "simple"

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Hi I want to set table height 100% to its parent div without define height in div. My code is not working. I dont know what I am missing. Fiddle link <div style="overflow:hidden"> <div style="float:left">a<br />b</div> <ta...

Regex date format validation on Java

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VSCode regex find & replace submatch math?

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How to parse JSON to receive a Date object in JavaScript?

I have a following piece of JSON: \/Date(1293034567877)\/ which is a result of this .NET code: var obj = DateTime.Now; var serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); serializer.Serialize(obj).Dump(); Now the prob...

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SQL select max(date) and corresponding value

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

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I'm working on a generative art project where I would like to allow users to save the resulting images from an algorithm. The general idea is: Create an image on an HTML5 Canvas using a generative algorithm When the image is completed, allow users ...

How to import or copy images to the "res" folder in Android Studio?

I can save all my images directly in the res/drawable-xxx folder. But how can I import/copy images to my project from Android Studio? If I drag an drop my images from the Finder (MacOS), the files only move to the res folder. At in the context-me...

What is git tag, How to create tags & How to checkout git remote tag(s)

when I checkout remote git tag use command like this: git checkout -b local_branch_name origin/remote_tag_name I got error like this: error: pathspec `origin/remote_tag_name` did not match any file(s) known to git. I can find remote_tag_name wh...

How to label scatterplot points by name?

I am trying to figure out how to get labels to show on either Google sheets, Excel, or Numbers. I have information that looks like this name|x_val|y_val ---------------- a | 1| 1 b | 2| 4 c | 1| 2 Then I would want my fina...

Java - Check if JTextField is empty or not

So I got know this is a popular question and already found the solution. But when I try this it doesn't work properly. My JTextField is empty and the button isn't enabled. When I write something in my textfield the button doesn't get enabled. So m...

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To use generic types with Spring RestTemplate we need to use ParameterizedTypeReference (Unable to get a generic ResponseEntity<T> where T is a generic class "SomeClass<SomeGenericType>") Suppose I have some class public class...

Why won't bundler install JSON gem?

I get the following error when attempting to run cap production deploy. DEBUG [dc362284] Bundler::GemNotFound: Could not find json-1.8.1.gem for installation DEBUG [dc362284] An error occurred while installing json (1.8.1), and Bundler cannot...

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I'm trying to take a picture with camera, but I'm getting the following error: FATAL EXCEPTION: main Process: com.example.marek.myapplication, PID: 6747 java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/emulat...

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I am trying to understand how the Gradle Wrapper works. In many source repos, I see the following structure: projectRoot/ src/ build.gradle gradle.properties settings.gradle gradlew gradlew.bat gradle/ wrapper/ ...

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Suppose the jQuery object is $target....

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I have a boto3 client : boto3.client('kms') But it happens on new machines, They open and close dynamically. if endpoint is None: if region_name is None: # Raise a more specific error message that will give # ...

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In Unix we can suspend a process execution temporarily and resume it with signals SIGSTOP and SIGCONT. How can I suspend a single-threaded process in Windows without programming ? ...

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I just want to create a regular expression out of any possible string. var usersString = "Hello?!*`~World()[]"; var expression = new RegExp(RegExp.escape(usersString)) var matches = "Hello".match(expression); Is there a built-in ...

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How can I use JavaScript to create and style (and append to the page) a div, with content? I know it's possible, but how?...

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How to set 24-hours format for date on java?

I have been developing Android application where I use this code: Date d=new Date(new Date().getTime()+28800000); String s=new SimpleDateFormat("dd/MM/yyyy hh:mm:ss").format(d); I need to get date after 8 hours from current moment, and I want that...

How do you underline a text in Android XML?

How do you underline a text in an XML file? I can't find an option in textStyle....

How can I count the occurrences of a list item?

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Are PostgreSQL column names case-sensitive?

I have a db table say, persons in Postgres handed down by another team that has a column name say, "first_Name". Now am trying to use PG commander to query this table on this column-name. select * from persons where first_Name="xyz"; And it just r...

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I'm trying to find out why my web application throws a javax.naming.NameNotFoundException: Name [flexeraDS] is not bound in this Context. Unable to find [flexeraDS]. when a sister one from which I'm copying the configuration quietly runs. I have...

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I've read this answer, reducing boilerplate, looked at few GitHub examples and even tried redux a little bit (todo apps). As I understand, official redux doc motivations provide pros comparing to traditional MVC architectures. BUT it doesn't provid...

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I understand that ASP.NET Web API natively uses Json.NET for (de)serializing objects, but is there a way to specify a JsonSerializerSettings object that you want for it to use? For example, what if I wanted to include type information into the seri...

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I can set a radio button to checked fine, but what I want to do is setup a sort of 'listener' that activates when a certain radio button is checked. Take, for example the following code: $("#element").click(function() { $('#radio_button').at...

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Under SQL Server, is there an easy way to filter the output of sp_who2? Say I wanted to just show rows for a certain database, for example....

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I have already researched a lot of site on how can I convert PHP DateTime object to String. I always see "String to DateTime" and not "DateTime to String" PHP DateTime can be echoed, but what i want to process my DateTime with PHP string functions....

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I can't find a place where nodejs log file is stored. Because in my node server I have "Segmentation fault", I want to look at log file for additional info......

Calculate distance in meters when you know longitude and latitude in java

Possible Duplicate: Working with latitude/longitude values in Java Duplicate: Working with latitude/longitude values in Java How do I calculate distance between two latitude longitude points? I need to calculate the distance between two points g...

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According to doc, calendar set() is: http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Calendar.html#set%28int,%20int,%20int%29 set(int year, int month, int date) Sets the values for the calendar fields YEAR, MONTH, and DAY_OF_MONTH. code: ...

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Suddenly when Syncing Gradle, I get this error: WARNING: API 'variant.getJavaCompile()' is obsolete and has been replaced with 'variant.getJavaCompileProvider()'. It will be removed at the end of 2019. For more information, see http...

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Is it possible to auto-format your code in Dreamweaver like in Visual Studio (ctrl+k+d)...

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I've added a new dependency to my POM. Is there a simple command I can run to download this dependency to my repository?...

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I'm trying to use std::min_element and std::max_element to return the min and max elements in a vector of doubles. My compiler doesn't like how I'm currently trying to use them, and I don't understand the error message. I could of course write my o...

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If I'm writing unit tests in python (using the unittest module), is it possible to output data from a failed test, so I can examine it to help deduce what caused the error? I am aware of the ability to create a customized message, which can carry som...

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I have a PHP variable of type Array and I would like find out if it contains a specific value and let the user know that it is there. This is my array: Array ( [0] => kitchen [1] => bedroom [2] => living_room [3] => dining_room) and I...

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In Java, what's the difference between: private final static int NUMBER = 10; and private final int NUMBER = 10; Both are private and final, the difference is the static attribute. What's better? And why?...

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