Questions Tagged with #Root

On Unix-like systems, a special user account used for system administration.

How to set the context path of a web application in Tomcat 7.0

I know that I can rename my webapp (or it's WAR file) to ROOT but this is a terrible way to do it, IMHO. Now I checked out the tomcat doc & it says It is NOT recommended to place elements di..

How do I get the APK of an installed app without root access?

I'm trying to extract the APK file of an installed Android app WITHOUT root permissions. I thought that this was impossible, because all APK files for non-system-apps are located in /data/app, and ac..

How to get domain root url in Laravel 4?

I'm ready to scream how hard can this be? I've been trying for too long. If I have http://www.example.com/more/pages/page.php or similar I want to be able to get www.example.com. Thats all. So I can..

adb remount permission denied, but able to access super user in shell -- android

so, i'm trying to push some files to /system on android device (zte) I've rooted, connected with ADB, adb remount -> I get permission denied adb shell su -> I'm able to access shell and create folde..

vagrant login as root by default

Problem: frequently the first command I type to my boxes is su -. Question: how do I make vagrant ssh use the root user by default? Version: vagrant 1.6.5..

Import Certificate to Trusted Root but not to Personal [Command Line]

I am trying to import two certificates to my local machine using the command line. I have one certificate to add to the Personal Store of the local machine, and another one to add to the Trusted Root..

SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'

I just installed Ubuntu 16.04 and installed web server on it. Everything works well, but I cannot access database. Even if I create new user and grant all privileges, I can't create database In PHP I'..

Root user/sudo equivalent in Cygwin?

I'm trying to run a bash script in Cygwin. I get Must run as root, i.e. sudo ./scriptname errors. chmod 777 scriptname does nothing to help. I've looked for ways to imitate sudo on Cygwin, to..

Access Denied for User 'root'@'localhost' (using password: YES) - No Privileges?

I am continuously receiving this error. I am using mySQL Workbench and from what I am finding is that root's schema privileges are null. There are no privileges at all. I am having troubles across p..

MySQL user DB does not have password columns - Installing MySQL on OSX

I am trying to change MySql root password. What I have done is below. Install MySql-5.7.6 ~ .dmg(Community Server) and workbench. Turn off the server on OSX System preferences. Access MySql with co..

How to restart adb from root to user mode?

Basic question on ADB. adb root restarts adb as root. But what i want is to restart it back to user after some time. I tried the following : adb kill-server adb start-server doesnt work.. ps -A ..

Connect to docker container as user other than root

BY default when you run docker run -it [myimage] OR docker attach [mycontainer] you connect to the terminal as root user, but I would like to connect as a different user. Is this possible? ..

How to get root access on Android emulator?

I have All Android SDK versions(from 1.5 to 2.3.3), and I tried many methods for getting root in Android emulator. I don't use any Android device and test everything on emulator(AVD). I need to get r..

Android: adbd cannot run as root in production builds

I have an Android-based phone (2.3.6) with unlocked root privileges. Since i'd like to have access to my phone through my computer, today i've installed QtAdb and Android SDK. If i open a command prom..

Viewing root access files/folders of android on windows

I'm trying to view the files and folders at root level on an android device using USB Debugging mode and windows. Is this possible? Phone is rooted. I've downloaded a file explorer app which allows m..

Is there a way for non-root processes to bind to "privileged" ports on Linux?

It's very annoying to have this limitation on my development box, when there won't ever be any users other than me. I'm aware of the standard workarounds, but none of them do exactly what I want: a..

How to check if running as root in a bash script

I'm writing a script that requires root level permissions, and I want to make it so that if the script is not run as root, it simply echoes "Please run as root." and exits. Here's some pseudocode for..

How to parse a String containing XML in Java and retrieve the value of the root node?

I have XML in the form of a String that contains <message>HELLO!</message> How can I get the String "Hello!" from the XML? It should be ridiculously easy but I am lost. The XML isn't ..

phpMyAdmin - can't connect - invalid setings - ever since I added a root password - locked out

I run XAMPP, a few days back i had set up a password for the root password through phpmyadmin I am not able to access phpMyAdmin ever since that moment I followed help on this link but everything see..

MySQL root password change

I have been trying to reset my MySQL root password. I have run the mysqld_safe --skip-grant-tables, updated the root password, and checked the user table to make sure it is there. Once restarting th..

Document Root PHP

Just to confirm, is using: $_SERVER["DOCUMENT_ROOT"] the same as using: / in HTML. Eg. If current document is: folder/folder/folder/index.php I could use (in HTML) to start at the roort: /som..

A terminal command for a rooted Android to remount /System as read/write

I'm writing an android app that needs to copy a file to the "/system" partition at runtime. I've got the commands to run "su" and can successfully request SuperUser permissions and run commands as roo..

Determine if running on a rooted device

My app has a certain piece of functionality that will only work on a device where root is available. Rather than having this feature fail when it is used (and then show an appropriate error message to..

adb shell su works but adb root does not

I rooted my unlocked Galaxy S3 (SGH-T999) Now, I'm trying to run adb root from Windows Command Prompt, however, I'm getting adbd cannot run as root in production builds error. So, the very first thin..

sql like operator to get the numbers only

This is I think a simple problem but not getting the solution yet. I would like to get the valid numbers only from a column as explained here. Lets say we have a varchar column with following values ..

How to hide 'Back' button on navigation bar on iPhone?

I added a navigation control to switch between views in my app. But some of the views shouldn't have 'Back' (the previous title) button. Any ideas about how to hide the back button?..

Android- Error:Execution failed for task ':app:transformClassesWithDexForRelease'

The Problem is that i am able to run my app when i change to debug mode but it fails when i switch to release mode. Exception: **FAILURE: Build failed with an exception.** > Execution failed for ..

Decode JSON with unknown structure

I want to get a string that represents a json like this one: { "votes": { "option_A": "3" } } and include a "count" key in it so it ends like this: { "vot..

cpp / c++ get pointer value or depointerize pointer

I was wondering if it's possible to make a pointer not a pointer.. The problem is I have a function that accepts a pointer for an paramater for me to easily get a value to that pointer. It's a simple..

Using Ansible set_fact to create a dictionary from register results

In Ansible I've used register to save the results of a task in the variable people. Omitting the stuff I don't need, it has this structure: { "results": [ { "item": { ..

Can I stretch text using CSS?

Can I stretch text in CSS? I don't want the font to be bigger, because that makes it appear bolder than smaller text beside it. I just want to stretch the text vertically so it's kind of deformed. Th..

How many spaces will Java String.trim() remove?

In Java, I have a String like this: " content ". Will String.trim() remove all spaces on these sides or just one space on each?..

How to reformat JSON in Notepad++?

I need Notepad++ to take a json string from this {"menu": {"id": "file","value": "File","popup": {"menuitem": [{"value": "New", "onclick": "CreateNewDoc()"},{"value": "Open", "onclick": "OpenDoc()"},..

PHP save image file

Possible Duplicate: Saving image from PHP URL I have an image as a url link from the 3rd party web thumb site (IE http://images.websnapr.com/?size=size&key=Y64Q44QLt12u&url=http://g..

Find the host name and port using PSQL commands

I have PSQL running, and am trying to get a perl application connecting to the database. Is there a command to find the current port and host that the database is running on?..

What is the (best) way to manage permissions for Docker shared volumes?

I've been playing around with Docker for a while and keep on finding the same issue when dealing with persistent data. I create my Dockerfile and expose a volume or use --volumes-from to mount a host..

" netsh wlan start hostednetwork " command not working no matter what I try

C:\Windows\system32>netsh wlan show drivers Interface name: Wireless Network Connection Driver : DW1501 Wireless-N WLAN Half-Mini Card Vendor : Broadcom Provid..

How to stop process from .BAT file?

So I have process I started from one bat file. How to stop it from another?..

What does $@ mean in a shell script?

What does a dollar sign followed by an at-sign (@) mean in a shell script? For example: umbrella_corp_options $@ ..

How to update/modify an XML file in python?

I have an XML document that I would like to update after it already contains data. I thought about opening the XML file in "a" (append) mode. The problem is that the new data will be written after th..

PHP Parse error: syntax error, unexpected end of file in a CodeIgniter View

I am getting an unexpected end of file error on my CodeIgniter View. I have pasted the PHP code at http://codepad.org/S12oXE4t. This code passed various online PHP syntax tests, but I don't know why..

Clicking at coordinates without identifying element

As part of my Selenium test for a login function, I would like to click a button by identifying its coordinates and instructing Selenium to click at those coordinates. This would be done without ident..

Proper Linq where clauses

I write a fair amount of linq in my day to day life, but mostly simple statements. I have noticed that when using where clauses, there are many ways to write them and each have the same results as fa..

Returning multiple values from a C++ function

Is there a preferred way to return multiple values from a C++ function? For example, imagine a function that divides two integers and returns both the quotient and the remainder. One way I commonly ..

async for loop in node.js

I am new to this node.js ..I am little bit confused about this callback..In my app inside a for loop i am calling a asynchronous function call,i think my problem is that before i am getting response o..

How to get "their" changes in the middle of conflicting Git rebase?

I have conflicting branches, branch2 branched from branch1. Let's say when rebasing branch2 on current branch1, while resolving conflicts, I decide to take some (not all) of "their" (i.e. branch1) fi..

How do I get the position selected in a RecyclerView?

I am experimenting with the support library's recyclerview and cards. I have a recyclerview of cards. Each card has an 'x' icon at the top right corner to remove it: The card xml, list_item.xml: &..

How to use Selenium with Python?

How do I set up Selenium to work with Python? I just want to write/export scripts in Python, and then run them. Are there any resources for that? I tried googling, but the stuff I found was either ref..

how to increment integer Columns value by 1 in SQL

My questions is how to increment a column's value by 1. For example, suppose a column ID has values 1,2,3,4, .. Now when I update this table then ID column should increment by 1, Now ID will b..

Find the differences between 2 Excel worksheets?

I have two excel files with the same structure: they both have 1 column with data. One has 800 records and the other has 805 records, but I am not sure which of the 5 in the 805 set are not in the 8..

JDBC ResultSet: I need a getDateTime, but there is only getDate and getTimeStamp

I would like to get the DATETIME column from an Oracle DB Table with JDBC. Here is my code: int columnType = rsmd.getColumnType(i); if(columnType == Types.DATE) { Date aDate = rs.getDate(i); ..

Matplotlib figure facecolor (background color)

Can someone please explain why the code below does not work when setting the facecolor of the figure? import matplotlib.pyplot as plt # create figure instance fig1 = plt.figure(1) fig1.set_figheight..

TensorFlow not found using pip

I'm trying to install TensorFlow using pip: $ pip install tensorflow --user Collecting tensorflow Could not find a version that satisfies the requirement tensorflow (from versions: ) No matching dist..

What does 'super' do in Python?

What's the difference between: class Child(SomeBaseClass): def __init__(self): super(Child, self).__init__() and: class Child(SomeBaseClass): def __init__(self): SomeBaseCl..

INSTALL_FAILED_DUPLICATE_PERMISSION... C2D_MESSAGE

I am using Google notifications in my app, and until now I have done below in the manifest: <!-- GCM --> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <!-- GCM req..

Reading/parsing Excel (xls) files with Python

What is the best way to read Excel (XLS) files with Python (not CSV files). Is there a built-in package which is supported by default in Python to do this task?..

What is the best IDE for PHP?

I'm a PHP developer and now I use Notepad++ for code editing, but lately I've been searching for an IDE to ease my work. I've looked into Eclipse, Aptana Studio and several others, but I'm not really..

Video auto play is not working in Safari and Chrome desktop browser

I spent quite a lot of time trying to figure out why video embedded like here: <video height="256" loop autoplay muted controls id="vid"> <source type="video/mp4" src="video_file.mp..

How to save all files from source code of a web site?

I want to download all files (html, images, js, css) from one website. I can download each and every file separately. I tried in Google Chrome, after clicking on the view source, then ctrl + s then ..

How to convert an entire MySQL database characterset and collation to UTF-8?

How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?..

Download a single folder or directory from a GitHub repo

How can I download only a specific folder or directory from a remote Git repo hosted on GitHub? Say the example GitHub repo lives here: [email protected]:foobar/Test.git Its directory structure: Tes..

How to iterate over each string in a list of strings and operate on it's elements

Im new to python and i need some help with this. TASK : given a list --> words = ['aba', 'xyz', 'xgx', 'dssd', 'sdjh'] i need to compare the first and the last element of each string in the list, ..

Calculating the position of points in a circle

I'm having a bit of a mind blank on this at the moment. I've got a problem where I need to calculate the position of points around a central point, assuming they're all equidistant from the center and..

Play infinitely looping video on-load in HTML5

I'm looking to place a video in an HTML5 page that will begin playing on page-load, and once completed, loop back to the beginning without a break. The video should also NOT have any controls associat..

Test if a variable is a list or tuple

In python, what's the best way to test if a variable contains a list or a tuple? (ie. a collection) Is isinstance() as evil as suggested here? http://www.canonical.org/~kragen/isinstance/ Update: th..

Execute multiple command lines with the same process using .NET

I'm trying to execute multiple commands without create a new process each time. Basically, I want to start the DOS command shell, switch to the MySQL command shell, and execute a command. Here's how I..

Java Multiple Inheritance

In an attempt to fully understand how to solve Java's multiple inheritance problems I have a classic question that I need clarified. Lets say I have class Animal this has sub classes Bird and Horse a..

Sublime Text 2 multiple line edit

I want to edit multiple lines and every "word" within that line. For example: 45 28 42 65 24 87 47 95 01 25 87 98 I want to select every whole number in all lines and put a "0x" before it so it wou..

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..

Difference between setTimeout with and without quotes and parentheses

I am learning JavaScript and I have learned recently about JavaScript timing events. When I learned about setTimeout at W3Schools, I noticed a strange figure which I didn’t run into before. They are..

z-index not working with fixed positioning

I have a div with default positioning (i.e. position:static) and a div with a fixed position. If I set the z-indexes of the elements, it seems impossible to make the fixed element go behind the static..

How do I output an ISO 8601 formatted string in JavaScript?

I have a Date object. How do I render the title portion of the following snippet? <abbr title="2010-04-02T14:12:07">A couple days ago</abbr> I have the "relative time in words" portion ..

How to stick <footer> element at the bottom of the page (HTML5 and CSS3)?

When I use position relative with no content, footer goes up, with absolute with a lot of content, the footer goes down, and with fixed it is always there. Is there a easy way to get at the end of t..

TCPDF not render all CSS properties

I try to make a PDF writing CSS and HTML but my CSS doesn't appear in my PDF. The only thing considered is the font-size and font-color. I give you the code (sorry, it's a little long...) $config = ..

Iterating through a list to render multiple widgets in Flutter?

I have a list of strings defined like this: var list = ["one", "two", "three", "four"]; I want to render the values on the screen side by side using text widgets. I have attempted to use the follo..

Write to .txt file?

How can I write a little piece of text into a .txt file? I've been Googling for over 3-4 hours, but can't find out how to do it. fwrite(); has so many arguments, and I don't know how to use it. What..

How can I get the sha1 hash of a string in node.js?

I'm trying to create a websocket server written in node.js To get the server to work I need to get the SHA1 hash of a string. What I have to do is explained in Section 5.2.2 page 35 of the docs. ..

How to calculate percentage with a SQL statement

I have a SQL Server table that contains users & their grades. For simplicity's sake, lets just say there are 2 columns - name & grade. So a typical row would be Name: "John Doe", Grade:"A". I..

How to fix Ora-01427 single-row subquery returns more than one row in select?

When i execute the following query, i get the message like "Ora-01427 single-row subquery returns more than one row" SELECT E.I_EmpID AS EMPID, E.I_EMPCODE AS EMPCODE, E.I_EmpName..

Drawing circles with System.Drawing

I have this code that draws a Rectangle ( Im trying to remake the MS Paint ) case "Rectangle": if (tempDraw != null) { tempDraw = (Bitmap)snapshot...

Export SQL query data to Excel

I have a query that returns a very large data set. I cannot copy and paste it into Excel which I usually do. I have been doing some research on how to export directly to an Excel sheet. I am running S..

Remove all multiple spaces in Javascript and replace with single space

How can I automatically replace all instances of multiple spaces, with a single space, in Javascript? I've tried chaining some s.replace but this doesn't seem optimal. I'm using jQuery as well, in c..

Java properties UTF-8 encoding in Eclipse

I've recently had to switch encoding of webapp I'm working on from ISO-xx to utf8. Everything went smooth, except properties files. I added -Dfile.encoding=UTF-8 in eclipse.ini and normal files work f..

How to convert milliseconds into human readable form?

I need to convert an arbitrary amount of milliseconds into Days, Hours, Minutes Second. For example: 10 Days, 5 hours, 13 minutes, 1 second...

Python - IOError: [Errno 13] Permission denied:

I'm getting IOError: [Errno 13] Permission denied and I don't know what is wrong wit this code. I'm trying to read a file given an absolute path (meaning only file.asm), and a relative path (meaning..

How to use Comparator in Java to sort

I learned how to use the comparable but I'm having difficulty with the Comparator. I am having a error in my code: Exception in thread "main" java.lang.ClassCastException: New.People cannot be cast ..

TypeError: 'undefined' is not a function (evaluating '$(document)')

I'm using a WordPress site. I'm including this script in the header. When the script loads, I get this error: TypeError: 'undefined' is not a function (evaluating '$(document)') I have no ide..

Split string based on regex

What is the best way to split a string like "HELLO there HOW are YOU" by upper case words (in Python)? So I'd end up with an array like such: results = ['HELLO there', 'HOW are', 'YOU'] EDIT: I..

Algorithm for solving Sudoku

I want to write a code in python to solve a sudoku puzzle. Do you guys have any idea about a good algorithm for this purpose. I read somewhere in net about a algorithm which solves it by filling the w..

Spell Checker for Python

I'm fairly new to Python and NLTK. I am busy with an application that can perform spell checks (replaces an incorrectly spelled word with the correct one). I'm currently using the Enchant library on P..

When to use reinterpret_cast?

I am little confused with the applicability of reinterpret_cast vs static_cast. From what I have read the general rules are to use static cast when the types can be interpreted at compile time hence t..

Update MySQL version from 5.1 to 5.5 in CentOS 6.2

I tried to update MySQL from 5.1 to 5.5 in CentOS 6.2. The following is the process I did: 1. rpm -Uvh http://repo.webtatic.com/yum/centos/5/latest.rpm 2. yum install libmysqlclient15 --enablerepo=we..

How do I install PHP cURL on Linux Debian?

How do I install PHP cURL on Linux Debian? I tried the following code and got the error below apt-get update apt-get install curl libcurl3 php5-curl Error: W: Failed to fetch http://zm.archive.ub..

Pip install Matplotlib error with virtualenv

I am trying to install matplotlib in a new virtualenv. When I do: pip install matplotlib or pip install http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.1.0/matplotlib-1..

Application Installation Failed in Android Studio

Yesterday my app was running perfect from Android Studio but today when I started working on my app and running it i am getting error message continuously Installation failed with message Failed t..

Match linebreaks - \n or \r\n?

While writing this answer, I had to match exclusively on linebreaks instead of using the s-flag (dotall - dot matches linebreaks). The sites usually used to test regular expressions behave differen..

OpenCV - DLL missing, but it's not?

I am trying just a basic program with OpenCV with the following code: #include "cv.h" #include "highgui.h" int main() { IplImage* newImg; newImg = cvLoadImage("~/apple.bmp", 1); cvNamedW..

PHP PDO: charset, set names?

I had this previously in my normal mysql_* connection: mysql_set_charset("utf8",$link); mysql_query("SET NAMES 'UTF8'"); Do I need it for the PDO? And where should I have it? $connect = new PDO("m..

Showing alert in angularjs when user leaves a page

I'm an angularjs new bee. I'm trying to write a validation which alerts the user when he tries to close the browser window. I have 2 links on my page v1 and v2.When clicked on the links it takes to t..

Using HTML5/Canvas/JavaScript to take in-browser screenshots

Google's "Report a Bug" or "Feedback Tool" lets you select an area of your browser window to create a screenshot that is submitted with your feedback about a bug. Screenshot by Ja..

jQuery autocomplete tagging plug-in like StackOverflow's input tags?

What solutions accomplish the same auto-completion that SO uses for entering tags? There are plugins that can handle one word but I haven't seen any that handle multiple words...

How to use <sec:authorize access="hasRole('ROLES)"> for checking multiple Roles?

I want to display some content conditionally based on Roles using Spring Security JSP taglibs. But in Spring Security 3.1.x is checking for only one role. I can use but ifAllGranted is deprecated. ..

Sharing a URL with a query string on Twitter

I'm trying to put a Twitter share link in an email. Because this is in an email I can't rely on JavaScript, and have to use the "Build Your Own" Tweet button. For example, sharing a link to..

Bootstrap 3 collapse accordion: collapse all works but then cannot expand all while maintaining data-parent

I'm using Bootstrap 3 and trying to setup the following accordion/collapse structure: Onload: Each accordion panel in a group is fully collapsed and functions as documented/expected. Button click: E..

md-table - How to update the column width

I have started using the md-table for my project, and I want fixed column width. Currently all columns width are divided into equal size. Where can I get the documentation of data table dimensions? ..

Exception : javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated

public HttpClientVM() { BasicHttpParams params = new BasicHttpParams(); ConnManagerParams.setMaxTotalConnections(params, 10); HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1); ..

String to object in JS

I have a string as string = "firstName:name1, lastName:last1"; now I need one object obj such that obj = {firstName:name1, lastName:last1} How can I do this in JS?..

How to add a filter class in Spring Boot?

I wonder, if there is any annotation for a Filter class (for web applications) in Spring Boot? Perhaps @Filter? I want to add a custom filter in my project. The Spring Boot Reference Guide mentione..

HRESULT: 0x800A03EC on Worksheet.range

I am getting HRESULT: 0x800A03EC on Worksheet.range method. Number of rows are more than 70K. Office 2007. Code: Microsoft.Office.Interop.Excel.Range neededRange = currentWS.Range[cell.Cells[1, ..

How to set environment variables in Jenkins?

I would like to be able to do something like: AOEU=$(echo aoeu) and have Jenkins set AOEU=aoeu. The Environment Variables section in Jenkins doesn't do that. Instead, it sets AOEU='$(echo aoeu)'. ..

How to delete the top 1000 rows from a table using Sql Server 2008?

I have a table in SQL Server. I would like to delete the top 1000 rows from it. However, I tried this, but I instead of just deleting the top 1000 rows it deleted all the rows in the table. Here is..

Manifest merger failed : uses-sdk:minSdkVersion 14

Since downloading the latest SDK and installing Android Studio, my project fails to build. I get the following message: Error:Gradle: Execution failed for task ':SampleProject:processProdDebugManifes..

load Js file in HTML

My first PhoneGap application includes 2 HTML files. The first one is named index.html which uses index.js. This file will display a list item. When I click an item in that list, it brings me to det..

html script src="" triggering redirection with button

i have the following login.html page for login located in design folder. <html> <head> <title>Login Page</title> <script src="../Script/login.js"> </script&..

How to debug a stored procedure in Toad?

I have Oracle 10g installed and there is a package which has a number of cursors and procedures, how do I debug one of these procedures or cursors. Can you please provide steps for that? I ran a Goog..

What do 3 dots next to a parameter type mean in Java?

What do the 3 dots following String in the following method mean? public void myMethod(String... strings){ // method body } ..

How to count TRUE values in a logical vector

In R, what is the most efficient/idiomatic way to count the number of TRUE values in a logical vector? I can think of two ways: z <- sample(c(TRUE, FALSE), 1000, rep = TRUE) sum(z) # [1] 498 tabl..

Interface defining a constructor signature?

It's weird that this is the first time I've bumped into this problem, but: How do you define a constructor in a C# interface? Edit Some people wanted an example (it's a free time project, so yes, it..

How do I convert a calendar week into a date in Excel?

I have a week number and a year, and would like to calculate the date of the Monday for that specific week in Microsoft Excel. Year Week Date (Monday) 2012 1 January 2, 2012 2013 16 ..

Construct a manual legend for a complicated plot

I cannot figure out how to manually set up a legend for this plot. All I really want is a simple legend to the right that uses the three colors and has a name next to each. The current code looks l..

Execute action when back bar button of UINavigationController is pressed

I need to execute an action (emptying an array), when the back button of a UINavigationController is pressed, while the button still causes the previous ViewController on the stack to appear. How coul..

How to build a query string for a URL in C#?

A common task when calling web resources from a code is building a query string to including all the necessary parameters. While by all means no rocket science, there are some nifty details you need t..

Jenkins pipeline if else not working

I am creating a sample jenkins pipeline, here is the code. pipeline { agent any stages { stage('test') { steps { sh 'echo hello' } ..

In Perl, how can I concisely check if a $variable is defined and contains a non zero length string?

I currently use the following Perl to check if a variable is defined and contains text. I have to check defined first to avoid an 'uninitialized value' warning: if (defined $name && length $n..

Does adding a duplicate value to a HashSet/HashMap replace the previous value

Please consider the below piece of code: HashSet hs = new HashSet(); hs.add("hi"); -- (1) hs.add("hi"); -- (2) hs.size() will give 1 as HashSet doesn't allow duplicates so only one element will be ..

How to use mouseover and mouseout in Angular 6

I have this older Angular code which works but not in the latest version of Angular 6. <div ng-mouseover="changeText=true" ng-mouseleave="changeText=false" ng-init="changeText=false"> <spa..

How to get all possible combinations of a list’s elements?

I have a list with 15 numbers in, and I need to write some code that produces all 32,768 combinations of those numbers. I've found some code (by Googling) that apparently does what I'm looking for, ..

Select columns from result set of stored procedure

I have a stored procedure that returns 80 columns, and 300 rows. I want to write a select that gets 2 of those columns. Something like SELECT col1, col2 FROM EXEC MyStoredProc 'param1', 'param2' ..

IF formula to compare a date with current date and return result

I'm looking for a formula which allows me to look at a cell and check if it greater than or equal to today's date and to return a worded result such as "overdue". If it is blank to return another word..

jQuery: outer html()

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