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I have a data.frame like this - set.seed(123) df = data.frame(x=sample(0:1,10,replace=T),y= ... I am specifically looking for a solution using dplyr package. Question&Answers:os...

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How to run shell script on host from docker container?

How to control host from docker container? For example, how to execute copied to host bash script? Question&Answers:os...

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c# - Using Excel OleDb to get sheet names IN SHEET ORDER

I'm using OleDb to read from an excel workbook with many sheets. I need to read the sheet names, but I need them ... ASP.NET sites, so I needed to use OLEDB. Question&Answers:os...

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Android: remove notification from notification bar

I have created an application and with an event I manage to add notification in android notification bar. Now ... from notification bar on an event ?? Question&Answers:os...

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operators - javascript i++ vs ++i

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android - How to disable RecyclerView scrolling?

I cannot disable scrolling in the RecyclerView. I tried calling rv.setEnabled(false) but I can still scroll. How can I disable scrolling? Question&Answers:os...

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c++ - Finding all the subsets of a set

I need an algorithm to find all of the subsets of a set where the number of elements in a set is n. S={1,2,3,4...n ... in c++ to find subsets of {1,2,3,4,5} Question&Answers:os...

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android - Cannot get searchview in actionbar to work

I am pretty new to java and android development; and I have been working on an app in which I want an action ... someone was to help me with this! Source code Question&Answers:os...

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java - clone() vs copy constructor vs factory method?

I did a quick google on implementing clone() in Java and found: http://www.javapractices.com/topic/ ... missing something? Any insights would be appreciated. Question&Answers:os...

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android - How to hide Soft Keyboard when activity starts

I have an Edittext with android:windowSoftInputMode="stateVisible" in Manifest. Now the keyboard will be shown when I start the ... ), 0); but it did not work. Question&Answers:os...

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android - Replace selector images programmatically

I have an ImageView that has a drawable image resource set to a selector. How do I programmatically ... replace btn_icon_hl and btn_icon with other images. Question&Answers:os...

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haskell - Applicatives compose, monads don't

Applicatives compose, monads don't. What does the above statement mean? And when is one preferable to other? Question&Answers:os...

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Facebook Access Token for Pages

I have a Facebook Page that I want to get some things from it. First thing are feeds and from what I read ... I clicked but had no access_token in return... Question&Answers:os...

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c# - XmlSerializer giving FileNotFoundException at constructor

An application I've been working with is failing when I try to serialize types. A statement like XmlSerializer lizer = ... my class. How can I fix this problem? Question&Answers:os...

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Is there any overhead to declaring a variable within a loop? (C++)

I am just wondering if there would be any loss of speed or efficiency if you did something like this: int ... are they the same, speedwise and efficiency-wise? Question&Answers:os...

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Explode PHP string by new line

Simple, right? Well, this isn't working :- $skuList = explode(' ', $_POST['skuList']); Question&Answers:os...

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shutil - How do I copy an entire directory of files into an existing directory using Python?

Run the following code from a directory that contains a directory named bar (containing one or more files) and a ... ?) Or is there an easier/better way? Question&Answers:os...

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file permissions - How to read the mode field of git-ls-tree's output

$ git ls-tree fb3a8bdd0ce 100644 blob 63c918c667fa005ff12ad89437f2fdc80926e21c .gitignore 100644 blob ... git user's manual. Question&Answers:os...

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java - Execute method on startup in Spring

Is there any Spring 3 feature to execute some methods when the application starts for the first time? I ... startup, but then it will execute periodically. Question&Answers:os...

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mocking - How do I mock an open used in a with statement (using the Mock framework in Python)?

How do I test the following code with unittest.mock: def testme(filepath): with open(filepath) as f: return f.read() Question&Answers:os...

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android - Show AlertDialog in any position of the screen

When we show an AlertDialog in android it shows in the center of the screen. Is there any way to change the position? Question&Answers:os...

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screen scraping - How to implement a web scraper in PHP?

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javascript - Difference between "change" and "input" event for an `input` element

Can someone tell me what the difference between the change and input events is? I am using jQuery for ... difference in the event ordering relative to focus? Question&Answers:os...

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custom error pages - ASP.NET MVC HandleError

How do I go about the [HandleError] filter in asp.net MVC Preview 5? I set the customErrors in my Web. ... " You should probably check it out too ;) Question&Answers:os...

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c# - Multiple cases in switch statement

Is there a way to fall through multiple case statements without stating case value: repeatedly? I know this ... different language, or am I missing something? Question&Answers:os...

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hash - Is it safe to ignore the possibility of SHA collisions in practice?

Let's say we have a billion unique images, one megabyte each. We calculate the SHA-256 hash for the ... go ignoring this possibility, assuming it is zero? Question&Answers:os...

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java - Different names of JSON property during serialization and deserialization

Is it possible: to have one field in class, but different names for it during serialization/ ... .exc.UnrecognizedPropertyException: Unrecognized field "red" Question&Answers:os...

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Proxy setting for R

I am facing problem while conecting R with internet in my office. May be this due to LAN settings. I tried the ... set LAN proxy settings for XML package in R? Question&Answers:os...

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