Default constructors in Java

Default constructors in Java

I know I'm asking some serious 101 question here...I have some class Foo and a class Bar that extends Foo. In Foo I have a constructor that takes a set of parameters that it sets to its fields. Deriving classes such as Bar will typically no

Specifying dtype float32 with pandas.read_csv on pandas 0.10.1

Specifying dtype float32 with pandas.read_csv on pandas 0.10.1

I'm attempting to read a simple space-separated file with pandas read_csv method. However, pandas doesn't seem to be obeying my dtype argument. Maybe I'm incorrectly specifying it?I've distilled down my somewhat complicated call to read_c

Histogram matching of two Images without using histeq

Histogram matching of two Images without using histeq

It is well known that histeq in MATLAB can perform histogram matching so that an image's histogram is transformed to look like another histogram. I am trying to perform this same operation without using histeq. I'm aware that you need to

disturbing artifacts in pdf

disturbing artifacts in pdf

I'm struggling with a problem when making plots with filledcurves. Between the filled areas, there seems to be a "gap". However, these artifacts do not appear on the print, but depend on the viewer and zoom-options. In Gnuplot I use the eps

How to use “cast” in reshape without aggregation

How to use “cast” in reshape without aggregation

In many uses of cast I've seen, an aggregation function such as mean is used.How about if you simply want to reshape without information loss.For example, if I want to take this long format:ID condition ValueJohn a 2John

Define DataGridView Column type Programmatically

Define DataGridView Column type Programmatically

I need a way in which I can define the column type at run-time.Here is my code:foreach (DataGridViewColumn column in this.dataGrid.Columns){???//i.e. column.type = checkbox}How can I define the column type in this foreach loop? 1:I'm no

calculate flv video file length ? using pure php

calculate flv video file length ? using pure php

What is the best way to calculate the length of flv file using php with out external dependencies like ffmpege because client site run on shared hosting, itry http://code.google.com/p/flv4php/, but it extract metadata and not all video c

Exclude specific time periods in R

Exclude specific time periods in R

I'm a beginner with R and have tried searching for data extraction for certain time periods but can't seem to find anything.I have a time series of continuous data measured at 10 minute intervals for a period of five months. For simplicity'

jQuery: Changing the CSS on an element loaded with ajax?

jQuery: Changing the CSS on an element loaded with ajax?

I need to change the position of an element i'm loading with ajax. I want to use .css() to change it but jQuery can't find the element cause it's not being recognized. How do i do to make jQuery "recognize" the element?I've read about live(

Access variable from code behind via javascript

Access variable from code behind via javascript

I have the following code that I want to return to a variable "t" in javascript:Code behind:Public Shared Function GetSomeText() As String Dim result = "This is from code behind" Return resultEnd FunctionCaller variable in javascript://Th

excel function to find last number in column

excel function to find last number in column

I record the value of my stocks each day in columns and it is a long spreadsheet. In the top cell of each column, I want to use a function that will display the last entry in the column automatically. I've tried the Index function and the

Why can't I unsubscribe from an Event Using a Lambda Expression?

Why can't I unsubscribe from an Event Using a Lambda Expression?

This article states You Can’t Unsubscribe from an Event Using a Lambda Expression.E.g. you can subscribe as follows:d.Barked += (s, e) => Console.WriteLine("Bark: {0}", e);but you can't unsubscribe like this:d.Barked -= (s, e) => Console.Wr

Set height of  = to height of another  through .css

Set height of = to height of another through .css

I have two elements on this site. It's a site I'm developing, and is a work in progress, but some of the design choices I'd like to finalize tonight. Right now my simplified .css is thus:#leftdiv { /*this is the navigation pane*/ min

memcpy(), what should the value of the size parameter be?

memcpy(), what should the value of the size parameter be?

I want to copy an int array to another int array. They use the same define for length so they'll always be of the same length.What are the pros/cons of the following two alternatives of the size parameter to memcpy()?memcpy(dst, src, ARRAY_

Qt event loop and unit testing?

Qt event loop and unit testing?

I'we started experimenting with unit testing in Qt and would like to hear comments on a scenario that involves unit testing signals and slots.Here is an example:The code i would like to test is (m_socket is a pointer to QTcpSocket):void Com

Deciding to use Core Data or NSUserDefaults

Deciding to use Core Data or NSUserDefaults

I have a feature on my app that allows users to invite their friends (via facebook, or friends in their address book). Most people will have NSUserDefaults to store this information. I am wondering if NSUserDefaults will suffice for this, o

What is saved in a context switch?

What is saved in a context switch?

What is exactly saved and restored in a context switch between two threadsin the same processbetween two processes 1:This is rather a complex question since the answer(s) are dependent on many things:The CPU in question It can vary signi

How do I get the key values from $_POST?

How do I get the key values from $_POST?

echo $_POST["name"]; //returns the value a user typed into the "name" fieldI would like to be able to also return the text of the key. In this example, I want to return the text "name". Can I do this? 1:Check out the array_keys() functio

How long does a batch file take to execute?

How long does a batch file take to execute?

How can I write a script to calculate the time the script took to complete?I thought this would be the case, but obviously [email protected] offset starttime=%time%set endtime=%time%REM do stuff hereset /a runtime=%endtime%-%starttime%echo Script

Converting pandas.tslib.Timestamp to datetime python

Converting pandas.tslib.Timestamp to datetime python

I have a df time series. I extracted the indexes and want to convert them each to datetime. How do you go about doing that? I tried to use pandas.to_datetime(x) but it doesn't convert it when I check after using type() 1:Just try to_date

Iterate through Python dictionary by Keys in sorted order

Iterate through Python dictionary by Keys in sorted order

I have a dictionary in Python that looks like this:D = {1:'a', 5:'b', 2:'a', 7:'a'}The values of the keys are mostly irrelevant. Is there are way to iterate through the dictionary by keys in numerical order? The keys are all integers.Instea

How can I display a specific folder in Android Gallery3D (cooliris)?

How can I display a specific folder in Android Gallery3D (cooliris)?

I'm using Gallery3D (froyo-stable)I'm trying to make a little app that displays only images from a specific folder in a gallery view.Uri targetUri = Media.EXTERNAL_CONTENT_URI;String folderPath = Environment.getExternalStorageDirectory().to

How to read multiple excel sheets in R programming? [closed]

How to read multiple excel sheets in R programming? [closed]

I have an excel file which contains 400 sheets. How can I load this excel file to R using read.xls function? Please provide sample code for this. 1:I'm just assuming you want it as all one data.frame() and that all the sheets contain the

git commit to all branches

git commit to all branches

If I fixed a bug in a file in branch branch_a, which should be applied to all branches. Is there a way to apply the change to all branches without having to checkout the branches individually.git commit -m 'commit msg' # on branch a git che

Wildcard searching and highlighting with Solr 1.4

Wildcard searching and highlighting with Solr 1.4

I've got a pretty much vanilla install of SOLR 1.4 apart from a few small config and schema changes. dismax explicit text default false false 1 The main field t