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Vernie Hessel

Questions by Vernie Hessel

PHP - Detect if a PNG is fully transparent?

I am looking for a fast an reliable way of knowing if a PNG file hosted on an HTTP server is fully transparent (not ...

React prop validation for date objects?

What is the currently preferred way to validate a Date prop in react? Right now I'm using: React.PropTypes.object ...

How to visualize a nonlinear relationship in a scatter plot?

I want to visually explore the relationship between two variables. The functional form of the relationship is not vi...

4d surface graph logistic regression (x,y,z, color)?

I'm trying to plot a 4d surface graph of a binomial relationship involving 4 quantitative variables (3 predictor var...

remote sc OpenSCManager query failed 5 access denied?

I'm writing a script that periodically checks that certain services are running on remote workstations. I'm having ...

Minimal and correct way to map one-to-many with NHibernate?

I am new to NHibernate and C#, so please be gentle! I have the following two NHibernate entities: Employee { p...

DateTime group by date and hour?

I have a datetime called activity_dt and the data looks like this: 2/5/2013 9:24:00 AM 2/7/2013 7:17:00 AM How do...

Android : Decreasing size of the Button?

I am using Button in one of the layouts. I want Button size to be as small as the text/label size. I am using the f...

How to create Excel file in asp.net?

I want to create Excel Sheet in asp.net. I have already done code for this and it is working fine in local system bu...

Detecting Enter keypress on VB.NET?

I am using .NET 3.5 framework of VB.NET 2008. I have some textboxes in my form. I want the tab-like behavior when m...

How to update Identity Column in SQL Server??

I have SQL Server database and I want to change the identity column because it started with a big number 10010 and i...

How do I subtract two arrays?

I have two arrays: A and B. I want to subtract their values, and have the result be stored in array C. Pseudocode: ...

Failed to load resource under Chrome?

There is a bunch of images in a web page. Other browsers are downloading them correctly, but Chrome doesn't loads t...

Convert Factor to Date/Time in R?

This is the information contained within my dataframe: ## minuteofday: factor w/ 89501 levels "2013-06-01 08:07:00"...

Remove HTML Tags in Javascript with Regex?

I am trying to remove all the html tags out of a string in Javascript. Heres what I have... I can't figure out why i...