How to declare an array in Python?
How do I declare an array in Python? I can’t find any reference to arrays in the documentation.
Problem with gif with transparent background
Your gif is disposal = 3 that means it needs previous image as it renders incrementally. The problem is the image is with black background and not white … Here are the disposals possible: When I render it with my decoder it looks like this: [![capture][1]][1] So there are 2 possible things at play here: … Read more
What is an idempotent operation?
In computing, an idempotent operation is one that has no additional effect if it is called more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set. In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the … Read more
How do I select the first row in an R data frame that meets certain criteria?
Sure. Something like this should do the trick: EDIT Also, for those interested in data.table, there is this:
How to add a browser tab icon (favicon) for a website?
There are actually two ways to add a favicon to a website. <link rel=”icon”> Simply add the following code to the <head> element: PNG favicons are supported by most browsers, except IE <= 10. For backwards compatibility, you can use ICO favicons. Note that you don’t have to precede icon in rel attribute with shortcut … Read more
Convert HTML to PDF in .NET
I want to generate a PDF by passing HTML contents to a function. I have made use of iTextSharp for this but it does not perform well when it encounters tables and the layout just gets messy.
Converting bytes to megabytes
Traditionally by megabyte we mean your second option — 1 megabyte = 220 bytes. But it is not correct actually because mega means 1 000 000. There is a new standard name for 220 bytes, it is mebibyte (http://en.wikipedia.org/wiki/Mebibyte) and it gathers popularity.
What does “javascript:void(0)” mean?
The void operator evaluates the given expression and then returns undefined. The void operator is often used merely to obtain the undefined primitive value, usually using “void(0)” (which is equivalent to “void 0”). In these cases, the global variable undefined can be used instead (assuming it has not been assigned to a non-default value). An … Read more
Searching the student-t distribution table for values using python
For a meaningful interpolation, you would first need to define a 2D inperpolation function (bilinear, bicubic). For better resutls directly use the scipy implementations of the percent point function (i.e. the inverse cumulative distribution function). Result is v: 2.57058 so the result is the same as the 2.571 from your table. This code reproduces your … Read more
What does enumerate() mean?
The enumerate() function adds a counter to an iterable. So for each element in cursor, a tuple is produced with (counter, element); the for loop binds that to row_number and row, respectively. Demo: By default, enumerate() starts counting at 0 but if you give it a second integer argument, it’ll start from that number instead: … Read more