How to reload a page using JavaScript
How can I reload the page using JavaScript? I need a method that works in all browsers.
How can I safely create a nested directory in Python?
On Python ≥ 3.5, use pathlib.Path.mkdir: For older versions of Python, I see two answers with good qualities, each with a small flaw, so I will give my take on it: Try os.path.exists, and consider os.makedirs for the creation. As noted in comments and elsewhere, there’s a race condition – if the directory is created … Read more
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
On groupby object, the agg function can take a list to apply several aggregation methods at once. This should give you the result you need:
C++ Cout & Cin & System “Ambiguous” [closed]
This kind of thing doesn’t just magically happen on its own; you changed something! In industry we use version control to make regular savepoints, so when something goes wrong we can trace back the specific changes we made that resulted in that problem. Since you haven’t done that here, we can only really guess. In … Read more
Cross-Origin Read Blocking (CORB)
I have called third party API using Jquery AJAX. I am getting following error in console: Cross-Origin Read Blocking (CORB) blocked cross-origin response MY URL with MIME type application/json. See https://www.chromestatus.com/feature/5629709824032768 for more details. I have used following code for Ajax call : When I checked in Fiddler, I have got the data in response … Read more
What is the effect of extern “C” in C++?
extern “C” makes a function-name in C++ have C linkage (compiler does not mangle the name) so that client C code can link to (use) your function using a C compatible header file that contains just the declaration of your function. Your function definition is contained in a binary format (that was compiled by your … Read more
How to add new line in Markdown presentation?
See the original markdown specification (bold mine): The implication of the “one or more consecutive lines of text” rule is that Markdown supports “hard-wrapped” text paragraphs. This differs significantly from most other text-to-HTML formatters (including Movable Type’s “Convert Line Breaks” option) which translate every line break character in a paragraph into a <br /> tag. … Read more
Using getline() with file input in C++
getline, as it name states, read a whole line, or at least till a delimiter that can be specified. So the answer is “no”, getlinedoes not match your need. But you can do something like:
What does %>% mean in R [duplicate]
The infix operator %>% is not part of base R, but is in fact defined by the package magrittr (CRAN) and is heavily used by dplyr (CRAN). It works like a pipe, hence the reference to Magritte’s famous painting The Treachery of Images. What the function does is to pass the left hand side of … Read more
How to print in C
Very much a beginner to C, in fact this is my first tester program. I can’t actually figure out how to print this number out to the terminal. I am sure that in Java I could just replace the printf with System.out and it would have worked. I tried searching the answer earlier but if … Read more