How to write trycatch in R

Well then: welcome to the R world 😉 Here you go Setting up the code Applying the code Investigating the output Additional remarks tryCatch tryCatch returns the value associated to executing expr unless there’s an error or a warning. In this case, specific return values (see return(NA) above) can be specified by supplying a respective handler function (see arguments error and warning in ?tryCatch). These … Read more

How to remove .html from URL?

You can’t (usefully) compare strings using != or ==, you need to use strcmp: The reason for this is because != and == will only compare the base addresses of those strings. Not the contents of the strings themselves.

How do I properly compare strings in C?

You can’t (usefully) compare strings using != or ==, you need to use strcmp: The reason for this is because != and == will only compare the base addresses of those strings. Not the contents of the strings themselves.

C++ round a double up to 2 decimal places

I am having trouble rounding a GPA double to 2 decimal places. (ex of a GPA needed to be rounded: 3.67924) I am currently using ceil to round up, but it currently outputs it as a whole number (368) here is what I have right now using the above code with 3.67924 would output 368 … Read more

the use of `%3F` in URL

First, you should elaborate your question to understand it better after all If I understood it correctly then this might be the answer. “_” is not a reserved URI character. As you said that %3F is reserved for “?” then you are absolutely right but if you read the documentation written on wiki states that … Read more

How to find all occurrences of a substring?

There is no simple built-in string function that does what you’re looking for, but you could use the more powerful regular expressions: #[0, 5, 10, 15] If you want to find overlapping matches, lookahead will do that: If you want a reverse find-all without overlaps, you can combine positive and negative lookahead into an expression like this: #[1] … Read more