“2.7.0_bf4fda703454”.split(“_”) gives a list of strings: This splits the string at every underscore. If you want it to stop after the first split, use “2.7.0_bf4fda703454”.split(“_”, 1). If you know for a fact that the string contains an underscore, you can even unpack the LHS and RHS into separate variables: An alternative is to use partition(). … Read more
For those using Rstudio, I’ve found that setting Sys.setenv(‘R_MAX_VSIZE’=32000000000), as has been suggested on multiple StackOverflow posts, only works on the command line, and that setting that parameter while using Rstudio does not prevent this error: Error: vector memory exhausted (limit reached?) After doing some more reading, I found this thread, which clarifies the problem with Rstudio, and … Read more
cmp arg2, arg1 performs the same operation as sub arg2, arg1 except that none of the operands are modified. The difference is not stored anywhere. However, the flags register is updated and can be used in a conditional jump, like jump-if-equal (JE), most often as the next instruction after the cmp. The advantage over other … Read more
When you open a file with the name address.csv, you are telling the open() function that your file is in the current working directory. This is called a relative path. To give you an idea of what that means, add this to your code: That will print the current working directory along with all the files in it. … Read more
When I try the result gives me a 2-d plot frame with x-axis from 0 to 1. However, when I try using numpy.newaxis to slice a vector, Is it the same thing except that it changes a row vector to a column vector? Generally, what is the use of numpy.newaxis, and in which circumstances should … Read more
You can’t solve it. Simply answer1.sum()==0, and you can’t perform a division by zero. This happens because answer1 is the exponential of 2 very large, negative numbers, so that the result is rounded to zero. nan is returned in this case because of the division by zero. Now to solve your problem you could: go for a library for … Read more
C++ has no built-in concepts of interfaces. You can implement it using abstract classes which contains only pure virtual functions. Since it allows multiple inheritance, you can inherit this class to create another class which will then contain this interface (I mean, object interface 🙂 ) in it. An example would be something like this … Read more
You’re getting this error because you’re trying to add/update a row to table2 that does not have a valid value for the UserID field based on the values currently stored in table1. If you post some more code I can help you diagnose the specific cause.
Ok for the recursive options when deleting files, but what is rimraf? Is it an acronym? Does it come from words combination? The word is fairly pleasant, I would like to know where does it come from.
If I understood it right you are doing an XMLHttpRequest to a different domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different when you want to do a cross-domain request. A tutorial about how to … Read more