How to solve could not create the virtual machine error of Java Virtual Machine Launcher?
Error: Solution: Remove extra hyphen ‘-‘
multi line string formatting in python
One way to make multi-line literal strings look good is to use a backslash to escape the newline, like this: output However, PEP-008 discourages backslash usage like that. It’s too fragile: if there’s a space between the backslash and the newline then the newline won’t get escaped, and the backslash will get printed. A more … Read more
Best way to convert string to bytes in Python 3?
If you look at the docs for bytes, it points you to bytearray: bytearray([source[, encoding[, errors]]]) Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence Types, as well as … Read more
ggplot2 line chart gives “geom_path: Each group consist of only one observation. Do you need to adjust the group aesthetic?”
you only have to add group = 1 into the ggplot or geom_line aes(). For line graphs, the data points must be grouped so that it knows which points to connect. In this case, it is simple — all points should be connected, so group=1. When more variables are used and multiple lines are drawn, the grouping … Read more
Google reCAPTCHA V3.0 not working. “ERROR for site owner: Invalid key type”
Squarespace form blocks do not support reCAPTCHA V3.0 Site or Secret Keys at the moment. Must stick with V2.0 Keys for the time being.
Unknown column in ‘field list’ error on MySQL Update query
Try using different quotes for “y” as the identifier quote character is the backtick (“`”). Otherwise MySQL “thinks” that you point to a column named “y”. See also MySQL 5 Documentation
What __init__ and self do in Python?
In this code: … the self variable represents the instance of the object itself. Most object-oriented languages pass this as a hidden parameter to the methods defined on an object; Python does not. You have to declare it explicitly. When you create an instance of the A class and call its methods, it will be passed automatically, as in … Read more
The difference between comparison to np.nan and isnull()
np.nan is not comparable to np.nan… directly. While Could also do examplesFilters nothing because nothing is equal to np.nan Filters out the null Use odd comparison behavior to get what we want anyway. If np.nan != np.nan is True then Just dropna
Sort an array in Java
Loops are also very useful to learn about, esp When using arrays,
How do I undo ‘git add’ before commit?
You can undo git add before commit with which will remove it from the current index (the “about to be committed” list) without changing anything else. You can use without any file name to unstage all due changes. This can come in handy when there are too many files to be listed one by one in a … Read more