You should be able to use join, which joins on the index as default. Given your desired result, you must use outer as the join type. Signature: _.join(other, on=None, how=’left’, lsuffix=”, rsuffix=”, sort=False) Docstring: Join columns with other DataFrame either on index or on a key column. Efficiently Join multiple DataFrame objects by index at … Read more
Private members are only accessible within the class defining them. Protected members are accessible in the class that defines them and in classes that inherit from that class. Edit: Both are also accessible by friends of their class, and in the case of protected members, by friends of their derived classes. Edit 2: Use whatever … Read more
\t is not equivalent to \s+, but \s+ should match a tab (\t). The problem in your example is that the second pattern \s\s+ is looking for two or more whitespace characters, and \t is only one whitespace character. Here are some examples that should help you understand: \s\s+ would also match ‘ \t’, ‘\n\t’, ‘ \n \t \t\n’. Also, \s\s* is equivalent to \s+. Both will match one or more whitespace … Read more
Quoting from the language specs:Iota Within a constant declaration, the predeclared identifier iota represents successive untyped integer constants. It is reset to 0 whenever the reserved word const appears in the source and increments after each ConstSpec. It can be used to construct a set of related constants: Within an ExpressionList, the value of each … Read more
Depends on what you want to do: to read the value as an ascii code, you can write to convert the character ‘0’ -> 0, ‘1’ -> 1, etc, you can write Explanation:a – ‘0’ is equivalent to ((int)a) – ((int)’0′), which means the ascii values of the characters are subtracted from each other. Since 0 comes directly before 1 in the ascii … Read more
I’m not a huge fan of turning on exceptions for iostreams. I/O errors aren’t exceptional enough, in that errors are often very likely. I prefer only to use exceptions for less frequent error conditions. The code isn’t bad, but skipping 80 characters is a bit arbitrary, and the error variable isn’t necessary if you fiddle … Read more
Create a container for your text content, a span perhaps. Expand snippet JSFiddle
It’s a syntax for array references – you need to use (&array) to clarify to the compiler that you want a reference to an array, rather than the (invalid) array of references int & array[100];. EDIT: Some clarification. These three are different ways of declaring the same function. They’re all treated as taking an int * parameter, you can pass … Read more
Will result always be the floor of the division? What is the defined behavior? Not quite. It rounds toward 0, rather than flooring. 6.5.5 Multiplicative operators 6 When integers are divided, the result of the / operator is the algebraic quotient with any fractional part discarded.88) If the quotient a/b is representable, the expression (a/b)*b … Read more
In your example, it is because you can’t have a List of a primitive type. In other words, List<int> is not possible. You can, however, have a List<Integer> using the Integer class that wraps the int primitive. Convert your array to a List with the Arrays.asList utility method.