It’s not about lines of code. As Steve Mcconnell and Bob Martin say (two pretty good references on coding best practices), a method should do one thing and only one thing. However many lines of code it takes to do that one thing is how many lines it should have. If that “one thing” can … Read more
As is common in Vim, there are a bunch of ways! Note that the first two solutions depend on an absence of blank lines. If your cursor is on the line with the function name, try d}. It will delete everything to the next block (i.e. your function body). Within the function body itself, dap … Read more
It’s useful as an argument to higher order functions (functions which take functions as arguments), where you want some particular value left unchanged. Example 1: Leave a value alone if it is in a Just, otherwise, return a default of 7. Prelude Data.Maybe> :t maybe maybe :: b -> (a -> b) -> Maybe a … Read more
It is normally done with the local keyword, which is, as you seem to know, not defined by POSIX. Here is an informative discussion about adding ‘local’ to POSIX. However, even the most primitive POSIX-compliant shell I know of which is used by some GNU/Linux distributions as the /bin/sh default, dash (Debian Almquist Shell), supports … Read more
Like all variables in Kotlin, function references normally cannot be null. In order to allow a null value, you have to add a ? to the end of the type definition, like so: var callback1 : (() -> Unit)? = null var callback2 : (((a) -> c, b) -> Unit)? = null You will usually … Read more
An idempotent function can cause idempotent side-effects. A pure function cannot. For example, a function which sets the text of a textbox is idempotent (because multiple calls will display the same text), but not pure. Similarly, deleting a record by GUID (not by count) is idempotent, because the row stays deleted after subsequent calls. (additional … Read more
The “braces” are making an object literal, i.e. they create an object. It is one argument. Example: function someFunc(arg) { alert(arg.foo); alert(arg.bar); } someFunc({foo: “This”, bar: “works!”}); the object can be created beforehand as well: var someObject = { foo: “This”, bar: “works!” }; someFunc(someObject); I recommend to read the MDN JavaScript Guide – Working … Read more
I prefer using structures for my options. This gives you an easy way to store the options and an easy way to define them. Also, the whole thing becomes rather compact. function example(varargin) %# define defaults at the beginning of the code so that you do not need to %# scroll way down in case … Read more
There are a few different options on how to do this. The most basic is to use varargin, and then use nargin, size etc. to determine whether the optional arguments have been passed to the function. % Function that takes two arguments, X & Y, followed by a variable % number of additional arguments function … Read more