Single letter identifiers (SILENTs) identifiers are a form of languages sugar assignment.
Letter
Lowercase
Many times is needed to use a variable in-place and to decluter the code we use silents:
each(var x: int; x in {.. 10}){
// implementation
}
each(x in {.. 10}){ // we use the sicale `x` here
// implementation
}
Uppercase
If a silent is uppercase, then it is a constant, can’t be changed. This is very important when using FOL for logic programming:
log vertical(l: line): bol = {
l[A:B] and // we assign sicales `A` and `B`
A[X:Y] and // we assign sicales `X` and `Y`
B[X:Y2] // here we assign only `Y2` becase `X` exists from before
}
Symbols
Meh
Meh is the _ identifier. The use of the term “meh” shows that the user is apathetic, uninterested, or indifferent to the question or subject at hand. It is occasionally used as an adjective, meaning something is mediocre or unremarkable.
We use meh when we want to discard the variable, or we dont intend to use:
var array: arr[int, 3] = {1, 2, 3};
var a, _, b: int = array; // we discard, the middle value