inter

Checks whether a value appears in a collection.

Syntax: <expression> inter <collection>

Category#

collection

Related#

• intra

Examples#

radix/corpus/inter/inter.fab (canonical · keyword)#

Checks whether a value appears in a collection.

# =============================================================================
# inter — Checks whether a value appears in a collection
# =============================================================================
#
# What this teaches:
#   • Checks whether a value appears in a collection.
#   • Related keywords: intra
#
# Common mistakes:
#   • Using `inter` with a non-collection right operand — `inter` checks membership in a lista, tabula, or copia, not a scalar comparison.
#
# See also: intra
# =============================================================================

# inter — collection membership (element in set)
#
# <expr> inter <lista>
#
# GRAMMAR:
#   membershipExpr :← expr 'inter' expr
#
# EXPECTED OUTPUT:
#   none — stdout not pinned for this exemplum.

main {
    const _ condicio ← "agens"
    const _ aetas ← 21

    # Basic inter with textus lista
    if condicio between ["pendens", "agens", "pausa"] {
        print "condicio valida"
    }

    # inter with numeric lista
    if aetas between [18, 21, 65] {
        print "aetas insignis"
    }

    print "exempla inter"
}