Returns the number of items currently in the container.
| size < metabang.cl-containers::abstract-bag/set-container > |
| size < metabang.cl-containers:alist-container > |
| size < array > |
| size < metabang.cl-containers::bag/set-container > |
| size < cl-graph:basic-graph > |
| size < metabang.cl-containers:basic-queue > |
| size < metabang.cl-containers:binary-search-tree > |
| size < metabang.cl-containers::bst-node > |
| size < metabang.cl-containers:contents-as-array-mixin > |
| size < metabang.cl-containers:contents-as-hashtable-mixin > |
| size < metabang.cl-containers::contents-as-sequence-mixin > |
| size < metabang.cl-containers:dlist-container > |
| size < hash-table > |
| size < list > |
| size < metabang.cl-containers:package-container > |
| size < metabang.cl-containers:priority-queue-on-container > |
| size < metabang.cl-containers:quad-tree > |
| size < metabang.cl-containers:ring-buffer > |
| size < metabang.cl-containers:stable-associative-container > |
| size < metabang.cl-containers:stack-container > |
| size < vector > |
| size < metabang.cl-containers:vector-container > |