2a:null 2b:["$","title",null,{"children":"Repeater | Adam Krawitz | Observable"}] 30:[] 2e:{"id":"bad495505dbc1556","slug":"repeater","title":"Repeater","thumbnail":"43ed0e1cf521737998ca19e116f772273c2171926138313f39ffa3fdede3ad5d","access_level":"public","create_time":"$D2021-04-26T05:06:36.304Z","update_time":"$D2021-10-21T21:16:21.821Z","view_time":null,"first_public_time":"$D2021-04-27T00:43:51.526Z","fork":{"id":"a2962b2064e4e957","slug":"simulation-controls","title":"Simulation Controls","owner":{"id":"3861495db0d6917b","login":"akrawitz","name":"Adam Krawitz"}},"stars":0,"starred":false,"owner":{"type":"team","id":"3861495db0d6917b","login":"akrawitz","name":"Adam Krawitz","avatar_url":"https://avatars-next.observableusercontent.com/232e39a655b3dffeaad79a6e590471290f026876224f3f7c9825f12c3f0147bc","tier":"starter_2024"},"version":427,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"f056c267619fba67","login":"akrawitz","name":"Adam Krawitz","avatar_url":"https://avatars-next.observableusercontent.com/8b0aba291db32e92917b2b37e94c3c5568c23f50e1e769e8f76508b16293220c","tier":null}],"members":[{"type":"individual","id":"f056c267619fba67","login":"akrawitz","name":"Adam Krawitz","avatar_url":"https://avatars-next.observableusercontent.com/8b0aba291db32e92917b2b37e94c3c5568c23f50e1e769e8f76508b16293220c","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":2,"collection":{"id":"bb4f3dd51b3bc8ff","slug":"shared-resources","title":"Shared Resources","owner":{"id":"3861495db0d6917b","login":"akrawitz","name":"Adam Krawitz"}},"type":"notebook","body":{"title":"Repeater","cells":[{"id":0,"value":"# Repeater\n1, 2, 3... repeater! The rep function provides a pared down version of R's [rep](https://stat.ethz.ch/R-manual/R-patched/library/base/html/rep.html) for easily repeating sequences.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":316,"value":"To use rep you need to `import` the function from this notebook:\n~~~js\n import {rep} from '@akrawitz/repeater'\n~~~","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":350,"value":"Repeat *each* item in the sequence:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":288,"value":"rep(['a', 'b', 'c'], {each: 3})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":357,"value":"Repeat the entire sequence multiple *times*:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":31,"value":"rep([1, 2, 3, 4], {times: 2})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":371,"value":"Repeat *each* item in the sequence, *and* repeat the entire sequence multiple *times*:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":361,"value":"rep([0, 1], {each: 2, times: 3})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":383,"value":"The items can be anything, but the copies are shallow, so be aware when using non-primitive types:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":295,"value":"danger = rep([[9, 5], 'banana', ['a', 'z']], {times: 2, each: 2})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":388,"value":"{\n danger[4][1] = 'Is this what I wanted?';\n return danger;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":319,"value":"The rep function is called like this:\n~~~js\n rep(sequence, {each: 1, times: 1})\n~~~ \nwhich returns:\n~~~js\n []\n~~~\n* sequence is the array whose elements are to be repeated. It can be an array of anything, but note that only shallow copies of elements will be made! It defaults to an empty array, [].\n* each is the number of times to repeat *each* item in *each* copy of the sequence. It defaults to 1.\n* times is the number of copies of the entire sequence in the result. It also defaults to 1.\n* The return value is a newly constructed array holding the repeated sequence.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":222,"value":"## Definitions","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":18,"value":"rep = function(sequence = [], {times = 1, each = 1} = {}) {\n let result = [];\n for (let t = 0; t < times; t++) {\n for (let i = 0; i < sequence.length; i++) {\n for (let e = 0; e < each; e++) {\n result.push(sequence[i]);\n }\n }\n }\n return result;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W30","stdlib":"1","titling":"auto"}} 2f:"$2e:body"