## Any Word Completion Demo

(function() { "use strict"; var WORD = /[\w$]+/, RANGE = 500; CodeMirror.registerHelper("hint", "anyword", function(editor, options) { var word = options && options.word || WORD; var range = options && options.range || RANGE; var cur = editor.getCursor(), curLine = editor.getLine(cur.line); var end = cur.ch, start = end; while (start && word.test(curLine.charAt(start - 1))) --start; var curWord = start != end && curLine.slice(start, end); var list = options && options.list || [], seen = {}; var re = new RegExp(word.source, "g"); for (var dir = -1; dir <= 1; dir += 2) { var line = cur.line, endLine = Math.min(Math.max(line + dir * range, editor.firstLine()), editor.lastLine()) + dir; for (; line != endLine; line += dir) { var text = editor.getLine(line), m; while (m = re.exec(text)) { if (line == cur.line && m[0] === curWord) continue; if ((!curWord || m[0].lastIndexOf(curWord, 0) == 0) && !Object.prototype.hasOwnProperty.call(seen, m[0])) { seen[m[0]] = true; list.push(m[0]); } } } } return {list: list, from: CodeMirror.Pos(cur.line, start), to: CodeMirror.Pos(cur.line, end)}; }); })();

Press ctrl-space to activate autocompletion. The completion uses the anyword-hint.js module, which simply looks at nearby words in the buffer and completes to those.