overleaf/services/web/public/js/ace/autocomplete/util.js

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 * Copyright (c) 2012, Ajax.org B.V.
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 *       names of its contributors may be used to endorse or promote products
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define(function(require, exports, module) {
"use strict";

exports.parForEach = function(array, fn, callback) {
    var completed = 0;
    var arLength = array.length;
    if (arLength === 0)
        callback();
    for (var i = 0; i < arLength; i++) {
        fn(array[i], function(result, err) {
            completed++;
            if (completed === arLength)
                callback(result, err);
        });
    }
}

var ID_REGEX = /[a-zA-Z_0-9\$-]/;

exports.retrievePrecedingIdentifier = function(text, pos, regex) {
    regex = regex || ID_REGEX;
    var buf = [];
    for (var i = pos-1; i >= 0; i--) {
        if (regex.test(text[i]))
            buf.push(text[i]);
        else
            break;
    }
    return buf.reverse().join("");
}

exports.retrieveFollowingIdentifier = function(text, pos, regex) {
    regex = regex || ID_REGEX;
    var buf = [];
    for (var i = pos; i < text.length; i++) {
        if (regex.test(text[i]))
            buf.push(text[i]);
        else
            break;
    }
    return buf;
}

});