Sha256: 308e02c276fea613a258069fef002d7789f965877e19332d44f978dc266178e4
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Versions: 11
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Stored size: 1.17 KB
Contents
// alter.js
// MIT licensed, see LICENSE file
// Copyright (c) 2013 Olov Lassus <olov.lassus@gmail.com>
var assert = require("assert");
var stableSort = require("stable");
// fragments is a list of {start: index, end: index, str: string to replace with}
function alter(str, fragments) {
"use strict";
var isArray = Array.isArray || function(v) {
return Object.prototype.toString.call(v) === "[object Array]";
};;
assert(typeof str === "string");
assert(isArray(fragments));
// stableSort isn't in-place so no need to copy array first
var sortedFragments = stableSort(fragments, function(a, b) {
return a.start - b.start;
});
var outs = [];
var pos = 0;
for (var i = 0; i < sortedFragments.length; i++) {
var frag = sortedFragments[i];
assert(pos <= frag.start);
assert(frag.start <= frag.end);
outs.push(str.slice(pos, frag.start));
outs.push(frag.str);
pos = frag.end;
}
if (pos < str.length) {
outs.push(str.slice(pos));
}
return outs.join("");
}
if (typeof module !== "undefined" && typeof module.exports !== "undefined") {
module.exports = alter;
}
Version data entries
11 entries across 11 versions & 4 rubygems