StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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126 lines
2.6 KiB
126 lines
2.6 KiB
4 years ago
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'use strict';
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var path = require('path');
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var utils = require('lazy-cache')(require);
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var fn = require;
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require = utils;
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/**
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* Lazily required module dependencies
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*/
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require('base-option', 'option');
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require('base-plugins', 'plugin');
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require('clone');
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require('clone-stats');
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require('define-property', 'define');
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require('extend-shallow', 'extend');
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require('isobject');
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require = fn;
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/**
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* Return true if the given value is an object.
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* @return {Boolean}
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*/
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utils.isObject = function(val) {
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return utils.isobject(val) || typeof val === 'function';
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};
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/**
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* Return true if `str` ends with substring `sub`
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*/
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utils.endsWith = function(str, sub) {
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return str.slice(-sub.length) === sub;
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};
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/**
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* Return true if the given value is a buffer
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*/
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utils.isBuffer = function(val) {
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if (val && val.constructor && typeof val.constructor.isBuffer === 'function') {
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return val.constructor.isBuffer(val);
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}
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return false;
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};
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/**
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* Return true if the given value is a stream.
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*/
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utils.isStream = function(val) {
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return utils.isObject(val)
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&& (typeof val.pipe === 'function')
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&& (typeof val.on === 'function');
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};
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/**
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* Resolve the name of the engine to use, or the file
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* extension to use for identifying the engine.
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*
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* @param {Object} `item`
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* @return {String}
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*/
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utils.resolveEngine = function(item) {
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var engine = item.options.engine || item.locals.engine || item.data.engine;
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if (!engine) {
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engine = path.extname(item.path);
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item.data.ext = engine;
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}
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return engine;
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};
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/**
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* Sync the _content and _contents properties on a view to ensure
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* both are set when setting either.
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*
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* @param {Object} `view` instance of a `View`
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* @param {String|Buffer|Stream|null} `contents` contents to set on both properties
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*/
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utils.syncContents = function(item, contents) {
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if (typeof item._contents === 'undefined') {
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item.define('_contents', null);
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item.define('_content', null);
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}
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if (contents === null) {
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item._contents = null;
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item._content = null;
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}
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if (typeof contents === 'string') {
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item._contents = new Buffer(contents);
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item._content = contents;
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}
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if (utils.isBuffer(contents)) {
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item._contents = contents;
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item._content = contents.toString();
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}
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if (utils.isStream(contents)) {
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item._contents = contents;
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item._content = contents;
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}
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};
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utils.inspectStream = function(stream) {
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var name = stream.constructor.name;
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if (!utils.endsWith(name, 'Stream')) {
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name += 'Stream';
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}
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return '<' + name + '>';
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};
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utils.cloneBuffer = function(buffer) {
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var res = new Buffer(buffer.length);
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buffer.copy(res);
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return res;
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};
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/**
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* Expose `utils` modules
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*/
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module.exports = utils;
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