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Name	Size	Permission	Action
index.js	2.34 KB	-rw-r--r--

Code Editor : index.js

'use strict';

var isNative = /\.node$/;

function forEach(obj, callback) {
    for ( var key in obj ) {
        if (!Object.prototype.hasOwnProperty.call(obj, key)) {
            continue;
        }
        callback(key);
    }
}

function assign(target, source) {
    forEach(source, function (key) {
        target[key] = source[key];
    });
    return target;
}

function clearCache(requireCache) {
    forEach(requireCache, function (resolvedPath) {
        if (!isNative.test(resolvedPath)) {
            delete requireCache[resolvedPath];
        }
    });
}

module.exports = function (requireCache, callback, callbackForModulesToKeep, module) {

var originalCache = assign({}, requireCache);
    clearCache(requireCache);

if (callbackForModulesToKeep) {

var originalModuleChildren = module.children ? module.children.slice() : false; // Creates a shallow copy of module.children

callbackForModulesToKeep();

// Lists the cache entries made by callbackForModulesToKeep()
        var modulesToKeep = [];
        forEach(requireCache, function (key) {
            modulesToKeep.push(key);
        });

// Discards the modules required in callbackForModulesToKeep()
        clearCache(requireCache);

if (module.children) { // Only true for node.js
            module.children = originalModuleChildren; // Removes last references to modules required in callbackForModulesToKeep() -> No memory leak
        }

// Takes the cache entries of the original cache in case the modules where required before
        for ( var i = 0; i < modulesToKeep.length; i+=1 ) {
            if (originalCache[modulesToKeep[i]]) {
                requireCache[modulesToKeep[i]] = originalCache[modulesToKeep[i]];
            }
        }

}

var freshModule = callback();

var stealthCache = callbackForModulesToKeep ? assign({}, requireCache) : false;

clearCache(requireCache);

if (callbackForModulesToKeep) {
        // In case modules to keep were required inside the stealthy require for the first time, copy them to the restored cache
        for ( var k = 0; k < modulesToKeep.length; k+=1 ) {
            if (stealthCache[modulesToKeep[k]]) {
                requireCache[modulesToKeep[k]] = stealthCache[modulesToKeep[k]];
            }
        }
    }

assign(requireCache, originalCache);

return freshModule;

};

Urban Research Lab

The Urban Research Lab (URL) at IIIT-Delhi was established in 2020, during a time when the pandemic brought the complexities of urban life more visible than ever. What started as an initiative by faculty and students has grown into a collaborative space for critically exploring and reimagining the urban questions through research, dialogue, and interdisciplinary engagement.

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Code Editor : index.js

Urban Research Lab