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Bibliographic Details
Main Author:	Lunenfeld, Marvin
Format:	Recurso educativo Open Access
Language:	en
Published:	1992
Subjects:	Culture Contact Elementary Secondary Education History Instruction Instructional Material Evaluation Instructional Materials Library Materials Publications Reading Materials United States History
Online Access:	https://eric.ed.gov/?id=EJ467819
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author	Lunenfeld, Marvin
author_facet	Lunenfeld, Marvin Lunenfeld, Marvin
collection	Education Resources Information Center
contents	Adrift in a Sargasso Sea: Recent Books on Christopher Columbus. Lunenfeld, Marvin Culture Contact Elementary Secondary Education History Instruction Instructional Material Evaluation Instructional Materials Library Materials Publications Reading Materials United States History Reviews more than 24 books recently published on the topic of Christopher Columbus and the voyages of discovery. Classifies the books as those designed for student use, for teachers and scholars, biographies, and "Columbus-Bashers." Maintains that the different viewpoints of Columbus the hero and Columbus the villain are barriers for serious researchers. (CFR)
format	Recurso educativo Open Access
id	eric_EJ467819
institution	ERIC Institute of Education Sciences
language	en
publishDate	1992
record_format	eric
spellingShingle	Adrift in a Sargasso Sea: Recent Books on Christopher Columbus. Lunenfeld, Marvin Culture Contact Elementary Secondary Education History Instruction Instructional Material Evaluation Instructional Materials Library Materials Publications Reading Materials United States History Adrift in a Sargasso Sea: Recent Books on Christopher Columbus. Lunenfeld, Marvin Culture Contact Elementary Secondary Education History Instruction Instructional Material Evaluation Instructional Materials Library Materials Publications Reading Materials United States History Reviews more than 24 books recently published on the topic of Christopher Columbus and the voyages of discovery. Classifies the books as those designed for student use, for teachers and scholars, biographies, and "Columbus-Bashers." Maintains that the different viewpoints of Columbus the hero and Columbus the villain are barriers for serious researchers. (CFR)
title	Adrift in a Sargasso Sea: Recent Books on Christopher Columbus.
topic	Culture Contact Elementary Secondary Education History Instruction Instructional Material Evaluation Instructional Materials Library Materials Publications Reading Materials United States History
url	https://eric.ed.gov/?id=EJ467819

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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