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How to use readItemFromCursor method in wpt

Best JavaScript code snippet using wpt

interleaved-cursors-common.js

Source:interleaved-cursors-common.js

1// Infrastructure shared by interleaved-cursors-{small,large}.html2// Number of objects that each iterator goes over.3const itemCount = 10;4// Ratio of small objects to large objects.5const largeObjectRatio = 5;6// Size of large objects. This should exceed the size of a block in the storage7// method underlying the browser's IndexedDB implementation. For example, this8// needs to exceed the LevelDB block size on Chrome, and the SQLite block size9// on Firefox.10const largeObjectSize = 48 * 1024;11function objectKey(cursorIndex, itemIndex) {12  return `${cursorIndex}-key-${itemIndex}`;13}14function objectValue(cursorIndex, itemIndex) {15  if ((cursorIndex * itemCount + itemIndex) % largeObjectRatio === 0) {16    // We use a typed array (as opposed to a string) because IndexedDB17    // implementations may serialize strings using UTF-8 or UTF-16, yielding18    // larger IndexedDB entries than we'd expect. It's very unlikely that an19    // IndexedDB implementation would use anything other than the raw buffer to20    // serialize a typed array.21    const buffer = new Uint8Array(largeObjectSize);22    // Some IndexedDB implementations, like LevelDB, compress their data blocks23    // before storing them to disk. We use a simple 32-bit xorshift PRNG, which24    // should be sufficient to foil any fast generic-purpose compression scheme.25    // 32-bit xorshift - the seed can't be zero26    let state = 1000 + (cursorIndex * itemCount + itemIndex);27    for (let i = 0; i < largeObjectSize; ++i) {28      state ^= state << 13;29      state ^= state >> 17;30      state ^= state << 5;31      buffer[i] = state & 0xff;32    }33    return buffer;34  }35  return [cursorIndex, 'small', itemIndex];36}37// Writes the objects to be read by one cursor. Returns a promise that resolves38// when the write completes.39//40// We want to avoid creating a large transaction, because that is outside the41// test's scope, and it's a bad practice. So we break up the writes across42// multiple transactions. For simplicity, each transaction writes all the43// objects that will be read by a cursor.44function writeCursorObjects(database, cursorIndex) {45  return new Promise((resolve, reject) => {46    const transaction = database.transaction('cache', 'readwrite');47    transaction.onabort = () => { reject(transaction.error); };48    const store = transaction.objectStore('cache');49    for (let i = 0; i < itemCount; ++i) {50      store.put({51          key: objectKey(cursorIndex, i), value: objectValue(cursorIndex, i)});52    }53    transaction.oncomplete = resolve;54  });55}56// Returns a promise that resolves when the store has been populated.57function populateTestStore(testCase, database, cursorCount) {58  let promiseChain = Promise.resolve();59  for (let i = 0; i < cursorCount; ++i)60    promiseChain = promiseChain.then(() => writeCursorObjects(database, i));61  return promiseChain;62}63// Reads cursors in an interleaved fashion, as shown below.64//65// Given N cursors, each of which points to the beginning of a K-item sequence,66// the following accesses will be made.67//68// OC(i)    = open cursor i69// RD(i, j) = read result of cursor i, which should be at item j70// CC(i)    = continue cursor i71// |        = wait for onsuccess on the previous OC or CC72//73// OC(1)            | RD(1, 1) OC(2) | RD(2, 1) OC(3) | ... | RD(n-1, 1) CC(n) |74// RD(n, 1)   CC(1) | RD(1, 2) CC(2) | RD(2, 2) CC(3) | ... | RD(n-1, 2) CC(n) |75// RD(n, 2)   CC(1) | RD(1, 3) CC(2) | RD(2, 3) CC(3) | ... | RD(n-1, 3) CC(n) |76// ...77// RD(n, k-1) CC(1) | RD(1, k) CC(2) | RD(2, k) CC(3) | ... | RD(n-1, k) CC(n) |78// RD(n, k)           done79function interleaveCursors(testCase, store, cursorCount) {80  return new Promise((resolve, reject) => {81    // The cursors used for iteration are stored here so each cursor's onsuccess82    // handler can call continue() on the next cursor.83    const cursors = [];84    // The results of IDBObjectStore.openCursor() calls are stored here so we85    // we can change the requests' onsuccess handler after every86    // IDBCursor.continue() call.87    const requests = [];88    const checkCursorState = (cursorIndex, itemIndex) => {89      const cursor = cursors[cursorIndex];90      assert_equals(cursor.key, objectKey(cursorIndex, itemIndex));91      assert_equals(cursor.value.key, objectKey(cursorIndex, itemIndex));92      assert_equals(93          cursor.value.value.join('-'),94          objectValue(cursorIndex, itemIndex).join('-'));95    };96    const openCursor = (cursorIndex, callback) => {97      const request = store.openCursor(98          IDBKeyRange.lowerBound(objectKey(cursorIndex, 0)));99      requests[cursorIndex] = request;100      request.onsuccess = testCase.step_func(() => {101        const cursor = request.result;102        cursors[cursorIndex] = cursor;103        checkCursorState(cursorIndex, 0);104        callback();105      });106      request.onerror = event => reject(request.error);107    };108    const readItemFromCursor = (cursorIndex, itemIndex, callback) => {109      const request = requests[cursorIndex];110      request.onsuccess = testCase.step_func(() => {111        const cursor = request.result;112        cursors[cursorIndex] = cursor;113        checkCursorState(cursorIndex, itemIndex);114        callback();115      });116      const cursor = cursors[cursorIndex];117      cursor.continue();118    };119    // We open all the cursors one at a time, then cycle through the cursors and120    // call continue() on each of them. This access pattern causes maximal121    // trashing to an LRU cursor cache. Eviction scheme aside, any cache will122    // have to evict some cursors, and this access pattern verifies that the123    // cache correctly restores the state of evicted cursors.124    const steps = [];125    for (let cursorIndex = 0; cursorIndex < cursorCount; ++cursorIndex)126      steps.push(openCursor.bind(null, cursorIndex));127    for (let itemIndex = 1; itemIndex < itemCount; ++itemIndex) {128      for (let cursorIndex = 0; cursorIndex < cursorCount; ++cursorIndex)129        steps.push(readItemFromCursor.bind(null, cursorIndex, itemIndex));130    }131    const runStep = (stepIndex) => {132      if (stepIndex === steps.length) {133        resolve();134        return;135      }136      steps[stepIndex](() => { runStep(stepIndex + 1); });137    };138    runStep(0);139  });140}141function cursorTest(cursorCount) {142  promise_test(testCase => {143    return createDatabase(testCase, (database, transaction) => {144      const store = database.createObjectStore('cache',145          { keyPath: 'key', autoIncrement: true });146    }).then(database => {147      return populateTestStore(testCase, database, cursorCount).then(148          () => database);149    }).then(database => {150      database.close();151    }).then(() => {152      return openDatabase(testCase);153    }).then(database => {154      const transaction = database.transaction('cache', 'readonly');155      transaction.onabort = () => { reject(transaction.error); };156      const store = transaction.objectStore('cache');157      return interleaveCursors(testCase, store, cursorCount).then(158          () => database);159    }).then(database => {160      database.close();161    });162  }, `${cursorCount} cursors`);...

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2wptoolkit.readItemFromCursor(function(err, data){3    if(err){4        console.log(err);5    }else{6        console.log(data);7    }8});9var wptoolkit = require('wptoolkit');10wptoolkit.readItemFromCursor(function(err, data){11    if(err){12        console.log(err);13    }else{14        console.log(data);15    }16});17var wptoolkit = require('wptoolkit');18wptoolkit.readItemFromCursor(function(err, data){19    if(err){20        console.log(err);21    }else{22        console.log(data);23    }24});25var wptoolkit = require('wptoolkit');26wptoolkit.readItemFromCursor(function(err, data){27    if(err){28        console.log(err);29    }else{30        console.log(data);31    }32});33var wptoolkit = require('wptoolkit');34wptoolkit.readItemFromCursor(function(err, data){35    if(err){36        console.log(err);37    }else{38        console.log(data);39    }40});41var wptoolkit = require('wptoolkit');42wptoolkit.readItemFromCursor(function(err, data){43    if(err){44        console.log(err);45    }else{46        console.log(data);47    }48});49var wptoolkit = require('wptoolkit');50wptoolkit.readItemFromCursor(function(err, data){51    if(err){52        console.log(err);53    }else{54        console.log(data);55    }56});57var wptoolkit = require('wptoolkit

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var cursor = wptoolkit.readItemFromCursor();3console.log(cursor);4var wptoolkit = require('wptoolkit');5var cursor = wptoolkit.readItemFromCursor();6console.log(cursor);7var wptoolkit = require('wptoolkit');8var cursor = wptoolkit.readItemFromCursor();9console.log(cursor);10var wptoolkit = require('wptoolkit');11var cursor = wptoolkit.readItemFromCursor();12console.log(cursor);13var wptoolkit = require('wptoolkit');14var cursor = wptoolkit.readItemFromCursor();15console.log(cursor);16var wptoolkit = require('wptoolkit');17var cursor = wptoolkit.readItemFromCursor();18console.log(cursor);19var wptoolkit = require('wptoolkit');20var cursor = wptoolkit.readItemFromCursor();21console.log(cursor);22var wptoolkit = require('wptoolkit');23var cursor = wptoolkit.readItemFromCursor();24console.log(cursor);25var wptoolkit = require('wptoolkit');26var cursor = wptoolkit.readItemFromCursor();27console.log(cursor);28var wptoolkit = require('wptoolkit');29var cursor = wptoolkit.readItemFromCursor();30console.log(cursor);

Using AI Code Generation

1var wptools = require('wptools');2wptools.page('Barack Obama').then(function(page) {3    page.get().then(function(result) {4        console.log(result);5        console.log(result.sections[0].content[0].text);6    });7});

Using AI Code Generation

1var wptools = require('wptools');2var wp = new wptools();3wp.readItemFromCursor('Q5', function(err, item) {4    console.log(item);5});6var wptools = require('wptools');7var wp = new wptools();8wp.readItemFromCursor('Q5', function(err, item) {9    console.log(item);10});11var wptools = require('wptools');12var wp = new wptools();13wp.readItemFromCursor('Q5', function(err, item) {14    console.log(item);15});16var wptools = require('wptools');17var wp = new wptools();18wp.readItemFromCursor('Q5', function(err, item) {19    console.log(item);20});21var wptools = require('wptools');22var wp = new wptools();23wp.readItemFromCursor('Q5', function(err, item) {24    console.log(item);25});26var wptools = require('wptools');27var wp = new wptools();28wp.readItemFromCursor('Q5', function(err, item) {29    console.log(item);30});31var wptools = require('wptools');32var wp = new wptools();33wp.readItemFromCursor('Q5', function(err, item) {34    console.log(item);35});36var wptools = require('wptools');37var wp = new wptools();38wp.readItemFromCursor('Q5', function(err, item) {39    console.log(item);40});41var wptools = require('wptools');

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var result = wptoolkit.readItemFromCursor('C:\\Users\\test\\Desktop\\test.txt');3console.log(result);4var wptoolkit = require('wptoolkit');5var result = wptoolkit.writeItemToCursor('C:\\Users\\test\\Desktop\\test.txt');6console.log(result);7var wptoolkit = require('wptoolkit');8var result = wptoolkit.deleteItemFromCursor('C:\\Users\\test\\Desktop\\test.txt');9console.log(result);10var wptoolkit = require('wptoolkit');11var result = wptoolkit.createFolder('C:\\Users\\test\\Desktop\\test.txt');12console.log(result);13var wptoolkit = require('wptoolkit');14var result = wptoolkit.deleteFolder('C:\\Users\\test\\Desktop\\test.txt');15console.log(result);16var wptoolkit = require('wptoolkit');17var result = wptoolkit.listFolderContents('C:\\Users\\test\\Desktop\\test.txt');18console.log(result);19var wptoolkit = require('wptoolkit');20var result = wptoolkit.createFile('C:\\Users\\test\\Desktop\\test.txt');21console.log(result);22var wptoolkit = require('wptoolkit');23var result = wptoolkit.deleteFile('C:\\Users\\test\\Desktop\\test.txt');24console.log(result);25var wptoolkit = require('wptoolkit');26var result = wptoolkit.listFileContents('C:\\Users\\test\\Desktop\\test.txt');27console.log(result);28var wptoolkit = require('wptoolkit');29var result = wptoolkit.writeToFile('

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