当前位置: 首页>>代码示例>>TypeScript>>正文


TypeScript StateDB.fetch方法代码示例

本文整理汇总了TypeScript中@jupyterlab/coreutils.StateDB.fetch方法的典型用法代码示例。如果您正苦于以下问题:TypeScript StateDB.fetch方法的具体用法?TypeScript StateDB.fetch怎么用?TypeScript StateDB.fetch使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在@jupyterlab/coreutils.StateDB的用法示例。


在下文中一共展示了StateDB.fetch方法的5个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的TypeScript代码示例。

示例1: it

    it('should allow an overwrite data transformation', async () => {
      const transform = new PromiseDelegate<StateDB.DataTransform>();
      const db = new StateDB({
        namespace: 'test',
        transform: transform.promise
      });
      const prepopulate = new StateDB({ namespace: 'test' });
      const key = 'foo';
      const correct = 'bar';
      const incorrect = 'baz';
      const transformation: StateDB.DataTransform = {
        type: 'overwrite',
        contents: { [key]: correct }
      };

      // By sharing a namespace, the two databases will share data.
      await prepopulate.save(key, incorrect);
      let value = await prepopulate.fetch(key);
      expect(value).to.equal(incorrect);
      transform.resolve(transformation);
      await transform.promise;
      value = await db.fetch(key);
      expect(value).to.equal(correct);
      await db.clear();
    });
开发者ID:afshin,项目名称:jupyterlab,代码行数:25,代码来源:statedb.spec.ts

示例2: it

    it('should resolve a nonexistent key fetch with undefined', done => {
      let { localStorage } = window;

      let db = new StateDB({ namespace: 'test-namespace' });
      let key = 'foo:bar';

      expect(localStorage.length).to.be(0);
      db.fetch(key)
        .then(fetched => { expect(fetched).to.be(undefined); })
        .then(done)
        .catch(done);
    });
开发者ID:7125messi,项目名称:jupyterlab,代码行数:12,代码来源:statedb.spec.ts

示例3: StateDB

  activate: (app: JupyterLab) => {
    const state = new StateDB({ namespace: app.info.namespace });
    const version = app.info.version;
    const key = 'statedb:version';
    const fetch = state.fetch(key);
    const save = () => state.save(key, { version });
    const reset = () => state.clear().then(save);
    const check = (value: JSONObject) => {
      let old = value && value['version'];
      if (!old || old !== version) {
        const previous = old || 'unknown';
        console.log(`Upgraded: ${previous} to ${version}; Resetting DB.`);
        return reset();
      }
    };

    app.commands.addCommand(CommandIDs.clearStateDB, {
      label: 'Clear Application Restore State',
      execute: () => state.clear()
    });

    return fetch.then(check, reset).then(() => state);
  }
开发者ID:cameronoelsen,项目名称:jupyterlab,代码行数:23,代码来源:index.ts

示例4:

 .then(() => db.fetch(key))
开发者ID:7125messi,项目名称:jupyterlab,代码行数:1,代码来源:statedb.spec.ts

示例5:

 .then(() => prepopulate.fetch(key))
开发者ID:groutr,项目名称:jupyterlab,代码行数:1,代码来源:statedb.spec.ts


注:本文中的@jupyterlab/coreutils.StateDB.fetch方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。