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const dbResponse = await this.client.databases.createIfNotExists({ id: this.databaseId }) this.database = dbResponse.database debug('Setting up the database...done!') debug('Setting up the container...') const coResponse = await this.database.containers.createIfNotExists({ id: this.co...
const dbResponse = await this.client.databases.createIfNotExists({ id: this.databaseId }) this.database = dbResponse.database debug('Setting up the database...done!') debug('Setting up the container...') const coResponse = await this.database.containers.createIfNotExists({ id: this.co...
通过.push()破坏性地添加元素: constarr = ['a','b']; arr.push('c');// adding an elementassert.deepEqual( arr, ['a','b','c'] );// Pushing Arrays (used as arguments via spreading (...)):arr.push(...['d','e']); assert.deepEqual( arr, ['a','b','c','d','e'] )...
Here, all you need to do is require that the field exists and stores anEnumField. You don't need to require any values for this field, as the rule sets the value tonull. Copy these blocks of code and paste them on top of the lastTODOcomment. ...
push(true); console.log(arr.length); // 4 console.log(arr); // [30, 10, 0, true] let last = arr.pop(); // last is true, arr is back to what it was array.shift(), array.unshift() These remove or add an element from the beginning of the array. let arr = ["cats", "...
array.push(2) constd1 =Date.now()constel = array.find((el) =>el >=2)constd2 =Date.now() console.log({ el,time: d2 - d1 }) 得到2,查找时间用了84毫秒,这是一个很恐怖的数字,而且耗时太长了。 幸运的是,从 ES13 开始,如果你之...
Luckily, this isn't a big issue in practice because there are great libraries that allow this kind of programming approach to be fast and not as memory intensive as it would be for you to manually clone objects and arrays.Bad:const addItemToCart = (cart, item) => { cart.push({ item...
isHostCallbackScheduled) {// flush 新进入 taskQueue 的任务if(peek(taskQueue) !==null) {// 如果本方法中的 advanceTimer 有对 taskQueue push 进任务// 则直接开始 flush 它们isHostCallbackScheduled =true;requestHostCallback(flushWork); }else{// 如果 taskQueue 仍然为空,就开始递归的调用该方法...
reduce(validators, function(errs, check) { if (check(obj)) return errs else return _.chain(errs).push(check.message).value(); }, []); }; } The use of _.reduce is appropriate in this case because, as each predicate is checked, the errs array is either extended or left alone. ...