我正在使用IntelliJ 12,它将我的成员变量注释放在同一行,我讨厌!如何设置代码格式化程序以在不同的行上保留注释?
谢谢!
我可以在spark-shell中成功运行一个spark工作但是当它的包并通过spark-submit运行时会得到一个NoSuchMethodError.
这向我表明了类路径的某种不匹配.有没有办法可以比较两个类路径?某种日志声明?
谢谢!
15/05/28 12:46:46 ERROR Executor: Exception in task 1.0 in stage 0.0 (TID 1)
java.lang.NoSuchMethodError: scala.Predef$.ArrowAssoc(Ljava/lang/Object;)Ljava/lang/Object;
at com.ldamodel.LdaModel$$anonfun$5$$anonfun$apply$5.apply(LdaModel.scala:22)
at com.ldamodel.LdaModel$$anonfun$5$$anonfun$apply$5.apply(LdaModel.scala:22)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
at scala.collection.AbstractTraversable.map(Traversable.scala:105)
at com.ldamodel.LdaModel$$anonfun$5.apply(LdaModel.scala:22)
at com.ldamodel.LdaModel$$anonfun$5.apply(LdaModel.scala:22)
at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371)
at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:202)
at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:56)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:64)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:203)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Run Code Online (Sandbox Code Playgroud) 我有以下查询,其中id喜欢按"raceDate"和"raceNo"asc排序.我可以弄清楚如何按一个字段排序,而不是两个,任何想法?
def list = {
params.max = Math.min( params.max ? params.max.toInteger() : 20, 100)
params.offset = params?.offset?.toInteger() ?: 0
params.sort = "raceDate"
params.order = params?.order ?: "asc"
def results = Race.createCriteria().list(
max: params.max,
offset: params.offset,
sort: params.sort,
order: params.order
) {
and {
if (params.raceNo && params.raceNo != '')
eq("raceNo", params.raceNo.toInteger())
if (params.country && params.country != '')
eq("country", params.country)
if (params.venue && params.venue != '')
eq("venue", params.venue)
if (params.raceType && params.raceType != '')
eq("raceType", params.raceType)
if (params.surface && params.surface != …Run Code Online (Sandbox Code Playgroud) 我试图了解这个AngularJS工厂方法的返回部分的目的是什么意思?
return {
getMessages: getMessages
};
Run Code Online (Sandbox Code Playgroud)
如果我们向这个名为getAnotherMessage()的工厂添加了一个新方法会发生什么,我们是否需要更新这个返回段?
myModule.factory('HelloWorld', function($q, $timeout) {
var getMessages = function() {
var deferred = $q.defer();
$timeout(function() {
deferred.resolve(['Hello', 'world!']);
}, 2000);
return deferred.promise;
};
return {
getMessages: getMessages
};
});
Run Code Online (Sandbox Code Playgroud) 我刚刚开始使用Python3.4中的asyncio库,并编写了一个小程序,试图同时获取50个网页.该程序在几百个请求之后以"太多打开文件"异常爆炸.
我认为我的fetch方法用'response.read_and_close()'方法调用关闭连接.
有什么想法在这里发生了什么?我是以正确的方式解决这个问题吗?
import asyncio
import aiohttp
@asyncio.coroutine
def fetch(url):
response = yield from aiohttp.request('GET', url)
response = yield from response.read_and_close()
return response.decode('utf-8')
@asyncio.coroutine
def print_page(url):
page = yield from fetch(url)
# print(page)
@asyncio.coroutine
def process_batch_of_urls(round, urls):
print("Round starting: %d" % round)
coros = []
for url in urls:
coros.append(asyncio.Task(print_page(url)))
yield from asyncio.gather(*coros)
print("Round finished: %d" % round)
@asyncio.coroutine
def process_all():
api_url = 'https://google.com'
for i in range(10):
urls = []
for url in range(50):
urls.append(api_url)
yield from process_batch_of_urls(i, urls) …Run Code Online (Sandbox Code Playgroud) 我是angularJS的新手,对缓存等有疑问.
我有一个包含两个步骤的向导,我希望能够单击返回和下一步,并且表单仍然填写为用户拥有它们.
在我的page1Partial我有这个:
<li ng-repeat="pick in picks | orderBy:orderProperty">
<b><span ng-bind="pick.name"/></b>
<input type="checkbox" ng-model="pick.checked" ng-click="updateBasket(pick)">
</li>
Run Code Online (Sandbox Code Playgroud)
当我转到下一页,然后单击后面的复选框被清除,因为我再次调用我的RESful调用java服务.如何缓存此响应?
从我的控制器,每次都会访问我的REST Web服务.
$scope.picks = Pick.query();
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我的服务
angular.module('picksService', ['ngResource']).
factory('Pick', function ($resource) {
return $resource('rest/picks/:id', {}, {
'save': {method: 'PUT'}
});
});
Run Code Online (Sandbox Code Playgroud) 在练习一些算法时,我遇到了以下问题,我无法弄清楚时间和空间的复杂程度.
问题: 从数组中打印成对的num,其总和为k.例如
int[] arr = new int[]{1, 7, 2, 3, 4};
int k = 4;
findSum(arr, k);
Run Code Online (Sandbox Code Playgroud)
将输出
Pair: 1, 3
Run Code Online (Sandbox Code Playgroud)
我的问题: 下面解决方案的运行时和空间复杂度是多少?
Java示例如下:
private void findSum(int[] arr, int k) {
if (arr == null || arr.length < 2)
throw new RuntimeException();
Arrays.sort(arr);
int i = 0; int j = arr.length -1;
while (i < j) {
int sum = arr[i] + arr[j];
if (sum == k)
{
System.out.println("Pair: " + arr[i] + ", " + arr[j]);
i++;
} …Run Code Online (Sandbox Code Playgroud) 我试图了解当您打开/关闭Arduino Uno上的LED时,"引擎盖下"会发生什么.
带有硬件项目的基本Hello World似乎是闪烁的板载LED.在Arduino的情况下,有一个LED连接到引脚12.
我看了一下源代码digitalWrite:
void digitalWrite(uint8_t pin, uint8_t val)
{
uint8_t timer = digitalPinToTimer(pin);
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *out;
if (port == NOT_A_PIN)
return;
// If the pin that support PWM output, we need to turn it off
// before doing a digital write.
if (timer != NOT_ON_TIMER)
turnOffPWM(timer);
out = portOutputRegister(port);
uint8_t oldSREG = SREG;
cli();
if (val == LOW) {
*out &= ~bit;
}
else {
*out …Run Code Online (Sandbox Code Playgroud) angularjs ×2
javascript ×2
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algorithm ×1
apache-spark ×1
arduino ×1
arduino-uno ×1
big-o ×1
c ×1
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controller ×1
criteria ×1
formatting ×1
grails ×1
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hardware ×1
hibernate ×1
java ×1
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