caching

问题 I have seen related questions to my question, but those answers didn't work for me. I am trying to install xgboost package, but I got this error: *No files/directories in C:\Users\Fatemeh\AppData\Local\Temp\pip-build-57cpr7io\xgboost\pip-egg-info (from PKG-INFO)* I have tried almost all the options such as --no-cache-dir , --no-clean but got the same error. I would appreciate it if you can help me fix this. I tried installing from Github and tried other methods (using cmd and setup.py scripts

问题 I am using Angular5 and angular service worker . I cached some data and some assets and everything is working fine as expected and even deployed the code. Now, if I update some code and deploy again, the service worker doesnot get updated. So, I had gone through Angular service worker link and I Implemened SwUpdate service . Here is my code: I created a service and called it in App Component import { Injectable, NgZone } from '@angular/core'; import { interval } from 'rxjs/observable/interval

问题 I know that python has a concept of small integers which are numbers from -5 to 256 , and if two variables assign to same numbers between this range, they both will use the same underlying object. From Python documentation, #ifndef NSMALLPOSINTS #define NSMALLPOSINTS 257 #endif #ifndef NSMALLNEGINTS #define NSMALLNEGINTS 5 #endif /* Small integers are preallocated in this array so that they can be shared. The integers that are preallocated are those in the range -NSMALLNEGINTS (inclusive) to

问题 I am trying to store a canvas reference in a global object and then apply that reference to an element instead of regenerating the canvas. here is my existing code. I hope that makes sense. thanks in advance! waveformCache is assumed to be a global var cL = document.getElementById('track' + trackId + 'WaveformL'); var cR = document.getElementById('track' + trackId + 'WaveformR'); if (waveformCache.hasOwnProperty(track.path)) { var waveformCacheItem = waveformCache[track.path]; if

问题 I am trying to store a canvas reference in a global object and then apply that reference to an element instead of regenerating the canvas. here is my existing code. I hope that makes sense. thanks in advance! waveformCache is assumed to be a global var cL = document.getElementById('track' + trackId + 'WaveformL'); var cR = document.getElementById('track' + trackId + 'WaveformR'); if (waveformCache.hasOwnProperty(track.path)) { var waveformCacheItem = waveformCache[track.path]; if

问题 I've got a WCF service with the following settings: NetNamedPipeBinding ConcurrencyMode.Multiple InstanceContextMode.Single Now I've got a client that accesses to this WCF service in a multi-threaded fashion. As far as I understand I have to open a new connection to the service for each thread to avoid threads to block each others. In this case how expensive is the Open() call ( service is in the same computer )? Shall I cache/pool the my client class? ( derived from ClientBase ) or does WCF

问题 My application is Spring MVC application. Tried using Spring Annotation based Caching. But it not working. Please refer my code below 1. pom.xml <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.giggal.spring</groupId> <artifactId>spring-tutorial-mvc</artifactId> <version>0.0.1-SNAPSHOT<

问题 When I use the cache to store data,I fund that spark is running very slow. However, when I don't use cache to store data,the speed is very good.My main profile is follows: SPARK_JAVA_OPTS+="-Dspark.local.dir=/home/wangchao/hadoop-yarn-spark/tmp_out_info -Dspark.rdd.compress=true -Dspark.storage.memoryFraction=0.4 -Dspark.shuffle.spill=false -Dspark.executor.memory=1800m -Dspark.akka.frameSize=100 -Dspark.default.parallelism=6" And my test code is: val file = sc.textFile("hdfs://10.168.9.240

问题 I'm have an action /json that returns json from the server. Unfortunately in IE, the browser likes to cache this json. How can I make it so that this action doesn't cache? 回答1: Make sure your responses are not telling the browser that the content expires in the future. There are two HTTP headers the control this. Expires Cache-Control - There are many possible values for this header, but the one that controls expiration is max-age=foo. In addition, IE may be revalidating. This means that IE

问题 I'm have an action /json that returns json from the server. Unfortunately in IE, the browser likes to cache this json. How can I make it so that this action doesn't cache? 回答1: Make sure your responses are not telling the browser that the content expires in the future. There are two HTTP headers the control this. Expires Cache-Control - There are many possible values for this header, but the one that controls expiration is max-age=foo. In addition, IE may be revalidating. This means that IE