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這個主要是Angular臟檢查和echart的requestAnimationFrame方法沖突的問題。echart在繪制完成圖表之后，還是會不停調(diào)用requestAnimationFrame方法，而這個方法會觸發(fā)Angular的臟檢查，造成Angular不斷的檢查DOM樹，導致CPU占用一直居高不下，解決辦法如下：

this.ngZone.runOutsideAngular(() => {
  this.chart = echarts.init(this.root.nativeElement);
  this.chart.setOption(this.option, true);
})

這樣可以讓charts圖表的相關方法排除在Angular的臟檢查之外。
深入探討和研究可以參考：
echarts在GitHub上的一個關于該問題的issue
segmentfault探討這個問題的一篇文章

可以考慮類似jsfiddle或者codepen一樣放到云端運行,還有一個stakblitz是我覺得目前最好的在線js IDE,具有類似VS Code的代碼提示，并且可以自動下載添加npm依賴

開啟事務，只有操作都成功之后再commit提交事務，如果操作有失敗的就rollback回滾。
$model->startTrans();
$row = $model->where(['id'=>1])->update(['status'=>4]);
if ($row>0) {
//上面操作成功
//執(zhí)行自定義操作
$model->commit();
}else {
$model->rollback();
}

// 試試在main.js入口文件配合vue-router寫這個

router.afterEach((to,from,next) => {
    window.scrollTo(0,0);
});

你的文件應該先 open, 然后再read. 我下面的這個例子能夠正常work

#!/usr/bin/python

import csv

filename = './a.csv'
  
duration_list = []
with open(filename) as csvfile:
    reader = csv.DictReader(csvfile)
    for row in reader:
        duration_list.append(row['duration'])


print duration_list

創(chuàng)建一個theme.js

module.exports = () => {
  return {
    '@font-size-base': '14px',
    //others
  };
};

然后在webpack中引入就好了。

{
    "theme": "./src/styles/theme.js",
}

給你一個完整的工程，或者你想要的都在里面。dva initial project

:name="item[0]" 綁定item[0]
name="item[0]" 綁定字符串'item[0]'

你可以自己輸入和輸出來擬合函數(shù)啊，都有那么多參照點了。
也就是會說你輸入一個標準照片，分別采用各種濾鏡得到輸出照片，根據(jù)原始和輸出數(shù)據(jù)的關系，就可以擬合一個濾鏡函數(shù)出來（可能有誤差的）

生產(chǎn)環(huán)境 用nginx做靜態(tài)服務器

• 你好，你沒有在接口上使用注解把參數(shù)帶過去。

java code
List<Case> get_cases(@Param("num") int num, @Param("type")int type)

Mapper.xml code
#{num} 這樣的取值，這里的num參數(shù)名，是接口方法上@Param("num") 的內(nèi)容。

保留客戶端源IP
由于此功能的實施，目標容器中看到的源IP 不會是客戶端的原始源IP。要啟用客戶端IP的保留，可以在服務規(guī)范中配置以下字段（在GCE / Google Kubernetes引擎環(huán)境中支持）：
● service.spec.externalTrafficPolicy - 表示該服務是否希望將外部流量路由到節(jié)點本地或群集范圍的端點。有兩個可用選項：“群集”Cluster（默認）和“本地”Local?！叭杭毖谏w了客戶端源IP，并可能導致到另一個節(jié)點的第二跳，但應具有良好的整體負載分散。“本地”保留客戶端源IP并避免LoadBalancer和NodePort類型服務的第二跳，但可能會導致流量不均衡蔓延。
● service.spec.healthCheckNodePort - 指定服務的健康檢查節(jié)點端口（數(shù)字端口號）。如果未指定，則healthCheckNodePort由具有分配的節(jié)點端口的服務API后端創(chuàng)建。如果由客戶端指定，它將使用用戶指定的nodePort值。它僅在類型設置為“LoadBalancer”并且externalTrafficPolicy設置為“Local”時才起作用。
此功能可通過externalTrafficPolicy在服務配置文件中設置為“本地” 來激活。

{
  "kind": "Service",
  "apiVersion": "v1",
  "metadata": {
    "name": "example-service"
  },
  "spec": {
    "ports": [{
      "port": 8765,
      "targetPort": 9376
    }],
    "selector": {
      "app": "example"
    },
    "type": "LoadBalancer",
    "externalTrafficPolicy": "Local"
  }
}

那就直接先吧修改后的值，post到后臺存到數(shù)據(jù)庫，然后后臺把數(shù)據(jù)庫里的數(shù)據(jù)再全部返給你，你commit一個mutilations,再修改state，頁面就自動更新了呀。舉個修改列表數(shù)據(jù)的例子

import axios from 'axios';
const listData = {
  state:{
    list:null
  },
  mutations:{
    CHANGE_LIST(state,payload){
      state.list = payload
    }
  },
  actions:{
    changeListAction({commit}){
      axios.post("你后端的接口",{key:val}).then(res=>{
        if(res.data.result){
          commit("CHANGE_LIST",res.data.data)
        }
      })
    }

  }
};
export default listData

修改數(shù)據(jù)的時候，在組件中：

this.$store.dispatch('changeListAction');

你在組件中取數(shù)據(jù)的時候：

const listData = this.$store.state.resource.list

DOM 提供了一個方法：select()，用于選取文本域中的內(nèi)容 所以React 可以ref取到元素DOM，然后Dom.select()

可以把額外的屬性先封裝在數(shù)組中，然后再循環(huán)。

如果你說的vue中的proxyTable的配置，因為vue-cli 用了webpac-dev-server工具，而該工具又引用了http-proxy-middleware中間件，所以你看該中間件的使用就可以了。參考文章

#確保你的teacher_class表有unique index(teacherId, classId)
SELECT teacherId,COUNT(1) FROM teacher_class 
WHERE classId IN(1,2,3)
GROUP BY teacherId
HAVING COUNT(1)=3

1. w:匹配字母、數(shù)字、下劃線。等價于'[A-Za-z0-9_]'。
2. []:標記一個中括號表達式的開始和結(jié)束，定義匹配的字符范圍。
3. ^和$:分別指字符串的開始與結(jié)束。

注意:^匹配輸入字符串的開始位置，除非在方括號表達式中使用，此時它表示不接受該字符集合。即在這里表示不接受'\w.$'所代表的字符集合)

promotions.component.spec.ts：

import { ClubCodeGuard } from './../../../guards/club-code.guard';
import { EnrollMemberComponent } from './../enroll-member.component';
import { Router, ActivatedRoute } from "@angular/router";
import { EnrollMemberModule } from './../enroll-member.module';
import { MembershipService } from './../../../member/services/membership.service';
import { MemberForm } from './../models/enroll-member-form';
import { EnrollMemberPromotionsComponent } from './promotions.component';
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { DebugElement,Injectable,Component, OnInit, NgModule, ViewChild } from '@angular/core';
import { ComponentFixtureAutoDetect } from '@angular/core/testing';//自動變更檢測
import { async } from '@angular/core/testing';//異步的beforeEach
import { Member } from 'app/member/models/member';
import { FormsModule } from '@angular/forms';
import { ToastrModule } from 'ngx-toastr';
import { Observable, BehaviorSubject } from 'rxjs/Rx';
import { ProformaInvoiceComponent } from 'app/member-prospect-manager/enroll-member/proforma-invoice/proforma-invoice.component';
import { ClubService } from 'app/club/services';
import { HttpModule, Http } from '@angular/http';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { HandleErrorService } from '../../../shared-services/handle-error.service';
import { AccessTypeService } from '../../../club/services/access-type.service';
import { MemberService } from '../../../member/services/member.service';
import { CurrentUserService } from '../../../user/services/current-user.service';
import { GetCurrentUserService } from '../../../user/services/get-current-user.service';
import { PromotionService } from 'app/promotions/services/promotion.service';
import { FormService } from 'app/membership/services/form.service';
import { RouterTestingModule } from "@angular/router/testing";
import { EnrollMemberMembershipTypeComponent } from 'app/member-prospect-manager/enroll-member/membership-type/membership-type.component';
import { EnrollMemberMembershipInfoComponent } from 'app/member-prospect-manager/enroll-member/membership-info/membership-info.component';
import { EnrollMemberReviewAndPayComponent } from 'app/member-prospect-manager/enroll-member/review-and-pay/review-and-pay.component';
import { EnrollMemberConfirmationComponent } from 'app/member-prospect-manager/enroll-member/confirmation/confirmation.component';

describe('when navigate to promotion selecte', () => {

let component: EnrollMemberPromotionsComponent;
let fixture: ComponentFixture<EnrollMemberPromotionsComponent>;
let de: DebugElement;
let el: HTMLElement;

let location: Location;
let router: Router;
let mockAR: any = {
    params: {
      subscribe: function() {
        console.log('Subscribed.');
        Observable.of({ id: 123 });
      }
    }
  }
  let mockRouter = {
    navigate: jasmine.createSpy('navigate')
  } 
beforeEach(async () => {
    TestBed.configureTestingModule({
        providers: [
            MembershipService,
            ClubService,
            HandleErrorService,
            AccessTypeService,
            MemberService,
            GetCurrentUserService,
            PromotionService,
            CurrentUserService,
            Router,
            ActivatedRoute,
            FormService,
            { provide: Router, useValue: mockRouter }
        ],
        imports: [
            FormsModule,
            EnrollMemberModule,
            HttpClientModule,
            HttpModule,
            ToastrModule.forRoot(),
            RouterTestingModule.withRoutes([
                {
                  path: 'tab',
                  component: EnrollMemberComponent,
                  data: {
                    title: 'EnrollMemberComopnent',
                    iconClass: 'fa fa-bullhorn'
                  },
                  canActivate: [ClubCodeGuard],
                  children: [
                    {
                      path: '',
                      redirectTo: 'membership-type',
                      pathMatch: 'full'
                    },
                    {
                      path: 'membership-type',
                      component: EnrollMemberMembershipTypeComponent,
                      data: { title: 'EnrollMemberMembershipTypeComponent', iconClass: 'fa fa-bullhorn' },
                      canActivate: [ClubCodeGuard]
                    },
                    {
                      path: 'membership-info',
                      component: EnrollMemberMembershipInfoComponent,
                      data: { title: 'EnrollMemberMembershipInfoComponent', iconClass: 'fa fa-bullhorn' },
                      canActivate: [ClubCodeGuard]
                    },
                    {
                      path: 'promotions',
                      component: EnrollMemberPromotionsComponent,
                      data: { title: 'EnrollMemberPromotionsComponent', iconClass: 'fa fa-bullhorn' },
                      canActivate: [ClubCodeGuard]
                    },
                    {
                      path: 'review-pay',
                      component: EnrollMemberReviewAndPayComponent,
                      data: { title: 'EnrollMemberReviewAndPayComponent', iconClass: 'fa fa-bullhorn' },
                      canActivate: [ClubCodeGuard]
                    },
                    {
                      path: 'confirmation',
                      component: EnrollMemberConfirmationComponent,
                      data: { title: 'EnrollMemberConfirmationComponent', iconClass: 'fa fa-bullhorn' },
                      canActivate: [ClubCodeGuard]
                    }
                  ]
                },{
                  path: '',
                  redirectTo: 'tab',
                  pathMatch: 'full'
                }
              ])
        ]
    }).compileComponents();  // compile template and css


    router = TestBed.get(Router);
    location = TestBed.get(Location);
    fixture = TestBed.createComponent(EnrollMemberPromotionsComponent);
    router.initialNavigation();
});

beforeEach(() => {
    router = TestBed.get(Router);
    location = TestBed.get(Location);

    component = fixture.componentInstance;
    fixture.detectChanges();
});

it('should create', () => {
    expect(component).toBeTruthy();
});

});

你可以使用 ORM的對象操作數(shù)據(jù)庫，你也可以寫DQL操作數(shù)據(jù)，你可以寫 SQL來操作數(shù)據(jù)庫。

ORM 無法涵蓋所有的SQL標準，直接寫SQL又可能會有風險。就出了DQL，語法還和sql很像