npm run webpack試試
分享的時(shí)候加一個(gè)問(wèn)號(hào)
vue.js文檔說(shuō)得很清楚了：https://cn.vuejs.org/v2/guide...
一定要獲取數(shù)組里面的null就是用filter獲取，const nullArr = arr.filter(item=> item===null)
ES5: var nullArr = _times.filter(function(item){ return item === null })
但是null這個(gè)值你獲取了是沒(méi)有意義的，有意義的應(yīng)該是null的位置，也就是數(shù)組的下標(biāo)
==============================
function getNulls(arr) {
return arr.reduce(function(nullList, item, index) {
if (item === null) {
nullList.push(index);
return nullList;
}
return [];
}, []);
}
var arr = [1, 2, 3, null, 4, null, null, 8, null, null, null];
var result = getNulls(arr);
console.log(result);
// [8, 9, 10]上面是獲取下標(biāo)的方法。不過(guò)我還是不太理解你的需求，比如你為什么要在if判斷？最好你能完整描述下需求，以找到更好的實(shí)現(xiàn)方式
選擇器前面加上 /deep/
引號(hào)里面是字符串啊
var a = "66666";//和這個(gè)沒(méi)區(qū)別csdn上面的，直接搬了過(guò)來(lái):
因?yàn)橐鲇^點(diǎn)，觀點(diǎn)的屋子類似于知乎的話題，所以得想辦法把他給爬下來(lái)，搞了半天最終還是妥妥的搞定了，代碼是python寫的，不懂得麻煩自學(xué)哈！懂得直接看代碼，絕對(duì)可用
#coding:utf-8
"""
@author:haoning
@create time:2015.8.5
"""
from __future__ import division # 精確除法
from Queue import Queue
from __builtin__ import False
import json
import os
import re
import platform
import uuid
import urllib
import urllib2
import sys
import time
import MySQLdb as mdb
from bs4 import BeautifulSoup
reload(sys)
sys.setdefaultencoding( "utf-8" )
headers = {
'User-Agent' : 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0',
'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8',
'X-Requested-With':'XMLHttpRequest',
'Referer':'https://www.zhihu.com/topics',
'Cookie':'__utma=51854390.517069884.1416212035.1416212035.1416212035.1; q_c1=c02bf44d00d240798bfabcfc95baeb56|1455778173000|1416205243000; _za=b1c8ae35-f986-46a2-b24a-cb9359dc6b2a; aliyungf_tc=AQAAAJ1m71jL1woArKqF22VFnL/wRy6C; _xsrf=9d494558f9271340ab24598d85b2a3c8; cap_id="MDNiMjcwM2U0MTRhNDVmYjgxZWVhOWI0NTA2OGU5OTg=|1455864276|2a4ce8247ebd3c0df5393bb5661713ad9eec01dd"; n_c=1; _alicdn_sec=56c6ba4d556557d27a0f8c876f563d12a285f33a'
}
DB_HOST = '127.0.0.1'
DB_USER = 'root'
DB_PASS = 'root'
queue= Queue() #接收隊(duì)列
nodeSet=set()
keywordSet=set()
stop=0
offset=-20
level=0
maxLevel=7
counter=0
base=""
conn = mdb.connect(DB_HOST, DB_USER, DB_PASS, 'zhihu', charset='utf8')
conn.autocommit(False)
curr = conn.cursor()
def get_html(url):
try:
req = urllib2.Request(url)
response = urllib2.urlopen(req,None,3) #在這里應(yīng)該加入代理
html = response.read()
return html
except:
pass
return None
def getTopics():
url = 'https://www.zhihu.com/topics'
print url
try:
req = urllib2.Request(url)
response = urllib2.urlopen(req) #鍦ㄨ繖閲屽簲璇ュ姞鍏ヤ唬鐞?
html = response.read().decode('utf-8')
print html
soup = BeautifulSoup(html)
lis = soup.find_all('li', {'class' : 'zm-topic-cat-item'})
for li in lis:
data_id=li.get('data-id')
name=li.text
curr.execute('select id from classify_new where name=%s',(name))
y= curr.fetchone()
if not y:
curr.execute('INSERT INTO classify_new(data_id,name)VALUES(%s,%s)',(data_id,name))
conn.commit()
except Exception as e:
print "get topic error",e
def get_extension(name):
where=name.rfind('.')
if where!=-1:
return name[where:len(name)]
return None
def which_platform():
sys_str = platform.system()
return sys_str
def GetDateString():
when=time.strftime('%Y-%m-%d',time.localtime(time.time()))
foldername = str(when)
return foldername
def makeDateFolder(par,classify):
try:
if os.path.isdir(par):
newFolderName=par + '//' + GetDateString() + '//' +str(classify)
if which_platform()=="Linux":
newFolderName=par + '/' + GetDateString() + "/" +str(classify)
if not os.path.isdir( newFolderName ):
os.makedirs( newFolderName )
return newFolderName
else:
return None
except Exception,e:
print "kk",e
return None
def download_img(url,classify):
try:
extention=get_extension(url)
if(extention is None):
return None
req = urllib2.Request(url)
resp = urllib2.urlopen(req,None,3)
dataimg=resp.read()
name=str(uuid.uuid1()).replace("-","")+"_www.guandn.com"+extention
top="E://topic_pic"
folder=makeDateFolder(top, classify)
filename=None
if folder is not None:
filename =folder+"http://"+name
try:
if "e82bab09c_m" in str(url):
return True
if not os.path.exists(filename):
file_object = open(filename,'w+b')
file_object.write(dataimg)
file_object.close()
return '/room/default/'+GetDateString()+'/'+str(classify)+"/"+name
else:
print "file exist"
return None
except IOError,e1:
print "e1=",e1
pass
except Exception as e:
print "eee",e
pass
return None #如果沒(méi)有下載下來(lái)就利用原來(lái)網(wǎng)站的鏈接
def getChildren(node,name):
global queue,nodeSet
try:
url="https://www.zhihu.com/topic/"+str(node)+"/hot"
html=get_html(url)
if html is None:
return
soup = BeautifulSoup(html)
p_ch='父話題'
node_name=soup.find('div', {'id' : 'zh-topic-title'}).find('h1').text
topic_cla=soup.find('div', {'class' : 'child-topic'})
if topic_cla is not None:
try:
p_ch=str(topic_cla.text)
aList = soup.find_all('a', {'class' : 'zm-item-tag'}) #獲取所有子節(jié)點(diǎn)
if u'子話題' in p_ch:
for a in aList:
token=a.get('data-token')
a=str(a).replace('\n','').replace('\t','').replace('\r','')
start=str(a).find('>')
end=str(a).rfind('</a>')
new_node=str(str(a)[start+1:end])
curr.execute('select id from rooms where name=%s',(new_node)) #先保證名字絕不相同
y= curr.fetchone()
if not y:
print "y=",y,"new_node=",new_node,"token=",token
queue.put((token,new_node,node_name))
except Exception as e:
print "add queue error",e
except Exception as e:
print "get html error",e
def getContent(n,name,p,top_id):
try:
global counter
curr.execute('select id from rooms where name=%s',(name)) #先保證名字絕不相同
y= curr.fetchone()
print "exist?? ",y,"n=",n
if not y:
url="https://www.zhihu.com/topic/"+str(n)+"/hot"
html=get_html(url)
if html is None:
return
soup = BeautifulSoup(html)
title=soup.find('div', {'id' : 'zh-topic-title'}).find('h1').text
pic_path=soup.find('a',{'id':'zh-avartar-edit-form'}).find('img').get('src')
description=soup.find('div',{'class':'zm-editable-content'})
if description is not None:
description=description.text
if (u"未歸類" in title or u"根話題" in title): #允許入庫(kù)，避免死循環(huán)
description=None
tag_path=download_img(pic_path,top_id)
print "tag_path=",tag_path
if (tag_path is not None) or tag_path==True:
if tag_path==True:
tag_path=None
father_id=2 #默認(rèn)為雜談
curr.execute('select id from rooms where name=%s',(p))
results = curr.fetchall()
for r in results:
father_id=r[0]
name=title
curr.execute('select id from rooms where name=%s',(name)) #先保證名字絕不相同
y= curr.fetchone()
print "store see..",y
if not y:
friends_num=0
temp = time.time()
x = time.localtime(float(temp))
create_time = time.strftime("%Y-%m-%d %H:%M:%S",x) # get time now
create_time
creater_id=None
room_avatar=tag_path
is_pass=1
has_index=0
reason_id=None
#print father_id,name,friends_num,create_time,creater_id,room_avatar,is_pass,has_index,reason_id
######################有資格入庫(kù)的內(nèi)容
counter=counter+1
curr.execute("INSERT INTO rooms(father_id,name,friends_num,description,create_time,creater_id,room_avatar,is_pass,has_index,reason_id)VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)",(father_id,name,friends_num,description,create_time,creater_id,room_avatar,is_pass,has_index,reason_id))
conn.commit() #必須時(shí)時(shí)進(jìn)入數(shù)據(jù)庫(kù)，不然找不到父節(jié)點(diǎn)
if counter % 200==0:
print "current node",name,"num",counter
except Exception as e:
print "get content error",e
def work():
global queue
curr.execute('select id,node,parent,name from classify where status=1')
results = curr.fetchall()
for r in results:
top_id=r[0]
node=r[1]
parent=r[2]
name=r[3]
try:
queue.put((node,name,parent)) #首先放入隊(duì)列
while queue.qsize() >0:
n,p=queue.get() #頂節(jié)點(diǎn)出隊(duì)
getContent(n,p,top_id)
getChildren(n,name) #出隊(duì)內(nèi)容的子節(jié)點(diǎn)
conn.commit()
except Exception as e:
print "what's wrong",e
def new_work():
global queue
curr.execute('select id,data_id,name from classify_new_copy where status=1')
results = curr.fetchall()
for r in results:
top_id=r[0]
data_id=r[1]
name=r[2]
try:
get_topis(data_id,name,top_id)
except:
pass
def get_topis(data_id,name,top_id):
global queue
url = 'https://www.zhihu.com/node/TopicsPlazzaListV2'
isGet = True;
offset = -20;
data_id=str(data_id)
while isGet:
offset = offset + 20
values = {'method': 'next', 'params': '{"topic_id":'+data_id+',"offset":'+str(offset)+',"hash_id":""}'}
try:
msg=None
try:
data = urllib.urlencode(values)
request = urllib2.Request(url,data,headers)
response = urllib2.urlopen(request,None,5)
html=response.read().decode('utf-8')
json_str = json.loads(html)
ms=json_str['msg']
if len(ms) <5:
break
msg=ms[0]
except Exception as e:
print "eeeee",e
#print msg
if msg is not None:
soup = BeautifulSoup(str(msg))
blks = soup.find_all('div', {'class' : 'blk'})
for blk in blks:
page=blk.find('a').get('href')
if page is not None:
node=page.replace("/topic/","") #將更多的種子入庫(kù)
parent=name
ne=blk.find('strong').text
try:
queue.put((node,ne,parent)) #首先放入隊(duì)列
while queue.qsize() >0:
n,name,p=queue.get() #頂節(jié)點(diǎn)出隊(duì)
size=queue.qsize()
if size > 0:
print size
getContent(n,name,p,top_id)
getChildren(n,name) #出隊(duì)內(nèi)容的子節(jié)點(diǎn)
conn.commit()
except Exception as e:
print "what's wrong",e
except urllib2.URLError, e:
print "error is",e
pass
if __name__ == '__main__':
i=0
while i<400:
new_work()
i=i+1
說(shuō)下數(shù)據(jù)庫(kù)的問(wèn)題，我這里就不傳附件了，看字段自己建立，因?yàn)檫@確實(shí)太簡(jiǎn)單了，我是用的mysql，你看自己的需求自己建。
有什么不懂得麻煩去去轉(zhuǎn)盤網(wǎng)找我，因?yàn)檫@個(gè)也是我開發(fā)的，上面會(huì)及時(shí)更新qq群號(hào)，這里不留qq號(hào)啥的，以免被系統(tǒng)給K了。
使用ConcurrentHashMap:new ConcurrentHashMap<String,Object>();
或者Collections的靜態(tài)內(nèi)部類synchronizedMap:Collections.synchronizedMap都可以
我也遇到這個(gè)問(wèn)題了，有人知道嗎？
到目前為止的3.0.2版本，ant-design關(guān)于這個(gè)Select的Number屬性還不支持，寫法只能在initValue時(shí)設(shè)置成String(val.id)的形式強(qiáng)制轉(zhuǎn)換為String類型，然后在提交給后臺(tái)后使用Number(val)方法強(qiáng)制轉(zhuǎn)換為Number類型提交數(shù)據(jù)。
1.查看你網(wǎng)絡(luò)是否出現(xiàn)了問(wèn)題
2.看看你的對(duì)應(yīng)路徑是否正確
能改服務(wù)器嗎？
能的話，在服務(wù)器中加個(gè)filter，如下
package Fil;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet Filter implementation class Fil
*/
@WebFilter("/*")
public class Fil implements Filter {
/**
* Default constructor.
*/
public Fil() {
// TODO Auto-generated constructor stub
}
/**
* @see Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Expose-Headers", "Content-Length,Content-Range");
response.setHeader("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With,Range,Content-Length");
chain.doFilter(req, res);
}
/**
* @see Filter#init(FilterConfig)
*/
public void init(FilterConfig fConfig) throws ServletException {
// TODO Auto-generated method stub
}
}不能的話，用jsonp。
<div className={this.state.extendStyle.className} style={this.state.isRed ? divECharts:redStyle }></div>
沒(méi)有把高階組件包裹起來(lái)啊
你卻少的應(yīng)該是css-loader
Vue.extend 和 Vue.util.extend 在 vue.runtime.js 文件中是這么定義的。
Vue.util = {
warn: warn,
extend: extend,
mergeOptions: mergeOptions,
defineReactive: defineReactive$$1
};
/**
* Mix properties into target object.
*/
function extend (to, _from) {
for (var key in _from) {
to[key] = _from[key];
}
return to
}
/**
* Class inheritance
*/
Vue.extend = function (extendOptions) {
extendOptions = extendOptions || {};
var Super = this;
/* ... */
var Sub = function VueComponent (options) {
this._init(options);
};
/* ... */
return Sub
};
Vue.util.extend 的主要作用就是合并 { el: '#root', router, store }和 App就這么簡(jiǎn)單。
1.移動(dòng)端上zepto確實(shí)比jq要好,可以理解成殘廢版的jq,因?yàn)橐苿?dòng)端流量很貴,性能不及pc(很久以前,現(xiàn)在好多了),所以會(huì)使用小點(diǎn)的jq,但是隨著時(shí)代的發(fā)展使用框架會(huì)讓工程變得更容易管理更容易維護(hù),但是像jq zepto 這種基本功,會(huì)是一定要會(huì)的,但是不要在短時(shí)間內(nèi)深入,知道怎么回事就可以了.
2.用了框架就不用jq了,為啥?jq封裝了大量兼容性的dom操作(這也是jq的價(jià)值所在),從實(shí)際問(wèn)題出發(fā),你用到dom無(wú)非都是像從頁(yè)面拿數(shù)據(jù),想把數(shù)據(jù)渲染成dom,改個(gè)樣式,加個(gè)動(dòng)畫,這些在mv*框架中,dom操作基本都被屏蔽掉了,你只要把視圖和數(shù)據(jù)綁定好,其中一方發(fā)生改變,那么另一方也會(huì)隨之改變,就是說(shuō)jq做到的,框架幫你做的更好了.
4.特效方面大公司會(huì)有UED去考慮,會(huì)跟你說(shuō)她要什么樣的,你就給她做就好了,小點(diǎn)的公司有UI,她們幾乎只給你設(shè)計(jì)圖,然后你照著圖做就好了,如果有什么好的想法去跟她們商量,在業(yè)務(wù)上不要跨界.
5.這個(gè)沒(méi)有一個(gè)嚴(yán)格的評(píng)判標(biāo)準(zhǔn),一個(gè)業(yè)務(wù)復(fù)雜的功能頁(yè)面有時(shí)候要弄一個(gè)周,一個(gè)簡(jiǎn)單的小項(xiàng)目4/5個(gè)頁(yè)面,三個(gè)小時(shí)就提測(cè)了.只要不讓別人看見你偷懶就好.
3.前端東西駁雜,不要著急,新人先學(xué)習(xí)vue吧,比較友好,多跟身邊的人交流,學(xué)習(xí)他們的優(yōu)點(diǎn),不要在網(wǎng)上找什么rxjs好那就學(xué),ng好那就學(xué),沒(méi)有實(shí)際應(yīng)用,學(xué)什么都忘.
加油.
簡(jiǎn)單粗暴的方法，截圖
btn.onclick=st() 就相當(dāng)于
document.getElementById('btn').onclick = function(){
alert("sd")
}給彈框加個(gè)白色的底色試試。
北大青鳥APTECH成立于1999年。依托北京大學(xué)優(yōu)質(zhì)雄厚的教育資源和背景，秉承“教育改變生活”的發(fā)展理念，致力于培養(yǎng)中國(guó)IT技能型緊缺人才，是大數(shù)據(jù)專業(yè)的國(guó)家
達(dá)內(nèi)教育集團(tuán)成立于2002年，是一家由留學(xué)海歸創(chuàng)辦的高端職業(yè)教育培訓(xùn)機(jī)構(gòu)，是中國(guó)一站式人才培養(yǎng)平臺(tái)、一站式人才輸送平臺(tái)。2014年4月3日在美國(guó)成功上市，融資1
北大課工場(chǎng)是北京大學(xué)校辦產(chǎn)業(yè)為響應(yīng)國(guó)家深化產(chǎn)教融合／校企合作的政策，積極推進(jìn)“中國(guó)制造2025”，實(shí)現(xiàn)中華民族偉大復(fù)興的升級(jí)產(chǎn)業(yè)鏈。利用北京大學(xué)優(yōu)質(zhì)教育資源及背
博為峰，中國(guó)職業(yè)人才培訓(xùn)領(lǐng)域的先行者
曾工作于聯(lián)想擔(dān)任系統(tǒng)開發(fā)工程師，曾在博彥科技股份有限公司擔(dān)任項(xiàng)目經(jīng)理從事移動(dòng)互聯(lián)網(wǎng)管理及研發(fā)工作，曾創(chuàng)辦藍(lán)懿科技有限責(zé)任公司從事總經(jīng)理職務(wù)負(fù)責(zé)iOS教學(xué)及管理工作。
浪潮集團(tuán)項(xiàng)目經(jīng)理。精通Java與.NET 技術(shù)， 熟練的跨平臺(tái)面向?qū)ο箝_發(fā)經(jīng)驗(yàn)，技術(shù)功底深厚。 授課風(fēng)格 授課風(fēng)格清新自然、條理清晰、主次分明、重點(diǎn)難點(diǎn)突出、引人入勝。
精通HTML5和CSS3；Javascript及主流js庫(kù)，具有快速界面開發(fā)的能力，對(duì)瀏覽器兼容性、前端性能優(yōu)化等有深入理解。精通網(wǎng)頁(yè)制作和網(wǎng)頁(yè)游戲開發(fā)。
具有10 年的Java 企業(yè)應(yīng)用開發(fā)經(jīng)驗(yàn)。曾經(jīng)歷任德國(guó)Software AG 技術(shù)顧問(wèn)，美國(guó)Dachieve 系統(tǒng)架構(gòu)師，美國(guó)AngelEngineers Inc. 系統(tǒng)架構(gòu)師。
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