如何在react.js中选择某些条形图?
这是我的代码:
var Progressbar = React.createClass({
getInitialState: function () {
return { completed: this.props.completed };
},
addPrecent: function (value) {
this.props.completed += value;
this.setState({ completed: this.props.completed });
},
render: function () {
var completed = this.props.completed;
if (completed < 0) { completed = 0 };
return (...);
}
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我想使用这个React组件:
var App = React.createClass({
getInitialState: function () {
return { baction: 'Progress1' };
},
handleChange: function (e) {
var value = e.target.value;
console.log(value);
this.setState({ baction: value });
},
handleClick10: function (e) …
Run Code Online (Sandbox Code Playgroud) 我是matplotlib的新用户,我的平台是Ubuntu 10.04 Python 2.6.5
这是我的代码
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
plt.plot([1,2,3])
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错误是:
/usr/local/lib/python2.6/dist-packages/matplotlib/backends/__init__.py:41: UserWarning:
Your currently selected backend, 'agg' does not support show().
Please select a GUI backend in your matplotlibrc file ('/usr/local/lib/python2.6/dist-packages/matplotlib/mpl-data/matplotlibrc')
or with matplotlib.use()
(backend, matplotlib.matplotlib_fname()))
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apt-get install libagg
但它不起作用.python-gtk2-dev
包,但仍然出现错误.这是错误:
>>> matplotlib.use('GTK')
>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/matplotlib/pyplot.py", line 95, in <module>
new_figure_manager, draw_if_interactive, show = …
Run Code Online (Sandbox Code Playgroud) 我想通过以下方式构建新的postgreSQL数据库:
CREATE DATABASE newdb
WITH OWNER = postgres
ENCODING = 'UTF8'
TABLESPACE = pg_default
LC_COLLATE = 'zh_CN.UTF-8'
CONNECTION LIMIT = -1;
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而错误是:
错误:新排序规则(zh_CN.UTF-8)与模板数据库的排序规则不兼容(en_US.UTF8)
提示:使用与模板数据库中相同的排序规则,或使用template0作为模板.
如何更改模板数据库集合?
我想尽快重复执行一个子进程.但是,有时这个过程需要很长时间,所以我想杀掉它.我使用signal.signal(...)如下所示:
ppid=pipeexe.pid
signal.signal(signal.SIGALRM, stop_handler)
signal.alarm(1)
.....
def stop_handler(signal, frame):
print 'Stop test'+testdir+'for time out'
if(pipeexe.poll()==None and hasattr(signal, "SIGKILL")):
os.kill(ppid, signal.SIGKILL)
return False
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但有时这段代码会试图阻止下一轮执行.停止测试/ home/lu/workspace/152/treefit/test2for time out/bin/sh:/ home/lu/workspace/153/squib_driver:not found ---这是下一次执行; 该程序错误地阻止它.
有谁知道如何解决这个问题?我想及时停止不执行1秒钟.sleep(n)经常等待n秒.我不希望我希望它可以执行不到1秒
当我将笔记本电脑连接到我的Android手机时,电脑远离我这个错误:
1827 Data Router usb connection is true
1827 Data Router DSR is on Don't send DTR on
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我的手机是带有Android 4.03的Galaxy II.
根据我的搜索:
DSR=Data Set Ready DCE (Data Carrier Detect) is ready to receive commands or data.
DTR=Data Terminal Ready Indicates presence of DTE to DCE.
Run Code Online (Sandbox Code Playgroud) 我尝试通过打字稿初始化数据库库。
我的 ts 是这样的:
import { User, UserRole } from '../entity/User';
import crypto from 'crypto';
import {dbManager, pwhash } from '..';
async function inituser()
{
const user = new User();
user.email = 'sheng.lu@mq.edu.au';
user.own_organization = []
user.salt = crypto.randomBytes(16).toString('hex');
user.password = pwhash("password", user.salt);
user.role = UserRole.admin;
await dbManager.save(user);
const duser = await dbManager.findOne(User);
return duser;
}
const duser = inituser();
console.log("Loaded users: ", duser);
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当我尝试通过 ts-node 运行脚本时:
npx ts-node db/initializers/inituser.ts
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有错误:
SyntaxError: Cannot use import statement outside a module
at …
Run Code Online (Sandbox Code Playgroud) 我使用playframework 2.3.0,最近我想添加CSRFFilter
当我在global.scala中导入csrf时:
import play.filters.csrf._
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我收到一个错误:
[错误] G:\ testprojects\app\Global.scala:7:对象过滤器不是包播放的成员[error] import play.filters.csrf._
我的plugin.sbt是
...
// The Play plugin
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.3.0")
...
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我使用Build.scala而不是build.sbt
lazy val root = Project("root", base = file(".")).enablePlugins(PlayScala)
.settings(baseSettings: _*)
.settings(libraryDependencies++=appDependencies)
.settings(
scalaVersion := "2.11.1",
version := "1.0"
)
Run Code Online (Sandbox Code Playgroud) 我在python中使用heapq模块,我发现我只能使用min heap,即使我使用reverse = True
我仍然得到最小的顶级堆
from heapq import *
h=[]
merge(h,key=lambda e:e[0],reverse=True)
heappush(h, (200, 1))
heappush(h, (300,2))
heappush(h, (400,3))
print(heappop(h))
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我仍然得到结果:
(200, 1)
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我想得到结果:
(400,3)
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怎么做?
这是最小的元素.我想要流行最大的emelment?
ps:这是问题的一部分找到max然后分成几个元素然后把它放回堆中.
当我做打字稿时:
let token = req.headers['x-access-token'] || req.headers['authorization'] as string;
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我有一个错误:
Argument of type 'string | string[]' is not assignable to parameter of type 'string'
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任何人都知道什么是 'string | 字符串[]'类型?我的意思是如果我想在打字稿中使用两个字符串的逻辑“或”。怎么做?
以及如何转换 'string | string[]' 类型到字符串类型?
我想DateTime
在Slick 2.0模型中使用.我用jodatime:
我添加了依赖项Build.scala
:
"joda-time" % "joda-time" % "2.3",
"org.joda" % "joda-convert" % "1.6"
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然后我做:
class Comment(tag:Tag) extends Table[(Long, Int, Int, String, Int, DateTime)](tag,"Comment"){
def id=column[Long]("ID", O.PrimaryKey)
def rate=column[Int]("rate")
def sub=column[Int]("subject")
def content=column[Int]("cotent")
def user_ID=column[Int]("user")
def time=column[DateTime]("time") //-----------an error here
def * = (id, rate,sub, content, user_ID, time)
}
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错误是:
could not find implicit value for parameter tm: scala.slick.ast.TypedType[org.joda.time.LocalDate]
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我添加了joda-convert jar但它似乎不起作用.如何在Slick模型类中添加DateTime?
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heap ×1
javascript ×1
jodatime ×1
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