This code is used to multiply the values of one column
select exp(sum(log(column))) from table
Try using required="true"
in bootstrap 3
I am late but i want to complete the answer.
An permission is added in manifest.xml
like
<uses-permission android:name="android.permission.INTERNET"/>
This is enough for standard permissions where no permission is prompted to the user. However, it is not enough to add permission only to manifest if it is a dangerous permission. See android doc. Like Camera, Storage permissions.
<uses-permission android:name="android.permission.CAMERA"/>
You will need to ask permission from user. I use RxPermission library that is widely used library for asking permission. Because it is long code which we have to write to ask permission.
RxPermissions rxPermissions = new RxPermissions(this); // where this is an Activity instance // Must be done during an initialization phase like onCreate
rxPermissions
.request(Manifest.permission.CAMERA)
.subscribe(granted -> {
if (granted) { // Always true pre-M
// I can control the camera now
} else {
// Oups permission denied
}
});
Add this library to your app
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
dependencies {
implementation 'com.github.tbruyelle:rxpermissions:0.10.1'
implementation 'com.jakewharton.rxbinding2:rxbinding:2.1.1'
}
I will soon released a new version of my app to support to galaxy ace.
You can download here: https://play.google.com/store/apps/details?id=droid.pr.coolflashlightfree
In order to solve your problem you should do this:
this._camera = Camera.open();
this._camera.startPreview();
this._camera.autoFocus(new AutoFocusCallback() {
public void onAutoFocus(boolean success, Camera camera) {
}
});
Parameters params = this._camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_ON);
this._camera.setParameters(params);
params = this._camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
this._camera.setParameters(params);
don't worry about FLASH_MODE_OFF because this will keep the light on, strange but it's true
to turn off the led just release the camera
If you are using Visual Studio, then you can use "Start Without Debugging" in the Debug menu.
It will automatically write "Press any key to continue . . ." to the console for you upon completion of the application and it will leave the console open for you until a key is pressed.
NamingException's answer worked for me. Except I used
var date = $("#date").dtpicker({ dateFormat: 'dd,MM,yyyy' }).val()
datepicker
didn't work but dtpicker
did.
Go to http://rubyinstaller.org/downloads/
Make sure that you check "Add ruby ... to your PATH".
Now you can use "ruby" in your "cmd".
If you installed ruby 1.9.3 I expect that the ruby is downloaded in C:\Ruby193
.
install Development Kit in rubyinstaller.
Make new folder such as C:\RubyDevKit
and unzip.
Go to the devkit directory and type ruby dk.rb init
to generate config.yml
.
If you installed devkit for 1.9.3, I expect that the config.yml
will be written as C:\Ruby193
.
If not, please correct path to your ruby folders.
After reviewing the config.yml
, you can finally type ruby dk.rb install
.
Now you can use "gem" in your "cmd". It's done!
pg_ctl -D /usr/local/var/postgres start
FATAL: could not open directory "pg_tblspc": No such file or directory
.mkdir /usr/local/var/postgres/pg_tblspc
FATAL: lock file "postmaster.pid" already exists
rm /usr/local/var/postgres/postmaster.pid
pg_ctl -D /usr/local/var/postgres start
I needed this peace of code as a subquery with some data filter before aggregation based on the outer most query but I wasn't able to do this using the chosen answer code because this filter should go in the inner most select (third level query) and the filter params was in the outer most select (first level query), which gave me the error ORA-00904: "TB_OUTERMOST"."COL": invalid identifier as the ANSI SQL states that table references (correlation names) are scoped to just one level deep.
I needed a solution with no levels of subquery and this one below worked great for me:
with
demotable as
(
select 1 group_id, 'David' name from dual union all
select 1 group_id, 'John' name from dual union all
select 1 group_id, 'Alan' name from dual union all
select 1 group_id, 'David' name from dual union all
select 2 group_id, 'Julie' name from dual union all
select 2 group_id, 'Charlie' name from dual
)
select distinct
group_id,
listagg(name, ',') within group (order by name) over (partition by group_id) names
from demotable
-- where any filter I want
group by group_id, name
order by group_id;
If you need to do this frequently, I would probably add a computed column PaymentMonth
to the table:
ALTER TABLE dbo.Payments ADD PaymentMonth AS MONTH(PaymentDate) PERSISTED
It's persisted and stored in the table - so there's really no performance overhead querying it. It's a 4 byte INT value - so the space overhead is minimal, too.
Once you have that, you could simplify your query to be something along the lines of:
SELECT ItemID, IsPaid,
(SELECT SUM(Amount) FROM Payments WHERE Year = 2010 And PaymentMonth = 1 AND UserID = 100) AS 'Jan',
(SELECT SUM(Amount) FROM Payments WHERE Year = 2010 And PaymentMonth = 2 AND UserID = 100) AS 'Feb',
.... and so on .....
FROM LIVE L
INNER JOIN Payments I ON I.LiveID = L.RECORD_KEY
WHERE UserID = 16178
if you want to store current date in table so you can use
GETDATE();
or pass this function as a parameter
eg. 'update tblname set curdate=GETDATE() where colname=123'
import random
random.shuffle(array)
download putty connection manager from here http://www.thegeekstuff.com/scripts/puttycm.zip
Thanks
Make sure you read SilverlightFox's answer. It highlights a more important reason.
The reason is mostly that if you know the source of a request you may want to customize it a little bit.
For instance lets say you have a website which has many recipes. And you use a custom jQuery framework to slide recipes into a container based on a link they click.
The link may be www.example.com/recipe/apple_pie
Now normally that returns a full page, header, footer, recipe content and ads. But if someone is browsing your website some of those parts are already loaded. So you can use an AJAX to get the recipe the user has selected but to save time and bandwidth don't load the header/footer/ads.
Now you can just write a secondary endpoint for the data like www.example.com/recipe_only/apple_pie
but that's harder to maintain and share to other people.
But it's easier to just detect that it is an ajax request making the request and then returning only a part of the data. That way the user wastes less bandwidth and the site appears more responsive.
The frameworks just add the header because some may find it useful to keep track of which requests are ajax and which are not. But it's entirely dependent on the developer to use such techniques.
It's actually kind of similar to the Accept-Language
header. A browser can request a website please show me a Russian version of this website without having to insert /ru/ or similar in the URL.
In Pythons <= 3.4 you can, as others suggested, use list(range(10))
in order to make a list out of a range (In general, any iterable).
Another alternative, introduced in Python 3.5
with its unpacking generalizations, is by using *
in a list literal []
:
>>> r = range(10)
>>> l = [*r]
>>> print(l)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Though this is equivalent to list(r)
, it's literal syntax and the fact that no function call is involved does let it execute faster. It's also less characters, if you need to code golf :-)
1) Setting the first Panel:
JFrame frame=new JFrame();
frame.getContentPane().add(new JPanel());
2)Replacing the panel:
frame.getContentPane().removeAll();
frame.getContentPane().add(new JPanel());
Also notice that you must do this in the Event's Thread, to ensure this use the SwingUtilities.invokeLater or the SwingWorker
SelectAllOnFocus works the first time the EditText gets focus, but if you want to select the text every time the user clicks on it, you need to call editText.clearFocus()
in between times.
For example, if your app has one EditText and one button, clicking the button after changing the EditText leaves the focus in the EditText. Then the user has to use the cursor handle and the backspace key to delete what's in the EditText before they can enter a new value. So call editText.clearFocus()
in the Button's onClick
method.
Parameters are directly supported in MVC by simply adding parameters onto your action methods. Given an action like the following:
public ActionResult GetImages(string artistName, string apiKey)
MVC will auto-populate the parameters when given a URL like:
/Artist/GetImages/?artistName=cher&apiKey=XXX
One additional special case is parameters named "id". Any parameter named ID can be put into the path rather than the querystring, so something like:
public ActionResult GetImages(string id, string apiKey)
would be populated correctly with a URL like the following:
/Artist/GetImages/cher?apiKey=XXX
In addition, if you have more complicated scenarios, you can customize the routing rules that MVC uses to locate an action. Your global.asax file contains routing rules that can be customized. By default the rule looks like this:
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = "" } // Parameter defaults
);
If you wanted to support a url like
/Artist/GetImages/cher/api-key
you could add a route like:
routes.MapRoute(
"ArtistImages", // Route name
"{controller}/{action}/{artistName}/{apikey}", // URL with parameters
new { controller = "Home", action = "Index", artistName = "", apikey = "" } // Parameter defaults
);
and a method like the first example above.
First off:
public class ProfileCollection implements Iterable<Profile> {
Second:
return m_Profiles.get(m_ActiveProfile);
$.ajax({
url: 'mail3.php',
type: 'POST',
data: 'contactName=' + name + '&contactEmail=' + email + '&spam=' + spam,
success: function(result) {
//console.log(result);
$('#results,#errors').remove();
$('#contactWrapper').append('<p id="results">' + result + '</p>');
$('#loading').fadeOut(500, function() {
$(this).remove();
});
if(result === "no_errors") location.href = "http://www.example.com/ThankYou.html"
}
});
var clone = Object.assign({}, {a: 1, b: 2, c: 3});
delete clone.b;
or if you accept property to be undefined:
var clone = Object.assign({}, {a: 1, b: 2, c: 3}, {b: undefined});
I don't know if this will help, but I did this:
LocationManager locationManager = (LocationManager) context.getSystemService(context.LOCATION_SERVICE);
<p style="margin-left:5em;">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut lacinia vestibulum quam sit amet aliquet. Phasellus tempor nisi eget tellus venenatis tempus. Aliquam dapibus porttitor convallis. Praesent pretium luctus orci, quis ullamcorper lacus lacinia a. Integer eget molestie purus. Vestibulum porta mollis tempus. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. </p>
That'll do it, there's a few improvements obviously, but that's the basics. And I use 'em'
as the measurement, you may want to use other units, like 'px'
.
EDIT: What they're describing above is a way of associating groups of styles, or classes, with elements on a web page. You can implement that in a few ways, here's one which may suit you:
In your HTML page, containing the <p>
tagged content from your DB add in a new 'style' node and wrap the styles you want to declare in a class like so:
<head>
<style type="text/css">
p { margin-left:5em; /* Or another measurement unit, like px */ }
</style>
</head>
<body>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut lacinia vestibulum quam sit amet aliquet.</p>
</body>
So above, all <p>
elements in your document will have that style rule applied. Perhaps you are pumping your paragraph content into a container of some sort? Try this:
<head>
<style type="text/css">
.container p { margin-left:5em; /* Or another measurement unit, like px */ }
</style>
</head>
<body>
<div class="container">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut lacinia vestibulum quam sit amet aliquet.</p>
</div>
<p>Vestibulum porta mollis tempus. Class aptent taciti sociosqu ad litora torquent per conubia nostra.</p>
</body>
In the example above, only the <p>
element inside the div, whose class name is 'container', will have the styles applied - and not the <p>
element outside the container.
In addition to the above, you can collect your styles together and remove the style element from the <head>
tag, replacing it with a <link>
tag, which points to an external CSS file. This external file is where you'd now put your <p>
tag styles. This concept is known as 'seperating content from style' and is considered good practice, and is also an extendible way to create styles, and can help with low maintenance.
In LinearLayout
, use: android:layout_gravity="center"
.
In RelativeLayout
, use: android:layout_centerInParent="true"
.
I had this problem. Couldn't install apk via the Downloads app. However opening the apk in a file manager app allowed me to install it fine. Using OI File Manager on stock Nexus 7 4.2.1
Use it ...
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.headless = True
driver = webdriver.Chrome(CHROMEDRIVER_PATH, chrome_options=options)
Use the "min-height" property
Be wary of paddings, margins and borders :)
html, body {
margin: 0;
padding: 0;
border: 0;
}
#B, #C, #D {
position: absolute;
}
#A{
top: 0;
width: 100%;
height: 35px;
background-color: #99CC00;
}
#B {
top: 35px;
width: 200px;
bottom: 35px;
background-color: #999999;
z-index:100;
}
#B2 {
min-height: 100%;
height: 100%;
margin-top: -35px;
bottom: 0;
background-color: red;
width: 200px;
overflow: scroll;
}
#B1 {
height: 35px;
width: 35px;
margin-left: 200px;
background-color: #CC0066;
}
#C {
top: 35px;
left: 200px;
right: 0;
bottom: 35px;
background-color: #CCCCCC;
}
#D {
bottom: 0;
width: 100%;
height: 35px;
background-color: #3399FF;
}
It is an attribute, but a boolean one (so it doesn't need a name, just a value -- I know, it's weird). You can set the property equivalent in Javascript:
document.getElementsByName("myButton")[0].disabled = true;
A simple solution would be to just write
this.date = new Date().toLocaleDateString();
date .toLocaleDateString()
time .toLocaleTimeString()
both .toLocaleString()
Hope this helps.
Add these dependencies to your maven pom.xml . It will take care of all of the imports including OPCpackage
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.2</version>
</dependency>
I use this
var e = document.getElementById('ticket_category_clone').value;
Notice that you don't need the '#' character in javascript.
function check () {
var str = document.getElementById('ticket_category_clone').value;
if (str==="Hardware")
{
SPICEWORKS.utils.addStyle('#ticket_c_hardware_clone{display: none !important;}');
}
}
SPICEWORKS.app.helpdesk.ready(check);?
no-store
should not be necessary in normal situations, and can harm both speed and usability. It is intended for use where the HTTP response contains information so sensitive it should never be written to a disk cache at all, regardless of the negative effects that creates for the user.
How it works:
Normally, even if a user agent such as a browser determines that a response shouldn't be cached, it may still store it to the disk cache for reasons internal to the user agent. This version may be utilised for features like "view source", "back", "page info", and so on, where the user hasn't necessarily requested the page again, but the browser doesn't consider it a new page view and it would make sense to serve the same version the user is currently viewing.
Using no-store
will prevent that response being stored, but this may impact the browser's ability to give "view source", "back", "page info" and so on without making a new, separate request for the server, which is undesirable. In other words, the user may try viewing the source and if the browser didn't keep it in memory, they'll either be told this isn't possible, or it will cause a new request to the server. Therefore, no-store
should only be used when the impeded user experience of these features not working properly or quickly is outweighed by the importance of ensuring content is not stored in the cache.
My current understanding is that it is just for intermediate cache server. Even if "no-cache" is in response, intermediate cache server can still save the content to non-volatile storage.
This is incorrect. Intermediate cache servers compatible with HTTP 1.1 will obey the no-cache
and must-revalidate
instructions, ensuring that content is not cached. Using these instructions will ensure that the response is not cached by any intermediate cache, and that all subsequent requests are sent back to the origin server.
If the intermediate cache server does not support HTTP 1.1, then you will need to use Pragma: no-cache
and hope for the best. Note that if it doesn't support HTTP 1.1 then no-store
is irrelevant anyway.
For an empty line in Markdown, escape a space (\
), and then add a new line.
Example:
"\
"
Remember: escape a space and escape a new line. That way is Markdown compliant and should compile properly in any compiler. You may have to select the example text to see how it is set up.
re.findall finds all the occurrence of the regex in a string and return in a list. Here, you are using a list of strings, you need this to use re.findall
Note - If the regex fails, an empty list is returned.
import re, sys
f = open('picklee', 'r')
lines = f.readlines()
regex = re.compile(r'[A-Z]+')
for line in lines:
print (re.findall(regex, line))
see this is pure css bases dropdown menu:-
HTML
<ul id="menu">
<li><a href="">Home</a></li>
<li><a href="">About Us</a>
<ul>
<li><a href="">The Team</a></li>
<li><a href="">History</a></li>
<li><a href="">Vision</a></li>
</ul>
</li>
<li><a href="">Products</a>
<ul>
<li><a href="">Cozy Couch</a></li>
<li><a href="">Great Table</a></li>
<li><a href="">Small Chair</a></li>
<li><a href="">Shiny Shelf</a></li>
<li><a href="">Invisible Nothing</a></li>
</ul>
</li>
<li><a href="">Contact</a>
<ul>
<li><a href="">Online</a></li>
<li><a href="">Right Here</a></li>
<li><a href="">Somewhere Else</a></li>
</ul>
</li>
</ul>
CSS
ul
{
font-family: Arial, Verdana;
font-size: 14px;
margin: 0;
padding: 0;
list-style: none;
}
ul li
{
display: block;
position: relative;
float: left;
}
li ul
{
display: none;
}
ul li a
{
display: block;
text-decoration: none;
color: #ffffff;
border-top: 1px solid #ffffff;
padding: 5px 15px 5px 15px;
background: #2C5463;
margin-left: 1px;
white-space: nowrap;
}
ul li a:hover
{
background: #617F8A;
}
li:hover ul
{
display: block;
position: absolute;
}
li:hover li
{
float: none;
font-size: 11px;
}
li:hover a
{
background: #617F8A;
}
li:hover li a:hover
{
background: #95A9B1;
}
see the demo:- http://jsfiddle.net/XPE3w/7/
gstreamer can handle webcam input. If I remeber well, there are python bindings for it!
Building on Kugel's answer and taking Mike Graham's words of caution into consideration, what if we make a wrapper?
class DictWrap(object):
""" Wrap an existing dict, or create a new one, and access with either dot
notation or key lookup.
The attribute _data is reserved and stores the underlying dictionary.
When using the += operator with create=True, the empty nested dict is
replaced with the operand, effectively creating a default dictionary
of mixed types.
args:
d({}): Existing dict to wrap, an empty dict is created by default
create(True): Create an empty, nested dict instead of raising a KeyError
example:
>>>dw = DictWrap({'pp':3})
>>>dw.a.b += 2
>>>dw.a.b += 2
>>>dw.a['c'] += 'Hello'
>>>dw.a['c'] += ' World'
>>>dw.a.d
>>>print dw._data
{'a': {'c': 'Hello World', 'b': 4, 'd': {}}, 'pp': 3}
"""
def __init__(self, d=None, create=True):
if d is None:
d = {}
supr = super(DictWrap, self)
supr.__setattr__('_data', d)
supr.__setattr__('__create', create)
def __getattr__(self, name):
try:
value = self._data[name]
except KeyError:
if not super(DictWrap, self).__getattribute__('__create'):
raise
value = {}
self._data[name] = value
if hasattr(value, 'items'):
create = super(DictWrap, self).__getattribute__('__create')
return DictWrap(value, create)
return value
def __setattr__(self, name, value):
self._data[name] = value
def __getitem__(self, key):
try:
value = self._data[key]
except KeyError:
if not super(DictWrap, self).__getattribute__('__create'):
raise
value = {}
self._data[key] = value
if hasattr(value, 'items'):
create = super(DictWrap, self).__getattribute__('__create')
return DictWrap(value, create)
return value
def __setitem__(self, key, value):
self._data[key] = value
def __iadd__(self, other):
if self._data:
raise TypeError("A Nested dict will only be replaced if it's empty")
else:
return other
Yes you can if you are using HTML5, this code is valid not otherwise:
<a href="#foo"><div>.......</div></a>
If you are not using HTML5, you can make your link block
:
<a href="#foo" id="link">Click Here</a>
CSS:
#link {
display : block;
width:100px;
height:40px;
}
Notice that you can apply width
, height
only after making your link block level element.
you can use the following Bootstrap class with
<tr class="w-25">
</tr>
for more details check the following page https://getbootstrap.com/docs/4.1/utilities/sizing/
To piggyback on rkj's answer, to avoid endless prompts (and force the command recursively), enter the following into the command line, within the project folder:
$ rm -rf .git
Or to delete .gitignore and .gitmodules if any (via @aragaer):
$ rm -rf .git*
Then from the same ex-repository folder, to see if hidden folder .git is still there:
$ ls -lah
If it's not, then congratulations, you've deleted your local git repo, but not a remote one if you had it. You can delete GitHub repo on their site (github.com).
To view hidden folders in Finder (Mac OS X) execute these two commands in your terminal window:
defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder
Source: http://lifehacker.com/188892/show-hidden-files-in-finder.
gradle-wrapper.properties please use grade version 6.3 or above
distributionUrl=https://services.gradle.org/distributions/gradle-6.3-all.zip
../android/gradle/wrapper/gradle-wrapper.properties
It is not allocating memory at assignment of value 12 to integer pointer. Therefore it crashes, because it's not finding any memory.
You can try this:
#include<stdio.h>
#include<stdlib.h>
int *fun();
int main()
{
int *ptr;
ptr=fun();
printf("\n\t\t%d\n",*ptr);
}
int *fun()
{
int ptr;
ptr=12;
return(&ptr);
}
I found it at
C:\Users\~\AppData\Local\GitHub\PortableGit_<some_identifier>\mingw32\libexec\git-core\
In a programming context, directives provide guidance to the compiler to alter how it would otherwise process input, i.e change some behaviour.
“Directives allow you to attach behavior to elements in the DOM.”
directives are split into the 3 categories:
Yes, in Angular 2, Components are a type of Directive. According to the Doc,
“Angular components are a subset of directives. Unlike directives, components always have a template and only one component can be instantiated per an element in a template.”
Angular 2 Components are an implementation of the Web Component concept. Web Components consists of several separate technologies. You can think of Web Components as reusable user interface widgets that are created using open Web technology.
Try this one,
myFrame.setVisible(true);
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
myComponent.grabFocus();
myComponent.requestFocus();//or inWindow
}
});
Try this one..
var listCheck = [];
console.log($("input[name='YourCheckBokName[]']"));
$("input[name='YourCheckBokName[]']:checked").each(function() {
console.log($(this).val());
listCheck .push($(this).val());
});
console.log(listCheck);
SELECT *
FROM
(
SELECT [Period], [Account], [Value]
FROM TableName
) AS source
PIVOT
(
MAX([Value])
FOR [Period] IN ([2000], [2001], [2002])
) as pvt
Another way,
SELECT ACCOUNT,
MAX(CASE WHEN Period = '2000' THEN Value ELSE NULL END) [2000],
MAX(CASE WHEN Period = '2001' THEN Value ELSE NULL END) [2001],
MAX(CASE WHEN Period = '2002' THEN Value ELSE NULL END) [2002]
FROM tableName
GROUP BY Account
You can use cut
to access the second field:
cut -f2
Edit:
Sorry, didn't realise that SVN doesn't use tabs in its output, so that's a bit useless. You can tailor cut
to the output but it's a bit fragile - something like cut -c 10-
would work, but the exact value will depend on your setup.
Another option is something like: sed 's/.\s\+//'
According to the documentation of the PropertyFile
task, you can append the generated properties to an existing file. You could have a properties file with just the comment line, and have the Ant task append the generated properties.
Hope this easy one liner helps:
cols_as_np = df[df.columns[1:]].to_numpy()
The most important question is: what do you mean by 'loading'? If you are talking about the physical element being mounted, some of the first answers here are great. However, if the first thing your app does is check for authentication, what you are really loading is data from the backend whether the user passed a cookie that labels them an authorized or unauthorized user.
This is based around redux, but you can do easily change it to plain react state model.
action creator:
export const getTodos = () => {
return async dispatch => {
let res;
try {
res = await axios.get('/todos/get');
dispatch({
type: AUTH,
auth: true
});
dispatch({
type: GET_TODOS,
todos: res.data.todos
});
} catch (e) {
} finally {
dispatch({
type: LOADING,
loading: false
});
}
};
};
The finally part means whether the user is authed or not, the loading screen goes away after a response is received.
Here's what a component that loads it could look like:
class App extends Component {
renderLayout() {
const {
loading,
auth,
username,
error,
handleSidebarClick,
handleCloseModal
} = this.props;
if (loading) {
return <Loading />;
}
return (
...
);
}
...
componentDidMount() {
this.props.getTodos();
}
...
render() {
return this.renderLayout();
}
}
If state.loading is truthy, we will always see a loading screen. On componentDidMount, we call our getTodos function, which is an action creator that turns state.loading falsy when we get a response (which can be an error). Our component updates, calls render again, and this time there is no loading screen because of the if statement.
Got similar issue. Did following steps, issue resolved:
You can make all warnings being treated as such using -Wno-error
. You can make specific warnings being treated as such by using -Wno-error=<warning name>
where <warning name>
is the name of the warning you don't want treated as an error.
If you want to entirely disable all warnings, use -w
(not recommended).
Source: http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Warning-Options.html
If you're looking to scatter by two variables and color by the third, Altair can be a great choice.
import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
df = pd.DataFrame(40*np.random.randn(10, 3), columns=['A', 'B','C'])
Altair plot
from altair import *
Chart(df).mark_circle().encode(x='A',y='B', color='C').configure_cell(width=200, height=150)
Proxies are classes that are created and loaded at runtime. There is no source code for these classes. I know that you are wondering how you can make them do something if there is no code for them. The answer is that when you create them, you specify an object that implements InvocationHandler
, which defines a method that is invoked when a proxy method is invoked.
You create them by using the call
Proxy.newProxyInstance(classLoader, interfaces, invocationHandler)
The arguments are:
classLoader
. Once the class is generated, it is loaded with this class loader.interfaces
. An array of class objects that must all be interfaces. The resulting proxy implements all of these interfaces.invocationHandler
. This is how your proxy knows what to do when a method is invoked. It is an object that implements InvocationHandler
. When a method from any of the supported interfaces, or hashCode
, equals
, or toString
, is invoked, the method invoke
is invoked on the handler, passing the Method
object for the method to be invoked and the arguments passed.For more on this, see the documentation for the Proxy
class.
Every implementation of a JVM after version 1.3 must support these. They are loaded into the internal data structures of the JVM in an implementation-specific way, but it is guaranteed to work.
The question asked:
Is there an automatic refactoring included?
I want to make bulk refactoring, but I don't know how. I worked two years with Eclipse and in Eclipse it's a one-click operation.
Well, almost one-click with automatic refactoring, but just one small step first, i.e., just the small step to create the new package. Here is the full solution below.
You can rename a package by creating a new package (including the required folder path) and then drag-and-drop over from the old package (and let Android Studio take care of the refactoring of the various references from the old package to the new), as follows:
java
under app
. New
and Package
NB: since application ID and package name are decoupled these days, note that the above is only for renaming the package name. For changing the application ID, you can do that in your build.gradle
.
Just came across this problem myself, and the only solution I could find that worked in all my test browsers (IE6, IE7, Firefox) was the following:
The code:
<div style="width: 100%">
<div style="padding-right: 6px;">
<input type="text" style="width: 100%; padding: 2px; margin: 0;
border : solid 1px #999" />
</div>
</div>
Here, the total horizontal overflow for the input element is 6px - 2x(padding + border) - so we set a padding-right for the inner DIV of 6px.
To get a third order polynomial in x (x^3), you can do
lm(y ~ x + I(x^2) + I(x^3))
or
lm(y ~ poly(x, 3, raw=TRUE))
You could fit a 10th order polynomial and get a near-perfect fit, but should you?
EDIT: poly(x, 3) is probably a better choice (see @hadley below).
Use: INT(11)
.
MySQL indexes will be able to parse through an int list fastest.
Use: BINARY(x)
, or BLOB(x)
.
You can store security tokens, etc., as hex directly in BINARY(x) or BLOB(x). To retrieve from binary
-type, use SELECT HEX(field)...
or SELECT ... WHERE field = UNHEX("ABCD....")
.
Use: DATETIME
, DATE
, or TIME
.
Always use DATETIME
if you need to store both date and time (instead of a pair of fields), as a DATETIME
indexing is more amenable to date-comparisons in MySQL.
Use: BIT(1)
(MySQL 8-only.) Otherwise, use BOOLEAN(1)
.
BOOLEAN
is actually just an alias of TINYINT(1)
, which actually stores 0 to 255 (not exactly a true/false, is it?).
Use: INT(11)
.
VARCHAR or other types of fields won't work with the SUM()
, etc., functions.
Use: TEXT.
Max limit is 65,535.
Use: MEDIUMTEXT.
Max limit is 16,777,215.
Use: LONGTEXT.
Max limit is 4,294,967,295.
Use : VARCHAR(255)
.
UTF-8 characters can take up three characters per visible character, and some cultures do not distinguish firstname and lastname. Additionally, cultures may have disagreements about which name is first and which name is last. You should name these fields Person.GivenName
and Person.FamilyName
.
Use : VARCHAR(256)
.
The definition of an e-mail path is set in RFC821 in 1982. The maximum limit of an e-mail was set by RFC2821 in 2001, and these limits were kept unchanged by RFC5321 in 2008. (See the section: 4.5.3.1. Size Limits and Minimums.) RFC3696, published 2004, mistakenly cites the email address limit as 320
characters, but this was an "info-only" RFC that explicitly "defines no standards" according to its intro, so disregard it.
Use: VARCHAR(255)
.
You never know when the phone number will be in the form of "1800...", or "1-800", or "1-(800)", or if it will end with "ext. 42", or "ask for susan".
Use: VARCHAR(10)
.
You'll get data like 12345
or 12345-6789
. Use validation to cleanse this input.
Use: VARCHAR(2000)
.
Official standards support URL's much longer than this, but few modern browsers support URL's over 2,000 characters. See this SO answer: What is the maximum length of a URL in different browsers?
Use: DECIMAL(11,2)
.
It goes up to 11.
Short circuiting means the second operator will not be checked if the first operator decides the final outcome.
E.g. Expression is: True || False
In case of ||, all we need is one of the side to be True. So if the left hand side is true, there is no point in checking the right hand side, and hence that will not be checked at all.
Similarly, False && True
In case of &&, we need both sides to be True. So if the left hand side is False, there is no point in checking the right hand side, the answer has to be False. And hence that will not be checked at all.
BEGIN;
INSERT INTO test_b (price_sum)
SELECT price
FROM test_a;
INSERT INTO test_c (price_summ)
SELECT price
FROM test_a;
COMMIT;
Believe me I have tried a lot of options to do that and I have answer here
but I always look for the best practice and the best way I know so far for both front-end and back-end developers is for loop
(yes I'm not kidding)
Because when the front-end gives you the UI Pages with dummy data he also added classes and some inline styles on specific select option so its hard to deal
with using HtmlHelper
Take look at this :
<select class="input-lg" style="">
<option value="0" style="color:#ccc !important;">
Please select the membership name to be searched for
</option>
<option value="1">11</option>
<option value="2">22</option>
<option value="3">33</option>
<option value="4">44</option>
</select>
this from the front-end developer so best solution is to use the for loop
fristly create
or get your list
of data from (...) in the Controller Action and put it in ViewModel, ViewBag or whatever
//This returns object that contain Items and TotalCount
ViewBag.MembershipList = await _membershipAppService.GetAllMemberships();
Secondly in the view do this simple for loop to populate the dropdownlist
<select class="input-lg" name="PrerequisiteMembershipId" id="PrerequisiteMembershipId">
<option value="" style="color:#ccc !important;">
Please select the membership name to be searched for
</option>
@foreach (var item in ViewBag.MembershipList.Items)
{
<option value="@item.Id" @(Model.PrerequisiteMembershipId == item.Id ? "selected" : "")>
@item.Name
</option>
}
</select>
in this way you will not break UI Design, and its simple , easy and more readable
hope this help you even if you did not used razor
Switch is not a good way to go as it breaks the Open Close Principal. This is how I do it.
public class Animal
{
public abstract void Speak();
}
public class Dog : Animal
{
public virtual void Speak()
{
Console.WriteLine("Hao Hao");
}
}
public class Cat : Animal
{
public virtual void Speak()
{
Console.WriteLine("Meauuuu");
}
}
And here is how to use it (taking your code):
foreach (var animal in zoo)
{
echo animal.speak();
}
Basically what we are doing is delegating the responsibility to the child class instead of having the parent decide what to do with children.
You might also want to read up on "Liskov Substitution Principle".
Use the push()
function to append to an array:
// initialize array
var arr = [
"Hi",
"Hello",
"Bonjour"
];
// append new value to the array
arr.push("Hola");
Now array is
var arr = [
"Hi",
"Hello",
"Bonjour"
"Hola"
];
// append multiple values to the array
arr.push("Salut", "Hey");
Now array is
var arr = [
"Hi",
"Hello",
"Bonjour"
"Hola"
"Salut"
"Hey"
];
// display all values
for (var i = 0; i < arr.length; i++) {
console.log(arr[i]);
}
Will print:
Hi
Hello
Bonjour
Hola
Salut
Hey
Update
If you want to add the items of one array to another array, you can use Array.concat:
var arr = [
"apple",
"banana",
"cherry"
];
arr = arr.concat([
"dragonfruit",
"elderberry",
"fig"
]);
console.log(arr);
Will print
["apple", "banana", "cherry", "dragonfruit", "elderberry", "fig"]
If you want the actual HTTP Host header, see Daniel Roseman's comment on @Phsiao's answer. The other alternative is if you're using the contrib.sites framework, you can set a canonical domain name for a Site in the database (mapping the request domain to a settings file with the proper SITE_ID is something you have to do yourself via your webserver setup). In that case you're looking for:
from django.contrib.sites.models import Site
current_site = Site.objects.get_current()
current_site.domain
you'd have to put the current_site object into a template context yourself if you want to use it. If you're using it all over the place, you could package that up in a template context processor.
As somebody else already said, your design is not very clear and Object Oriented.
The most obvious error is that in your design a Card knows about a Deck of Cards. The Deck should know about cards and instantiate objects in its constructor. For Example:
public class DeckOfCards {
private Card cards[];
public DeckOfCards() {
this.cards = new Card[52];
for (int i = 0; i < ; i++) {
Card card = new Card(...); //Instantiate a Card
this.cards[i] = card; //Adding card to the Deck
}
}
Afterwards, if you want you can also extend Deck in order to build different Deck of Cards (for example with more than 52 cards, Jolly etc.). For Example:
public class SpecialDeck extends DeckOfCards {
....
Another thing that I'd change is the use of String arrays to represent suits and ranks. Since Java 1.5, the language supports Enumeration, which are perfect for this kind of problems. For Example:
public enum Suits {
SPADES,
HEARTS,
DIAMONDS,
CLUBS;
}
With Enum you get some benefits, for example:
1) Enum is type-safe you can not assign anything else other than predefined Enum constants to an Enum variable. For Example, you could write your Card's constructor as following:
public class Card {
private Suits suit;
private Ranks rank;
public Card(Suits suit, Ranks rank) {
this.suit = suit;
this.rank = rank;
}
This way you are sure to build consistent cards that accept only values ??of your enumeration.
2) You can use Enum in Java inside Switch statement like int or char primitive data type (here we have to say that since Java 1.7 switch statement is allowed also on String)
3) Adding new constants on Enum in Java is easy and you can add new constants without breaking existing code.
4) You can iterate through Enum, this can be very helpful when instantiating Cards. For Example:
/* Creating all possible cards... */
for (Suits s : Suits.values()) {
for (Ranks r : Ranks.values()) {
Card c = new Card(s,r);
}
}
In order to not invent again the wheel, I'd also change the way you keep Cards from array to a Java Collection, this way you get a lot of powerful methods to work on your deck, but most important you can use the Java Collection's shuffle function to shuffle your Deck. For example:
private List<Card> cards = new ArrayList<Card>();
//Building the Deck...
//...
public void shuffle() {
Collections.shuffle(this.cards);
}
As far as I understand, you create a Movie class:
class Movie
{
private:
std::string _title;
std::string _director;
int _year;
int _rating;
std::vector<std::string> actors;
};
and having such class, you create a vector instance:
std::vector<Movie*> movies;
so, you can add any movie to your movies collection. Since you are creating a vector of pointers to movies, do not forget to free the resources allocated by your movie instances OR you could use some smart pointer to deallocate the movies automatically:
std::vector<shared_ptr<Movie>> movies;
You might want to use encodeURIComponent().
encodeURIComponent(""Busola""); // => %26quot%3BBusola%26quot%3B
This is the class where the connection is established and messages are recieved. Make sure to pair the devices before you run the application. If you want to have a slave/master connection, where each slave can only send messages to the master , and the master can broadcast messages to all slaves. You should only pair the master with each slave , but you shouldn't pair the slaves together.
package com.example.gaby.coordinatorv1;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Set;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.Toast;
public class Piconet {
private final static String TAG = Piconet.class.getSimpleName();
// Name for the SDP record when creating server socket
private static final String PICONET = "ANDROID_PICONET_BLUETOOTH";
private final BluetoothAdapter mBluetoothAdapter;
// String: device address
// BluetoothSocket: socket that represent a bluetooth connection
private HashMap<String, BluetoothSocket> mBtSockets;
// String: device address
// Thread: thread for connection
private HashMap<String, Thread> mBtConnectionThreads;
private ArrayList<UUID> mUuidList;
private ArrayList<String> mBtDeviceAddresses;
private Context context;
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
Toast.makeText(context, msg.getData().getString("msg"), Toast.LENGTH_SHORT).show();
break;
default:
break;
}
};
};
public Piconet(Context context) {
this.context = context;
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mBtSockets = new HashMap<String, BluetoothSocket>();
mBtConnectionThreads = new HashMap<String, Thread>();
mUuidList = new ArrayList<UUID>();
mBtDeviceAddresses = new ArrayList<String>();
// Allow up to 7 devices to connect to the server
mUuidList.add(UUID.fromString("a60f35f0-b93a-11de-8a39-08002009c666"));
mUuidList.add(UUID.fromString("54d1cc90-1169-11e2-892e-0800200c9a66"));
mUuidList.add(UUID.fromString("6acffcb0-1169-11e2-892e-0800200c9a66"));
mUuidList.add(UUID.fromString("7b977d20-1169-11e2-892e-0800200c9a66"));
mUuidList.add(UUID.fromString("815473d0-1169-11e2-892e-0800200c9a66"));
mUuidList.add(UUID.fromString("503c7434-bc23-11de-8a39-0800200c9a66"));
mUuidList.add(UUID.fromString("503c7435-bc23-11de-8a39-0800200c9a66"));
Thread connectionProvider = new Thread(new ConnectionProvider());
connectionProvider.start();
}
public void startPiconet() {
Log.d(TAG, " -- Looking devices -- ");
// The devices must be already paired
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter
.getBondedDevices();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
// X , Y and Z are the Bluetooth name (ID) for each device you want to connect to
if (device != null && (device.getName().equalsIgnoreCase("X") || device.getName().equalsIgnoreCase("Y")
|| device.getName().equalsIgnoreCase("Z") || device.getName().equalsIgnoreCase("M"))) {
Log.d(TAG, " -- Device " + device.getName() + " found --");
BluetoothDevice remoteDevice = mBluetoothAdapter
.getRemoteDevice(device.getAddress());
connect(remoteDevice);
}
}
} else {
Toast.makeText(context, "No paired devices", Toast.LENGTH_SHORT).show();
}
}
private class ConnectionProvider implements Runnable {
@Override
public void run() {
try {
for (int i=0; i<mUuidList.size(); i++) {
BluetoothServerSocket myServerSocket = mBluetoothAdapter
.listenUsingRfcommWithServiceRecord(PICONET, mUuidList.get(i));
Log.d(TAG, " ** Opened connection for uuid " + i + " ** ");
// This is a blocking call and will only return on a
// successful connection or an exception
Log.d(TAG, " ** Waiting connection for socket " + i + " ** ");
BluetoothSocket myBTsocket = myServerSocket.accept();
Log.d(TAG, " ** Socket accept for uuid " + i + " ** ");
try {
// Close the socket now that the
// connection has been made.
myServerSocket.close();
} catch (IOException e) {
Log.e(TAG, " ** IOException when trying to close serverSocket ** ");
}
if (myBTsocket != null) {
String address = myBTsocket.getRemoteDevice().getAddress();
mBtSockets.put(address, myBTsocket);
mBtDeviceAddresses.add(address);
Thread mBtConnectionThread = new Thread(new BluetoohConnection(myBTsocket));
mBtConnectionThread.start();
Log.i(TAG," ** Adding " + address + " in mBtDeviceAddresses ** ");
mBtConnectionThreads.put(address, mBtConnectionThread);
} else {
Log.e(TAG, " ** Can't establish connection ** ");
}
}
} catch (IOException e) {
Log.e(TAG, " ** IOException in ConnectionService:ConnectionProvider ** ", e);
}
}
}
private class BluetoohConnection implements Runnable {
private String address;
private final InputStream mmInStream;
public BluetoohConnection(BluetoothSocket btSocket) {
InputStream tmpIn = null;
try {
tmpIn = new DataInputStream(btSocket.getInputStream());
} catch (IOException e) {
Log.e(TAG, " ** IOException on create InputStream object ** ", e);
}
mmInStream = tmpIn;
}
@Override
public void run() {
byte[] buffer = new byte[1];
String message = "";
while (true) {
try {
int readByte = mmInStream.read();
if (readByte == -1) {
Log.e(TAG, "Discarting message: " + message);
message = "";
continue;
}
buffer[0] = (byte) readByte;
if (readByte == 0) { // see terminateFlag on write method
onReceive(message);
message = "";
} else { // a message has been recieved
message += new String(buffer, 0, 1);
}
} catch (IOException e) {
Log.e(TAG, " ** disconnected ** ", e);
}
mBtDeviceAddresses.remove(address);
mBtSockets.remove(address);
mBtConnectionThreads.remove(address);
}
}
}
/**
* @param receiveMessage
*/
private void onReceive(String receiveMessage) {
if (receiveMessage != null && receiveMessage.length() > 0) {
Log.i(TAG, " $$$$ " + receiveMessage + " $$$$ ");
Bundle bundle = new Bundle();
bundle.putString("msg", receiveMessage);
Message message = new Message();
message.what = 1;
message.setData(bundle);
handler.sendMessage(message);
}
}
/**
* @param device
* @param uuidToTry
* @return
*/
private BluetoothSocket getConnectedSocket(BluetoothDevice device, UUID uuidToTry) {
BluetoothSocket myBtSocket;
try {
myBtSocket = device.createRfcommSocketToServiceRecord(uuidToTry);
myBtSocket.connect();
return myBtSocket;
} catch (IOException e) {
Log.e(TAG, "IOException in getConnectedSocket", e);
}
return null;
}
private void connect(BluetoothDevice device) {
BluetoothSocket myBtSocket = null;
String address = device.getAddress();
BluetoothDevice remoteDevice = mBluetoothAdapter.getRemoteDevice(address);
// Try to get connection through all uuids available
for (int i = 0; i < mUuidList.size() && myBtSocket == null; i++) {
// Try to get the socket 2 times for each uuid of the list
for (int j = 0; j < 2 && myBtSocket == null; j++) {
Log.d(TAG, " ** Trying connection..." + j + " with " + device.getName() + ", uuid " + i + "...** ");
myBtSocket = getConnectedSocket(remoteDevice, mUuidList.get(i));
if (myBtSocket == null) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
Log.e(TAG, "InterruptedException in connect", e);
}
}
}
}
if (myBtSocket == null) {
Log.e(TAG, " ** Could not connect ** ");
return;
}
Log.d(TAG, " ** Connection established with " + device.getName() +"! ** ");
mBtSockets.put(address, myBtSocket);
mBtDeviceAddresses.add(address);
Thread mBluetoohConnectionThread = new Thread(new BluetoohConnection(myBtSocket));
mBluetoohConnectionThread.start();
mBtConnectionThreads.put(address, mBluetoohConnectionThread);
}
public void bluetoothBroadcastMessage(String message) {
//send message to all except Id
for (int i = 0; i < mBtDeviceAddresses.size(); i++) {
sendMessage(mBtDeviceAddresses.get(i), message);
}
}
private void sendMessage(String destination, String message) {
BluetoothSocket myBsock = mBtSockets.get(destination);
if (myBsock != null) {
try {
OutputStream outStream = myBsock.getOutputStream();
final int pieceSize = 16;
for (int i = 0; i < message.length(); i += pieceSize) {
byte[] send = message.substring(i,
Math.min(message.length(), i + pieceSize)).getBytes();
outStream.write(send);
}
// we put at the end of message a character to sinalize that message
// was finished
byte[] terminateFlag = new byte[1];
terminateFlag[0] = 0; // ascii table value NULL (code 0)
outStream.write(new byte[1]);
} catch (IOException e) {
Log.d(TAG, "line 278", e);
}
}
}
}
Your main activity should be as follow :
package com.example.gaby.coordinatorv1;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
private Button discoveryButton;
private Button messageButton;
private Piconet piconet;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
piconet = new Piconet(getApplicationContext());
messageButton = (Button) findViewById(R.id.messageButton);
messageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
piconet.bluetoothBroadcastMessage("Hello World---*Gaby Bou Tayeh*");
}
});
discoveryButton = (Button) findViewById(R.id.discoveryButton);
discoveryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
piconet.startPiconet();
}
});
}
}
And here's the XML Layout :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<Button
android:id="@+id/discoveryButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Discover"
/>
<Button
android:id="@+id/messageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send message"
/>
Do not forget to add the following permissions to your Manifest File :
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
If that <p>
tag is created from JavaScript, then you do have another option: use JSS to programmatically insert stylesheets into the document head. It does support '&:hover'
. https://cssinjs.org/
Import cars data
import pandas as pd
cars = pd.read_csv('cars.csv', index_col = 0)
Here is how the cars.csv file looks.
Print out drives_right column as Series:
print(cars.loc[:,"drives_right"])
US True
AUS False
JAP False
IN False
RU True
MOR True
EG True
Name: drives_right, dtype: bool
The single bracket version gives a Pandas Series, the double bracket version gives a Pandas DataFrame.
Print out drives_right column as DataFrame
print(cars.loc[:,["drives_right"]])
drives_right
US True
AUS False
JAP False
IN False
RU True
MOR True
EG True
Adding a Series to another Series creates a DataFrame.
I wish comments had proper code text formatting, because I think @1_CR 's answer needs more bumps, and I would like to augment his answer. Anyway, He led me to the following technique; it will use cStringIO if available (BUT NOTE: cStringIO and StringIO are not the same, because you cannot subclass cStringIO... it is a built-in... but for basic operations the syntax will be identical, so you can do this):
try:
import cStringIO
StringIO = cStringIO
except ImportError:
import StringIO
for line in StringIO.StringIO(variable_with_multiline_string):
pass
print line.strip()
Based on solution by Pavel Cerný here we can make an universal typed implementation of this pattern. To to it, we need to introduce NamedService interface:
public interface NamedService {
String name();
}
and add abstract class:
public abstract class AbstractFactory<T extends NamedService> {
private final Map<String, T> map;
protected AbstractFactory(List<T> list) {
this.map = list
.stream()
.collect(Collectors.toMap(NamedService::name, Function.identity()));
}
/**
* Factory method for getting an appropriate implementation of a service
* @param name name of service impl.
* @return concrete service impl.
*/
public T getInstance(@NonNull final String name) {
T t = map.get(name);
if(t == null)
throw new RuntimeException("Unknown service name: " + name);
return t;
}
}
Then we create a concrete factory of specific objects like MyService:
public interface MyService extends NamedService {
String name();
void doJob();
}
@Component
public class MyServiceFactory extends AbstractFactory<MyService> {
@Autowired
protected MyServiceFactory(List<MyService> list) {
super(list);
}
}
where List the list of implementations of MyService interface at compile time.
This approach works fine if you have multiple similar factories across app that produce objects by name (if producing objects by a name suffice you business logic of course). Here map works good with String as a key, and holds all the existing implementations of your services.
if you have different logic for producing objects, this additional logic can be moved to some another place and work in combination with these factories (that get objects by name).
Try this:
.countTable table tr td:first-child + td
You could also reiterate in order to style the others columns:
.countTable table tr td:first-child + td + td {...} /* third column */
.countTable table tr td:first-child + td + td + td {...} /* fourth column */
.countTable table tr td:first-child + td + td + td +td {...} /* fifth column */
You can reboot the device by sending the following broadcast:
$ adb shell am broadcast -a android.intent.action.BOOT_COMPLETED
typeperf
gives me issues when it randomly doesn't work on some computers (Error: No valid counters.
) or if the account has insufficient rights. Otherwise, here is a way to extract just the value from its output. It still needs rounding though:
@for /f "delims=, tokens=2" %p in ('typeperf "\Processor(_Total)\% Processor Time" -sc 3 ^| find ":"') do @echo %~p%
Powershell has two cmdlets to get the percent utilization for all CPUs: Get-Counter
(preferred) or Get-WmiObject
:
Powershell "Get-Counter '\Processor(*)\% Processor Time' | Select -Expand Countersamples | Select InstanceName, CookedValue"
Or,
Powershell "Get-WmiObject Win32_PerfFormattedData_PerfOS_Processor | Select Name, PercentProcessorTime"
To get the overall CPU load with formatted output exactly like the question:
Powershell "[string][int](Get-Counter '\Processor(*)\% Processor Time').Countersamples[0].CookedValue + '%'"
Or,
Powershell "gwmi Win32_PerfFormattedData_PerfOS_Processor | Select -First 1 | %{'{0}%' -f $_.PercentProcessorTime}"
You're close. For arbitrary values, try something like the following:
public enum Day {
MONDAY("M"), TUESDAY("T"), WEDNESDAY("W"),
THURSDAY("R"), FRIDAY("F"), SATURDAY("Sa"), SUNDAY("Su"), ;
private final String abbreviation;
// Reverse-lookup map for getting a day from an abbreviation
private static final Map<String, Day> lookup = new HashMap<String, Day>();
static {
for (Day d : Day.values()) {
lookup.put(d.getAbbreviation(), d);
}
}
private Day(String abbreviation) {
this.abbreviation = abbreviation;
}
public String getAbbreviation() {
return abbreviation;
}
public static Day get(String abbreviation) {
return lookup.get(abbreviation);
}
}
The same may be achieved with the stringi package:
library('stringi')
char_array <- c("foo_bar","bar_foo","apple","beer")
a <- data.frame("data"=char_array, "data2"=1:4)
(a$data <- stri_sub(a$data, 1, -4)) # from the first to the last but 4th char
## [1] "foo_" "bar_" "ap" "b"
ls F00001-0708-*|sed 's|^F0000\(.*\)|mv & F000\1|' | bash
Contents of the Answer
1) How to access Model data in Javascript/Jquery code block in
.cshtml
file2) How to access Model data in Javascript/Jquery code block in
.js
file
.cshtml
fileThere are two types of c# variable (Model
) assignments to JavaScript variable.
int
, string
, DateTime
(ex: Model.Name
)Model
, Model.UserSettingsObj
)Lets look into the details of these two assignments.
For the rest of the answer lets consider the below AppUser
Model as an example.
public class AppUser
{
public string Name { get; set; }
public bool IsAuthenticated { get; set; }
public DateTime LoginDateTime { get; set; }
public int Age { get; set; }
public string UserIconHTML { get; set; }
}
And the values we assign this Model are
AppUser appUser = new AppUser
{
Name = "Raj",
IsAuthenticated = true,
LoginDateTime = DateTime.Now,
Age = 26,
UserIconHTML = "<i class='fa fa-users'></i>"
};
Lets use different syntax for assignment and observe the results.
1) Without wrapping property assignment in quotes.
var Name = @Model.Name;
var Age = @Model.Age;
var LoginTime = @Model.LoginDateTime;
var IsAuthenticated = @Model.IsAuthenticated;
var IconHtml = @Model.UserIconHTML;
As you can see there are couple of errors, Raj
and True
is considered to be javascript variables and since they dont exist its an variable undefined
error. Where as for the dateTime varialble the error is unexpected number
numbers cannot have special characters, The HTML tags are converted into its entity names so that the browser doesn't mix up your values and the HTML markup.
2) Wrapping property assignment in Quotes.
var Name = '@Model.Name';
var Age = '@Model.Age';
var LoginTime = '@Model.LoginDateTime';
var IsAuthenticated = '@Model.IsAuthenticated';
var IconHtml = '@Model.UserIconHTML';
The results are valid, So wrapping the property assignment in quotes gives us valid syntax. But note that the Number Age
is now a string, So if you dont want that we can just remove the quotes and it will be rendered as a number type.
3) Using @Html.Raw
but without wrapping it in quotes
var Name = @Html.Raw(Model.Name);
var Age = @Html.Raw(Model.Age);
var LoginTime = @Html.Raw(Model.LoginDateTime);
var IsAuthenticated = @Html.Raw(Model.IsAuthenticated);
var IconHtml = @Html.Raw(Model.UserIconHTML);
The results are similar to our test case 1. However using @Html.Raw()
on the HTML
string did show us some change. The HTML is retained without changing to its entity names.
From the docs Html.Raw()
Wraps HTML markup in an HtmlString instance so that it is interpreted as HTML markup.
But still we have errors in other lines.
4) Using @Html.Raw
and also wrapping it within quotes
var Name ='@Html.Raw(Model.Name)';
var Age = '@Html.Raw(Model.Age)';
var LoginTime = '@Html.Raw(Model.LoginDateTime)';
var IsAuthenticated = '@Html.Raw(Model.IsAuthenticated)';
var IconHtml = '@Html.Raw(Model.UserIconHTML)';
The results are good with all types. But our HTML
data is now broken and this will break the scripts. The issue is because we are using single quotes '
to wrap the the data and even the data has single quotes.
We can overcome this issue with 2 approaches.
1) use double quotes " "
to wrap the HTML part. As the inner data has only single quotes. (Be sure that after wrapping with double quotes there are no "
within the data too)
var IconHtml = "@Html.Raw(Model.UserIconHTML)";
2) Escape the character meaning in your server side code. Like
UserIconHTML = "<i class=\"fa fa-users\"></i>"
Conclusion of property assignment
Html.Raw
to interpret your HTML data as is.Lets use different syntax for assignment and observe the results.
1) Without wrapping object assignment in quotes.
var userObj = @Model;
When you assign a c# object to javascript variable the value of the .ToString()
of that oject will be assigned. Hence the above result.
2 Wrapping object assignment in quotes
var userObj = '@Model';
3) Using Html.Raw
without quotes.
var userObj = @Html.Raw(Model);
4) Using Html.Raw
along with quotes
var userObj = '@Html.Raw(Model)';
The Html.Raw
was of no much use for us while assigning a object to variable.
5) Using Json.Encode()
without quotes
var userObj = @Json.Encode(Model);
//result is like
var userObj = {"Name":"Raj",
"IsAuthenticated":true,
"LoginDateTime":"\/Date(1482572875150)\/",
"Age":26,
"UserIconHTML":"\u003ci class=\"fa fa-users\"\u003e\u003c/i\u003e"
};
We do see some change, We see our Model is being interpreted as a object. But we have those special characters changed into entity names
. Also wrapping the above syntax in quotes is of no much use. We simply get the same result within quotes.
From the docs of Json.Encode()
Converts a data object to a string that is in the JavaScript Object Notation (JSON) format.
As you have already encountered this entity Name
issue with property assignment and if you remember we overcame it with the use of Html.Raw
. So lets try that out. Lets combine Html.Raw
and Json.Encode
6) Using Html.Raw
and Json.Encode
without quotes.
var userObj = @Html.Raw(Json.Encode(Model));
Result is a valid Javascript Object
var userObj = {"Name":"Raj",
"IsAuthenticated":true,
"LoginDateTime":"\/Date(1482573224421)\/",
"Age":26,
"UserIconHTML":"\u003ci class=\"fa fa-users\"\u003e\u003c/i\u003e"
};
7) Using Html.Raw
and Json.Encode
within quotes.
var userObj = '@Html.Raw(Json.Encode(Model))';
As you see wrapping with quotes gives us a JSON data
Conslusion on Object assignment
Html.Raw
and Json.Encode
in combintaion to assign your object to javascript variable as JavaScript object.Html.Raw
and Json.Encode
also wrap it within quotes
to get a JSONNote: If you have observed the DataTime data format is not right. This is because as said earlier Converts a data object to a string that is in the JavaScript Object Notation (JSON) format
and JSON does not contain a date
type. Other options to fix this is to add another line of code to handle this type alone using javascipt Date() object
var userObj.LoginDateTime = new Date('@Html.Raw(Model.LoginDateTime)');
//without Json.Encode
.js
fileRazor syntax has no meaning in .js
file and hence we cannot directly use our Model insisde a .js
file. However there is a workaround.
1) Solution is using javascript Global variables.
We have to assign the value to a global scoped javascipt variable and then use this variable within all code block of your .cshtml
and .js
files. So the syntax would be
<script type="text/javascript">
var userObj = @Html.Raw(Json.Encode(Model)); //For javascript object
var userJsonObj = '@Html.Raw(Json.Encode(Model))'; //For json data
</script>
With this in place we can use the variables userObj
and userJsonObj
as and when needed.
Note: I personally dont suggest using global variables as it gets very hard for maintainance. However if you have no other option then you can use it with having a proper naming convention .. something like userAppDetails_global
.
2) Using function() or closure
Wrap all the code that is dependent on the model data in a function. And then execute this function from the .cshtml
file .
external.js
function userDataDependent(userObj){
//.... related code
}
.cshtml
file
<script type="text/javascript">
userDataDependent(@Html.Raw(Json.Encode(Model))); //execute the function
</script>
Note: Your external file must be referenced prior to the above script. Else the userDataDependent
function is undefined.
Also note that the function must be in global scope too. So either solution we have to deal with global scoped players.
The latter is preferred, because it will handle subclasses properly. In fact, your example can be written even more easily because isinstance()
's second parameter may be a tuple:
if isinstance(b, (str, unicode)):
do_something_else()
or, using the basestring
abstract class:
if isinstance(b, basestring):
do_something_else()
To match anything other than letter or number or letter with diacritics like é
you could try this:
[^\wÀ-úÀ-ÿ]
And to replace:
var str = 'dfj,dsf7é@lfsd .sdklfàj1';
str = str.replace(/[^\wÀ-úÀ-ÿ]/g, '_');
Inspired by the top post with support for diacritics
There is a blog post with some C# sample code on how to do it here.
I posted too soon however the ways to configure are given in below link
http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html
and way to get access keys are given in below link
http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-set-up.html#cli-signup
-z string
True if the string is null (an empty string)
You need to change parameter "a" => "a+". Follow this code bellows:
def storescores():
hs = open("hst.txt","a+")
Note that in Entity Framework 6.1 (currently in beta) will support the IndexAttribute to annotate the index properties which will automatically result in a (unique) index in your Code First Migrations.
This should be a good case for map and lambda
with open ('names.txt','r') as f :
Names = map (lambda x : x.strip(),f_in.readlines())
I stand corrected (or at least improved). List comprehensions is even more elegant
with open ('names.txt','r') as f :
Names = [name.rstrip() for name in f]
I see that we have (beside others) basically two options:
a.sort_by { |h| -h[:bar] }
and
a.sort_by { |h| h[:bar] }.reverse
While both ways give you the same result when your sorting key is unique, keep in mind that the reverse
way will reverse the order of keys that are equal.
Example:
a = [{foo: 1, bar: 1},{foo: 2,bar: 1}]
a.sort_by {|h| -h[:bar]}
=> [{:foo=>1, :bar=>1}, {:foo=>2, :bar=>1}]
a.sort_by {|h| h[:bar]}.reverse
=> [{:foo=>2, :bar=>1}, {:foo=>1, :bar=>1}]
While you often don't need to care about this, sometimes you do. To avoid such behavior you could introduce a second sorting key (that for sure needs to be unique at least for all items that have the same sorting key):
a.sort_by {|h| [-h[:bar],-h[:foo]]}
=> [{:foo=>2, :bar=>1}, {:foo=>1, :bar=>1}]
a.sort_by {|h| [h[:bar],h[:foo]]}.reverse
=> [{:foo=>2, :bar=>1}, {:foo=>1, :bar=>1}]
The best option is to use the 'System.Diagnostics' namespace.
Enclose your code in if else block for debug mode and release mode as shown below to switch between debug and release mode in visual studio,
#if DEBUG // for debug mode
**Debugger.Launch();** //debugger will hit here
foreach (var job in JobFactory.GetJobs())
{
//do something
}
#else // for release mode
**Debugger.Launch();** //debugger will hit here
// write code here to do something in Release mode.
#endif
Update 2019
Why not use an input-group?
<div class="input-group col-md-4">
<input class="form-control py-2" type="search" value="search" id="example-search-input">
<span class="input-group-append">
<button class="btn btn-outline-secondary" type="button">
<i class="fa fa-search"></i>
</button>
</span>
</div>
And, you can make it appear inside the input using the border utils...
<div class="input-group col-md-4">
<input class="form-control py-2 border-right-0 border" type="search" value="search" id="example-search-input">
<span class="input-group-append">
<button class="btn btn-outline-secondary border-left-0 border" type="button">
<i class="fa fa-search"></i>
</button>
</span>
</div>
Or, using a input-group-text
w/o the gray background so the icon appears inside the input...
<div class="input-group">
<input class="form-control py-2 border-right-0 border" type="search" value="search" id="example-search-input">
<span class="input-group-append">
<div class="input-group-text bg-transparent"><i class="fa fa-search"></i></div>
</span>
</div>
Alternately, you can use the grid (row
>col-
) with no gutter spacing:
<div class="row no-gutters">
<div class="col">
<input class="form-control border-secondary border-right-0 rounded-0" type="search" value="search" id="example-search-input4">
</div>
<div class="col-auto">
<button class="btn btn-outline-secondary border-left-0 rounded-0 rounded-right" type="button">
<i class="fa fa-search"></i>
</button>
</div>
</div>
Or, prepend the icon like this...
<div class="input-group">
<span class="input-group-prepend">
<div class="input-group-text bg-transparent border-right-0">
<i class="fa fa-search"></i>
</div>
</span>
<input class="form-control py-2 border-left-0 border" type="search" value="..." id="example-search-input" />
<span class="input-group-append">
<button class="btn btn-outline-secondary border-left-0 border" type="button">
Search
</button>
</span>
</div>
Demo of all Bootstrap 4 icon input options
Use Css Selector for this, or learn more about Css Selector just go here
https://www.w3schools.com/cssref/css_selectors.asp
#main_text > .title {
/* Style goes here */
}
#main_text .title {
/* Style goes here */
}
The problem in this case is that onchange-event does not fire until the input looses focus, so you will probably want to listen for the keyup-event instead, which is fired on every keystroke.
Also, I would prefer not using inline-javascript, but rather catch the event using jQuery instead.
$("#txtConfirmPassword").keyup(checkPasswordMatch);
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefaultPrompt];
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(10.0, NSIntegerMin) forBarMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor],
NSFontAttributeName:[UIFont systemFontOfSize:1]}
forState:UIControlStateNormal];
There are several different ways to check if an argument was passed to a function. In addition to the two you mentioned in your (original) question - checking arguments.length
or using the ||
operator to provide default values - one can also explicitly check the arguments for undefined
via argument2 === undefined
or typeof argument2 === 'undefined'
if one is paranoid (see comments).
Using the ||
operator has become standard practice - all the cool kids do it - but be careful: The default value will be triggered if the argument evaluates to false
, which means it might actually be undefined
, null
, false
, 0
, ''
(or anything else for which Boolean(...)
returns false
).
So the question is when to use which check, as they all yield slightly different results.
Checking arguments.length
exhibits the 'most correct' behaviour, but it might not be feasible if there's more than one optional argument.
The test for undefined
is next 'best' - it only 'fails' if the function is explicitly called with an undefined
value, which in all likelyhood should be treated the same way as omitting the argument.
The use of the ||
operator might trigger usage of the default value even if a valid argument is provided. On the other hand, its behaviour might actually be desired.
To summarize: Only use it if you know what you're doing!
In my opinion, using ||
is also the way to go if there's more than one optional argument and one doesn't want to pass an object literal as a workaround for named parameters.
Another nice way to provide default values using arguments.length
is possible by falling through the labels of a switch statement:
function test(requiredArg, optionalArg1, optionalArg2, optionalArg3) {
switch(arguments.length) {
case 1: optionalArg1 = 'default1';
case 2: optionalArg2 = 'default2';
case 3: optionalArg3 = 'default3';
case 4: break;
default: throw new Error('illegal argument count')
}
// do stuff
}
This has the downside that the programmer's intention is not (visually) obvious and uses 'magic numbers'; it is therefore possibly error prone.
the problem is you're trying to use regex features not supported by grep. namely, your \d
won't work. use this instead:
REGEX_DATE="^[[:digit:]]{2}[-/][[:digit:]]{2}[-/][[:digit:]]{4}$"
echo "$1" | grep -qE "${REGEX_DATE}"
echo $?
you need the -E
flag to get ERE in order to use {#}
style.
Thanks to your comments. I've made a function that give an error message when it happens:
/**
* Replaces a string in a file
*
* @param string $FilePath
* @param string $OldText text to be replaced
* @param string $NewText new text
* @return array $Result status (success | error) & message (file exist, file permissions)
*/
function replace_in_file($FilePath, $OldText, $NewText)
{
$Result = array('status' => 'error', 'message' => '');
if(file_exists($FilePath)===TRUE)
{
if(is_writeable($FilePath))
{
try
{
$FileContent = file_get_contents($FilePath);
$FileContent = str_replace($OldText, $NewText, $FileContent);
if(file_put_contents($FilePath, $FileContent) > 0)
{
$Result["status"] = 'success';
}
else
{
$Result["message"] = 'Error while writing file';
}
}
catch(Exception $e)
{
$Result["message"] = 'Error : '.$e;
}
}
else
{
$Result["message"] = 'File '.$FilePath.' is not writable !';
}
}
else
{
$Result["message"] = 'File '.$FilePath.' does not exist !';
}
return $Result;
}
You should start using jQuery or some other js lib. It's way easier than js, and you can use it as a shorthand for most js instead of actually long, drawn out js.
Simply put <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
(or whatever the latest google cdn is https://developers.google.com/speed/libraries/devguide#jquery) in your <head>
.
Then, inside your event
code (much easier if you use jQuery: $.click()
for buttons, $.change()
for checkboxes, selects, radios...), put the code from your second link looking more like
$('#theIDofTheButtonThatTriggersThisAnimation').click(function(){
$('#theIDofTheElementYouWantToSmoothlyScroll').animate({
scrollTop: 0
}, 2000);
});
However, if you're trying to do animations, I recommend you look into some basic css properties like position:absolute
and position:relative
to keep from going crazy.
I'm still not quite sure what's going on in your code because it's very non-standard relative to how things are done now with css & jQuery. I'd break it down into something simple to learn the general concept.
For your example, you should build off of my animation example, how I learned: https://stackoverflow.com/a/12906254/1382306
I think you're trying to move your text up and down based upon a $.click()
. In the fiddle in my answer, it slides left and right. You can easily reformat up and down by using the css top
property instead of left
.
Once you figure out how to move the entire div
up and down, you can make a relative
container to hold all of the content absolute
div
s and manipulate all content div
s with a loop by setting their top
s. Here's a quick primer on absolute
in relative
: http://css-tricks.com/absolute-positioning-inside-relative-positioning/
All of my animations have relative
containers and absolute
content. It's how I made a custom gridview plugin that can instantly zip through an entire database.
Also, there really is no overuse of div
s when it comes to animating. Trying to make 1 div
do everything is a nightmare.
Try to see if you can reformat my fiddle into a vertical slide out. Once you've done that, research absolute
in relative
a little. If you have any more problems, just ask another question.
Change your thinking to these philosophies, and you'll start flying through this type of coding.
It's not the same doing a select distinct at the beginning because you are wasting all the calculated rows from the result.
select a.FirstName, a.LastName, v.District
from AddTbl a order by Firstname
natural join (select distinct LastName from
ValTbl v where a.LastName = v.LastName)
try that.
POSIX sed
(and for example OS X's sed
, the sed
below) require i
to be followed by a backslash and a newline. Also at least OS X's sed
does not include a newline after the inserted text:
$ seq 3|gsed '2i1.5'
1
1.5
2
3
$ seq 3|sed '2i1.5'
sed: 1: "2i1.5": command i expects \ followed by text
$ seq 3|sed $'2i\\\n1.5'
1
1.52
3
$ seq 3|sed $'2i\\\n1.5\n'
1
1.5
2
3
To replace a line, you can use the c
(change) or s
(substitute) commands with a numeric address:
$ seq 3|sed $'2c\\\n1.5\n'
1
1.5
3
$ seq 3|gsed '2c1.5'
1
1.5
3
$ seq 3|sed '2s/.*/1.5/'
1
1.5
3
Alternatives using awk
:
$ seq 3|awk 'NR==2{print 1.5}1'
1
1.5
2
3
$ seq 3|awk '{print NR==2?1.5:$0}'
1
1.5
3
awk
interprets backslashes in variables passed with -v
but not in variables passed using ENVIRON
:
$ seq 3|awk -v v='a\ba' '{print NR==2?v:$0}'
1
a
3
$ seq 3|v='a\ba' awk '{print NR==2?ENVIRON["v"]:$0}'
1
a\ba
3
Both ENVIRON
and -v
are defined by POSIX.
You simply cannot get PowerShell to ommit those pesky newlines. There is no script or cmdlet that does this.
Of course Write-Host is absolute nonsense because you can't redirect/pipe from it! You simply have to write your own:
using System;
namespace WriteToStdout
{
class Program
{
static void Main(string[] args)
{
if (args != null)
{
Console.Write(string.Join(" ", args));
}
}
}
}
E.g.
PS C:\> writetostdout finally I can write to stdout like echo -n
finally I can write to stdout like echo -nPS C:\>
This worked for me
$(function() {
$("#select option").each(function(i){
alert($(this).text() + " : " + $(this).val());
});
});
list(newdict)
works in both Python 2 and Python 3, providing a simple list of the keys in newdict
. keys()
isn't necessary. (:
A custom HtmlHelper extension is another option. Note: ParameterDictionary is my own type. You could substitute a RouteValueDictionary but you'd have to construct it differently.
public static string ActionLinkSpan( this HtmlHelper helper, string linkText, string actionName, string controllerName, object htmlAttributes )
{
TagBuilder spanBuilder = new TagBuilder( "span" );
spanBuilder.InnerHtml = linkText;
return BuildNestedAnchor( spanBuilder.ToString(), string.Format( "/{0}/{1}", controllerName, actionName ), htmlAttributes );
}
private static string BuildNestedAnchor( string innerHtml, string url, object htmlAttributes )
{
TagBuilder anchorBuilder = new TagBuilder( "a" );
anchorBuilder.Attributes.Add( "href", url );
anchorBuilder.MergeAttributes( new ParameterDictionary( htmlAttributes ) );
anchorBuilder.InnerHtml = innerHtml;
return anchorBuilder.ToString();
}
this
is the DOM element on which the event was hooked. this.id
is its ID. No need to wrap it in a jQuery instance to get it, the id
property reflects the attribute reliably on all browsers.
$("select").change(function() {
alert("Changed: " + this.id);
}
You're not doing this in your code sample, but if you were watching a container with several form elements, that would give you the ID of the container. If you want the ID of the element that triggered the event, you could get that from the event
object's target
property:
$("#container").change(function(event) {
alert("Field " + event.target.id + " changed");
});
(jQuery ensures that the change
event bubbles, even on IE where it doesn't natively.)
If your are migrating ASP.NET 2.0 Website to .NET Web APP 4.5, you can have that issue too. And puting batch=false, adding a namespace etc... can not work.
The workaround is to rename the old App_Code folder (or any problematic folder) to Old_App_Code (like the automatic process do it), or any other name.
Maybe that's a bit shorter and easier to understand:
import re
text = '... someline abc... someother line... name my_user_name is valid.. some more lines'
>>> re.search('name (.*) is valid', text).group(1)
'my_user_name'
If you are using firestore (and not just storing the timestamp as a string) a date field in a document will return a Timestamp. The Timestamp object contains a toDate()
method.
Using timeago you can create a relative time quite simply:
_ago(Timestamp t) {
return timeago.format(t.toDate(), 'en_short');
}
build() {
return Text(_ago(document['mytimestamp'])));
}
Make sure to set _firestore.settings(timestampsInSnapshotsEnabled: true);
to return a Timestamp instead of a Date object.
At the time the compiler encounters the call to swapCase in main(), it does not know about the function swapCase, so it reports an error. You can either move the definition of swapCase above main, or declare swap case above main:
void swapCase(char* name);
Also, the 32 in swapCase causes the reader to pause and wonder. The comment helps! In this context, it would add clarity to write
if ('A' <= name[i] && name[i] <= 'Z')
name[i] += 'a' - 'A';
else if ('a' <= name[i] && name[i] <= 'z')
name[i] += 'A' - 'a';
The construction in my if-tests is a matter of personal style. Yours were just fine. The main thing is the way to modify name[i] -- using the difference in 'a' vs. 'A' makes it more obvious what is going on, and nobody has to wonder if the '32' is actually correct.
Good luck learning!
call concat
and pass param axis=1
to concatenate column-wise:
In [5]:
pd.concat([df_a,df_b], axis=1)
Out[5]:
AAseq Biorep Techrep Treatment mz AAseq1 Biorep1 Techrep1 \
0 ELVISLIVES A 1 C 500.0 ELVISLIVES A 1
1 ELVISLIVES A 1 C 500.5 ELVISLIVES A 1
2 ELVISLIVES A 1 C 501.0 ELVISLIVES A 1
Treatment1 inte1
0 C 1100
1 C 1050
2 C 1010
There is a useful guide to the various methods of merging, joining and concatenating online.
For example, as you have no clashing columns you can merge
and use the indices as they have the same number of rows:
In [6]:
df_a.merge(df_b, left_index=True, right_index=True)
Out[6]:
AAseq Biorep Techrep Treatment mz AAseq1 Biorep1 Techrep1 \
0 ELVISLIVES A 1 C 500.0 ELVISLIVES A 1
1 ELVISLIVES A 1 C 500.5 ELVISLIVES A 1
2 ELVISLIVES A 1 C 501.0 ELVISLIVES A 1
Treatment1 inte1
0 C 1100
1 C 1050
2 C 1010
And for the same reasons as above a simple join
works too:
In [7]:
df_a.join(df_b)
Out[7]:
AAseq Biorep Techrep Treatment mz AAseq1 Biorep1 Techrep1 \
0 ELVISLIVES A 1 C 500.0 ELVISLIVES A 1
1 ELVISLIVES A 1 C 500.5 ELVISLIVES A 1
2 ELVISLIVES A 1 C 501.0 ELVISLIVES A 1
Treatment1 inte1
0 C 1100
1 C 1050
2 C 1010
lapply
is probably a better choice than apply
here, as apply first coerces your data.frame to an array which means all the columns must have the same type. Depending on your context, this could have unintended consequences.
The pattern is:
df[cols] <- lapply(df[cols], FUN)
The 'cols' vector can be variable names or indices. I prefer to use names whenever possible (it's robust to column reordering). So in your case this might be:
wifi[4:9] <- lapply(wifi[4:9], A)
An example of using column names:
wifi <- data.frame(A=1:4, B=runif(4), C=5:8)
wifi[c("B", "C")] <- lapply(wifi[c("B", "C")], function(x) -1 * x)
For those who don't care about IE6/IE7, the same guy who wrote Raphael built an svg engine specifically for modern browsers: Snap.svg .. they have a really nice site with good docs: http://snapsvg.io
snap.svg couldn't be easier to use right out of the box and can manipulate/update existing SVGs or generate new ones. You can read this stuff on the snap.io about page but here's a quick run down:
Cons
Pros
Implements the full features of SVG like masking, clipping, patterns, full gradients, groups, and more.
Ability to work with existing SVGs: content does not have to be generated with Snap for it to work with Snap, allowing you to create the content with any common design tools.
Full animation support using a straightforward, easy-to-implement JavaScript API
Works with strings of SVGs (for example, SVG files loaded via Ajax) without having to actually render them first, similar to a resource container or sprite sheet.
check it out if you're interested: http://snapsvg.io
The answer of Shyam was right. I already faced with this issue before. It's not a problem, it's a SPRING feature. "Transaction rolled back because it has been marked as rollback-only" is acceptable.
Conclusion
Let's me explain more detail:
Question: How many Transaction we have? Answer: Only one
Because you config the PROPAGATION is PROPAGATION_REQUIRED so that the @Transaction persist() is using the same transaction with the caller-processNextRegistrationMessage(). Actually, when we get an exception, the Spring will set rollBackOnly for the TransactionManager so the Spring will rollback just only one Transaction.
Question: But we have a try-catch outside (), why does it happen this exception? Answer Because of unique Transaction
Go to the catch outside
Spring will set the rollBackOnly to true -> it determine we must
rollback the caller (processNextRegistrationMessage) also.
The persist() will rollback itself first.
Question: Why we change PROPAGATION to REQUIRES_NEW, it works?
Answer: Because now the processNextRegistrationMessage() and persist() are in the different transaction so that they only rollback their transaction.
Thanks
you can use push method only if the object is an array:
var data = new Array();
data.push({"country": "IN"}).
OR
data['country'] = "IN"
if it's just an object you can use
data.country = "IN";
try using cfg4py:
DISCLAIMER: I'm the author of this module
After creating the DB link, if the two instances are present in two different databases, then you need to setup a TNS entry on the A machine so that it resolve B. check out here
It should be mentioned that the Accept
header tells the server something about what we are accepting back, whereas the relevant header in this context is Content-Type
It's often advisable to specify Content-Type
as application/json
when sending JSON. For curl the syntax is:
-H 'Content-Type: application/json'
So the complete curl command will be:
curl -H 'Content-Type: application/json' -H 'Accept: application/json' -X PUT -d '{"tags":["tag1","tag2"],"question":"Which band?","answers":[{"id":"a0","answer":"Answer1"},{"id":"a1","answer":"answer2"}]}' http://example.com/service`
LinearLayout layout = (LinearLayout)findViewById(R.id.layout);
View child = getLayoutInflater().inflate(R.layout.child, null);
layout.addView(child);
render() {
return (
<View style={styles.container}>
(() => {
if (this.state == 'news') {
return <Text>data</Text>
}
else
return <Text></Text>
})()
</View>
)
}
You may use:
FileSystems.getDefault().getPath(new String()).toAbsolutePath();
or
FileSystems.getDefault().getPath(new String("./")).toAbsolutePath().getParent()
This will give you the root folder path without using the name of the file. You can then drill down to where you want to go.
Example: /src/main/java...
I spent some time on this very problem - I was trying to verify a file existed before opening it.
Eventually, I came up with a solution using XML and SOAP - use the EnumerateFolder method and pull in an XML response with the folder's contents.
I blogged about it here.
The following worked perfectly for me, running Ubuntu 13.10 64-bit:
sudo apt-get install libmysqlclient-dev
sudo apt-get install python-dev
Now, navigate to your virtualenv (such as env folder) and execute the following:
sudo ./bin/pip install mysql-python
I actually found the solution in a separate question and I am quoting it below:
If you have created the virtualenv with the --no-site-packages switch (the default), then system-wide installed additions such as MySQLdb are not included in the virtual environment packages.
You need to install MySQLdb with the pip command installed with the virtualenv. Either activate the virtualenv with the bin/activate script, or use bin/pip from within the virtualenv to install the MySQLdb library locally as well.
Alternatively, create a new virtualenv with system site-packages included by using the --system-site-package switch.
I think this should also work with OSX. The only problem would be getting an equivalent command for installing libmysqlclient-dev
and python-dev
as they are needed to compile
mysql-python
I guess.
Hope this helps.
The short answer to 2nd part of the question is simply that CString
class doesn't provide a direct typecast conversion by design and what you are doing is kind of cheat.
A longer answer is the following:
The reason you can typcast CString
to LPCTSTR
is because CString provides this facility by overriding operator=
. By design it provides conversion to only LPCTSTR
pointer so the string value can't be modified with this pointer.
In other words, it simply doesn't provide an overload operator=
to convert the CString
into LPSTR
for the same reason as above. They don't want to allow altering the string value this way.
So essentially, the trick is to use the operator CString provide and get this:
LPTSTR lptstr = (LPCTSTR) string; // CString provide this operator overload
Now LPTSTR can be further type casted to LPSTR :)
dispinfo.item.pszText = LPTSTR( lpfzfd); // accomplish the cheat :P
The correct way to get LPTSTR
from 'CString' is this though (complete example):
CString str = _T("Hello");
LPTSTR lpstr = str.GetBuffer(str.GetAllocLength());
str.ReleaseBuffer(); // you must call this function if you change the string above with the pointer
Again because the GetBuffer() returns LPTSTR
for that reason that now you can modify :)
You can't call _doPostBack()
because it forces submition of the form. Why don't you disable the PostBack
on the UpdatePanel
?
private void usuarioBox_TextChanged(object sender, EventArgs e)
{
string textComboBox = usuarioBox.Text;
}
Put them into a list
and use merge
with Reduce
Reduce(function(x, y) merge(x, y, all=TRUE), list(df1, df2, df3))
# id v1 v2 v3
# 1 1 1 NA NA
# 2 10 4 NA NA
# 3 2 3 4 NA
# 4 43 5 NA NA
# 5 73 2 NA NA
# 6 23 NA 2 1
# 7 57 NA 3 NA
# 8 62 NA 5 2
# 9 7 NA 1 NA
# 10 96 NA 6 NA
You can also use this more concise version:
Reduce(function(...) merge(..., all=TRUE), list(df1, df2, df3))
You can use Getfv.co :
To retrieve a favicon you can hotlink it at... http://g.etfv.co/[URL]
Example for this page : http://g.etfv.co/https://stackoverflow.com/questions/5119041/how-can-i-get-a-web-sites-favicon
Download content and let's go !
Edit :
Getfv.co and fvicon.com look dead. If you want I found a non free alternative : grabicon.com.
You should remove web
middleware from routes.php
. Adding web
middleware manually causes session and request related problems in Laravel 5.2.27 and higher.
If it didn't help (still, keep routes.php
without web middleware), you can try little bit different approach:
return redirect()->back()->with('message', 'IT WORKS!');
Displaying message if it exists:
@if(session()->has('message'))
<div class="alert alert-success">
{{ session()->get('message') }}
</div>
@endif
I can spot a few different problems with this. However, in the interest of time, try this chunk of code instead:
<?php require 'db.php'; ?> <?php if (isset($_POST['search'])) { $limit = $_POST['limit']; $country = $_POST['country']; $state = $_POST['state']; $city = $_POST['city']; $data = mysqli_query( $link, "SELECT * FROM proxies WHERE country = '{$country}' AND state = '{$state}' AND city = '{$city}' LIMIT {$limit}" ); while ($assoc = mysqli_fetch_assoc($data)) { $proxy = $assoc['proxy']; ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Sock5Proxies</title> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <link href="./style.css" rel="stylesheet" type="text/css" /> <link href="./buttons.css" rel="stylesheet" type="text/css" /> </head> <body> <center> <h1>Sock5Proxies</h1> </center> <div id="wrapper"> <div id="header"> <ul id="nav"> <li class="active"><a href="index.html"><span></span>Home</a></li> <li><a href="leads.html"><span></span>Leads</a></li> <li><a href="payout.php"><span></span>Pay out</a></li> <li><a href="contact.html"><span></span>Contact</a></li> <li><a href="logout.php"><span></span>Logout</a></li> </ul> </div> <div id="content"> <div id="center"> <table cellpadding="0" cellspacing="0" style="width:690px"> <thead> <tr> <th width="75" class="first">Proxy</th> <th width="50" class="last">Status</th> </tr> </thead> <tbody> <tr class="rowB"> <td class="first"> <?php echo $proxy ?> </td> <td class="last">Check</td> </tr> </tbody> </table> </div> </div> <div id="footer"></div> <span id="about">Version 1.0</span> </div> </body> </html> <?php } } ?> <html> <form action="" method="POST"> <input type="text" name="limit" placeholder="10" /><br> <input type="text" name="country" placeholder="Country" /><br> <input type="text" name="state" placeholder="State" /><br> <input type="text" name="city" placeholder="City" /><br> <input type="submit" name="search" value="Search" /><br> </form> </html>
SELECT <...>
FROM A.tableA JOIN B.tableB
SELECT t1.a, t2.b
FROM t1
JOIN t2 ON t1.a LIKE '%'+t2.b +'%'
because the last answer not work
copssh - OpenSSH for Windows
http://www.itefix.no/i2/copssh
Packages essential Cygwin binaries.
If you are not very offended by the GOTO
keyword, it can be used to simulate a DO
/ WHILE
in T-SQL. Consider the following rather nonsensical example written in pseudocode:
SET I=1
DO
PRINT I
SET I=I+1
WHILE I<=10
Here is the equivalent T-SQL code using goto:
DECLARE @I INT=1;
START: -- DO
PRINT @I;
SET @I+=1;
IF @I<=10 GOTO START; -- WHILE @I<=10
Notice the one to one mapping between the GOTO
enabled solution and the original DO
/ WHILE
pseudocode. A similar implementation using a WHILE
loop would look like:
DECLARE @I INT=1;
WHILE (1=1) -- DO
BEGIN
PRINT @I;
SET @I+=1;
IF NOT (@I<=10) BREAK; -- WHILE @I<=10
END
Now, you could of course rewrite this particular example as a simple WHILE
loop, since this is not such a good candidate for a DO
/ WHILE
construct. The emphasis was on example brevity rather than applicability, since legitimate cases requiring a DO
/ WHILE
are rare.
REPEAT / UNTIL, anyone (does NOT work in T-SQL)?
SET I=1
REPEAT
PRINT I
SET I=I+1
UNTIL I>10
... and the GOTO
based solution in T-SQL:
DECLARE @I INT=1;
START: -- REPEAT
PRINT @I;
SET @I+=1;
IF NOT(@I>10) GOTO START; -- UNTIL @I>10
Through creative use of GOTO
and logic inversion via the NOT
keyword, there is a very close relationship between the original pseudocode and the GOTO
based solution. A similar solution using a WHILE
loop looks like:
DECLARE @I INT=1;
WHILE (1=1) -- REPEAT
BEGIN
PRINT @I;
SET @I+=1;
IF @I>10 BREAK; -- UNTIL @I>10
END
An argument can be made that for the case of the REPEAT
/ UNTIL
, the WHILE
based solution is simpler, because the if condition is not inverted. On the other hand it is also more verbose.
If it wasn't for all of the disdain around the use of GOTO
, these might even be idiomatic solutions for those few times when these particular (evil) looping constructs are necessary in T-SQL code for the sake of clarity.
Use these at your own discretion, trying not to suffer the wrath of your fellow developers when they catch you using the much maligned GOTO
.
A unique constraint can't be over 8000 bytes per row and will only use the first 900 bytes even then so the safest maximum size for your keys would be:
create table [misc_info]
(
[id] INTEGER PRIMARY KEY IDENTITY NOT NULL,
[key] nvarchar(450) UNIQUE NOT NULL,
[value] nvarchar(max) NOT NULL
)
i.e. the key can't be over 450 characters. If you can switch to varchar
instead of nvarchar
(e.g. if you don't need to store characters from more than one codepage) then that could increase to 900 characters.
Only thing that worked for me is this function:
Sub DoTrim()
Dim cell As Range
Dim str As String
For Each cell In Selection.Cells
If cell.HasFormula = False Then
str = Left(cell.Value, 1) 'space
While str = " " Or str = Chr(160)
cell.Value = Right(cell.Value, Len(cell.Value) - 1)
str = Left(cell.Value, 1) 'space
Wend
str = Right(cell.Value, 1) 'space
While str = " " Or str = Chr(160)
cell.Value = Left(cell.Value, Len(cell.Value) - 1)
str = Right(cell.Value, 1) 'space
Wend
End If
Next cell
End Sub
You can append to a csv by opening the file in append mode:
with open('my_csv.csv', 'a') as f:
df.to_csv(f, header=False)
If this was your csv, foo.csv
:
,A,B,C
0,1,2,3
1,4,5,6
If you read that and then append, for example, df + 6
:
In [1]: df = pd.read_csv('foo.csv', index_col=0)
In [2]: df
Out[2]:
A B C
0 1 2 3
1 4 5 6
In [3]: df + 6
Out[3]:
A B C
0 7 8 9
1 10 11 12
In [4]: with open('foo.csv', 'a') as f:
(df + 6).to_csv(f, header=False)
foo.csv
becomes:
,A,B,C
0,1,2,3
1,4,5,6
0,7,8,9
1,10,11,12
For anybody getting this on Xamarin.Android (MonoDroid) even when StartActivity is called from activity - this is actually Xamarin bug with new ART runtime, see https://bugzilla.xamarin.com/show_bug.cgi?id=17630
document.querySelectorAll
works pretty well and allows you to further narrow down your selection.
https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelectorAll
Hi thanx a lot it solved my issue ,
By default vs 2008 will add
<!--<add verb="*" path="*.asmx" validate="false" type="Microsoft.Web.Script.Services.ScriptHandlerFactory, Microsoft.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<add verb="GET" path="ScriptResource.axd" type="Microsoft.Web.Handlers.ScriptResourceHandler" validate="false" />-->
Need to correct Default config(Above) to below code FIX
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<add verb="GET" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler" validate="false"/>
Try this
button.addTarget(self, action:#selector(handleRegister()), for: .touchUpInside).
Just add parenthesis with name of method.
Also you can refer link : Value of type 'CustomButton' has no member 'touchDown'
I had the same problem, though my project did not use the support library. Adding libs/android-support-v4.jar to the project worked around the problem without needing to revert the build tools back from v19.
The keyword simply pops a frame from the call stack returning the control to the line following the function call.
The screen widths Bootstrap v3.x uses are as follows:
Extra small devices
Phones (<768px)
/ .col-xs-
Small devices
Tablets (=768px)
/ .col-sm-
Medium devices
Desktops (=992px)
/ .col-md-
Large devices
Desktops (=1200px)
/ .col-lg-
So, these are good to use and work well in practice.
Continuing from this answer: https://stackoverflow.com/a/15285514/1865860, I forked the nice github repo from @daniel-smith and made some improvements:
setItems
methoditems_list
setItems
methodslistItem
touch feedbackJokab's answer helped me a lot but in my case I could not push to github until I logged in my github account to my git bash so i ran the following commands
git config credential.helper store
then
git push http://github.com/[user name]/[repo name].git
After the second command a GUI window appeared, I provided my login credentials and it worked for me.
Here's what u can also try....
run your application....while it is still running launch your command prompt
while your application is running type netstat -n on the command prompt. You should see a list of TCP/IP connections. Check if your list is not very long. Ideally you should have less than 5 connections in the list. Check the status of the connections.
If you have too many connections with a TIME_WAIT status it means the connection has been closed and is waiting for the OS to release the resources. If you are running on Windows, the default ephemeral port rang is between 1024 and 5000 and the default time it takes Windows to release the resource from TIME_WAIT status is 4 minutes. So if your application used more then 3976 connections in less then 4 minutes, you will get the exception you got.
Suggestions to fix it:
If you continue to receive the same error message (which is highly unlikely) you can then try the following: (Please don't do it if you are not familiar with the Windows registry)
Modify the settings so they read:
MaxUserPort = dword:00004e20 (10,000 decimal) TcpTimedWaitDelay = dword:0000001e (30 decimal)
This will increase the number of ports to 10,000 and reduce the time to release freed tcp/ip connections.
Only use suggestion 2 if 1 fails.
Thank you.
There's our IDE / engine called Codea.
The runtime is iOS only, but it's open source. The development environment is iPad only at the moment.
The second one causes a new char array to be created, and all chars from the String to be copied to this new char array, so I would guess that the first one is faster (and less memory-hungry).
Use ThisWorkbook
which will refer to the original workbook which holds the code.
Alternatively at code start
Dim Wb As Workbook
Set Wb = ActiveWorkbook
sample code that activates all open books before returning to ThisWorkbook
Sub Test()
Dim Wb As Workbook
Dim Wb2 As Workbook
Set Wb = ThisWorkbook
For Each Wb2 In Application.Workbooks
Wb2.Activate
Next
Wb.Activate
End Sub
The port is available here: java.rmi.registry.Registry.REGISTRY_PORT
(1099)
Actually this is not really the same to import a variable with:
from file1 import x1
print(x1)
and
import file1
print(file1.x1)
Altough at import time x1 and file1.x1 have the same value, they are not the same variables. For instance, call a function in file1 that modifies x1 and then try to print the variable from the main file: you will not see the modified value.
Subscribing to the IUS Community Project Repository
cd ~
curl 'https://setup.ius.io/' -o setup-ius.sh
Run the script:
sudo bash setup-ius.sh
Upgrading mod_php with Apache
This section describes the upgrade process for a system using Apache as the web server and mod_php to execute PHP code. If, instead, you are running Nginx and PHP-FPM, skip ahead to the next section.
Begin by removing existing PHP packages. Press y and hit Enter to continue when prompted.
sudo yum remove php-cli mod_php php-common
Install the new PHP 7 packages from IUS. Again, press y and Enter when prompted.
sudo yum install mod_php70u php70u-cli php70u-mysqlnd
Finally, restart Apache to load the new version of mod_php:
sudo apachectl restart
You can check on the status of Apache, which is managed by the httpd systemd unit, using systemctl:
systemctl status httpd
This really is beyond the capabilities of shell script. Shell script and the standard Unix tools are okay at parsing line oriented files, but things change when you talk about XML. Even simple tags can present a problem:
<MYTAG>Data</MYTAG>
<MYTAG>
Data
</MYTAG>
<MYTAG param="value">Data</MYTAG>
<MYTAG><ANOTHER_TAG>Data
</ANOTHER_TAG><MYTAG>
Imagine trying to write a shell script that can read the data enclosed in . The three very, very simply XML examples all show different ways this can be an issue. The first two examples are the exact same syntax in XML. The third simply has an attribute attached to it. The fourth contains the data in another tag. Simple sed
, awk
, and grep
commands cannot catch all possibilities.
You need to use a full blown scripting language like Perl, Python, or Ruby. Each of these have modules that can parse XML data and make the underlying structure easier to access. I've use XML::Simple in Perl. It took me a few tries to understand it, but it did what I needed, and made my programming much easier.
This method can be more optimized than above
def rindex(iterable, value):
try:
return len(iterable) - next(i for i, val in enumerate(reversed(iterable)) if val == value) - 1
except StopIteration:
raise ValueError
export enum UserLevel {
Staff = 0,
Leader,
Manager,
}
export enum Gender {
None = "none",
Male = "male",
Female = "female",
}
Difference result in log:
log(Object.keys(Gender))
=>
[ 'None', 'Male', 'Female' ]
log(Object.keys(UserLevel))
=>
[ '0', '1', '2', 'Staff', 'Leader', 'Manager' ]
The solution, we need to remove key as a number.
export class Util {
static existValueInEnum(type: any, value: any): boolean {
return Object.keys(type).filter(k => isNaN(Number(k))).filter(k => type[k] === value).length > 0;
}
}
Usage
// For string value
if (!Util.existValueInEnum(Gender, "XYZ")) {
//todo
}
//For number value, remember cast to Number using Number(val)
if (!Util.existValueInEnum(UserLevel, 0)) {
//todo
}
If you want to support more browsers than the CSS3 fancy, you can look at the open source library cufon javascript library
And here is the API, if you want to do more funky stuff.
Major Pro: Allows you to do what you want / need.
Major Con: Disallows text selection in some browsers, so use is appropiate on header texts (but you can use it in all your site if you want)
function convert(str) {
var date = new Date(str),
mnth = ("0" + (date.getMonth()+1)).slice(-2),
day = ("0" + date.getDate()).slice(-2);
hours = ("0" + date.getHours()).slice(-2);
minutes = ("0" + date.getMinutes()).slice(-2);
return [ date.getFullYear(), mnth, day, hours, minutes ].join("-");
}
I used this efficiently in angular because i was losing two hours on updating a $scope.STARTevent, and $scope.ENDevent, IN console.log was fine, however saving to mYsql dropped two hours.
var whatSTART = $scope.STARTevent;
whatSTART = convert(whatever);
THIS WILL ALSO work for END
---One to Many--- A Parent can have two or more children.
---Many to one--- Those 3 children can have a single Parent
Both are similar. This can be used according to the need. If you want to find children for a particular parent, then you can go with One-To-Many. Or else, want to find parents for twins, you may go with Many-To-One.
If you have deleted multiple files locally but not committed, you can force checkout
$ git checkout -f HEAD
In my case I had an image in different folders (with same name) for supporting different dpi and device sizes. All images had same name except one of them. It was mistyped and once I renamed it like other names, it resolved my issue.
TL:DR
row lock = A$5
column lock = $A5
Both = $A$5
Below are examples of how to use the Excel lock reference $
when creating your formulas
To prevent increments when moving from one row to another put the $ after the column letter and before the row number. e.g. A$5
To prevent increments when moving from one column to another put the $ before the row number. e.g. $A5
To prevent increments when moving from one column to another or from one row to another put the $ before the row number and before the column letter. e.g. $A$5
Using the lock reference will also prevent increments when dragging cells over to duplicate calculations.
There is another way to disable JPA tools for the project, that doesn't require to uninstall JPA features/plug-ins. I tested on https://github.com/Jasig/uPortal project wich was mentioned in https://bugs.eclipse.org/bugs/show_bug.cgi?id=386171 and claims to have similar problems:
After disabling JPA facet for uportal-war project form repository above I don't see any JPA related jobs in Eclipse Progress View.
System.out.println(Integer.toHexString(test[0]));
OR (pretty print)
System.out.printf("0x%02X", test[0]);
OR (pretty print)
System.out.println(String.format("0x%02X", test[0]));
In June 2016 Instagram made most of the functionality of their API available only to applications that have passed a review process. They still however provide JSON data through the web interface, and you can add the parameter __a=1
to a URL to only include the JSON data.
max=
while :;do
c=$(curl -s "https://www.instagram.com/username/?__a=1&max_id=$max")
jq -r '.user.media.nodes[]?|.display_src'<<<"$c"
max=$(jq -r .user.media.page_info.end_cursor<<<"$c")
jq -e .user.media.page_info.has_next_page<<<"$c">/dev/null||break
done
Edit: As mentioned in the comment by alnorth29, the max_id
parameter is now ignored. Instagram also changed the format of the response, and you need to perform additional requests to get the full-size URLs of images in the new-style posts with multiple images per post. You can now do something like this to list the full-size URLs of images on the first page of results:
c=$(curl -s "https://www.instagram.com/username/?__a=1")
jq -r '.graphql.user.edge_owner_to_timeline_media.edges[]?|.node|select(.__typename!="GraphSidecar").display_url'<<<"$c"
jq -r '.graphql.user.edge_owner_to_timeline_media.edges[]?|.node|select(.__typename=="GraphSidecar")|.shortcode'<<<"$c"|while read l;do
curl -s "https://www.instagram.com/p/$l?__a=1"|jq -r '.graphql.shortcode_media|.edge_sidecar_to_children.edges[]?.node|.display_url'
done
To make a list of the shortcodes of each post made by the user whose profile is opened in the frontmost tab in Safari, I use a script like this:
sjs(){ osascript -e'{on run{a}','tell app"safari"to do javascript a in document 1',end} -- "$1";}
while :;do
sjs 'o="";a=document.querySelectorAll(".v1Nh3 a");for(i=0;e=a[i];i++){o+=e.href+"\n"};o'>>/tmp/a
sjs 'window.scrollBy(0,window.innerHeight)'
sleep 1
done
height:100% works if the parent container has a specified height property else, it won't work
Since you are in a controller, the action method is given a Request
parameter.
You can access all POST data with $request->request->all();
.
This returns a key-value pair array.
When using GET requests you access data using $request->query->all();
Answering old thread here (and a bit off-topic) because it's what I found when I was searching how to install Image Magick on Mac OS to run on the local webserver. It's not enough to brew install Imagemagick. You have to also PECL install it so the PHP module is loaded.
From this SO answer:
brew install php
brew install imagemagick
brew install pkg-config
pecl install imagick
And you may need to sudo apachectl restart
. Then check your phpinfo()
within a simple php script running on your web server.
If it's still not there, you probably have an issue with running multiple versions of PHP on the same Mac (one through the command line, one through your web server). It's beyond the scope of this answer to resolve that issue, but there are some good options out there.
Assuming that you don't have a library or system header that defines NULL
as for example (void*)0
or (char*)0
it's fine. I always tend to use 0 myself as it is by definition the null pointer. In c++0x you'll have nullptr
available so the question won't matter as much anymore.
Use htaccess to avoid high-jacking frameset, iframe and any content like images.
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^http://www\.yoursite\.com/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule ^(.*)$ /copyrights.html [L]
This will show a copyright page instead of the expected.
I had a similar issue but from reading this question I figured I could run on UI thread:
YourActivity.this.runOnUiThread(new Runnable() {
public void run() {
alertDialog.show();
}
});
Seems to do the trick for me.
I think you've misunderstood some python syntax, the following does two assignments:
In [11]: a = b = 1
In [12]: a
Out[12]: 1
In [13]: b
Out[13]: 1
So in your code it was as if you were doing:
sum = df['budget'] + df['actual'] # a Series
# and
df['variance'] = df['budget'] + df['actual'] # assigned to a column
The latter creates a new column for df:
In [21]: df
Out[21]:
cluster date budget actual
0 a 2014-01-01 00:00:00 11000 10000
1 a 2014-02-01 00:00:00 1200 1000
2 a 2014-03-01 00:00:00 200 100
3 b 2014-04-01 00:00:00 200 300
4 b 2014-05-01 00:00:00 400 450
5 c 2014-06-01 00:00:00 700 1000
6 c 2014-07-01 00:00:00 1200 1000
7 c 2014-08-01 00:00:00 200 100
8 c 2014-09-01 00:00:00 200 300
In [22]: df['variance'] = df['budget'] + df['actual']
In [23]: df
Out[23]:
cluster date budget actual variance
0 a 2014-01-01 00:00:00 11000 10000 21000
1 a 2014-02-01 00:00:00 1200 1000 2200
2 a 2014-03-01 00:00:00 200 100 300
3 b 2014-04-01 00:00:00 200 300 500
4 b 2014-05-01 00:00:00 400 450 850
5 c 2014-06-01 00:00:00 700 1000 1700
6 c 2014-07-01 00:00:00 1200 1000 2200
7 c 2014-08-01 00:00:00 200 100 300
8 c 2014-09-01 00:00:00 200 300 500
As an aside, you shouldn't use sum
as a variable name as the overrides the built-in sum function.
1.First create a Directory folder and name it raw inside the res folder 2.create a .txt file inside the raw directory folder you created earlier and give it any name eg.articles.txt.... 3.copy and paste the text you want inside the .txt file you created"articles.txt" 4.dont forget to include a textview in your main.xml MainActivity.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gettingtoknowthe_os);
TextView helloTxt = (TextView)findViewById(R.id.gettingtoknowos);
helloTxt.setText(readTxt());
ActionBar actionBar = getSupportActionBar();
actionBar.hide();//to exclude the ActionBar
}
private String readTxt() {
//getting the .txt file
InputStream inputStream = getResources().openRawResource(R.raw.articles);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
try {
int i = inputStream.read();
while (i != -1) {
byteArrayOutputStream.write(i);
i = inputStream.read();
}
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
return byteArrayOutputStream.toString();
}
Hope it worked!
The following is quoted from Taming Lists:
There may be times when you have a list, but you don’t want any bullets, or you want to use some other character in place of the bullet. Again, CSS provides a straightforward solution. Simply add list-style: none; to your rule and force the LIs to display with hanging indents. The rule will look something like this:
ul { list-style: none; margin-left: 0; padding-left: 1em; text-indent: -1em; }
Either the padding or the margin needs to be set to zero, with the other one set to 1em. Depending on the “bullet” that you choose, you may need to modify this value. The negative text-indent causes the first line to be moved to the left by that amount, creating a hanging indent.
The HTML will contain our standard UL, but with whatever character or HTML entity that you want to use in place of the bullet preceding the content of the list item. In our case we'll be using », the right double angle quote: ».
» Item 1
» Item 2
» Item 3
» Item 4
» Item 5 we'll make
a bit longer so that
it will wrap
git log --all -- path/to/file
should work
A function is not even needed. Just put parentheses around the default expression:
create temporary table test(
id int,
ts timestamp without time zone default (now() at time zone 'utc')
);
I stumbled on this post looking to use scientific notation in my code, I used
4.95*Math.Pow(10,-10);
But afterwards I found out you can do
4.95E-10;
Just thought I would add this for anyone in a similar situation that I was in.
Here are two methods which the original author states was recommended by an IB engineer.
See the actual post for more details. I prefer method #2 as it seems simpler.
Method #1:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"BDCustomCell"];
if (cell == nil) {
// Create a temporary UIViewController to instantiate the custom cell.
UIViewController *temporaryController = [[UIViewController alloc] initWithNibName:@"BDCustomCell" bundle:nil];
// Grab a pointer to the custom cell.
cell = (BDCustomCell *)temporaryController.view;
[[cell retain] autorelease];
// Release the temporary UIViewController.
[temporaryController release];
}
return cell;
}
Method #2:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"BDCustomCell"];
if (cell == nil) {
// Load the top-level objects from the custom cell XIB.
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"BDCustomCell" owner:self options:nil];
// Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
cell = [topLevelObjects objectAtIndex:0];
}
return cell;
}
Update (2014): Method #2 is still valid but there is no documentation for it anymore. It used to be in the official docs but is now removed in favor of storyboards.
I posted a working example on Github:
https://github.com/bentford/NibTableCellExample
edit for Swift 4.2
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.tblContacts.register(UINib(nibName: CellNames.ContactsCell, bundle: nil), forCellReuseIdentifier: MyIdentifier)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: MyIdentifier, for: indexPath) as! ContactsCell
return cell
}
I'd like to add to @MBK's answer. Although I found @MBK's answer to be very helpful in solving a similar problem, it'd be better if @MBK included a screenshot of how to filter a particular column.
You may resort to tool special features. Like for DBeaver own proprietary syntax:
@set name = 'me'
SELECT :name;
SELECT ${name};
DELETE FROM book b
WHERE b.author_id IN (SELECT a.id FROM author AS a WHERE a.name = :name);
You may not want to add methods to the Array prototype, which may conflict with other libraries.
I've seen a lot of examples use forEach which, I wouldn't recommend for large arrays due to its poor performance vs a for loop. https://coderwall.com/p/kvzbpa/don-t-use-array-foreach-use-for-instead
Also Math.max(Math, [1,2,3]);
Always gives me NaN?
function minArray(a) {
var min=a[0]; for(var i=0,j=a.length;i<j;i++){min=a[i]<min?a[i]:min;}
return min;
}
function maxArray(a) {
var max=a[0]; for(var i=0,j=a.length;i<j;i++){max=a[i]>max?a[i]:max;}
return max;
}
minArray([1,2,3]); // returns 1
If you have an array of objects the minArray() function example below will accept 2 parameters, the first is the array and the second is the key name for the object key value to compare. The function in this case would return the index of the array that has the smallest given key value.
function minArray(a, key) {
var min, i, j, index=0;
if(!key) {
min=a[0];
for(i=0,j=a.length;i<j;i++){min=a[i]<min?a[i]:min;}
return min;
}
min=a[0][key];
for(i=0,j=a.length;i<j;i++){
if(a[i][key]<min) {
min = a[i][key];
index = i;
}
}
return index;
}
var a = [{fee: 9}, {fee: 2}, {fee: 5}];
minArray(a, "fee"); // returns 1, as 1 is the proper array index for the 2nd array element.
You can run conda install --file requirements.txt
instead of the loop, but there is no target directory in conda install. conda install
installs a list of packages into a specified conda environment.
You go around making your webpage, and keep on putting {{data bindings}} whenever you feel you would have dynamic data. Angular will then provide you a $scope handler, which you can populate (statically or through calls to the web server).
This is a good understanding of data-binding. I think you've got that down.
For simple DOM manipulation, which doesnot involve data manipulation (eg: color changes on mousehover, hiding/showing elements on click), jQuery or old-school js is sufficient and cleaner. This assumes that the model in angular's mvc is anything that reflects data on the page, and hence, css properties like color, display/hide, etc changes dont affect the model.
I can see your point here about "simple" DOM manipulation being cleaner, but only rarely and it would have to be really "simple". I think DOM manipulation is one the areas, just like data-binding, where Angular really shines. Understanding this will also help you see how Angular considers its views.
I'll start by comparing the Angular way with a vanilla js approach to DOM manipulation. Traditionally, we think of HTML as not "doing" anything and write it as such. So, inline js, like "onclick", etc are bad practice because they put the "doing" in the context of HTML, which doesn't "do". Angular flips that concept on its head. As you're writing your view, you think of HTML as being able to "do" lots of things. This capability is abstracted away in angular directives, but if they already exist or you have written them, you don't have to consider "how" it is done, you just use the power made available to you in this "augmented" HTML that angular allows you to use. This also means that ALL of your view logic is truly contained in the view, not in your javascript files. Again, the reasoning is that the directives written in your javascript files could be considered to be increasing the capability of HTML, so you let the DOM worry about manipulating itself (so to speak). I'll demonstrate with a simple example.
<div rotate-on-click="45"></div>
First, I'd just like to comment that if we've given our HTML this functionality via a custom Angular Directive, we're already done. That's a breath of fresh air. More on that in a moment.
function rotate(deg, elem) {
$(elem).css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
}
function addRotateOnClick($elems) {
$elems.each(function(i, elem) {
var deg = 0;
$(elem).click(function() {
deg+= parseInt($(this).attr('rotate-on-click'), 10);
rotate(deg, this);
});
});
}
addRotateOnClick($('[rotate-on-click]'));
app.directive('rotateOnClick', function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
var deg = 0;
element.bind('click', function() {
deg+= parseInt(attrs.rotateOnClick, 10);
element.css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
});
}
};
});
Pretty light, VERY clean and that's just a simple manipulation! In my opinion, the angular approach wins in all regards, especially how the functionality is abstracted away and the dom manipulation is declared in the DOM. The functionality is hooked onto the element via an html attribute, so there is no need to query the DOM via a selector, and we've got two nice closures - one closure for the directive factory where variables are shared across all usages of the directive, and one closure for each usage of the directive in the link
function (or compile
function).
Two-way data binding and directives for DOM manipulation are only the start of what makes Angular awesome. Angular promotes all code being modular, reusable, and easily testable and also includes a single-page app routing system. It is important to note that jQuery is a library of commonly needed convenience/cross-browser methods, but Angular is a full featured framework for creating single page apps. The angular script actually includes its own "lite" version of jQuery so that some of the most essential methods are available. Therefore, you could argue that using Angular IS using jQuery (lightly), but Angular provides much more "magic" to help you in the process of creating apps.
This is a great post for more related information: How do I “think in AngularJS” if I have a jQuery background?
The above points are aimed at the OP's specific concerns. I'll also give an overview of the other important differences. I suggest doing additional reading about each topic as well.
Angular is a framework, jQuery is a library. Frameworks have their place and libraries have their place. However, there is no question that a good framework has more power in writing an application than a library. That's exactly the point of a framework. You're welcome to write your code in plain JS, or you can add in a library of common functions, or you can add a framework to drastically reduce the code you need to accomplish most things. Therefore, a more appropriate question is:
Good frameworks can help architect your code so that it is modular (therefore reusable), DRY, readable, performant and secure. jQuery is not a framework, so it doesn't help in these regards. We've all seen the typical walls of jQuery spaghetti code. This isn't jQuery's fault - it's the fault of developers that don't know how to architect code. However, if the devs did know how to architect code, they would end up writing some kind of minimal "framework" to provide the foundation (achitecture, etc) I discussed a moment ago, or they would add something in. For example, you might add RequireJS to act as part of your framework for writing good code.
Here are some things that modern frameworks are providing:
Before I further discuss Angular, I'd like to point out that Angular isn't the only one of its kind. Durandal, for example, is a framework built on top of jQuery, Knockout, and RequireJS. Again, jQuery cannot, by itself, provide what Knockout, RequireJS, and the whole framework built on top them can. It's just not comparable.
If you need to destroy a planet and you have a Death Star, use the Death star.
Building on my previous points about what frameworks provide, I'd like to commend the way that Angular provides them and try to clarify why this is matter of factually superior to jQuery alone.
In my above example, it is just absolutely unavoidable that jQuery has to hook onto the DOM in order to provide functionality. That means that the view (html) is concerned about functionality (because it is labeled with some kind of identifier - like "image slider") and JavaScript is concerned about providing that functionality. Angular eliminates that concept via abstraction. Properly written code with Angular means that the view is able to declare its own behavior. If I want to display a clock:
<clock></clock>
Done.
Yes, we need to go to JavaScript to make that mean something, but we're doing this in the opposite way of the jQuery approach. Our Angular directive (which is in it's own little world) has "augumented" the html and the html hooks the functionality into itself.
Angular gives you a straightforward way to structure your code. View things belong in the view (html), augmented view functionality belongs in directives, other logic (like ajax calls) and functions belong in services, and the connection of services and logic to the view belongs in controllers. There are some other angular components as well that help deal with configuration and modification of services, etc. Any functionality you create is automatically available anywhere you need it via the Injector subsystem which takes care of Dependency Injection throughout the application. When writing an application (module), I break it up into other reusable modules, each with their own reusable components, and then include them in the bigger project. Once you solve a problem with Angular, you've automatically solved it in a way that is useful and structured for reuse in the future and easily included in the next project. A HUGE bonus to all of this is that your code will be much easier to test.
THANK GOODNESS. The aforementioned jQuery spaghetti code resulted from a dev that made something "work" and then moved on. You can write bad Angular code, but it's much more difficult to do so, because Angular will fight you about it. This means that you have to take advantage (at least somewhat) to the clean architecture it provides. In other words, it's harder to write bad code with Angular, but more convenient to write clean code.
Angular is far from perfect. The web development world is always growing and changing and there are new and better ways being put forth to solve problems. Facebook's React and Flux, for example, have some great advantages over Angular, but come with their own drawbacks. Nothing's perfect, but Angular has been and is still awesome for now. Just as jQuery once helped the web world move forward, so has Angular, and so will many to come.
There are no implicit conversions from the values of a scoped enumerator [AKA: "strong enum"] to integral types, although
static_cast
may be used to obtain the numeric value of the enumerator.
(emphasis added)
Source: https://en.cppreference.com/w/cpp/language/enum --> under the section "Scoped enumerations".
In C++ there are two types of enums:
"Scoped" enums, or "strong" enums, give two additional "features" beyond what "regular" enums give you. Scoped enums:
Example of an enum class:
// enum class (AKA: "strong" or "scoped" enum)
enum class my_enum
{
A = 0,
B,
C,
};
my_enum e = my_enum::A; // scoped through `my_enum::`
e = my_enum::B;
// NOT ALLOWED!:
// error: cannot convert ‘my_enum’ to ‘int’ in initialization
// int i = e;
// But this works fine:
int i = static_cast<int>(e);
The first "feature" may actually be something you don't want, in which case you just need to use a regular C-style enum instead! And the nice thing is: you can still "scope" or "namespace" the enum, as has been done in C for decades, by simply prepending its name with the enum type name, like this:
Example of a regular enum:
// regular enum (AKA: "weak" or "C-style" enum)
enum my_enum
{
MY_ENUM_A = 0,
MY_ENUM_B,
MY_ENUM_C,
};
my_enum e = MY_ENUM_A; // scoped through `MY_ENUM_`
e = MY_ENUM_B;
// This works fine!
int i = e;
Notice you still get the benefit of "scoping" simply by adding the MY_ENUM_
"scope" to the front of each enum!
Test the above code here: https://onlinegdb.com/SJQ7uthcP.
You can also run your app like any other console applications but only after the publish.
Let's suppose you have the simple console app named MyTestConsoleApp. Open the package manager console and run the following command:
dotnet publish -c Debug -r win10-x64
-c flag mean that you want to use the debug configuration (in other case you should use Release value) - r flag mean that your application will be runned on Windows platform with x64 architecture.
When the publish procedure will be finished your will see the *.exe file located in your bin/Debug/publish directory.
Now you can call it via command line tools. So open the CMD window (or terminal) move to the directory where your *.exe file is located and write the next command:
>> MyTestConsoleApp.exe argument-list
For example:
>> MyTestConsoleApp.exe --input some_text -r true
Try running this code in your script.
document.getElementById("dummy").remove();
And it will hopefully remove the element/button.
Comparing the performance of all the answers mentioned here on Python 3.9.1 and Python 2.7.16.
Answers are mentioned in order of performance:
Arkku's set
difference using subtraction "-" operation - (91.3 nsec per loop)
mquadri$ python3 -m timeit -s "l1 = set([1,2,6,8]); l2 = set([2,3,5,8]);" "l1 - l2"
5000000 loops, best of 5: 91.3 nsec per loop
Moinuddin Quadri's using set().difference()
- (133 nsec per loop)
mquadri$ python3 -m timeit -s "l1 = set([1,2,6,8]); l2 = set([2,3,5,8]);" "l1.difference(l2)"
2000000 loops, best of 5: 133 nsec per loop
Moinuddin Quadri's list comprehension with set
based lookup- (366 nsec per loop)
mquadri$ python3 -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "[x for x in l1 if x not in l2]"
1000000 loops, best of 5: 366 nsec per loop
Donut's list comprehension on plain list - (489 nsec per loop)
mquadri$ python3 -m timeit -s "l1 = [1,2,6,8]; l2 = [2,3,5,8];" "[x for x in l1 if x not in l2]"
500000 loops, best of 5: 489 nsec per loop
Daniel Pryden's generator expression with set
based lookup and type-casting to list
- (583 nsec per loop) : Explicitly type-casting to list to get the final object as list
, as requested by OP. If generator expression is replaced with list comprehension, it'll become same as Moinuddin Quadri's list comprehension with set
based lookup.
mquadri$ mquadri$ python3 -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "list(x for x in l1 if x not in l2)"
500000 loops, best of 5: 583 nsec per loop
Moinuddin Quadri's using filter()
and explicitly type-casting to list
(need to explicitly type-cast as in Python 3.x, it returns iterator) - (681 nsec per loop)
mquadri$ python3 -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "list(filter(lambda x: x not in l2, l1))"
500000 loops, best of 5: 681 nsec per loop
Akshay Hazari's using combination of functools.reduce
+ filter
-(3.36 usec per loop) : Explicitly type-casting to list
as from Python 3.x it started returned returning iterator. Also we need to import functools
to use reduce
in Python 3.x
mquadri$ python3 -m timeit "from functools import reduce; l1 = [1,2,6,8]; l2 = [2,3,5,8];" "list(reduce(lambda x,y : filter(lambda z: z!=y,x) ,l1,l2))"
100000 loops, best of 5: 3.36 usec per loop
Answers are mentioned in order of performance:
Arkku's set
difference using subtraction "-" operation - (0.0783 usec per loop)
mquadri$ python -m timeit -s "l1 = set([1,2,6,8]); l2 = set([2,3,5,8]);" "l1 - l2"
10000000 loops, best of 3: 0.0783 usec per loop
Moinuddin Quadri's using set().difference()
- (0.117 usec per loop)
mquadri$ mquadri$ python -m timeit -s "l1 = set([1,2,6,8]); l2 = set([2,3,5,8]);" "l1.difference(l2)"
10000000 loops, best of 3: 0.117 usec per loop
Moinuddin Quadri's list comprehension with set
based lookup- (0.246 usec per loop)
mquadri$ python -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "[x for x in l1 if x not in l2]"
1000000 loops, best of 3: 0.246 usec per loop
Donut's list comprehension on plain list - (0.372 usec per loop)
mquadri$ python -m timeit -s "l1 = [1,2,6,8]; l2 = [2,3,5,8];" "[x for x in l1 if x not in l2]"
1000000 loops, best of 3: 0.372 usec per loop
Moinuddin Quadri's using filter()
- (0.593 usec per loop)
mquadri$ python -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "filter(lambda x: x not in l2, l1)"
1000000 loops, best of 3: 0.593 usec per loop
Daniel Pryden's generator expression with set
based lookup and type-casting to list
- (0.964 per loop) : Explicitly type-casting to list to get the final object as list
, as requested by OP. If generator expression is replaced with list comprehension, it'll become same as Moinuddin Quadri's list comprehension with set
based lookup.
mquadri$ python -m timeit -s "l1 = [1,2,6,8]; l2 = set([2,3,5,8]);" "list(x for x in l1 if x not in l2)"
1000000 loops, best of 3: 0.964 usec per loop
Akshay Hazari's using combination of functools.reduce
+ filter
-(2.78 usec per loop)
mquadri$ python -m timeit "l1 = [1,2,6,8]; l2 = [2,3,5,8];" "reduce(lambda x,y : filter(lambda z: z!=y,x) ,l1,l2)"
100000 loops, best of 3: 2.78 usec per loop
This was the clearest solution for me
var dlg2 = $('#dialog2').dialog({
position: "center",
autoOpen: false,
width: 600,
buttons: {
"Ok": function() {
$(this).dialog("close");
},
"Cancel": function() {
$(this).dialog("close");
}
}
});
dlg2.parent().appendTo('form:first');
$('#dialog_link2').click(function(){
dlg2.dialog('open');
All the content inside the dlg2
will be available to insert in your database. Don't forget to change the dialog
variable to match yours.
Just thought I would post something that I found quite useful and could be possible for someone who experiences similar needs.
The following method was a method I wrote for my JavaFX application to avoid having to cast and also avoid writing if object x instance of object b statements every time the controller was returned.
public <U> Optional<U> getController(Class<U> castKlazz){
try {
return Optional.of(fxmlLoader.<U>getController());
}catch (Exception e){
e.printStackTrace();
}
return Optional.empty();
}
The method declaration for obtaining the controller was
public <T> T getController()
By using type U passed into my method via the class object, it could be forwarded to the method get controller to tell it what type of object to return. An optional object is returned in case the wrong class is supplied and an exception occurs in which case an empty optional will be returned which we can check for.
This is what the final call to the method looked like (if present of the optional object returned takes a Consumer
getController(LoadController.class).ifPresent(controller->controller.onNotifyComplete());
Is the drive E a mapped drive? Then, it can be created by another account other than the user account. This may be the cause of the error.
I've used that notation before as well, with no ill side effects and no misunderstandings. It makes sense -- a string is just an array of characters, after all.
As of C++14 there are a number of ways to test if a floating point number value
is a NaN.
Of these ways, only checking of the bits of the number's representation,
works reliably, as noted in my original answer. In particular, std::isnan
and the often proposed check v != v
, do not work reliably and should not be used, lest your code stops working correctly when someone decides that floating point optimization is needed, and asks the compiler to do that. This situation can change, compilers can get more conforming, but for this issue that hasn't happened in the 6 years since the original answer.
For about 6 years my original answer was the selected solution for this question, which was OK. But recently a highly upvoted answer recommending the unreliable v != v
test has been selected. Hence this additional more up-to-date answer (we now have the C++11 and C++14 standards, and C++17 on the horizon).
The main ways to check for NaN-ness, as of C++14, are:
std::isnan(value) )
is the intended standard library way since C++11. isnan
apparently conflicts with the
Posix macro of the same name, but in practice that isn't a problem. The main problem is
that when floating point arithmetic optimization is requested, then with at least one main compiler, namely g++, std::isnan
returns false
for NaN argument.
(fpclassify(value) == FP_NAN) )
Suffers from the same problem as std::isnan
, i.e., is not reliable.
(value != value) )
Recommended in many SO answers. Suffers from the same problem as std::isnan
, i.e.,
is not reliable.
(value == Fp_info::quiet_NaN()) )
This is a test that with standard behavior should not detect NaNs, but that with the
optimized behavior maybe could detect NaNs (due to optimized code just comparing the
bitlevel representations directly), and perhaps combined with another way to
cover the standard un-optimized behavior, could reliably detect NaN. Unfortunately
it turned out to not work reliably.
(ilogb(value) == FP_ILOGBNAN) )
Suffers from the same problem as std::isnan
, i.e., is not reliable.
isunordered(1.2345, value) )
Suffers from the same problem as std::isnan
, i.e., is not reliable.
is_ieee754_nan( value ) )
This isn't a standard function. It's checking of the bits according to the IEEE 754
standard. It's completely reliable but the code is somewhat system-dependent.
In the following complete test code “success” is whether an expression reports Nan-ness of the value. For most expressions this measure of success, the goal of detecting NaNs and only NaNs, corresponds to their standard semantics. For the (value == Fp_info::quiet_NaN()) )
expression, however, the standard behavior is that it doesn't work as a NaN-detector.
#include <cmath> // std::isnan, std::fpclassify
#include <iostream>
#include <iomanip> // std::setw
#include <limits>
#include <limits.h> // CHAR_BIT
#include <sstream>
#include <stdint.h> // uint64_t
using namespace std;
#define TEST( x, expr, expected ) \
[&](){ \
const auto value = x; \
const bool result = expr; \
ostringstream stream; \
stream << boolalpha << #x " = " << x << ", (" #expr ") = " << result; \
cout \
<< setw( 60 ) << stream.str() << " " \
<< (result == expected? "Success" : "FAILED") \
<< endl; \
}()
#define TEST_ALL_VARIABLES( expression ) \
TEST( v, expression, true ); \
TEST( u, expression, false ); \
TEST( w, expression, false )
using Fp_info = numeric_limits<double>;
inline auto is_ieee754_nan( double const x )
-> bool
{
static constexpr bool is_claimed_ieee754 = Fp_info::is_iec559;
static constexpr int n_bits_per_byte = CHAR_BIT;
using Byte = unsigned char;
static_assert( is_claimed_ieee754, "!" );
static_assert( n_bits_per_byte == 8, "!" );
static_assert( sizeof( x ) == sizeof( uint64_t ), "!" );
#ifdef _MSC_VER
uint64_t const bits = reinterpret_cast<uint64_t const&>( x );
#else
Byte bytes[sizeof(x)];
memcpy( bytes, &x, sizeof( x ) );
uint64_t int_value;
memcpy( &int_value, bytes, sizeof( x ) );
uint64_t const& bits = int_value;
#endif
static constexpr uint64_t sign_mask = 0x8000000000000000;
static constexpr uint64_t exp_mask = 0x7FF0000000000000;
static constexpr uint64_t mantissa_mask = 0x000FFFFFFFFFFFFF;
(void) sign_mask;
return (bits & exp_mask) == exp_mask and (bits & mantissa_mask) != 0;
}
auto main()
-> int
{
double const v = Fp_info::quiet_NaN();
double const u = 3.14;
double const w = Fp_info::infinity();
cout << boolalpha << left;
cout << "Compiler claims IEEE 754 = " << Fp_info::is_iec559 << endl;
cout << endl;;
TEST_ALL_VARIABLES( std::isnan(value) ); cout << endl;
TEST_ALL_VARIABLES( (fpclassify(value) == FP_NAN) ); cout << endl;
TEST_ALL_VARIABLES( (value != value) ); cout << endl;
TEST_ALL_VARIABLES( (value == Fp_info::quiet_NaN()) ); cout << endl;
TEST_ALL_VARIABLES( (ilogb(value) == FP_ILOGBNAN) ); cout << endl;
TEST_ALL_VARIABLES( isunordered(1.2345, value) ); cout << endl;
TEST_ALL_VARIABLES( is_ieee754_nan( value ) );
}
Results with g++ (note again that the standard behavior of (value == Fp_info::quiet_NaN())
is that it doesn't work as a NaN-detector, it's just very much of practical interest here):
[C:\my\forums\so\282 (detect NaN)] > g++ --version | find "++" g++ (x86_64-win32-sjlj-rev1, Built by MinGW-W64 project) 6.3.0 [C:\my\forums\so\282 (detect NaN)] > g++ foo.cpp && a Compiler claims IEEE 754 = true v = nan, (std::isnan(value)) = true Success u = 3.14, (std::isnan(value)) = false Success w = inf, (std::isnan(value)) = false Success v = nan, ((fpclassify(value) == 0x0100)) = true Success u = 3.14, ((fpclassify(value) == 0x0100)) = false Success w = inf, ((fpclassify(value) == 0x0100)) = false Success v = nan, ((value != value)) = true Success u = 3.14, ((value != value)) = false Success w = inf, ((value != value)) = false Success v = nan, ((value == Fp_info::quiet_NaN())) = false FAILED u = 3.14, ((value == Fp_info::quiet_NaN())) = false Success w = inf, ((value == Fp_info::quiet_NaN())) = false Success v = nan, ((ilogb(value) == ((int)0x80000000))) = true Success u = 3.14, ((ilogb(value) == ((int)0x80000000))) = false Success w = inf, ((ilogb(value) == ((int)0x80000000))) = false Success v = nan, (isunordered(1.2345, value)) = true Success u = 3.14, (isunordered(1.2345, value)) = false Success w = inf, (isunordered(1.2345, value)) = false Success v = nan, (is_ieee754_nan( value )) = true Success u = 3.14, (is_ieee754_nan( value )) = false Success w = inf, (is_ieee754_nan( value )) = false Success [C:\my\forums\so\282 (detect NaN)] > g++ foo.cpp -ffast-math && a Compiler claims IEEE 754 = true v = nan, (std::isnan(value)) = false FAILED u = 3.14, (std::isnan(value)) = false Success w = inf, (std::isnan(value)) = false Success v = nan, ((fpclassify(value) == 0x0100)) = false FAILED u = 3.14, ((fpclassify(value) == 0x0100)) = false Success w = inf, ((fpclassify(value) == 0x0100)) = false Success v = nan, ((value != value)) = false FAILED u = 3.14, ((value != value)) = false Success w = inf, ((value != value)) = false Success v = nan, ((value == Fp_info::quiet_NaN())) = true Success u = 3.14, ((value == Fp_info::quiet_NaN())) = true FAILED w = inf, ((value == Fp_info::quiet_NaN())) = true FAILED v = nan, ((ilogb(value) == ((int)0x80000000))) = true Success u = 3.14, ((ilogb(value) == ((int)0x80000000))) = false Success w = inf, ((ilogb(value) == ((int)0x80000000))) = false Success v = nan, (isunordered(1.2345, value)) = false FAILED u = 3.14, (isunordered(1.2345, value)) = false Success w = inf, (isunordered(1.2345, value)) = false Success v = nan, (is_ieee754_nan( value )) = true Success u = 3.14, (is_ieee754_nan( value )) = false Success w = inf, (is_ieee754_nan( value )) = false Success [C:\my\forums\so\282 (detect NaN)] > _
Results with Visual C++:
[C:\my\forums\so\282 (detect NaN)] > cl /nologo- 2>&1 | find "++" Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23725 for x86 [C:\my\forums\so\282 (detect NaN)] > cl foo.cpp /Feb && b foo.cpp Compiler claims IEEE 754 = true v = nan, (std::isnan(value)) = true Success u = 3.14, (std::isnan(value)) = false Success w = inf, (std::isnan(value)) = false Success v = nan, ((fpclassify(value) == 2)) = true Success u = 3.14, ((fpclassify(value) == 2)) = false Success w = inf, ((fpclassify(value) == 2)) = false Success v = nan, ((value != value)) = true Success u = 3.14, ((value != value)) = false Success w = inf, ((value != value)) = false Success v = nan, ((value == Fp_info::quiet_NaN())) = false FAILED u = 3.14, ((value == Fp_info::quiet_NaN())) = false Success w = inf, ((value == Fp_info::quiet_NaN())) = false Success v = nan, ((ilogb(value) == 0x7fffffff)) = true Success u = 3.14, ((ilogb(value) == 0x7fffffff)) = false Success w = inf, ((ilogb(value) == 0x7fffffff)) = true FAILED v = nan, (isunordered(1.2345, value)) = true Success u = 3.14, (isunordered(1.2345, value)) = false Success w = inf, (isunordered(1.2345, value)) = false Success v = nan, (is_ieee754_nan( value )) = true Success u = 3.14, (is_ieee754_nan( value )) = false Success w = inf, (is_ieee754_nan( value )) = false Success [C:\my\forums\so\282 (detect NaN)] > cl foo.cpp /Feb /fp:fast && b foo.cpp Compiler claims IEEE 754 = true v = nan, (std::isnan(value)) = true Success u = 3.14, (std::isnan(value)) = false Success w = inf, (std::isnan(value)) = false Success v = nan, ((fpclassify(value) == 2)) = true Success u = 3.14, ((fpclassify(value) == 2)) = false Success w = inf, ((fpclassify(value) == 2)) = false Success v = nan, ((value != value)) = true Success u = 3.14, ((value != value)) = false Success w = inf, ((value != value)) = false Success v = nan, ((value == Fp_info::quiet_NaN())) = false FAILED u = 3.14, ((value == Fp_info::quiet_NaN())) = false Success w = inf, ((value == Fp_info::quiet_NaN())) = false Success v = nan, ((ilogb(value) == 0x7fffffff)) = true Success u = 3.14, ((ilogb(value) == 0x7fffffff)) = false Success w = inf, ((ilogb(value) == 0x7fffffff)) = true FAILED v = nan, (isunordered(1.2345, value)) = true Success u = 3.14, (isunordered(1.2345, value)) = false Success w = inf, (isunordered(1.2345, value)) = false Success v = nan, (is_ieee754_nan( value )) = true Success u = 3.14, (is_ieee754_nan( value )) = false Success w = inf, (is_ieee754_nan( value )) = false Success [C:\my\forums\so\282 (detect NaN)] > _
Summing up the above results, only direct testing of the bit-level representation, using the is_ieee754_nan
function defined in this test program, worked reliably in all cases with both g++ and Visual C++.
Addendum:
After posting the above I became aware of yet another possible to test for NaN, mentioned in another answer here, namely ((value < 0) == (value >= 0))
. That turned out to work fine with Visual C++ but failed with g++'s -ffast-math
option. Only direct bitpattern testing works reliably.
Sorry but that's just much too much overhead (above), short and quick, if you have the MapFragment, you also have to map, just do the following:
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
googleMap.setMyLocationEnabled(true)
} else {
// Show rationale and request permission.
}
Code is in Kotlin, hope you don't mind.
have fun
Btw I think this one is a duplicate of: Show Current Location inside Google Map Fragment
Unicode escapes only work in unicode strings, so this
a="\u2026"
is actually a string of 6 characters: '\', 'u', '2', '0', '2', '6'.
To make unicode out of this, use decode('unicode-escape')
:
a="\u2026"
print repr(a)
print repr(a.decode('unicode-escape'))
## '\\u2026'
## u'\u2026'
Yes, indeed. The datepicker has the maxdate property that you can set when you initialize it.
Here's the codez
$("#datepicker").datepicker({ maxDate: new Date, minDate: new Date(2007, 6, 12) });
Apart from the usages mentioned above, console.log
can also print to the terminal in node.js
. A server created with express (for eg.) can use console.log
to write to the output logger file.
To exit the script as soon as one of the commands failed, add this at the beginning:
set -e
This causes the script to exit immediately when some command that is not part of some test (like in a if [ ... ]
condition or a &&
construct) exits with a non-zero exit code.
A lookahead (that (?=
part) does not consume any input. It is a zero-width assertion (as are boundary checks and lookbehinds).
You want a regular match here, to consume the cow
portion. To capture the portion in between, you use a capturing group (just put the portion of pattern you want to capture inside parenthesis):
cow(.*)milk
No lookaheads are needed at all.
Just reposting from comments under the original post. innerHTML works in all browsers. Thanks stefita.
myElement.innerHTML = "foo";
Its of no use even if you increase your RAM size because I tried it too. I am using P4 3.00GHz processor and 3 GB RAM(changed from 1 GB to 3GB), But even the Hello world application never turned up.
Its preferable to upgrade your system.
What this means is that you are trying to print out/output a value which is at least partially uninitialized. Can you narrow it down so that you know exactly what value that is? After that, trace through your code to see where it is being initialized. Chances are, you will see that it is not being fully initialized.
If you need more help, posting the relevant sections of source code might allow someone to offer more guidance.
EDIT
I see you've found the problem. Note that valgrind watches for Conditional jump or move based on unitialized variables. What that means is that it will only give out a warning if the execution of the program is altered due to the uninitialized value (ie. the program takes a different branch in an if statement, for example). Since the actual arithmetic did not involve a conditional jump or move, valgrind did not warn you of that. Instead, it propagated the "uninitialized" status to the result of the statement that used it.
It may seem counterintuitive that it does not warn you immediately, but as mark4o pointed out, it does this because uninitialized values get used in C all the time (examples: padding in structures, the realloc()
call, etc.) so those warnings would not be very useful due to the false positive frequency.