I had the same problem, and
neither umount /path -f
,
neither umount.nfs /path -f
,
neither fuser -km /path
,
works
finally I found a simple solution >.<
sudo /etc/init.d/nfs-common restart
, then lets do the simple umount
;-)
QTcreator obeys your kde-wide configurations. If you choose "obsidian-coast" as the system-wide color scheme qt creator will be all dark as well. I know it is a partial solution but it works.
Another alternative is to use a lambda:
ent.bind("<Return>", (lambda event: name_of_function()))
Full code:
from tkinter import *
from tkinter.messagebox import showinfo
def reply(name):
showinfo(title="Reply", message = "Hello %s!" % name)
top = Tk()
top.title("Echo")
top.iconbitmap("Iconshock-Folder-Gallery.ico")
Label(top, text="Enter your name:").pack(side=TOP)
ent = Entry(top)
ent.bind("<Return>", (lambda event: reply(ent.get())))
ent.pack(side=TOP)
btn = Button(top,text="Submit", command=(lambda: reply(ent.get())))
btn.pack(side=LEFT)
top.mainloop()
As you can see, creating a lambda function with an unused variable "event" solves the problem.
As others have pointed out you are looking for std::numeric_limits<double>::quiet_NaN()
although I have to say I prefer the cppreference.com documents. Especially because this statement is a little vague:
Only meaningful if std::numeric_limits::has_quiet_NaN == true.
and it was simple to figure out what this means on this site, if you check their section on std::numeric_limits::has_quiet_NaN
it says:
This constant is meaningful for all floating-point types and is guaranteed to be true if std::numeric_limits::is_iec559 == true.
which as explained here if true
means your platform supports IEEE 754
standard. This previous thread explains this should be true for most situations.
If you're using jQuery, this solution from a comment made here is pretty slick:
$(function(){
$('form').each(function () {
var thisform = $(this);
thisform.prepend(thisform.find('button.default').clone().css({
position: 'absolute',
left: '-999px',
top: '-999px',
height: 0,
width: 0
}));
});
});
Just add class="default"
to the button you want to be the default. It puts a hidden copy of that button right at the beginning of the form.
Instead of:
input:not(disabled)not:[type="submit"]:focus {}
Use:
input:not([disabled]):not([type="submit"]):focus {}
disabled
is an attribute so it needs the brackets, and you seem to have mixed up/missing colons and parentheses on the :not()
selector.
Demo: http://jsfiddle.net/HSKPx/
One thing to note: I may be wrong, but I don't think disabled
inputs can normally receive focus, so that part may be redundant.
Alternatively, use :enabled
input:enabled:not([type="submit"]):focus { /* styles here */ }
Again, I can't think of a case where disabled input can receive focus, so it seems unnecessary.
In [9]: print?
Type: builtin_function_or_method
Base Class: <type 'builtin_function_or_method'>
String Form: <built-in function print>
Namespace: Python builtin
Docstring:
print(value, ..., sep=' ', end='\n', file=sys.stdout)
Prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file: a file-like object (stream); defaults to the current sys.stdout.
sep: string inserted between values, default a space.
end: string appended after the last value, default a newline.
I believe python just has next() and according to the doc, it throws an exception is there are no more elements.
I know this is too late for sure, but, this could help someone as well.
In my case, i found that the source file is being used by another process which was restricting from copying to the destination. I found that by using command prompt ( just copy paste the post build command to the command prompt and executed gave me the error info).
Make sure that you can copy from the command prompt,
Robocopy replaces XCopy in the newer versions of windows
Yes i agree with Mark Setchell, They are both crap. (brought to you by Microsoft)
UPDATE:
XCopy return codes:
0 - Files were copied without error.
1 - No files were found to copy.
2 - The user pressed CTRL+C to terminate xcopy. enough memory or disk space, or you entered an invalid drive name or invalid syntax on the command line.
5 - Disk write error occurred.
Robocopy returns codes:
0 - No errors occurred, and no copying was done. The source and destination directory trees are completely synchronized.
1 - One or more files were copied successfully (that is, new files have arrived).
2 - Some Extra files or directories were detected. No files were copied Examine the output log for details.
3 - (2+1) Some files were copied. Additional files were present. No failure was encountered.
4 - Some Mismatched files or directories were detected. Examine the output log. Some housekeeping may be needed.
5 - (4+1) Some files were copied. Some files were mismatched. No failure was encountered.
6 - (4+2) Additional files and mismatched files exist. No files were copied and no failures were encountered. This means that the files already exist in the destination directory
7 - (4+1+2) Files were copied, a file mismatch was present, and additional files were present.
8 - Some files or directories could not be copied (copy errors occurred and the retry limit was exceeded). Check these errors further.
16 - Serious error. Robocopy did not copy any files. Either a usage error or an error due to insufficient access privileges on the source or destination directories.
There is more details on Robocopy return values here: http://ss64.com/nt/robocopy-exit.html
SELECT
dp.state_desc + ' '
+ dp.permission_name collate latin1_general_cs_as
+ ISNULL((' ON ' + QUOTENAME(s.name) + '.' + QUOTENAME(o.name)),'')
+ ' TO ' + QUOTENAME(dpr.name)
FROM sys.database_permissions AS dp
LEFT JOIN sys.objects AS o ON dp.major_id=o.object_id
LEFT JOIN sys.schemas AS s ON o.schema_id = s.schema_id
LEFT JOIN sys.database_principals AS dpr ON dp.grantee_principal_id=dpr.principal_id
WHERE dpr.name NOT IN ('public','guest')
Slight change of the accepted answer if you want to grab permissions that are applied at database level in addition to object level. Basically switch to LEFT JOIN
and make sure to handle NULL
for object
and schema
names
.
I like prettyPhoto
prettyPhoto is a jQuery lightbox clone. Not only does it support images, it also support for videos, flash, YouTube, iframes and ajax. It’s a full blown media lightbox
Hibernate queries are case sensitive with property names (because they end up relying on getter/setter methods on the @Entity
).
Make sure you refer to the property as fileName
in the Criteria query, not filename
.
Specifically, Hibernate will call the getter method of the filename
property when executing that Criteria query, so it will look for a method called getFilename()
. But the property is called FileName
and the getter getFileName()
.
So, change the projection like so:
criteria.setProjection(Projections.property("fileName"));
Yep, you can use border: 1px solid transparent
Another solution is to use outline
on hover (and set the border to 0) which doesn't affect the document flow:
li{
display:inline-block;
padding:5px;
border:0;
}
li:hover{
outline:1px solid #FC0;
}
NB. You can only set the outline as a sharthand property, not for individual sides. It's only meant to be used for debugging but it works nicely.
In SSRS 2008 R2 use PageName property of page group: http://bidn.com/blogs/bretupdegraff/bidn-blog/234/new-features-of-ssrs-2008-r2-part-1-naming-excel-sheets-when-exporting-reports
This should do it:
<style>
body {
background:url(bg.jpg) fixed no-repeat bottom right;
}
</style>
This answer I've got following tips here, so it is not really mine. It works for me using LATIN1 or UTF-8. If you use other charsets, you probably should add them to mb_detect_encoding
function. Correct environment set is probably needed also.
function NoAccents($s){
return iconv(mb_detect_encoding($s,'UTF-8, ASCII, ISO-8859-1'),'ASCII//TRANSLIT//INGORE',$s);
}
Based on you kernel status (upper right beside "Python 3", the one that is a circle). It seems that it is still busy. It might be trapped in an endless loop or maybe you've run/display something that is not closed.
Use this. It's simple.
Public Function IsDirectoryEmpty(ByVal strDirectoryPath As String) As Boolean
Dim s() As String = _
Directory.GetFiles(strDirectoryPath)
If s.Length = 0 Then
Return True
Else
Return False
End If
End Function
It's not as easy as it seems to implement a control like that. Explorer works with shell items, not filesystem items (ex: the control panel, the printers folder, and so on). If you need to implement it i suggest to have a look at the Windows shell functions at http://msdn.microsoft.com/en-us/library/bb776426(VS.85).aspx.
while installing python packages in a global environment is doable, it is a best practice to isolate the environment between projects (creating virtual environments). Otherwise, confusion between Python versions will arise, just like your problem.
The simplest method is to use venv
library in the project directory:
python3 -m venv venv
Where the first venv
is to call the venv
package, and the second venv
defines the virtual environment directory name.
Then activate the virtual environment:
source venv/bin/activate
Once the virtual environment has been activated, your pip install ...
commands would not be interfered with any other Python version or pip version anymore.
For installing requests
:
pip install requests
Another benefit of the virtual environment is to have a concise list of libraries needed for that specific project.
*note: commands only work on Linux and Mac OS
You can rotate the dates by hacking axis notations with text()
Lines <- "Date Visits
11/1/2010 696537
11/2/2010 718748
11/3/2010 799355
11/4/2010 805800
11/5/2010 701262
11/6/2010 531579
11/7/2010 690068
11/8/2010 756947
11/9/2010 718757
11/10/2010 701768
11/11/2010 820113
11/12/2010 645259"
dm <- read.table(textConnection(Lines), header = TRUE)
dm$Date <- as.Date(dm$Date, "%m/%d/%Y")
plot(Visits ~ Date, dm, xaxt = "n", type = "l")
axis(1,at=NULL, labels=F)
text(x = dm$Date, par("usr")[3]*.97, labels = paste(dm$Date,' '), srt = 45, pos = 1, xpd = TRUE,cex=.7)
As stated above, something else is holding the files. Thing is that program doesnt look suspicious for us. I was trying to do a git pull from console, while having GitKraken opened. Closing GitKraken fixed the problem.
As mentioned in the documentation, you should add a rule to your CSS to hide it based on the ng-cloak
attribute:
[ng\:cloak], [ng-cloak], .ng-cloak {
display: none;
}
We use similar tricks on the "Built with Angular" site, which you can view the source of on Github: https://github.com/angular/builtwith.angularjs.org
Hope that helps!
Your webapp has servletcontainer specific libraries like servlet-api.jar file in its /WEB-INF/lib. This is not right.
Remove them all.
The /WEB-INF/lib should contain only the libraries specific to the webapp, not to the servletcontainer. The servletcontainer (like Tomcat) is the one who should already provide the servletcontainer specific libraries.
If you supply libraries from an arbitrary servletcontainer of a different make/version, you'll run into this kind of problems because your webapp wouldn't be able to run on a servletcontainer of a different make/version than where those libraries are originated from.
How to solve: In Eclipse Right click on the project in eclipse Properties -> Java Build Path -> Add library -> Server Runtime Library -> Apache Tomcat
Im Maven Project:-
add follwing line in pom.xml file
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${default.javax.servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>${default.javax.servlet.jsp.version}</version>
<scope>provided</scope>
</dependency>
We can use versionKey: false in Schema definition
'use strict';
const mongoose = require('mongoose');
export class Account extends mongoose.Schema {
constructor(manager) {
var trans = {
tran_date: Date,
particulars: String,
debit: Number,
credit: Number,
balance: Number
}
super({
account_number: Number,
account_name: String,
ifsc_code: String,
password: String,
currency: String,
balance: Number,
beneficiaries: Array,
transaction: [trans]
}, {
versionKey: false // set to false then it wont create in mongodb
});
this.pre('remove', function(next) {
manager
.getModel(BENEFICIARY_MODEL)
.remove({
_id: {
$in: this.beneficiaries
}
})
.exec();
next();
});
}
}
NOTE: This answer is from 2011. It was a really good answer back then, but as of 2015, native HTML properties are supported by most browsers, so there's (usually) no need to implement such custom logic in JS. See Edi's answer and the docs.
Before the file is uploaded, you can check the file's extension using Javascript, and prevent the form being submitted if it doesn't match. The name of the file to be uploaded is stored in the "value" field of the form element.
Here's a simple example that only allows files that end in ".gif" to be uploaded:
<script type="text/javascript">
function checkFile() {
var fileElement = document.getElementById("uploadFile");
var fileExtension = "";
if (fileElement.value.lastIndexOf(".") > 0) {
fileExtension = fileElement.value.substring(fileElement.value.lastIndexOf(".") + 1, fileElement.value.length);
}
if (fileExtension.toLowerCase() == "gif") {
return true;
}
else {
alert("You must select a GIF file for upload");
return false;
}
}
</script>
<form action="upload.aspx" enctype="multipart/form-data" onsubmit="return checkFile();">
<input name="uploadFile" id="uploadFile" type="file" />
<input type="submit" />
</form>
However, this method is not foolproof. Sean Haddy is correct that you always want to check on the server side, because users can defeat your Javascript checking by turning off javascript, or editing your code after it arrives in their browser. Definitely check server-side in addition to the client-side check. Also I recommend checking for size server-side too, so that users don't crash your server with a 2 GB file (there's no way that I know of to check file size on the client side without using Flash or a Java applet or something).
However, checking client side before hand using the method I've given here is still useful, because it can prevent mistakes and is a minor deterrent to non-serious mischief.
According to http://www.w3schools.com/css/css_align.asp, setting the left and right margins to auto specifies that they should split the available margin equally. The result is a centered element:
margin-left: auto;margin-right: auto;
Use this code numberOnly will contain your desired output.
String str="sdfvsdf68fsdfsf8999fsdf09";
String numberOnly= str.replaceAll("[^0-9]", "");
guys. I had the same problem before when I'm trying import a .aar package into my project, and unfortunately before make the .aar package as a module-dependence of my project, I had two modules (one about ROS-ANDROID-CV-BRIDGE, one is OPENCV-FOR-ANDROID) already. So, I got this error as you guys meet:
Error:Could not find method android() for arguments [org.ros.gradle_plugins.RosAndroidPlugin$_apply_closure2_closure4@7e550e0e] on project ‘:xxx’ of type org.gradle.api.Project.
So, it's the painful gradle-structure caused this problem when you have several modules in your project, and worse, they're imported in different way or have different types (.jar/.aar packages or just a project of Java library). And it's really a headache matter to make the configuration like compile-version, library dependencies etc. in each subproject compatible with the main-project.
I solved my problem just follow this steps:
? Copy .aar package in app/libs.
? Add this in app/build.gradle file:
repositories {
flatDir {
dirs 'libs' //this way we can find the .aar file in libs folder
}
}
? Add this in your add build.gradle file of the module which you want to apply the .aar dependence (in my situation, just add this in my app/build.gradle file):
dependencies {
compile(name:'package_name', ext:'aar')
}
So, if it's possible, just try export your module-dependence as a .aar package, and then follow this way import it to your main-project. Anyway, I hope this can be a good suggestion and would solve your problem if you have the same situation with me.
Your array is of byte
primitives, but you're trying to call a method on them.
You don't need to do anything explicit to convert a byte
to an int
, just:
int i=rno[0];
...since it's not a downcast.
Note that the default behavior of byte
-to-int
conversion is to preserve the sign of the value (remember byte
is a signed type in Java). So for instance:
byte b1 = -100;
int i1 = b1;
System.out.println(i1); // -100
If you were thinking of the byte
as unsigned (156) rather than signed (-100), as of Java 8 there's Byte.toUnsignedInt
:
byte b2 = -100; // Or `= (byte)156;`
int = Byte.toUnsignedInt(b2);
System.out.println(i2); // 156
Prior to Java 8, to get the equivalent value in the int
you'd need to mask off the sign bits:
byte b2 = -100; // Or `= (byte)156;`
int i2 = (b2 & 0xFF);
System.out.println(i2); // 156
Just for completeness #1: If you did want to use the various methods of Byte
for some reason (you don't need to here), you could use a boxing conversion:
Byte b = rno[0]; // Boxing conversion converts `byte` to `Byte`
int i = b.intValue();
Or the Byte
constructor:
Byte b = new Byte(rno[0]);
int i = b.intValue();
But again, you don't need that here.
Just for completeness #2: If it were a downcast (e.g., if you were trying to convert an int
to a byte
), all you need is a cast:
int i;
byte b;
i = 5;
b = (byte)i;
This assures the compiler that you know it's a downcast, so you don't get the "Possible loss of precision" error.
You could decompose the date into it's constituent parts and then concatenate them together like this:
MsgBox(Now.Day & "/" & Now.Month & "/" & Now.Year)
Since this setting is not an attribute
It is an attribute.
Some attributes are defined as boolean, which means you can specify their value and leave everything else out. i.e. Instead of disabled="disabled", you include only the bold part. In HTML 4, you should include only the bold part as the full version is marked as a feature with limited support (although that is less true now then when the spec was written).
As of HTML 5, the rules have changed and now you include only the name and not the value. This makes no practical difference because the name and the value are the same.
The DOM property is also called disabled
and is a boolean that takes true
or false
.
foo.disabled = true;
In theory you can also foo.setAttribute('disabled', 'disabled');
and foo.removeAttribute("disabled")
, but I wouldn't trust this with older versions of Internet Explorer (which are notoriously buggy when it comes to setAttribute
).
Having a look at MySQL documentation for the string functions, we can also use CHAR_LENGTH()
and CHARACTER_LENGTH()
as well.
It might be suggested that in most cases where you use a static variable, you really want to be using the singleton pattern.
The problem with global states is that sometimes what makes sense as global in a simpler context, needs to be a bit more flexible in a practical context, and this is where the singleton pattern becomes useful.
git checkout <target_branch>
git checkout <source_branch> <file_path>
This worked for me...
$ sudo apt-get install python2.7-dev
Default interpreters from Microsoft are done in a way, that causes them exit when they reach EOF. If rake is another batch file, command interpreter switches to it and exits when rake interpretation is finished. To prevent this write:
@echo off
cls
call rake
pause
IMHO, call operator will lauch another instance of intepretator thereby preventing the current one interpreter from switching to another input file.
In jquery, u can delcare variable two styles.
One is,
$.name = 'anirudha';
alert($.name);
Second is,
var hText = $("#head1").text();
Second is used when you read data from textbox
, label
, etc.
Joining a WORKGROUP then rejoining the domain fixed this issue for me.
I got this error while using Virtual Box VM's. The issue started to happen when I moved the VM files to a new drive location or computer.
Hope this helps the VM folks.
Your jsfiddle does not work anymore. I've fixed it: http://jsfiddle.net/tkrotoff/bgC6E/40/ using React 16 and ES6 classes.
class Adaptive_Input extends React.Component {
handle_change(e) {
var new_text = e.currentTarget.value;
this.props.on_Input_Change(new_text);
}
render() {
return (
<div className="adaptive_placeholder_input_container">
<input
className="adaptive_input"
type="text"
required="required"
onChange={this.handle_change.bind(this)} />
<label
className="adaptive_placeholder"
alt={this.props.initial}
placeholder={this.props.focused} />
</div>
);
}
}
class Form extends React.Component {
render() {
return (
<form>
<Adaptive_Input
initial={'Name Input'}
focused={'Name Input'}
on_Input_Change={this.props.handle_text_input} />
<Adaptive_Input
initial={'Value 1'}
focused={'Value 1'}
on_Input_Change={this.props.handle_value_1_input} />
<Adaptive_Input
initial={'Value 2'}
focused={'Value 2'}
on_Input_Change={this.props.handle_value_2_input} />
</form>
);
}
}
class Page extends React.Component {
constructor(props) {
super(props);
this.state = {
Name: 'No Name',
Value_1: '0',
Value_2: '0',
Display_Value: '0'
};
}
handle_text_input(new_text) {
this.setState({
Name: new_text
});
}
handle_value_1_input(new_value) {
new_value = parseInt(new_value);
var updated_display = new_value + parseInt(this.state.Value_2);
updated_display = updated_display.toString();
this.setState({
Value_1: new_value,
Display_Value: updated_display
});
}
handle_value_2_input(new_value) {
new_value = parseInt(new_value);
var updated_display = parseInt(this.state.Value_1) + new_value;
updated_display = updated_display.toString();
this.setState({
Value_2: new_value,
Display_Value: updated_display
});
}
render() {
return(
<div>
<h2>{this.state.Name}</h2>
<h2>Value 1 + Value 2 = {this.state.Display_Value}</h2>
<Form
handle_text_input={this.handle_text_input.bind(this)}
handle_value_1_input={this.handle_value_1_input.bind(this)}
handle_value_2_input={this.handle_value_2_input.bind(this)}
/>
</div>
);
}
}
ReactDOM.render(<Page />, document.getElementById('app'));
And now the same code hacked with form validation thanks to this library: https://github.com/tkrotoff/react-form-with-constraints => http://jsfiddle.net/tkrotoff/k4qa4heg/
const { FormWithConstraints, FieldFeedbacks, FieldFeedback } = ReactFormWithConstraints;
class Adaptive_Input extends React.Component {
static contextTypes = {
form: PropTypes.object.isRequired
};
constructor(props) {
super(props);
this.state = {
field: undefined
};
this.fieldWillValidate = this.fieldWillValidate.bind(this);
this.fieldDidValidate = this.fieldDidValidate.bind(this);
}
componentWillMount() {
this.context.form.addFieldWillValidateEventListener(this.fieldWillValidate);
this.context.form.addFieldDidValidateEventListener(this.fieldDidValidate);
}
componentWillUnmount() {
this.context.form.removeFieldWillValidateEventListener(this.fieldWillValidate);
this.context.form.removeFieldDidValidateEventListener(this.fieldDidValidate);
}
fieldWillValidate(fieldName) {
if (fieldName === this.props.name) this.setState({field: undefined});
}
fieldDidValidate(field) {
if (field.name === this.props.name) this.setState({field});
}
handle_change(e) {
var new_text = e.currentTarget.value;
this.props.on_Input_Change(e, new_text);
}
render() {
const { field } = this.state;
let className = 'adaptive_placeholder_input_container';
if (field !== undefined) {
if (field.hasErrors()) className += ' error';
if (field.hasWarnings()) className += ' warning';
}
return (
<div className={className}>
<input
type={this.props.type}
name={this.props.name}
className="adaptive_input"
required
onChange={this.handle_change.bind(this)} />
<label
className="adaptive_placeholder"
alt={this.props.initial}
placeholder={this.props.focused} />
</div>
);
}
}
class Form extends React.Component {
constructor(props) {
super(props);
this.state = {
Name: 'No Name',
Value_1: '0',
Value_2: '0',
Display_Value: '0'
};
}
handle_text_input(e, new_text) {
this.form.validateFields(e.currentTarget);
this.setState({
Name: new_text
});
}
handle_value_1_input(e, new_value) {
this.form.validateFields(e.currentTarget);
if (this.form.isValid()) {
new_value = parseInt(new_value);
var updated_display = new_value + parseInt(this.state.Value_2);
updated_display = updated_display.toString();
this.setState({
Value_1: new_value,
Display_Value: updated_display
});
}
else {
this.setState({
Display_Value: 'Error'
});
}
}
handle_value_2_input(e, new_value) {
this.form.validateFields(e.currentTarget);
if (this.form.isValid()) {
new_value = parseInt(new_value);
var updated_display = parseInt(this.state.Value_1) + new_value;
updated_display = updated_display.toString();
this.setState({
Value_2: new_value,
Display_Value: updated_display
});
}
else {
this.setState({
Display_Value: 'Error'
});
}
}
render() {
return(
<div>
<h2>Name: {this.state.Name}</h2>
<h2>Value 1 + Value 2 = {this.state.Display_Value}</h2>
<FormWithConstraints ref={form => this.form = form} noValidate>
<Adaptive_Input
type="text"
name="name_input"
initial={'Name Input'}
focused={'Name Input'}
on_Input_Change={this.handle_text_input.bind(this)} />
<FieldFeedbacks for="name_input">
<FieldFeedback when="*" error />
<FieldFeedback when={value => !/^\w+$/.test(value)} warning>Should only contain alphanumeric characters</FieldFeedback>
</FieldFeedbacks>
<Adaptive_Input
type="number"
name="value_1_input"
initial={'Value 1'}
focused={'Value 1'}
on_Input_Change={this.handle_value_1_input.bind(this)} />
<FieldFeedbacks for="value_1_input">
<FieldFeedback when="*" />
</FieldFeedbacks>
<Adaptive_Input
type="number"
name="value_2_input"
initial={'Value 2'}
focused={'Value 2'}
on_Input_Change={this.handle_value_2_input.bind(this)} />
<FieldFeedbacks for="value_2_input">
<FieldFeedback when="*" />
</FieldFeedbacks>
</FormWithConstraints>
</div>
);
}
}
ReactDOM.render(<Form />, document.getElementById('app'));
The proposed solution here is hackish as I've tried to keep it close to the original jsfiddle. For proper form validation with react-form-with-constraints, check https://github.com/tkrotoff/react-form-with-constraints#examples
Well... I see that an answer was already accepted... but I think you should see another solutions anyway:
/* EXAMPLE */
DECLARE @UserAliases TABLE(UserId INT , Alias VARCHAR(10))
INSERT INTO @UserAliases (UserId,Alias) SELECT 1,'MrX'
UNION ALL SELECT 1,'MrY' UNION ALL SELECT 1,'MrA'
UNION ALL SELECT 2,'Abc' UNION ALL SELECT 2,'Xyz'
/* QUERY */
;WITH tmp AS ( SELECT DISTINCT UserId FROM @UserAliases )
SELECT
LEFT(tmp.UserId, 10) +
'/ ' +
STUFF(
( SELECT ', '+Alias
FROM @UserAliases
WHERE UserId = tmp.UserId
FOR XML PATH('')
)
, 1, 2, ''
) AS [UserId/Alias]
FROM tmp
/* -- OUTPUT
UserId/Alias
1/ MrX, MrY, MrA
2/ Abc, Xyz
*/
git checkout master -- myplugin.js
master = branch name
myplugin.js = file name
Web Hosting Challenge
You have to remember that none of the machine configuration options are available if you are hosted on a shared server as many of us (smaller companies and individuals) are.
ASP.NET MVC Overhead
My site takes at least 30 seconds when it hasn't been hit in over 20 minutes (and the web app has been stopped). It is terrible.
Another Way to Test Performance
There's another way to test if it is your ASP.NET MVC start up or something else. Drop a normal HTML page on your site where you can hit it directly.
If the problem is related to ASP.NET MVC start up then the HTML page will render almost immediately even when the web app hasn't been started.
That's how I first recognized that the problem was in the ASP.NET MVC startup.
I loaded an HTML page at any time and it would load blazing fast. Then, after hitting that HTML page I'd hit one of my ASP.NET MVC URLs and I'd get the Chrome message "Waiting for raddev.us..."
Another Test With Helpful Script
After that I wrote a LINQPad (check out http://linqpad.net for more) script that would hit my web site every 8 minutes (less than the time for the app to unload -- which should be 20 minutes) and I let it run for hours.
While the script was running I hit my web site and every time my site came up blazingly fast. This gives me a good idea that most likely the slowness I was experiencing was because of ASP.NET MVC startup times.
Get LinqPad and you can run the following script -- just change the URL to your own and let it run and you can test this easily. Good luck.
NOTE: In LinqPad you'll need to press F4 and add a reference to System.Net to add the library which will retrieve your page.
ALSO : make sure you change the String URL variable to point at a URL that will load a route from your ASP.NET MVC site so the engine will run.
System.Timers.Timer webKeepAlive = new System.Timers.Timer();
Int64 counter = 0;
void Main()
{
webKeepAlive.Interval = 5000;
webKeepAlive.Elapsed += WebKeepAlive_Elapsed;
webKeepAlive.Start();
}
private void WebKeepAlive_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
webKeepAlive.Stop();
try
{
// ONLY the first time it retrieves the content it will print the string
String finalHtml = GetWebContent();
if (counter < 1)
{
Console.WriteLine(finalHtml);
}
counter++;
}
finally
{
webKeepAlive.Interval = 480000; // every 8 minutes
webKeepAlive.Start();
}
}
public String GetWebContent()
{
try
{
String URL = "http://YOURURL.COM";
WebRequest request = WebRequest.Create(URL);
WebResponse response = request.GetResponse();
Stream data = response.GetResponseStream();
string html = String.Empty;
using (StreamReader sr = new StreamReader(data))
{
html = sr.ReadToEnd();
}
Console.WriteLine (String.Format("{0} : success",DateTime.Now));
return html;
}
catch (Exception ex)
{
Console.WriteLine (String.Format("{0} -- GetWebContent() : {1}",DateTime.Now,ex.Message));
return "fail";
}
}
Depending on if your regex flavor supports it, I might use:
\b[A-Z]{2}\d{6}\b # Ensure there are "word boundaries" on either side, or
(?<![A-Z])[A-Z]{2}\d{6}(?!\d) # Ensure there isn't a uppercase letter before
# and that there is not a digit after
I was recently facing the same problem. This Error was showing on my screen after running my project main file. Error:java: invalid source release: 11 Follow the steps to resolve this error
After running You will see error is resolved..
The pack
method sizes the frame so that all its contents are at or above their preferred sizes. An alternative to pack is to establish a frame size explicitly by calling setSize
or setBounds
(which also sets the frame location). In general, using pack is preferable to calling setSize
, since pack leaves the frame layout manager in charge of the frame size, and layout managers are good at adjusting to platform dependencies and other factors that affect component size.
From Java tutorial
You should also refer to Javadocs any time you need additional information on any Java API
Parse timespan to DateTime and then use Format ("hh:mm:tt"). For example.
TimeSpan ts = new TimeSpan(16, 00, 00);
DateTime dtTemp = DateTime.ParseExact(ts.ToString(), "HH:mm:ss", CultureInfo.InvariantCulture);
string str = dtTemp.ToString("hh:mm tt");
str
will be:
str = "04:00 PM"
maybe it is too rude, but works for me. restart docker service itself
sudo service docker restart
hope it works for you also!
On Debian, Ubuntu or Linux Mint:
$ sudo apt-get install rubygems ruby-dev
On CentOS, Fedora or RHEL:
$ sudo yum install rubygems ruby-devel
You could use memset, if you sure about the length.
memset(ptr, 0x00, length)
I'd like to make it simple for you. the reason of " 'DataFrame' object has no attribute 'Number'/'Close'/or any col name " is because you are looking at the col name and it seems to be "Number" but in reality it is " Number" or "Number " , that extra space is because in the excel sheet col name is written in that format. You can change it in excel or you can write data.columns = data.columns.str.strip() / df.columns = df.columns.str.strip() but the chances are that it will throw the same error in particular in some cases after the query. changing name in excel sheet will work definitely.
Check out DBGhost http://www.innovartis.co.uk/. I have used in an automated fashion for 2 years now and it works great. It allows our DB builds to happen much like a Java or C build happens, except for the database. You know what I mean.
Double check your autoloader's requirements & namespaces.
/Path/ClassName
) or with a use
statement at the top of your file.Try this
static DataTable ConvertToDatatable(List<Item> list)
{
DataTable dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Price");
dt.Columns.Add("URL");
foreach (var item in list)
{
var row = dt.NewRow();
row["Name"] = item.Name;
row["Price"] = Convert.ToString(item.Price);
row["URL"] = item.URL;
dt.Rows.Add(row);
}
return dt;
}
Hmm..i tried everything to get url to user image.The perfect solution was fql use like this->
$fql_b = 'SELECT pic from user where uid = ' . $user_id;
$ret_obj_b = $facebook->api(array(
'method' => 'fql.query',
'query' => $fql_b,
));
$dp_url =$ret_obj_b[0]['pic'];
replace pic by big,pic_square to get other desired results. Hope IT HELPED....
+ theme(plot.title = element_text(size=22))
Here is the full set of things you can change in element_text
:
element_text(family = NULL, face = NULL, colour = NULL, size = NULL,
hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL,
color = NULL)
There is a check placed at Yarn level for Virtual and Physical memory usage ratio. Issue is not only that VM doesn't have sufficient physical memory. But it is because Virtual memory usage is more than expected for given physical memory.
Note : This is happening on Centos/RHEL 6 due to its aggressive allocation of virtual memory.
It can be resolved either by :
Disable virtual memory usage check by setting yarn.nodemanager.vmem-check-enabled to false;
Increase VM:PM ratio by setting yarn.nodemanager.vmem-pmem-ratio to some higher value.
References :
https://issues.apache.org/jira/browse/HADOOP-11364
http://blog.cloudera.com/blog/2014/04/apache-hadoop-yarn-avoiding-6-time-consuming-gotchas/
Add following property in yarn-site.xml
<property>
<name>yarn.nodemanager.vmem-check-enabled</name>
<value>false</value>
<description>Whether virtual memory limits will be enforced for containers</description>
</property>
<property>
<name>yarn.nodemanager.vmem-pmem-ratio</name>
<value>4</value>
<description>Ratio between virtual memory to physical memory when setting memory limits for containers</description>
</property>
From my understanding, Google Chrome utilizes the iOS's UIWebView rather than a full blown implementation of Chrome like the Android counterpart.
git reflog //find the hash of the commit that you want to checkout
git checkout <commit number>>
import java.lang.Runtime;
Process run = Runtime.getRuntime().exec("cmd.exe", "/c", "Start", "path of the bat file");
This will work for you and is easy to use.
html:
<form method="post" name="form1" id="form1">
<input id="submit" name="submit" type="submit" value="Submit" onclick="eatFood();" />
</form>
Javascript: to submit the form using javascript
function eatFood() {
document.getElementById('form1').submit();
}
to show onclick message
function eatFood() {
alert('Form has been submitted');
}
Introduction
Your title “Keep Me Logged In” - the best approach make it difficult for me to know where to start because if you are looking at best approach then you would have to consideration the following :
Cookies
Cookies are vulnerable, Between common browser cookie-theft vulnerabilities and cross-site scripting attacks we must accept that cookies are not safe. To help improve security you must note that php
setcookies
has additional functionality such as
bool setcookie ( string $name [, string $value [, int $expire = 0 [, string $path [, string $domain [, bool $secure = false [, bool $httponly = false ]]]]]] )
Definitions
Simple Approach
A simple solution would be :
The above case study summarizes all example given on this page but they disadvantages is that
Better Solution
A better solution would be
Example Code
// Set privateKey
// This should be saved securely
$key = 'fc4d57ed55a78de1a7b31e711866ef5a2848442349f52cd470008f6d30d47282';
$key = pack("H*", $key); // They key is used in binary form
// Am Using Memecahe as Sample Database
$db = new Memcache();
$db->addserver("127.0.0.1");
try {
// Start Remember Me
$rememberMe = new RememberMe($key);
$rememberMe->setDB($db); // set example database
// Check if remember me is present
if ($data = $rememberMe->auth()) {
printf("Returning User %s\n", $data['user']);
// Limit Acces Level
// Disable Change of password and private information etc
} else {
// Sample user
$user = "baba";
// Do normal login
$rememberMe->remember($user);
printf("New Account %s\n", $user);
}
} catch (Exception $e) {
printf("#Error %s\n", $e->getMessage());
}
Class Used
class RememberMe {
private $key = null;
private $db;
function __construct($privatekey) {
$this->key = $privatekey;
}
public function setDB($db) {
$this->db = $db;
}
public function auth() {
// Check if remeber me cookie is present
if (! isset($_COOKIE["auto"]) || empty($_COOKIE["auto"])) {
return false;
}
// Decode cookie value
if (! $cookie = @json_decode($_COOKIE["auto"], true)) {
return false;
}
// Check all parameters
if (! (isset($cookie['user']) || isset($cookie['token']) || isset($cookie['signature']))) {
return false;
}
$var = $cookie['user'] . $cookie['token'];
// Check Signature
if (! $this->verify($var, $cookie['signature'])) {
throw new Exception("Cokies has been tampared with");
}
// Check Database
$info = $this->db->get($cookie['user']);
if (! $info) {
return false; // User must have deleted accout
}
// Check User Data
if (! $info = json_decode($info, true)) {
throw new Exception("User Data corrupted");
}
// Verify Token
if ($info['token'] !== $cookie['token']) {
throw new Exception("System Hijacked or User use another browser");
}
/**
* Important
* To make sure the cookie is always change
* reset the Token information
*/
$this->remember($info['user']);
return $info;
}
public function remember($user) {
$cookie = [
"user" => $user,
"token" => $this->getRand(64),
"signature" => null
];
$cookie['signature'] = $this->hash($cookie['user'] . $cookie['token']);
$encoded = json_encode($cookie);
// Add User to database
$this->db->set($user, $encoded);
/**
* Set Cookies
* In production enviroment Use
* setcookie("auto", $encoded, time() + $expiration, "/~root/",
* "example.com", 1, 1);
*/
setcookie("auto", $encoded); // Sample
}
public function verify($data, $hash) {
$rand = substr($hash, 0, 4);
return $this->hash($data, $rand) === $hash;
}
private function hash($value, $rand = null) {
$rand = $rand === null ? $this->getRand(4) : $rand;
return $rand . bin2hex(hash_hmac('sha256', $value . $rand, $this->key, true));
}
private function getRand($length) {
switch (true) {
case function_exists("mcrypt_create_iv") :
$r = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
break;
case function_exists("openssl_random_pseudo_bytes") :
$r = openssl_random_pseudo_bytes($length);
break;
case is_readable('/dev/urandom') : // deceze
$r = file_get_contents('/dev/urandom', false, null, 0, $length);
break;
default :
$i = 0;
$r = "";
while($i ++ < $length) {
$r .= chr(mt_rand(0, 255));
}
break;
}
return substr(bin2hex($r), 0, $length);
}
}
Testing in Firefox & Chrome
Advantage
Disadvantage
Quick Fix
Multiple Cookie Approach
When an attacker is about to steal cookies the only focus it on a particular website or domain eg. example.com
But really you can authenticate a user from 2 different domains (example.com & fakeaddsite.com) and make it look like "Advert Cookie"
Some people might wonder how can you use 2 different cookies ? Well its possible, imagine example.com = localhost
and fakeaddsite.com = 192.168.1.120
. If you inspect the cookies it would look like this
From the image above
192.168.1.120
HTTP_REFERER
REMOTE_ADDR
Advantage
Disadvantage
Improvement
ajax
@RequestMapping(value="/register",method=RequestMethod.POST)
public ModelAndView postRegisterPage(HttpServletRequest request,HttpServletResponse response,
@ModelAttribute("bean")RegisterModel bean)
{
RegisterService service = new RegisterService();
boolean b = service.saveUser(bean);
if(b)
{
return new ModelAndView("registerPage","errorMessage","Registered Successfully!");
}
else
{
return new ModelAndView("registerPage","errorMessage","ERROR!!");
}
}
/* "registerPage" is the .jsp page -> which will viewed.
/* "errorMessage" is the variable that could be displayed in page using -> **${errorMessage}**
/* "Registered Successfully!" or "ERROR!!" is the message will be printed based on **if-else condition**
You need to do this npm install --global gulp
. It works for me and i also had this problem. It because you didn't install globally this package.
As Seth stated thread safe means that a method or class instance can be used by multiple threads at the same time without any problems occuring.
Consider the following method:
private int myInt = 0;
public int AddOne()
{
int tmp = myInt;
tmp = tmp + 1;
myInt = tmp;
return tmp;
}
Now thread A
and thread B
both would like to execute AddOne()
. but A
starts first and reads the value of myInt (0)
into tmp
. Now for some reason the scheduler decides to halt thread A
and defer execution to thread B
. Thread B
now also reads the value of myInt
(still 0
) into it's own variable tmp
. Thread B
finishes the entire method, so in the end myInt = 1
. And 1
is returned. Now it's Thread A
's turn again. Thread A
continues. And adds 1
to tmp
(tmp
was 0
for thread A
). And then saves this value in myInt
. myInt
is again 1
.
So in this case the method AddOne()
was called two times, but because the method was not implemented in a thread safe way the value of myInt
is not 2
, as expected, but 1
because the second thread read the variable myInt
before the first thread finished updating it.
Creating thread safe methods is very hard in non trivial cases. And there are quite a few techniques. In Java you can mark a method as synchronized, this means that only one thread can execute that method at a given time. The other threads wait in line. This makes a method thread safe, but if there is a lot of work to be done in a method, then this wastes a lot of time. Another technique is to 'mark only a small part of a method as synchronized' by creating a lock or semaphore, and locking this small part (usually called the critical section). There are even some methods that are implemented as lockless thread safe, which means that they are built in such a way that multiple threads can race through them at the same time without ever causing problems, this can be the case when a method only executes one atomic call. Atomic calls are calls that can't be interrupted and can only be done by one thread at a time.
DecimalFormat decimalFormat = new DecimalFormat(".#");
String result = decimalFormat.format(12.763); // --> 12.7
Check your servers error log, typically /var/log/apache2/error.log
.
You can't insert comments inside xml tags.
Bad
<Window xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
<!-- Cool comment -->
xmlns:System="clr-namespace:System;assembly=mscorlib">
Good
<Window xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:System="clr-namespace:System;assembly=mscorlib">
<!-- Cool comment -->
The error Event
the onerror
handler receives is a simple event not containing such information:
If the user agent was required to fail the WebSocket connection or the WebSocket connection is closed with prejudice, fire a simple event named error at the WebSocket object.
You may have better luck listening for the close
event, which is a CloseEvent
and indeed has a CloseEvent.code
property containing a numerical code according to RFC 6455 11.7 and a CloseEvent.reason
string property.
Please note however, that CloseEvent.code
(and CloseEvent.reason
) are limited in such a way that network probing and other security issues are avoided.
The response is an array.
var_dump($pjs[0]->{'player_name'});
try This Code
var check = function(evt){_x000D_
_x000D_
var data = document.getElementById('num').value;_x000D_
if((evt.charCode>= 48 && evt.charCode <= 57) || evt.charCode== 46 ||evt.charCode == 0){_x000D_
if(data.indexOf('.') > -1){_x000D_
if(evt.charCode== 46)_x000D_
evt.preventDefault();_x000D_
}_x000D_
}else_x000D_
evt.preventDefault();_x000D_
};_x000D_
_x000D_
document.getElementById('num').addEventListener('keypress',check);
_x000D_
<!DOCTYPE html>_x000D_
<html>_x000D_
<head>_x000D_
<title>Page Title</title>_x000D_
</head>_x000D_
<body>_x000D_
<input type="text" id="num" value="" />_x000D_
_x000D_
_x000D_
_x000D_
</body>_x000D_
</html>
_x000D_
Yes, it is. Compute the Fast Fourier Transform and analyse the result. The Fourier transform tells you which frequencies are present in the image. If there is a low amount of high frequencies, then the image is blurry.
Defining the terms 'low' and 'high' is up to you.
Edit:
As stated in the comments, if you want a single float representing the blurryness of a given image, you have to work out a suitable metric.
nikie's answer provide such a metric. Convolve the image with a Laplacian kernel:
1
1 -4 1
1
And use a robust maximum metric on the output to get a number which you can use for thresholding. Try to avoid smoothing too much the images before computing the Laplacian, because you will only find out that a smoothed image is indeed blurry :-).
You need access to the object.... you can't simply ask the form class....
eg...
you would of done some thing like
Form1.txtLog.Text = "blah"
instead of
Form1 blah = new Form1();
blah.txtLog.Text = "hello"
To add to Preston's answer, here's the complete list of the HttpContent
derived classes available in the standard library:
Credit: https://pfelix.wordpress.com/2012/01/16/the-new-system-net-http-classes-message-content/
There's also a supposed ObjectContent
but I was unable to find it in ASP.NET Core
.
Of course, you could skip the whole HttpContent
thing all together with Microsoft.AspNet.WebApi.Client
extensions (you'll have to do an import to get it to work in ASP.NET Core for now: https://github.com/aspnet/Home/issues/1558) and then you can do things like:
var response = await client.PostAsJsonAsync("AddNewArticle", new Article
{
Title = "New Article Title",
Body = "New Article Body"
});
The accepted answer works well and one can also just use the
If Exists (...) Then ... End If;
syntax in Mysql procedures (if acceptable for circumstance) and it will behave as desired/expected. Here's a link to a more thorough source/description: https://dba.stackexchange.com/questions/99120/if-exists-then-update-else-insert
One problem with the solution by @SnowyR is that it does not really behave like "If Exists" in that the (Select 1 = 1 ...) subquery could return more than one row in some circumstances and so it gives an error. I don't have permissions to respond to that answer directly so I thought I'd mention it here in case it saves someone else the trouble I experienced and so others might know that it is not an equivalent solution to MSSQLServer "if exists"!
Try this for Set:
Set<String> listOfTopicAuthors = .....
List<String> setList = new ArrayList<String>(listOfTopicAuthors);
Try this for Map:
Map<String, String> listOfTopicAuthors = .....
// List of values:
List<String> mapValueList = new ArrayList<String>(listOfTopicAuthors.values());
// List of keys:
List<String> mapKeyList = new ArrayList<String>(listOfTopicAuthors.KeySet());
That's part of the syntax of the new lambda expressions, to be introduced in Java 8. There are a couple of online tutorials to get the hang of it, here's a link to one. Basically, the ->
separates the parameters (left-side) from the implementation (right side).
The general syntax for using lambda expressions is
(Parameters) -> { Body }
where the ->
separates parameters and lambda expression body.
The parameters are enclosed in parentheses which is the same way as for methods and the lambda expression body is a block of code enclosed in braces.
Python 2.5 includes an uuid implementation which (in at least one version) needs the mac address. You can import the mac finding function into your own code easily:
from uuid import getnode as get_mac
mac = get_mac()
The return value is the mac address as 48 bit integer.
margin: auto;
How to edit one specific row/tuple in Server Management Studio 2008/2012/2014/2016
Step 1: Right button mouse > Select "Edit Top 200 Rows"
Step 2: Navigate to Query Designer > Pane > SQL (Shortcut: Ctrl+3)
Step 3: Modify the query
Step 4: Right button mouse > Select "Execute SQL" (Shortcut: Ctrl+R)
A keystore contains private keys, and the certificates with their corresponding public keys.
A truststore contains certificates from other parties that you expect to communicate with, or from Certificate Authorities that you trust to identify other parties.
Even though the above answer appears to be correct, I wanted to add a (hopefully) more readable example that also stays in 3 columns form at different widths:
.flex-row-container {_x000D_
background: #aaa;_x000D_
display: flex;_x000D_
flex-wrap: wrap;_x000D_
align-items: center;_x000D_
justify-content: center;_x000D_
}_x000D_
.flex-row-container > .flex-row-item {_x000D_
flex: 1 1 30%; /*grow | shrink | basis */_x000D_
height: 100px;_x000D_
}_x000D_
_x000D_
.flex-row-item {_x000D_
background-color: #fff4e6;_x000D_
border: 1px solid #f76707;_x000D_
}
_x000D_
<div class="flex-row-container">_x000D_
<div class="flex-row-item">1</div>_x000D_
<div class="flex-row-item">2</div>_x000D_
<div class="flex-row-item">3</div>_x000D_
<div class="flex-row-item">4</div>_x000D_
<div class="flex-row-item">5</div>_x000D_
<div class="flex-row-item">6</div>_x000D_
</div>
_x000D_
Hope this helps someone else.
There's a few ways, the most prominent being getting form data, or getting the query string. Here's one method using JavaScript. When you click on a link it will call the _vals('mytarget', 'theval') which will submit the form data. When your page posts back you can check if this form data has been set and then retrieve it from the form values.
<script language="javascript" type="text/javascript">
function _vals(target, value){
form1.all("target").value=target;
form1.all("value").value=value;
form1.submit();
}
</script>
Alternatively you can get it via the query string. PHP has your _GET and _SET global functions to achieve this making it much easier.
I'm sure there's probably more methods which are better, but these are just a few that spring to mind.
EDIT: Building on this from what others have said using the above method you would have an anchor tag like
<a onclick="_vals('name', 'val')" href="#">My Link</a>
And then in your PHP you can get form data using
$val = $_POST['value'];
So when you click on the link which uses JavaScript it will post form data and when the page posts back from this click you can then retrieve it from the PHP.
You can declare the array in C++ in these type of ways.
If you know the array size then you should declare the array for:
integer: int myArray[array_size];
Double: double myArray[array_size];
Char and string : char myStringArray[array_size];
The difference between char and string is as follows
char myCharArray[6]={'a','b','c','d','e','f'};
char myStringArray[6]="abcdef";
If you don't know the size of array then you should leave the array blank like following.
integer: int myArray[array_size];
Double: double myArray[array_size];
In addition to the above mentioned answers ,recheck your url
Is Perl easily available to you?
$ perl -n -e 'if ($. == 7) { print; exit(0); }'
Obviously substitute whatever number you want for 7.
UPDATE: As a commenter pointed out, the problem I outline below was fixed some time before this post. However, I knew of the HP-SSH project and I asked the author to weigh in. As they explain in the (rightfully) most upvoted answer, encryption is not the source of the problem. Yay for email and people smarter than myself!
Wow, a year-old question with nothing but incorrect answers. However, I must admit that I assumed the slowdown was due to encryption when I asked myself the same question. But ask yourself the next logical question: how quickly can your computer encrypt and decrypt data? If you think that rate is anywhere near the 4.5Mb/second reported by the OP (.5625MBs or roughly half the capacity of a 5.5" floppy disk!) smack yourself a few times, drink some coffee, and ask yourself the same question again.
It apparently has to do with what amounts to be an oversight in the packet size selection, or at least that's what the author of LIBSSH2 says,
The nature of SFTP and its ACK for every small data chunk it sends, makes an initial naive SFTP implementation suffer badly when sending data over high latency networks. If you have to wait a few hundred milliseconds for each 32KB of data then there will never be fast SFTP transfers. This sort of naive implementation is what libssh2 has offered up until and including libssh2 1.2.7.
So the speed hit is due to tiny packet sizes x mandatory ack responses for each packet, which is clearly insane.
The High Performance SSH/SCP (HP-SSH) project provides an OpenSSH patch set which apparently improves the internal buffers as well as parallelizing encryption. Note, however, that even the non-parallelized versions ran at speeds above the 40Mb/s unencrypted speeds obtained by some commenters. The fix involves changing the way in which OpenSSH was calling the encryption libraries, NOT the cipher and there is zero difference in speed between AES128 and AES256. Encryption takes some time, but it is marginal. It might have mattered back in the 90's but (like the speed of Java vs C) it just doesn't matter anymore.
Here is mine:
select:focus option.holder {_x000D_
display: none;_x000D_
}
_x000D_
<select>_x000D_
<option selected="selected" class="holder">Please select</option>_x000D_
<option value="1">Option #1</option>_x000D_
<option value="2">Option #2</option>_x000D_
_x000D_
</select>
_x000D_
A variation of DixonD's excellent answer (above).
public static bool TryOpen(string path,
FileMode fileMode,
FileAccess fileAccess,
FileShare fileShare,
TimeSpan timeout,
out Stream stream)
{
var endTime = DateTime.Now + timeout;
while (DateTime.Now < endTime)
{
if (TryOpen(path, fileMode, fileAccess, fileShare, out stream))
return true;
}
stream = null;
return false;
}
public static bool TryOpen(string path,
FileMode fileMode,
FileAccess fileAccess,
FileShare fileShare,
out Stream stream)
{
try
{
stream = File.Open(path, fileMode, fileAccess, fileShare);
return true;
}
catch (IOException e)
{
if (!FileIsLocked(e))
throw;
stream = null;
return false;
}
}
private const uint HRFileLocked = 0x80070020;
private const uint HRPortionOfFileLocked = 0x80070021;
private static bool FileIsLocked(IOException ioException)
{
var errorCode = (uint)Marshal.GetHRForException(ioException);
return errorCode == HRFileLocked || errorCode == HRPortionOfFileLocked;
}
Usage:
private void Sample(string filePath)
{
Stream stream = null;
try
{
var timeOut = TimeSpan.FromSeconds(1);
if (!TryOpen(filePath,
FileMode.Open,
FileAccess.ReadWrite,
FileShare.ReadWrite,
timeOut,
out stream))
return;
// Use stream...
}
finally
{
if (stream != null)
stream.Close();
}
}
Alter table table_name modify column_name datatype(length) AUTO_INCREMENT PRIMARY KEY
You should add primary key to auto increment, otherwise you got error in mysql.
Type size_t must be big enough to store the size of any possible object. Unsigned int doesn't have to satisfy that condition.
For example in 64 bit systems int and unsigned int may be 32 bit wide, but size_t must be big enough to store numbers bigger than 4G
You can change the default location of .m2 directory in m2.conf file. It resides in your maven installation directory.
add modify this line in
m2.conf
set maven.home C:\Users\me\.m2
use DataTable object instead:
private void doMore(DataTable dt)
{
foreach(DataColumn dc in dt.Columns)
{
MessageBox.Show(dc.ColumnName);
}
}
if you're hosting behind a server, and still facing issues: try changing localhost to 127.0.0.1 e.g. http://localhost:8080/ to http://127.0.0.1:8080/
The issue I was facing was that I was serving a site using apache tomcat within an eclipse IDE (eclipse luna).
For my sanity check I was using Remy Sharp's demo: https://github.com/remy/html5demos/blob/eae156ca2e35efbc648c381222fac20d821df494/demos/geo.html
and was getting the error after making minor tweaks to the error function despite hosting the code on the server (was only working on firefox and failing on chrome and safari):
"User denied Geolocation"
I made the following change to get more detailed error message:
function error(msg) {
var s = document.querySelector('#status');
msg = msg.message ? msg.message : msg; //add this line
s.innerHTML = typeof msg == 'string' ? msg : "failed";
s.className = 'fail';
// console.log(arguments);
}
failing on internet explorer behind virtualbox IE10 on http://10.0.2.2:8080 :
"The current location cannot be determined"
The linefeed character \n
is not the line separator in certain operating systems (such as windows, where it's "\r\n") - my suggestion is that you use \r\n
instead, then it'll both see the line-break with only \n
and \r\n
, I've never had any problems using it.
Also, you should look into using a StringBuilder
instead of concatenating the String
in the while-loop at BookCatalog.toString()
, it is a lot more effective. For instance:
public String toString() {
BookNode current = front;
StringBuilder sb = new StringBuilder();
while (current!=null){
sb.append(current.getData().toString()+"\r\n ");
current = current.getNext();
}
return sb.toString();
}
function groupeByPHP($array,$indexUnique,$assoGroup,$keepInOne){
$retour = array();
$id = $array[0][$indexUnique];
foreach ($keepInOne as $keep){
$retour[$id][$keep] = $array[0][$keep];
}
foreach ($assoGroup as $cle=>$arrayKey){
$arrayGrouped = array();
foreach ($array as $data){
if($data[$indexUnique] != $id){
$id = $data[$indexUnique];
foreach ($keepInOne as $keep){
$retour[$id][$keep] = $data[$keep];
}
}
foreach ($arrayKey as $val){
$arrayGrouped[$val] = $data[$val];
}
$retour[$id][$cle][] = $arrayGrouped;
$retour[$id][$cle] = array_unique($retour[$id][$cle],SORT_REGULAR);
}
}
return $retour;
}
Try this function
groupeByPHP($yourArray,'id',array('desc'=>array('part_no','packaging_type')),array('id','shipping_no'))
CORRELATED SUBQUERIES: Is evaluated for each row processed by the Main query. Execute the Inner query based on the value fetched by the Outer query. Continues till all the values returned by the main query are matched. The INNER Query is driven by the OUTER Query
Ex:
SELECT empno,fname,sal,deptid FROM emp e WHERE sal=(SELECT AVG(sal) FROM emp WHERE deptid=e.deptid)
The Correlated subquery specifically computes the AVG(sal)
for each department.
SUBQUERY: Runs first,executed once,returns values to be used by the MAIN Query. The OUTER Query is driven by the INNER QUERY
If you don't want to use NPOI.Mapper, then I'd advise you to check out this solution - it handles reading excel cell into various type and also has a simple import helper: https://github.com/hidegh/NPOI.Extensions
var data = sheet.MapTo<OrderDetails>(true, rowMapper =>
{
// map singleItem
return new OrderDetails()
{
Date = rowMapper.GetValue<DateTime>(SheetColumnTitles.Date),
// use reusable mapper for re-curring scenarios
Region = regionMapper(rowMapper.GetValue<string>(SheetColumnTitles.Region)),
Representative = rowMapper.GetValue<string>(SheetColumnTitles.Representative),
Item = rowMapper.GetValue<string>(SheetColumnTitles.Item),
Units = rowMapper.GetValue<int>(SheetColumnTitles.Units),
UnitCost = rowMapper.GetValue<decimal>(SheetColumnTitles.UnitCost),
Total = rowMapper.GetValue<decimal>(SheetColumnTitles.Total),
// read date and total as string, as they're displayed/formatted on the excel
DateFormatted = rowMapper.GetValue<string>(SheetColumnTitles.Date),
TotalFormatted = rowMapper.GetValue<string>(SheetColumnTitles.Total)
};
});
from http://htmlhelp.com/reference/wilbur/misc/comment.html
Since HTML is officially an SGML application, the comment syntax used in HTML documents is actually the SGML comment syntax. Unfortunately this syntax is a bit unclear at first.
The definition of an SGML comment is basically as follows:
A comment declaration starts withThis means that the following are all legal SGML comments:<!
, followed by zero or more comments, followed by>
. A comment starts and ends with "--
", and does not contain any occurrence of "--
".Note that an "empty" comment tag, with just "
<!-- Hello -->
<!-- Hello -- -- Hello-->
<!---->
<!------ Hello -->
<!>
--
" characters, should always have a multiple of four "-
" characters to be legal. (And yes,<!>
is also a legal comment - it's the empty comment).Not all HTML parsers get this right. For example, "
<!------> hello-->
" is a legal comment, as you can verify with the rule above. It is a comment tag with two comments; the first is empty and the second one contains "> hello". If you try it in a browser, you will find that the text is displayed on screen.There are two possible reasons for this:
There is also the problem with the "
- The browser sees the ">" character and thinks the comment ends there.
- The browser sees the "
-->
" text and thinks the comment ends there.--
" sequence. Some people have a habit of using things like "<!-------------->
" as separators in their source. Unfortunately, in most cases, the number of "-
" characters is not a multiple of four. This means that a browser who tries to get it right will actually get it wrong here and actually hide the rest of the document.For this reason, use the following simple rule to compose valid and accepted comments:
An HTML comment begins with "<!--
", ends with "-->
" and does not contain "--
" or ">
" anywhere in the comment.
My function takes into account factor, character vector and potential attributes, if you use haven or foreign package to read external files. Also it allows matching different self-defined na.strings. To transform all columns, simply use lappy: df[] = lapply(df, blank2na, na.strings=c('','NA','na','N/A','n/a','NaN','nan'))
See more the comments:
#' Replaces blank-ish elements of a factor or character vector to NA
#' @description Replaces blank-ish elements of a factor or character vector to NA
#' @param x a vector of factor or character or any type
#' @param na.strings case sensitive strings that will be coverted to NA. The function will do a trimws(x,'both') before conversion. If NULL, do only trimws, no conversion to NA.
#' @return Returns a vector trimws (always for factor, character) and NA converted (if matching na.strings). Attributes will also be kept ('label','labels', 'value.labels').
#' @seealso \code{\link{ez.nan2na}}
#' @export
blank2na = function(x,na.strings=c('','.','NA','na','N/A','n/a','NaN','nan')) {
if (is.factor(x)) {
lab = attr(x, 'label', exact = T)
labs1 <- attr(x, 'labels', exact = T)
labs2 <- attr(x, 'value.labels', exact = T)
# trimws will convert factor to character
x = trimws(x,'both')
if (! is.null(lab)) lab = trimws(lab,'both')
if (! is.null(labs1)) labs1 = trimws(labs1,'both')
if (! is.null(labs2)) labs2 = trimws(labs2,'both')
if (!is.null(na.strings)) {
# convert to NA
x[x %in% na.strings] = NA
# also remember to remove na.strings from value labels
labs1 = labs1[! labs1 %in% na.strings]
labs2 = labs2[! labs2 %in% na.strings]
}
# the levels will be reset here
x = factor(x)
if (! is.null(lab)) attr(x, 'label') <- lab
if (! is.null(labs1)) attr(x, 'labels') <- labs1
if (! is.null(labs2)) attr(x, 'value.labels') <- labs2
} else if (is.character(x)) {
lab = attr(x, 'label', exact = T)
labs1 <- attr(x, 'labels', exact = T)
labs2 <- attr(x, 'value.labels', exact = T)
# trimws will convert factor to character
x = trimws(x,'both')
if (! is.null(lab)) lab = trimws(lab,'both')
if (! is.null(labs1)) labs1 = trimws(labs1,'both')
if (! is.null(labs2)) labs2 = trimws(labs2,'both')
if (!is.null(na.strings)) {
# convert to NA
x[x %in% na.strings] = NA
# also remember to remove na.strings from value labels
labs1 = labs1[! labs1 %in% na.strings]
labs2 = labs2[! labs2 %in% na.strings]
}
if (! is.null(lab)) attr(x, 'label') <- lab
if (! is.null(labs1)) attr(x, 'labels') <- labs1
if (! is.null(labs2)) attr(x, 'value.labels') <- labs2
} else {
x = x
}
return(x)
}
Example for a vertical stackview/scrollview (using the EasyPeasy
for autolayout):
let scrollView = UIScrollView()
self.view.addSubview(scrollView)
scrollView <- [
Edges(),
Width().like(self.view)
]
let stackView = UIStackView(arrangedSubviews: yourSubviews)
stackView.axis = .vertical
stackView.distribution = .fill
stackView.spacing = 10
scrollView.addSubview(stackView)
stackView <- [
Edges(),
Width().like(self.view)
]
Just make sure that each of your subview's height is defined!
I had the same issue and I fixed it as below.
npm install --save-dev yarn
npm install --save-dev jest-cli
"jest-coverage": "yarn run jest -- --coverage"
After you write the tests, run the command npm run jest-coverage
. This will create a coverage folder in the root directory. /coverage/icov-report/index.html has the HTML view of the code coverage.
In Swift 4.2
For Delay 1 second after default launch time...
Thread.sleep(forTimeInterval: 1)
For casting varchar fields/values to number format can be little hack used:
SELECT (`PROD_CODE` * 1) AS `PROD_CODE` FROM PRODUCT`
It might not be the best practice, but you can simply target a specific column using collect()
, export it as a list of Rows, and loop through the list.
Assume this is your df:
+----------+----------+-------------------+-----------+-----------+------------------+
| Date| New_Date| New_Timestamp|date_sub_10|date_add_10|time_diff_from_now|
+----------+----------+-------------------+-----------+-----------+------------------+
|2020-09-23|2020-09-23|2020-09-23 00:00:00| 2020-09-13| 2020-10-03| 51148 |
|2020-09-24|2020-09-24|2020-09-24 00:00:00| 2020-09-14| 2020-10-04| -35252 |
|2020-01-25|2020-01-25|2020-01-25 00:00:00| 2020-01-15| 2020-02-04| 20963548 |
|2020-01-11|2020-01-11|2020-01-11 00:00:00| 2020-01-01| 2020-01-21| 22173148 |
+----------+----------+-------------------+-----------+-----------+------------------+
to loop through rows in Date column:
rows = df3.select('Date').collect()
final_list = []
for i in rows:
final_list.append(i[0])
print(final_list)
Here is an elegant way to do it. Create trait that will enable multiple constructors given the number of parameters. You would simply add the number of parameters to the function name "__construct". So one parameter will be "__construct1", two "__construct2"... etc.
trait constructable
{
public function __construct()
{
$a = func_get_args();
$i = func_num_args();
if (method_exists($this,$f='__construct'.$i)) {
call_user_func_array([$this,$f],$a);
}
}
}
class a{
use constructable;
public $result;
public function __construct1($a){
$this->result = $a;
}
public function __construct2($a, $b){
$this->result = $a + $b;
}
}
echo (new a(1))->result; // 1
echo (new a(1,2))->result; // 3
A simpler way is
ggplot(data=df, aes(x=xvar, y=yvar)) +
geom_point()
ggsave(path = path, width = width, height = height, device='tiff', dpi=700)
As of SQL 2014, this can be accomplished via inline index creation:
CREATE TABLE MyTable(
a int NOT NULL
,b smallint NOT NULL
,c smallint NOT NULL
,d smallint NOT NULL
,e smallint NOT NULL
-- This creates a primary key
,CONSTRAINT PK_MyTable PRIMARY KEY CLUSTERED (a)
-- This creates a unique nonclustered index on columns b and c
,CONSTRAINT IX_MyTable1 UNIQUE (b, c)
-- This creates a standard non-clustered index on (d, e)
,INDEX IX_MyTable4 NONCLUSTERED (d, e)
);
GO
Prior to SQL 2014, CREATE/ALTER TABLE only accepted CONSTRAINTs to be added, not indexes. The fact that primary key and unique constraints are implemented in terms of an index is a side effect.
You can get the url like this:
Request.Headers["Referer"]
Explanation
The Request.UrlReferer
will throw a System.UriFormatException
if the referer HTTP header is malformed (which can happen since it is not usually under your control).
As for using Request.ServerVariables
, per MSDN:
Request.ServerVariables Collection
The ServerVariables collection retrieves the values of predetermined environment variables and request header information.
Request.Headers Property
Gets a collection of HTTP headers.
I guess I don't understand why you would prefer the Request.ServerVariables
over Request.Headers
, since Request.ServerVariables
contains all of the environment variables as well as the headers, where Request.Headers is a much shorter list that only contains the headers.
So the best solution is to use the Request.Headers
collection to read the value directly. Do heed Microsoft's warnings about HTML encoding the value if you are going to display it on a form, though.
The difference between HEAD (current branch or last committed state on current branch), index (aka. staging area) and working tree (the state of files in checkout) is described in "The Three States" section of the "1.3 Git Basics" chapter of Pro Git book by Scott Chacon (Creative Commons licensed).
Here is the image illustrating it from this chapter:
In the above image "working directory" is the same as "working tree", the "staging area" is an alternate name for git "index", and HEAD points to currently checked out branch, which tip points to last commit in the "git directory (repository)"
Note that git commit -a
would stage changes and commit in one step.
On my CentOS 6 I have two openssl.cnf :
/openvpn/easy-rsa/
/pki/tls/
I also had the same issue when I tried to install a Windows service, in my case I managed to resolved the issue by removing blank spaces in the folder path to the service .exe, below is the command worked for me in a command prompt
cd C:\Windows\Microsoft.NET\Framework\v4.0.30319
Press ENTER to change working directory
InstallUtil.exe C:\MyService\Release\ReminderService.exe
Press ENTER
The docs indicate that numpy.correlate
is not what you are looking for:
numpy.correlate(a, v, mode='valid', old_behavior=False)[source]
Cross-correlation of two 1-dimensional sequences.
This function computes the correlation as generally defined in signal processing texts:
z[k] = sum_n a[n] * conj(v[n+k])
with a and v sequences being zero-padded where necessary and conj being the conjugate.
Instead, as the other comments suggested, you are looking for a Pearson correlation coefficient. To do this with scipy try:
from scipy.stats.stats import pearsonr
a = [1,4,6]
b = [1,2,3]
print pearsonr(a,b)
This gives
(0.99339926779878274, 0.073186395040328034)
You can also use numpy.corrcoef
:
import numpy
print numpy.corrcoef(a,b)
This gives:
[[ 1. 0.99339927]
[ 0.99339927 1. ]]
Yet another answer (in January 2018) to the old question (in January 2009).
The specification of Java properties file is described in the JavaDoc of java.util.Properties.load(java.io.Reader)
. One problem is that the specification is a bit complicated than the first impression we may have. Another problem is that some answers here arbitrarily added extra specifications - for example, ;
and '
are regarded as starters of comment lines but they should not be. Double/single quotations around property values are removed but they should not be.
The following are points to be considered.
\n
, \r
, \r\n
or the end of the stream.\
.
, \u0020
), tab (\t
, \u0009
) and form feed (\f
, \u000C
).=
is used as the separator between a key and a value.:
is used as the separator between a key and a value, too.#
or !
as its first non-white space characters, meaning leading white spaces before #
or !
are allowed.\
.=
, :
and white spaces can be embedded in a key if they are escaped by backslashes.\r
and \n
escape sequences.\uxxxx
is used to represent a Unicode character.So, for example, if test.properties
has the following content:
# A comment line that starts with '#'.
# This is a comment line having leading white spaces.
! A comment line that starts with '!'.
key1=value1
key2 : value2
key3 value3
key\
4=value\
4
\u006B\u0065\u00795=\u0076\u0061\u006c\u0075\u00655
\k\e\y\6=\v\a\lu\e\6
\:\ \= = \\colon\\space\\equal
it should be interpreted as the following key-value pairs.
+------+--------------------+
| KEY | VALUE |
+------+--------------------+
| key1 | value1 |
| key2 | value2 |
| key3 | value3 |
| key4 | value4 |
| key5 | value5 |
| key6 | value6 |
| : = | \colon\space\equal |
+------+--------------------+
PropertiesLoader
class in Authlete.Authlete NuGet package can interpret the format of the specification. The example code below:
using System;
using System.IO;
using System.Collections.Generic;
using Authlete.Util;
namespace MyApp
{
class Program
{
public static void Main(string[] args)
{
string file = "test.properties";
IDictionary<string, string> properties;
using (TextReader reader = new StreamReader(file))
{
properties = PropertiesLoader.Load(reader);
}
foreach (var entry in properties)
{
Console.WriteLine($"{entry.Key} = {entry.Value}");
}
}
}
}
will generate this output:
key1 = value1
key2 = value2
key3 = value3
key4 = value4
key5 = value5
key6 = value6
: = = \colon\space\equal
An equivalent example in Java is as follows:
import java.util.*;
import java.io.*;
public class Program
{
public static void main(String[] args) throws IOException
{
String file = "test.properties";
Properties properties = new Properties();
try (Reader reader = new FileReader(file))
{
properties.load(reader);
}
for (Map.Entry<Object, Object> entry : properties.entrySet())
{
System.out.format("%s = %s\n", entry.getKey(), entry.getValue());
}
}
}
The source code, PropertiesLoader.cs
, can be found in authlete-csharp. xUnit tests for PropertiesLoader
are written in PropertiesLoaderTest.cs
.
The move
instruction copies a value from one register to another. The li
instruction loads a specific numeric value into that register.
For the specific case of zero, you can use either the constant zero or the zero register to get that:
move $s0, $zero
li $s0, 0
There's no register that generates a value other than zero, though, so you'd have to use li
if you wanted some other number, like:
li $s0, 12345678
Update: User cphyc has kindly created a Github repository for the code in this answer (see here), and bundled the code into a package which may be installed using pip install matplotlib-label-lines
.
Pretty Picture:
In matplotlib
it's pretty easy to label contour plots (either automatically or by manually placing labels with mouse clicks). There does not (yet) appear to be any equivalent capability to label data series in this fashion! There may be some semantic reason for not including this feature which I am missing.
Regardless, I have written the following module which takes any allows for semi-automatic plot labelling. It requires only numpy
and a couple of functions from the standard math
library.
The default behaviour of the labelLines
function is to space the labels evenly along the x
axis (automatically placing at the correct y
-value of course). If you want you can just pass an array of the x co-ordinates of each of the labels. You can even tweak the location of one label (as shown in the bottom right plot) and space the rest evenly if you like.
In addition, the label_lines
function does not account for the lines which have not had a label assigned in the plot
command (or more accurately if the label contains '_line'
).
Keyword arguments passed to labelLines
or labelLine
are passed on to the text
function call (some keyword arguments are set if the calling code chooses not to specify).
1
and 10
annotations in the top left plot. I'm not even sure this can be avoided.y
position instead sometimes.x
-axis values are float
slabelLines
function assumes that all data series span the range specified by the axis limits. Take a look at the blue curve in the top left plot of the pretty picture. If there were only data available for the x
range 0.5
-1
then then we couldn't possibly place a label at the desired location (which is a little less than 0.2
). See this question for a particularly nasty example. Right now, the code does not intelligently identify this scenario and re-arrange the labels, however there is a reasonable workaround. The labelLines function takes the xvals
argument; a list of x
-values specified by the user instead of the default linear distribution across the width. So the user can decide which x
-values to use for the label placement of each data series.Also, I believe this is the first answer to complete the bonus objective of aligning the labels with the curve they're on. :)
label_lines.py:
from math import atan2,degrees
import numpy as np
#Label line with line2D label data
def labelLine(line,x,label=None,align=True,**kwargs):
ax = line.axes
xdata = line.get_xdata()
ydata = line.get_ydata()
if (x < xdata[0]) or (x > xdata[-1]):
print('x label location is outside data range!')
return
#Find corresponding y co-ordinate and angle of the line
ip = 1
for i in range(len(xdata)):
if x < xdata[i]:
ip = i
break
y = ydata[ip-1] + (ydata[ip]-ydata[ip-1])*(x-xdata[ip-1])/(xdata[ip]-xdata[ip-1])
if not label:
label = line.get_label()
if align:
#Compute the slope
dx = xdata[ip] - xdata[ip-1]
dy = ydata[ip] - ydata[ip-1]
ang = degrees(atan2(dy,dx))
#Transform to screen co-ordinates
pt = np.array([x,y]).reshape((1,2))
trans_angle = ax.transData.transform_angles(np.array((ang,)),pt)[0]
else:
trans_angle = 0
#Set a bunch of keyword arguments
if 'color' not in kwargs:
kwargs['color'] = line.get_color()
if ('horizontalalignment' not in kwargs) and ('ha' not in kwargs):
kwargs['ha'] = 'center'
if ('verticalalignment' not in kwargs) and ('va' not in kwargs):
kwargs['va'] = 'center'
if 'backgroundcolor' not in kwargs:
kwargs['backgroundcolor'] = ax.get_facecolor()
if 'clip_on' not in kwargs:
kwargs['clip_on'] = True
if 'zorder' not in kwargs:
kwargs['zorder'] = 2.5
ax.text(x,y,label,rotation=trans_angle,**kwargs)
def labelLines(lines,align=True,xvals=None,**kwargs):
ax = lines[0].axes
labLines = []
labels = []
#Take only the lines which have labels other than the default ones
for line in lines:
label = line.get_label()
if "_line" not in label:
labLines.append(line)
labels.append(label)
if xvals is None:
xmin,xmax = ax.get_xlim()
xvals = np.linspace(xmin,xmax,len(labLines)+2)[1:-1]
for line,x,label in zip(labLines,xvals,labels):
labelLine(line,x,label,align,**kwargs)
Test code to generate the pretty picture above:
from matplotlib import pyplot as plt
from scipy.stats import loglaplace,chi2
from labellines import *
X = np.linspace(0,1,500)
A = [1,2,5,10,20]
funcs = [np.arctan,np.sin,loglaplace(4).pdf,chi2(5).pdf]
plt.subplot(221)
for a in A:
plt.plot(X,np.arctan(a*X),label=str(a))
labelLines(plt.gca().get_lines(),zorder=2.5)
plt.subplot(222)
for a in A:
plt.plot(X,np.sin(a*X),label=str(a))
labelLines(plt.gca().get_lines(),align=False,fontsize=14)
plt.subplot(223)
for a in A:
plt.plot(X,loglaplace(4).pdf(a*X),label=str(a))
xvals = [0.8,0.55,0.22,0.104,0.045]
labelLines(plt.gca().get_lines(),align=False,xvals=xvals,color='k')
plt.subplot(224)
for a in A:
plt.plot(X,chi2(5).pdf(a*X),label=str(a))
lines = plt.gca().get_lines()
l1=lines[-1]
labelLine(l1,0.6,label=r'$Re=${}'.format(l1.get_label()),ha='left',va='bottom',align = False)
labelLines(lines[:-1],align=False)
plt.show()
Example valid nginx.conf for reverse proxy; In case someone is stuck like me.
where 10.x.x.x
is the server where you are running the nginx proxy server and to which you are connecting to with the browser, and 10.y.y.y
is where your real web server is running
events {
worker_connections 4096; ## Default: 1024
}
http {
server {
listen 80;
listen [::]:80;
server_name 10.x.x.x;
location / {
proxy_pass http://10.y.y.y:80/;
proxy_set_header Host $host;
}
}
}
Here is the snippet if you want to do SSL pass through. That is if 10.y.y.y
is running a HTTPS webserver. Here 10.x.x.x
, or where the nignx runs is listening to port 443, and all traffic to 443 is directed to your target web server
events {
worker_connections 4096; ## Default: 1024
}
stream {
server {
listen 443;
proxy_pass 10.y.y.y:443;
}
}
and you can serve it up in docker too
docker run --name nginx-container --rm --net=host -v /home/core/nginx/nginx.conf:/etc/nginx/nginx.conf nginx
public static string NumberToWords(int number)
{
if (number == 0)
return "zero";
if (number < 0)
return "minus " + NumberToWords(Math.Abs(number));
string words = "";
if ((number / 1000000) > 0)
{
words += NumberToWords(number / 1000000) + " million ";
number %= 1000000;
}
if ((number / 1000) > 0)
{
words += NumberToWords(number / 1000) + " thousand ";
number %= 1000;
}
if ((number / 100) > 0)
{
words += NumberToWords(number / 100) + " hundred ";
number %= 100;
}
if (number > 0)
{
if (words != "")
words += "and ";
var unitsMap = new[] { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
var tensMap = new[] { "zero", "ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" };
if (number < 20)
words += unitsMap[number];
else
{
words += tensMap[number / 10];
if ((number % 10) > 0)
words += "-" + unitsMap[number % 10];
}
}
return words;
}
As mentioned in several places, I'm also not able to get the req.session.destroy() function to work correctly.
This is my work around .. seems to do the trick, and still allows req.flash to be used
req.session = {};
If you delete or set req.session = null; , seems then you can't use req.flash
There's no way to guarantee that two functions will execute in sync with each other which seems to be what you want to do.
The best you can do is to split up the function into several steps, then wait for both to finish at critical synchronization points using Process.join
like @aix's answer mentions.
This is better than time.sleep(10)
because you can't guarantee exact timings. With explicitly waiting, you're saying that the functions must be done executing that step before moving to the next, instead of assuming it will be done within 10ms which isn't guaranteed based on what else is going on on the machine.
At first run this command on your terminal.
npm i -g react-native-cli
Then create your react-native project by this command.
React-native init Project name
then move to your project directory by cd command.
For Most of my programs the scripts in this Post did the job. But I had to face a legacy program that I couldn't remove using msiexec.exe or Win32_Product class. (from some reason I got exit 0 but the program was still there)
My solution was to use Win32_Process class:
with the help from nickdnk this command is to get the uninstall exe file path:
64bit:
[array]$unInstallPathReg= gci "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match $programName } | select UninstallString
32bit:
[array]$unInstallPathReg= gci "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" | foreach { gp $_.PSPath } | ? { $_ -match $programName } | select UninstallString
you will have to clean the the result string:
$uninstallPath = $unInstallPathReg[0].UninstallString
$uninstallPath = $uninstallPath -Replace "msiexec.exe","" -Replace "/I","" -Replace "/X",""
$uninstallPath = $uninstallPath .Trim()
now when you have the relevant program uninstall exe file path you can use this command:
$uninstallResult = (Get-WMIObject -List -Verbose | Where-Object {$_.Name -eq "Win32_Process"}).InvokeMethod("Create","$unInstallPath")
$uninstallResult - will have the exit code. 0 is success
the above commands can also run remotely - I did it using invoke command but I believe that adding the argument -computername can work
It helps not to focus on the strong
or weak
part of the discussion. Instead focus on the cycle part.
A retain cycle is a loop that happens when Object A retains Object B, and Object B retains Object A. In that situation, if either object is released:
Thus, those two objects will just hang around in memory for the life of the program even though they should, if everything were working properly, be deallocated.
So, what we're worried about is retain cycles, and there's nothing about blocks in and of themselves that create these cycles. This isn't a problem, for example:
[myArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){
[self doSomethingWithObject:obj];
}];
The block retains self
, but self
doesn't retain the block. If one or the other is released, no cycle is created and everything gets deallocated as it should.
Where you get into trouble is something like:
//In the interface:
@property (strong) void(^myBlock)(id obj, NSUInteger idx, BOOL *stop);
//In the implementation:
[self setMyBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[self doSomethingWithObj:obj];
}];
Now, your object (self
) has an explicit strong
reference to the block. And the block has an implicit strong reference to self
. That's a cycle, and now neither object will be deallocated properly.
Because, in a situation like this, self
by definition already has a strong
reference to the block, it's usually easiest to resolve by making an explicitly weak reference to self
for the block to use:
__weak MyObject *weakSelf = self;
[self setMyBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[weakSelf doSomethingWithObj:obj];
}];
But this should not be the default pattern you follow when dealing with blocks that call self
! This should only be used to break what would otherwise be a retain cycle between self and the block. If you were to adopt this pattern everywhere, you'd run the risk of passing a block to something that got executed after self
was deallocated.
//SUSPICIOUS EXAMPLE:
__weak MyObject *weakSelf = self;
[[SomeOtherObject alloc] initWithCompletion:^{
//By the time this gets called, "weakSelf" might be nil because it's not retained!
[weakSelf doSomething];
}];
You're asking the wrong question here - instead of forcing everything into a vector ask how you can convert test to work with iterators instead of a specific container. You can provide an overload too in order to retain compatibility (and handle other containers at the same time for free):
void test(const std::vector<int>& in) {
// Iterate over vector and do whatever
}
becomes:
template <typename Iterator>
void test(Iterator begin, const Iterator end) {
// Iterate over range and do whatever
}
template <typename Container>
void test(const Container& in) {
test(std::begin(in), std::end(in));
}
Which lets you do:
int x[3]={1, 2, 3};
test(x); // Now correct
isEmptyOrSpaces(str){
return !str || str.trim() === '';
}
Tools as pure JavaScript code for handling Selectbox:
Graphical Understanding:
Image - A
Image - B
Image - C
Updated - 25-June-2019 | Fiddler DEMO
JavaScript Code:
/**
* Empty Select Box
* @param eid Element ID
* @param value text
* @param text text
* @author Neeraj.Singh
*/
function emptySelectBoxById(eid, value, text) {
document.getElementById(eid).innerHTML = "<option value='" + value + "'>" + text + "</option>";
}
/**
* Reset Select Box
* @param eid Element ID
*/
function resetSelectBoxById(eid) {
document.getElementById(eid).options[0].selected = 'selected';
}
/**
* Set Select Box Selection By Index
* @param eid Element ID
* @param eindx Element Index
*/
function setSelectBoxByIndex(eid, eindx) {
document.getElementById(eid).getElementsByTagName('option')[eindx].selected = 'selected';
//or
document.getElementById(eid).options[eindx].selected = 'selected';
}
/**
* Set Select Box Selection By Value
* @param eid Element ID
* @param eval Element Index
*/
function setSelectBoxByValue(eid, eval) {
document.getElementById(eid).value = eval;
}
/**
* Set Select Box Selection By Text
* @param eid Element ID
* @param eval Element Index
*/
function setSelectBoxByText(eid, etxt) {
var eid = document.getElementById(eid);
for (var i = 0; i < eid.options.length; ++i) {
if (eid.options[i].text === etxt)
eid.options[i].selected = true;
}
}
/**
* Get Select Box Text By ID
* @param eid Element ID
* @return string
*/
function getSelectBoxText(eid) {
return document.getElementById(eid).options[document.getElementById(eid).selectedIndex].text;
}
/**
* Get Select Box Value By ID
* @param eid Element ID
* @return string
*/
function getSelectBoxValue(id) {
return document.getElementById(id).options[document.getElementById(id).selectedIndex].value;
}
Take a look at your code :
getUsers(): Observable<User[]> {
return Observable.create(observer => {
this.http.get('http://users.org').map(response => response.json();
})
}
and code from https://angular.io/docs/ts/latest/tutorial/toh-pt6.html (BTW. really good tutorial, you should check it out)
getHeroes(): Promise<Hero[]> {
return this.http.get(this.heroesUrl)
.toPromise()
.then(response => response.json().data as Hero[])
.catch(this.handleError);
}
The HttpService inside Angular2 already returns an observable, sou don't need to wrap another Observable around like you did here:
return Observable.create(observer => {
this.http.get('http://users.org').map(response => response.json()
Try to follow the guide in link that I provided. You should be just fine when you study it carefully.
---EDIT----
First of all WHERE you log the this.users variable? JavaScript isn't working that way. Your variable is undefined and it's fine, becuase of the code execution order!
Try to do it like this:
getUsers(): void {
this.userService.getUsers()
.then(users => {
this.users = users
console.log('this.users=' + this.users);
});
}
See where the console.log(...) is!
Try to resign from toPromise() it's seems to be just for ppl with no RxJs background.
Catch another link: https://scotch.io/tutorials/angular-2-http-requests-with-observables Build your service once again with RxJs observables.
Sample code block for strong password:
(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9])(?=\\S+$).{6,18}
Ah, got it myselfs.
The quirks and quarks of LINQ-2-entities.
This looks most understandable:
var query2 = (
from users in Repo.T_Benutzer
from mappings in Repo.T_Benutzer_Benutzergruppen
.Where(mapping => mapping.BEBG_BE == users.BE_ID).DefaultIfEmpty()
from groups in Repo.T_Benutzergruppen
.Where(gruppe => gruppe.ID == mappings.BEBG_BG).DefaultIfEmpty()
//where users.BE_Name.Contains(keyword)
// //|| mappings.BEBG_BE.Equals(666)
//|| mappings.BEBG_BE == 666
//|| groups.Name.Contains(keyword)
select new
{
UserId = users.BE_ID
,UserName = users.BE_User
,UserGroupId = mappings.BEBG_BG
,GroupName = groups.Name
}
);
var xy = (query2).ToList();
Remove the .DefaultIfEmpty()
, and you get an inner join.
That was what I was looking for.
Use a docstring:
A string literal that occurs as the first statement in a module, function, class, or method definition. Such a docstring becomes the
__doc__
special attribute of that object.All modules should normally have docstrings, and all functions and classes exported by a module should also have docstrings. Public methods (including the
__init__
constructor) should also have docstrings. A package may be documented in the module docstring of the__init__.py
file in the package directory.String literals occurring elsewhere in Python code may also act as documentation. They are not recognized by the Python bytecode compiler and are not accessible as runtime object attributes (i.e. not assigned to
__doc__
), but two types of extra docstrings may be extracted by software tools:
- String literals occurring immediately after a simple assignment at the top level of a module, class, or
__init__
method are called "attribute docstrings".- String literals occurring immediately after another docstring are called "additional docstrings".
Please see PEP 258 , "Docutils Design Specification" [2] , for a detailed description of attribute and additional docstrings...
No need to compile stuff. You can do the same with ssh-keygen
:
ssh-keygen -f pub1key.pub -i
will read the public key in openssl format from pub1key.pub
and output it in OpenSSH format.
Note: In some cases you will need to specify the input format:
ssh-keygen -f pub1key.pub -i -mPKCS8
From the ssh-keygen docs (From man ssh-keygen):
-m key_format Specify a key format for the -i (import) or -e (export) conversion options. The supported key formats are: “RFC4716” (RFC 4716/SSH2 public or private key), “PKCS8” (PEM PKCS8 public key) or “PEM” (PEM public key). The default conversion format is “RFC4716”.
from urllib.request import urlopen, Request
Should solve everything
Simply omitting the attribute or element works well in less formal data.
If you need more sophisticated information, the GML schemas add the attribute nilReason, eg: in GeoSciML:
xsi:nil
with a value of "true" is used to indicate that no value is availablenilReason
may be used to record additional information for missing values; this may be one of the standard GML reasons (missing, inapplicable, withheld, unknown
), or text prepended by other:
, or may be a URI link to a more detailed explanation.When you are exchanging data, the role for which XML is commonly used, data sent to one recipient or for a given purpose may have content obscured that would be available to someone else who paid or had different authentication. Knowing the reason why content was missing can be very important.
Scientists also are concerned with why information is missing. For example, if it was dropped for quality reasons, they may want to see the original bad data.
AtomicInteger
Maybe this is of some worth also: there is a Java class called AtomicInteger
.
This class has some useful methods like addAndGet(int delta)
or incrementAndGet()
(and their counterparts) which allow you to increment/decrement the value of the same instance. Though the class is designed to be used in the context of concurrency, it's also quite useful in other scenarios and probably fits your need.
final AtomicInteger count = new AtomicInteger( 0 ) ;
…
count.incrementAndGet(); // Ignoring the return value.
Please try below code :
public T? GetParsedOrDefaultValue<T>(string valueToParse) where T : struct, IComparable
{
if(string.EmptyOrNull(valueToParse))return null;
try
{
// return parsed value
return (T) Convert.ChangeType(valueToParse, typeof(T));
}
catch(Exception)
{
//default as null value
return null;
}
return null;
}
Double equals ==
will always check based on object identity, regardless of the objects' implementation of hashCode or equals. Of course - make sure the object references you are comparing are volatile
(in a 1.5+ JVM).
If you really must have the original Object toString result (although it's not the best solution for your example use-case), the Commons Lang library has a method ObjectUtils.identityToString(Object) that will do what you want. From the JavaDoc:
public static java.lang.String identityToString(java.lang.Object object)
Gets the toString that would be produced by Object if a class did not override toString itself. null will return null.
ObjectUtils.identityToString(null) = null
ObjectUtils.identityToString("") = "java.lang.String@1e23"
ObjectUtils.identityToString(Boolean.TRUE) = "java.lang.Boolean@7fa"
You need to find what your local network's IP of that computer is. Then other people can access to your site by that IP.
You can find your local network's IP by go to Command Prompt or press Windows + R then type in ipconfig
. It will give out some information and your local IP should look like 192.168.1.x.
Yes Definitely. As far as i remember From kernel version 3.9 (Not sure on the version) onwards support for the SO_REUSEPORT
was introduced. SO_RESUEPORT
allows binding to the exact same port and address, As long as the first server sets this option before binding its socket.
It works for both TCP and UDP. Refer to the link for more details: SO_REUSEPORT
Note: Accepted answer no longer holds true as per my opinion.
I created a custom class MyButton extended from UIButton
. Then added this inside the Identity Inspector
:
After this, change the button type to Custom:
Then you can set attributes like textColor
and UIFont
for your UIButton
for the different states:
Then I also created two methods inside MyButton
class which I have to call inside my code when I want a UIButton
to be displayed as highlighted:
- (void)changeColorAsUnselection{
[self setTitleColor:[UIColor colorFromHexString:acColorGreyDark]
forState:UIControlStateNormal &
UIControlStateSelected &
UIControlStateHighlighted];
}
- (void)changeColorAsSelection{
[self setTitleColor:[UIColor colorFromHexString:acColorYellow]
forState:UIControlStateNormal &
UIControlStateHighlighted &
UIControlStateSelected];
}
You have to set the titleColor
for normal, highlight and selected UIControlState
because there can be more than one state at a time according to the documentation of UIControlState
.
If you don't create these methods, the UIButton
will display selection or highlighting but they won't stay in the UIColor
you setup inside the UIInterface Builder
because they are just available for a short display of a selection, not for displaying selection itself.
This type of the function belongs to element operators. Some useful element operators are defined below.
We use element operators when we need to select a single element from a sequence based on a certain condition. Here is an example.
List<int> items = new List<int>() { 8, 5, 2, 4, 2, 6, 9, 2, 10 };
First() operator returns the first element of a sequence after satisfied the condition. If no element is found then it will throw an exception.
int result = items.Where(item => item == 2).First();
FirstOrDefault() operator returns the first element of a sequence after satisfied the condition. If no element is found then it will return default value of that type.
int result1 = items.Where(item => item == 2).FirstOrDefault();
Assuming that your original dataset is similar to the one you created (i.e. with NA
as character
. You could specify na.strings
while reading the data using read.table
. But, I guess NAs would be detected automatically.
The price
column is factor
which needs to be converted to numeric
class. When you use as.numeric
, all the non-numeric elements (i.e. "NA"
, FALSE) gets coerced to NA
) with a warning.
library(dplyr)
df %>%
mutate(price=as.numeric(as.character(price))) %>%
group_by(company, year, product) %>%
summarise(total.count=n(),
count=sum(is.na(price)),
avg.price=mean(price,na.rm=TRUE),
max.price=max(price, na.rm=TRUE))
I am using the same dataset
(except the ...
row) that was showed.
df = tbl_df(data.frame(company=c("Acme", "Meca", "Emca", "Acme", "Meca","Emca"),
year=c("2011", "2010", "2009", "2011", "2010", "2013"), product=c("Wrench", "Hammer",
"Sonic Screwdriver", "Fairy Dust", "Kindness", "Helping Hand"), price=c("5.67",
"7.12", "12.99", "10.99", "NA",FALSE)))
You can try intersection()
and subtract()
methods from CollectionUtils
.
intersection()
method gives you a collection containing common elements and the subtract()
method gives you all the uncommon ones.
They should also take care of similar elements
In C or C++ local objects are usually allocated on the stack. You are allocating a large array on the stack, more than the stack can handle, so you are getting a stackoverflow.
Don't allocate it local on stack, use some other place instead. This can be achieved by either making the object global or allocating it on the global heap. Global variables are fine, if you don't use the from any other compilation unit. To make sure this doesn't happen by accident, add a static storage specifier, otherwise just use the heap.
This will allocate in the BSS segment, which is a part of the heap:
static int c[1000000];
int main()
{
cout << "done\n";
return 0;
}
This will allocate in the DATA segment, which is a part of the heap too:
int c[1000000] = {};
int main()
{
cout << "done\n";
return 0;
}
This will allocate at some unspecified location in the heap:
int main()
{
int* c = new int[1000000];
cout << "done\n";
return 0;
}
-Contains
is actually a collection operator. It is true if the collection contains the object. It is not limited to strings.
-match
and -imatch
are regular expression string matchers, and set automatic variables to use with captures.
-like
, -ilike
are SQL-like matchers.
Taken from this answer.
packages.config
file. This is the first time I see ignoring a problem actually makes it go away...
Edit in 2020: if you are viewing this warning, consider upgrading to PackageReference if you can
I think a more explicit way of doing this is to use drop.
The syntax is:
df.drop(label)
And as pointed out by @tim and @ChaimG, this can be done in-place:
df.drop(label, inplace=True)
One way of implementing this could be:
df.drop(df.index[:3], inplace=True)
And another "in place" use:
df.drop(df.head(3).index, inplace=True)
simple and easier solution:
select extract(hour from systimestamp) from dual;
EXTRACT(HOURFROMSYSTIMESTAMP)
-----------------------------
16
I've searched config parsing libraries for my project recently and found these libraries:
Not really - the background image is bounded by the element it's applied to, and the overflow properties only apply to the content (i.e. markup) within an element.
You can add another div into your footer div and apply the background image to that, though, and have that overflow instead.
import urllib2
f = urllib2.urlopen(target_url)
for l in f.readlines():
print l
Use this:
SELECT * FROM Table WHERE Column LIKE '%[0-9]%'
By default, a grid item cannot be smaller than the size of its content.
Grid items have an initial size of min-width: auto
and min-height: auto
.
You can override this behavior by setting grid items to min-width: 0
, min-height: 0
or overflow
with any value other than visible
.
From the spec:
6.6. Automatic Minimum Size of Grid Items
To provide a more reasonable default minimum size for grid items, this specification defines that the
auto
value ofmin-width
/min-height
also applies an automatic minimum size in the specified axis to grid items whoseoverflow
isvisible
. (The effect is analogous to the automatic minimum size imposed on flex items.)
Here's a more detailed explanation covering flex items, but it applies to grid items, as well:
This post also covers potential problems with nested containers and known rendering differences among major browsers.
To fix your layout, make these adjustments to your code:
.month-grid {
display: grid;
grid-template: repeat(6, 1fr) / repeat(7, 1fr);
background: #fff;
grid-gap: 2px;
min-height: 0; /* NEW */
min-width: 0; /* NEW; needed for Firefox */
}
.day-item {
padding: 10px;
background: #DFE7E7;
overflow: hidden; /* NEW */
min-width: 0; /* NEW; needed for Firefox */
}
1fr
vs minmax(0, 1fr)
The solution above operates at the grid item level. For a container level solution, see this post:
$('div[id ^= "player_"]');
This worked for me..select all Div starts with "players_" keyword and display it.
To do this using data.table, I found that the following works. Unfortunately, the link does not work anymore, so I used a link for another data set.
library(data.table)
temp <- tempfile()
download.file("https://www.bls.gov/tus/special.requests/atusact_0315.zip", temp)
timeUse <- fread(unzip(temp, files = "atusact_0315.dat"))
rm(temp)
I know this is possible in a single line since you can pass bash scripts to fread
, but I am not sure how to download a .zip file, extract, and pass a single file from that to fread
.
There is one edge case where static has a surprising effect(at least it was to me). The C++03 Standard states in 14.6.4.2/1:
For a function call that depends on a template parameter, if the function name is an unqualified-id but not a template-id, the candidate functions are found using the usual lookup rules (3.4.1, 3.4.2) except that:
- For the part of the lookup using unqualified name lookup (3.4.1), only function declarations with external linkage from the template definition context are found.
- For the part of the lookup using associated namespaces (3.4.2), only function declarations with external linkage found in either the template definition context or the template instantiation context are found.
...
The below code will call foo(void*)
and not foo(S const &)
as you might expect.
template <typename T>
int b1 (T const & t)
{
foo(t);
}
namespace NS
{
namespace
{
struct S
{
public:
operator void * () const;
};
void foo (void*);
static void foo (S const &); // Not considered 14.6.4.2(b1)
}
}
void b2()
{
NS::S s;
b1 (s);
}
In itself this is probably not that big a deal, but it does highlight that for a fully compliant C++ compiler (i.e. one with support for export
) the static
keyword will still have functionality that is not available in any other way.
// bar.h
export template <typename T>
int b1 (T const & t);
// bar.cc
#include "bar.h"
template <typename T>
int b1 (T const & t)
{
foo(t);
}
// foo.cc
#include "bar.h"
namespace NS
{
namespace
{
struct S
{
};
void foo (S const & s); // Will be found by different TU 'bar.cc'
}
}
void b2()
{
NS::S s;
b1 (s);
}
The only way to ensure that the function in our unnamed namespace will not be found in templates using ADL is to make it static
.
Update for Modern C++
As of C++ '11, members of an unnamed namespace have internal linkage implicitly (3.5/4):
An unnamed namespace or a namespace declared directly or indirectly within an unnamed namespace has internal linkage.
But at the same time, 14.6.4.2/1 was updated to remove mention of linkage (this taken from C++ '14):
For a function call where the postfix-expression is a dependent name, the candidate functions are found using the usual lookup rules (3.4.1, 3.4.2) except that:
For the part of the lookup using unqualified name lookup (3.4.1), only function declarations from the template definition context are found.
For the part of the lookup using associated namespaces (3.4.2), only function declarations found in either the template definition context or the template instantiation context are found.
The result is that this particular difference between static and unnamed namespace members no longer exists.
In my case, just using flex-shrink: 0
didn't work. But adding flex-grow: 1
to it worked.
.item {
flex-shrink: 0;
flex-grow: 1;
}
To send json to the server, you first have to create json
function sendData() {
$.ajax({
url: '/helloworld',
type: 'POST',
contentType: 'application/json',
data: JSON.stringify({
name:"Bob",
...
}),
dataType: 'json'
});
}
This is how you would structure the ajax request to send the json as a post var.
function sendData() {
$.ajax({
url: '/helloworld',
type: 'POST',
data: { json: JSON.stringify({
name:"Bob",
...
})},
dataType: 'json'
});
}
The json will now be in the json
post var.
The Oracle JDeveloper 11g built-in viewer is in my view superior to the one available for Eclipse (which, in addition to other unfavourable comparison points I could only get to install for Indigo but not for Juno). If I am not mistaken Oracle makes the JDeveloper available for free (only requires registration at the OTN).
application.properties
logging.level.org.springframework.web.client=DEBUG
application.yml
logging:
level:
root: WARN
org.springframework.web.client: DEBUG
It is reasonable to expect that you cannot do any better than O(N log N) in running time.
However, the interesting part is to investigate whether you can sort it in-place, stably, its worst-case behavior and so on.
Simon Tatham, of Putty fame, explains how to sort a linked list with merge sort. He concludes with the following comments:
Like any self-respecting sort algorithm, this has running time O(N log N). Because this is Mergesort, the worst-case running time is still O(N log N); there are no pathological cases.
Auxiliary storage requirement is small and constant (i.e. a few variables within the sorting routine). Thanks to the inherently different behaviour of linked lists from arrays, this Mergesort implementation avoids the O(N) auxiliary storage cost normally associated with the algorithm.
There is also an example implementation in C that work for both singly and doubly linked lists.
As @Jørgen Fogh mentions below, big-O notation may hide some constant factors that can cause one algorithm to perform better because of memory locality, because of a low number of items, etc.
I combined @glenn jackman's answer and @pcarvalho's answer(in comment list, there is something wrong with pcarvalho's answer because the extra style control function of character '`'(backtick)).
My script can accept path as an augument and sort the directory list as ls -l
, also it can handles the problem of "space in file name".
#!/bin/bash
OLD_IFS="$IFS"
IFS=$'\n'
for dir in $(find $1 -maxdepth 1 -type d | sort);
do
files=("$dir"/*)
printf "%5d,%s\n" "${#files[@]}" "$dir"
done
FS="$OLD_IFS"
My first answer in stackoverflow, and I hope it can help someone ^_^
I haven't tried it but if you put a div in your table cell set so that it will have scrollbars if needed, then you could insert in there, with a fixed height on the div and it should keep your table row to a fixed height.
If you have short strings you should be able to create a few LIKE patterns ('[^a-zA-Z0-9]'
, '[^a-zA-Z0-9][^a-zA-Z0-9]'
, ...) to match strings of different length. Otherwise you should use CLR user defined function and a proper regular expression - Regular Expressions Make Pattern Matching And Data Extraction Easier.
I mean, why not a p/invoke method?
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
public class AppInfo
{
[DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = false)]
private static extern int GetModuleFileName(HandleRef hModule, StringBuilder buffer, int length);
private static HandleRef NullHandleRef = new HandleRef(null, IntPtr.Zero);
public static string StartupPath
{
get
{
StringBuilder stringBuilder = new StringBuilder(260);
GetModuleFileName(NullHandleRef, stringBuilder, stringBuilder.Capacity);
return Path.GetDirectoryName(stringBuilder.ToString());
}
}
}
You would use it just like the Application.StartupPath:
Console.WriteLine("The path to this executable is: " + AppInfo.StartupPath + "\\" + System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe");
Also, you can only have one result set open from each statement. So if you are iterating through two result sets at the same time, make sure they are executed on different statements. Opening a second result set on one statement will implicitly close the first. http://java.sun.com/javase/6/docs/api/java/sql/Statement.html
@Franci Penov - modify is possible in the sense of overwrite with /f
, eg
reg add "HKCU\Software\etc\etc" /f /v "value" /t REG_SZ /d "Yes"
In your viewDidLoad
, register at notification center to listen to this opened from background action
NotificationCenter.default.addObserver(self, selector:#selector(doSomething), name: NSNotification.Name.UIApplicationWillEnterForeground, object: nil)
Then add this function and perform needed action
func doSomething(){
//...
}
Finally add this function to clean up the notification observer when your view controller is destroyed.
deinit {
NotificationCenter.default.removeObserver(self)
}
You can go to your /var/lib/pgsql/data/pg_hba.conf file and add trust in place of Ident It worked for me.
local all all trust
host all 127.0.0.1/32 trust
For further details refer to this issue Ident authentication failed for user
TO_DATE supports conversion to DATE datatype, which doesn't support milliseconds. If you want millisecond support in Oracle, you should look at TIMESTAMP datatype and TO_TIMESTAMP function.
Hope that helps.
Each method of mysqli can fail. You should test each return value. If one fails, think about whether it makes sense to continue with an object that is not in the state you expect it to be. (Potentially not in a "safe" state, but I think that's not an issue here.)
Since only the error message for the last operation is stored per connection/statement you might lose information about what caused the error if you continue after something went wrong. You might want to use that information to let the script decide whether to try again (only a temporary issue), change something or to bail out completely (and report a bug). And it makes debugging a lot easier.
$stmt = $mysqli->prepare("INSERT INTO testtable VALUES (?,?,?)");
// prepare() can fail because of syntax errors, missing privileges, ....
if ( false===$stmt ) {
// and since all the following operations need a valid/ready statement object
// it doesn't make sense to go on
// you might want to use a more sophisticated mechanism than die()
// but's it's only an example
die('prepare() failed: ' . htmlspecialchars($mysqli->error));
}
$rc = $stmt->bind_param('iii', $x, $y, $z);
// bind_param() can fail because the number of parameter doesn't match the placeholders in the statement
// or there's a type conflict(?), or ....
if ( false===$rc ) {
// again execute() is useless if you can't bind the parameters. Bail out somehow.
die('bind_param() failed: ' . htmlspecialchars($stmt->error));
}
$rc = $stmt->execute();
// execute() can fail for various reasons. And may it be as stupid as someone tripping over the network cable
// 2006 "server gone away" is always an option
if ( false===$rc ) {
die('execute() failed: ' . htmlspecialchars($stmt->error));
}
$stmt->close();
The mysqli extension is perfectly capable of reporting operations that result in an (mysqli) error code other than 0 via exceptions, see mysqli_driver::$report_mode.
die() is really, really crude and I wouldn't use it even for examples like this one anymore.
So please, only take away the fact that each and every (mysql) operation can fail for a number of reasons; even if the exact same thing went well a thousand times before....
Using SaSS
change the brand color
$brand-primary:#some-color;
this will change the primary color accross all UI.
Using css-
suppose you want to change button primary color.So
btn.primary{
background:#some-color;
}
search the element and add a new css/sass rule in a new file and attach it after u load the bootstrap css.
This is commonly reported as an error due to using the wrong version of SSMS(Sql Server Management Studio). Use the version designed for your database version. You can use the command select @@version
to check which version of sql server you are actually using. This version is reported in a way that is easier to interpret than that shown in the Help About in SSMS.
Using a newer version of SSMS than your database is generally error-free, i.e. backward compatible.
<li class="list-group-item active"><h5>Feaured Image</h5></li>
<li class="list-group-item">
<div class="input-group mb-3">
<div class="custom-file ">
<input type="file" class="custom-file-input" name="thumbnail" id="thumbnail">
<label class="custom-file-label" for="thumbnail">Choose file</label>
</div>
</div>
<div class="img-thumbnail text-center">
<img src="@if(isset($product)) {{asset('storage/'.$product->thumbnail)}} @else {{asset('images/no-thumbnail.jpeg')}} @endif" id="imgthumbnail" class="img-fluid" alt="">
</div>
</li>
<script>
$(function(){
$('#thumbnail').on('change', function() {
var file = $(this).get(0).files;
var reader = new FileReader();
reader.readAsDataURL(file[0]);
reader.addEventListener("load", function(e) {
var image = e.target.result;
$("#imgthumbnail").attr('src', image);
});
});
}
</script>
use the include is the easiest way as per
http://www.vistax64.com/powershell/168315-get-childitem-filter-files-multiple-extensions.html
Following steps worked for me
I doubt the standard library supports this.
But you can use the google maps utility library:
http://code.google.com/p/google-maps-utility-library-v3/wiki/Libraries#MarkerWithLabel
var myLatlng = new google.maps.LatLng(-25.363882,131.044922);
var myOptions = {
zoom: 8,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'), myOptions);
var marker = new MarkerWithLabel({
position: myLatlng,
map: map,
draggable: true,
raiseOnDrag: true,
labelContent: "A",
labelAnchor: new google.maps.Point(3, 30),
labelClass: "labels", // the CSS class for the label
labelInBackground: false
});
The basics about marker can be found here: https://developers.google.com/maps/documentation/javascript/overlays#Markers
Try this out. After going through a lot of posts and forums, I found this.
mWebView.setDownloadListener(new DownloadListener() {
@Override
public void onDownloadStart(String url, String userAgent,
String contentDisposition, String mimetype,
long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(
Uri.parse(url));
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Name of your downloadble file goes here, example: Mathematics II ");
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
dm.enqueue(request);
Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
Toast.LENGTH_LONG).show();
}
});
Do not forget to give this permission! This is very important! Add this in your Manifest file(The AndroidManifest.xml file)
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- for your file, say a pdf to work -->
Hope this helps. Cheers :)
OSFMount , MagicDisc , Gizmo Director/Gizmo Drive , The Takeaway .
All these work well on .img files
I found a super simple explanation about class << self
, Eigenclass
and different type of methods.
In Ruby, there are three types of methods that can be applied to a class:
Instance methods and class methods are almost similar to their homonymous in other programming languages.
class Foo
def an_instance_method
puts "I am an instance method"
end
def self.a_class_method
puts "I am a class method"
end
end
foo = Foo.new
def foo.a_singleton_method
puts "I am a singletone method"
end
Another way of accessing an Eigenclass
(which includes singleton methods) is with the following syntax (class <<
):
foo = Foo.new
class << foo
def a_singleton_method
puts "I am a singleton method"
end
end
now you can define a singleton method for self
which is the class Foo
itself in this context:
class Foo
class << self
def a_singleton_and_class_method
puts "I am a singleton method for self and a class method for Foo"
end
end
end
If you're using ES5 syntax you may use asapp. For ES6 you may use babel-plugin-module-resolver using a config file like this:
.babelrc
{
"plugins": [
["module-resolver", {
"root": ["./"],
"alias": {
"app": "./app",
"config": "./app/config",
"schema": "./app/db/schemas",
"model": "./app/db/models",
"controller": "./app/http/controllers",
"middleware": "./app/http/middleware",
"route": "./app/http/routes",
"locale": "./app/locales",
"log": "./app/logs",
"library": "./app/utilities/libraries",
"helper": "./app/utilities/helpers",
"view": "./app/views"
}
}]
]
}
Select's default value should be one of its value in the list. In order to load the select with default value you can use ng-options. A scope variable need to be set in the controller and that variable is assigned as ng-model in HTML's select tag.
View this plunker for any references:
let's consider the final output rendered to the user of what we want to achieve: a padded textarea with both a border and a padding, which characteristics are that being clicked they pass the focus to our textarea, and the advantage of an automatic 100% width typical of block elements.
The best approach in my opinion is to use low level solutions as far as possible, to reach the maximum browsers support. In this case the only HTML could work fine, avoiding the use of Javascript (which anyhow we all love).
The LABEL tag comes in our help because has such behaviour and is allowed to contain the input elements it must address to. Its default style is the one of inline elements, so, giving to the label a block display style we can avail ourselves of the automatic 100% width including padding and borders, while the inner textarea has no border, no padding and a 100% width.
Taking a look at the W3C specifics other advantages we may notice are:
See W3C specifics for more detailed information.
Simple example:
.container { _x000D_
width: 400px; _x000D_
border: 3px _x000D_
solid #f7c; _x000D_
}_x000D_
.textareaContainer {_x000D_
display: block;_x000D_
border: 3px solid #38c;_x000D_
padding: 10px;_x000D_
}_x000D_
textarea { _x000D_
width: 100%; _x000D_
margin: 0; _x000D_
padding: 0; _x000D_
border-width: 0; _x000D_
}
_x000D_
<body>_x000D_
<div class="container">_x000D_
I am the container_x000D_
<label class="textareaContainer">_x000D_
<textarea name="text">I am the padded textarea with a styled border...</textarea>_x000D_
</label>_x000D_
</div>_x000D_
</body>
_x000D_
The padding and border of the .textareaContainer elements are the ones we want to give to the textarea. Try editing them to style it as you want. I gave large and visible padding and borders to the .textareaContainer element to let you see their behaviour when clicked.
File file = new File("Foo.txt");
try (PrintStream ps = new PrintStream(file)) {
ps.println("Bar");
}
response.setContentType("application/octet-stream");
response.setContentLength((int) file.length());
response.setHeader( "Content-Disposition",
String.format("attachment; filename=\"%s\"", file.getName()));
OutputStream out = response.getOutputStream();
try (FileInputStream in = new FileInputStream(file)) {
byte[] buffer = new byte[4096];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
}
out.flush();
In 2018,
$('#datepicker').datepicker({
format: "yyyy",
weekStart: 1,
orientation: "bottom",
language: "{{ app.request.locale }}",
keyboardNavigation: false,
viewMode: "years",
minViewMode: "years"
});
Since expression is boolean:
return expression;
public void GetResponseAsync (HttpWebRequest request, Action<HttpWebResponse> gotResponse)
{
if (request != null) {
request.BeginGetRequestStream ((r) => {
try { // there's a try/catch here because execution path is different from invokation one, exception here may cause a crash
HttpWebResponse response = request.EndGetResponse (r);
if (gotResponse != null)
gotResponse (response);
} catch (Exception x) {
Console.WriteLine ("Unable to get response for '" + request.RequestUri + "' Err: " + x);
}
}, null);
}
}
You have to define your exception elsewhere as a new class
public class YourCustomException extends Exception{
//Required inherited methods here
}
Then you can throw and catch YourCustomException as much as you'd like.
SqlDependency doesn't watch the database it watches the SqlCommand you specify so if you are trying to lets say insert values into the database in 1 project and capture that event in another project it won't work because the event was from the SqlCommand from the 1º project not the database because when you create an SqlDependency you link it to a SqlCommand and only when that command from that project is used does it create a Change event.
Redacted version of my article FTP Connection Modes (Active vs. Passive):
FTP connection mode (active or passive), determines how a data connection is established. In both cases, a client creates a TCP control connection to an FTP server command port 21. This is a standard outgoing connection, as with any other file transfer protocol (SFTP, SCP, WebDAV) or any other TCP client application (e.g. web browser). So, usually there are no problems when opening the control connection.
Where FTP protocol is more complicated comparing to the other file transfer protocols are file transfers. While the other protocols use the same connection for both session control and file (data) transfers, the FTP protocol uses a separate connection for the file transfers and directory listings.
In the active mode, the client starts listening on a random port for incoming data connections from the server (the client sends the FTP command PORT
to inform the server on which port it is listening). Nowadays, it is typical that the client is behind a firewall (e.g. built-in Windows firewall) or NAT router (e.g. ADSL modem), unable to accept incoming TCP connections.
For this reason the passive mode was introduced and is mostly used nowadays. Using the passive mode is preferable because most of the complex configuration is done only once on the server side, by experienced administrator, rather than individually on a client side, by (possibly) inexperienced users.
In the passive mode, the client uses the control connection to send a PASV
command to the server and then receives a server IP address and server port number from the server, which the client then uses to open a data connection to the server IP address and server port number received.
With the passive mode, most of the configuration burden is on the server side. The server administrator should setup the server as described below.
The firewall and NAT on the FTP server side have to be configured not only to allow/route the incoming connections on FTP port 21 but also a range of ports for the incoming data connections. Typically, the FTP server software has a configuration option to setup a range of the ports, the server will use. And the same range has to be opened/routed on the firewall/NAT.
When the FTP server is behind a NAT, it needs to know it's external IP address, so it can provide it to the client in a response to PASV
command.
With the active mode, most of the configuration burden is on the client side.
The firewall (e.g. Windows firewall) and NAT (e.g. ADSL modem routing rules) on the client side have to be configured to allow/route a range of ports for the incoming data connections. To open the ports in Windows, go to Control Panel > System and Security > Windows Firewall > Advanced Settings > Inbound Rules > New Rule. For routing the ports on the NAT (if any), refer to its documentation.
When there's NAT in your network, the FTP client needs to know its external IP address that the WinSCP needs to provide to the FTP server using PORT
command. So that the server can correctly connect back to the client to open the data connection. Some FTP clients are capable of autodetecting the external IP address, some have to be manually configured.
Some firewalls/NATs try to automatically open/close data ports by inspecting FTP control connection and/or translate the data connection IP addresses in control connection traffic.
With such a firewall/NAT, the above configuration is not necessary for a plain unencrypted FTP. But this cannot work with FTPS, as the control connection traffic is encrypted and the firewall/NAT cannot inspect nor modify it.
This is Web GUI of a GitHub repository:
Drag and drop your folder to the above area. When you upload too much folder/files, GitHub will notice you:
Yowza, that’s a lot of files. Try again with fewer than 100 files.
and add commit message
And press button Commit changes is the last step.
You can also use the Cookies API and do:
browser.cookies.set({
url: 'example.com',
name: 'HelloWorld',
value: 'HelloWorld',
expirationDate: myDate
}
<! DOCTYPE html>
<html>
<head></head>
<body>
<input type="text" id="subEmail">
<script type="text/javascript">
window.onload = function(){
var subEmail = document.getElementById("subEmail");
subEmail.onchange = function(){
if(subEmail.value == "")
{
subEmail.style.backgroundColor = "red";
}
else
{
subEmail.style.backgroundColor = "yellow";
}
};
};
</script>
</body>
The character encoding of all matching text files gets detected automatically and all matching text files are converted to utf-8
encoding:
$ find . -type f -iname *.txt -exec sh -c 'iconv -f $(file -bi "$1" |sed -e "s/.*[ ]charset=//") -t utf-8 -o converted "$1" && mv converted "$1"' -- {} \;
To perform these steps, a sub shell sh
is used with -exec
, running a one-liner with the -c
flag, and passing the filename as the positional argument "$1"
with -- {}
. In between, the utf-8
output file is temporarily named converted
.
Whereby file -bi
means:
-b
, --brief
Do not prepend filenames to output lines (brief mode).
-i
, --mime
Causes the file command to output mime type strings rather than the more traditional human readable ones. Thus it may say for example text/plain; charset=us-ascii
rather than ASCII text
. The sed
command cuts this to only us-ascii
as is required by iconv
.
The find
command is very useful for such file management automation.
Click here for more find
galore.
You can do it via FileInfo or DirectoryInfo:
DirectoryInfo di = new DirectoryInfo("TempDir");
di.Delete(true);
And then recreate the directory
Here's a version using only the features available in a bare-bones shell (ie it'd work in sh
), and with one less process than using grep
:
if expr "$var" : '[0-9][0-9]*$'>/dev/null; then
echo yes
else
echo no
fi
This checks that the $var
represents only an integer; adjust the regexp to taste, and note that the expr
regexp argument is implicitly anchored at the beginning.
I have the same question but cannot ask it because it would be a duplicate.
The accepted answer, using exit, does not work when the script is a bit more complicated. If you use a background process to check for the condition, exit only exits that process, as it runs in a sub-shell. To kill the script, you have to explicitly kill it (at least that is the only way I know).
Here is a little script on how to do it:
#!/bin/bash
boom() {
while true; do sleep 1.2; echo boom; done
}
f() {
echo Hello
N=0
while
((N++ <10))
do
sleep 1
echo $N
# ((N > 5)) && exit 4 # does not work
((N > 5)) && { kill -9 $$; exit 5; } # works
done
}
boom &
f &
while true; do sleep 0.5; echo beep; done
This is a better answer but still incomplete a I really don't know how to get rid of the boom part.
Here is the code
$str = substr($str, 1);
echo $str;
Output:
this is a applepie :)
String g = "line";
//string to char
char c = g.charAt(0);
char[] c_arr = g.toCharArray();
//char to string
char[] charArray = {'a', 'b', 'c'};
String str = String.valueOf(charArray);
//(or iterate the charArray and append each character to str -> str+=charArray[i])
//or String s= new String(chararray);
This topic is old but if other people like me search a solution, this is a solution that I have found:
Public Function DBStats() As Boolean
On Error GoTo errorHandler
If Not IsNull(myBase.Version) Then
DBStats = True
End If
Exit Function
errorHandler:
DBStats = False
End Function
So "myBase" is a Database Object, I have made a class to access to database (class with insert, update etc...) and on the module the class is use declare in an object (obviously) and I can test the connection with "[the Object].DBStats":
Dim BaseAccess As New myClass
BaseAccess.DBOpen 'I open connection
Debug.Print BaseAccess.DBStats ' I test and that tell me true
BaseAccess.DBClose ' I close the connection
Debug.Print BaseAccess.DBStats ' I test and tell me false
Edit : In DBOpen I use "OpenDatabase" and in DBClose I use ".Close" and "set myBase = nothing" Edit 2: In the function, if you are not connect, .version give you an error so if aren't connect, the errorHandler give you false