How to send an email using PHP?
Full code example..
Try it once..
<?php
// Multiple recipients
$to = '[email protected], [email protected]'; // note the comma
// Subject
$subject = 'Birthday Reminders for August';
// Message
$message = '
<html>
<head>
<title>Birthday Reminders for August</title>
</head>
<body>
<p>Here are the birthdays upcoming in August!</p>
<table>
<tr>
<th>Person</th><th>Day</th><th>Month</th><th>Year</th>
</tr>
<tr>
<td>Johny</td><td>10th</td><td>August</td><td>1970</td>
</tr>
<tr>
<td>Sally</td><td>17th</td><td>August</td><td>1973</td>
</tr>
</table>
</body>
</html>
';
// To send HTML mail, the Content-type header must be set
$headers[] = 'MIME-Version: 1.0';
$headers[] = 'Content-type: text/html; charset=iso-8859-1';
// Additional headers
$headers[] = 'To: Mary <[email protected]>, Kelly <[email protected]>';
$headers[] = 'From: Birthday Reminder <[email protected]>';
$headers[] = 'Cc: [email protected]';
$headers[] = 'Bcc: [email protected]';
// Mail it
mail($to, $subject, $message, implode("\r\n", $headers));
?>
Generate PDF from Swagger API documentation
Checkout https://mrin9.github.io/RapiPdf a custom element with plenty of customization and localization feature.
Disclaimer: I am the author of this package
Cut off text in string after/before separator in powershell
You can use a Split :
$text = "test.txt ; 131 136 80 89 119 17 60 123 210 121 188 42 136 200 131 198"
$separator = ";" # you can put many separator like this "; : ,"
$parts = $text.split($separator)
echo $parts[0] # return test.txt
echo $parts[1] # return the part after the separator
Create an ISO date object in javascript
Try using the ISO string
var isodate = new Date().toISOString()
See also: method definition at MDN.
How do I call a Django function on button click?
There are 2 possible solutions that I personally use
1.without using form
<button type="submit" value={{excel_path}} onclick="location.href='{% url 'downloadexcel' %}'" name='mybtn2'>Download Excel file</button>
2.Using Form
<form action="{% url 'downloadexcel' %}" method="post">
{% csrf_token %}
<button type="submit" name='mybtn2' value={{excel_path}}>Download results in Excel</button>
</form>
Where urls.py should have this
path('excel/',views1.downloadexcel,name="downloadexcel"),
Getting the closest string match
You might be interested in this blog post.
http://seatgeek.com/blog/dev/fuzzywuzzy-fuzzy-string-matching-in-python
Fuzzywuzzy is a Python library that provides easy distance measures such as Levenshtein distance for string matching. It is built on top of difflib in the standard library and will make use of the C implementation Python-levenshtein if available.
Path to MSBuild
There are many correct answers. However, here a One-Liner in PowerShell I use to determine the MSBuild path for the most recent version:
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\MSBuild\ToolsVersions\' |
Get-ItemProperty -Name MSBuildToolsPath |
Sort-Object PSChildName |
Select-Object -ExpandProperty MSBuildToolsPath -first 1
Change window location Jquery
Assuming you want to change the url to another within the same domain, you can use this:
history.pushState('data', '', 'http://www.yourcurrentdomain.com/new/path');
Cannot get to $rootScope
I don't suggest you to use syntax like you did. AngularJs lets you to have different functionalities as you want (run, config, service, factory, etc..), which are more professional.In this function you don't even have to inject that by yourself like
MainCtrl.$inject = ['$scope', '$rootScope', '$location', 'socket', ...];
you can use it, as you know.
Can I use jQuery to check whether at least one checkbox is checked?
$('#fm_submit').submit(function(e){_x000D_
e.preventDefault();_x000D_
var ck_box = $('input[type="checkbox"]:checked').length;_x000D_
_x000D_
// return in firefox or chrome console _x000D_
// the number of checkbox checked_x000D_
console.log(ck_box); _x000D_
_x000D_
if(ck_box > 0){_x000D_
alert(ck_box);_x000D_
} _x000D_
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<form name = "frmTest[]" id="fm_submit">_x000D_
<input type="checkbox" value="true" checked="true" >_x000D_
<input type="checkbox" value="true" checked="true" >_x000D_
<input type="checkbox" >_x000D_
<input type="checkbox" >_x000D_
<input type="submit" id="fm_submit" name="fm_submit" value="Submit">_x000D_
</form>_x000D_
<div class="container"></div>What do <o:p> elements do anyway?
Couldn't find any official documentation (no surprise there) but according to this interesting article, those elements are injected in order to enable Word to convert the HTML back to fully compatible Word document, with everything preserved.
The relevant paragraph:
Microsoft added the special tags to Word's HTML with an eye toward backward compatibility. Microsoft wanted you to be able to save files in HTML complete with all of the tracking, comments, formatting, and other special Word features found in traditional DOC files. If you save a file in HTML and then reload it in Word, theoretically you don't loose anything at all.
This makes lots of sense.
For your specific question.. the o in the <o:p> means "Office namespace" so anything following the o: in a tag means "I'm part of Office namespace" - in case of <o:p> it just means paragraph, the equivalent of the ordinary <p> tag.
I assume that every HTML tag has its Office "equivalent" and they have more.
SQL keys, MUL vs PRI vs UNI
For Mul, this was also helpful documentation to me - http://grokbase.com/t/mysql/mysql/9987k2ew41/key-field-mul-newbie-question
"MUL means that the key allows multiple rows to have the same value. That is, it's not a UNIque key."
For example, let's say you have two models, Post and Comment. Post has a has_many relationship with Comment. It would make sense then for the Comment table to have a MUL key(Post id) because many comments can be attributed to the same Post.
Align div with fixed position on the right side
Just do this. It doesn't affect the horizontal position.
.test {
position: fixed;
left: 0;
right: 0;
}
API pagination best practices
You have several problems.
First, you have the example that you cited.
You also have a similar problem if rows are inserted, but in this case the user get duplicate data (arguably easier to manage than missing data, but still an issue).
If you are not snapshotting the original data set, then this is just a fact of life.
You can have the user make an explicit snapshot:
POST /createquery
filter.firstName=Bob&filter.lastName=Eubanks
Which results:
HTTP/1.1 301 Here's your query
Location: http://www.example.org/query/12345
Then you can page that all day long, since it's now static. This can be reasonably light weight, since you can just capture the actual document keys rather than the entire rows.
If the use case is simply that your users want (and need) all of the data, then you can simply give it to them:
GET /query/12345?all=true
and just send the whole kit.
Why did Servlet.service() for servlet jsp throw this exception?
It can be caused by a classpath contamination. Check that you /WEB-INF/lib doesn't contain something like jsp-api-*.jar.
SVN upgrade working copy
After upgrading to the latest version of Tortoise-SVN I needed to do an "Upgrade" first (as opposed to "Update"!).
Android Studio Rendering Problems : The following classes could not be found
I faced this error when I created second activity in my project in the newly updated Android Studio,I solved it simply by copy pasting the whole xml code from first layout to the second and then I just removed the code that's unnecessary.
How to ensure a <select> form field is submitted when it is disabled?
Just add a line before submit.
$("#XYZ").removeAttr("disabled");
How to debug in Android Studio using adb over WiFi
just open settings / plugins / search " Android wifi adb and download it and connect your mobile using usb cabble once and its done
Error 1022 - Can't write; duplicate key in table
I had this problem when creating a new table. It turns out the Foreign Key name I gave was already in use. Renaming the key fixed it.
Center form submit buttons HTML / CSS
http://jsfiddle.net/SebastianPataneMasuelli/rJxQC/
i just wrapped a div around them and made it align center. then you don't need any css on the buttons to center them.
<div class="buttonHolder">
<input value="Search" title="Search" type="submit" id="btn_s">
<input value="I'm Feeling Lucky" title="I'm Feeling Lucky" name="lucky" type="submit" id="btn_i">
</div>
.buttonHolder{ text-align: center; }
Attempted to read or write protected memory
In my case I had trouble with the "Environment variables" while adding reference to my COM DLL.
When I added the reference to my project, I was looking for P:\Core path, whereas I had added the c:\core path in past into path environment varaible.
So my code was attempting wrong path first. I removed that and un-registered the DLL reference and re-registered my DLL reference using (regsvr32). Hope this helps.
Getting SyntaxError for print with keyword argument end=' '
This is just a version thing. Since Python 3.x the print is actually a function, so it now takes arguments like any normal function.
The end=' ' is just to say that you want a space after the end of the statement instead of a new line character. In Python 2.x you would have to do this by placing a comma at the end of the print statement.
For example, when in a Python 3.x environment:
while i<5:
print(i)
i=i+1
Will give the following output:
0
1
2
3
4
Where as:
while i<5:
print(i, end = ' ')
i=i+1
Will give as output:
0 1 2 3 4
Batch file to restart a service. Windows
net stop <your service> && net start <your service>
No net restart, unfortunately.
batch file to check 64bit or 32bit OS
Here's a nice concise version:
set isX64=False && if /I "%PROCESSOR_ARCHITECTURE%"=="AMD64" ( set isX64=True ) else ( if /I "%PROCESSOR_ARCHITEW6432%"=="AMD64" ( set isX64=True ) )
echo %isX64%
Don't use the "Program Files (x86)" directory as evidence of anything: naughty software can easily create this directory on a 32-bit machine. Instead use the PROCESSOR_ARCHITECTURE and PROCESSOR_ARCHITEW6432 environment variables.
How can I make the computer beep in C#?
In .Net 2.0, you can use Console.Beep().
// Default beep
Console.Beep();
You can also specify the frequency and length of the beep in milliseconds.
// Beep at 5000 Hz for 1 second
Console.Beep(5000, 1000);
For more information refer http://msdn.microsoft.com/en-us/library/8hftfeyw%28v=vs.110%29.aspx
How do I get an animated gif to work in WPF?
I modified Mike Eshva's code,And I made it work better.You can use it with either 1frame jpg png bmp or mutil-frame gif.If you want bind a uri to the control,bind the UriSource properties or you want bind any in-memory stream that you bind the Source propertie which is a BitmapImage.
/// <summary>
/// ??????? ?????????? "???????????", ?????????????? ????????????? GIF.
/// </summary>
public class AnimatedImage : Image
{
static AnimatedImage()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(AnimatedImage), new FrameworkPropertyMetadata(typeof(AnimatedImage)));
}
#region Public properties
/// <summary>
/// ????????/????????????? ????? ???????? ?????.
/// </summary>
public int FrameIndex
{
get { return (int)GetValue(FrameIndexProperty); }
set { SetValue(FrameIndexProperty, value); }
}
/// <summary>
/// Get the BitmapFrame List.
/// </summary>
public List<BitmapFrame> Frames { get; private set; }
/// <summary>
/// Get or set the repeatBehavior of the animation when source is gif formart.This is a dependency object.
/// </summary>
public RepeatBehavior AnimationRepeatBehavior
{
get { return (RepeatBehavior)GetValue(AnimationRepeatBehaviorProperty); }
set { SetValue(AnimationRepeatBehaviorProperty, value); }
}
public new BitmapImage Source
{
get { return (BitmapImage)GetValue(SourceProperty); }
set { SetValue(SourceProperty, value); }
}
public Uri UriSource
{
get { return (Uri)GetValue(UriSourceProperty); }
set { SetValue(UriSourceProperty, value); }
}
#endregion
#region Protected interface
/// <summary>
/// Provides derived classes an opportunity to handle changes to the Source property.
/// </summary>
protected virtual void OnSourceChanged(DependencyPropertyChangedEventArgs e)
{
ClearAnimation();
BitmapImage source;
if (e.NewValue is Uri)
{
source = new BitmapImage();
source.BeginInit();
source.UriSource = e.NewValue as Uri;
source.CacheOption = BitmapCacheOption.OnLoad;
source.EndInit();
}
else if (e.NewValue is BitmapImage)
{
source = e.NewValue as BitmapImage;
}
else
{
return;
}
BitmapDecoder decoder;
if (source.StreamSource != null)
{
decoder = BitmapDecoder.Create(source.StreamSource, BitmapCreateOptions.DelayCreation, BitmapCacheOption.OnLoad);
}
else if (source.UriSource != null)
{
decoder = BitmapDecoder.Create(source.UriSource, BitmapCreateOptions.DelayCreation, BitmapCacheOption.OnLoad);
}
else
{
return;
}
if (decoder.Frames.Count == 1)
{
base.Source = decoder.Frames[0];
return;
}
this.Frames = decoder.Frames.ToList();
PrepareAnimation();
}
#endregion
#region Private properties
private Int32Animation Animation { get; set; }
private bool IsAnimationWorking { get; set; }
#endregion
#region Private methods
private void ClearAnimation()
{
if (Animation != null)
{
BeginAnimation(FrameIndexProperty, null);
}
IsAnimationWorking = false;
Animation = null;
this.Frames = null;
}
private void PrepareAnimation()
{
Animation =
new Int32Animation(
0,
this.Frames.Count - 1,
new Duration(
new TimeSpan(
0,
0,
0,
this.Frames.Count / 10,
(int)((this.Frames.Count / 10.0 - this.Frames.Count / 10) * 1000))))
{
RepeatBehavior = RepeatBehavior.Forever
};
base.Source = this.Frames[0];
BeginAnimation(FrameIndexProperty, Animation);
IsAnimationWorking = true;
}
private static void ChangingFrameIndex
(DependencyObject dp, DependencyPropertyChangedEventArgs e)
{
AnimatedImage animatedImage = dp as AnimatedImage;
if (animatedImage == null || !animatedImage.IsAnimationWorking)
{
return;
}
int frameIndex = (int)e.NewValue;
((Image)animatedImage).Source = animatedImage.Frames[frameIndex];
animatedImage.InvalidateVisual();
}
/// <summary>
/// Handles changes to the Source property.
/// </summary>
private static void OnSourceChanged
(DependencyObject dp, DependencyPropertyChangedEventArgs e)
{
((AnimatedImage)dp).OnSourceChanged(e);
}
#endregion
#region Dependency Properties
/// <summary>
/// FrameIndex Dependency Property
/// </summary>
public static readonly DependencyProperty FrameIndexProperty =
DependencyProperty.Register(
"FrameIndex",
typeof(int),
typeof(AnimatedImage),
new UIPropertyMetadata(0, ChangingFrameIndex));
/// <summary>
/// Source Dependency Property
/// </summary>
public new static readonly DependencyProperty SourceProperty =
DependencyProperty.Register(
"Source",
typeof(BitmapImage),
typeof(AnimatedImage),
new FrameworkPropertyMetadata(
null,
FrameworkPropertyMetadataOptions.AffectsRender |
FrameworkPropertyMetadataOptions.AffectsMeasure,
OnSourceChanged));
/// <summary>
/// AnimationRepeatBehavior Dependency Property
/// </summary>
public static readonly DependencyProperty AnimationRepeatBehaviorProperty =
DependencyProperty.Register(
"AnimationRepeatBehavior",
typeof(RepeatBehavior),
typeof(AnimatedImage),
new PropertyMetadata(null));
public static readonly DependencyProperty UriSourceProperty =
DependencyProperty.Register(
"UriSource",
typeof(Uri),
typeof(AnimatedImage),
new FrameworkPropertyMetadata(
null,
FrameworkPropertyMetadataOptions.AffectsRender |
FrameworkPropertyMetadataOptions.AffectsMeasure,
OnSourceChanged));
#endregion
}
This is a custom control. You need to create it in WPF App Project,and delete the Template override in style.
Put request with simple string as request body
I was having trouble sending plain text and found that I needed to surround the body's value with double quotes:
const request = axios.put(url, "\"" + values.guid + "\"", {
headers: {
"Accept": "application/json",
"Content-type": "application/json",
"Authorization": "Bearer " + sessionStorage.getItem('jwt')
}
})
My webapi server method signature is this:
public IActionResult UpdateModelGuid([FromRoute] string guid, [FromBody] string newGuid)
How can I convert a cv::Mat to a gray scale in OpenCv?
May be helpful for late comers.
#include "stdafx.h"
#include "cv.h"
#include "highgui.h"
using namespace cv;
using namespace std;
int main(int argc, char *argv[])
{
if (argc != 2) {
cout << "Usage: display_Image ImageToLoadandDisplay" << endl;
return -1;
}else{
Mat image;
Mat grayImage;
image = imread(argv[1], IMREAD_COLOR);
if (!image.data) {
cout << "Could not open the image file" << endl;
return -1;
}
else {
int height = image.rows;
int width = image.cols;
cvtColor(image, grayImage, CV_BGR2GRAY);
namedWindow("Display window", WINDOW_AUTOSIZE);
imshow("Display window", image);
namedWindow("Gray Image", WINDOW_AUTOSIZE);
imshow("Gray Image", grayImage);
cvWaitKey(0);
image.release();
grayImage.release();
return 0;
}
}
}
How to check a string for a special character?
Everyone else's method doesn't account for whitespaces. Obviously nobody really considers a whitespace a special character.
Use this method to detect special characters not including whitespaces:
import re
def detect_special_characer(pass_string):
regex= re.compile('[@_!#$%^&*()<>?/\|}{~:]')
if(regex.search(pass_string) == None):
res = False
else:
res = True
return(res)
Cygwin - Makefile-error: recipe for target `main.o' failed
You see the two empty -D entries in the g++ command line? They're causing the problem. You must have values in the -D items e.g. -DWIN32
if you're insistent on using something like -D$(SYSTEM) -D$(ENVIRONMENT) then you can use something like:
SYSTEM ?= generic
ENVIRONMENT ?= generic
in the makefile which gives them default values.
Your output looks to be missing the all important output:
<command-line>:0:1: error: macro names must be identifiers
<command-line>:0:1: error: macro names must be identifiers
just to clarify, what actually got sent to g++ was -D -DWindows_NT, i.e. define a preprocessor macro called -DWindows_NT; which is of course not a valid identifier (similarly for -D -I.)
Why are my CSS3 media queries not working on mobile devices?
The sequential order of css code also matters, for example:
@media(max-width:600px){
.example-text{
color:red;
}
}
.example-text{
color:blue;
}
the above code will not working because the executed order. Need to write as following:
.example-text{
color:blue;
}
@media(max-width:600px){
.example-text{
color:red;
}
}
ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides what about INotifyCollectionChanging?
Here's a modification of the accepted answer to provide more functionality.
RangeCollection.cs:
public class RangeCollection<T> : ObservableCollection<T>
{
#region Members
/// <summary>
/// Occurs when a single item is added.
/// </summary>
public event EventHandler<ItemAddedEventArgs<T>> ItemAdded;
/// <summary>
/// Occurs when a single item is inserted.
/// </summary>
public event EventHandler<ItemInsertedEventArgs<T>> ItemInserted;
/// <summary>
/// Occurs when a single item is removed.
/// </summary>
public event EventHandler<ItemRemovedEventArgs<T>> ItemRemoved;
/// <summary>
/// Occurs when a single item is replaced.
/// </summary>
public event EventHandler<ItemReplacedEventArgs<T>> ItemReplaced;
/// <summary>
/// Occurs when items are added to this.
/// </summary>
public event EventHandler<ItemsAddedEventArgs<T>> ItemsAdded;
/// <summary>
/// Occurs when items are removed from this.
/// </summary>
public event EventHandler<ItemsRemovedEventArgs<T>> ItemsRemoved;
/// <summary>
/// Occurs when items are replaced within this.
/// </summary>
public event EventHandler<ItemsReplacedEventArgs<T>> ItemsReplaced;
/// <summary>
/// Occurs when entire collection is cleared.
/// </summary>
public event EventHandler<ItemsClearedEventArgs<T>> ItemsCleared;
/// <summary>
/// Occurs when entire collection is replaced.
/// </summary>
public event EventHandler<CollectionReplacedEventArgs<T>> CollectionReplaced;
#endregion
#region Helper Methods
/// <summary>
/// Throws exception if any of the specified objects are null.
/// </summary>
private void Check(params T[] Items)
{
foreach (T Item in Items)
{
if (Item == null)
{
throw new ArgumentNullException("Item cannot be null.");
}
}
}
private void Check(IEnumerable<T> Items)
{
if (Items == null) throw new ArgumentNullException("Items cannot be null.");
}
private void Check(IEnumerable<IEnumerable<T>> Items)
{
if (Items == null) throw new ArgumentNullException("Items cannot be null.");
}
private void RaiseChanged(NotifyCollectionChangedAction Action)
{
this.OnPropertyChanged(new PropertyChangedEventArgs("Count"));
this.OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
#endregion
#region Bulk Methods
/// <summary>
/// Adds the elements of the specified collection to the end of this.
/// </summary>
public void AddRange(IEnumerable<T> NewItems)
{
this.Check(NewItems);
foreach (var i in NewItems) this.Items.Add(i);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
this.OnItemsAdded(new ItemsAddedEventArgs<T>(NewItems));
}
/// <summary>
/// Adds variable IEnumerable<T> to this.
/// </summary>
/// <param name="List"></param>
public void AddRange(params IEnumerable<T>[] NewItems)
{
this.Check(NewItems);
foreach (IEnumerable<T> Items in NewItems) foreach (T Item in Items) this.Items.Add(Item);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
//TO-DO: Raise OnItemsAdded with combined IEnumerable<T>.
}
/// <summary>
/// Removes the first occurence of each item in the specified collection.
/// </summary>
public void Remove(IEnumerable<T> OldItems)
{
this.Check(OldItems);
foreach (var i in OldItems) Items.Remove(i);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
OnItemsRemoved(new ItemsRemovedEventArgs<T>(OldItems));
}
/// <summary>
/// Removes all occurences of each item in the specified collection.
/// </summary>
/// <param name="itemsToRemove"></param>
public void RemoveAll(IEnumerable<T> OldItems)
{
this.Check(OldItems);
var set = new HashSet<T>(OldItems);
var list = this as List<T>;
int i = 0;
while (i < this.Count) if (set.Contains(this[i])) this.RemoveAt(i); else i++;
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
OnItemsRemoved(new ItemsRemovedEventArgs<T>(OldItems));
}
/// <summary>
/// Replaces all occurences of a single item with specified item.
/// </summary>
public void ReplaceAll(T Old, T New)
{
this.Check(Old, New);
this.Replace(Old, New, false);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
this.OnItemReplaced(new ItemReplacedEventArgs<T>(Old, New));
}
/// <summary>
/// Clears this and adds specified collection.
/// </summary>
public void ReplaceCollection(IEnumerable<T> NewItems, bool SupressEvent = false)
{
this.Check(NewItems);
IEnumerable<T> OldItems = new List<T>(this.Items);
this.Items.Clear();
foreach (T Item in NewItems) this.Items.Add(Item);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
this.OnReplaced(new CollectionReplacedEventArgs<T>(OldItems, NewItems));
}
private void Replace(T Old, T New, bool BreakFirst)
{
List<T> Cloned = new List<T>(this.Items);
int i = 0;
foreach (T Item in Cloned)
{
if (Item.Equals(Old))
{
this.Items.Remove(Item);
this.Items.Insert(i, New);
if (BreakFirst) break;
}
i++;
}
}
/// <summary>
/// Replaces the first occurence of a single item with specified item.
/// </summary>
public void Replace(T Old, T New)
{
this.Check(Old, New);
this.Replace(Old, New, true);
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
this.OnItemReplaced(new ItemReplacedEventArgs<T>(Old, New));
}
#endregion
#region New Methods
/// <summary>
/// Removes a single item.
/// </summary>
/// <param name="Item"></param>
public new void Remove(T Item)
{
this.Check(Item);
base.Remove(Item);
OnItemRemoved(new ItemRemovedEventArgs<T>(Item));
}
/// <summary>
/// Removes a single item at specified index.
/// </summary>
/// <param name="i"></param>
public new void RemoveAt(int i)
{
T OldItem = this.Items[i]; //This will throw first if null
base.RemoveAt(i);
OnItemRemoved(new ItemRemovedEventArgs<T>(OldItem));
}
/// <summary>
/// Clears this.
/// </summary>
public new void Clear()
{
IEnumerable<T> OldItems = new List<T>(this.Items);
this.Items.Clear();
this.RaiseChanged(NotifyCollectionChangedAction.Reset);
this.OnCleared(new ItemsClearedEventArgs<T>(OldItems));
}
/// <summary>
/// Adds a single item to end of this.
/// </summary>
/// <param name="t"></param>
public new void Add(T Item)
{
this.Check(Item);
base.Add(Item);
this.OnItemAdded(new ItemAddedEventArgs<T>(Item));
}
/// <summary>
/// Inserts a single item at specified index.
/// </summary>
/// <param name="i"></param>
/// <param name="t"></param>
public new void Insert(int i, T Item)
{
this.Check(Item);
base.Insert(i, Item);
this.OnItemInserted(new ItemInsertedEventArgs<T>(Item, i));
}
/// <summary>
/// Returns list of T.ToString().
/// </summary>
/// <returns></returns>
public new IEnumerable<string> ToString()
{
foreach (T Item in this) yield return Item.ToString();
}
#endregion
#region Event Methods
private void OnItemAdded(ItemAddedEventArgs<T> i)
{
if (this.ItemAdded != null) this.ItemAdded(this, new ItemAddedEventArgs<T>(i.NewItem));
}
private void OnItemInserted(ItemInsertedEventArgs<T> i)
{
if (this.ItemInserted != null) this.ItemInserted(this, new ItemInsertedEventArgs<T>(i.NewItem, i.Index));
}
private void OnItemRemoved(ItemRemovedEventArgs<T> i)
{
if (this.ItemRemoved != null) this.ItemRemoved(this, new ItemRemovedEventArgs<T>(i.OldItem));
}
private void OnItemReplaced(ItemReplacedEventArgs<T> i)
{
if (this.ItemReplaced != null) this.ItemReplaced(this, new ItemReplacedEventArgs<T>(i.OldItem, i.NewItem));
}
private void OnItemsAdded(ItemsAddedEventArgs<T> i)
{
if (this.ItemsAdded != null) this.ItemsAdded(this, new ItemsAddedEventArgs<T>(i.NewItems));
}
private void OnItemsRemoved(ItemsRemovedEventArgs<T> i)
{
if (this.ItemsRemoved != null) this.ItemsRemoved(this, new ItemsRemovedEventArgs<T>(i.OldItems));
}
private void OnItemsReplaced(ItemsReplacedEventArgs<T> i)
{
if (this.ItemsReplaced != null) this.ItemsReplaced(this, new ItemsReplacedEventArgs<T>(i.OldItems, i.NewItems));
}
private void OnCleared(ItemsClearedEventArgs<T> i)
{
if (this.ItemsCleared != null) this.ItemsCleared(this, new ItemsClearedEventArgs<T>(i.OldItems));
}
private void OnReplaced(CollectionReplacedEventArgs<T> i)
{
if (this.CollectionReplaced != null) this.CollectionReplaced(this, new CollectionReplacedEventArgs<T>(i.OldItems, i.NewItems));
}
#endregion
#region RangeCollection
/// <summary>
/// Initializes a new instance.
/// </summary>
public RangeCollection() : base() { }
/// <summary>
/// Initializes a new instance from specified enumerable.
/// </summary>
public RangeCollection(IEnumerable<T> Collection) : base(Collection) { }
/// <summary>
/// Initializes a new instance from specified list.
/// </summary>
public RangeCollection(List<T> List) : base(List) { }
/// <summary>
/// Initializes a new instance with variable T.
/// </summary>
public RangeCollection(params T[] Items) : base()
{
this.AddRange(Items);
}
/// <summary>
/// Initializes a new instance with variable enumerable.
/// </summary>
public RangeCollection(params IEnumerable<T>[] Items) : base()
{
this.AddRange(Items);
}
#endregion
}
Events Classes:
public class CollectionReplacedEventArgs<T> : ReplacedEventArgs<T>
{
public CollectionReplacedEventArgs(IEnumerable<T> Old, IEnumerable<T> New) : base(Old, New) { }
}
public class ItemAddedEventArgs<T> : EventArgs
{
public T NewItem;
public ItemAddedEventArgs(T t)
{
this.NewItem = t;
}
}
public class ItemInsertedEventArgs<T> : EventArgs
{
public int Index;
public T NewItem;
public ItemInsertedEventArgs(T t, int i)
{
this.NewItem = t;
this.Index = i;
}
}
public class ItemRemovedEventArgs<T> : EventArgs
{
public T OldItem;
public ItemRemovedEventArgs(T t)
{
this.OldItem = t;
}
}
public class ItemReplacedEventArgs<T> : EventArgs
{
public T OldItem;
public T NewItem;
public ItemReplacedEventArgs(T Old, T New)
{
this.OldItem = Old;
this.NewItem = New;
}
}
public class ItemsAddedEventArgs<T> : EventArgs
{
public IEnumerable<T> NewItems;
public ItemsAddedEventArgs(IEnumerable<T> t)
{
this.NewItems = t;
}
}
public class ItemsClearedEventArgs<T> : RemovedEventArgs<T>
{
public ItemsClearedEventArgs(IEnumerable<T> Old) : base(Old) { }
}
public class ItemsRemovedEventArgs<T> : RemovedEventArgs<T>
{
public ItemsRemovedEventArgs(IEnumerable<T> Old) : base(Old) { }
}
public class ItemsReplacedEventArgs<T> : ReplacedEventArgs<T>
{
public ItemsReplacedEventArgs(IEnumerable<T> Old, IEnumerable<T> New) : base(Old, New) { }
}
public class RemovedEventArgs<T> : EventArgs
{
public IEnumerable<T> OldItems;
public RemovedEventArgs(IEnumerable<T> Old)
{
this.OldItems = Old;
}
}
public class ReplacedEventArgs<T> : EventArgs
{
public IEnumerable<T> OldItems;
public IEnumerable<T> NewItems;
public ReplacedEventArgs(IEnumerable<T> Old, IEnumerable<T> New)
{
this.OldItems = Old;
this.NewItems = New;
}
}
Note: I did not manually raise OnCollectionChanged in the base methods because it appears only to be possible to create a CollectionChangedEventArgs using the Reset action. If you try to raise OnCollectionChanged using Reset for a single item change, your items control will appear to flicker, which is something you want to avoid.
List of IP Space used by Facebook
Updated list as of 6/11/2013
204.15.20.0/22
69.63.176.0/20
66.220.144.0/20
66.220.144.0/21
69.63.184.0/21
69.63.176.0/21
74.119.76.0/22
69.171.255.0/24
173.252.64.0/18
69.171.224.0/19
69.171.224.0/20
103.4.96.0/22
69.63.176.0/24
173.252.64.0/19
173.252.70.0/24
31.13.64.0/18
31.13.24.0/21
66.220.152.0/21
66.220.159.0/24
69.171.239.0/24
69.171.240.0/20
31.13.64.0/19
31.13.64.0/24
31.13.65.0/24
31.13.67.0/24
31.13.68.0/24
31.13.69.0/24
31.13.70.0/24
31.13.71.0/24
31.13.72.0/24
31.13.73.0/24
31.13.74.0/24
31.13.75.0/24
31.13.76.0/24
31.13.77.0/24
31.13.96.0/19
31.13.66.0/24
173.252.96.0/19
69.63.178.0/24
31.13.78.0/24
31.13.79.0/24
31.13.80.0/24
31.13.82.0/24
31.13.83.0/24
31.13.84.0/24
31.13.85.0/24
31.13.87.0/24
31.13.88.0/24
31.13.89.0/24
31.13.90.0/24
31.13.91.0/24
31.13.92.0/24
31.13.93.0/24
31.13.94.0/24
31.13.95.0/24
69.171.253.0/24
69.63.186.0/24
204.15.20.0/22
69.63.176.0/20
69.63.176.0/21
69.63.184.0/21
66.220.144.0/20
69.63.176.0/20
How to find files that match a wildcard string in Java?
Path testPath = Paths.get("C:\");
Stream<Path> stream =
Files.find(testPath, 1,
(path, basicFileAttributes) -> {
File file = path.toFile();
return file.getName().endsWith(".java");
});
// Print all files found
stream.forEach(System.out::println);
How can I scan barcodes on iOS?
There are two major libraries:
ZXing a library written in Java and then ported to Objective C / C++ (QR code only). And an other port to ObjC has been done, by TheLevelUp: ZXingObjC
ZBar an open source software for reading bar codes, C based.
According to my experiments, ZBar is far more accurate and fast than ZXing, at least on iPhone.
Including .cpp files
You should just include header file(s).
If you include header file, header file automatically finds .cpp file. --> This process is done by LINKER.
jQuery show/hide options from one select drop down, when option on other select dropdown is slected
A litle late perhaps but I would suggest
$(document).ready(function() {
var layout_select_html = $('#layout_select').html(); //save original dropdown list
$("#column_select").change(function () {
var cur_column_val = $(this).val(); //save the selected value of the first dropdown
$('#layout_select').html(layout_select_html); //set original dropdown list back
$('#layout_select').children('option').each(function(){ //loop through options
if($(this).val().indexOf(cur_column_val)== -1){ //do your conditional and if it should not be in the dropdown list
$(this).remove(); //remove option from list
}
});
});
break statement in "if else" - java
Because your else isn't attached to anything. The if without braces only encompasses the single statement that immediately follows it.
if (choice==5)
{
System.out.println("End of Game\n Thank you for playing with us!");
break;
}
else
{
System.out.println("Not a valid choice!\n Please try again...\n");
}
Not using braces is generally viewed as a bad practice because it can lead to the exact problems you encountered.
In addition, using a switch here would make more sense.
int choice;
boolean keepGoing = true;
while(keepGoing)
{
System.out.println("---> Your choice: ");
choice = input.nextInt();
switch(choice)
{
case 1:
playGame();
break;
case 2:
loadGame();
break;
// your other cases
// ...
case 5:
System.out.println("End of Game\n Thank you for playing with us!");
keepGoing = false;
break;
default:
System.out.println("Not a valid choice!\n Please try again...\n");
}
}
Note that instead of an infinite for loop I used a while(boolean), making it easy to exit the loop. Another approach would be using break with labels.
What is an MvcHtmlString and when should I use it?
A nice practical use of this is if you want to make your own HtmlHelper extensions. For example, I hate trying to remember the <link> tag syntax, so I've created my own extension method to make a <link> tag:
<Extension()> _
Public Function CssBlock(ByVal html As HtmlHelper, ByVal src As String, ByVal Optional ByVal htmlAttributes As Object = Nothing) As MvcHtmlString
Dim tag = New TagBuilder("link")
tag.MergeAttribute("type", "text/css")
tag.MergeAttribute("rel", "stylesheet")
tag.MergeAttribute("href", src)
tag.MergeAttributes(New RouteValueDictionary(htmlAttributes))
Dim result = tag.ToString(TagRenderMode.Normal)
Return MvcHtmlString.Create(result)
End Function
I could have returned String from this method, but if I had the following would break:
<%: Html.CssBlock(Url.Content("~/sytles/mysite.css")) %>
With MvcHtmlString, using either <%: ... %> or <%= ... %> will both work correctly.
ASP.NET MVC Page Won't Load and says "The resource cannot be found"
For me its solved follow the following steps :
One reason for this occur is if you don't have a start page or wrong start page set under your web project's properties. So do this:
1- Right click on your MVC project
2- Choose "Properties"
3- Select the "Web" tab
4- Select "Specific Page"
Assuming you have a controller called HomeController and an action method called Index, enter "home/index" in to the text box corresponding to the "Specific Page" radio button.
Now, if you launch your web application, it will take you to the view rendered by the HomeController's Index action method.
Refresh a page using JavaScript or HTML
window.location.reload()
should work however there are many different options like:
window.location.href=window.location.href
UIViewController viewDidLoad vs. viewWillAppear: What is the proper division of labor?
viewDidLoad is things you have to do once. viewWillAppear gets called every time the view appears. You should do things that you only have to do once in viewDidLoad - like setting your UILabel texts. However, you may want to modify a specific part of the view every time the user gets to view it, e.g. the iPod application scrolls the lyrics back to the top every time you go to the "Now Playing" view.
However, when you are loading things from a server, you also have to think about latency. If you pack all of your network communication into viewDidLoad or viewWillAppear, they will be executed before the user gets to see the view - possibly resulting a short freeze of your app. It may be good idea to first show the user an unpopulated view with an activity indicator of some sort. When you are done with your networking, which may take a second or two (or may even fail - who knows?), you can populate the view with your data. Good examples on how this could be done can be seen in various twitter clients. For example, when you view the author detail page in Twitterrific, the view only says "Loading..." until the network queries have completed.
String.Replace(char, char) method in C#
As replacing "\n" with "" doesn't give you the result that you want, that means that what you should replace is actually not "\n", but some other character combination.
One possibility is that what you should replace is the "\r\n" character combination, which is the newline code in a Windows system. If you replace only the "\n" (line feed) character it will leave the "\r" (carriage return) character, which still may be interpreted as a line break, depending on how you display the string.
If the source of the string is system specific you should use that specific string, otherwise you should use Environment.NewLine to get the newline character combination for the current system.
string temp = mystring.Replace("\r\n", string.Empty);
or:
string temp = mystring.Replace(Environment.NewLine, string.Empty);
Count how many rows have the same value
Try this Query
select NUM, count(1) as count
from tbl
where num = 1
group by NUM
--having count(1) (You condition)
Reducing the gap between a bullet and text in a list item
This is one way.
li span {
margin-left: -11px;
}
<ul>
<li><span>1</span></li>
<li>2</li>
<li>3</li>
<li>4</li>
</ul>
How do I use Spring Boot to serve static content located in Dropbox folder?
- OS: Win 10
- Spring Boot: 2.1.2
I wanted to serve static content from c:/images
Adding this property worked for me:
spring.resources.static-locations=classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/,file:///C:/images/
I found the original value of the property in the Spring Boot Doc Appendix A
This will make c:/images/image.jpg to be accessible as http://localhost:8080/image.jpg
HTML Form: Select-Option vs Datalist-Option
From a technical point of view they're completely different. <datalist> is an abstract container of options for other elements. In your case you've used it with <input type="text" but you can also use it with ranges, colors, dates etc. http://demo.agektmr.com/datalist/
If using it with text input, as a type of autocomplete, then the question really is: Is it better to use a free-form text input, or a predetermined list of options? In that case I think the answer is a bit more obvious.
If we focus on the use of <datalist> as a list of options for a text field then here are some specific differences between that and a select box:
- A
<datalist>fed text box has a single string for both display label and submit. A select box can have a different submit value vs. display label<option value='ie'>Internet Explorer</option>. - A
<datalist>fed text box does not support the<optgroup>tag to organize the display. - You can not restrict a user to the list of options in a
<datalist>like you can with a<select>. - The onchange event works differently. On a
<select>element, the onchange event is fired immediately upon change, whereas with<input type="text"the event is fired after the element loses focus or the user presses enter. <datalist>has really spotty support across browsers. The way to show all available options is inconsistent, and things only get worse from there.
The last point is really the big one in my opinion. Since you will HAVE to have a more universal autocomplete fallback, then there is almost no reason to go through the trouble of configuring a <datalist>. Plus any decent autocomplete pluging will allow for ways to style the display of your options, which <datalist> does not do. If <datalist> accepted <li> elements that you could manipulate however you want, it would have been really great! But NO.
Also insofar as i can tell, the <datalist> search is an exact match from the beginning of the string. So if you had <option value="internet explorer"> and you searched for 'explorer' you would get no results. Most autocomplete plugins will search anywhere in the text.
I've only used <datalist> as a quick and lazy convenience helper for some internal pages where I know with a 100% certainty that the users have the latest Chrome or Firefox, and will not try to submit bogus values. For any other case, it's hard to recommend the use of <datalist> due to very poor browser support.
Convert datetime value into string
This is super old, but I figured I'd add my 2c. DATE_FORMAT does indeed return a string, but I was looking for the CAST function, in the situation that I already had a datetime string in the database and needed to pattern match against it:
http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html
In this case, you'd use:
CAST(date_value AS char)
This answers a slightly different question, but the question title seems ambiguous enough that this might help someone searching.
How many threads is too many?
As Pax rightly said, measure, don't guess. That what I did for DNSwitness and the results were suprising: the ideal number of threads was much higher than I thought, something like 15,000 threads to get the fastest results.
Of course, it depends on many things, that's why you must measure yourself.
Complete measures (in French only) in Combien de fils d'exécution ?.
Mocking methods of local scope objects with Mockito
If you really want to avoid touching this code, you can use Powermockito (PowerMock for Mockito).
With this, amongst many other things, you can mock the construction of new objects in a very easy way.
Loop through childNodes
If you do a lot of this sort of thing then it might be worth defining the function for yourself.
if (typeof NodeList.prototype.forEach == "undefined"){
NodeList.prototype.forEach = function (cb){
for (var i=0; i < this.length; i++) {
var node = this[i];
cb( node, i );
}
};
}
From Arraylist to Array
ArrayList<String> a = new ArrayList<String>();
a.add( "test" );
@SuppressWarnings( "unused")
Object[] array = a.toArray();
It depends on what you want to achieve if you need to manipulate the array later it would cost more effort than keeping the string in the ArrayList. You have also random access with an ArrayList by list.get( index );
What is meant by Ems? (Android TextView)
em is the typography unit of font width. one em in a 16-point typeface is 16 points
How do you obtain a Drawable object from a resource id in android package?
Following a solution for Kotlin programmers (from API 22)
val res = context?.let { ContextCompat.getDrawable(it, R.id.any_resource }
Filter Java Stream to 1 and only 1 element
Use Guava's MoreCollectors.onlyElement() (JavaDoc).
It does what you want and throws an IllegalArgumentException if the stream consists of two or more elements, and a NoSuchElementException if the stream is empty.
Usage:
import static com.google.common.collect.MoreCollectors.onlyElement;
User match =
users.stream().filter((user) -> user.getId() < 0).collect(onlyElement());
Remove all line breaks from a long string of text
If anybody decides to use replace, you should try r'\n' instead '\n'
mystring = mystring.replace(r'\n', ' ').replace(r'\r', '')
How to combine two strings together in PHP?
No one mentioned this but there is other possibility. I'm using it for huge sql queries. You can use .= operator :)
$string = "the color is ";
$string .= "red";
echo $string; // gives: the color is red
How to check if a std::thread is still running?
If you are willing to make use of C++11 std::async and std::future for running your tasks, then you can utilize the wait_for function of std::future to check if the thread is still running in a neat way like this:
#include <future>
#include <thread>
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono_literals;
/* Run some task on new thread. The launch policy std::launch::async
makes sure that the task is run asynchronously on a new thread. */
auto future = std::async(std::launch::async, [] {
std::this_thread::sleep_for(3s);
return 8;
});
// Use wait_for() with zero milliseconds to check thread status.
auto status = future.wait_for(0ms);
// Print status.
if (status == std::future_status::ready) {
std::cout << "Thread finished" << std::endl;
} else {
std::cout << "Thread still running" << std::endl;
}
auto result = future.get(); // Get result.
}
If you must use std::thread then you can use std::promise to get a future object:
#include <future>
#include <thread>
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono_literals;
// Create a promise and get its future.
std::promise<bool> p;
auto future = p.get_future();
// Run some task on a new thread.
std::thread t([&p] {
std::this_thread::sleep_for(3s);
p.set_value(true); // Is done atomically.
});
// Get thread status using wait_for as before.
auto status = future.wait_for(0ms);
// Print status.
if (status == std::future_status::ready) {
std::cout << "Thread finished" << std::endl;
} else {
std::cout << "Thread still running" << std::endl;
}
t.join(); // Join thread.
}
Both of these examples will output:
Thread still running
This is of course because the thread status is checked before the task is finished.
But then again, it might be simpler to just do it like others have already mentioned:
#include <thread>
#include <atomic>
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono_literals;
std::atomic<bool> done(false); // Use an atomic flag.
/* Run some task on a new thread.
Make sure to set the done flag to true when finished. */
std::thread t([&done] {
std::this_thread::sleep_for(3s);
done = true;
});
// Print status.
if (done) {
std::cout << "Thread finished" << std::endl;
} else {
std::cout << "Thread still running" << std::endl;
}
t.join(); // Join thread.
}
Edit:
There's also the std::packaged_task for use with std::thread for a cleaner solution than using std::promise:
#include <future>
#include <thread>
#include <chrono>
#include <iostream>
int main() {
using namespace std::chrono_literals;
// Create a packaged_task using some task and get its future.
std::packaged_task<void()> task([] {
std::this_thread::sleep_for(3s);
});
auto future = task.get_future();
// Run task on new thread.
std::thread t(std::move(task));
// Get thread status using wait_for as before.
auto status = future.wait_for(0ms);
// Print status.
if (status == std::future_status::ready) {
// ...
}
t.join(); // Join thread.
}
How to change the button color when it is active using bootstrap?
CSS has many pseudo selector like, :active, :hover, :focus, so you can use.
Html
<div class="col-sm-12" id="my_styles">
<button type="submit" class="btn btn-warning" id="1">Button1</button>
<button type="submit" class="btn btn-warning" id="2">Button2</button>
</div>
css
.btn{
background: #ccc;
} .btn:focus{
background: red;
}
How to restrict the selectable date ranges in Bootstrap Datepicker?
The example above can be simplify a bit. Additionally you can put date manually from keyboard instead of selecting it via datepicker only. When clearing the value you need to handle also 'on clearDate' action to remove startDate/endDate boundary:
JS file:
$(".from_date").datepicker({
format: 'yyyy-mm-dd',
autoclose: true,
}).on('changeDate', function (selected) {
var startDate = new Date(selected.date.valueOf());
$('.to_date').datepicker('setStartDate', startDate);
}).on('clearDate', function (selected) {
$('.to_date').datepicker('setStartDate', null);
});
$(".to_date").datepicker({
format: 'yyyy-mm-dd',
autoclose: true,
}).on('changeDate', function (selected) {
var endDate = new Date(selected.date.valueOf());
$('.from_date').datepicker('setEndDate', endDate);
}).on('clearDate', function (selected) {
$('.from_date').datepicker('setEndDate', null);
});
HTML:
<input class="from_date" placeholder="Select start date" type="text" name="from_date">
<input class="to_date" placeholder="Select end date" type="text" name="to_date">
Can't install via pip because of egg_info error
Found out what was wrong. I never installed the setuptools for python, so it was missing some vital files, like the egg ones.
If you find yourself having my issue above, download this file and then in powershell or command prompt, navigate to ez_setup’s directory and execute the command and this will run the file for you:
$ [sudo] python ez_setup.py
If you still need to install pip at this point, run:
$ [sudo] easy_install pip
easy_install was part of the setuptools, and therefore wouldn't work for installing pip.
Then, pip will successfully install django with the command:
$ [sudo] pip install django
Hope I saved someone the headache I gave myself!
~Zorpix
How to change the date format of a DateTimePicker in vb.net
You need to set the Format of the DateTimePicker to Custom and then assign the CustomFormat.
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
DateTimePicker1.Format = DateTimePickerFormat.Custom
DateTimePicker1.CustomFormat = "dd/MM/yyyy"
End Sub
How to install mscomct2.ocx file from .cab file (Excel User Form and VBA)
You're correct that this is really painful to hand out to others, but if you have to, this is how you do it.
- Just extract the .ocx file from the .cab file (it is similar to a zip)
- Copy to the system folder (c:\windows\sysWOW64 for 64 bit systems and c:\windows\system32 for 32 bit)
- Use regsvr32 through the command prompt to register the file (e.g. "regsvr32 c:\windows\sysWOW64\mscomct2.ocx")
References
How to display 3 buttons on the same line in css
Do something like this,
HTML :
<div style="width:500px;">
<button type="submit" class="msgBtn" onClick="return false;" >Save</button>
<button type="submit" class="msgBtn2" onClick="return false;">Publish</button>
<button class="msgBtnBack">Back</button>
</div>
CSS :
div button{
display:inline-block;
}
Or
HTML :
<div style="width:500px;" id="container">
<div><button type="submit" class="msgBtn" onClick="return false;" >Save</button></div>
<div><button type="submit" class="msgBtn2" onClick="return false;">Publish</button></div>
<div><button class="msgBtnBack">Back</button></div>
</div>
CSS :
#container div{
display:inline-block;
width:130px;
}
Bootstrap 3 .img-responsive images are not responsive inside fieldset in FireFox
add condition only firefox in your custom css file.
/* only Firefox */
@-moz-document url-prefix() {
.img-responsive, .thumbnail>img, .thumbnail a>img, .carousel-inner>.item>img, .carousel-inner>.item>a>img {
width: 100%;
}
}
Unsetting array values in a foreach loop
foreach($images as $key=>$image)
{
if($image == 'http://i27.tinypic.com/29ykt1f.gif' ||
$image == 'http://img3.abload.de/img/10nxjl0fhco.gif' ||
$image == 'http://i42.tinypic.com/9pp2tx.gif')
{ unset($images[$key]); }
}
!!foreach($images as $key=>$image
cause $image is the value, so $images[$image] make no sense.
Adding an image to a project in Visual Studio
You need to turn on Show All Files option on solution pane toolbar and include this file manually.
What is the difference between an int and an Integer in Java and C#?
One more thing that I don't see in previous answers: In Java the primitive wrappers classes like Integer, Double, Float, Boolean... and String are suposed to be invariant, so that when you pass an instance of those classes the invoked method couldn't alter your data in any way, in opositión with most of other classes, which internal data could be altered by its public methods. So that this classes only has 'getter' methods, no 'setters', besides the constructor.
In a java program String literals are stored in a separate portion of heap memory, only a instance for literal, to save memory reusing those instances
The name 'model' does not exist in current context in MVC3
I've got the same issue after updating packages. I did the whole stuff You've written above in this topic, but the red underlying of the model keyword has not disappeared. Later, found solution: just deleted 'package' folder from my project's dir and rebuilded, in the meantime allowed NuGet to restore missing packages. Refreshed, and it's done!
Recursively find all files newer than a given time
You can also do this without a marker file.
The %s format to date is seconds since the epoch. find's -mmin flag takes an argument in minutes, so divide the difference in seconds by 60. And the "-" in front of age means find files whose last modification is less than age.
time=1312603983
now=$(date +'%s')
((age = (now - time) / 60))
find . -type f -mmin -$age
With newer versions of gnu find you can use -newermt, which makes it trivial.
How to declare string constants in JavaScript?
So many ways to skin this cat. You can do this in a closure. This code will give you a read-only , namespaced way to have constants. Just declare them in the Public area.
//Namespaced Constants
var MyAppName;
//MyAppName Namespace
(function (MyAppName) {
//MyAppName.Constants Namespace
(function (Constants) {
//Private
function createConstant(name, val) {
Object.defineProperty(MyAppName.Constants, name, {
value: val,
writable: false
});
}
//Public
Constants.FOO = createConstant("FOO", 1);
Constants.FOO2 = createConstant("FOO2", 1);
MyAppName.Constants = Constants;
})(MyAppName.Constants || (MyAppName.Constants = {}));
})(MyAppName || (MyAppName = {}));
Usage:
console.log(MyAppName.Constants.FOO); //prints 1
MyAppName.Constants.FOO = 2;
console.log(MyAppName.Constants.FOO); //does not change - still prints 1
Can I use complex HTML with Twitter Bootstrap's Tooltip?
set "html" option to true if you want to have html into tooltip. Actual html is determined by option "title" (link's title attribute shouldn't be set)
$('#example1').tooltip({placement: 'bottom', title: '<p class="testtooltip">par</p>', html: true});
How to find prime numbers between 0 - 100?
Here is my solution using Sieve of Eratosthenes method:
function gimmePrimes(num) {
numArray = [];
// first generate array of numbers [2,3,...num]
for (i = 2; i <= num; ++i) {
numArray.push(i);
}
for (i = 0; i < numArray.length; ++i) {
//this for loop helps to go through each element of array
for (j = numArray[i]; j < numArray[numArray.length - 1]; ++j) {
//get's the value of i'th element
for (k = 2; j * k <= numArray[numArray.length - 1]; ++k) {
//find the index of multiples of ith element in the array
index = numArray.indexOf(j * k);
if (index > -1) { //remove the multiples
numArray.splice(index, 1);
}
}
}
}
return numArray; //return result
}
gimmePrimes(100);
ReactJS and images in public folder
1- It's good if you use webpack for configurations but you can simply use image path and react will find out that that it's in public directory.
<img src="/image.jpg">
2- If you want to use webpack which is a standard practice in React. You can use these rules in your webpack.config.dev.js file.
module: {
rules: [
{
test: /\.(jpe?g|gif|png|svg)$/i,
use: [
{
loader: 'url-loader',
options: {
limit: 10000
}
}
]
}
],
},
then you can import image file in react components and use it.
import image from '../../public/images/logofooter.png'
<img src={image}/>
Counting words in string
The answer given by @7-isnotbad is extremely close, but doesn't count single-word lines. Here's the fix, which seems to account for every possible combination of words, spaces and newlines.
function countWords(s){
s = s.replace(/\n/g,' '); // newlines to space
s = s.replace(/(^\s*)|(\s*$)/gi,''); // remove spaces from start + end
s = s.replace(/[ ]{2,}/gi,' '); // 2 or more spaces to 1
return s.split(' ').length;
}
How do you convert Html to plain text?
Depends on what you mean by "html." The most complex case would be complete web pages. That's also the easiest to handle, since you can use a text-mode web browser. See the Wikipedia article listing web browsers, including text mode browsers. Lynx is probably the best known, but one of the others may be better for your needs.
Form inside a table
If you want a "editable grid" i.e. a table like structure that allows you to make any of the rows a form, use CSS that mimics the TABLE tag's layout: display:table, display:table-row, and display:table-cell.
There is no need to wrap your whole table in a form and no need to create a separate form and table for each apparent row of your table.
Try this instead:
<style>
DIV.table
{
display:table;
}
FORM.tr, DIV.tr
{
display:table-row;
}
SPAN.td
{
display:table-cell;
}
</style>
...
<div class="table">
<form class="tr" method="post" action="blah.html">
<span class="td"><input type="text"/></span>
<span class="td"><input type="text"/></span>
</form>
<div class="tr">
<span class="td">(cell data)</span>
<span class="td">(cell data)</span>
</div>
...
</div>
The problem with wrapping the whole TABLE in a FORM is that any and all form elements will be sent on submit (maybe that is desired but probably not). This method allows you to define a form for each "row" and send only that row of data on submit.
The problem with wrapping a FORM tag around a TR tag (or TR around a FORM) is that it's invalid HTML. The FORM will still allow submit as usual but at this point the DOM is broken. Note: Try getting the child elements of your FORM or TR with JavaScript, it can lead to unexpected results.
Note that IE7 doesn't support these CSS table styles and IE8 will need a doctype declaration to get it into "standards" mode: (try this one or something equivalent)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Any other browser that supports display:table, display:table-row and display:table-cell should display your css data table the same as it would if you were using the TABLE, TR and TD tags. Most of them do.
Note that you can also mimic THEAD, TBODY, TFOOT by wrapping your row groups in another DIV with display: table-header-group, table-row-group and table-footer-group respectively.
NOTE: The only thing you cannot do with this method is colspan.
Check out this illustration: http://jsfiddle.net/ZRQPP/
How do I install the babel-polyfill library?
Like Babel says in the docs, for Babel > 7.4.0 the module @babel/polyfill is deprecated, so it's recommended to use directly core-js and regenerator-runtime libraries that before were included in @babel/polyfill.
So this worked for me:
npm install --save [email protected]
npm install regenerator-runtime
then add to the very top of your initial js file:
import 'core-js/stable';
import 'regenerator-runtime/runtime';
Get value of div content using jquery
You can get div content using .text() in jquery
var divContent = $('#field-function_purpose').text();
console.log(divContent);
The type is defined in an assembly that is not referenced, how to find the cause?
I have a similar problem, and I remove the RuntimeFrameworkVersion, and the problem was fixed.
Try to remove 1.1.1 or
INNER JOIN same table
Lets try to answer this question, with a good and simple scenario, with 3 MySQL tables i.e. datetable, colortable and jointable.
first see values of table datetable with primary key assigned to column dateid:
mysql> select * from datetable;
+--------+------------+
| dateid | datevalue |
+--------+------------+
| 101 | 2015-01-01 |
| 102 | 2015-05-01 |
| 103 | 2016-01-01 |
+--------+------------+
3 rows in set (0.00 sec)
now move to our second table values colortable with primary key assigned to column colorid:
mysql> select * from colortable;
+---------+------------+
| colorid | colorvalue |
+---------+------------+
| 11 | blue |
| 12 | yellow |
+---------+------------+
2 rows in set (0.00 sec)
and our final third table jointable have no primary keys and values are:
mysql> select * from jointable;
+--------+---------+
| dateid | colorid |
+--------+---------+
| 101 | 11 |
| 102 | 12 |
| 101 | 12 |
+--------+---------+
3 rows in set (0.00 sec)
Now our condition is to find the dateid's, which have both color values blue and yellow.
So, our query is:
mysql> SELECT t1.dateid FROM jointable AS t1 INNER JOIN jointable t2
-> ON t1.dateid = t2.dateid
-> WHERE
-> (t1.colorid IN (SELECT colorid FROM colortable WHERE colorvalue = 'blue'))
-> AND
-> (t2.colorid IN (SELECT colorid FROM colortable WHERE colorvalue = 'yellow'));
+--------+
| dateid |
+--------+
| 101 |
+--------+
1 row in set (0.00 sec)
Hope, this would help many one.
Rotating a Vector in 3D Space
If you want to rotate a vector you should construct what is known as a rotation matrix.
Rotation in 2D
Say you want to rotate a vector or a point by ?, then trigonometry states that the new coordinates are
x' = x cos ? - y sin ?
y' = x sin ? + y cos ?
To demo this, let's take the cardinal axes X and Y; when we rotate the X-axis 90° counter-clockwise, we should end up with the X-axis transformed into Y-axis. Consider
Unit vector along X axis = <1, 0>
x' = 1 cos 90 - 0 sin 90 = 0
y' = 1 sin 90 + 0 cos 90 = 1
New coordinates of the vector, <x', y'> = <0, 1> ? Y-axis
When you understand this, creating a matrix to do this becomes simple. A matrix is just a mathematical tool to perform this in a comfortable, generalized manner so that various transformations like rotation, scale and translation (moving) can be combined and performed in a single step, using one common method. From linear algebra, to rotate a point or vector in 2D, the matrix to be built is
|cos ? -sin ?| |x| = |x cos ? - y sin ?| = |x'|
|sin ? cos ?| |y| |x sin ? + y cos ?| |y'|
Rotation in 3D
That works in 2D, while in 3D we need to take in to account the third axis. Rotating a vector around the origin (a point) in 2D simply means rotating it around the Z-axis (a line) in 3D; since we're rotating around Z-axis, its coordinate should be kept constant i.e. 0° (rotation happens on the XY plane in 3D). In 3D rotating around the Z-axis would be
|cos ? -sin ? 0| |x| |x cos ? - y sin ?| |x'|
|sin ? cos ? 0| |y| = |x sin ? + y cos ?| = |y'|
| 0 0 1| |z| | z | |z'|
around the Y-axis would be
| cos ? 0 sin ?| |x| | x cos ? + z sin ?| |x'|
| 0 1 0| |y| = | y | = |y'|
|-sin ? 0 cos ?| |z| |-x sin ? + z cos ?| |z'|
around the X-axis would be
|1 0 0| |x| | x | |x'|
|0 cos ? -sin ?| |y| = |y cos ? - z sin ?| = |y'|
|0 sin ? cos ?| |z| |y sin ? + z cos ?| |z'|
Note 1: axis around which rotation is done has no sine or cosine elements in the matrix.
Note 2: This method of performing rotations follows the Euler angle rotation system, which is simple to teach and easy to grasp. This works perfectly fine for 2D and for simple 3D cases; but when rotation needs to be performed around all three axes at the same time then Euler angles may not be sufficient due to an inherent deficiency in this system which manifests itself as Gimbal lock. People resort to Quaternions in such situations, which is more advanced than this but doesn't suffer from Gimbal locks when used correctly.
I hope this clarifies basic rotation.
Rotation not Revolution
The aforementioned matrices rotate an object at a distance r = v(x² + y²) from the origin along a circle of radius r; lookup polar coordinates to know why. This rotation will be with respect to the world space origin a.k.a revolution. Usually we need to rotate an object around its own frame/pivot and not around the world's i.e. local origin. This can also be seen as a special case where r = 0. Since not all objects are at the world origin, simply rotating using these matrices will not give the desired result of rotating around the object's own frame. You'd first translate (move) the object to world origin (so that the object's origin would align with the world's, thereby making r = 0), perform the rotation with one (or more) of these matrices and then translate it back again to its previous location. The order in which the transforms are applied matters. Combining multiple transforms together is called concatenation or composition.
Composition
I urge you to read about linear and affine transformations and their composition to perform multiple transformations in one shot, before playing with transformations in code. Without understanding the basic maths behind it, debugging transformations would be a nightmare. I found this lecture video to be a very good resource. Another resource is this tutorial on transformations that aims to be intuitive and illustrates the ideas with animation (caveat: authored by me!).
Rotation around Arbitrary Vector
A product of the aforementioned matrices should be enough if you only need rotations around cardinal axes (X, Y or Z) like in the question posted. However, in many situations you might want to rotate around an arbitrary axis/vector. The Rodrigues' formula (a.k.a. axis-angle formula) is a commonly prescribed solution to this problem. However, resort to it only if you’re stuck with just vectors and matrices. If you're using Quaternions, just build a quaternion with the required vector and angle. Quaternions are a superior alternative for storing and manipulating 3D rotations; it's compact and fast e.g. concatenating two rotations in axis-angle representation is fairly expensive, moderate with matrices but cheap in quaternions. Usually all rotation manipulations are done with quaternions and as the last step converted to matrices when uploading to the rendering pipeline. See Understanding Quaternions for a decent primer on quaternions.
Django: Model Form "object has no attribute 'cleaned_data'"
At times, if we forget the
return self.cleaned_data
in the clean function of django forms, we will not have any data though the form.is_valid() will return True.
Does Git Add have a verbose switch
Well, like (almost) every console program for unix-like systems, git does not tell you anything if a command succeeds. It prints out something only if there's something wrong.
However if you want to be sure of what just happened, just type
git status
and see which changes are going to be committed and which not. I suggest you to use this before every commit, just to be sure that you are not forgetting anything.
Since you seem new to git, here is a link to a free online book that introduces you to git. It's very useful, it writes about basics as well as well known different workflows: http://git-scm.com/book
jQuery Loop through each div
Just as we refer to scrolling class
$( ".scrolling" ).each( function(){
var img = $( "img", this );
$(this).width( img.width() * img.length * 1.2 )
})
How to draw in JPanel? (Swing/graphics Java)
Here is a simple example. I suppose it will be easy to understand:
import java.awt.*;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Graph extends JFrame {
JFrame f = new JFrame();
JPanel jp;
public Graph() {
f.setTitle("Simple Drawing");
f.setSize(300, 300);
f.setDefaultCloseOperation(EXIT_ON_CLOSE);
jp = new GPanel();
f.add(jp);
f.setVisible(true);
}
public static void main(String[] args) {
Graph g1 = new Graph();
g1.setVisible(true);
}
class GPanel extends JPanel {
public GPanel() {
f.setPreferredSize(new Dimension(300, 300));
}
@Override
public void paintComponent(Graphics g) {
//rectangle originates at 10,10 and ends at 240,240
g.drawRect(10, 10, 240, 240);
//filled Rectangle with rounded corners.
g.fillRoundRect(50, 50, 100, 100, 80, 80);
}
}
}
And the output looks like this:
Select the first 10 rows - Laravel Eloquent
Another way to do it is using a limit method:
Listing::limit(10)->get();
This can be useful if you're not trying to implement pagination, but for example, return 10 random rows from a table:
Listing::inRandomOrder()->limit(10)->get();
Sublime Text 2: How to delete blank/empty lines
You are looking for this:
^\n|^\s+$
it will not delete the line, if there is content with white space or tabs in front>
e.g.:
these will not be deleted: ...space... abc
...tab... abc
this will:
...space... ...nothing else...
...tab... ...nothing else...
How to get error information when HttpWebRequest.GetResponse() fails
HttpWebRequest myHttprequest = null;
HttpWebResponse myHttpresponse = null;
myHttpRequest = (HttpWebRequest)WebRequest.Create(URL);
myHttpRequest.Method = "POST";
myHttpRequest.ContentType = "application/x-www-form-urlencoded";
myHttpRequest.ContentLength = urinfo.Length;
StreamWriter writer = new StreamWriter(myHttprequest.GetRequestStream());
writer.Write(urinfo);
writer.Close();
myHttpresponse = (HttpWebResponse)myHttpRequest.GetResponse();
if (myHttpresponse.StatusCode == HttpStatusCode.OK)
{
//Perform necessary action based on response
}
myHttpresponse.Close();
Removing rounded corners from a <select> element in Chrome/Webkit
One way to keep it simple and avoid messing with the arrows and other such features is just to house it in a div with the same background color as the select tag.
PHP not displaying errors even though display_errors = On
For me I solved it by deleting the file of php_errors.txt in the relative folder. Then the file is created automatically again when the code runs next time, and with the errors printed this time.
How to move screen without moving cursor in Vim?
Vim requires the cursor to be in the current screen at all times, however, you could bookmark the current position scroll around and then return to where you were.
mg # This book marks the current position as g (this can be any letter)
<scroll around>
`g # return to g
(Built-in) way in JavaScript to check if a string is a valid number
I recently wrote an article about ways to ensure a variable is a valid number: https://github.com/jehugaleahsa/artifacts/blob/master/2018/typescript_num_hack.md The article explains how to ensure floating point or integer, if that's important (+x vs ~~x).
The article assumes the variable is a string or a number to begin with and trim is available/polyfilled. It wouldn't be hard to extend it to handle other types, as well. Here's the meat of it:
// Check for a valid float
if (x == null
|| ("" + x).trim() === ""
|| isNaN(+x)) {
return false; // not a float
}
// Check for a valid integer
if (x == null
|| ("" + x).trim() === ""
|| ~~x !== +x) {
return false; // not an integer
}
send mail from linux terminal in one line
You can also use sendmail:
/usr/sbin/sendmail [email protected] < /file/to/send
Java random numbers using a seed
You shouldn't be creating a new Random in method scope. Make it a class member:
public class Foo {
private Random random
public Foo() {
this(System.currentTimeMillis());
}
public Foo(long seed) {
this.random = new Random(seed);
}
public synchronized double getNext() {
return generator.nextDouble();
}
}
This is only an example. I don't think wrapping Random this way adds any value. Put it in a class of yours that is using it.
Do checkbox inputs only post data if they're checked?
I resolved the problem with this code:
HTML Form
<input type="checkbox" id="is-business" name="is-business" value="off" onclick="changeValueCheckbox(this)" >
<label for="is-business">Soy empresa</label>
and the javascript function by change the checkbox value form:
//change value of checkbox element
function changeValueCheckbox(element){
if(element.checked){
element.value='on';
}else{
element.value='off';
}
}
and the server checked if the data post is "on" or "off". I used playframework java
final Map<String, String[]> data = request().body().asFormUrlEncoded();
if (data.get("is-business")[0].equals('on')) {
login.setType(new MasterValue(Login.BUSINESS_TYPE));
} else {
login.setType(new MasterValue(Login.USER_TYPE));
}
Declare and initialize a Dictionary in Typescript
Typescript fails in your case because it expects all the fields to be present. Use Record and Partial utility types to solve it.
Record<string, Partial<IPerson>>
interface IPerson {
firstName: string;
lastName: string;
}
var persons: Record<string, Partial<IPerson>> = {
"p1": { firstName: "F1", lastName: "L1" },
"p2": { firstName: "F2" }
};
Explanation.
- Record type creates a dictionary/hashmap.
- Partial type says some of the fields may be missing.
Alternate.
If you wish to make last name optional you can append a ? Typescript will know that it's optional.
lastName?: string;
https://www.typescriptlang.org/docs/handbook/utility-types.html
How do I address unchecked cast warnings?
Wow; I think I figured out the answer to my own question. I'm just not sure it's worth it! :)
The problem is the cast isn't checked. So, you have to check it yourself. You can't just check a parameterized type with instanceof, because the parameterized type information is unavailable at runtime, having been erased at compile time.
But, you can perform a check on each and every item in the hash, with instanceof, and in doing so, you can construct a new hash that is type-safe. And you won't provoke any warnings.
Thanks to mmyers and Esko Luontola, I've parameterized the code I originally wrote here, so it can be wrapped up in a utility class somewhere and used for any parameterized HashMap. If you want to understand it better and aren't very familiar with generics, I encourage viewing the edit history of this answer.
public static <K, V> HashMap<K, V> castHash(HashMap input,
Class<K> keyClass,
Class<V> valueClass) {
HashMap<K, V> output = new HashMap<K, V>();
if (input == null)
return output;
for (Object key: input.keySet().toArray()) {
if ((key == null) || (keyClass.isAssignableFrom(key.getClass()))) {
Object value = input.get(key);
if ((value == null) || (valueClass.isAssignableFrom(value.getClass()))) {
K k = keyClass.cast(key);
V v = valueClass.cast(value);
output.put(k, v);
} else {
throw new AssertionError(
"Cannot cast to HashMap<"+ keyClass.getSimpleName()
+", "+ valueClass.getSimpleName() +">"
+", value "+ value +" is not a "+ valueClass.getSimpleName()
);
}
} else {
throw new AssertionError(
"Cannot cast to HashMap<"+ keyClass.getSimpleName()
+", "+ valueClass.getSimpleName() +">"
+", key "+ key +" is not a " + keyClass.getSimpleName()
);
}
}
return output;
}
That's a lot of work, possibly for very little reward... I'm not sure if I'll use it or not. I'd appreciate any comments as to whether people think it's worth it or not. Also, I'd appreciate improvement suggestions: is there something better I can do besides throw AssertionErrors? Is there something better I could throw? Should I make it a checked Exception?
Setting Short Value Java
In Java, integer literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like L, D, F to specify a long, double, or float, respectively. Note it is common practice to use uppercase letters for better readability.
The Java Language Specification does not provide the same syntactic sugar for byte or short types. Instead, you may declare it as such using explicit casting:
byte foo = (byte)0;
short bar = (short)0;
In your setLongValue(100L) method call, you don't have to necessarily include the L suffix because in this case the int literal is automatically widened to a long. This is called widening primitive conversion in the Java Language Specification.
NameError: name 'reduce' is not defined in Python
In this case I believe that the following is equivalent:
l = sum([1,2,3,4]) % 2
The only problem with this is that it creates big numbers, but maybe that is better than repeated modulo operations?
How do I exit the results of 'git diff' in Git Bash on windows?
None of the above solutions worked for me on Windows 8
But the following command works fine
SHIFT + Q
Regular expression [Any number]
if("123".search(/^\d+$/) >= 0){
// its a number
}
How to search and replace text in a file?
(pip install python-util)
from pyutil import filereplace
filereplace("somefile.txt","abcd","ram")
Will replace all occurences of "abcd" with "ram".
The function also supports regex by specifying regex=True
from pyutil import filereplace
filereplace("somefile.txt","\\w+","ram",regex=True)
Disclaimer: I'm the author (https://github.com/MisterL2/python-util)
Find files with size in Unix
find . -size +10000k -exec ls -sd {} +
If your version of find won't accept the + notation (which acts rather like xargs does), then you might use (GNU find and xargs, so find probably supports + anyway):
find . -size +10000k -print0 | xargs -0 ls -sd
or you might replace the + with \; (and live with the relative inefficiency of this), or you might live with problems caused by spaces in names and use the portable:
find . -size +10000k -print | xargs ls -sd
The -d on the ls commands ensures that if a directory is ever found (unlikely, but...), then the directory information will be printed, not the files in the directory. And, if you're looking for files more than 1 MB (as a now-deleted comment suggested), you need to adjust the +10000k to 1000k or maybe +1024k, or +2048 (for 512-byte blocks, the default unit for -size). This will list the size and then the file name. You could avoid the need for -d by adding -type f to the find command, of course.
Remove empty lines in a text file via grep
Try this: sed -i '/^[ \t]*$/d' file-name
It will delete all blank lines having any no. of white spaces (spaces or tabs) i.e. (0 or more) in the file.
Note: there is a 'space' followed by '\t' inside the square bracket.
The modifier -i will force to write the updated contents back in the file. Without this flag you can see the empty lines got deleted on the screen but the actual file will not be affected.
SELECT with a Replace()
Don't use the alias (P) in your WHERE clause directly.
You can either use the same REPLACE logic again in the WHERE clause:
SELECT Replace(Postcode, ' ', '') AS P
FROM Contacts
WHERE Replace(Postcode, ' ', '') LIKE 'NW101%'
Or use an aliased sub query as described in Nick's answers.
AngularJS ng-if with multiple conditions
HTML code
<div ng-app>
<div ng-controller='ctrl'>
<div ng-class='whatClassIsIt(call.state[0])'>{{call.state[0]}}</div>
<div ng-class='whatClassIsIt(call.state[1])'>{{call.state[1]}}</div>
<div ng-class='whatClassIsIt(call.state[2])'>{{call.state[2]}}</div>
<div ng-class='whatClassIsIt(call.state[3])'>{{call.state[3]}}</div>
<div ng-class='whatClassIsIt(call.state[4])'>{{call.state[4]}}</div>
<div ng-class='whatClassIsIt(call.state[5])'>{{call.state[5]}}</div>
<div ng-class='whatClassIsIt(call.state[6])'>{{call.state[6]}}</div>
<div ng-class='whatClassIsIt(call.state[7])'>{{call.state[7]}}</div>
</div>
JavaScript Code
function ctrl($scope){
$scope.call={state:['second','first','nothing','Never', 'Gonna', 'Give', 'You', 'Up']}
$scope.whatClassIsIt= function(someValue){
if(someValue=="first")
return "ClassA"
else if(someValue=="second")
return "ClassB";
else
return "ClassC";
}
}
Convert an ISO date to the date format yyyy-mm-dd in JavaScript
var d = new Date("Wed Mar 25 2015 05:30:00 GMT+0530 (India Standard Time)");_x000D_
alert(d.toLocaleDateString());How to handle the new window in Selenium WebDriver using Java?
i was having some issues with windowhandle and tried this one. this one works good for me.
String parentWindowHandler = driver.getWindowHandle();
String subWindowHandler = null;
Set<String> handles = driver.getWindowHandles();
Iterator<String> iterator = handles.iterator();
while (iterator.hasNext()){
subWindowHandler = iterator.next();
driver.switchTo().window(subWindowHandler);
System.out.println(subWindowHandler);
}
driver.switchTo().window(parentWindowHandler);
The difference between the 'Local System' account and the 'Network Service' account?
Since there is so much confusion about functionality of standard service accounts, I'll try to give a quick run down.
First the actual accounts:
LocalService account (preferred)
A limited service account that is very similar to Network Service and meant to run standard least-privileged services. However, unlike Network Service it accesses the network as an Anonymous user.
- Name:
NT AUTHORITY\LocalService - the account has no password (any password information you provide is ignored)
- HKCU represents the LocalService user account
- has minimal privileges on the local computer
- presents anonymous credentials on the network
- SID: S-1-5-19
- has its own profile under the HKEY_USERS registry key (
HKEY_USERS\S-1-5-19)
- Name:
-
Limited service account that is meant to run standard privileged services. This account is far more limited than Local System (or even Administrator) but still has the right to access the network as the machine (see caveat above).
NT AUTHORITY\NetworkService- the account has no password (any password information you provide is ignored)
- HKCU represents the NetworkService user account
- has minimal privileges on the local computer
- presents the computer's credentials (e.g.
MANGO$) to remote servers - SID: S-1-5-20
- has its own profile under the HKEY_USERS registry key (
HKEY_USERS\S-1-5-20) - If trying to schedule a task using it, enter
NETWORK SERVICEinto the Select User or Group dialog
LocalSystem account (dangerous, don't use!)
Completely trusted account, more so than the administrator account. There is nothing on a single box that this account cannot do, and it has the right to access the network as the machine (this requires Active Directory and granting the machine account permissions to something)
- Name:
.\LocalSystem(can also useLocalSystemorComputerName\LocalSystem) - the account has no password (any password information you provide is ignored)
- SID: S-1-5-18
- does not have any profile of its own (
HKCUrepresents the default user) - has extensive privileges on the local computer
- presents the computer's credentials (e.g.
MANGO$) to remote servers
- Name:
Above when talking about accessing the network, this refers solely to SPNEGO (Negotiate), NTLM and Kerberos and not to any other authentication mechanism. For example, processing running as LocalService can still access the internet.
The general issue with running as a standard out of the box account is that if you modify any of the default permissions you're expanding the set of things everything running as that account can do. So if you grant DBO to a database, not only can your service running as Local Service or Network Service access that database but everything else running as those accounts can too. If every developer does this the computer will have a service account that has permissions to do practically anything (more specifically the superset of all of the different additional privileges granted to that account).
It is always preferable from a security perspective to run as your own service account that has precisely the permissions you need to do what your service does and nothing else. However, the cost of this approach is setting up your service account, and managing the password. It's a balancing act that each application needs to manage.
In your specific case, the issue that you are probably seeing is that the the DCOM or COM+ activation is limited to a given set of accounts. In Windows XP SP2, Windows Server 2003, and above the Activation permission was restricted significantly. You should use the Component Services MMC snapin to examine your specific COM object and see the activation permissions. If you're not accessing anything on the network as the machine account you should seriously consider using Local Service (not Local System which is basically the operating system).
In Windows Server 2003 you cannot run a scheduled task as
NT_AUTHORITY\LocalService(aka the Local Service account), orNT AUTHORITY\NetworkService(aka the Network Service account).
That capability only was added with Task Scheduler 2.0, which only exists in Windows Vista/Windows Server 2008 and newer.
A service running as NetworkService presents the machine credentials on the network. This means that if your computer was called mango, it would present as the machine account MANGO$:
How to check which locks are held on a table
You can find blocking sql and wait sql by running this:
SELECT
t1.resource_type ,
DB_NAME( resource_database_id) AS dat_name ,
t1.resource_associated_entity_id,
t1.request_mode,
t1.request_session_id,
t2.wait_duration_ms,
( SELECT TEXT FROM sys.dm_exec_requests r CROSS apply sys.dm_exec_sql_text ( r.sql_handle ) WHERE r.session_id = t1.request_session_id ) AS wait_sql,
t2.blocking_session_id,
( SELECT TEXT FROM sys.sysprocesses p CROSS apply sys.dm_exec_sql_text ( p.sql_handle ) WHERE p.spid = t2.blocking_session_id ) AS blocking_sql
FROM
sys.dm_tran_locks t1,
sys.dm_os_waiting_tasks t2
WHERE
t1.lock_owner_address = t2.resource_address
Set initially selected item in Select list in Angular2
You can achieve the same using
<select [ngModel]="object">
<option *ngFor="let object of objects;let i= index;" [value]="object.value" selected="i==0">{{object.name}}</option>
</select>
Convert Json string to Json object in Swift 4
Using JSONSerialization always felt unSwifty and unwieldy, but it is even more so with the arrival of Codable in Swift 4. If you wield a [String:Any] in front of a simple struct it will ... hurt. Check out this in a Playground:
import Cocoa
let data = "[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]".data(using: .utf8)!
struct Form: Codable {
let id: Int
let name: String
let description: String?
private enum CodingKeys: String, CodingKey {
case id = "form_id"
case name = "form_name"
case description = "form_desc"
}
}
do {
let f = try JSONDecoder().decode([Form].self, from: data)
print(f)
print(f[0])
} catch {
print(error)
}
With minimal effort handling this will feel a whole lot more comfortable. And you are given a lot more information if your JSON does not parse properly.
How to get file size in Java
Use the length() method in the File class. From the javadocs:
Returns the length of the file denoted by this abstract pathname. The return value is unspecified if this pathname denotes a directory.
UPDATED Nowadays we should use the Files.size() method:
Paths path = Paths.get("/path/to/file");
long size = Files.size(path);
For the second part of the question, straight from File's javadocs:
getUsableSpace()Returns the number of bytes available to this virtual machine on the partition named by this abstract pathnamegetTotalSpace()Returns the size of the partition named by this abstract pathnamegetFreeSpace()Returns the number of unallocated bytes in the partition named by this abstract path name
Git - How to close commit editor?
Not sure the key combination that gets you there to the > prompt but it is not a bash prompt that I know. I usually get it by accident. Ctrl+C (or D) gets me back to the $ prompt.
MySQL: View with Subquery in the FROM Clause Limitation
It appears to be a known issue.
http://dev.mysql.com/doc/refman/5.1/en/unnamed-views.html
http://bugs.mysql.com/bug.php?id=16757
Many IN queries can be re-written as (left outer) joins and an IS (NOT) NULL of some sort. for example
SELECT * FROM FOO WHERE ID IN (SELECT ID FROM FOO2)
can be re-written as
SELECT FOO.* FROM FOO JOIN FOO2 ON FOO.ID=FOO2.ID
or
SELECT * FROM FOO WHERE ID NOT IN (SELECT ID FROM FOO2)
can be
SELECT FOO.* FROM FOO
LEFT OUTER JOIN FOO2
ON FOO.ID=FOO2.ID WHERE FOO.ID IS NULL
Can I write into the console in a unit test? If yes, why doesn't the console window open?
There are several ways to write output from a Visual Studio unit test in C#:
- Console.Write - The Visual Studio test harness will capture this and show it when you select the test in the Test Explorer and click the Output link. Does not show up in the Visual Studio Output Window when either running or debugging a unit test (arguably this is a bug).
- Debug.Write - The Visual Studio test harness will capture this and show it in the test output. Does appear in the Visual Studio Output Window when debugging a unit test, unless Visual Studio Debugging options are configured to redirect Output to the Immediate Window. Nothing will appear in the Output (or Immediate) Window if you simply run the test without debugging. By default only available in a Debug build (that is, when DEBUG constant is defined).
- Trace.Write - The Visual Studio test harness will capture this and show it in the test output. Does appear in the Visual Studio Output (or Immediate) Window when debugging a unit test (but not when simply running the test without debugging). By default available in both Debug and Release builds (that is, when TRACE constant is defined).
Confirmed in Visual Studio 2013 Professional.
C Program to find day of week given date
Here's a C99 version based on wikipedia's article about Julian Day
#include <stdio.h>
const char *wd(int year, int month, int day) {
/* using C99 compound literals in a single line: notice the splicing */
return ((const char *[]) \
{"Monday", "Tuesday", "Wednesday", \
"Thursday", "Friday", "Saturday", "Sunday"})[ \
( \
day \
+ ((153 * (month + 12 * ((14 - month) / 12) - 3) + 2) / 5) \
+ (365 * (year + 4800 - ((14 - month) / 12))) \
+ ((year + 4800 - ((14 - month) / 12)) / 4) \
- ((year + 4800 - ((14 - month) / 12)) / 100) \
+ ((year + 4800 - ((14 - month) / 12)) / 400) \
- 32045 \
) % 7];
}
int main(void) {
printf("%d-%02d-%02d: %s\n", 2011, 5, 19, wd(2011, 5, 19));
printf("%d-%02d-%02d: %s\n", 2038, 1, 19, wd(2038, 1, 19));
return 0;
}
By removing the splicing and spaces from the return line in the wd() function, it can be compacted to a 286 character single line :)
Difference between two dates in MySQL
Get the date difference in days using DATEDIFF
SELECT DATEDIFF('2010-10-08 18:23:13', '2010-09-21 21:40:36') AS days;
+------+
| days |
+------+
| 17 |
+------+
OR
Refer the below link MySql difference between two timestamps in days?
Ignore .classpath and .project from Git
The git solution for such scenarios is setting SKIP-WORKTREE BIT. Run only the following command:
git update-index --skip-worktree .classpath .gitignore
It is used when you want git to ignore changes of files that are already managed by git and exist on the index. This is a common use case for config files.
Running git rm --cached doesn't work for the scenario mentioned in the question. If I simplify the question, it says:
How to have
.classpathand.projecton the repo while each one can change it locally and git ignores this change?
As I commented under the accepted answer, the drawback of git rm --cached is that it causes a change in the index, so you need to commit the change and then push it to the remote repository. As a result, .classpath and .project won't be available on the repo while the PO wants them to be there so anyone that clones the repo for the first time, they can use it.
What is SKIP-WORKTREE BIT?
Based on git documentaion:
Skip-worktree bit can be defined in one (long) sentence: When reading an entry, if it is marked as skip-worktree, then Git pretends its working directory version is up to date and read the index version instead. Although this bit looks similar to assume-unchanged bit, its goal is different from assume-unchanged bit’s. Skip-worktree also takes precedence over assume-unchanged bit when both are set.
More details is available here.
Javascript : natural sort of alphanumerical strings
Building on @Adrien Be's answer above and using the code that Brian Huisman & David koelle created, here is a modified prototype sorting for an array of objects:
//Usage: unsortedArrayOfObjects.alphaNumObjectSort("name");
//Test Case: var unsortedArrayOfObjects = [{name: "a1"}, {name: "a2"}, {name: "a3"}, {name: "a10"}, {name: "a5"}, {name: "a13"}, {name: "a20"}, {name: "a8"}, {name: "8b7uaf5q11"}];
//Sorted: [{name: "8b7uaf5q11"}, {name: "a1"}, {name: "a2"}, {name: "a3"}, {name: "a5"}, {name: "a8"}, {name: "a10"}, {name: "a13"}, {name: "a20"}]
// **Sorts in place**
Array.prototype.alphaNumObjectSort = function(attribute, caseInsensitive) {
for (var z = 0, t; t = this[z]; z++) {
this[z].sortArray = new Array();
var x = 0, y = -1, n = 0, i, j;
while (i = (j = t[attribute].charAt(x++)).charCodeAt(0)) {
var m = (i == 46 || (i >=48 && i <= 57));
if (m !== n) {
this[z].sortArray[++y] = "";
n = m;
}
this[z].sortArray[y] += j;
}
}
this.sort(function(a, b) {
for (var x = 0, aa, bb; (aa = a.sortArray[x]) && (bb = b.sortArray[x]); x++) {
if (caseInsensitive) {
aa = aa.toLowerCase();
bb = bb.toLowerCase();
}
if (aa !== bb) {
var c = Number(aa), d = Number(bb);
if (c == aa && d == bb) {
return c - d;
} else {
return (aa > bb) ? 1 : -1;
}
}
}
return a.sortArray.length - b.sortArray.length;
});
for (var z = 0; z < this.length; z++) {
// Here we're deleting the unused "sortArray" instead of joining the string parts
delete this[z]["sortArray"];
}
}
Is it possible to see more than 65536 rows in Excel 2007?
I am not 100% sure where all of the other suggestions are trying to go, but the issue is basically related to the extension that you have on the file. If you save the file as a Excel 97/2003 workbook it will not allow you to see all million rows. Create a new sheet and save it as a workbook and you will see all million. Note: the extension will be .xlsx
Open fancybox from function
You don't have to add you own click event handler at all. Just initialize the element with fancybox:
$(function() {
$('a[href="#modalMine"]').fancybox({
'autoScale': true,
'transitionIn': 'elastic',
'transitionOut': 'elastic',
'speedIn': 500,
'speedOut': 300,
'autoDimensions': true,
'centerOnScroll': true // as MattBall already said, remove the comma
});
});
Done. Fancybox already binds a click handler that opens the box. Have a look at the HowTo section.
Later if you want to open the box programmatically, raise the click event on that element:
$('a[href="#modalMine"]').click();
Map a network drive to be used by a service
ForcePush,
NOTE: The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as "Disconnected Network Drive (Z:)". Do not let the name fool you. It may claim to be disconnected but it will work for everyone. That's how you can tell this hack is not supported by M$...
It all depends on the share permissions. If you have Everyone in the share permissions, this mapped drive will be accessible by other users. But if you have only some particular user whose credentials you used in your batch script and this batch script was added to the Startup scripts, only System account will have access to that share not even Administrator. So if you use, for example, a scheduled ntbackuo job, System account must be used in 'Run as'. If your service's 'Log on as: Local System account' it should work.
What I did, I didn't map any drive letter in my startup script, just used net use \\\server\share ... and used UNC path in my scheduled jobs. Added a logon script (or just add a batch file to the startup folder) with the mapping to the same share with some drive letter: net use Z: \\\... with the same credentials. Now the logged user can see and access that mapped drive. There are 2 connections to the same share. In this case the user doesn't see that annoying "Disconnected network drive ...". But if you really need access to that share by the drive letter not just UNC, map that share with the different drive letters, e.g. Y for System and Z for users.
CSS display:inline property with list-style-image: property on <li> tags
You want the list items to line up next to each other, but not really be inline elements. So float them instead:
ol.widgets li {
float: left;
margin-left: 10px;
}
Detect all Firefox versions in JS
here it it
var ffversion = '18';
var is_firefox = navigator.userAgent.toLowerCase().indexOf('firefox/'+ffversion) > -1;
alert(is_firefox);
How to create dictionary and add key–value pairs dynamically?
JavaScript's Object is in itself like a dictionary. No need to reinvent the wheel.
var dict = {};
// Adding key-value -pairs
dict['key'] = 'value'; // Through indexer
dict.anotherKey = 'anotherValue'; // Through assignment
// Looping through
for (var item in dict) {
console.log('key:' + item + ' value:' + dict[item]);
// Output
// key:key value:value
// key:anotherKey value:anotherValue
}
// Non existent key
console.log(dict.notExist); // undefined
// Contains key?
if (dict.hasOwnProperty('key')) {
// Remove item
delete dict.key;
}
// Looping through
for (var item in dict) {
console.log('key:' + item + ' value:' + dict[item]);
// Output
// key:anotherKey value:anotherValue
}
excel plot against a date time x series
There is an easy workaround for this problem
What you need to do, is format your dates as DD/MM/YYYY (or whichever way around you like)
Insert a column next to the time and date columns, put a formula in this column that adds them together. e.g. =A5+B5.
Format this inserted column into DD/MM/YYYY hh:mm:ss which can be found in the custom category on the formatting section
Plot a scatter graph
Badabing badaboom
If you are unhappy with this workaround, learn to use GNUplot :)
How to install a specific version of a package with pip?
Use ==:
pip install django_modeltranslation==0.4.0-beta2
How to read appSettings section in the web.config file?
Since you're accessing a web.config you should probably use
using System.Web.Configuration;
WebConfigurationManager.AppSettings["configFile"]
How to stash my previous commit?
If it were me, I would avoid any risky revision editing and do the following instead:
Create a new branch on the SHA where 222 was committed, basically as a bookmark.
Switch back to the main branch. In it, revert commit 222.
Push all the commits that have been made, which will push commit 111 only, because 222 was reverted.
Work on the branch from step #1 if needed. Merge from the trunk to it as needed to keep it up to date. I wouldn't bother with stash.
When it's time for the changes in commit 222 to go in, that branch can be merged to trunk.
How to get number of video views with YouTube API?
You can use the new YouTube Data API v3
if you retrieve the video, the statistics part contains the viewCount:
from the doc:
https://developers.google.com/youtube/v3/docs/videos#resource
statistics.viewCount / The number of times the video has been viewed.
You can retrieve this info in the client side, or in the server side using some of the client libraries:
https://developers.google.com/youtube/v3/libraries
And you can test the API call from the doc:
https://developers.google.com/youtube/v3/docs/videos/list
Sample:
Request:
GET https://www.googleapis.com/youtube/v3/videos?part=statistics&id=Q5mHPo2yDG8&key={YOUR_API_KEY}
Authorization: Bearer ya29.AHES6ZSCT9BmIXJmjHlRlKMmVCU22UQzBPRuxzD7Zg_09hsG
X-JavaScript-User-Agent: Google APIs Explorer
Response:
200 OK
- Show headers -
{
"kind": "youtube#videoListResponse",
"etag": "\"g-RLCMLrfPIk8n3AxYYPPliWWoo/dZ8K81pnD1mOCFyHQkjZNynHpYo\"",
"pageInfo": {
"totalResults": 1,
"resultsPerPage": 1
},
"items": [
{
"id": "Q5mHPo2yDG8",
"kind": "youtube#video",
"etag": "\"g-RLCMLrfPIk8n3AxYYPPliWWoo/4NA7C24hM5mprqQ3sBwI5Lo9vZE\"",
"statistics": {
"viewCount": "36575966",
"likeCount": "127569",
"dislikeCount": "5715",
"favoriteCount": "0",
"commentCount": "20317"
}
}
]
}
How to get the full url in Express?
Just the code below was enough for me!
const baseUrl = `${request.protocol}://${request.headers.host}`;
// http://127.0.0.1:3333
how to make label visible/invisible?
you could try
if (isValid) {
document.getElementById("endTimeLabel").style.display = "none";
}else {
document.getElementById("endTimeLabel").style.display = "block";
}
alone those lines
How to remove an item from an array in Vue.js
You can delete item through id
<button @click="deleteEvent(event.id)">Delete</button>
Inside your JS code
deleteEvent(id){
this.events = this.events.filter((e)=>e.id !== id )
}
Vue wraps an observed array’s mutation methods so they will also trigger view updates. Click here for more details.
You might think this will cause Vue to throw away the existing DOM and re-render the entire list - luckily, that is not the case.
How to enable scrolling of content inside a modal?
This is how I did it purely with CSS overriding some classes:
.modal {
height: 60%;
.modal-body {
height: 80%;
overflow-y: scroll;
}
}
Hope it helps you.
How to Install pip for python 3.7 on Ubuntu 18?
When i use apt install python3-pip, i get a lot of packages need install, but i donot need them. So, i DO like this:
apt update
apt-get install python3-setuptools
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py
rm -f get-pip.py
php multidimensional array get values
This is the way to iterate on this array:
foreach($hotels as $row) {
foreach($row['rooms'] as $k) {
echo $k['boards']['board_id'];
echo $k['boards']['price'];
}
}
You want to iterate on the hotels and the rooms (the ones with numeric indexes), because those seem to be the "collections" in this case. The other arrays only hold and group properties.
How to get single value of List<object>
You can access the fields by indexing the object array:
foreach (object[] item in selectedValues)
{
idTextBox.Text = item[0];
titleTextBox.Text = item[1];
contentTextBox.Text = item[2];
}
That said, you'd be better off storing the fields in a small class of your own if the number of items is not dynamic:
public class MyObject
{
public int Id { get; set; }
public string Title { get; set; }
public string Content { get; set; }
}
Then you can do:
foreach (MyObject item in selectedValues)
{
idTextBox.Text = item.Id;
titleTextBox.Text = item.Title;
contentTextBox.Text = item.Content;
}
When creating a service with sc.exe how to pass in context parameters?
If you tried all of the above and still can't pass args to your service, if your service was written in C/C++, here's what could be the problem: when you start your service through "sc start arg1 arg2...", SC calls your service's ServiceMain function directly with those args. But when Windows start your service (at boot time, for example), it's your service's main function (_tmain) that's called, with params from the registry's "binPath".
What is the best way to remove a table row with jQuery?
You're right:
$('#myTableRow').remove();
This works fine if your row has an id, such as:
<tr id="myTableRow"><td>blah</td></tr>
If you don't have an id, you can use any of jQuery's plethora of selectors.
Convert Little Endian to Big Endian
"I swap each bytes right?" -> yes, to convert between little and big endian, you just give the bytes the opposite order. But at first realize few things:
- size of
uint32_tis 32bits, which is 4 bytes, which is 8 HEX digits - mask
0xfretrieves the 4 least significant bits, to retrieve 8 bits, you need0xff
so in case you want to swap the order of 4 bytes with that kind of masks, you could:
uint32_t res = 0;
b0 = (num & 0xff) << 24; ; least significant to most significant
b1 = (num & 0xff00) << 8; ; 2nd least sig. to 2nd most sig.
b2 = (num & 0xff0000) >> 8; ; 2nd most sig. to 2nd least sig.
b3 = (num & 0xff000000) >> 24; ; most sig. to least sig.
res = b0 | b1 | b2 | b3 ;
Is there a way to crack the password on an Excel VBA Project?
The accepted answer didn't work in Excel 2019 on Windows 10. Found out the extra steps we need to take to see the locked macro. I am summarizing the steps.
Add a .zip to the end of the excel filename and hit enter
Once the file has been changed to a ZIP file, open it by double clicking on it
Inside you would see a folder called xl like below
Inside xl, you'll find a file called vbaProject.bin, copy/paste it on the desktop
Go to the online Hexadecimal Editor HexEd.it
Search for the following texts DPB=... and change them to DPx=...
Save the file and close HexEd.it
Copy/Paste the updated file from your desktop inside the ZIP file (you would need to overwrite it)
Remove the .zip extension from the end of the filename and add the excel extention again.
Open the file in excel - you may receive a couple of error notifications, just click through them.
==== EXTRA STEPS OVER THE ACCEPTED ANSWER =====
- Open the Visual Basic window (usually ALT+F11 if I remember correctly) and open the VBAProject properties (Tools menu).
- Click on the Protection tab and change (do not remove at this stage) the password to something short and easy to remember (we'll be removing in next step).
- Save the workbook and then close and reopen.
- Open again the Visual Basic window and enter the password you just put in. Redo the previous step but this time you can remove (delete) the password.
- Save the workbook and you have now removed the password.
Extra steps are taken from following site https://confluence.jaytaala.com/display/TKB/Remove+Excel+VBA+password
Is there a real solution to debug cordova apps
FOR ANDROID:
You only need to enable “USB remote debugger” within your android device and plug with a USB cable. Then open your application in the device. Chrome will detect the remote browser and you can see the console in the same way than you see it when you use Chrome locally.
Use this link: chrome://inspect/#devices in Chrome browser (you'll have to paste it into the nav bar).
If your app crashes in the device you only need to see the console’s log within your browser and see what happens. You also can add functionality, change variables, and override functions in the same way than we do it with our local browser.
Read this article for more information on the steps to take.
This will work ONLY with devices running Android 4.4+.
FOR iOS:
Use Safari for iOS, follow these steps:
1.In your iOS device go to Settings > Safari > Advanced > Web Inspector to enable Web Inspector
2.Open Safari on your iOS device.
3.Connect it to your computer via USB.
4.Open Safari on your computer.
5.In Safari’s menu, go to Develop and, look for your device’s name.
6.Select the tab you want to debug.
Display all post meta keys and meta values of the same post ID in wordpress
Default Usage
Get the meta for all keys:
<?php $meta = get_post_meta($post_id); ?>
Get the meta for a single key:
<?php $key_1_values = get_post_meta( 76, 'key_1' ); ?>
for example:
$myvals = get_post_meta($post_id);
foreach($myvals as $key=>$val)
{
echo $key . ' : ' . $val[0] . '<br/>';
}
Note: some unwanted meta keys starting with "underscore(_)" will also come, so you will need to filter them out.
For reference: See Codex
How to reverse MD5 to get the original string?
No, that's not really possible, as
- there can be more than one string giving the same MD5
- it was designed to be hard to "reverse"
The goal of the MD5 and its family of hashing functions is
- to get short "extracts" from long string
- to make it hard to guess where they come from
- to make it hard to find collisions, that is other words having the same hash (which is a very similar exigence as the second one)
Think that you can get the MD5 of any string, even very long. And the MD5 is only 16 bytes long (32 if you write it in hexa to store or distribute it more easily). If you could reverse them, you'd have a magical compacting scheme.
This being said, as there aren't so many short strings (passwords...) used in the world, you can test them from a dictionary (that's called "brute force attack") or even google for your MD5. If the word is common and wasn't salted, you have a reasonable chance to succeed...
How to implement WiX installer upgrade?
Finally I found a solution - I'm posting it here for other people who might have the same problem (all 5 of you):
- Change the product ID to *
Under product add The following:
<Property Id="PREVIOUSVERSIONSINSTALLED" Secure="yes" /> <Upgrade Id="YOUR_GUID"> <UpgradeVersion Minimum="1.0.0.0" Maximum="99.0.0.0" Property="PREVIOUSVERSIONSINSTALLED" IncludeMinimum="yes" IncludeMaximum="no" /> </Upgrade>Under InstallExecuteSequence add:
<RemoveExistingProducts Before="InstallInitialize" />
From now on whenever I install the product it removed previous installed versions.
Note: replace upgrade Id with your own GUID
How to Validate a DateTime in C#?
protected static bool CheckDate(DateTime date)
{
if(new DateTime() == date)
return false;
else
return true;
}
Assigning default values to shell variables with a single command in bash
see here under 3.5.3(shell parameter expansion)
so in your case
${VARIABLE:-default}
How to describe "object" arguments in jsdoc?
By now there are 4 different ways to document objects as parameters/types. Each has its own uses. Only 3 of them can be used to document return values, though.
For objects with a known set of properties (Variant A)
/**
* @param {{a: number, b: string, c}} myObj description
*/
This syntax is ideal for objects that are used only as parameters for this function and don't require further description of each property.
It can be used for @returns as well.
For objects with a known set of properties (Variant B)
Very useful is the parameters with properties syntax:
/**
* @param {Object} myObj description
* @param {number} myObj.a description
* @param {string} myObj.b description
* @param {} myObj.c description
*/
This syntax is ideal for objects that are used only as parameters for this function and that require further description of each property.
This can not be used for @returns.
For objects that will be used at more than one point in source
In this case a @typedef comes in very handy. You can define the type at one point in your source and use it as a type for @param or @returns or other JSDoc tags that can make use of a type.
/**
* @typedef {Object} Person
* @property {string} name how the person is called
* @property {number} age how many years the person lived
*/
You can then use this in a @param tag:
/**
* @param {Person} p - Description of p
*/
Or in a @returns:
/**
* @returns {Person} Description
*/
For objects whose values are all the same type
/**
* @param {Object.<string, number>} dict
*/
The first type (string) documents the type of the keys which in JavaScript is always a string or at least will always be coerced to a string. The second type (number) is the type of the value; this can be any type.
This syntax can be used for @returns as well.
Resources
Useful information about documenting types can be found here:
https://jsdoc.app/tags-type.html
PS:
to document an optional value you can use []:
/**
* @param {number} [opt_number] this number is optional
*/
or:
/**
* @param {number|undefined} opt_number this number is optional
*/
What is correct media query for IPad Pro?
I can't guarantee that this will work for every new iPad Pro which will be released but this works pretty well as of 2019:
@media only screen and (min-width: 1024px) and (max-height: 1366px)
and (-webkit-min-device-pixel-ratio: 1.5) and (hover: none) {
/* ... */
}
RecyclerView expand/collapse items
//Global Variable
private int selectedPosition = -1;
@Override
public void onBindViewHolder(final CustomViewHolder customViewHolder, final int i) {
final int position = i;
final GetProductCatalouge.details feedItem = this.postBeanses.get(i);
customViewHolder.lly_main.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
selectedPosition = i;
notifyDataSetChanged();
}
});
if (selectedPosition == i) {
if (customViewHolder.lly_hsn_code.getVisibility() == View.VISIBLE) {
customViewHolder.lly_hsn_code.setVisibility(View.GONE);
customViewHolder.lly_sole.setVisibility(View.GONE);
customViewHolder.lly_sole_material.setVisibility(View.GONE);
} else {
customViewHolder.lly_hsn_code.setVisibility(View.VISIBLE);
customViewHolder.lly_sole.setVisibility(View.VISIBLE);
customViewHolder.lly_sole_material.setVisibility(View.VISIBLE);
}
} else {
customViewHolder.lly_hsn_code.setVisibility(View.GONE);
customViewHolder.lly_sole.setVisibility(View.GONE);
customViewHolder.lly_sole_material.setVisibility(View.GONE);
}
}
How to add comments into a Xaml file in WPF?
I assume those XAML namespace declarations are in the parent tag of your control? You can't put comments inside of another tag. Other than that, the syntax you're using is correct.
<UserControl xmlns="...">
<!-- Here's a valid comment. Notice it's outside the <UserControl> tag's braces -->
[..snip..]
</UserControl>
WPF Add a Border to a TextBlock
No, you need to wrap your TextBlock in a Border. Example:
<Border BorderThickness="1" BorderBrush="Black">
<TextBlock ... />
</Border>
Of course, you can set these properties (BorderThickness, BorderBrush) through styles as well:
<Style x:Key="notCalledBorder" TargetType="{x:Type Border}">
<Setter Property="BorderThickness" Value="1" />
<Setter Property="BorderBrush" Value="Black" />
</Style>
<Border Style="{StaticResource notCalledBorder}">
<TextBlock ... />
</Border>
The most efficient way to remove first N elements in a list?
l = [1, 2, 3, 4, 5]
del l[0:3] # Here 3 specifies the number of items to be deleted.
This is the code if you want to delete a number of items from the list. You might as well skip the zero before the colon. It does not have that importance. This might do as well.
l = [1, 2, 3, 4, 5]
del l[:3] # Here 3 specifies the number of items to be deleted.
Should I mix AngularJS with a PHP framework?
It seems you may be more comfortable with developing in PHP you let this hold you back from utilizing the full potential with web applications.
It is indeed possible to have PHP render partials and whole views, but I would not recommend it.
To fully utilize the possibilities of HTML and javascript to make a web application, that is, a web page that acts more like an application and relies heavily on client side rendering, you should consider letting the client maintain all responsibility of managing state and presentation. This will be easier to maintain, and will be more user friendly.
I would recommend you to get more comfortable thinking in a more API centric approach. Rather than having PHP output a pre-rendered view, and use angular for mere DOM manipulation, you should consider having the PHP backend output the data that should be acted upon RESTFully, and have Angular present it.
Using PHP to render the view:
/user/account
if($loggedIn)
{
echo "<p>Logged in as ".$user."</p>";
}
else
{
echo "Please log in.";
}
How the same problem can be solved with an API centric approach by outputting JSON like this:
api/auth/
{
authorized:true,
user: {
username: 'Joe',
securityToken: 'secret'
}
}
and in Angular you could do a get, and handle the response client side.
$http.post("http://example.com/api/auth", {})
.success(function(data) {
$scope.isLoggedIn = data.authorized;
});
To blend both client side and server side the way you proposed may be fit for smaller projects where maintainance is not important and you are the single author, but I lean more towards the API centric way as this will be more correct separation of conserns and will be easier to maintain.
How to make java delay for a few seconds?
Java:
For calculating times we use this method:
import java.text.SimpleDateFormat;
import java.util.Calendar;
public static String getCurrentTime() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
return sdf.format(cal.getTime());
}
Second:
import java.util.concurrent.TimeUnit;
System.out.println("Start delay of 10 seconds, Time is: " + getCurrentTime());
TimeUnit.SECONDS.sleep(10);
System.out.println("And delay of 10 seconds, Time is: " + getCurrentTime());
Output:
Start delay of 10 seconds, Time is: 14:19:08
And delay of 10 seconds, Time is: 14:19:18
Minutes:
import java.util.concurrent.TimeUnit;
System.out.println("Start delay of 1 Minute, Time is: " + getCurrentTime());
TimeUnit.MINUTES.sleep(1);
System.out.println("And delay of 1 Minute, Time is: " + getCurrentTime());
Output:
Start delay of 1 Minute, Time is: 14:21:20
And delay of 1 Minute, Time is: 14:22:20
Milliseconds:
import java.util.concurrent.TimeUnit;
System.out.println("Start delay of 2000 milliseconds, Time is: " +getCurrentTime());
TimeUnit.MILLISECONDS.sleep(2000);
System.out.println("And delay of 2000 milliseconds, Time is: " + getCurrentTime());
Output:
Start delay of 2000 milliseconds, Time is: 14:23:44
And delay of 2000 milliseconds, Time is: 14:23:46
Or:
Thread.sleep(1000); //milliseconds
Can't connect to MySQL server on 'localhost' (10061) after Installation
I had the same error. I resolved in this way
Go to start- MySQL Installer-community and run again the installer as a re-configuration(you will be asked so).
Once asked if you want make MySQL instance to run as a Windows service, check the box.
In case would do not work, try unistalling and installing again, and check the box to run MySQL as Windows service.
Emulator in Android Studio doesn't start
if you are finding difficult in opening Emulator in Android Studio you can also download genymotion in your android studio.
MySQL 'create schema' and 'create database' - Is there any difference
So, there is no difference between MySQL "database" and MySQL "schema": these are two names for the same thing - a namespace for tables and other DB objects.
For people with Oracle background: MySQL "database" a.k.a. MySQL "schema" corresponds to Oracle schema. The difference between MySQL and Oracle CREATE SCHEMA commands is that in Oracle the CREATE SCHEMA command does not actually create a schema but rather populates it with tables and views. And Oracle's CREATE DATABASE command does a very different thing than its MySQL counterpart.
How can I call PHP functions by JavaScript?
Yes, you can do ajax request to server with your data in request parameters, like this (very simple):
Note that the following code uses jQuery
jQuery.ajax({
type: "POST",
url: 'your_functions_address.php',
dataType: 'json',
data: {functionname: 'add', arguments: [1, 2]},
success: function (obj, textstatus) {
if( !('error' in obj) ) {
yourVariable = obj.result;
}
else {
console.log(obj.error);
}
}
});
and your_functions_address.php like this:
<?php
header('Content-Type: application/json');
$aResult = array();
if( !isset($_POST['functionname']) ) { $aResult['error'] = 'No function name!'; }
if( !isset($_POST['arguments']) ) { $aResult['error'] = 'No function arguments!'; }
if( !isset($aResult['error']) ) {
switch($_POST['functionname']) {
case 'add':
if( !is_array($_POST['arguments']) || (count($_POST['arguments']) < 2) ) {
$aResult['error'] = 'Error in arguments!';
}
else {
$aResult['result'] = add(floatval($_POST['arguments'][0]), floatval($_POST['arguments'][1]));
}
break;
default:
$aResult['error'] = 'Not found function '.$_POST['functionname'].'!';
break;
}
}
echo json_encode($aResult);
?>
R command for setting working directory to source file location in Rstudio
Most GUIs assume that if you are in a directory and "open", double-click, or otherwise attempt to execute an .R file, that the directory in which it resides will be the working directory unless otherwise specified. The Mac GUI provides a method to change that default behavior which is changeable in the Startup panel of Preferences that you set in a running session and become effective at the next "startup". You should be also looking at:
?Startup
The RStudio documentation says:
"When launched through a file association, RStudio automatically sets the working directory to the directory of the opened file." The default setup is for RStudio to be register as a handler for .R files, although there is also mention of ability to set a default "association" with RStudio for .Rdata and .R extensions. Whether having 'handler' status and 'association' status are the same on Linux, I cannot tell.
Count number of objects in list
I spent ages trying to figure this out but it is simple! You can use length(·). length(mylist) will tell you the number of objects mylist contains.
... and just realised someone had already answered this- sorry!
Replace or delete certain characters from filenames of all files in a folder
Use PowerShell to do anything smarter for a DOS prompt. Here, I've shown how to batch rename all the files and directories in the current directory that contain spaces by replacing them with _ underscores.
Dir |
Rename-Item -NewName { $_.Name -replace " ","_" }
EDIT :
Optionally, the Where-Object command can be used to filter out ineligible objects for the successive cmdlet (command-let). The following are some examples to illustrate the flexibility it can afford you:
To skip any document files
Dir | Where-Object { $_.Name -notmatch "\.(doc|xls|ppt)x?$" } | Rename-Item -NewName { $_.Name -replace " ","_" }To process only directories (pre-3.0 version)
Dir | Where-Object { $_.Mode -match "^d" } | Rename-Item -NewName { $_.Name -replace " ","_" }PowerShell v3.0 introduced new
Dirflags. You can also useDir -Directorythere.To skip any files already containing an underscore (or some other character)
Dir | Where-Object { -not $_.Name.Contains("_") } | Rename-Item -NewName { $_.Name -replace " ","_" }
How to handle login pop up window using Selenium WebDriver?
Use the approach where you send username and password in URL Request:
http://username:[email protected]
So just to make it more clear. The username is username password is password and the rest is usual URL of your test web
Works for me without needing any tweaks.
Sample Java code:
public static final String TEST_ENVIRONMENT = "the-site.com";
private WebDriver driver;
public void login(String uname, String pwd){
String URL = "http://" + uname + ":" + pwd + "@" + TEST_ENVIRONMENT;
driver.get(URL);
}
@Test
public void testLogin(){
driver = new FirefoxDriver();
login("Pavel", "UltraSecretPassword");
//Assert...
}
Copy mysql database from remote server to local computer
C:\Users\>mysqldump -u root -p -h ip address --databases database_name -r sql_file.sql
Enter password: your_password
XAMPP keeps showing Dashboard/Welcome Page instead of the Configuration Page
I was also experiencing the same issue. 5.5.24 was the latest version that worked for me. The Apache Friends blog has a post, https://www.apachefriends.org/blog/new_xampp_20150723.html, that mentions the newer versions shipping with the 'Dashboard'.
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
This was caused because of something like this in my case:
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<include-prelude>/headerfooter/header.jsp</include-prelude>
<include-coda>/headerfooter/footer.jsp</include-coda>
</jsp-property-group>
</jsp-config>
The problem was actually I did not have header.jsp in my project. However the error message was still saying index_jsp was not found.
Get value of a specific object property in C# without knowing the class behind
Reflection and dynamic value access are correct solutions to this question but are quite slow. If your want something faster then you can create dynamic method using expressions:
object value = GetValue();
string propertyName = "MyProperty";
var parameter = Expression.Parameter(typeof(object));
var cast = Expression.Convert(parameter, value.GetType());
var propertyGetter = Expression.Property(cast, propertyName);
var castResult = Expression.Convert(propertyGetter, typeof(object));//for boxing
var propertyRetriver = Expression.Lambda<Func<object, object>>(castResult, parameter).Compile();
var retrivedPropertyValue = propertyRetriver(value);
This way is faster if you cache created functions. For instance in dictionary where key would be the actual type of object assuming that property name is not changing or some combination of type and property name.
change directory in batch file using variable
simple way to do this... here are the example
cd program files
cd poweriso
piso mount D:\<Filename.iso> <Virtual Drive>
Pause
this will mount the ISO image to the specific drive...use
pip connection failure: cannot fetch index base URL http://pypi.python.org/simple/
I had the same issue with pip 1.5.6.
I just deleted the ~/.pip folder and it worked like a charm.
rm -r ~/.pip/
How can I uninstall npm modules in Node.js?
If it doesn't work with npm uninstall <module_name> try it globally by typing -g.
Maybe you just need to do it as an superUser/administrator with sudo npm uninstall <module_name>.
Trigger css hover with JS
If you bind events to the onmouseover and onmouseout events in Jquery, you can then trigger that effect using mouseenter().
What are you trying to accomplish?
What is the recommended way to delete a large number of items from DynamoDB?
We don't have option to truncate dynamo tables. we have to drop the table and create again . DynamoDB Charges are based on ReadCapacityUnits & WriteCapacityUnits . If we delete all items using BatchWriteItem function, it will use WriteCapacityUnits.So better to delete specific records or delete the table and start again .
How can I create a copy of an object in Python?
How can I create a copy of an object in Python?
So, if I change values of the fields of the new object, the old object should not be affected by that.
You mean a mutable object then.
In Python 3, lists get a copy method (in 2, you'd use a slice to make a copy):
>>> a_list = list('abc')
>>> a_copy_of_a_list = a_list.copy()
>>> a_copy_of_a_list is a_list
False
>>> a_copy_of_a_list == a_list
True
Shallow Copies
Shallow copies are just copies of the outermost container.
list.copy is a shallow copy:
>>> list_of_dict_of_set = [{'foo': set('abc')}]
>>> lodos_copy = list_of_dict_of_set.copy()
>>> lodos_copy[0]['foo'].pop()
'c'
>>> lodos_copy
[{'foo': {'b', 'a'}}]
>>> list_of_dict_of_set
[{'foo': {'b', 'a'}}]
You don't get a copy of the interior objects. They're the same object - so when they're mutated, the change shows up in both containers.
Deep copies
Deep copies are recursive copies of each interior object.
>>> lodos_deep_copy = copy.deepcopy(list_of_dict_of_set)
>>> lodos_deep_copy[0]['foo'].add('c')
>>> lodos_deep_copy
[{'foo': {'c', 'b', 'a'}}]
>>> list_of_dict_of_set
[{'foo': {'b', 'a'}}]
Changes are not reflected in the original, only in the copy.
Immutable objects
Immutable objects do not usually need to be copied. In fact, if you try to, Python will just give you the original object:
>>> a_tuple = tuple('abc')
>>> tuple_copy_attempt = a_tuple.copy()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'tuple' object has no attribute 'copy'
Tuples don't even have a copy method, so let's try it with a slice:
>>> tuple_copy_attempt = a_tuple[:]
But we see it's the same object:
>>> tuple_copy_attempt is a_tuple
True
Similarly for strings:
>>> s = 'abc'
>>> s0 = s[:]
>>> s == s0
True
>>> s is s0
True
and for frozensets, even though they have a copy method:
>>> a_frozenset = frozenset('abc')
>>> frozenset_copy_attempt = a_frozenset.copy()
>>> frozenset_copy_attempt is a_frozenset
True
When to copy immutable objects
Immutable objects should be copied if you need a mutable interior object copied.
>>> tuple_of_list = [],
>>> copy_of_tuple_of_list = tuple_of_list[:]
>>> copy_of_tuple_of_list[0].append('a')
>>> copy_of_tuple_of_list
(['a'],)
>>> tuple_of_list
(['a'],)
>>> deepcopy_of_tuple_of_list = copy.deepcopy(tuple_of_list)
>>> deepcopy_of_tuple_of_list[0].append('b')
>>> deepcopy_of_tuple_of_list
(['a', 'b'],)
>>> tuple_of_list
(['a'],)
As we can see, when the interior object of the copy is mutated, the original does not change.
Custom Objects
Custom objects usually store data in a __dict__ attribute or in __slots__ (a tuple-like memory structure.)
To make a copyable object, define __copy__ (for shallow copies) and/or __deepcopy__ (for deep copies).
from copy import copy, deepcopy
class Copyable:
__slots__ = 'a', '__dict__'
def __init__(self, a, b):
self.a, self.b = a, b
def __copy__(self):
return type(self)(self.a, self.b)
def __deepcopy__(self, memo): # memo is a dict of id's to copies
id_self = id(self) # memoization avoids unnecesary recursion
_copy = memo.get(id_self)
if _copy is None:
_copy = type(self)(
deepcopy(self.a, memo),
deepcopy(self.b, memo))
memo[id_self] = _copy
return _copy
Note that deepcopy keeps a memoization dictionary of id(original) (or identity numbers) to copies. To enjoy good behavior with recursive data structures, make sure you haven't already made a copy, and if you have, return that.
So let's make an object:
>>> c1 = Copyable(1, [2])
And copy makes a shallow copy:
>>> c2 = copy(c1)
>>> c1 is c2
False
>>> c2.b.append(3)
>>> c1.b
[2, 3]
And deepcopy now makes a deep copy:
>>> c3 = deepcopy(c1)
>>> c3.b.append(4)
>>> c1.b
[2, 3]
install cx_oracle for python
This worked for me
python -m pip install cx_Oracle --upgrade
For details refer to the oracle quick start guide
https://cx-oracle.readthedocs.io/en/latest/installation.html#quick-start-cx-oracle-installation
In Oracle, is it possible to INSERT or UPDATE a record through a view?
YES, you can Update and Insert into view and that edit will be reflected on the original table....
BUT
1-the view should have all the NOT NULL values on the table
2-the update should have the same rules as table... "updating primary key related to other foreign key.. etc"...
How to update column value in laravel
I tried to update a field with
$table->update(['field' => 'val']);
But it wasn't working, i had to modify my table Model to authorize this field to be edited : add 'field' in the array "protected $fillable"
Hope it will help someone :)
How to getElementByClass instead of GetElementById with JavaScript?
The getElementsByClassName method is now natively supported by the most recent versions of Firefox, Safari, Chrome, IE and Opera, you could make a function to check if a native implementation is available, otherwise use the Dustin Diaz method:
function getElementsByClassName(node,classname) {
if (node.getElementsByClassName) { // use native implementation if available
return node.getElementsByClassName(classname);
} else {
return (function getElementsByClass(searchClass,node) {
if ( node == null )
node = document;
var classElements = [],
els = node.getElementsByTagName("*"),
elsLen = els.length,
pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)"), i, j;
for (i = 0, j = 0; i < elsLen; i++) {
if ( pattern.test(els[i].className) ) {
classElements[j] = els[i];
j++;
}
}
return classElements;
})(classname, node);
}
}
Usage:
function toggle_visibility(className) {
var elements = getElementsByClassName(document, className),
n = elements.length;
for (var i = 0; i < n; i++) {
var e = elements[i];
if(e.style.display == 'block') {
e.style.display = 'none';
} else {
e.style.display = 'block';
}
}
}
setting multiple column using one update
Just add parameters, split by comma:
UPDATE tablename SET column1 = "value1", column2 = "value2" ....
See also: mySQL manual on UPDATE
WordPress - Check if user is logged in
get_current_user_id() will return the current user id (an integer), or will return 0 if the user is not logged in.
if (get_current_user_id()) {
// display navbar here
}
More details here get_current_user_id().
How to establish ssh key pair when "Host key verification failed"
Step1:$Bhargava.ssh#
ssh-keygen -R 199.95.30.220
step2:$Bhargava.ssh #
ssh-copy-id [email protected]
Enter the the password.........
step3: Bhargava .ssh #
Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-68-generic x86_64) * Documentation: https://help.ubuntu.com/ Ubuntu 14.04.3 LTS server : 228839 ip : 199.95.30.220 hostname : qt.example.com System information as of Thu Mar 24 02:13:43 EDT 2016 System load: 0.67 Processes: 321 Usage of /home: 5.1% of 497.80GB Users logged in: 0 Memory usage: 53% IP address for eth0: 199.95.30.220 Swap usage: 16% IP address for docker0: 172.17.0.1 Graph this data and manage this system at: https://landscape.canonical.com/ Last login: Wed Mar 23 02:07:29 2016 from 103.200.41.50
hostname@qt:~$
Disable Proximity Sensor during call
I also had problem with proximity sensor (I shattered screen in that region on my Nexus 6, Android Marshmallow) and none of proposed solutions / third party apps worked when I tried to disable proximity sensor. What worked for me was to calibrate the sensor using Proximity Sensor Reset/Repair. You have to follow the instruction in app (cover sensor and uncover it) and then restart your phone. Although my sensor is no longer behind the glass, it still showed slightly different results when covered / uncovered and recalibration did the job.
What I tried and didn't work? Proximity Screen Off Lite, Macrodroid and KinScreen.
What would've I tried had it still not worked?[XPOSED] Sensor Disabler, but it requires you to be rooted and have Xposed Framework, so I'm really glad I've found the easier way.
Checking version of angular-cli that's installed?
You can use npm list -global to list all the component versions currently installed on your system.
For viewing specific lists at different levels use --depth.
e.g:
npm list -global --depth 0
Volatile vs. Interlocked vs. lock
I did some test to see how the theory actually works: kennethxu.blogspot.com/2009/05/interlocked-vs-monitor-performance.html. My test was more focused on CompareExchnage but the result for Increment is similar. Interlocked is not necessary faster in multi-cpu environment. Here is the test result for Increment on a 2 years old 16 CPU server. Bare in mind that the test also involves the safe read after increase, which is typical in real world.
D:\>InterlockVsMonitor.exe 16
Using 16 threads:
InterlockAtomic.RunIncrement (ns): 8355 Average, 8302 Minimal, 8409 Maxmial
MonitorVolatileAtomic.RunIncrement (ns): 7077 Average, 6843 Minimal, 7243 Maxmial
D:\>InterlockVsMonitor.exe 4
Using 4 threads:
InterlockAtomic.RunIncrement (ns): 4319 Average, 4319 Minimal, 4321 Maxmial
MonitorVolatileAtomic.RunIncrement (ns): 933 Average, 802 Minimal, 1018 Maxmial
How to stop C++ console application from exiting immediately?
Add the following lines before any exit() function or before any returns in main():
std::cout << "Paused, press ENTER to continue." << std::endl;
cin.ignore(100000, "\n");
MySQL Workbench not displaying query results
I'm using MySqlWorkbench 6.3.9 on macOS and has this problem. I removed the app and installed 6.3.10 which solves the problem.
Twitter Bootstrap dropdown menu
<script type="text/javascript" src="http://twitter.github.com/bootstrap/assets/js/bootstrap-dropdown.js"></script>
Get Value of a Edit Text field
By using getText():
Button mButton;
EditText mEdit;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mButton = (Button)findViewById(R.id.button);
mEdit = (EditText)findViewById(R.id.edittext);
mButton.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
Log.v("EditText", mEdit.getText().toString());
}
});
}
jQuery: Check if div with certain class name exists
The simple code is given below :
if ($('.mydivclass').length > 0) {
//Things to do if class exist
}
To hide the div with particuler id :
if ($('#'+given_id+'.mydivclass').length > 0) {
//Things to do if class exist
}
Convert nested Python dict to object?
I had some problems with __getattr__ not being called so I constructed a new style class version:
class Struct(object):
'''The recursive class for building and representing objects with.'''
class NoneStruct(object):
def __getattribute__(*args):
return Struct.NoneStruct()
def __eq__(self, obj):
return obj == None
def __init__(self, obj):
for k, v in obj.iteritems():
if isinstance(v, dict):
setattr(self, k, Struct(v))
else:
setattr(self, k, v)
def __getattribute__(*args):
try:
return object.__getattribute__(*args)
except:
return Struct.NoneStruct()
def __repr__(self):
return '{%s}' % str(', '.join('%s : %s' % (k, repr(v)) for
(k, v) in self.__dict__.iteritems()))
This version also has the addition of NoneStruct that is returned when an attribute is called that is not set. This allows for None testing to see if an attribute is present. Very usefull when the exact dict input is not known (settings etc.).
bla = Struct({'a':{'b':1}})
print(bla.a.b)
>> 1
print(bla.a.c == None)
>> True
JSON.Net Self referencing loop detected
The JsonSerializer instance can be configured to ignore reference loops. Like in the following, this function allows to save a file with the content of the json serialized object:
public static void SaveJson<T>(this T obj, string FileName)
{
JsonSerializer serializer = new JsonSerializer();
serializer.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
using (StreamWriter sw = new StreamWriter(FileName))
{
using (JsonWriter writer = new JsonTextWriter(sw))
{
writer.Formatting = Formatting.Indented;
serializer.Serialize(writer, obj);
}
}
}
How to copy text to the client's clipboard using jQuery?
Copying to the clipboard is a tricky task to do in Javascript in terms of browser compatibility. The best way to do it is using a small flash. It will work on every browser. You can check it in this article.
Here's how to do it for Internet Explorer:
function copy (str)
{
//for IE ONLY!
window.clipboardData.setData('Text',str);
}
How do I set up Android Studio to work completely offline?
Just as an assist if you go with Android Studio 0.4.x offline mode (because this thread is one of the main ones that google throws up when querying this issue).
From Alex Ruiz (Google+):
If you specify dependency versions using "+" (e.g. 0.8.+) Gradle (not Android Studio) will check that you have the latest version of such dependency periodically (every 24 hours,) even in offline mode
You need to take the plus out.
How can I debug a Perl script?
If using an interactive debugger is OK for you, you can try perldebug.
How to sort with a lambda?
To much code, you can use it like this:
#include<array>
#include<functional>
int main()
{
std::array<int, 10> vec = { 1,2,3,4,5,6,7,8,9 };
std::sort(std::begin(vec),
std::end(vec),
[](int a, int b) {return a > b; });
for (auto item : vec)
std::cout << item << " ";
return 0;
}
Replace "vec" with your class and that's it.
xls to csv converter
Using xlrd is a flawed way to do this, because you lose the Date Formats in Excel.
My use case is the following.
Take an Excel File with more than one sheet and convert each one into a file of its own.
I have done this using the xlsx2csv library and calling this using a subprocess.
import csv
import sys, os, json, re, time
import subprocess
def csv_from_excel(fname):
subprocess.Popen(["xlsx2csv " + fname + " --all -d '|' -i -p "
"'<New Sheet>' > " + 'test.csv'], shell=True)
return
lstSheets = csv_from_excel(sys.argv[1])
time.sleep(3) # system needs to wait a second to recognize the file was written
with open('[YOUR PATH]/test.csv') as f:
lines = f.readlines()
firstSheet = True
for line in lines:
if line.startswith('<New Sheet>'):
if firstSheet:
sh_2_fname = line.replace('<New Sheet>', '').strip().replace(' - ', '_').replace(' ','_')
print(sh_2_fname)
sh2f = open(sh_2_fname+".csv", "w")
firstSheet = False
else:
sh2f.close()
sh_2_fname = line.replace('<New Sheet>', '').strip().replace(' - ', '_').replace(' ','_')
print(sh_2_fname)
sh2f = open(sh_2_fname+".csv", "w")
else:
sh2f.write(line)
sh2f.close()
Pandas DataFrame concat vs append
So what are you doing is with append and concat is almost equivalent. The difference is the empty DataFrame. For some reason this causes a big slowdown, not sure exactly why, will have to look at some point. Below is a recreation of basically what you did.
I almost always use concat (though in this case they are equivalent, except for the empty frame); if you don't use the empty frame they will be the same speed.
In [17]: df1 = pd.DataFrame(dict(A = range(10000)),index=pd.date_range('20130101',periods=10000,freq='s'))
In [18]: df1
Out[18]:
<class 'pandas.core.frame.DataFrame'>
DatetimeIndex: 10000 entries, 2013-01-01 00:00:00 to 2013-01-01 02:46:39
Freq: S
Data columns (total 1 columns):
A 10000 non-null values
dtypes: int64(1)
In [19]: df4 = pd.DataFrame()
The concat
In [20]: %timeit pd.concat([df1,df2,df3])
1000 loops, best of 3: 270 us per loop
This is equavalent of your append
In [21]: %timeit pd.concat([df4,df1,df2,df3])
10 loops, best of
3: 56.8 ms per loop