...How can I step through my javascript code line by line using Google Chromes developer tools without it going into javascript libraries?...
For the record: At this time (Feb/2015) both Google Chrome and Firefox have exactly what you (and I) need to avoid going inside libraries and scripts, and go beyond the code that we are interested, It's called Black Boxing:
When you blackbox a source file, the debugger will not jump into that file when stepping through code you're debugging.
More info:
This code will work perfectly in WPF. You can use it in either page load or in button click.
string screenWidth =System.Windows.SystemParameters.PrimaryScreenWidth.ToString();
string screenHeight = System.Windows.SystemParameters.PrimaryScreenHeight.ToString();
txtResolution.Text ="Resolution : "+screenWidth + " X " + screenHeight;
The answer may be outdated, since there is a name
property on the UploadedFile
class. See: Uploaded Files and Upload Handlers (Django docs). So, if you bind your form with a FileField
correctly, the access should be as easy as:
if form.is_valid():
form.cleaned_data['my_file'].name
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *cellId = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];
NSInteger lastRowIndexInSection = [tableView numberOfRowsInSection:indexPath.section] - 1;
if (row == lastRowIndexInSection) {
CGFloat halfWidthOfCell = cell.frame.size.width / 2;
cell.separatorInset = UIEdgeInsetsMake(0, halfWidthOfCell, 0, halfWidthOfCell);
}
}
The straight up answer to your question is: No. The signature for the PostAsync
method is as follows:
public Task PostAsync(Uri requestUri, HttpContent content)
So, while you can pass an object
to PostAsync
it must be of type HttpContent
and your anonymous type does not meet that criteria.
However, there are ways to accomplish what you want to accomplish. First, you will need to serialize your anonymous type to JSON, the most common tool for this is Json.NET. And the code for this is pretty trivial:
var myContent = JsonConvert.SerializeObject(data);
Next, you will need to construct a content object to send this data, I will use a ByteArrayContent
object, but you could use or create a different type if you wanted.
var buffer = System.Text.Encoding.UTF8.GetBytes(myContent);
var byteContent = new ByteArrayContent(buffer);
Next, you want to set the content type to let the API know this is JSON.
byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
Then you can send your request very similar to your previous example with the form content:
var result = client.PostAsync("", byteContent).Result
On a side note, calling the .Result
property like you're doing here can have some bad side effects such as dead locking, so you want to be careful with this.
In case you use Spring Test try org.springframework.test.util.ReflectionTestUtils
ReflectionTestUtils.setField(testObject, "person", mockedPerson);
After having tried for over two hours, I can safely say that all the method mentioned so far don't work across browsers, or for IE even across browser versions...
For example (top upvoted answer):
filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083); /* IE6,IE7 */
-ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083)"; /* IE8 */
rotates twice in IE9, once for filter, and once for -ms-filter, so...
All other mentioned methods do not work either, at least not if you have to set no fixed height/width of the table header cell (with background color), where it should automatically adjust to size of the highest element.
So to elaborate on the server-side image generation proposed by Nathan Long, which is really the only universially working method, here my VB.NET code for a generic handler (*.ashx ):
Imports System.Web
Imports System.Web.Services
Public Class GenerateImage
Implements System.Web.IHttpHandler
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
'context.Response.ContentType = "text/plain"
'context.Response.Write("Hello World!")
context.Response.ContentType = "image/png"
Dim strText As String = context.Request.QueryString("text")
Dim strRotate As String = context.Request.QueryString("rotate")
Dim strBGcolor As String = context.Request.QueryString("bgcolor")
Dim bRotate As Boolean = True
If String.IsNullOrEmpty(strText) Then
strText = "No Text"
End If
Try
If Not String.IsNullOrEmpty(strRotate) Then
bRotate = System.Convert.ToBoolean(strRotate)
End If
Catch ex As Exception
End Try
'Dim img As System.Drawing.Image = GenerateImage(strText, "Arial", bRotate)
'Dim img As System.Drawing.Image = CreateBitmapImage(strText, bRotate)
' Generic error in GDI+
'img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png)
'Dim bm As System.Drawing.Bitmap = New System.Drawing.Bitmap(img)
'bm.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png)
Using msTempOutputStream As New System.IO.MemoryStream
'Dim img As System.Drawing.Image = GenerateImage(strText, "Arial", bRotate)
Using img As System.Drawing.Image = CreateBitmapImage(strText, bRotate, strBGcolor)
img.Save(msTempOutputStream, System.Drawing.Imaging.ImageFormat.Png)
msTempOutputStream.Flush()
context.Response.Buffer = True
context.Response.ContentType = "image/png"
context.Response.BinaryWrite(msTempOutputStream.ToArray())
End Using ' img
End Using ' msTempOutputStream
End Sub ' ProcessRequest
Private Function CreateBitmapImage(strImageText As String) As System.Drawing.Image
Return CreateBitmapImage(strImageText, True)
End Function ' CreateBitmapImage
Private Function CreateBitmapImage(strImageText As String, bRotate As Boolean) As System.Drawing.Image
Return CreateBitmapImage(strImageText, bRotate, Nothing)
End Function
Private Function InvertMeAColour(ColourToInvert As System.Drawing.Color) As System.Drawing.Color
Const RGBMAX As Integer = 255
Return System.Drawing.Color.FromArgb(RGBMAX - ColourToInvert.R, RGBMAX - ColourToInvert.G, RGBMAX - ColourToInvert.B)
End Function
Private Function CreateBitmapImage(strImageText As String, bRotate As Boolean, strBackgroundColor As String) As System.Drawing.Image
Dim bmpEndImage As System.Drawing.Bitmap = Nothing
If String.IsNullOrEmpty(strBackgroundColor) Then
strBackgroundColor = "#E0E0E0"
End If
Dim intWidth As Integer = 0
Dim intHeight As Integer = 0
Dim bgColor As System.Drawing.Color = System.Drawing.Color.LemonChiffon ' LightGray
bgColor = System.Drawing.ColorTranslator.FromHtml(strBackgroundColor)
Dim TextColor As System.Drawing.Color = System.Drawing.Color.Black
TextColor = InvertMeAColour(bgColor)
'TextColor = Color.FromArgb(102, 102, 102)
' Create the Font object for the image text drawing.
Using fntThisFont As New System.Drawing.Font("Arial", 11, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Pixel)
' Create a graphics object to measure the text's width and height.
Using bmpInitialImage As New System.Drawing.Bitmap(1, 1)
Using gStringMeasureGraphics As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(bmpInitialImage)
' This is where the bitmap size is determined.
intWidth = CInt(gStringMeasureGraphics.MeasureString(strImageText, fntThisFont).Width)
intHeight = CInt(gStringMeasureGraphics.MeasureString(strImageText, fntThisFont).Height)
' Create the bmpImage again with the correct size for the text and font.
bmpEndImage = New System.Drawing.Bitmap(bmpInitialImage, New System.Drawing.Size(intWidth, intHeight))
' Add the colors to the new bitmap.
Using gNewGraphics As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(bmpEndImage)
' Set Background color
'gNewGraphics.Clear(Color.White)
gNewGraphics.Clear(bgColor)
gNewGraphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias
gNewGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias
''''
'gNewGraphics.TranslateTransform(bmpEndImage.Width, bmpEndImage.Height)
'gNewGraphics.RotateTransform(180)
'gNewGraphics.RotateTransform(0)
'gNewGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SystemDefault
gNewGraphics.DrawString(strImageText, fntThisFont, New System.Drawing.SolidBrush(TextColor), 0, 0)
gNewGraphics.Flush()
If bRotate Then
'bmpEndImage = rotateImage(bmpEndImage, 90)
'bmpEndImage = RotateImage(bmpEndImage, New PointF(0, 0), 90)
'bmpEndImage.RotateFlip(RotateFlipType.Rotate90FlipNone)
bmpEndImage.RotateFlip(System.Drawing.RotateFlipType.Rotate270FlipNone)
End If ' bRotate
End Using ' gNewGraphics
End Using ' gStringMeasureGraphics
End Using ' bmpInitialImage
End Using ' fntThisFont
Return bmpEndImage
End Function ' CreateBitmapImage
' http://msdn.microsoft.com/en-us/library/3zxbwxch.aspx
' http://msdn.microsoft.com/en-us/library/7e1w5dhw.aspx
' http://www.informit.com/guides/content.aspx?g=dotnet&seqNum=286
' http://road-blogs.blogspot.com/2011/01/rotate-text-in-ssrs.html
Public Shared Function GenerateImage_CrappyOldReportingServiceVariant(ByVal strText As String, ByVal strFont As String, bRotate As Boolean) As System.Drawing.Image
Dim bgColor As System.Drawing.Color = System.Drawing.Color.LemonChiffon ' LightGray
bgColor = System.Drawing.ColorTranslator.FromHtml("#E0E0E0")
Dim TextColor As System.Drawing.Color = System.Drawing.Color.Black
'TextColor = System.Drawing.Color.FromArgb(255, 0, 0, 255)
If String.IsNullOrEmpty(strFont) Then
strFont = "Arial"
Else
If strFont.Trim().Equals(String.Empty) Then
strFont = "Arial"
End If
End If
'Dim fsFontStyle As System.Drawing.FontStyle = System.Drawing.FontStyle.Regular
Dim fsFontStyle As System.Drawing.FontStyle = System.Drawing.FontStyle.Bold
Dim fontFamily As New System.Drawing.FontFamily(strFont)
Dim iFontSize As Integer = 8 '//Change this as needed
' vice-versa, because 270° turn
'Dim height As Double = 2.25
Dim height As Double = 4
Dim width As Double = 1
' width = 10
' height = 10
Dim bmpImage As New System.Drawing.Bitmap(1, 1)
Dim iHeight As Integer = CInt(height * 0.393700787 * bmpImage.VerticalResolution) 'y DPI
Dim iWidth As Integer = CInt(width * 0.393700787 * bmpImage.HorizontalResolution) 'x DPI
bmpImage = New System.Drawing.Bitmap(bmpImage, New System.Drawing.Size(iWidth, iHeight))
'// Create the Font object for the image text drawing.
'Dim MyFont As New System.Drawing.Font("Arial", iFontSize, fsFontStyle, System.Drawing.GraphicsUnit.Point)
'// Create a graphics object to measure the text's width and height.
Dim MyGraphics As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(bmpImage)
MyGraphics.Clear(bgColor)
Dim stringFormat As New System.Drawing.StringFormat()
stringFormat.FormatFlags = System.Drawing.StringFormatFlags.DirectionVertical
'stringFormat.FormatFlags = System.Drawing.StringFormatFlags.DirectionVertical Or System.Drawing.StringFormatFlags.DirectionRightToLeft
Dim solidBrush As New System.Drawing.SolidBrush(TextColor)
Dim pointF As New System.Drawing.PointF(CSng(iWidth / 2 - iFontSize / 2 - 2), 5)
Dim font As New System.Drawing.Font(fontFamily, iFontSize, fsFontStyle, System.Drawing.GraphicsUnit.Point)
MyGraphics.TranslateTransform(bmpImage.Width, bmpImage.Height)
MyGraphics.RotateTransform(180)
MyGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SystemDefault
MyGraphics.DrawString(strText, font, solidBrush, pointF, stringFormat)
MyGraphics.ResetTransform()
MyGraphics.Flush()
'If Not bRotate Then
'bmpImage.RotateFlip(System.Drawing.RotateFlipType.Rotate90FlipNone)
'End If
Return bmpImage
End Function ' GenerateImage
ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property ' IsReusable
End Class
Note that if you think that this part
Using msTempOutputStream As New System.IO.MemoryStream
'Dim img As System.Drawing.Image = GenerateImage(strText, "Arial", bRotate)
Using img As System.Drawing.Image = CreateBitmapImage(strText, bRotate, strBGcolor)
img.Save(msTempOutputStream, System.Drawing.Imaging.ImageFormat.Png)
msTempOutputStream.Flush()
context.Response.Buffer = True
context.Response.ContentType = "image/png"
context.Response.BinaryWrite(msTempOutputStream.ToArray())
End Using ' img
End Using ' msTempOutputStream
can be replaced with
img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png)
because it works on the development server, then you are sorely mistaken to assume the very same code wouldn't throw a Generic GDI+ exception if you deploy it to a Windows 2003 IIS 6 server...
then use it like this:
<img alt="bla" src="GenerateImage.ashx?no_cache=123&text=Hello%20World&rotate=true" />
You may want to have a look at https://isocpp.org/wiki/faq/pointers-to-members#fnptr-vs-memfnptr-types, especially [33.1] Is the type of "pointer-to-member-function" different from "pointer-to-function"?
doesnt directly answer your question. But helpful for those who want to start something after some time.
Future.delayed(Duration(seconds: 1), () {
print('yo hey');
});
Use dbms_lob.instr and dbms_lob.substr, just like regular InStr and SubstStr functions.
Look at simple example:
SQL> create table t_clob(
2 id number,
3 cl clob
4 );
Tabela zosta¦a utworzona.
SQL> insert into t_clob values ( 1, ' xxxx abcd xyz qwerty 354657 [] ' );
1 wiersz zosta¦ utworzony.
SQL> declare
2 i number;
3 begin
4 for i in 1..400 loop
5 update t_clob set cl = cl || ' xxxx abcd xyz qwerty 354657 [] ';
6 end loop;
7 update t_clob set cl = cl || ' CALCULATION=[N]NEW.PRODUCT_NO=[T9856] OLD.PRODUCT_NO=[T9852].... -- with other text ';
8 for i in 1..400 loop
9 update t_clob set cl = cl || ' xxxx abcd xyz qwerty 354657 [] ';
10 end loop;
11 end;
12 /
Procedura PL/SQL zosta¦a zako?czona pomytlnie.
SQL> commit;
Zatwierdzanie zosta¦o uko?czone.
SQL> select length( cl ) from t_clob;
LENGTH(CL)
----------
25717
SQL> select dbms_lob.instr( cl, 'NEW.PRODUCT_NO=[' ) from t_clob;
DBMS_LOB.INSTR(CL,'NEW.PRODUCT_NO=[')
-------------------------------------
12849
SQL> select dbms_lob.substr( cl, 5,dbms_lob.instr( cl, 'NEW.PRODUCT_NO=[' ) + length( 'NEW.PRODUCT_NO=[') ) new_product
2 from t_clob;
NEW_PRODUCT
--------------------------------------------------------------------------------
T9856
I had a simular issue and resolved it using android:adjustViewBounds="true"
on the ImageView.
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:contentDescription="@string/banner_alt"
android:src="@drawable/banner_portrait" />
In my case of using ViewPager 2 alpha 2 the below snippet works
viewPager.isUserInputEnabled = false
Ability to disable user input (setUserInputEnabled, isUserInputEnabled)
refer to this for more changes in viewpager2 1.0.0-alpha02
Also some changes were made latest version ViewPager 2 alpha 4
orientation and isUserScrollable attributes are no longer part of SavedState
refer to this for more changes in viewpager2#1.0.0-alpha04
You can make rounded border with width of border of any control in this way:-
CALayer * l1 = [lblName layer];
[l1 setMasksToBounds:YES];
[l1 setCornerRadius:5.0];
// You can even add a border
[l1 setBorderWidth:5.0];
[l1 setBorderColor:[[UIColor darkGrayColor] CGColor]];
Just replace lblName
with your UILabel
.
Note:- Don't forget to import <QuartzCore/QuartzCore.h>
While working in a big project which has complex build system and where it is hard to get (or modify) the gcc/g++ command directly there is another way to see the result of macro expansion. Simply redefine the macro, and you will get output similiar to following:
file.h: note: this is the location of the previous definition
#define MACRO current_value
Unfortunately, I didn't find function something like Boolean.ParseBool('true') which returns true as Boolean type like in C#. So workaround is
var setActive = 'true';
setActive = setActive == "true";
if(setActive)
// statements
else
// statements.
To get the directory, you can use the code below:
File cacheDir = new File(Environment.getExternalStorageDirectory() + File.separator + "");
In my case, jvmTarget was already set in build.gradle
file as below.
tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
kotlinOptions {
jvmTarget = "1.8"
}
}
But my issue was still there. Finally, it gets resolved after Changing Target JVM version from 1.6 to 1.8 in Preferences > Other Settings > Kotlin Compiler > Target JVM version. see attached picture,
Try this:
var value;
for (var key in dictionary) {
value = dictionary[key];
// your code here...
}
One use of reinterpret_cast is if you want to apply bitwise operations to (IEEE 754) floats. One example of this was the Fast Inverse Square-Root trick:
https://en.wikipedia.org/wiki/Fast_inverse_square_root#Overview_of_the_code
It treats the binary representation of the float as an integer, shifts it right and subtracts it from a constant, thereby halving and negating the exponent. After converting back to a float, it's subjected to a Newton-Raphson iteration to make this approximation more exact:
float Q_rsqrt( float number )
{
long i;
float x2, y;
const float threehalfs = 1.5F;
x2 = number * 0.5F;
y = number;
i = * ( long * ) &y; // evil floating point bit level hacking
i = 0x5f3759df - ( i >> 1 ); // what the deuce?
y = * ( float * ) &i;
y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
// y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed
return y;
}
This was originally written in C, so uses C casts, but the analogous C++ cast is the reinterpret_cast.
You can implement MVC in Android, but it is not "natively supported" and takes some effort.
That said, I personally tend towards MVP as a much cleaner architectural pattern for Android development. And by saying MVP I mean this:
I have also posted a more detailed answer here.
After playing with the various approaches to MVC/MVP implementation in Android, I came up with a reasonable architectural pattern, which I described in a this post: MVP and MVC Architectural Patterns in Android.
To dump your database for backup you call this command on your terminal
mongodump --db database_name --collection collection_name
To import your backup file to mongodb you can use the following command on your terminal
mongorestore --db database_name path_to_bson_file
Make sure all services windows are closed before starting install/uninstall
html:
<h4 data-toggle-selector="#me">toggle</h4>
<div id="me">content here</div>
js:
$(function () {
$('[data-toggle-selector]').on('click',function () {
$($(this).data('toggle-selector')).toggle(300);
})
})
The simplest way that doesn't require third party libraries it to create a URL object and then call either openConnection or openStream on it. Note that this is a pretty basic API, so you won't have a lot of control over the headers.
The OP didn't actually need to pivot without agregation but for those of you coming here to know how see:
The answer to that question involves a situation where pivot without aggregation is needed so an example of doing it is part of the solution.
Edit: For newer versions of Git, --set-upstream master
has been deprecated, you should use --set-upstream-to
instead:
git branch --set-upstream-to=origin/master master
As it prompted, you can just run:
git branch --set-upstream master origin/master
After that, you can simply run git pull
to update your code.
I solved the problem by following the instructions on msdn.microsoft.com more closely. There, it is stated that one must create the new macro by selecting Developer -> Macros, typing a new macro name, and clicking "Create". Creating the macro in this way, I was able to run it (see message box below).
In one line, but first import IO
import pandas as pd
import io
TESTDATA="""col1;col2;col3
1;4.4;99
2;4.5;200
3;4.7;65
4;3.2;140
"""
df = pd.read_csv( io.StringIO(TESTDATA) , sep=";")
print ( df )
Getting the Text of ComboBox when the item is changed
self.ui.comboBox.activated.connect(self.pass_Net_Adap)
def pass_Net_Adap(self):
print str(self.ui.comboBox.currentText())
Use a class.
Edit: Better example
class StarshipType
{
private string _Name;
private static List<StarshipType> _StarshipTypes = new List<StarshipType>();
public static readonly StarshipType Ultralight = new StarshipType("Ultralight");
public static readonly StarshipType Light = new StarshipType("Light");
public static readonly StarshipType Mediumweight = new StarshipType("Mediumweight");
public static readonly StarshipType Heavy = new StarshipType("Heavy");
public static readonly StarshipType Superheavy = new StarshipType("Superheavy");
public string Name
{
get { return _Name; }
private set { _Name = value; }
}
public static IList<StarshipType> StarshipTypes
{
get { return _StarshipTypes; }
}
private StarshipType(string name, int systemRatio)
{
Name = name;
_StarshipTypes.Add(this);
}
public static StarshipType Parse(string toParse)
{
foreach (StarshipType s in StarshipTypes)
{
if (toParse == s.Name)
return s;
}
throw new FormatException("Could not parse string.");
}
}
I've found that the parent of a UserControl is always null in the constructor, but in any event handlers the parent is set correctly. I guess it must have something to do with the way the control tree is loaded. So to get around this you can just get the parent in the controls Loaded event.
For an example checkout this question WPF User Control's DataContext is Null
If you have applied border and/or fill on a cell, you need to clear both to go back to the default borders.
You may apply 'None' as the border option and expect the default borders to show, but it will not when the cell fill is white. It's not immediately obvious that it has a white fill, as unfilled cells are also white.
In this case, apply a 'No Fill' on the cells, and you will get the default borders back.
That's it. No messy format painting, no 'Clear Formats', none of those destructive methods. Easy, quick and painless.
I thought the question was "Move cursor to end of file in vim" ?
End-of-file: Esc + G
Begin-of-file Esc + g (or gg
if you are already in the command area)
Yes, views can have a clustered index assigned and, when they do, they'll store temporary results that can speed up resulting queries.
Update: At least three people have voted me down on this one. With all due respect, I think that they are just wrong; Microsoft's own documentation makes it very clear that Views can improve performance.
First, simple views are expanded in place and so do not directly contribute to performance improvements - that much is true. However, indexed views can dramatically improve performance.
Let me go directly to the documentation:
After a unique clustered index is created on the view, the view's result set is materialized immediately and persisted in physical storage in the database, saving the overhead of performing this costly operation at execution time.
Second, these indexed views can work even when they are not directly referenced by another query as the optimizer will use them in place of a table reference when appropriate.
Again, the documentation:
The indexed view can be used in a query execution in two ways. The query can reference the indexed view directly, or, more importantly, the query optimizer can select the view if it determines that the view can be substituted for some or all of the query in the lowest-cost query plan. In the second case, the indexed view is used instead of the underlying tables and their ordinary indexes. The view does not need to be referenced in the query for the query optimizer to use it during query execution. This allows existing applications to benefit from the newly created indexed views without changing those applications.
This documentation, as well as charts demonstrating performance improvements, can be found here.
Update 2: the answer has been criticized on the basis that it is the "index" that provides the performance advantage, not the "View." However, this is easily refuted.
Let us say that we are a software company in a small country; I'll use Lithuania as an example. We sell software worldwide and keep our records in a SQL Server database. We're very successful and so, in a few years, we have 1,000,000+ records. However, we often need to report sales for tax purposes and we find that we've only sold 100 copies of our software in our home country. By creating an indexed view of just the Lithuanian records, we get to keep the records we need in an indexed cache as described in the MS documentation. When we run our reports for Lithuanian sales in 2008, our query will search through an index with a depth of just 7 (Log2(100) with some unused leaves). If we were to do the same without the VIEW and just relying on an index into the table, we'd have to traverse an index tree with a search depth of 21!
Clearly, the View itself would provide us with a performance advantage (3x) over the simple use of the index alone. I've tried to use a real-world example but you'll note that a simple list of Lithuanian sales would give us an even greater advantage.
Note that I'm just using a straight b-tree for my example. While I'm fairly certain that SQL Server uses some variant of a b-tree, I don't know the details. Nonetheless, the point holds.
Update 3: The question has come up about whether an Indexed View just uses an index placed on the underlying table. That is, to paraphrase: "an indexed view is just the equivalent of a standard index and it offers nothing new or unique to a view." If this was true, of course, then the above analysis would be incorrect! Let me provide a quote from the Microsoft documentation that demonstrate why I think this criticism is not valid or true:
Using indexes to improve query performance is not a new concept; however, indexed views provide additional performance benefits that cannot be achieved using standard indexes.
Together with the above quote regarding the persistence of data in physical storage and other information in the documentation about how indices are created on Views, I think it is safe to say that an Indexed View is not just a cached SQL Select that happens to use an index defined on the main table. Thus, I continue to stand by this answer.
To create a new line, symbol is '\n'
var i;
for(i=10; i>=0; i= i-1){
var s;
for(s=0; s<i; s = s+1){
document.write("*");
}
//i want this to print a new line
document.write('\n');
}
If you are outputting to the page, you'll want to use "<br/>"
instead of '/n'
;
My understanding is this:
I just had the same issue and this helped me:
html {
height: auto;
min-height: 100%;
background-size:cover;
}
Another option:
if( ![string]::IsNullOrEmpty($user_sam) -and ![string]::IsNullOrEmpty($user_case) )
{
...
}
If you have LWP installed, it provides a binary simply named "GET".
$ GET http://example.com <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML> <HEAD> <META http-equiv="Content-Type" content="text/html; charset=utf-8"> <TITLE>Example Web Page</TITLE> </HEAD> <body> <p>You have reached this web page by typing "example.com", "example.net","example.org" or "example.edu" into your web browser.</p> <p>These domain names are reserved for use in documentation and are not available for registration. See <a href="http://www.rfc-editor.org/rfc/rfc2606.txt">RFC 2606</a>, Section 3.</p> </BODY> </HTML>
wget -O-
, curl
, and lynx -source
behave similarly.
This is not an answer to your original question: "Appending output of a Batch file To log file?"
For reference, it's an answer to your followup question: "What lines should i add to my batch file which will make it execute after every 30mins?"
(But I would take Jon Skeet's advice: "You probably shouldn't do that in your batch file - instead, use Task Scheduler.")
Timeout:
Example (1 second):
TIMEOUT /T 1000 /NOBREAK
Sleep:
Example (1 second):
sleep -m 1000
Alternative methods:
Here's an answer to your 2nd followup question: "Along with the Timestamp?"
Create a date and time stamp in your batch files
Example:
echo *** Date: %DATE:/=-% and Time:%TIME::=-% *** >> output.log
You can't instantiate a date object any way you want. It has to be in a specific way. Here are some valid examples:
new Date() // current date and time
new Date(milliseconds) //milliseconds since 1970/01/01
new Date(dateString)
new Date(year, month, day, hours, minutes, seconds, milliseconds)
or
d1 = new Date("October 13, 1975 11:13:00")
d2 = new Date(79,5,24)
d3 = new Date(79,5,24,11,33,0)
Chrome must just be more flexible.
Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date
From apsillers comment:
the EMCAScript specification requires exactly one date format (i.e., YYYY-MM-DDTHH:mm:ss.sssZ) but custom date formats may be freely supported by an implementation: "If the String does not conform to that [ECMAScript-defined] format the function may fall back to any implementation-specific heuristics or implementation-specific date formats." Chrome and FF simply have different "implementation-specific date formats."
And this should work as well..
ConcurrentMap<Integer, String> running = ... create and populate map
Set<Entry<Integer, String>> set = running.entrySet();
for (Entry<Integer, String> entry : set)
{
if (entry.getKey()>600000)
{
set.remove(entry.getKey());
}
}
Acknowledging this as an older post but still figured I'd add this suggestion to the list of responses since I hadn't seen it mentioned.
If the unresolved reference exists within context of another Project in the Solution:
Right-click the Project having the problem, select Build Dependencies --> Project Dependencies and ensure the desired Project is selected for reference.
I had the same issue as described in the post however none of the suggested manners for resolution worked. I'd never seen such a quirk in VS before (running VS 2019 at present)
I checked for potential namespace issues and a plethora of the more obvious causes and nothing made sense. Intellisense even acknowledged the existence of the other Project and suggested to a the using statement but even after having added the using reference; VS 2019 still wouldn't acknowledge the other project.
Forcing the dependency in the manner described resolved the issue.
Safer is to use lift
so you can extract the value if it exists and fail gracefully if it does not.
data.lift(2)
This will return None if the list isn't long enough to provide that element, and Some(value) if it is.
scala> val l = List("a", "b", "c")
scala> l.lift(1)
Some("b")
scala> l.lift(5)
None
Whenever you're performing an operation that may fail in this way it's great to use an Option and get the type system to help make sure you are handling the case where the element doesn't exist.
Explanation:
This works because List's apply
(which sugars to just parentheses, e.g. l(index)
) is like a partial function that is defined wherever the list has an element. The List.lift
method turns the partial apply
function (a function that is only defined for some inputs) into a normal function (defined for any input) by basically wrapping the result in an Option.
Simplest of all solutions:
filtered_df = df[df['var2'].isnull()]
This filters and gives you rows which has only NaN
values in 'var2'
column.
I had the same issue and none of the above answers fixed it for me because my env variables were all set. I had just reinstalled my Java.
What worked was to
C:\path\to\apache-maven-3.0.4\bin
and open the mvn.bat
file.@SET JAVA_HOME=C:\progra~1\java\jdk1.7.0_03
I don't know if this is Windows specific, but it might help someone!
results.show(20, False)
or results.show(20, false)
depending on whether you are running it on Java/Scala/Python
In GVIM, The file can be browsed using open / read / write dialog;
:browse {command}
{command} - open / read / write
open - Opens the file read - Appends the file write - SaveAs dialog
I used purgatory101's answer but had trouble keeping all colours (icons, backgrounds, text colours etc...), especially that CSS stylesheets cannot be used with libraries which dynamically change DOM element's colours. Therefore here is a script that changes element's styles (background-colour
and colour
) before printing and clears styles once printing is done. It is useful to avoid writing a lot of CSS in a @media print
stylesheet as it works whatever the page structure.
There is a part of the script that is specially made to keep FontAwesome icons color (or any element that uses a :before
selector to insert coloured content).
JSFiddle showing the script in action
Compatibility: works in Chrome, I did not test other browsers.
function setColors(selector) {
var elements = $(selector);
for (var i = 0; i < elements.length; i++) {
var eltBackground = $(elements[i]).css('background-color');
var eltColor = $(elements[i]).css('color');
var elementStyle = elements[i].style;
if (eltBackground) {
elementStyle.oldBackgroundColor = {
value: elementStyle.backgroundColor,
importance: elementStyle.getPropertyPriority('background-color'),
};
elementStyle.setProperty('background-color', eltBackground, 'important');
}
if (eltColor) {
elementStyle.oldColor = {
value: elementStyle.color,
importance: elementStyle.getPropertyPriority('color'),
};
elementStyle.setProperty('color', eltColor, 'important');
}
}
}
function resetColors(selector) {
var elements = $(selector);
for (var i = 0; i < elements.length; i++) {
var elementStyle = elements[i].style;
if (elementStyle.oldBackgroundColor) {
elementStyle.setProperty('background-color', elementStyle.oldBackgroundColor.value, elementStyle.oldBackgroundColor.importance);
delete elementStyle.oldBackgroundColor;
} else {
elementStyle.setProperty('background-color', '', '');
}
if (elementStyle.oldColor) {
elementStyle.setProperty('color', elementStyle.oldColor.value, elementStyle.oldColor.importance);
delete elementStyle.oldColor;
} else {
elementStyle.setProperty('color', '', '');
}
}
}
function setIconColors(icons) {
var css = '';
$(icons).each(function (k, elt) {
var selector = $(elt)
.parents()
.map(function () { return this.tagName; })
.get()
.reverse()
.concat([this.nodeName])
.join('>');
var id = $(elt).attr('id');
if (id) {
selector += '#' + id;
}
var classNames = $(elt).attr('class');
if (classNames) {
selector += '.' + $.trim(classNames).replace(/\s/gi, '.');
}
css += selector + ':before { color: ' + $(elt).css('color') + ' !important; }';
});
$('head').append('<style id="print-icons-style">' + css + '</style>');
}
function resetIconColors() {
$('#print-icons-style').remove();
}
And then modify the window.print
function to make it set the styles before printing and resetting them after.
window._originalPrint = window.print;
window.print = function() {
setColors('body *');
setIconColors('body .fa');
window._originalPrint();
setTimeout(function () {
resetColors('body *');
resetIconColors();
}, 100);
}
The part that finds icons paths to create CSS for :before elements is a copy from this SO answer
This will never work, because the JS VM has moved on from that async_call and returned the value, which you haven't set yet.
Don't try to fight what is natural and built-in the language behaviour. You should use a callback technique or a promise.
function f(input, callback) {
var value;
// Assume the async call always succeed
async_call(input, function(result) { callback(result) };
}
The other option is to use a promise, have a look at Q. This way you return a promise, and then you attach a then listener to it, which is basically the same as a callback. When the promise resolves, the then will trigger.
An easy way would be to use $toLower as below.
db.users.aggregate([
{
$project: {
name: { $toLower: "$name" }
}
},
{
$match: {
name: the_name_to_search
}
}
])
Reinstall the dependencies. Remove the vendor folder (manually) or via rm command (if you are in the project folder, sure) on Linux before:
rm -rf vendor/
composer update -v
Possibly this can be of great help for you.
div.image
{
width:500px;
height:250px;
border:2px solid;
border-color:#CD853F;
}
div.box
{
width:400px;
height:180px;
margin:30px 50px;
background-color:#ffffff;
border:1px solid;
border-color:#CD853F;
opacity:0.6;
filter:alpha(opacity=60);
}
div.box p
{
margin:30px 40px;
font-weight:bold;
color:#CD853F;
}
Check this link once.
These properties in spring boot application.properties makes the acceptable file size unlimited -
# To prevent maximum upload size limit exception
spring.servlet.multipart.max-file-size=-1
spring.servlet.multipart.max-request-size=-1
There is a way to perform URL validation in strict accordance to standards in Java without resorting to third-party libraries:
boolean isValidURL(String url) {
try {
new URI(url).parseServerAuthority();
return true;
} catch (URISyntaxException e) {
return false;
}
}
The constructor of URI
checks that url
is a valid URI, and the call to parseServerAuthority
ensures that it is a URL (absolute or relative) and not a URN.
Use itext libray:
Here is the sample code. It is working perfectly fine:
String htmlFilePath = filePath + ".html";
String pdfFilePath = filePath + ".pdf";
// create an html file on given file path
Writer unicodeFileWriter = new OutputStreamWriter(new FileOutputStream(htmlFilePath), "UTF-8");
unicodeFileWriter.write(document.toString());
unicodeFileWriter.close();
ConverterProperties properties = new ConverterProperties();
properties.setCharset("UTF-8");
if (url.contains(".kr") || url.contains(".tw") || url.contains(".cn") || url.contains(".jp")) {
properties.setFontProvider(new DefaultFontProvider(false, false, true));
}
// convert the html file to pdf file.
HtmlConverter.convertToPdf(new File(htmlFilePath), new File(pdfFilePath), properties);
Maven dependencies
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext7-core</artifactId>
<version>7.1.6</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>html2pdf</artifactId>
<version>2.1.3</version>
</dependency>
The other answers here are excellent and accurate. In the interest of adding to the list of things to try:
Double and triple-check that your app is using the right application ID and secret key. In my case, after trying many other things, I checked the application ID and secret key and found that I was using our production settings on our development system. Doh!
Using the correct application ID and secret key fixed the problem.
Another small point: If you used the import some_module as sm
syntax, then you have to re-load the module with its aliased name (sm
in this example):
>>> import some_module as sm
...
>>> import importlib
>>> importlib.reload(some_module) # raises "NameError: name 'some_module' is not defined"
>>> importlib.reload(sm) # works
Can someone please tell me how to create a static library from a .cpp and a .hpp file? Do I need to create the .o and the the .a?
Yes.
Create the .o (as per normal):
g++ -c header.cpp
Create the archive:
ar rvs header.a header.o
Test:
g++ test.cpp header.a -o executable_name
Note that it seems a bit pointless to make an archive with just one module in it. You could just as easily have written:
g++ test.cpp header.cpp -o executable_name
Still, I'll give you the benefit of the doubt that your actual use case is a bit more complex, with more modules.
Hope this helps!
There are method join
for string objects:
".".join(("a","b","c"))
find
supports -delete
operation, so:
find /base/dir/* -ctime +10 -delete;
I think there's a catch that the files need to be 10+ days older too. Haven't tried, someone may confirm in comments.
The most voted solution here is missing -maxdepth 0
so it will call rm -rf
for every subdirectory, after deleting it. That doesn't make sense, so I suggest:
find /base/dir/* -maxdepth 0 -type d -ctime +10 -exec rm -rf {} \;
The -delete
solution above doesn't use -maxdepth 0
because find
would complain the dir is not empty. Instead, it implies -depth
and deletes from the bottom up.
You can stash
(save the changes in temporary box) then, back to master
branch HEAD.
$ git add .
$ git stash
$ git checkout master
Jump Over Commits Back and Forth:
Go to a specific commit-sha
.
$ git checkout <commit-sha>
If you have uncommitted changes here then, you can checkout to a new branch | Add | Commit | Push the current branch to the remote.
# checkout a new branch, add, commit, push
$ git checkout -b <branch-name>
$ git add .
$ git commit -m 'Commit message'
$ git push origin HEAD # push the current branch to remote
$ git checkout master # back to master branch now
If you have changes in the specific commit and don't want to keep the changes, you can do stash
or reset
then checkout to master
(or, any other branch).
# stash
$ git add -A
$ git stash
$ git checkout master
# reset
$ git reset --hard HEAD
$ git checkout master
After checking out a specific commit if you have no uncommitted change(s) then, just back to master
or other
branch.
$ git status # see the changes
$ git checkout master
# or, shortcut
$ git checkout - # back to the previous state
None of the above worked for me - the problem lay in my Sourcetree Preferences. In the Network tab, I had a setting there for 'Default usernames for URLs which do not include one:'. The username was incorrect where I had entered it incorrectly previously - I had set it to my email rather than username. I highlighted the entries and clicked Remove for both. Then I returned to my repository page and clicked Push again. On pushing, it asked me for full username and password, which I was able to enter correctly - the push then finally worked.
This will do:
#include <fstream>
#include <iostream>
using std::fstream;
int main(int argc, char *argv[]) {
fstream file;
file.open("test.txt",std::ios::out);
file << fflush;
file.close();
}
I created the jQuery plugin, SelectBoxIt, a couple of days ago. It tries to mimic the behavior of a regular HTML select box, but also allows you to style and animate the select box using jQueryUI. Take a look and let me know what you think.
You should type this command with flag -f (force):
sudo docker volume rm -f <VOLUME NAME>
UTF-8 is a superset of ASCII. Either your UTF-8 file is ASCII, or it can't be converted without loss.
Your application has an AppCompat theme
<application
android:theme="@style/AppTheme">
But, you overwrote the Activity (which extends AppCompatActivity) with a theme that isn't descendant of an AppCompat theme
<activity android:name=".MainActivity"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
You could define your own fullscreen theme like so (notice AppCompat
in the parent=
)
<style name="AppFullScreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>
Then set that on the Activity.
<activity android:name=".MainActivity"
android:theme="@style/AppFullScreenTheme" >
Note: There might be an AppCompat theme that's already full screen, but don't know immediately
As far as I know there is nothing directly addressing your request - but I can suggest a proposal that could help:
You could use your own test annotation that is a meta annotation comprising @SpringBootTest
and @ActiveProfiles("test")
. So you still need the dedicated profile but avoid scattering the profile definition across all your test.
This annotation will default to the profile test
and you can override the profile using the meta annotation.
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@SpringBootTest
@ActiveProfiles
public @interface MyApplicationTest {
@AliasFor(annotation = ActiveProfiles.class, attribute = "profiles") String[] activeProfiles() default {"test"};
}
It can also happen when your parameters are wrong in the request. In my case I was working with a API that sent me the message
"No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. The response had HTTP status code 401."
when I send wrong username or password with the POST request to login.
Just spent a good few days trying to get this to work on High Sierra 10.13.1. The gdb 8.1 version from homebrew would not work no matter what I tried. Ended up installing gdb 8.0.1 via macports and this miraculously worked (after jumping through all of the other necessary hoops related to codesigning etc).
One additional issue is that in Eclipse you will get extraneous single quotes around all of your program arguments which can be worked around by providing the arguments inside .gdbinit instead.
You can also do this with pandas by broadcasting your columns as categories first, e.g. dtype="category"
e.g.
cats = ['client', 'hotel', 'currency', 'ota', 'user_country']
df[cats] = df[cats].astype('category')
and then calling describe
:
df[cats].describe()
This will give you a nice table of value counts and a bit more :):
client hotel currency ota user_country
count 852845 852845 852845 852845 852845
unique 2554 17477 132 14 219
top 2198 13202 USD Hades US
freq 102562 8847 516500 242734 340992
You can truncate the date part:
select * from table1 where trunc(field1) = to_date('2012-01-01', 'YYYY-MM-DD')
The trouble with this approach is that any index on field1
wouldn't be used due to the function call.
Alternatively (and more index friendly)
select * from table1
where field1 >= to_timestamp('2012-01-01', 'YYYY-MM-DD')
and field1 < to_timestamp('2012-01-02', 'YYYY-MM-DD')
From the link Jweede posted:
exception socket.timeout:
This exception is raised when a timeout occurs on a socket which has had timeouts enabled via a prior call to settimeout(). The accompanying value is a string whose value is currently always “timed out”.
Here are the demo server and client programs for the socket module from the python docs
# Echo server program
import socket
HOST = '' # Symbolic name meaning all available interfaces
PORT = 50007 # Arbitrary non-privileged port
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
data = conn.recv(1024)
if not data: break
conn.send(data)
conn.close()
And the client:
# Echo client program
import socket
HOST = 'daring.cwi.nl' # The remote host
PORT = 50007 # The same port as used by the server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.send('Hello, world')
data = s.recv(1024)
s.close()
print 'Received', repr(data)
On the docs example page I pulled these from, there are more complex examples that employ this idea, but here is the simple answer:
Assuming you're writing the client program, just put all your code that uses the socket when it is at risk of being dropped, inside a try block...
try:
s.connect((HOST, PORT))
s.send("Hello, World!")
...
except socket.timeout:
# whatever you need to do when the connection is dropped
Please use the below code
string.Format("{0}://{1}", Request.url.Scheme, Request.url.Host);
I came across the situation where I met a condition that broke the loop, however the code after the .each() function still executed. I then set a flag to "true" with an immediate check for the flag after the .each() function to ensure the code that followed was not executed.
$('.groupName').each(function() {
if($(this).text() == groupname){
alert('This group already exists');
breakOut = true;
return false;
}
});
if(breakOut) {
breakOut = false;
return false;
}
1) create a .gitignore file, so to do that, you just create a .txt file and change the extention as following:
then you have to change the name writing the following line on the cmd:
rename git.txt .gitignore
where git.txt is the name of the file you've just created.
Then you can open the file and write all the files you don´t want to add on the repository. For example mine looks like this:
#OS junk files
[Tt]humbs.db
*.DS_Store
#Visual Studio files
*.[Oo]bj
*.user
*.aps
*.pch
*.vspscc
*.vssscc
*_i.c
*_p.c
*.ncb
*.suo
*.tlb
*.tlh
*.bak
*.[Cc]ache
*.ilk
*.log
*.lib
*.sbr
*.sdf
*.pyc
*.xml
ipch/
obj/
[Bb]in
[Dd]ebug*/
[Rr]elease*/
Ankh.NoLoad
#Tooling
_ReSharper*/
*.resharper
[Tt]est[Rr]esult*
#Project files
[Bb]uild/
#Subversion files
.svn
# Office Temp Files
~$*
Once you have this, you need to add it to your git repository. You have to save the file where your repository is.
Then in your git bash you have to write the following line:
If the respository already exists then you have to do the following:
1) git rm -r --cached . 2) git add . 3) git commit -m ".gitignore is now working"
If the step 2 dowsn´t work then you should write the hole route of the files that you would like to add.
Hope it helps!
GET takes name value pairs.
Try something like:
curl http://server:5050/a/c/getName/?param1=pradeep
or
curl http://server:5050/a/c/getName?param1=pradeep
btw a regular REST should look something like
curl http://server:5050/a/c/getName/pradeep
If it takes JSON in GET URL, it's not a standard way.
$mysqli->options(MYSQLI_OPT_INT_AND_FLOAT_NATIVE, TRUE);
Try this - worked for me.
The ArrayList
class is a wrapper class for an array. It contains an inner array.
public ArrayList<T> {
private Object[] array;
private int size;
}
A LinkedList
is a wrapper class for a linked list, with an inner node for managing the data.
public LinkedList<T> {
class Node<T> {
T data;
Node next;
Node prev;
}
private Node<T> first;
private Node<T> last;
private int size;
}
Note, the present code is used to show how the class may be, not the actual implementation. Knowing how the implementation may be, we can do the further analysis:
ArrayList is faster than LinkedList if I randomly access its elements. I think random access means "give me the nth element". Why ArrayList is faster?
Access time for ArrayList: O(1). Access time for LinkedList: O(n).
In an array, you can access to any element by using array[index]
, while in a linked list you must navigate through all the list starting from first
until you get the element you need.
LinkedList is faster than ArrayList for deletion. I understand this one. ArrayList's slower since the internal backing-up array needs to be reallocated.
Deletion time for ArrayList: Access time + O(n). Deletion time for LinkedList: Access time + O(1).
The ArrayList must move all the elements from array[index]
to array[index-1]
starting by the item to delete index. The LinkedList should navigate until that item and then erase that node by decoupling it from the list.
LinkedList is faster than ArrayList for deletion. I understand this one. ArrayList's slower since the internal backing-up array needs to be reallocated.
Insertion time for ArrayList: O(n). Insertion time for LinkedList: O(1).
Why the ArrayList can take O(n)? Because when you insert a new element and the array is full, you need to create a new array with more size (you can calculate the new size with a formula like 2 * size or 3 * size / 2). The LinkedList just add a new node next to the last.
This analysis is not just in Java but in another programming languages like C, C++ and C#.
More info here:
If you have a list view you can do this:
Define a select list:
@{
var Acciones = new SelectList(new[]
{
new SelectListItem { Text = "Modificar", Value =
Url.Action("Edit", "Countries")},
new SelectListItem { Text = "Detallar", Value =
Url.Action("Details", "Countries") },
new SelectListItem { Text = "Eliminar", Value =
Url.Action("Delete", "Countries") },
}, "Value", "Text");
}
Use the defined SelectList, creating a diferent id for each record (remember that id of each element must be unique in a view), and finally call a javascript function for onchange event (include parameters in example url and record key):
@Html.DropDownList("ddAcciones", Acciones, "Acciones", new { id =
item.CountryID, @onchange = "RealizarAccion(this.value ,id)" })
onchange function can be something as:
@section Scripts {
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery.unobtrusive-ajax.js"></script>
<script type="text/javascript">
function RealizarAccion(accion, country)
{
var url = accion + '/' + country;
if (url != null && url != '') {
window.location.href = url ;
}
}
</script>
@Scripts.Render("~/bundles/jqueryval")
}
This boils down to a difference between definitions and declarations.
Headers generally contain declarations; cpp files contain definitions. When you include a file with definitions more than once, you get duplicates during linking.
In your situation one defintion comes from foo.cpp
, and the other definition comes from main.cpp
, which includes foo.cpp
.
Note: if you change foo
to be static
, you would have no linking errors. Despite the lack of errors, this is not a good thing to do.
This worked for me for redirecting stdout (stderr can be handled similarly):
from subprocess import Popen, PIPE
pipe = Popen(path, stdout=PIPE)
text = pipe.communicate()[0]
If it doesn't work for you, please specify exactly the problem you're having.
I have had this problem also using excel 2007 with a foobar.xlsm (macro enabled ) workbook which would get the "Code execution has been interrupted" by simply trying to close the workbook on the red X in the right corner with no macros running at all, or any "initialize" form, workbook, or workheet macros either. The options I got were "End" or "Continue", Debug was always greyed out. I did as a previous poster suggested Control Panel->Programs and Features-> right click "Microsoft Office Proffesional 2007" (in my case) ->change->repair.
This resolved the problem for me. I might add this happened soon after a MS update and I also found an addin in Excel called "Team Foundation" from Microsoft which I certainly didnt install voluntarily
This is old topic but on my last test on one my API, cURL is faster and more stable. Sometimes file_get_contents on larger request need over 5 seconds when cURL need only from 1.4 to 1.9 seconds what is double faster.
I need to add one note on this that I just send GET and recive JSON content. If you setup cURL properly, you will have a great response. Just "tell" to cURL what you need to send and what you need to recive and that's it.
On your exampe I would like to do this setup:
$ch = curl_init('http://api.bitly.com/v3/shorten?login=user&apiKey=key&longUrl=url');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_TIMEOUT, 3);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json'));
$result = curl_exec($ch);
This request will return data in 0.10 second max
var myDiv = document.getElementById('myDiv'); //get #myDiv
alert(myDiv.clientHeight);
clientHeight and clientWidth are what you are looking for.
offsetHeight and offsetWidth also return the height and width but it includes the border and scrollbar. Depending on the situation, you can use one or the other.
Hope this helps.
Without FileReader
, we can use URL.createObjectURL
method to get the DOMString that represents the object ( our image file ).
Don't forget to validate image extension.
<input type="file" id="files" multiple />
<div class="image-preview"></div>
let file_input = document.querySelector('#files');
let image_preview = document.querySelector('.image-preview');
const handle_file_preview = (e) => {
let files = e.target.files;
let length = files.length;
for(let i = 0; i < length; i++) {
let image = document.createElement('img');
// use the DOMstring for source
image.src = window.URL.createObjectURL(files[i]);
image_preview.appendChild(image);
}
}
file_input.addEventListener('change', handle_file_preview);
I know that I am pretty late, but there is a nice and simple solution for this problem.
It's possible to return multiple values at once using destructuring.
function test()
{
return [ 'model' => 'someValue' , 'data' => 'someothervalue'];
}
Now you can use this
$result = test();
extract($result);
extract
creates a variable for each member in the array, named after that member. You can therefore now access $model
and $data
You're not actually going out after the values. You would need to gather them like this:
var title = document.getElementById("title").value;
var name = document.getElementById("name").value;
var tickets = document.getElementById("tickets").value;
You could put all of these in one array:
var myArray = [ title, name, tickets ];
Or many arrays:
var titleArr = [ title ];
var nameArr = [ name ];
var ticketsArr = [ tickets ];
Or, if the arrays already exist, you can use their .push()
method to push new values onto it:
var titleArr = [];
function addTitle ( title ) {
titleArr.push( title );
console.log( "Titles: " + titleArr.join(", ") );
}
Your save button doesn't work because you refer to this.form
, however you don't have a form on the page. In order for this to work you would need to have <form>
tags wrapping your fields:
I've made several corrections, and placed the changes on jsbin: http://jsbin.com/ufanep/2/edit
The new form follows:
<form>
<h1>Please enter data</h1>
<input id="title" type="text" />
<input id="name" type="text" />
<input id="tickets" type="text" />
<input type="button" value="Save" onclick="insert()" />
<input type="button" value="Show data" onclick="show()" />
</form>
<div id="display"></div>
There is still some room for improvement, such as removing the onclick
attributes (those bindings should be done via JavaScript, but that's beyond the scope of this question).
I've also made some changes to your JavaScript. I start by creating three empty arrays:
var titles = [];
var names = [];
var tickets = [];
Now that we have these, we'll need references to our input fields.
var titleInput = document.getElementById("title");
var nameInput = document.getElementById("name");
var ticketInput = document.getElementById("tickets");
I'm also getting a reference to our message display box.
var messageBox = document.getElementById("display");
The insert()
function uses the references to each input field to get their value. It then uses the push()
method on the respective arrays to put the current value into the array.
Once it's done, it cals the clearAndShow()
function which is responsible for clearing these fields (making them ready for the next round of input), and showing the combined results of the three arrays.
function insert ( ) {
titles.push( titleInput.value );
names.push( nameInput.value );
tickets.push( ticketInput.value );
clearAndShow();
}
This function, as previously stated, starts by setting the .value
property of each input to an empty string. It then clears out the .innerHTML
of our message box. Lastly, it calls the join()
method on all of our arrays to convert their values into a comma-separated list of values. This resulting string is then passed into the message box.
function clearAndShow () {
titleInput.value = "";
nameInput.value = "";
ticketInput.value = "";
messageBox.innerHTML = "";
messageBox.innerHTML += "Titles: " + titles.join(", ") + "<br/>";
messageBox.innerHTML += "Names: " + names.join(", ") + "<br/>";
messageBox.innerHTML += "Tickets: " + tickets.join(", ");
}
The final result can be used online at http://jsbin.com/ufanep/2/edit
I've used like this
function chatSearchCtrl($scope, $http,$sce) {
// some more my code
// take this
data['message'] = $sce.trustAsHtml(data['message']);
$scope.searchresults = data;
and in html I did
<p class="clsPyType clsChatBoxPadding" ng-bind-html="searchresults.message"></p>
thats it I get my <br/>
tag rendered
No! It's not a joke.
Take a look here: http://msdn.microsoft.com/en-us/library/ms186939.aspx
Character data types that are either fixed-length, nchar, or variable-length, nvarchar, Unicode data and use the UNICODE UCS-2 character set.
And also here: http://en.wikipedia.org/wiki/UTF-16
The older UCS-2 (2-byte Universal Character Set) is a similar character encoding that was superseded by UTF-16 in version 2.0 of the Unicode standard in July 1996.
A string-oriented alternative, that uses an array:
spec=(IGNORE REPLACE)
for p in {13..15}; do
echo "$p: ${spec[p==14]}";
done
which outputs:
13: IGNORE
14: REPLACE
15: IGNORE
remove -- R.java -- Clean the project and run again.. this worked for me ..
what i feel is #pragma
is a directive where if you want the code to be location specific .say a situation where you want the program counter to read from the specific address where the ISR is written then you can specify ISR at that location using #pragma vector=ADC12_VECTOR
and followd by interrupt rotines name and its description
First you need to define a LocationListener
to handle location changes.
private final LocationListener mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(final Location location) {
//your code here
}
};
Then get the LocationManager
and ask for location updates
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, LOCATION_REFRESH_TIME,
LOCATION_REFRESH_DISTANCE, mLocationListener);
}
And finally make sure that you have added the permission on the Manifest,
For using only network based location use this one
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
For GPS based location, this one
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
To check if a Path exists to a directory, use this one:
$pathToDirectory = "c:\program files\blahblah\"
if (![System.IO.Directory]::Exists($pathToDirectory))
{
mkdir $path1
}
To check if a Path to a file exists use what @Mathias suggested:
[System.IO.File]::Exists($pathToAFile)
Hey i think The fastest way to handle that kind of operation is to memset() the memory.
Example-
memset(&myPage.pageArray[0][0], 0, sizeof(myPage.pageArray));
A similar C++ way would be to use std::fill
char *begin = myPage.pageArray[0][0];
char *end = begin + sizeof(myPage.pageArray);
std::fill(begin, end, 0);
As you see from the other post you have linked, there isn't a way for the app to know if the user has left a review or not. And for good reason.
Think about it, if an app could tell if the user has left a review or not, the developer could restrict certain features that would only be unlocked if the user leaves a 5/5 rating. This would lead the other users of Google Play to not trust the reviews and would undermine the rating system.
The alternative solutions I have seen is that the app reminds the user to submit a rating whenever the app is opened a specific number of times, or a set interval. For example, on every 10th time the app is opened, ask the user to leave a rating and provide a "already done" and "remind me later" button. Keep showing this message if the user has chosen to remind him/her later. Some other apps developers show this message with an increasing interval (like, 5, 10, 15nth time the app is opened), because if a user hasn't left a review on the, for example, 100th time the app was opened, it's probably likely s/he won't be leaving one.
This solution isn't perfect, but I think it's the best you have for now. It does lead you to trust the user, but realize that the alternative would mean a potentially worse experience for everyone in the app market.
Seems that no one mentioned Query Express (http://www.albahari.com/queryexpress.aspx) and a fork Query ExPlus (also link at the bottom of http://www.albahari.com/queryexpress.aspx)
BTW. First URL is the home page of Joseph Albahari who is the author of LINQPad (check out this killer tool)
On Windows XP -
rundll32.exe syssetup,SetupOobeBnk
This will reset the 30 day timer for activation back to 30 days so you can enter in the key normally.
You could use Synonyms part in the database.
Then in view wizard from Synonyms tab find your saved synonyms and add to view and set inner join simply.
var mongo = require('mongodb');
var MongoClient = mongo.MongoClient;
MongoClient.connect('mongodb://'+DATABASEUSERNAME+':'+DATABASEPASSWORD+'@'+DATABASEHOST+':'DATABASEPORT+'/'+DATABASENAME,function(err, db){
if(err)
console.log(err);
else
{
console.log('Mongo Conn....');
}
});
//for local server
//in local server DBPASSWOAD and DBusername not required
MongoClient.connect('mongodb://'+DATABASEHOST+':'+DATABASEPORT+'/'+DATABASENAME,function(err, db){
if(err)
console.log(err);
else
{
console.log('Mongo Conn....');
}
});
Sometimes you have a custom background, in that cases a better solution is use android:foreground="?selectableItemBackground"
If you want ripple effect with rounded corners and custom background you can use this:
background_ripple.xml
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:color="@color/ripple_color">
<item android:id="@android:id/mask">
<shape android:shape="rectangle">
<solid android:color="@android:color/white" />
<corners android:radius="5dp" />
</shape>
</item>
<item android:id="@android:id/background">
<shape android:shape="rectangle">
<solid android:color="@android:color/white" />
<corners android:radius="5dp" />
</shape>
</item>
layout.xml
<Button
android:id="@+id/btn_play"
android:background="@drawable/background_ripple"
app:backgroundTint="@color/colorPrimary"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/play_now" />
I used this on API >= 21
After that you have to parse the results. Suppose results are in integers, then
int testint1 = Integer.parse(test1);
Similarly others should be parsed. Now the results should be checked for two higher marks in them, by using if statement After that take out the average.
you can specify fields like this:
LOAD XML LOCAL INFILE '/pathtofile/file.xml'
INTO TABLE my_tablename(personal_number, firstname, ...);
I got this message when I tried to git clone
a repo that was not mine. The fix was to fork and then clone.
try this css, it work for me
textarea:focus, input:focus{ border: none; }
one more approach to use.
first, define the following somewhere on the page:
<div id="valueHolderId">${someValue}</div>
then in JS, just do something similar to
var someValue = $('#valueHolderId').html();
it works great for the cases when all scripts are inside .js files and obviously there is no jstl available
This is an easy way to get a successful response from the server like PHP echo otherwise an error message.
BufferedReader br = null;
if (conn.getResponseCode() == 200) {
br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String strCurrentLine;
while ((strCurrentLine = br.readLine()) != null) {
System.out.println(strCurrentLine);
}
} else {
br = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
String strCurrentLine;
while ((strCurrentLine = br.readLine()) != null) {
System.out.println(strCurrentLine);
}
}
The absolute easiest way to stream a file into browser using ASP.NET MVC is this:
public ActionResult DownloadFile() {
return File(@"c:\path\to\somefile.pdf", "application/pdf", "Your Filename.pdf");
}
This is easier than the method suggested by @azarc3 since you don't even need to read the bytes.
Credit goes to: http://prideparrot.com/blog/archive/2012/8/uploading_and_returning_files#how_to_return_a_file_as_response
** Edit **
Apparently my 'answer' is the same as the OP's question. But I am not facing the problem he is having. Probably this was an issue with older version of ASP.NET MVC?
If you want to convert an int which is in the range 0-9 to a char, you may usually write something like this:
int x;
char c = '0' + x;
Now, if you want a character string, just add a terminating '\0' char:
char s[] = {'0' + x, '\0'};
Note that:
To convert the Keys to a List of their own:
listNumber = dicNumber.Select(kvp => kvp.Key).ToList();
Or you can shorten it up and not even bother using select:
listNumber = dicNumber.Keys.ToList();
The open-source Angara.Table library allows to load CSV into typed columns, so you can get the arrays from the columns. Each column can be indexed both by name or index. See http://predictionmachines.github.io/Angara.Table/saveload.html.
The library follows RFC4180 for CSV; it enables type inference and multiline strings.
Example:
using System.Collections.Immutable;
using Angara.Data;
using Angara.Data.DelimitedFile;
...
ReadSettings settings = new ReadSettings(Delimiter.Semicolon, false, true, null, null);
Table table = Table.Load("data.csv", settings);
ImmutableArray<double> a = table["double-column-name"].Rows.AsReal;
for(int i = 0; i < a.Length; i++)
{
Console.WriteLine("{0}: {1}", i, a[i]);
}
You can see a column type using the type Column, e.g.
Column c = table["double-column-name"];
Console.WriteLine("Column {0} is double: {1}", c.Name, c.Rows.IsRealColumn);
Since the library is focused on F#, you might need to add a reference to the FSharp.Core 4.4 assembly; click 'Add Reference' on the project and choose FSharp.Core 4.4 under "Assemblies" -> "Extensions".
you can also quote string
''+document.location+''.substring(2,3);
I came here looking for a similar solution. I really wanted to see the chrome output for the pageload from a new tab. (a form submission in my case) The solution I actually used was to modify the form target attribute so that the form submission would occur in the current tab. I was able to capture the network request. Problem Solved!
No, You can't do that, the only place you can call the constructor from another constructor in C# is immediately after ":" after the constructor. for example
class foo
{
public foo(){}
public foo(string s ) { }
public foo (string s1, string s2) : this(s1) {....}
}
Using ionic, i was able to fix this error using the command: "cordova clean"
You need to enclose your <parent>
elements in a surrounding element as XML Documents can have only one root node:
<parents> <!-- I've added this tag -->
<parent>
<child>
Text
</child>
</parent>
<parent>
<child>
<grandchild>
Text
</grandchild>
<grandchild>
Text
</grandchild>
</child>
<child>
Text
</child>
</parent>
</parents> <!-- I've added this tag -->
As you're receiving this markup from somewhere else, rather than generating it yourself, you may have to do this yourself by treating the response as a string and wrapping it with appropriate tags, prior to attempting to parse it as XML.
So, you've a couple of choices:
<parent>
node) and process each as a distinct XML DocumentTo build on @Livven's answer, here are some useful combinations.
variable substitution, leading tab retained, overwrite file, echo to stdout
tee /path/to/file <<EOF
${variable}
EOF
no variable substitution, leading tab retained, overwrite file, echo to stdout
tee /path/to/file <<'EOF'
${variable}
EOF
variable substitution, leading tab removed, overwrite file, echo to stdout
tee /path/to/file <<-EOF
${variable}
EOF
variable substitution, leading tab retained, append to file, echo to stdout
tee -a /path/to/file <<EOF
${variable}
EOF
variable substitution, leading tab retained, overwrite file, no echo to stdout
tee /path/to/file <<EOF >/dev/null
${variable}
EOF
the above can be combined with sudo
as well
sudo -u USER tee /path/to/file <<EOF
${variable}
EOF
You can try the following code to get time as HH:MM format:
SELECT CONVERT(VARCHAR(5),getdate(),108)
folder = "ABC"
tries to run a command named folder
with arguments =
and "ABC"
. The format of command in bash is:
command arguments separated with space
while assignment is done with:
variable=something
[ -f $newfoldername/Primetime.eyetv]
, [
is a command (test
)
and -f
and $newfoldername/Primetime.eyetv]
are two arguments. It
expects a third argument (]
) which it can't find (arguments must be
separated with space) and thus will show error.[-f $newfoldername/Primetime.eyetv]
tries to run a command [-f
with argument $newfoldername/Primetime.eyetv]
Generally for cases like this, paste your code in shellcheck and see the feedback.
You can't transition between two background images, as there's no way for the browser to know what you want to interpolate. As you've discovered, you can transition the background position. If you want the image to fade in on mouse over, I think the best way to do it with CSS transitions is to put the image on a containing element and then animate the background colour to transparent on the link itself:
span {
background: url(button.png) no-repeat 0 0;
}
a {
width: 32px;
height: 32px;
text-align: left;
background: rgb(255,255,255);
-webkit-transition: background 300ms ease-in 200ms; /* property duration timing-function delay */
-moz-transition: background 300ms ease-in 200ms;
-o-transition: background 300ms ease-in 200ms;
transition: background 300ms ease-in 200ms;
}
a:hover {
background: rgba(255,255,255,0);
}
I'd use SimpleXMLElement.
<?php
$xml = new SimpleXMLElement('<xml/>');
for ($i = 1; $i <= 8; ++$i) {
$track = $xml->addChild('track');
$track->addChild('path', "song$i.mp3");
$track->addChild('title', "Track $i - Track Title");
}
Header('Content-type: text/xml');
print($xml->asXML());
GIT serves it's purpose well for version control and team projects if commits and branches are maintained properly.
Step 1: Clone your local repo using cli as mentioned by above answers
$ cd [path_to_repo]
$ git remote add origin ssh://[email protected]//.git
$ git push -u origin --all
Step 2: You can follow any of the above steps to push/pull your works. Easy way is to use git gui. It provides Graphical Interface so that it's easy to stage(add)/unstage, commit/uncommit and push/pull. Beginners can easily understand the git process.
$ git gui
(OR)
Step 2: As mentioned above. Cli codes will do the work.
$ git status
$ git add [file_name]
$ git commit _m "[Comit message"]"
$ git push origin master/branch_name
Destructors provide an implicit way of freeing unmanaged resources encapsulated in your class, they get called when the GC gets around to it and they implicitly call the Finalize method of the base class. If you're using a lot of unmanaged resources it is better to provide an explicit way of freeing those resources via the IDisposable interface. See the C# programming guide: http://msdn.microsoft.com/en-us/library/66x5fx1b.aspx
You can use lambda to bind a method to an instance:
def run(self):
print self._instanceString
class A(object):
def __init__(self):
self._instanceString = "This is instance string"
a = A()
a.run = lambda: run(a)
a.run()
Output:
This is instance string
Wonder why nobody said it here earlier: to prevent <a href="#">
from scrolling document position to the top, simply use <a href="#/">
instead. That's mere HTML, no JQuery needed. Using event.preventDefault();
is just too much!
y-combinator in JavaScript:
var Y = function(f) {
return (function(g) {
return g(g);
})(function(h) {
return function() {
return f(h(h)).apply(null, arguments);
};
});
};
var factorial = Y(function(recurse) {
return function(x) {
return x == 0 ? 1 : x * recurse(x-1);
};
});
factorial(5) // -> 120
Edit: I learn a lot from looking at code, but this one is a bit tough to swallow without some background - sorry about that. With some general knowledge presented by other answers, you can begin to pick apart what is happening.
The Y function is the "y-combinator". Now take a look at the var factorial
line where Y is used. Notice you pass a function to it that has a parameter (in this example, recurse
) that is also used later on in the inner function. The parameter name basically becomes the name of the inner function allowing it to perform a recursive call (since it uses recurse()
in it's definition.) The y-combinator performs the magic of associating the otherwise anonymous inner function with the parameter name of the function passed to Y.
For the full explanation of how Y does the magic, checked out the linked article (not by me btw.)
Best ways of doing this,
1. WidgetsBinding
WidgetsBinding.instance.addPostFrameCallback((_) {
print("WidgetsBinding");
});
2. SchedulerBinding
SchedulerBinding.instance.addPostFrameCallback((_) {
print("SchedulerBinding");
});
It can be called inside initState
, both will be called only once after Build widgets done with rendering.
@override
void initState() {
// TODO: implement initState
super.initState();
print("initState");
WidgetsBinding.instance.addPostFrameCallback((_) {
print("WidgetsBinding");
});
SchedulerBinding.instance.addPostFrameCallback((_) {
print("SchedulerBinding");
});
}
both above codes will work the same as both use the similar binding framework. For the difference find the below link.
https://medium.com/flutterworld/flutter-schedulerbinding-vs-widgetsbinding-149c71cb607f
To quote the help page (try ?integer
), bolded portion mine:
Integer vectors exist so that data can be passed to C or Fortran code which expects them, and so that (small) integer data can be represented exactly and compactly.
Note that current implementations of R use 32-bit integers for integer vectors, so the range of representable integers is restricted to about +/-2*10^9: doubles can hold much larger integers exactly.
Like the help page says, R's integer
s are signed 32-bit numbers so can hold between -2147483648 and +2147483647 and take up 4 bytes.
R's numeric
is identical to an 64-bit double
conforming to the IEEE 754 standard. R has no single precision data type. (source: help pages of numeric
and double
). A double can store all integers between -2^53 and 2^53 exactly without losing precision.
We can see the data type sizes, including the overhead of a vector (source):
> object.size(1:1000)
4040 bytes
> object.size(as.numeric(1:1000))
8040 bytes
Just create a Pair<TFirst, TSecond>
type and use that as your value.
I have an example of one in my C# in Depth source code. Reproduced here for simplicity:
using System;
using System.Collections.Generic;
public sealed class Pair<TFirst, TSecond>
: IEquatable<Pair<TFirst, TSecond>>
{
private readonly TFirst first;
private readonly TSecond second;
public Pair(TFirst first, TSecond second)
{
this.first = first;
this.second = second;
}
public TFirst First
{
get { return first; }
}
public TSecond Second
{
get { return second; }
}
public bool Equals(Pair<TFirst, TSecond> other)
{
if (other == null)
{
return false;
}
return EqualityComparer<TFirst>.Default.Equals(this.First, other.First) &&
EqualityComparer<TSecond>.Default.Equals(this.Second, other.Second);
}
public override bool Equals(object o)
{
return Equals(o as Pair<TFirst, TSecond>);
}
public override int GetHashCode()
{
return EqualityComparer<TFirst>.Default.GetHashCode(first) * 37 +
EqualityComparer<TSecond>.Default.GetHashCode(second);
}
}
You seem to be doing file name comparisons, so I would just add that OrdinalIgnoreCase
is closest to what NTFS does (it's not exactly the same, but it's closer than InvariantCultureIgnoreCase
)
Another possibility is to select the Install Dependencies checkbox In the R package installer, on the bottom right:
According Spring 4 MVC ResponseEntity.BodyBuilder and ResponseEntity Enhancements Example it could be written as:
....
return ResponseEntity.ok().build();
....
return ResponseEntity.noContent().build();
UPDATE:
If returned value is Optional
there are convinient method, returned ok()
or notFound()
:
return ResponseEntity.of(optional)
git revert HEAD -m 1
In the above code line. "Last argument represents"
or
git reset --hard siriwjdd
To complement the preexisting, helpful answers with guidance of when to use which approach and a performance comparison.
Outside of a pipeline[1], use (PSv3+): $objects.Name
as demonstrated in rageandqq's answer, which is both syntactically simpler and much faster.
Accessing a property at the collection level to get its members' values as an array is called member enumeration and is a PSv3+ feature.
Alternatively, in PSv2, use the foreach
statement, whose output you can also assign directly to a variable:
$results = foreach ($obj in $objects) { $obj.Name }
If collecting all output from a (pipeline) command in memory first is feasible, you can also combine pipelines with member enumeration; e.g.:
(Get-ChildItem -File | Where-Object Length -lt 1gb).Name
Tradeoffs:
(Get-ChildItem).Name
), that command must first run to completion before the resulting array's elements can be accessed.In a pipeline, in case you must pass the results to another command, notably if the original input doesn't fit into memory as a whole, use: $objects | Select-Object -ExpandProperty Name
-ExpandProperty
is explained in Scott Saad's answer (you need it to get only the property value).For small input collections (arrays), you probably won't notice the difference, and, especially on the command line, sometimes being able to type the command easily is more important.
Here is an easy-to-type alternative, which, however is the slowest approach; it uses simplified ForEach-Object
syntax called an operation statement (again, PSv3+):
; e.g., the following PSv3+ solution is easy to append to an existing command:
$objects | % Name # short for: $objects | ForEach-Object -Process { $_.Name }
The PSv4+ .ForEach()
array method, more comprehensively discussed in this article, is yet another, well-performing alternative, but note that it requires collecting all input in memory first, just like member enumeration:
# By property name (string):
$objects.ForEach('Name')
# By script block (more flexibility; like ForEach-Object)
$objects.ForEach({ $_.Name })
This approach is similar to member enumeration, with the same tradeoffs, except that pipeline logic is not applied; it is marginally slower than member enumeration, though still noticeably faster than the pipeline.
For extracting a single property value by name (string argument), this solution is on par with member enumeration (though the latter is syntactically simpler).
The script-block variant ({ ... }
) allows arbitrary transformations; it is a faster - all-in-memory-at-once - alternative to the pipeline-based ForEach-Object
cmdlet (%
).
Note: The .ForEach()
array method, like its .Where()
sibling (the in-memory equivalent of Where-Object
), always returns a collection (an instance of [System.Collections.ObjectModel.Collection[psobject]]
), even if only one output object is produced.
By contrast, member enumeration, Select-Object
, ForEach-Object
and Where-Object
return a single output object as-is, without wrapping it in a collection (array).
Here are sample timings for the various approaches, based on an input collection of 10,000
objects, averaged across 10 runs; the absolute numbers aren't important and vary based on many factors, but it should give you a sense of relative performance (the timings come from a single-core Windows 10 VM:
Important
The relative performance varies based on whether the input objects are instances of regular .NET Types (e.g., as output by Get-ChildItem
) or [pscustomobject]
instances (e.g., as output by Convert-FromCsv
).
The reason is that [pscustomobject]
properties are dynamically managed by PowerShell, and it can access them more quickly than the regular properties of a (statically defined) regular .NET type. Both scenarios are covered below.
The tests use already-in-memory-in-full collections as input, so as to focus on the pure property extraction performance. With a streaming cmdlet / function call as the input, performance differences will generally be much less pronounced, as the time spent inside that call may account for the majority of the time spent.
For brevity, alias %
is used for the ForEach-Object
cmdlet.
General conclusions, applicable to both regular .NET type and [pscustomobject]
input:
The member-enumeration ($collection.Name
) and foreach ($obj in $collection)
solutions are by far the fastest, by a factor of 10 or more faster than the fastest pipeline-based solution.
Surprisingly, % Name
performs much worse than % { $_.Name }
- see this GitHub issue.
PowerShell Core consistently outperforms Windows Powershell here.
Timings with regular .NET types:
Factor Command Secs (10-run avg.)
------ ------- ------------------
1.00 $objects.Name 0.005
1.06 foreach($o in $objects) { $o.Name } 0.005
6.25 $objects.ForEach('Name') 0.028
10.22 $objects.ForEach({ $_.Name }) 0.046
17.52 $objects | % { $_.Name } 0.079
30.97 $objects | Select-Object -ExpandProperty Name 0.140
32.76 $objects | % Name 0.148
Factor Command Secs (10-run avg.)
------ ------- ------------------
1.00 $objects.Name 0.012
1.32 foreach($o in $objects) { $o.Name } 0.015
9.07 $objects.ForEach({ $_.Name }) 0.105
10.30 $objects.ForEach('Name') 0.119
12.70 $objects | % { $_.Name } 0.147
27.04 $objects | % Name 0.312
29.70 $objects | Select-Object -ExpandProperty Name 0.343
Conclusions:
.ForEach('Name')
clearly outperforms .ForEach({ $_.Name })
. In Windows PowerShell, curiously, the latter is faster, albeit only marginally so.Timings with [pscustomobject]
instances:
Factor Command Secs (10-run avg.)
------ ------- ------------------
1.00 $objects.Name 0.006
1.11 foreach($o in $objects) { $o.Name } 0.007
1.52 $objects.ForEach('Name') 0.009
6.11 $objects.ForEach({ $_.Name }) 0.038
9.47 $objects | Select-Object -ExpandProperty Name 0.058
10.29 $objects | % { $_.Name } 0.063
29.77 $objects | % Name 0.184
Factor Command Secs (10-run avg.)
------ ------- ------------------
1.00 $objects.Name 0.008
1.14 foreach($o in $objects) { $o.Name } 0.009
1.76 $objects.ForEach('Name') 0.015
10.36 $objects | Select-Object -ExpandProperty Name 0.085
11.18 $objects.ForEach({ $_.Name }) 0.092
16.79 $objects | % { $_.Name } 0.138
61.14 $objects | % Name 0.503
Conclusions:
Note how with [pscustomobject]
input .ForEach('Name')
by far outperforms the script-block based variant, .ForEach({ $_.Name })
.
Similarly, [pscustomobject]
input makes the pipeline-based Select-Object -ExpandProperty Name
faster, in Windows PowerShell virtually on par with .ForEach({ $_.Name })
, but in PowerShell Core still about 50% slower.
In short: With the odd exception of % Name
, with [pscustomobject]
the string-based methods of referencing the properties outperform the scriptblock-based ones.
Source code for the tests:
Note:
Download function Time-Command
from this Gist to run these tests.
Assuming you have looked at the linked code to ensure that it is safe (which I can personally assure you of, but you should always check), you can install it directly as follows:
irm https://gist.github.com/mklement0/9e1f13978620b09ab2d15da5535d1b27/raw/Time-Command.ps1 | iex
Set $useCustomObjectInput
to $true
to measure with [pscustomobject]
instances instead.
$count = 1e4 # max. input object count == 10,000
$runs = 10 # number of runs to average
# Note: Using [pscustomobject] instances rather than instances of
# regular .NET types changes the performance characteristics.
# Set this to $true to test with [pscustomobject] instances below.
$useCustomObjectInput = $false
# Create sample input objects.
if ($useCustomObjectInput) {
# Use [pscustomobject] instances.
$objects = 1..$count | % { [pscustomobject] @{ Name = "$foobar_$_"; Other1 = 1; Other2 = 2; Other3 = 3; Other4 = 4 } }
} else {
# Use instances of a regular .NET type.
# Note: The actual count of files and folders in your file-system
# may be less than $count
$objects = Get-ChildItem / -Recurse -ErrorAction Ignore | Select-Object -First $count
}
Write-Host "Comparing property-value extraction methods with $($objects.Count) input objects, averaged over $runs runs..."
# An array of script blocks with the various approaches.
$approaches = { $objects | Select-Object -ExpandProperty Name },
{ $objects | % Name },
{ $objects | % { $_.Name } },
{ $objects.ForEach('Name') },
{ $objects.ForEach({ $_.Name }) },
{ $objects.Name },
{ foreach($o in $objects) { $o.Name } }
# Time the approaches and sort them by execution time (fastest first):
Time-Command $approaches -Count $runs | Select Factor, Command, Secs*
[1] Technically, even a command without |
, the pipeline operator, uses a pipeline behind the scenes, but for the purpose of this discussion using the pipeline refers only to commands that do use |
and therefore involve multiple commands connected by a pipeline.
Use this also
NSString *ChkStr = [MyString substringWithRange:NSMakeRange(5, 26)];
Note - Your NSMakeRange(start, end)
should be NSMakeRange(start, end- start)
;
shell_exec
- Execute command via shell and return the complete output as a string
exec
- Execute an external program.
The difference is that with shell_exec
you get output as a return value.
there are two ways to install mysql client on centOS.
download rpm package from mysql website https://downloads.mysql.com/archives/community/
if you download this rpm package like picture, it's filename like mysql-community-client-8.0.21-1.el8.x86_64.rpm.
then execute sudo rpm -ivh --nodeps --force mysql-community-client-8.0.21-1.el8.x86_64.rpm
can install the rpm package the parameters -ivh
means install, print output, don't verify and check.
if raise error, maybe version conflict, you can execute rpm -pa | grep mysql
to find conflicting package, then execute rpm -e --nodeps <package name>
to remove them, and install once more.
finnaly, you can execute which mysql
, it's success if print /usr/bin/mysql.
Please refer to this official website:
The linefeed character \n
is not the line separator in certain operating systems (such as windows, where it's "\r\n") - my suggestion is that you use \r\n
instead, then it'll both see the line-break with only \n
and \r\n
, I've never had any problems using it.
Also, you should look into using a StringBuilder
instead of concatenating the String
in the while-loop at BookCatalog.toString()
, it is a lot more effective. For instance:
public String toString() {
BookNode current = front;
StringBuilder sb = new StringBuilder();
while (current!=null){
sb.append(current.getData().toString()+"\r\n ");
current = current.getNext();
}
return sb.toString();
}
You can use an anonymous function to pass the matches to your function:
$result = preg_replace_callback(
"/\{([<>])([a-zA-Z0-9_]*)(\?{0,1})([a-zA-Z0-9_]*)\}(.*)\{\\1\/\\2\}/isU",
function($m) { return CallFunction($m[1], $m[2], $m[3], $m[4], $m[5]); },
$result
);
Apart from being faster, this will also properly handle double quotes in your string. Your current code using /e
would convert a double quote "
into \"
.
Add an nested document in solr very complex and nested data search also very complex. but Elastic Search easy to add nested document and search
On Windows (WAMP) in CLI ini file:
X:\wamp\bin\php\php5.x.xx\php.ini
comment line
; XDEBUG Extension
;zend_extension = "X:/wamp/bin/php/php5.x.xx/zend_ext/php_xdebug-xxxxxx.dll"
Apache will process xdebug
, and composer will not.
int* test();
but it would be "more C++" to use vectors:
std::vector< int > test();
EDIT
I'll clarify some point. Since you mentioned C++, I'll go with new[]
and delete[]
operators, but it's the same with malloc/free.
In the first case, you'll write something like:
int* test() {
return new int[size_needed];
}
but it's not a nice idea because your function's client doesn't really know the size of the array you are returning, although the client can safely deallocate it with a call to delete[]
.
int* theArray = test();
for (size_t i; i < ???; ++i) { // I don't know what is the array size!
// ...
}
delete[] theArray; // ok.
A better signature would be this one:
int* test(size_t& arraySize) {
array_size = 10;
return new int[array_size];
}
And your client code would now be:
size_t theSize = 0;
int* theArray = test(theSize);
for (size_t i; i < theSize; ++i) { // now I can safely iterate the array
// ...
}
delete[] theArray; // still ok.
Since this is C++, std::vector<T>
is a widely-used solution:
std::vector<int> test() {
std::vector<int> vector(10);
return vector;
}
Now you don't have to call delete[]
, since it will be handled by the object, and you can safely iterate it with:
std::vector<int> v = test();
std::vector<int>::iterator it = v.begin();
for (; it != v.end(); ++it) {
// do your things
}
which is easier and safer.
A property that has only a getter is said to be readonly. Cause no setter is provided, to change the value of the property (from outside).
C# has has a keyword readonly, that can be used on fields (not properties). A field that is marked as "readonly", can only be set once during the construction of an object (in the constructor).
private string _name = "Foo"; // field for property Name;
private bool _enabled = false; // field for property Enabled;
public string Name{ // This is a readonly property.
get {
return _name;
}
}
public bool Enabled{ // This is a read- and writeable property.
get{
return _enabled;
}
set{
_enabled = value;
}
}
>>> format(3735928559, 'x')
'deadbeef'
I have got same Error while fetch data from json filesee attached link
"SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data"
So, i check the path of the json file which isn't correct,
const search = document.getElementById("search");
const matchList = document.getElementById("match-list");
//search json data and filter
const searchStates = async searchText => {
const res = await fetch('../state.json');
const states = await res.json();
console.log(states);
}
search.addEventListener('input', () => searchStates(search.value));
so that i changed the path of the file
const res = await fetch('./state.json');
& it gives me array back as a result. so, check your path & try changed it. It will work in my case. I hope that's works..
Try to assign the image that way instead:
imgFavorito.Source = new BitmapImage(new Uri(base.BaseUri, @"/Assets/favorited.png"));
For self-containing Maven project I usually installing all external jar dependencies into project's repository. For SQL Server JDBC driver you can do:
local-repo
in your Maven projectsqljdbc42.jar
into local-repo
folderlocal-repo
folder run mvn deploy:deploy-file -Dfile=sqljdbc42.jar -DartifactId=sqljdbc42 -DgroupId=com.microsoft.sqlserver -DgeneratePom=true -Dpackaging=jar -Dversion=6.0.7507.100 -Durl=file://.
to deploy JAR into local repository (stored together with your code in SCM)sqljdbc42.jar
and downloaded files can be deletedpom.xml
and add reference to project's local repository:
xml
<repositories>
<repository>
<id>parent-local-repository</id>
<name>Parent Local repository</name>
<layout>default</layout>
<url>file://${basedir}/local-repo</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
Now you can run your project everywhere without any additional configurations or installations.You should design your table WITHOUT considering the views.
Apart from saving joins and conditions, Views do have a performance advantage: SQL Server may calculate and save its execution plan in the view, and therefore make it faster than "on the fly" SQL statements.
View may also ease your work regarding user access at field level.
Declaring String str
outside of the while
loop allows it to be referenced inside & outside the while
loop. Declaring String str
inside of the while
loop allows it to only be referenced inside that while
loop.
I had the same problem. Go to Project Properties -> Deployment Assemplbly and add jstl jar
Here are another 2 options that allow you to invoke SaveChanges() in a for each loop.
The first option is use one DBContext to generate your list objects to iterate through, and then create a 2nd DBContext to call SaveChanges() on. Here is an example:
//Get your IQueryable list of objects from your main DBContext(db)
IQueryable<Object> objects = db.Object.Where(whatever where clause you desire);
//Create a new DBContext outside of the foreach loop
using (DBContext dbMod = new DBContext())
{
//Loop through the IQueryable
foreach (Object object in objects)
{
//Get the same object you are operating on in the foreach loop from the new DBContext(dbMod) using the objects id
Object objectMod = dbMod.Object.Find(object.id);
//Make whatever changes you need on objectMod
objectMod.RightNow = DateTime.Now;
//Invoke SaveChanges() on the dbMod context
dbMod.SaveChanges()
}
}
The 2nd option is to get a list of database objects from the DBContext, but to select only the id's. And then iterate through the list of id's (presumably an int) and get the object corresponding to each int, and invoke SaveChanges() that way. The idea behind this method is grabbing a large list of integers, is a lot more efficient then getting a large list of db objects and calling .ToList() on the entire object. Here is an example of this method:
//Get the list of objects you want from your DBContext, and select just the Id's and create a list
List<int> Ids = db.Object.Where(enter where clause here)Select(m => m.Id).ToList();
var objects = Ids.Select(id => db.Objects.Find(id));
foreach (var object in objects)
{
object.RightNow = DateTime.Now;
db.SaveChanges()
}
without jQuery you can use
document.getElementById('text_input').setAttribute('maxlength',200);
The problem is with percentage sizing. You are not defining the size of the parent div (the new one), so the browser can not report the size to the Google Maps API. Giving the wrapper div a specific size, or a percentage size if the size of its parent can be determined, will work.
See this explanation from Mike Williams' Google Maps API v2 tutorial:
If you try to use style="width:100%;height:100%" on your map div, you get a map div that has zero height. That's because the div tries to be a percentage of the size of the
<body>
, but by default the<body>
has an indeterminate height.There are ways to determine the height of the screen and use that number of pixels as the height of the map div, but a simple alternative is to change the
<body>
so that its height is 100% of the page. We can do this by applying style="height:100%" to both the<body>
and the<html>
. (We have to do it to both, otherwise the<body>
tries to be 100% of the height of the document, and the default for that is an indeterminate height.)
Add the 100% size to html and body in your css
html, body, #map-canvas {
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
Add it inline to any divs that don't have an id:
<body>
<div style="height:100%; width: 100%;">
<div id="map-canvas"></div>
</div>
</body>
I implemented access using the following
class D(Enum):
x = 1
y = 2
def __str__(self):
return '%s' % self.value
now I can just do
print(D.x)
to get 1
as result.
You can also use self.name
in case you wanted to print x
instead of 1
.
In case you are looking for a cut and paste method that creates and writes to a file, here's one I wrote that just takes a String input. Remove 'true' from PrintWriter if you want to overwrite the file each time.
private static final String newLine = System.getProperty("line.separator");
private synchronized void writeToFile(String msg) {
String fileName = "c:\\TEMP\\runOutput.txt";
PrintWriter printWriter = null;
File file = new File(fileName);
try {
if (!file.exists()) file.createNewFile();
printWriter = new PrintWriter(new FileOutputStream(fileName, true));
printWriter.write(newLine + msg);
} catch (IOException ioex) {
ioex.printStackTrace();
} finally {
if (printWriter != null) {
printWriter.flush();
printWriter.close();
}
}
}
{
"number" : ["1","2","3"],
"alphabet" : ["a", "b", "c"]
}
Yes of course, just add the response y
as first column in the dataframe and call lm()
on it:
d2<-data.frame(y,d)
> d2
y x1 x2 x3
1 1 4 3 4
2 4 -1 9 -4
3 6 3 8 -2
> lm(d2)
Call:
lm(formula = d2)
Coefficients:
(Intercept) x1 x2 x3
-5.6316 0.7895 1.1579 NA
Also, my information about R points out that assignment with <-
is recommended over =
.
...and for your right click notification menu add a context menu to the form and edit it and set mouseclick events for each of contextmenuitems by double clicking them and then attach it to the notifyicon1 by selecting the ContextMenuStrip in notifyicon property.
Try the following query:
db.student.find({}, {roll: 1, _id: 0}).pretty();
Hope this helps!!
You could just make the join and after that select the wanted columns https://spark.apache.org/docs/latest/api/python/pyspark.sql.html?highlight=dataframe%20join#pyspark.sql.DataFrame.join
The easilest way is
import java.util.*;
public class Stdio4 {
public static void main(String[] args) {
int a=0;
int arr[] = new int[3];
Scanner scan = new Scanner(System.in);
for(int i=0;i<3;i++)
{
a = scan.nextInt(); //Takes input from separate lines
arr[i]=a;
}
for(int i=0;i<3;i++)
{
System.out.println(arr[i]); //outputs in separate lines also
}
}
}
I needed to get the element as a string.
jQuery("#bob").get(0).outerHTML;
Which will give you something like:
<input type="text" id="bob" value="hello world" />
...as a string rather than a DOM element.
Matlab allows you to return multiple values as well as receive them inline.
When you call it, receive individual variables inline:
[array, listp, freep] = initialize(size)
The removeAttr()
function only removes HTML attributes. The display
is not a HTML attribute, it's a CSS property. You'd like to use css()
function instead to manage CSS properties.
But jQuery offers a show()
function which does exactly what you want in a concise call:
$("span").show();
You're right that the SD Card directory is /sdcard
but you shouldn't be hard coding it. Instead, make a call to Environment.getExternalStorageDirectory()
to get the directory:
File sdDir = Environment.getExternalStorageDirectory();
If you haven't done so already, you will need to give your app the correct permission to write to the SD Card by adding the line below to your Manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
I found a reference to this in condas issues. The following should now work.
name: sample_env
channels:
dependencies:
- requests
- bokeh>=0.10.0
- pip:
- git+https://github.com/pythonforfacebook/facebook-sdk.git
Download openssl for windows from https://code.google.com/archive/p/openssl-for-windows/downloads
Set Environment variable to the path variable as path="C:\your_folder\openssl-0.9.8k_X64\bin"
In addition to the other answers, note that a multidimensional array is allocated as one big chunky object on the heap. This has some implications:
<gcAllowVeryLargeObjects>
for multidimensional arrays way before the issue will ever come up if you only ever use jagged arrays.In HTML page:
<script>
function insert_tag()
{
$.ajax({
url: "aaa.php",
type: "POST",
data: {
ssd: "yes",
data: $("#form_insert").serialize()
},
dataType: "JSON",
success: function (jsonStr) {
$("#result1").html(jsonStr['back_message']);
}
});
}
</script>
<form id="form_insert">
<input type="text" name="f1" value="a"/>
<input type="text" name="f2" value="b"/>
<input type="text" name="f3" value="c"/>
<input type="text" name="f4" value="d"/>
<div onclick="insert_tag();"><b>OK</b></div>
<div id="result1">...</div>
</form>
on PHP page:
<?php
if(isset($_POST['data']))
{
parse_str($_POST['data'], $searcharray);
$data = array(
"back_message" => $searcharray['f1']
);
echo json_encode($data);
}
?>
on this php code, return f1
field.
Swift 4
While the previous saying to prepare for segue is correct and its true the back button belongs to the previous VC, its just adding a bunch more unnecessary code.
The best thing to do is set the title of the current VC in viewDidLoad and it'll automatically set the back button title correctly on the next VC. This line worked for me
navigationController?.navigationBar.topItem?.title = "Title"
Google Apps Script is JavaScript, the date object is initiated with new Date()
and all JavaScript methods apply, see doc here
A small word of caution, if "do some stuff" means updating the value of the actual property that you visit AND if there is a struct type property along the path from root object to the visited property, the change you made on the property will not be reflected on the root object.
you can't use dataSourceClassName approach in application.properties configurations as said by @Andy Wilkinson. if you want to have dataSourceClassName anyway you can use Java Config as:
@Configuration
@ComponentScan
class DataSourceConfig {
@Value("${spring.datasource.username}")
private String user;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.url}")
private String dataSourceUrl;
@Value("${spring.datasource.dataSourceClassName}")
private String dataSourceClassName;
@Value("${spring.datasource.poolName}")
private String poolName;
@Value("${spring.datasource.connectionTimeout}")
private int connectionTimeout;
@Value("${spring.datasource.maxLifetime}")
private int maxLifetime;
@Value("${spring.datasource.maximumPoolSize}")
private int maximumPoolSize;
@Value("${spring.datasource.minimumIdle}")
private int minimumIdle;
@Value("${spring.datasource.idleTimeout}")
private int idleTimeout;
@Bean
public DataSource primaryDataSource() {
Properties dsProps = new Properties();
dsProps.put("url", dataSourceUrl);
dsProps.put("user", user);
dsProps.put("password", password);
dsProps.put("prepStmtCacheSize",250);
dsProps.put("prepStmtCacheSqlLimit",2048);
dsProps.put("cachePrepStmts",Boolean.TRUE);
dsProps.put("useServerPrepStmts",Boolean.TRUE);
Properties configProps = new Properties();
configProps.put("dataSourceClassName", dataSourceClassName);
configProps.put("poolName",poolName);
configProps.put("maximumPoolSize",maximumPoolSize);
configProps.put("minimumIdle",minimumIdle);
configProps.put("minimumIdle",minimumIdle);
configProps.put("connectionTimeout", connectionTimeout);
configProps.put("idleTimeout", idleTimeout);
configProps.put("dataSourceProperties", dsProps);
HikariConfig hc = new HikariConfig(configProps);
HikariDataSource ds = new HikariDataSource(hc);
return ds;
}
}
reason you cannot use dataSourceClassName because it will throw and exception
Caused by: java.lang.IllegalStateException: both driverClassName and dataSourceClassName are specified, one or the other should be used.
which mean spring boot infers from spring.datasource.url property the Driver and at the same time setting the dataSourceClassName creates this exception. To make it right your application.properties should look something like this for HikariCP datasource:
# hikariCP
spring.jpa.databasePlatform=org.hibernate.dialect.MySQLDialect
spring.datasource.url=jdbc:mysql://localhost:3306/exampledb
spring.datasource.username=root
spring.datasource.password=
spring.datasource.poolName=SpringBootHikariCP
spring.datasource.maximumPoolSize=5
spring.datasource.minimumIdle=3
spring.datasource.maxLifetime=2000000
spring.datasource.connectionTimeout=30000
spring.datasource.idleTimeout=30000
spring.datasource.pool-prepared-statements=true
spring.datasource.max-open-prepared-statements=250
Note: Please check if there is any tomcat-jdbc.jar or commons-dbcp.jar in your classpath added most of the times by transitive dependency. If these are present in classpath Spring Boot will configure the Datasource using default connection pool which is tomcat. HikariCP will only be used to create the Datasource if there is no other provider in classpath. there is a fallback sequence from tomcat -> to HikariCP -> to Commons DBCP.
I've tried the NullObjectPattern
but for me is not always the best way to go. There are sometimes when a "no action" is not appropiate.
NullPointerException
is a Runtime exception that means it's developers fault and with enough experience it tells you exactly where is the error.
Now to the answer:
Try to make all your attributes and its accessors as private as possible or avoid to expose them to the clients at all. You can have the argument values in the constructor of course, but by reducing the scope you don't let the client class pass an invalid value. If you need to modify the values, you can always create a new object
. You check the values in the constructor only once and in the rest of the methods you can be almost sure that the values are not null.
Of course, experience is the better way to understand and apply this suggestion.
Byte!
Swift 3
extension String {
var html2AttributedString: NSAttributedString? {
guard
let data = data(using: String.Encoding.utf8)
else { return nil }
do {
return try NSAttributedString(data: data, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute:String.Encoding.utf8], documentAttributes: nil)
} catch let error as NSError {
print(error.localizedDescription)
return nil
}
}
var html2String: String {
return html2AttributedString?.string ?? ""
}
}
I'm surprised no one is using the Scrolloff
option which keeps the cursor in the middle of the page.
Try it with:
:set so=999
It's the first recommended method on the Vim wiki and works well.
Check the LOB segment name from dba_lobs using the table name.
select TABLE_NAME,OWNER,COLUMN_NAME,SEGMENT_NAME from dba_lobs where TABLE_NAME='<<TABLE NAME>>';
Now use the segment name to find the bytes used in dba_segments.
select s.segment_name, s.partition_name, bytes/1048576 "Size (MB)"
from dba_segments s, dba_lobs l
where s.segment_name = l.segment_name
and s.owner = '<< OWNER >> ' order by s.segment_name, s.partition_name;
I had this in VS 2012 where the "Section name" had been changed in a project, and I fixed it by deleting "app.config" in the project, then right-clicking on the project in the "Solution Explorer", selecting "Properties", then "Settings", then making a change to one of the settings, saving, and re-building. This created a new app.config with the correct information.
This code works for a numpy 2D matrix array:
mat = np.array([[1, 3], [2, 5]]) # numpy matrix
n = 2 # n
n_largest_mat = np.sort(mat, axis=None)[-n:] # n_largest
tf_n_largest = np.zeros((2,2), dtype=bool) # all false matrix
for x in n_largest_mat:
tf_n_largest = (tf_n_largest) | (mat == x) # true-false
n_largest_elems = mat[tf_n_largest] # true-false indexing
This produces a true-false n_largest matrix indexing that also works to extract n_largest elements from a matrix array
I think that for simple HTTP requests like this it's better to use the request
module. You need to install it with npm (npm install request
) and then your code can look like this:
const request = require('request')
,url = 'http://graph.facebook.com/517267866/?fields=picture'
request(url, (error, response, body)=> {
if (!error && response.statusCode === 200) {
const fbResponse = JSON.parse(body)
console.log("Got a response: ", fbResponse.picture)
} else {
console.log("Got an error: ", error, ", status code: ", response.statusCode)
}
})
A lambda is just an anonymous function - a function defined with no name. In some languages, such as Scheme, they are equivalent to named functions. In fact, the function definition is re-written as binding a lambda to a variable internally. In other languages, like Python, there are some (rather needless) distinctions between them, but they behave the same way otherwise.
A closure is any function which closes over the environment in which it was defined. This means that it can access variables not in its parameter list. Examples:
def func(): return h
def anotherfunc(h):
return func()
This will cause an error, because func
does not close over the environment in anotherfunc
- h
is undefined. func
only closes over the global environment. This will work:
def anotherfunc(h):
def func(): return h
return func()
Because here, func
is defined in anotherfunc
, and in python 2.3 and greater (or some number like this) when they almost got closures correct (mutation still doesn't work), this means that it closes over anotherfunc
's environment and can access variables inside of it. In Python 3.1+, mutation works too when using the nonlocal
keyword.
Another important point - func
will continue to close over anotherfunc
's environment even when it's no longer being evaluated in anotherfunc
. This code will also work:
def anotherfunc(h):
def func(): return h
return func
print anotherfunc(10)()
This will print 10.
This, as you notice, has nothing to do with lambdas - they are two different (although related) concepts.
WARNING: Do not run this on a production machine.
On a Linux box:
redis-cli KEYS "*" | wc -l
Note: As mentioned in comments below, this is an O(N) operation, so on a large DB with many keys you should not use this. For smaller deployments, it should be fine.
I've had good results with this one. Much easier to use than Sharpen.
http://tangiblesoftwaresolutions.com/Product_Details/Java_to_CSharp_Converter.html
Let's assume we're working with the following representation of data (two columns, k
and v
, where k
contains three entries, two unique:
+---+---+
| k| v|
+---+---+
|foo| 1|
|bar| 2|
|foo| 3|
+---+---+
With a Pandas dataframe:
import pandas as pd
p_df = pd.DataFrame([("foo", 1), ("bar", 2), ("foo", 3)], columns=("k", "v"))
p_df['k'].unique()
This returns an ndarray
, i.e. array(['foo', 'bar'], dtype=object)
You asked for a "pyspark dataframe alternative for pandas df['col'].unique()". Now, given the following Spark dataframe:
s_df = sqlContext.createDataFrame([("foo", 1), ("bar", 2), ("foo", 3)], ('k', 'v'))
If you want the same result from Spark, i.e. an ndarray
, use toPandas()
:
s_df.toPandas()['k'].unique()
Alternatively, if you don't need an ndarray
specifically and just want a list of the unique values of column k
:
s_df.select('k').distinct().rdd.map(lambda r: r[0]).collect()
Finally, you can also use a list comprehension as follows:
[i.k for i in s_df.select('k').distinct().collect()]
I gave all users full access on the xampp folder, inclusive subdirectories. Afterwards it worked.
To blank it:
myObject["myVar"]=null;
To remove it:
delete myObject["myVar"]
as you can see in duplicate answers
Try this:
SELECT *
FROM (SELECT * FROM (
SELECT
id,
client_id,
create_time,
ROW_NUMBER() OVER(PARTITION BY client_id ORDER BY create_time DESC) rn
FROM order
)
WHERE rn=1
ORDER BY create_time desc) alias_name
WHERE rownum <= 100
ORDER BY rownum;
Or TOP:
SELECT TOP 2 * FROM Customers; //But not supported in Oracle
NOTE: I suppose that your internal query is fine. Please share your output of this.
This has been fully answered here.
See Oracle's docs on SELECT to see how subquery factoring works, and Mark's example:
WITH employee AS (SELECT * FROM Employees)
SELECT * FROM employee WHERE ID < 20
UNION ALL
SELECT * FROM employee WHERE Sex = 'M'
@Martin Bean's answer is perfectly correct but in my point of view it needs some refactoring to fit what a regular user would expect from a website (web system).
I think that when minutes are below 10 a leading zero must be added.
ex: 10:01, not 10:1
I changed code to accept $time = 0
since 0:00 is better than 24:00.
One more thing - there is no case when $time
is bigger than 1439 - which is 23:59 and next value is simply 0:00.
function convertToHoursMins($time, $format = '%d:%s') {
settype($time, 'integer');
if ($time < 0 || $time >= 1440) {
return;
}
$hours = floor($time/60);
$minutes = $time%60;
if ($minutes < 10) {
$minutes = '0' . $minutes;
}
return sprintf($format, $hours, $minutes);
}
Your onTap
override receives the MapView
from which you can obtain the Context
:
@Override
public boolean onTap(GeoPoint p, MapView mapView)
{
// ...
Intent intent = new Intent();
intent.setClass(mapView.getContext(), FullscreenView.class);
startActivity(intent);
// ...
}
best bet is targeting features not devices unless you have to, bootstrap do well and you can extend on their breakpoints, for instance targeting pixel density and larger screens above 1920
Easiest way to do is :
awk 'NR==FNR{a[$1]++;next} a[$1] ' file1 file2
Files are not necessary to be sorted.
If you do grouping by virtue of including GROUP BY
clause, any expression in SELECT
, which is not group function (or aggregate function or aggregated column) such as COUNT
, AVG
, MIN
, MAX
, SUM
and so on (List of Aggregate functions) should be present in GROUP BY
clause.
Example (correct way) (here employee_id
is not group function (non-aggregated column), so it must appear in GROUP BY
. By contrast, sum(salary) is a group function (aggregated column), so it is not required to appear in the GROUP BY
clause.
SELECT employee_id, sum(salary)
FROM employees
GROUP BY employee_id;
Example (wrong way) (here employee_id
is not group function and it does not appear in GROUP BY
clause, which will lead to the ORA-00979 Error .
SELECT employee_id, sum(salary)
FROM employees;
To correct you need to do one of the following :
SELECT
clause in the
GROUP BY
clauseSELECT
clause.A note for using Docker Windows containers after I had to look for this problem for a long time!
Condiditions:
Problem:
Solution as partially discripted here:
docker run -d -p 1433:1433 -e sa_password=<STRONG_PASSWORD> -e ACCEPT_EULA=Y microsoft/mssql-server-windows-developer
docker exec -it <CONTAINERID> cmd.exe
mkdir DirForMount
docker container stop <CONTAINERID>
docker commit <CONTAINERID> <NEWIMAGENAME>
docker container rm <CONTAINERID>
docker run -d -p 1433:1433 -e sa_password=<STRONG_PASSWORD> -e ACCEPT_EULA=Y -v C:\DirToMount:C:\DirForMount <NEWIMAGENAME>
After this i solved this problem on docker windows containers.
var doc = new DOMParser().parseFromString(html, "text/html");
var links = doc.querySelectorAll("a");
I realize this has been answered a few times over, but just to offer another approach:
I like to use the .Cast<T>()
method, it helps me maintain sanity in seeing the explicit type defined and deep down I think .AsEnumerable()
calls it anyways:
var results = from myRow in myDataTable.Rows.Cast<DataRow>()
where myRow.Field<int>("RowNo") == 1 select myRow;
or
var results = myDataTable.Rows.Cast<DataRow>()
.FirstOrDefault(x => x.Field<int>("RowNo") == 1);
As noted in comments, no other assemblies needed as it's part of Linq (Reference)