How to add images to README.md on GitHub?
Try this markdown:
I think you can link directly to the raw version of an image if it's stored in your repository. i.e.
Prevent typing non-numeric in input type number
Update on the accepted answer:
Because of many properties becoming deprecated
(property) KeyboardEvent.which: number @deprecated
you should just rely on the key property and create the rest of the logic by yourself:
The code allows Enter, Backspace and all numbers [0-9], every other character is disallowed.
document.querySelector("input").addEventListener("keypress", (e) => {
if (isNaN(parseInt(e.key, 10)) && e.key !== "Backspace" && e.key !== "Enter") {
e.preventDefault();
}
});
NOTE This will disable paste action
Global Events in Angular
DO Not Use EventEmitter for your service communication.
You should use one of the Observable types. I personally like BehaviorSubject.
Simple example:
You can pass initial state, here I passing null
let subject = new BehaviorSubject(null);
When you want to update the subject
subject.next(myObject)
Observe from any service or component and act when it gets new updates.
subject.subscribe(this.YOURMETHOD);
jQuery selector for the label of a checkbox
$("label[for='"+$(this).attr("id")+"']");
This should allow you to select labels for all the fields in a loop as well. All you need to ensure is your labels should say for='FIELD' where FIELD is the id of the field for which this label is being defined.
Excel 2013 horizontal secondary axis
You should follow the guidelines on Add a secondary horizontal axis:
Add a secondary horizontal axis
To complete this procedure, you must have a chart that displays a secondary vertical axis. To add a secondary vertical axis, see Add a secondary vertical axis.
Click a chart that displays a secondary vertical axis. This displays the Chart Tools, adding the Design, Layout, and Format tabs.
On the Layout tab, in the Axes group, click Axes.
Click Secondary Horizontal Axis, and then click the display option that you want.
Add a secondary vertical axis
You can plot data on a secondary vertical axis one data series at a time. To plot more than one data series on the secondary vertical axis, repeat this procedure for each data series that you want to display on the secondary vertical axis.
In a chart, click the data series that you want to plot on a secondary vertical axis, or do the following to select the data series from a list of chart elements:
Click the chart.
This displays the Chart Tools, adding the Design, Layout, and Format tabs.
On the Format tab, in the Current Selection group, click the arrow in the Chart Elements box, and then click the data series that you want to plot along a secondary vertical axis.
On the Format tab, in the Current Selection group, click Format Selection. The Format Data Series dialog box is displayed.
Note: If a different dialog box is displayed, repeat step 1 and make sure that you select a data series in the chart.
On the Series Options tab, under Plot Series On, click Secondary Axis and then click Close.
A secondary vertical axis is displayed in the chart.
To change the display of the secondary vertical axis, do the following:
On the Layout tab, in the Axes group, click Axes.
Click Secondary Vertical Axis, and then click the display option that you want.
To change the axis options of the secondary vertical axis, do the following:
Right-click the secondary vertical axis, and then click Format Axis.
Under Axis Options, select the options that you want to use.
Submitting a form on 'Enter' with jQuery?
Here's a way to do this as a JQuery plugin (in case you want to re-use the functionality):
$.fn.onEnterKey =
function( closure ) {
$(this).keypress(
function( event ) {
var code = event.keyCode ? event.keyCode : event.which;
if (code == 13) {
closure();
return false;
}
} );
}
Now if you want to decorate an <input> element with this type of functionality it's as simple as this:
$('#your-input-id').onEnterKey(
function() {
// Do stuff here
} );
How to copy data from one HDFS to another HDFS?
It's also useful to note that you can run the underlying MapReduce jobs with either the source or target cluster like so:
hadoop --config /path/to/hadoop/config distcp <src> <dst>
Plotting categorical data with pandas and matplotlib
like this :
df.groupby('colour').size().plot(kind='bar')
HTML5 Video Stop onClose
The problem may be with jquery selector you've chosen
$("video") is not a selector
The right selector may be putting an id element for video tag i.e.
Let's say your video element looks like this:
<video id="vid1" width="480" height="267" oster="example.jpg" durationHint="33">
<source src="video1.ogv" />
<source src="video2.ogv" />
</video>
Then you can select it via $("#vid1") with hash mark (#), id selector in jquery.
If a video element is exposed in function,then you have access to HtmlVideoElement (HtmlMediaElement).This elements has control over video element,in your case you can use pause() method for your video element.
Check reference for VideoElement here.
Also check that there is a fallback reference here.
Why should I use var instead of a type?
When you say "by warnings" what exactly do you mean? I've usually seen it giving a hint that you may want to use var, but nothing as harsh as a warning.
There's no performance difference with var - the code is compiled to the same IL. The potential benefit is in readability - if you've already made the type of the variable crystal clear on the RHS of the assignment (e.g. via a cast or a constructor call), where's the benefit of also having it on the LHS? It's a personal preference though.
If you don't want R# suggesting the use of var, just change the options. One thing about ReSharper: it's very configurable :)
Nested or Inner Class in PHP
Intro:
Nested classes relate to other classes a little differently than outer classes. Taking Java as an example:
Non-static nested classes have access to other members of the enclosing class, even if they are declared private. Also, non-static nested classes require an instance of the parent class to be instantiated.
OuterClass outerObj = new OuterClass(arguments);
outerObj.InnerClass innerObj = outerObj.new InnerClass(arguments);
There are several compelling reasons for using them:
- It is a way of logically grouping classes that are only used in one place.
If a class is useful to only one other class, then it is logical to relate and embed it in that class and keep the two together.
- It increases encapsulation.
Consider two top-level classes, A and B, where B needs access to members of A that would otherwise be declared private. By hiding class B within class A, A's members can be declared private and B can access them. In addition, B itself can be hidden from the outside world.
- Nested classes can lead to more readable and maintainable code.
A nested class usually relates to it's parent class and together form a "package"
In PHP
You can have similar behavior in PHP without nested classes.
If all you want to achieve is structure/organization, as Package.OuterClass.InnerClass, PHP namespaces might sufice. You can even declare more than one namespace in the same file (although, due to standard autoloading features, that might not be advisable).
namespace;
class OuterClass {}
namespace OuterClass;
class InnerClass {}
If you desire to emulate other characteristics, such as member visibility, it takes a little more effort.
Defining the "package" class
namespace {
class Package {
/* protect constructor so that objects can't be instantiated from outside
* Since all classes inherit from Package class, they can instantiate eachother
* simulating protected InnerClasses
*/
protected function __construct() {}
/* This magic method is called everytime an inaccessible method is called
* (either by visibility contrains or it doesn't exist)
* Here we are simulating shared protected methods across "package" classes
* This method is inherited by all child classes of Package
*/
public function __call($method, $args) {
//class name
$class = get_class($this);
/* we check if a method exists, if not we throw an exception
* similar to the default error
*/
if (method_exists($this, $method)) {
/* The method exists so now we want to know if the
* caller is a child of our Package class. If not we throw an exception
* Note: This is a kind of a dirty way of finding out who's
* calling the method by using debug_backtrace and reflection
*/
$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
if (isset($trace[2])) {
$ref = new ReflectionClass($trace[2]['class']);
if ($ref->isSubclassOf(__CLASS__)) {
return $this->$method($args);
}
}
throw new \Exception("Call to private method $class::$method()");
} else {
throw new \Exception("Call to undefined method $class::$method()");
}
}
}
}
Use case
namespace Package {
class MyParent extends \Package {
public $publicChild;
protected $protectedChild;
public function __construct() {
//instantiate public child inside parent
$this->publicChild = new \Package\MyParent\PublicChild();
//instantiate protected child inside parent
$this->protectedChild = new \Package\MyParent\ProtectedChild();
}
public function test() {
echo "Call from parent -> ";
$this->publicChild->protectedMethod();
$this->protectedChild->protectedMethod();
echo "<br>Siblings<br>";
$this->publicChild->callSibling($this->protectedChild);
}
}
}
namespace Package\MyParent
{
class PublicChild extends \Package {
//Makes the constructor public, hence callable from outside
public function __construct() {}
protected function protectedMethod() {
echo "I'm ".get_class($this)." protected method<br>";
}
protected function callSibling($sibling) {
echo "Call from " . get_class($this) . " -> ";
$sibling->protectedMethod();
}
}
class ProtectedChild extends \Package {
protected function protectedMethod() {
echo "I'm ".get_class($this)." protected method<br>";
}
protected function callSibling($sibling) {
echo "Call from " . get_class($this) . " -> ";
$sibling->protectedMethod();
}
}
}
Testing
$parent = new Package\MyParent();
$parent->test();
$pubChild = new Package\MyParent\PublicChild();//create new public child (possible)
$protChild = new Package\MyParent\ProtectedChild(); //create new protected child (ERROR)
Output:
Call from parent -> I'm Package protected method
I'm Package protected method
Siblings
Call from Package -> I'm Package protected method
Fatal error: Call to protected Package::__construct() from invalid context
NOTE:
I really don't think trying to emulate innerClasses in PHP is such a good idea. I think the code is less clean and readable. Also, there are probably other ways to achieve similar results using a well established pattern such as the Observer, Decorator ou COmposition Pattern. Sometimes, even simple inheritance is sufficient.
How to center images on a web page for all screen sizes
text-align:center
Applying the text-align:center style to an element containing elements will center those elements.
<div id="method-one" style="text-align:center">
CSS `text-align:center`
</div>
Thomas Shields mentions this method
margin:0 auto
Applying the margin:0 auto style to a block element will center it within the element it is in.
<div id="method-two" style="background-color:green">
<div style="margin:0 auto;width:50%;background-color:lightblue">
CSS `margin:0 auto` to have left and right margin set to center a block element within another element.
</div>
</div>
user1468562 mentions this method
Center tag
My original answer was that you can use the <center></center> tag. To do this, just place the content you want centered between the tags. As of HTML4, this tag has been deprecated, though. <center> is still technically supported today (9 years later at the time of updating this), but I'd recommend the CSS alternatives I've included above.
<h3>Method 3</h1>
<div id="method-three">
<center>Center tag (not recommended and deprecated in HTML4)</center>
</div>
You can see these three code samples in action in this jsfiddle.
I decided I should revise this answer as the previous one I gave was outdated. It was already deprecated when I suggested it as a solution and that's all the more reason to avoid it now 9 years later.
Android button with different background colors
In the URL you pointed to, the button_text.xml is being used to set the textColor attribute.That it is reason they had the button_text.xml in res/color folder and therefore they used @color/button_text.xml
But you are trying to use it for background attribute. The background attribute looks for something in res/drawable folder.
check this i got this selector custom button from the internet.I dont have the link.but i thank the poster for this.It helped me.have this in the drawable folder
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" >
<shape>
<gradient
android:startColor="@color/yellow1"
android:endColor="@color/yellow2"
android:angle="270" />
<stroke
android:width="3dp"
android:color="@color/grey05" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
<item android:state_focused="true" >
<shape>
<gradient
android:endColor="@color/orange4"
android:startColor="@color/orange5"
android:angle="270" />
<stroke
android:width="3dp"
android:color="@color/grey05" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
<item>
<shape>
<gradient
android:endColor="@color/white1"
android:startColor="@color/white2"
android:angle="270" />
<stroke
android:width="3dp"
android:color="@color/grey05" />
<corners
android:radius="3dp" />
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp" />
</shape>
</item>
</selector>
And i used in my main.xml layout like this
<Button android:id="@+id/button1"
android:layout_alignParentLeft="true"
android:layout_marginTop="150dip"
android:layout_marginLeft="45dip"
android:textSize="7pt"
android:layout_height="wrap_content"
android:layout_width="230dip"
android:text="@string/welcomebtntitle1"
android:background="@drawable/custombutton"/>
Hope this helps. Vik is correct.
EDIT : Here is the colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="yellow1">#F9E60E</color>
<color name="yellow2">#F9F89D</color>
<color name="orange4">#F7BE45</color>
<color name="orange5">#F7D896</color>
<color name="blue2">#19FCDA</color>
<color name="blue25">#D9F7F2</color>
<color name="grey05">#ACA899</color>
<color name="white1">#FFFFFF</color>
<color name="white2">#DDDDDD</color>
</resources>
Align printf output in Java
You can try the below example. Do use '-' before the width to ensure left indentation. By default they will be right indented; which may not suit your purpose.
System.out.printf("%2d. %-20s $%.2f%n", i + 1, BOOK_TYPE[i], COST[i]);
Format String Syntax: http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax
Formatting Numeric Print Output: https://docs.oracle.com/javase/tutorial/java/data/numberformat.html
PS: This could go as a comment to DwB's answer, but i still don't have permissions to comment and so answering it.
Replace multiple characters in one replace call
You can just try this :
str.replace(/[.#]/g, 'replacechar');
this will replace .,- and # with your replacechar !
Understanding Linux /proc/id/maps
Each row in /proc/$PID/maps describes a region of contiguous virtual memory in a process or thread. Each row has the following fields:
address perms offset dev inode pathname
08048000-08056000 r-xp 00000000 03:0c 64593 /usr/sbin/gpm
- address - This is the starting and ending address of the region in the process's address space
- permissions - This describes how pages in the region can be accessed. There are four different permissions: read, write, execute, and shared. If read/write/execute are disabled, a
-will appear instead of ther/w/x. If a region is not shared, it is private, so apwill appear instead of ans. If the process attempts to access memory in a way that is not permitted, a segmentation fault is generated. Permissions can be changed using themprotectsystem call. - offset - If the region was mapped from a file (using
mmap), this is the offset in the file where the mapping begins. If the memory was not mapped from a file, it's just 0. - device - If the region was mapped from a file, this is the major and minor device number (in hex) where the file lives.
- inode - If the region was mapped from a file, this is the file number.
- pathname - If the region was mapped from a file, this is the name of the file. This field is blank for anonymous mapped regions. There are also special regions with names like
[heap],[stack], or[vdso].[vdso]stands for virtual dynamic shared object. It's used by system calls to switch to kernel mode. Here's a good article about it: "What is linux-gate.so.1?"
You might notice a lot of anonymous regions. These are usually created by mmap but are not attached to any file. They are used for a lot of miscellaneous things like shared memory or buffers not allocated on the heap. For instance, I think the pthread library uses anonymous mapped regions as stacks for new threads.
How to implement and do OCR in a C# project?
I'm using tesseract OCR engine with TessNet2 (a C# wrapper - http://www.pixel-technology.com/freeware/tessnet2/).
Some basic code:
using tessnet2;
...
Bitmap image = new Bitmap(@"u:\user files\bwalker\2849257.tif");
tessnet2.Tesseract ocr = new tessnet2.Tesseract();
ocr.SetVariable("tessedit_char_whitelist", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.,$-/#&=()\"':?"); // Accepted characters
ocr.Init(@"C:\Users\bwalker\Documents\Visual Studio 2010\Projects\tessnetWinForms\tessnetWinForms\bin\Release\", "eng", false); // Directory of your tessdata folder
List<tessnet2.Word> result = ocr.DoOCR(image, System.Drawing.Rectangle.Empty);
string Results = "";
foreach (tessnet2.Word word in result)
{
Results += word.Confidence + ", " + word.Text + ", " + word.Left + ", " + word.Top + ", " + word.Bottom + ", " + word.Right + "\n";
}
How to Add a Dotted Underline Beneath HTML Text
If the content has more than 1 line, adding a bottom border won't help. In that case you'll have to use,
text-decoration: underline;
text-decoration-style: dotted;
If you want more breathing space in between the text and the line, simply use,
text-underline-position: under;
How to print table using Javascript?
My fellows,
In January 2019 I used a code made before:
<script type="text/javascript">
function imprimir() {
var divToPrint=document.getElementById("ConsutaBPM");
newWin= window.open("");
newWin.document.write(divToPrint.outerHTML);
newWin.print();
newWin.close();
}
</script>
To undestand: ConsutaBPM is a DIV which contains inside phrases and tables. I wanted to print ALL, titles, table, and others. The problem was when TRIED to print the TABLE...
The table mas be defined with BORDER and CELLPADDING:
<table border='1' cellpadding='1' id='Tablbpm1' >
It worked fine!!!
How do I run a Python script from C#?
Just also to draw your attention to this:
https://code.msdn.microsoft.com/windowsdesktop/C-and-Python-interprocess-171378ee
It works great.
Adding null values to arraylist
Yes, you can always use null instead of an object. Just be careful because some methods might throw error.
It would be 1.
also nulls would be factored in in the for loop, but you could use
for(Item i : itemList) {
if (i!= null) {
//code here
}
}
Relative div height
add this to your css:
html, body{height: 100%}
and change the max-height of #block12 to height
Explanation:
Basically #wrap was 100% height (relative measure) but when you use relative measures it looks for its parent element's measure, and it's normally undefined because it's also relative. The only element(s) being able to use a relative heights are body and or html themselves depending on the browser, the rest of the elements need a parent element with absolute height.
But be careful, it's tricky playing around with relative heights, you have to calculate properly your header's height so you can substract it from the other element's percentages.
Getting text from td cells with jQuery
I would give your tds a specific class, e.g. data-cell, and then use something like this:
$("td.data-cell").each(function () {
// 'this' is now the raw td DOM element
var txt = $(this).html();
});
Angular 2 Dropdown Options Default Value
Step: 1 Create Properties declare class
export class Task {
title: string;
priority: Array<any>;
comment: string;
constructor() {
this.title = '';
this.priority = [];
this.comment = '';
}
}
Stem: 2 Your Component Class
import { Task } from './task';
export class TaskComponent implements OnInit {
priorityList: Array<any> = [
{ value: 0, label: '?' },
{ value: 1, label: '?' },
{ value: 2, label: '??' },
{ value: 3, label: '???' },
{ value: 4, label: '????' },
{ value: 5, label: '?????' }
];
taskModel: Task = new Task();
constructor(private taskService: TaskService) { }
ngOnInit() {
this.taskModel.priority = [3]; // index number
}
}
Step: 3 View File .html
<select class="form-control" name="priority" [(ngModel)]="taskModel.priority" required>
<option *ngFor="let list of priorityList" [value]="list.value">
{{list.label}}
</option>
</select>
Output:
How to split a comma-separated value to columns
You may find the solution in SQL User Defined Function to Parse a Delimited String helpful (from The Code Project).
This is the code part from this page:
CREATE FUNCTION [fn_ParseText2Table]
(@p_SourceText VARCHAR(MAX)
,@p_Delimeter VARCHAR(100)=',' --default to comma delimited.
)
RETURNS @retTable
TABLE([Position] INT IDENTITY(1,1)
,[Int_Value] INT
,[Num_Value] NUMERIC(18,3)
,[Txt_Value] VARCHAR(MAX)
,[Date_value] DATETIME
)
AS
/*
********************************************************************************
Purpose: Parse values from a delimited string
& return the result as an indexed table
Copyright 1996, 1997, 2000, 2003 Clayton Groom (<A href="mailto:[email protected]">[email protected]</A>)
Posted to the public domain Aug, 2004
2003-06-17 Rewritten as SQL 2000 function.
Reworked to allow for delimiters > 1 character in length
and to convert Text values to numbers
2016-04-05 Added logic for date values based on "new" ISDATE() function, Updated to use XML approach, which is more efficient.
********************************************************************************
*/
BEGIN
DECLARE @w_xml xml;
SET @w_xml = N'<root><i>' + replace(@p_SourceText, @p_Delimeter,'</i><i>') + '</i></root>';
INSERT INTO @retTable
([Int_Value]
, [Num_Value]
, [Txt_Value]
, [Date_value]
)
SELECT CASE
WHEN ISNUMERIC([i].value('.', 'VARCHAR(MAX)')) = 1
THEN CAST(CAST([i].value('.', 'VARCHAR(MAX)') AS NUMERIC) AS INT)
END AS [Int_Value]
, CASE
WHEN ISNUMERIC([i].value('.', 'VARCHAR(MAX)')) = 1
THEN CAST([i].value('.', 'VARCHAR(MAX)') AS NUMERIC(18, 3))
END AS [Num_Value]
, [i].value('.', 'VARCHAR(MAX)') AS [txt_Value]
, CASE
WHEN ISDATE([i].value('.', 'VARCHAR(MAX)')) = 1
THEN CAST([i].value('.', 'VARCHAR(MAX)') AS DATETIME)
END AS [Num_Value]
FROM @w_xml.nodes('//root/i') AS [Items]([i]);
RETURN;
END;
GO
Android global variable
Try Like This:
Create a shared data class:
SharedData.java
import android.app.Application;
/**
* Created by kundan on 6/23/2015.
*/
public class Globals {
private static Globals instance = new Globals();
// Getter-Setters
public static Globals getInstance() {
return instance;
}
public static void setInstance(Globals instance) {
Globals.instance = instance;
}
private String notification_index;
private Globals() {
}
public String getValue() {
return notification_index;
}
public void setValue(String notification_index) {
this.notification_index = notification_index;
}
}
Declared/Initiaze an instance of class globally in those classes where you want to set/get data (using this code before onCreate() method):-
Globals sharedData = Globals.getInstance();
Set data:
sharedData.setValue("kundan");
Get data:
String n = sharedData.getValue();
Parse query string in JavaScript
I wanted a simple function that took a URL as an input and returned a map of the query params. If I were to improve this function, I would support the standard for array data in the URL, and or nested variables.
This should work back and for with the jQuery.param( qparams ) function.
function getQueryParams(url){
var qparams = {},
parts = (url||'').split('?'),
qparts, qpart,
i=0;
if(parts.length <= 1 ){
return qparams;
}else{
qparts = parts[1].split('&');
for(i in qparts){
qpart = qparts[i].split('=');
qparams[decodeURIComponent(qpart[0])] =
decodeURIComponent(qpart[1] || '');
}
}
return qparams;
};
How to load image (and other assets) in Angular an project?
Being specific to Angular2 to 5, we can bind image path using property binding as below. Image path is enclosed by the single quotation marks.
Sample example
<img [src]="'assets/img/klogo.png'" alt="image">
Get the device width in javascript
One issue with Bryan Rieger's useful answer is that on high-density displays, Apple devices report screen.width in dips, while Android devices report it in physical pixels. (See http://www.quirksmode.org/blog/archives/2012/07/more_about_devi.html .) I suggest using if (window.matchMedia('(max-device-width: 960px)').matches) {} on browsers supporting matchMedia.
Insert new item in array on any position in PHP
function insert(&$arr, $value, $index){
$lengh = count($arr);
if($index<0||$index>$lengh)
return;
for($i=$lengh; $i>$index; $i--){
$arr[$i] = $arr[$i-1];
}
$arr[$index] = $value;
}
Out-File -append in Powershell does not produce a new line and breaks string into characters
Out-File defaults to unicode encoding which is why you are seeing the behavior you are. Use -Encoding Ascii to change this behavior. In your case
Out-File -Encoding Ascii -append textfile.txt.
Add-Content uses Ascii and also appends by default.
"This is a test" | Add-Content textfile.txt.
As for the lack of newline: You did not send a newline so it will not write one to file.
How to fix SSL certificate error when running Npm on Windows?
TL;DR - Just run this and don't disable your security:
Replace existing certs
# Windows/MacOS/Linux
npm config set cafile "<path to your certificate file>"
# Check the 'cafile'
npm config get cafile
or extend existing certs
Set this environment variable to extend pre-defined certs:
NODE_EXTRA_CA_CERTS to "<path to certificate file>"
Full story
I've had to work with npm, pip, maven etc. behind a corporate firewall under Windows - it's not fun. I'll try and keep this platform agnostic/aware where possible.
HTTP_PROXY & HTTPS_PROXY
HTTP_PROXY & HTTPS_PROXY are environment variables used by lots of software to know where your proxy is. Under Windows, lots of software also uses your OS specified proxy which is a totally different thing. That means you can have Chrome (which uses the proxy specified in your Internet Options) connecting to the URL just fine, but npm, pip, maven etc. not working because they use HTTPS_PROXY (except when they use HTTP_PROXY - see later). Normally the environment variable would look something like:
http://proxy.example.com:3128
But you're getting a 403 which suggests you're not being authenticated against your proxy. If it is basic authentication on the proxy, you'll want to set the environment variable to something of the form:
http://user:[email protected]:3128
The dreaded NTLM
There is an HTTP status code 407 (proxy authentication required), which is the more correct way of saying it's the proxy rather than the destination server that's rejecting your request. That code plagued me for the longest time until after a lot of time on Google, I learned my proxy used NTLM authentication. HTTP basic authentication wasn't enough to satisfy whatever proxy my corporate overlords had installed. I resorted to using Cntlm on my local machine (unauthenticated), then had it handle the NTLM authentication with the upstream proxy. Then I had to tell all the programs that couldn't do NTLM to use my local machine as the proxy - which is generally as simple as setting HTTP_PROXY and HTTPS_PROXY. Otherwise, for npm use (as @Agus suggests):
npm config set proxy http://proxy.example.com:3128
npm config set https-proxy http://proxy.example.com:3128
"We need to decrypt all HTTPS traffic because viruses"
After this set-up had been humming along (clunkily) for about a year, the corporate overlords decided to change the proxy. Not only that, but it would no longer use NTLM! A brave new world to be sure. But because those writers of malicious software were now delivering malware via HTTPS, the only way they could protect we poor innocent users was to man-in-the-middle every connection to scan for threats before they even reached us. As you can imagine, I was overcome with the feeling of safety.
To cut a long story short, the self-signed certificate needs to be installed into npm to avoid SELF_SIGNED_CERT_IN_CHAIN:
npm config set cafile "<path to certificate file>"
Alternatively, the NODE_EXTRA_CA_CERTS environment variable can be set to the certificate file.
I think that's everything I know about getting npm to work behind a proxy/firewall. May someone find it useful.
Edit: It's a really common suggestion to turn off HTTPS for this problem either by using an HTTP registry or setting NODE_TLS_REJECT_UNAUTHORIZED. These are not good ideas because you're opening yourself up to further man-in-the-middle or redirection attacks. A quick spoof of your DNS records on the machine doing the package installation and you'll find yourself trusting packages from anywhere. It may seem like a lot of work to make HTTPS work, but it is highly recommended. When you're the one responsible for allowing untrusted code into the company, you'll understand why.
Edit 2:
Keep in mind that setting npm config set cafile <path> causes npm to only use the certs provided in that file, instead of extending the existing ones with it.
If you want to extend the existing certs (e.g. with a company cert) using the environment variable NODE_EXTRA_CA_CERTS to link to the file is the way to go and can save you a lot of hassle. See how-to-add-custom-certificate-authority-ca-to-nodejs
How to use relative/absolute paths in css URLs?
The URL is relative to the location of the CSS file, so this should work for you:
url('../../images/image.jpg')
The relative URL goes two folders back, and then to the images folder - it should work for both cases, as long as the structure is the same.
From https://www.w3.org/TR/CSS1/#url:
Partial URLs are interpreted relative to the source of the style sheet, not relative to the document
How to get file creation date/time in Bash/Debian?
even better:
lsct ()
{
debugfs -R 'stat <'`ls -i "$1" | (read a b;echo -n $a)`'>' `df "$1" | (read a; read a b; echo "$a")` 2> /dev/null | grep --color=auto crtime | ( read a b c d;
echo $d )
}
lsct /etc
Wed Jul 20 19:25:48 2016
convert array into DataFrame in Python
In general you can use pandas rename function here. Given your dataframe you could change to a new name like this. If you had more columns you could also rename those in the dictionary. The 0 is the current name of your column
import pandas as pd
import numpy as np
e = np.random.normal(size=100)
e_dataframe = pd.DataFrame(e)
e_dataframe.rename(index=str, columns={0:'new_column_name'})
AngularJS: how to enable $locationProvider.html5Mode with deeplinking
This was the best solution I found after more time than I care to admit. Basically, add target="_self" to each link that you need to insure a page reload.
http://blog.panjiesw.com/posts/2013/09/angularjs-normal-links-with-html5mode/
Changing Shell Text Color (Windows)
This is extremely simple! Rather than importing odd modules for python or trying long commands you can take advantage of windows OS commands.
In windows, commands exist to change the command prompt text color. You can use this in python by starting with a: import os
Next you need to have a line changing the text color, place it were you want in your code.
os.system('color 4')
You can figure out the other colors by starting cmd.exe and typing color help.
The good part? Thats all their is to it, to simple lines of code. -Day
How do I do a HTTP GET in Java?
If you dont want to use external libraries, you can use URL and URLConnection classes from standard Java API.
An example looks like this:
String urlString = "http://wherever.com/someAction?param1=value1¶m2=value2....";
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
InputStream is = conn.getInputStream();
// Do what you want with that stream
Remove Duplicates from range of cells in excel vba
To remove duplicates from a single column
Sub removeDuplicate()
'removeDuplicate Macro
Columns("A:A").Select
ActiveSheet.Range("$A$1:$A$117").RemoveDuplicates Columns:=Array(1), _
Header:=xlNo
Range("A1").Select
End Sub
if you have header then use Header:=xlYes
Increase your range as per your requirement.
you can make it to 1000 like this :
ActiveSheet.Range("$A$1:$A$1000")
More info here here
How can I create a keystore?
This tutorial:
http://techdroid.kbeanie.com/2010/02/sign-your-android-applications-for.html
was very helpful for me the first time I had to create a keystore. It is simple but the instructions on developer.android.com are a little too brief.
The part I was unsure about was where to save and what name to give the keystore file.
I seems it doesn't matter where you put it just be sure to keep it safe and keep a number of backups. I just put it in my app directory
Name the file "something.keystore" where something can be whatever you want. I used app_name.keystore, where app_name was the name of my app.
The next part was what to name the alias. Again it doesn't seem to matter so again I just used the app_name again. Keep the passwords the same as you used before. Fill out the rest of the fields and you are done.
Bootstrap Element 100% Width
I'd wonder why someone would try to "override" the container width, since its purpose is to keep its content with some padding, but I had a similar situation (that's why I wanted to share my solution, even though there're answers).
In my situation, I wanted to have all content (of all pages) rendered inside a container, so this was the piece of code from my _Layout.cshtml:
<div id="body">
@RenderSection("featured", required: false)
<section class="content-wrapper main-content clear-fix">
<div class="container">
@RenderBody()
</div>
</section>
</div>
In my Home Index page, I had a background header image I'd like to fill the whole screen width, so the solution was to make the Index.cshtml like this:
@section featured {
<!-- This content will be rendered outside the "container div" -->
<div class="intro-header">
<div class="container">SOME CONTENT WITH A NICE BACKGROUND</div>
</div>
}
<!-- The content below will be rendered INSIDE the "container div" -->
<div class="content-section-b">
<div class="container">
<div class="row">
MORE CONTENT
</div>
</div>
</div>
I think this is better than trying to make workarounds, since sections are made with the purpose of allowing (or forcing) views to dynamically replace some content in the layout.
Contains case insensitive
Here's my take:
Script:
var originalText = $("#textContainer").html()
$("#search").on('keyup', function () {
$("#textContainer").html(originalText)
var text = $("#textContainer").html()
var val = $("#search").val()
if(val=="") return;
var matches = text.split(val)
for(var i=0;i<matches.length-1;i++) {
var ind = matches[i].indexOf(val)
var len = val.length
matches[i] = matches[i] + "<span class='selected'>" + val + "</span>"
}
$("#textContainer").html(matches.join(""))
HTML:
<input type="text" id="search">
<div id="textContainer">
lorem ipsum is simply dummy text of the printing and typesetting industry. lorem ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of letraset sheets containing lorem ipsum passages, and more recently with desktop publishing software like Aldus pagemaker including versions of lorem ipsum.</div>
How do I pass a variable to the layout using Laravel' Blade templating?
You can try:
public function index()
{
return View::make('pages/index', array('title' => 'Home page'));
}
How do I load an HTML page in a <div> using JavaScript?
I finally found the answer to my problem. The solution is
function load_home() {
document.getElementById("content").innerHTML='<object type="text/html" data="home.html" ></object>';
}
How to run sql script using SQL Server Management Studio?
Open SQL Server Management Studio > File > Open > File > Choose your .sql file (the one that contains your script) > Press Open > the file will be opened within SQL Server Management Studio, Now all what you need to do is to press Execute button.
Test for array of string type in TypeScript
You can have do it easily using Array.prototype.some() as below.
const isStringArray = (test: any[]): boolean => {
return Array.isArray(test) && !test.some((value) => typeof value !== 'string')
}
const myArray = ["A", "B", "C"]
console.log(isStringArray(myArray)) // will be log true if string array
I believe this approach is better that others. That is why I am posting this answer.
Update on Sebastian Vittersø's comment
Here you can use Array.prototype.every() as well.
const isStringArray = (test: any[]): boolean => {
return Array.isArray(test) && test.every((value) => typeof value === 'string')
}
Can you display HTML5 <video> as a full screen background?
Use position:fixed on the video, set it to 100% width/height, and put a negative z-index on it so it appears behind everything.
If you look at VideoJS, the controls are just html elements sitting on top of the video, using z-index to make sure they're above.
HTML
<video id="video_background" src="video.mp4" autoplay>
(Add webm and ogg sources to support more browsers)
CSS
#video_background {
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
z-index: -1000;
}
It'll work in most HTML5 browsers, but probably not iPhone/iPad, where the video needs to be activated, and doesn't like elements over it.
How do I get the result of a command in a variable in windows?
I would like to add a remark to the above solutions:
All these syntaxes work perfectly well IF YOUR COMMAND IS FOUND WITHIN THE PATH or IF THE COMMAND IS A cmdpath WITHOUT SPACES OR SPECIAL CHARACTERS.
But if you try to use an executable command located in a folder which path contains special characters then you would need to enclose your command path into double quotes (") and then the FOR /F syntax does not work.
Examples:
$ for /f "tokens=* USEBACKQ" %f in (
`""F:\GLW7\Distrib\System\Shells and scripting\f2ko.de\folderbrowse.exe"" Hello '"F:\GLW7\Distrib\System\Shells and scripting"'`
) do echo %f
The filename, directory name, or volume label syntax is incorrect.
or
$ for /f "tokens=* USEBACKQ" %f in (
`"F:\GLW7\Distrib\System\Shells and scripting\f2ko.de\folderbrowse.exe" "Hello World" "F:\GLW7\Distrib\System\Shells and scripting"`
) do echo %f
'F:\GLW7\Distrib\System\Shells' is not recognized as an internal or external command, operable program or batch file.
or
`$ for /f "tokens=* USEBACKQ" %f in (
`""F:\GLW7\Distrib\System\Shells and scripting\f2ko.de\folderbrowse.exe"" "Hello World" "F:\GLW7\Distrib\System\Shells and scripting"`
) do echo %f
'"F:\GLW7\Distrib\System\Shells and scripting\f2ko.de\folderbrowse.exe"" "Hello' is not recognized as an internal or external command, operable program or batch file.
In that case, the only solution I found to use a command and store its result in a variable is to set (temporarily) the default directory to the one of command itself :
pushd "%~d0%~p0"
FOR /F "tokens=* USEBACKQ" %%F IN (
`FOLDERBROWSE "Hello world!" "F:\GLW7\Distrib\System\Layouts (print,display...)"`
) DO (SET MyFolder=%%F)
popd
echo My selected folder: %MyFolder%
The result is then correct:
My selected folder: F:\GLW7\Distrib\System\OS install, recovery, VM\
Press any key to continue . . .
Of course in the above example, I assume that my batch script is located in the same folder as the one of my executable command so that I can use the "%~d0%~p0" syntax. If this is not your case, then you have to find a way to locate your command path and change the default directory to its path.
NB: For those who wonder, the sample command used here (to select a folder) is FOLDERBROWSE.EXE. I found it on the web site f2ko.de (http://f2ko.de/en/cmd.php).
If anyone has a better solution for that kind of commands accessible through a complex path, I will be very glad to hear of it.
Gilles
Switch firefox to use a different DNS than what is in the windows.host file
It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site.
I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server. You can then tell Firefox to use that proxy instead of downloading pages directly.
Doing it this way, the actual DNS lookups will be done on the proxy machine and not on the machine that's running the web browser.
Install shows error in console: INSTALL FAILED CONFLICTING PROVIDER
It helped me: Go AndroidManifest and paste or replace with this code
<provider
android:authorities="${applicationId}.here.this.library.provider"
android:name="androidx.core.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true"
tools:replace="android:authorities" >
</provider>
Pythonic way to check if a list is sorted or not
As noted by @aaronsterling the following solution is the shortest and seems fastest when the array is sorted and not too small: def is_sorted(lst): return (sorted(lst) == lst)
If most of the time the array is not sorted, it would be desirable to use a solution that does not scan the entire array and returns False as soon as an unsorted prefix is discovered. Following is the fastest solution I could find, it is not particularly elegant:
def is_sorted(lst):
it = iter(lst)
try:
prev = it.next()
except StopIteration:
return True
for x in it:
if prev > x:
return False
prev = x
return True
Using Nathan Farrington's benchmark, this achieves better runtime than using sorted(lst) in all cases except when running on the large sorted list.
Here are the benchmark results on my computer.
sorted(lst)==lst solution
- L1: 1.23838591576
- L2: 4.19063091278
- L3: 1.17996287346
- L4: 4.68399500847
Second solution:
- L1: 0.81095790863
- L2: 0.802397012711
- L3: 1.06135106087
- L4: 8.82761001587
How to remove extension from string (only real extension!)
http://php.net/manual/en/function.pathinfo.php
$filename = pathinfo('filename.md.txt', PATHINFO_FILENAME); // returns 'filename.md'
Formatting struct timespec
I wanted to ask the same question. Here is my current solution to obtain a string like this: 2013-02-07 09:24:40.749355372
I am not sure if there is a more straight forward solution than this, but at least the string format is freely configurable with this approach.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define NANO 1000000000L
// buf needs to store 30 characters
int timespec2str(char *buf, uint len, struct timespec *ts) {
int ret;
struct tm t;
tzset();
if (localtime_r(&(ts->tv_sec), &t) == NULL)
return 1;
ret = strftime(buf, len, "%F %T", &t);
if (ret == 0)
return 2;
len -= ret - 1;
ret = snprintf(&buf[strlen(buf)], len, ".%09ld", ts->tv_nsec);
if (ret >= len)
return 3;
return 0;
}
int main(int argc, char **argv) {
clockid_t clk_id = CLOCK_REALTIME;
const uint TIME_FMT = strlen("2012-12-31 12:59:59.123456789") + 1;
char timestr[TIME_FMT];
struct timespec ts, res;
clock_getres(clk_id, &res);
clock_gettime(clk_id, &ts);
if (timespec2str(timestr, sizeof(timestr), &ts) != 0) {
printf("timespec2str failed!\n");
return EXIT_FAILURE;
} else {
unsigned long resol = res.tv_sec * NANO + res.tv_nsec;
printf("CLOCK_REALTIME: res=%ld ns, time=%s\n", resol, timestr);
return EXIT_SUCCESS;
}
}
output:
gcc mwe.c -lrt
$ ./a.out
CLOCK_REALTIME: res=1 ns, time=2013-02-07 13:41:17.994326501
How to install Python package from GitHub?
To install Python package from github, you need to clone that repository.
git clone https://github.com/jkbr/httpie.git
Then just run the setup.py file from that directory,
sudo python setup.py install
How to let an ASMX file output JSON
A quick gotcha that I learned the hard way (basically spending 4 hours on Google), you can use PageMethods in your ASPX file to return JSON (with the [ScriptMethod()] marker) for a static method, however if you decide to move your static methods to an asmx file, it cannot be a static method.
Also, you need to tell the web service Content-Type: application/json in order to get JSON back from the call (I'm using jQuery and the 3 Mistakes To Avoid When Using jQuery article was very enlightening - its from the same website mentioned in another answer here).
Select DataFrame rows between two dates
With my testing of pandas version 0.22.0 you can now answer this question easier with more readable code by simply using between.
# create a single column DataFrame with dates going from Jan 1st 2018 to Jan 1st 2019
df = pd.DataFrame({'dates':pd.date_range('2018-01-01','2019-01-01')})
Let's say you want to grab the dates between Nov 27th 2018 and Jan 15th 2019:
# use the between statement to get a boolean mask
df['dates'].between('2018-11-27','2019-01-15', inclusive=False)
0 False
1 False
2 False
3 False
4 False
# you can pass this boolean mask straight to loc
df.loc[df['dates'].between('2018-11-27','2019-01-15', inclusive=False)]
dates
331 2018-11-28
332 2018-11-29
333 2018-11-30
334 2018-12-01
335 2018-12-02
Notice the inclusive argument. very helpful when you want to be explicit about your range. notice when set to True we return Nov 27th of 2018 as well:
df.loc[df['dates'].between('2018-11-27','2019-01-15', inclusive=True)]
dates
330 2018-11-27
331 2018-11-28
332 2018-11-29
333 2018-11-30
334 2018-12-01
This method is also faster than the previously mentioned isin method:
%%timeit -n 5
df.loc[df['dates'].between('2018-11-27','2019-01-15', inclusive=True)]
868 µs ± 164 µs per loop (mean ± std. dev. of 7 runs, 5 loops each)
%%timeit -n 5
df.loc[df['dates'].isin(pd.date_range('2018-01-01','2019-01-01'))]
1.53 ms ± 305 µs per loop (mean ± std. dev. of 7 runs, 5 loops each)
However, it is not faster than the currently accepted answer, provided by unutbu, only if the mask is already created. but if the mask is dynamic and needs to be reassigned over and over, my method may be more efficient:
# already create the mask THEN time the function
start_date = dt.datetime(2018,11,27)
end_date = dt.datetime(2019,1,15)
mask = (df['dates'] > start_date) & (df['dates'] <= end_date)
%%timeit -n 5
df.loc[mask]
191 µs ± 28.5 µs per loop (mean ± std. dev. of 7 runs, 5 loops each)
Delete column from pandas DataFrame
As you've guessed, the right syntax is
del df['column_name']
It's difficult to make del df.column_name work simply as the result of syntactic limitations in Python. del df[name] gets translated to df.__delitem__(name) under the covers by Python.
Python: json.loads returns items prefixing with 'u'
The d3 print below is the one you are looking for (which is the combination of dumps and loads) :)
Having:
import json
d = """{"Aa": 1, "BB": "blabla", "cc": "False"}"""
d1 = json.loads(d) # Produces a dictionary out of the given string
d2 = json.dumps(d) # Produces a string out of a given dict or string
d3 = json.dumps(json.loads(d)) # 'dumps' gets the dict from 'loads' this time
print "d1: " + str(d1)
print "d2: " + d2
print "d3: " + d3
Prints:
d1: {u'Aa': 1, u'cc': u'False', u'BB': u'blabla'}
d2: "{\"Aa\": 1, \"BB\": \"blabla\", \"cc\": \"False\"}"
d3: {"Aa": 1, "cc": "False", "BB": "blabla"}
ImportError: No Module Named bs4 (BeautifulSoup)
Addendum to the original query: modules.py
help('modules')
$python modules.py
It lists that module bs4 already been installed.
_codecs_kr blinker json six
_codecs_tw brotli kaitaistruct smtpd
_collections bs4 keyword smtplib
_collections_abc builtins ldap3 sndhdr
_compat_pickle bz2 lib2to3 socket
Proper solution is:
pip install --upgrade bs4
Should solve the problem.
Not only that, it will show same error for other modules as well. So you got to issue the pip command same way as above for those errored module(s).
Android: how to create Switch case from this?
You can do this:
@Override
protected Dialog onCreateDialog(int id) {
String messageDialog;
String valueOK;
String valueCancel;
String titleDialog;
switch (id) {
case id:
titleDialog = itemTitle;
messageDialog = itemDescription
valueOK = "OK";
return new AlertDialog.Builder(HomeView.this).setTitle(titleDialog).setPositiveButton(valueOK, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Log.d(this.getClass().getName(), "AlertItem");
}
}).setMessage(messageDialog).create();
and then call to
showDialog(numbreOfItem);
Color different parts of a RichTextBox string
This is the modified version that I put in my code (I'm using .Net 4.5) but I think it should work on 4.0 too.
public void AppendText(string text, Color color, bool addNewLine = false)
{
box.SuspendLayout();
box.SelectionColor = color;
box.AppendText(addNewLine
? $"{text}{Environment.NewLine}"
: text);
box.ScrollToCaret();
box.ResumeLayout();
}
Differences with original one:
- possibility to add text to a new line or simply append it
- no need to change selection, it works the same
- inserted ScrollToCaret to force autoscroll
- added suspend/resume layout calls
Mockito How to mock only the call of a method of the superclass
No, Mockito does not support this.
This might not be the answer you're looking for, but what you're seeing is a symptom of not applying the design principle:
If you extract a strategy instead of extending a super class the problem is gone.
If however you are not allowed to change the code, but you must test it anyway, and in this awkward way, there is still hope. With some AOP tools (for example AspectJ) you can weave code into the super class method and avoid its execution entirely (yuck). This doesn't work if you're using proxies, you have to use bytecode modification (either load time weaving or compile time weaving). There are be mocking frameworks that support this type of trick as well, like PowerMock and PowerMockito.
I suggest you go for the refactoring, but if that is not an option you're in for some serious hacking fun.
Python dict how to create key or append an element to key?
You can use a defaultdict for this.
from collections import defaultdict
d = defaultdict(list)
d['key'].append('mykey')
This is slightly more efficient than setdefault since you don't end up creating new lists that you don't end up using. Every call to setdefault is going to create a new list, even if the item already exists in the dictionary.
SET versus SELECT when assigning variables?
Aside from the one being ANSI and speed etc., there is a very important difference that always matters to me; more than ANSI and speed. The number of bugs I have fixed due to this important overlook is large. I look for this during code reviews all the time.
-- Arrange
create table Employee (EmployeeId int);
insert into dbo.Employee values (1);
insert into dbo.Employee values (2);
insert into dbo.Employee values (3);
-- Act
declare @employeeId int;
select @employeeId = e.EmployeeId from dbo.Employee e;
-- Assert
-- This will print 3, the last EmployeeId from the query (an arbitrary value)
-- Almost always, this is not what the developer was intending.
print @employeeId;
Almost always, that is not what the developer is intending. In the above, the query is straight forward but I have seen queries that are quite complex and figuring out whether it will return a single value or not, is not trivial. The query is often more complex than this and by chance it has been returning single value. During developer testing all is fine. But this is like a ticking bomb and will cause issues when the query returns multiple results. Why? Because it will simply assign the last value to the variable.
Now let's try the same thing with SET:
-- Act
set @employeeId = (select e.EmployeeId from dbo.Employee e);
You will receive an error:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
That is amazing and very important because why would you want to assign some trivial "last item in result" to the @employeeId. With select you will never get any error and you will spend minutes, hours debugging.
Perhaps, you are looking for a single Id and SET will force you to fix your query. Thus you may do something like:
-- Act
-- Notice the where clause
set @employeeId = (select e.EmployeeId from dbo.Employee e where e.EmployeeId = 1);
print @employeeId;
Cleanup
drop table Employee;
In conclusion, use:
SET: When you want to assign a single value to a variable and your variable is for a single value.SELECT: When you want to assign multiple values to a variable. The variable may be a table, temp table or table variable etc.
How to create a file with a given size in Linux?
You can do it programmatically:
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
int main() {
int fd = creat("/tmp/foo.txt", 0644);
ftruncate(fd, SIZE_IN_BYTES);
close(fd);
return 0;
}
This approach is especially useful to subsequently mmap the file into memory.
use the following command to check that the file has the correct size:
# du -B1 --apparent-size /tmp/foo.txt
Be careful:
# du /tmp/foo.txt
will probably print 0 because it is allocated as Sparse file if supported by your filesystem.
see also: man 2 open and man 2 truncate
Maven: How to rename the war file for the project?
You need to configure the war plugin:
<project>
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<warName>bird.war</warName>
</configuration>
</plugin>
</plugins>
</build>
...
</project>
More info here
C++ Returning reference to local variable
A good thing to remember are these simple rules, and they apply to both parameters and return types...
- Value - makes a copy of the item in question.
- Pointer - refers to the address of the item in question.
- Reference - is literally the item in question.
There is a time and place for each, so make sure you get to know them. Local variables, as you've shown here, are just that, limited to the time they are locally alive in the function scope. In your example having a return type of int* and returning &i would have been equally incorrect. You would be better off in that case doing this...
void func1(int& oValue)
{
oValue = 1;
}
Doing so would directly change the value of your passed in parameter. Whereas this code...
void func1(int oValue)
{
oValue = 1;
}
would not. It would just change the value of oValue local to the function call. The reason for this is because you'd actually be changing just a "local" copy of oValue, and not oValue itself.
Create a .txt file if doesn't exist, and if it does append a new line
File.AppendAllText adds a string to a file. It also creates a text file if the file does not exist. If you don't need to read content, it's very efficient. The use case is logging.
File.AppendAllText("C:\\log.txt", "hello world\n");
Sieve of Eratosthenes - Finding Primes Python
By combining contributions from many enthusiasts (including Glenn Maynard and MrHIDEn from above comments), I came up with following piece of code in python 2:
def simpleSieve(sieveSize):
#creating Sieve.
sieve = [True] * (sieveSize+1)
# 0 and 1 are not considered prime.
sieve[0] = False
sieve[1] = False
for i in xrange(2,int(math.sqrt(sieveSize))+1):
if sieve[i] == False:
continue
for pointer in xrange(i**2, sieveSize+1, i):
sieve[pointer] = False
# Sieve is left with prime numbers == True
primes = []
for i in xrange(sieveSize+1):
if sieve[i] == True:
primes.append(i)
return primes
sieveSize = input()
primes = simpleSieve(sieveSize)
Time taken for computation on my machine for different inputs in power of 10 is:
- 3 : 0.3 ms
- 4 : 2.4 ms
- 5 : 23 ms
- 6 : 0.26 s
- 7 : 3.1 s
- 8 : 33 s
Accessing Arrays inside Arrays In PHP
If $a is the array that's passed, $a[76][0]['id'] should give '76' and $a[76][1]['id'] should give '81', but I can't test as I don't have PHP installed on this machine.
What data type to use for hashed password field and what length?
You might find this Wikipedia article on salting worthwhile. The idea is to add a set bit of data to randomize your hash value; this will protect your passwords from dictionary attacks if someone gets unauthorized access to the password hashes.
"Fade" borders in CSS
Add this class css to your style sheet
.border_gradient {
border: 8px solid #000;
-moz-border-bottom-colors:#897048 #917953 #a18a66 #b6a488 #c5b59b #d4c5ae #e2d6c4 #eae1d2;
-moz-border-top-colors:#897048 #917953 #a18a66 #b6a488 #c5b59b #d4c5ae #e2d6c4 #eae1d2;
-moz-border-left-colors:#897048 #917953 #a18a66 #b6a488 #c5b59b #d4c5ae #e2d6c4 #eae1d2;
-moz-border-right-colors:#897048 #917953 #a18a66 #b6a488 #c5b59b #d4c5ae #e2d6c4 #eae1d2;
padding: 5px 5px 5px 15px;
width: 300px;
}
set width to the width of your image. and use this html for image
<div class="border_gradient">
<img src="image.png" />
</div>
though it may not give the same exact border, it will some gradient looks on the border.
source: CSS3 Borders
Calculate the mean by group
2015 update with dplyr:
df %>% group_by(dive) %>% summarise(percentage = mean(speed))
Source: local data frame [2 x 2]
dive percentage
1 dive1 0.4777462
2 dive2 0.6726483
CocoaPods Errors on Project Build
if you added new target after creating Podfile, just delete Podfile, Podfile.lock , Pods folder and workspace then init pods ->then put your pods pod install
How to check if a string array contains one string in JavaScript?
You can use the indexOfmethod and "extend" the Array class with the method contains like this:
Array.prototype.contains = function(element){
return this.indexOf(element) > -1;
};
with the following results:
["A", "B", "C"].contains("A") equals true
["A", "B", "C"].contains("D") equals false
Detect when a window is resized using JavaScript ?
You can use .resize() to get every time the width/height actually changes, like this:
$(window).resize(function() {
//resize just happened, pixels changed
});
You can view a working demo here, it takes the new height/width values and updates them in the page for you to see. Remember the event doesn't really start or end, it just "happens" when a resize occurs...there's nothing to say another one won't happen.
Edit: By comments it seems you want something like a "on-end" event, the solution you found does this, with a few exceptions (you can't distinguish between a mouse-up and a pause in a cross-browser way, the same for an end vs a pause). You can create that event though, to make it a bit cleaner, like this:
$(window).resize(function() {
if(this.resizeTO) clearTimeout(this.resizeTO);
this.resizeTO = setTimeout(function() {
$(this).trigger('resizeEnd');
}, 500);
});
You could have this is a base file somewhere, whatever you want to do...then you can bind to that new resizeEnd event you're triggering, like this:
$(window).bind('resizeEnd', function() {
//do something, window hasn't changed size in 500ms
});
How to ignore files/directories in TFS for avoiding them to go to central source repository?
If you're using local workspaces (TFS 2012+) you can now use the .tfignore file to exclude local folders and files from being checked in.
If you add that file to source control you can ensure others on your team share the same exclusion settings.
Full details on MSDN - http://msdn.microsoft.com/en-us/library/ms245454.aspx#tfignore
For the lazy:
You can configure which kinds of files are ignored by placing a text file called
.tfignorein the folder where you want rules to apply. The effects of the.tfignorefile are recursive. However, you can create .tfignore files in sub-folders to override the effects of a.tfignorefile in a parent folder.The following rules apply to a .tfignore file:
#begins a comment line- The * and ? wildcards are supported.
- A filespec is recursive unless prefixed by the \ character.
- ! negates a filespec (files that match the pattern are not ignored)
Example file:
# Ignore .cpp files in the ProjA sub-folder and all its subfolders
ProjA\*.cpp
#
# Ignore .txt files in this folder
\*.txt
#
# Ignore .xml files in this folder and all its sub-folders
*.xml
#
# Ignore all files in the Temp sub-folder
\Temp
#
# Do not ignore .dll files in this folder nor in any of its sub-folders
!*.dll
Alternative to iFrames with HTML5
You can use object and embed, like so:
<object data="http://www.web-source.net" width="600" height="400">
<embed src="http://www.web-source.net" width="600" height="400"> </embed>
Error: Embedded data could not be displayed.
</object>
Which isn't new, but still works. I'm not sure if it has the same functionality though.
How do I conditionally add attributes to React components?
Let’s say we want to add a custom property (using aria-* or data-*) if a condition is true:
{...this.props.isTrue && {'aria-name' : 'something here'}}
Let’s say we want to add a style property if a condition is true:
{...this.props.isTrue && {style : {color: 'red'}}}
How to convert a String to a Date using SimpleDateFormat?
You have used some type errors. If you want to set 08/16/2011 to following pattern. It is wrong because,
mm stands for minutes, use MM as it is for Months
DD is wrong, it should be dd which represents Days
Try this to achieve the output you want to get ( Tue Aug 16 "Whatever Time" IST 2011 ),
String date = "08/16/2011"; //input date as String
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM/dd/yyyy"); // date pattern
Date myDate = simpleDateFormat.parse(date); // returns date object
System.out.println(myDate); //outputs: Tue Aug 16 00:00:00 IST 2011
android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()
Here my solution:
in Manifest.xml
<application
android:name=".main.MainApp"
android:allowBackup="true"
android:icon="@drawable/ic_app"
android:label="@string/application_name"
android:logo="@drawable/ic_app_logo"
android:theme="@style/MainAppBaseTheme">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
in res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
in my fragment I has the next code:
Uri myPhotoFileUri = FileProvider.getUriForFile(getActivity(), getActivity().getApplicationContext().getPackageName() + ".provider", myPhotoFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.putExtra(MediaStore.EXTRA_OUTPUT, myPhotoFileUri);
?hat's all you need.
Also not need to create
public class GenericFileProvider extends FileProvider {}
I test on Android 5.0, 6.0 and Android 9.0 and it's success work.
Can you change what a symlink points to after it is created?
Yes, you can!
$ ln -sfn source_file_or_directory_name softlink_name
How to include another XHTML in XHTML using JSF 2.0 Facelets?
Included page:
<!-- opening and closing tags of included page -->
<ui:composition ...>
</ui:composition>
Including page:
<!--the inclusion line in the including page with the content-->
<ui:include src="yourFile.xhtml"/>
- You start your included xhtml file with
ui:compositionas shown above. - You include that file with
ui:includein the including xhtml file as also shown above.
Error: Microsoft Visual C++ 10.0 is required (Unable to find vcvarsall.bat) when running Python script
you have to check your pip package to be updated to the latest version in your pycharm and then install numpy package. in settings -> project:progLangComp -> Project Interpreter there is a table of packages and their current version (just labelled as Version) and their latest version (labelled as Latest). Pip current version number should be the same as latest version. If you see a blue arrow in front of pip, you have to update it to the latest then trying to install numpy or any other packages that you couldn't install, for me it was pandas which I wanted to install.
How to make method call another one in classes?
Because the Method2 is static, all you have to do is call like this:
public class AllMethods
{
public static void Method2()
{
// code here
}
}
class Caller
{
public static void Main(string[] args)
{
AllMethods.Method2();
}
}
If they are in different namespaces you will also need to add the namespace of AllMethods to caller.cs in a using statement.
If you wanted to call an instance method (non-static), you'd need an instance of the class to call the method on. For example:
public class MyClass
{
public void InstanceMethod()
{
// ...
}
}
public static void Main(string[] args)
{
var instance = new MyClass();
instance.InstanceMethod();
}
Update
As of C# 6, you can now also achieve this with using static directive to call static methods somewhat more gracefully, for example:
// AllMethods.cs
namespace Some.Namespace
{
public class AllMethods
{
public static void Method2()
{
// code here
}
}
}
// Caller.cs
using static Some.Namespace.AllMethods;
namespace Other.Namespace
{
class Caller
{
public static void Main(string[] args)
{
Method2(); // No need to mention AllMethods here
}
}
}
Further Reading
Editing legend (text) labels in ggplot
The legend titles can be labeled by specific aesthetic.
This can be achieved using the guides() or labs() functions from ggplot2 (more here and here). It allows you to add guide/legend properties using the aesthetic mapping.
Here's an example using the mtcars data set and labs():
ggplot(mtcars, aes(x=mpg, y=disp, size=hp, col=as.factor(cyl), shape=as.factor(gear))) +
geom_point() +
labs(x="miles per gallon", y="displacement", size="horsepower",
col="# of cylinders", shape="# of gears")
Answering the OP's question using guides():
# transforming the data from wide to long
require(reshape2)
dfm <- melt(df, id="TY")
# creating a scatterplot
ggplot(data = dfm, aes(x=TY, y=value, color=variable)) +
geom_point(size=5) +
labs(title="Temperatures\n", x="TY [°C]", y="Txxx") +
scale_color_manual(labels = c("T999", "T888"), values = c("blue", "red")) +
theme_bw() +
guides(color=guide_legend("my title")) # add guide properties by aesthetic
Jackson Vs. Gson
Jackson and Gson are the most complete Java JSON packages regarding actual data binding support; many other packages only provide primitive Map/List (or equivalent tree model) binding. Both have complete support for generic types, as well, as enough configurability for many common use cases.
Since I am more familiar with Jackson, here are some aspects where I think Jackson has more complete support than Gson (apologies if I miss a Gson feature):
- Extensive annotation support; including full inheritance, and advanced "mix-in" annotations (associate annotations with a class for cases where you can not directly add them)
- Streaming (incremental) reading, writing, for ultra-high performance (or memory-limited) use cases; can mix with data binding (bind sub-trees) -- EDIT: latest versions of Gson also include streaming reader
- Tree model (DOM-like access); can convert between various models (tree <-> java object <-> stream)
- Can use any constructors (or static factory methods), not just default constructor
- Field and getter/setter access (earlier gson versions only used fields, this may have changed)
- Out-of-box JAX-RS support
- Interoperability: can also use JAXB annotations, has support/work-arounds for common packages (joda, ibatis, cglib), JVM languages (groovy, clojure, scala)
- Ability to force static (declared) type handling for output
- Support for deserializing polymorphic types (Jackson 1.5) -- can serialize AND deserialize things like List correctly (with additional type information)
- Integrated support for binary content (base64 to/from JSON Strings)
How to parse XML in Bash?
Yuzem's method can be improved by inversing the order of the < and > signs in the rdom function and the variable assignments, so that:
rdom () { local IFS=\> ; read -d \< E C ;}
becomes:
rdom () { local IFS=\< ; read -d \> C E ;}
If the parsing is not done like this, the last tag in the XML file is never reached. This can be problematic if you intend to output another XML file at the end of the while loop.
Only on Firefox "Loading failed for the <script> with source"
This could also be a simple syntax error. I had a syntax error which threw on FF but not Chrome as follows:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
defer
</script>
show all tags in git log
Note: the commit 5e1361c from brian m. carlson (bk2204) (for git 1.9/2.0 Q1 2014) deals with a special case in term of log decoration with tags:
log: properly handle decorations with chained tags
git logdid not correctly handle decorations when a tag object referenced another tag object that was no longer a ref, such as when the second tag was deleted.
The commit would not be decorated correctly becauseparse_objecthad not been called on the second tag and therefore its tagged field had not been filled in, resulting in none of the tags being associated with the relevant commit.Call
parse_objectto fill in this field if it is absent so that the chain of tags can be dereferenced and the commit can be properly decorated.
Include tests as well to prevent future regressions.
Example:
git tag -a tag1 -m tag1 &&
git tag -a tag2 -m tag2 tag1 &&
git tag -d tag1 &&
git commit --amend -m shorter &&
git log --no-walk --tags --pretty="%H %d" --decorate=full
Synchronous Requests in Node.js
See sync-request: https://github.com/ForbesLindesay/sync-request
Example:
var request = require('sync-request');
var res = request('GET', 'http://example.com');
console.log(res.getBody());
How to align matching values in two columns in Excel, and bring along associated values in other columns
assuming the item numbers are unique, a VLOOKUP should get you the information you need.
first value would be =VLOOKUP(E1,A:B,2,FALSE), and the same type of formula to retrieve the second value would be =VLOOKUP(E1,C:D,2,FALSE). Wrap them in an IFERROR if you want to return anything other than #N/A if there is no corresponding value in the item column(s)
How to parse a JSON string to an array using Jackson
I sorted this problem by verifying the json on JSONLint.com and then using Jackson. Below is the code for the same.
Main Class:-
String jsonStr = "[{\r\n" + " \"name\": \"John\",\r\n" + " \"city\": \"Berlin\",\r\n"
+ " \"cars\": [\r\n" + " \"FIAT\",\r\n" + " \"Toyata\"\r\n"
+ " ],\r\n" + " \"job\": \"Teacher\"\r\n" + " },\r\n" + " {\r\n"
+ " \"name\": \"Mark\",\r\n" + " \"city\": \"Oslo\",\r\n" + " \"cars\": [\r\n"
+ " \"VW\",\r\n" + " \"Toyata\"\r\n" + " ],\r\n"
+ " \"job\": \"Doctor\"\r\n" + " }\r\n" + "]";
ObjectMapper mapper = new ObjectMapper();
MyPojo jsonObj[] = mapper.readValue(jsonStr, MyPojo[].class);
for (MyPojo itr : jsonObj) {
System.out.println("Val of getName is: " + itr.getName());
System.out.println("Val of getCity is: " + itr.getCity());
System.out.println("Val of getJob is: " + itr.getJob());
System.out.println("Val of getCars is: " + itr.getCars() + "\n");
}
POJO:
public class MyPojo {
private List<String> cars = new ArrayList<String>();
private String name;
private String job;
private String city;
public List<String> getCars() {
return cars;
}
public void setCars(List<String> cars) {
this.cars = cars;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
} }
RESULT:-
Val of getName is: John
Val of getCity is: Berlin
Val of getJob is: Teacher
Val of getCars is: [FIAT, Toyata]
Val of getName is: Mark
Val of getCity is: Oslo
Val of getJob is: Doctor
Val of getCars is: [VW, Toyata]
MessageBox with YesNoCancel - No & Cancel triggers same event
The way I use a yes/no prompt is:
If MsgBox("Are you sure?", MsgBoxStyle.YesNo) <> MsgBoxResults.Yes Then
Exit Sub
End If
Convert a file path to Uri in Android
Below code works fine before 18 API :-
public String getRealPathFromURI(Uri contentUri) {
// can post image
String [] proj={MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery( contentUri,
proj, // Which columns to return
null, // WHERE clause; which rows to return (all rows)
null, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
below code use on kitkat :-
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] {
split[1]
};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
see below link for more info:-
Execute a terminal command from a Cocoa app
fork, exec, and wait should work, if you're not really looking for a Objective-C specific way. fork creates a copy of the currently running program, exec replaces the currently running program with a new one, and wait waits for the subprocess to exit. For example (without any error checking):
#include <stdlib.h>
#include <unistd.h>
pid_t p = fork();
if (p == 0) {
/* fork returns 0 in the child process. */
execl("/other/program/to/run", "/other/program/to/run", "foo", NULL);
} else {
/* fork returns the child's PID in the parent. */
int status;
wait(&status);
/* The child has exited, and status contains the way it exited. */
}
/* The child has run and exited by the time execution gets to here. */
There's also system, which runs the command as if you typed it from the shell's command line. It's simpler, but you have less control over the situation.
I'm assuming you're working on a Mac application, so the links are to Apple's documentation for these functions, but they're all POSIX, so you should be to use them on any POSIX-compliant system.
How to solve '...is a 'type', which is not valid in the given context'? (C#)
You forgot to specify the variable name. It should be CERas.CERAS newCeras = new CERas.CERAS();
Join two data frames, select all columns from one and some columns from the other
Not sure if the most efficient way, but this worked for me:
from pyspark.sql.functions import col
df1.alias('a').join(df2.alias('b'),col('b.id') == col('a.id')).select([col('a.'+xx) for xx in a.columns] + [col('b.other1'),col('b.other2')])
The trick is in:
[col('a.'+xx) for xx in a.columns] : all columns in a
[col('b.other1'),col('b.other2')] : some columns of b
How to fill in form field, and submit, using javascript?
You can try something like this:
<script type="text/javascript">
function simulateLogin(userName)
{
var userNameField = document.getElementById("username");
userNameField.value = userName;
var goButton = document.getElementById("go");
goButton.click();
}
simulateLogin("testUser");
</script>
Switching users inside Docker image to a non-root user
You should also be able to do:
apt install sudo
sudo -i -u tomcat
Then you should be the tomcat user. It's not clear which Linux distribution you're using, but this works with Ubuntu 18.04 LTS, for example.
How to read a Parquet file into Pandas DataFrame?
Update: since the time I answered this there has been a lot of work on this look at Apache Arrow for a better read and write of parquet. Also: http://wesmckinney.com/blog/python-parquet-multithreading/
There is a python parquet reader that works relatively well: https://github.com/jcrobak/parquet-python
It will create python objects and then you will have to move them to a Pandas DataFrame so the process will be slower than pd.read_csv for example.
Facebook login message: "URL Blocked: This redirect failed because the redirect URI is not whitelisted in the app’s Client OAuth Settings."
Login Helper of your site
$loginUrl = $helper->getLoginUrl('xyz.com/user_by_facebook/', $permissions);
and in facebook application dashboard (Under products tab : Facebook Login )
Valid OAuth redirect URIs should also be same to xyz.com/user_by_facebook/
as mentioned earlier while making request from web
Python: maximum recursion depth exceeded while calling a Python object
this turns the recursion in to a loop:
def checkNextID(ID):
global numOfRuns, curRes, lastResult
while ID < lastResult:
try:
numOfRuns += 1
if numOfRuns % 10 == 0:
time.sleep(3) # sleep every 10 iterations
if isValid(ID + 8):
parseHTML(curRes)
ID = ID + 8
elif isValid(ID + 18):
parseHTML(curRes)
ID = ID + 18
elif isValid(ID + 7):
parseHTML(curRes)
ID = ID + 7
elif isValid(ID + 17):
parseHTML(curRes)
ID = ID + 17
elif isValid(ID+6):
parseHTML(curRes)
ID = ID + 6
elif isValid(ID + 16):
parseHTML(curRes)
ID = ID + 16
else:
ID = ID + 1
except Exception, e:
print "somethin went wrong: " + str(e)
Split array into two parts without for loop in java
Splits an array in multiple arrays with a fixed maximum size.
public static <T extends Object> List<T[]> splitArray(T[] array, int max){
int x = array.length / max;
int r = (array.length % max); // remainder
int lower = 0;
int upper = 0;
List<T[]> list = new ArrayList<T[]>();
int i=0;
for(i=0; i<x; i++){
upper += max;
list.add(Arrays.copyOfRange(array, lower, upper));
lower = upper;
}
if(r > 0){
list.add(Arrays.copyOfRange(array, lower, (lower + r)));
}
return list;
}
Example - an Array of 11 shall be splitted into multiple Arrays not exceeding a size of 5:
// create and populate an array
Integer[] arr = new Integer[11];
for(int i=0; i<arr.length; i++){
arr[i] = i;
}
// split into pieces with a max. size of 5
List<Integer[]> list = ArrayUtil.splitArray(arr, 5);
// check
for(int i=0; i<list.size(); i++){
System.out.println("Array " + i);
for(int j=0; j<list.get(i).length; j++){
System.out.println(" " + list.get(i)[j]);
}
}
Output:
Array 0
0
1
2
3
4
Array 1
5
6
7
8
9
Array 2
10
How to remove close button on the jQuery UI dialog?
Once you have called .dialog() on an element, you can locate the close button (and other dialog markup) at any convenient time without using event handlers:
$("#div2").dialog({ // call .dialog method to create the dialog markup
autoOpen: false
});
$("#div2").dialog("widget") // get the dialog widget element
.find(".ui-dialog-titlebar-close") // find the close button for this dialog
.hide(); // hide it
Alternate method:
Inside dialog event handlers, this refers to the element being "dialogged" and $(this).parent() refers to the dialog markup container, so:
$("#div3").dialog({
open: function() { // open event handler
$(this) // the element being dialogged
.parent() // get the dialog widget element
.find(".ui-dialog-titlebar-close") // find the close button for this dialog
.hide(); // hide it
}
});
FYI, dialog markup looks like this:
<div class="ui-dialog ui-widget ui-widget-content ui-corner-all ui-draggable ui-resizable">
<!-- ^--- this is the dialog widget -->
<div class="ui-dialog-titlebar ui-widget-header ui-corner-all ui-helper-clearfix">
<span class="ui-dialog-title" id="ui-dialog-title-dialog">Dialog title</span>
<a class="ui-dialog-titlebar-close ui-corner-all" href="#"><span class="ui-icon ui-icon-closethick">close</span></a>
</div>
<div id="div2" style="height: 200px; min-height: 200px; width: auto;" class="ui-dialog-content ui-widget-content">
<!-- ^--- this is the element upon which .dialog() was called -->
</div>
</div>
How are echo and print different in PHP?
They are:
- print only takes one parameter, while echo can have multiple parameters.
- print returns a value (1), so can be used as an expression.
- echo is slightly faster.
Sorting options elements alphabetically using jQuery
Yes you can sort the options by its text and append it back to the select box.
function NASort(a, b) {
if (a.innerHTML == 'NA') {
return 1;
}
else if (b.innerHTML == 'NA') {
return -1;
}
return (a.innerHTML > b.innerHTML) ? 1 : -1;
};
Function ereg_replace() is deprecated - How to clear this bug?
IIRC they suggest using the preg_ functions instead (in this case, preg_replace).
Richtextbox wpf binding
Create a UserControl which has a RichTextBox named RTB. Now add the following dependency property:
public FlowDocument Document
{
get { return (FlowDocument)GetValue(DocumentProperty); }
set { SetValue(DocumentProperty, value); }
}
public static readonly DependencyProperty DocumentProperty =
DependencyProperty.Register("Document", typeof(FlowDocument), typeof(RichTextBoxControl), new PropertyMetadata(OnDocumentChanged));
private static void OnDocumentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RichTextBoxControl control = (RichTextBoxControl) d;
FlowDocument document = e.NewValue as FlowDocument;
if (document == null)
{
control.RTB.Document = new FlowDocument(); //Document is not amused by null :)
}
else
{
control.RTB.Document = document;
}
}
This solution is probably that "proxy" solution you saw somewhere.. However.. RichTextBox simply does not have Document as DependencyProperty... So you have to do this in another way...
HTH
Convert a string date into datetime in Oracle
You can use a cast to char to see the date results
select to_char(to_date('17-MAR-17 06.04.54','dd-MON-yy hh24:mi:ss'), 'mm/dd/yyyy hh24:mi:ss') from dual;Java AES and using my own Key
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.*;
import java.io.BufferedReader;
import java.io.FileReader;
public class AESFile
{
private static String algorithm = "AES";
private static byte[] keyValue=new byte[] {'0','2','3','4','5','6','7','8','9','1','2','3','4','5','6','7'};// your key
// Performs Encryption
public static String encrypt(String plainText) throws Exception
{
Key key = generateKey();
Cipher chiper = Cipher.getInstance(algorithm);
chiper.init(Cipher.ENCRYPT_MODE, key);
byte[] encVal = chiper.doFinal(plainText.getBytes());
String encryptedValue = new BASE64Encoder().encode(encVal);
return encryptedValue;
}
// Performs decryption
public static String decrypt(String encryptedText) throws Exception
{
// generate key
Key key = generateKey();
Cipher chiper = Cipher.getInstance(algorithm);
chiper.init(Cipher.DECRYPT_MODE, key);
byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedText);
byte[] decValue = chiper.doFinal(decordedValue);
String decryptedValue = new String(decValue);
return decryptedValue;
}
//generateKey() is used to generate a secret key for AES algorithm
private static Key generateKey() throws Exception
{
Key key = new SecretKeySpec(keyValue, algorithm);
return key;
}
// performs encryption & decryption
public static void main(String[] args) throws Exception
{
FileReader file = new FileReader("C://myprograms//plaintext.txt");
BufferedReader reader = new BufferedReader(file);
String text = "";
String line = reader.readLine();
while(line!= null)
{
text += line;
line = reader.readLine();
}
reader.close();
System.out.println(text);
String plainText = text;
String encryptedText = AESFile.encrypt(plainText);
String decryptedText = AESFile.decrypt(encryptedText);
System.out.println("Plain Text : " + plainText);
System.out.println("Encrypted Text : " + encryptedText);
System.out.println("Decrypted Text : " + decryptedText);
}
}
convert UIImage to NSData
If you have an image inside a UIImageView , e.g. "myImageView", you can do the following:
Convert your image using UIImageJPEGRepresentation() or UIImagePNGRepresentation() like this:
NSData *data = UIImagePNGRepresentation(myImageView.image);
//or
NSData *data = UIImageJPEGRepresentation(myImageView.image, 0.8);
//The float param (0.8 in this example) is the compression quality
//expressed as a value from 0.0 to 1.0, where 1.0 represents
//the least compression (or best quality).
You can also put this code inside a GCD block and execute in another thread, showing an UIActivityIndicatorView during the process ...
//*code to show a loading view here*
dispatch_queue_t myQueue = dispatch_queue_create("com.my.queue", DISPATCH_QUEUE_SERIAL);
dispatch_async(myQueue, ^{
NSData *data = UIImagePNGRepresentation(myImageView.image);
//some code....
dispatch_async( dispatch_get_main_queue(), ^{
//*code to hide the loading view here*
});
});
How to disable/enable select field using jQuery?
Use the following:
$("select").attr("disabled", "disabled");
Or simply add id="pizza_kind" to <select> tag, like <select name="pizza_kind" id="pizza_kind">: jsfiddle link
The reason your code didn't work is simply because $("#pizza_kind") isn't selecting the <select> element because it does not have id="pizza_kind".
Edit: actually, a better selector is $("select[name='pizza_kind']"): jsfiddle link
How to change Android usb connect mode to charge only?
In your phone go to Settings->Connect to PC.
There you will see the option Default Connection Type. Select it and set it to your preference.
Firebase FCM force onTokenRefresh() to be called
[Service]
[IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })]
class MyFirebaseIIDService: FirebaseInstanceIdService
{
const string TAG = "MyFirebaseIIDService";
NotificationHub hub;
public override void OnTokenRefresh()
{
var refreshedToken = FirebaseInstanceId.Instance.Token;
Log.Debug(TAG, "FCM token: " + refreshedToken);
SendRegistrationToServer(refreshedToken);
}
void SendRegistrationToServer(string token)
{
// Register with Notification Hubs
hub = new NotificationHub(Constants.NotificationHubName,
Constants.ListenConnectionString, this);
Employee employee = JsonConvert.DeserializeObject<Employee>(Settings.CurrentUser);
//if user is not logged in
if (employee != null)
{
var tags = new List<string>() { employee.Email};
var regID = hub.Register(token, tags.ToArray()).RegistrationId;
Log.Debug(TAG, $"Successful registration of ID {regID}");
}
else
{
FirebaseInstanceId.GetInstance(Firebase.FirebaseApp.Instance).DeleteInstanceId();
hub.Unregister();
}
}
}
How to convert file to base64 in JavaScript?
Try the solution using the FileReader class:
function getBase64(file) {
var reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function () {
console.log(reader.result);
};
reader.onerror = function (error) {
console.log('Error: ', error);
};
}
var file = document.querySelector('#files > input[type="file"]').files[0];
getBase64(file); // prints the base64 string
Notice that .files[0] is a File type, which is a sublcass of Blob. Thus it can be used with FileReader.
See the complete working example.
Excel formula to get cell color
No, you can only get to the interior color of a cell by using a Macro. I am afraid. It's really easy to do (cell.interior.color) so unless you have a requirement that restricts you from using VBA, I say go for it.
How do I specify the platform for MSBuild?
In MSBuild or Teamcity use command line
MSBuild yourproject.sln /property:Configuration=Release /property:Platform=x64
or use shorter form:
MSBuild yourproject.sln /p:Configuration=Release /p:Platform=x64
However you need to set up platform in your project anyway, see the answer by Julien Hoarau.
What are the possible values of the Hibernate hbm2ddl.auto configuration and what do they do
I would use liquibase for updating your db. hibernate's schema update feature is really only o.k. for a developer while they are developing new features. In a production situation, the db upgrade needs to be handled more carefully.
Which characters are valid/invalid in a JSON key name?
No. Any valid string is a valid key. It can even have " as long as you escape it:
{"The \"meaning\" of life":42}
There is perhaps a chance you'll encounter difficulties loading such values into some languages, which try to associate keys with object field names. I don't know of any such cases, however.
How to Create simple drag and Drop in angularjs
Angular doesn't provide snazzy UI elements like drag and drop. That's not really Angular's purpose. However, there are a few well known directives that provide drag and drop. Here are two that I've used.
Difference between the Apache HTTP Server and Apache Tomcat?
Apache Tomcat is used to deploy your Java Servlets and JSPs. So in your Java project you can build your WAR (short for Web ARchive) file, and just drop it in the deploy directory in Tomcat.
So basically Apache is an HTTP Server, serving HTTP. Tomcat is a Servlet and JSP Server serving Java technologies.
Tomcat includes Catalina, which is a servlet container. A servlet, at the end, is a Java class. JSP files (which are similar to PHP, and older ASP files) are generated into Java code (HttpServlet), which is then compiled to .class files by the server and executed by the Java virtual machine.
html form - make inputs appear on the same line
This test shows three blocks of two blocks together on the same line.
.group {
display:block;
box-sizing:border-box;
}
.group>div {
display:inline-block;
padding-bottom:4px;
}
.group>div>span,.group>div>div {
width:200px;
height:40px;
text-align: center;
padding-top:20px;
padding-bottom:0px;
display:inline-block;
border:1px solid black;
background-color:blue;
color:white;
}
input[type=text] {
height:1em;
}<div class="group">
<div>
<span>First Name</span>
<span><input type="text"/></span>
</div>
<div>
<div>Last Name</div>
<div><input type="text"/></div>
</div>
<div>
<div>Address</div>
<div><input type="text"/></div>
</div>
</div>onclick open window and specific size
<a href="/index2.php?option=com_jumi&fileid=3&Itemid=11"
onclick="window.open(this.href,'targetWindow',
`toolbar=no,
location=no,
status=no,
menubar=no,
scrollbars=yes,
resizable=yes,
width=SomeSize,
height=SomeSize`);
return false;">Popup link</a>
Where width and height are pixels without units (width=400 not width=400px).
In most browsers it will not work if it is not written without line breaks, once the variables are setup have everything in one line:
<a href="/index2.php?option=com_jumi&fileid=3&Itemid=11" onclick="window.open(this.href,'targetWindow','toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=SomeSize,height=SomeSize'); return false;">Popup link</a>
Get Application Directory
I got this
String appPath = App.getApp().getApplicationContext().getFilesDir().getAbsolutePath();
Initialising mock objects - MockIto
There is a neat way of doing this.
If it's an Unit Test you can do this:
@RunWith(MockitoJUnitRunner.class) public class MyUnitTest { @Mock private MyFirstMock myFirstMock; @Mock private MySecondMock mySecondMock; @Spy private MySpiedClass mySpiedClass = new MySpiedClass(); // It's gonna inject the 2 mocks and the spied object per reflection to this object // The java doc of @InjectMocks explains it really well how and when it does the injection @InjectMocks private MyClassToTest myClassToTest; @Test public void testSomething() { } }EDIT: If it's an Integration test you can do this(not intended to be used that way with Spring. Just showcase that you can initialize mocks with diferent Runners):
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("aplicationContext.xml") public class MyIntegrationTest { @Mock private MyFirstMock myFirstMock; @Mock private MySecondMock mySecondMock; @Spy private MySpiedClass mySpiedClass = new MySpiedClass(); // It's gonna inject the 2 mocks and the spied object per reflection to this object // The java doc of @InjectMocks explains it really well how and when it does the injection @InjectMocks private MyClassToTest myClassToTest; @Before public void setUp() throws Exception { MockitoAnnotations.initMocks(this); } @Test public void testSomething() { } }
Difference between Hive internal tables and external tables?
When there is data already in HDFS, an external Hive table can be created to describe the data. It is called EXTERNAL because the data in the external table is specified in the LOCATION properties instead of the default warehouse directory.
When keeping data in the internal tables, Hive fully manages the life cycle of the table and data. This means the data is removed once the internal table is dropped. If the external table is dropped, the table metadata is deleted but the data is kept. Most of the time, an external table is preferred to avoid deleting data along with tables by mistake.
MySQL, create a simple function
Try to change CREATE FUNCTION F_TEST(PID INT) RETURNS VARCHAR this portion to
CREATE FUNCTION F_TEST(PID INT) RETURNS TEXT
and change the following line too.
DECLARE NAME_FOUND TEXT DEFAULT "";
It should work.
How do I get the coordinate position after using jQuery drag and drop?
I would start with something like this. Then update that to use the position plugin and that should get you where you want to be.
Command line for looking at specific port
For port 80, the command would be : netstat -an | find "80" For port n, the command would be : netstat -an | find "n"
Here, netstat is the instruction to your machine
-a : Displays all connections and listening ports -n : Displays all address and instructions in numerical format (This is required because output from -a can contain machine names)
Then, a find command to "Pattern Match" the output of previous command.
How to create an array of object literals in a loop?
You can do something like that in ES6.
new Array(10).fill().map((e,i) => {
return {idx: i}
});
<div style display="none" > inside a table not working
simply change <div> to <tbody>
<table id="authenticationSetting" style="display: none">
<tbody id="authenticationOuterIdentityBlock" style="display: none;">
<tr>
<td class="orionSummaryHeader">
<orion:message key="policy.wifi.enterprise.authentication.outeridentitity" />:</td>
<td class="orionSummaryColumn">
<orion:textbox id="authenticationOuterIdentity" size="30" />
</td>
</tr>
</tbody>
</table>
Get the current date and time
use DateTime.Now
try this:
DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss")
Avoiding NullPointerException in Java
- If you consider an object should not be null (or it is a bug) use an assert.
- If your method doesn't accept null params say it in the javadoc and use an assert.
You have to check for object != null only if you want to handle the case where the object may be null...
There is a proposal to add new annotations in Java7 to help with null / notnull params: http://tech.puredanger.com/java7/#jsr308
How do I abort/cancel TPL Tasks?
Task are being executed on the ThreadPool (at least, if you are using the default factory), so aborting the thread cannot affect the tasks. For aborting tasks, see Task Cancellation on msdn.
Possible reasons for timeout when trying to access EC2 instance
Just reboot the Ec2 Instance once you applied Rules
Why doesn't Python have multiline comments?
Multiline comments using IDLE on:
Mac OS X, after code selection, comment a block of code with Ctrl+3 and uncomment using Ctrl+4.
Windows, after code selection, comment a block of code with Ctrl+Alt+3 and uncomment using Ctrl+At+4.
ASP.NET MVC DropDownListFor with model of type List<string>
I realize this question was asked a long time ago, but I came here looking for answers and wasn't satisfied with anything I could find. I finally found the answer here:
https://www.tutorialsteacher.com/mvc/htmlhelper-dropdownlist-dropdownlistfor
To get the results from the form, use the FormCollection and then pull each individual value out by it's model name thus:
yourRecord.FieldName = Request.Form["FieldNameInModel"];
As far as I could tell it makes absolutely no difference what argument name you give to the FormCollection - use Request.Form["NameFromModel"] to retrieve it.
No, I did not dig down to see how th4e magic works under the covers. I just know it works...
I hope this helps somebody avoid the hours I spent trying different approaches before I got it working.
Core dump file analysis
You just need a binary (with debugging symbols included) that is identical to the one that generated the core dump file. Then you can run gdb path/to/the/binary path/to/the/core/dump/file to debug it.
When it starts up, you can use bt (for backtrace) to get a stack trace from the time of the crash. In the backtrace, each function invocation is given a number. You can use frame number (replacing number with the corresponding number in the stack trace) to select a particular stack frame.
You can then use list to see code around that function, and info locals to see the local variables. You can also use print name_of_variable (replacing "name_of_variable" with a variable name) to see its value.
Typing help within GDB will give you a prompt that will let you see additional commands.
VBScript How can I Format Date?
The output of FormatDateTime depends on configuration in Regional Settings in Control Panel. So in other countries FormatDateTime(d, 2) may for example return yyyy-MM-dd.
If you want your output to be "culture invariant", use myDateFormat() from stian.net's solution. If you just don't like slashes in dates and you don't care about date format in other countries, you can just use
Replace(FormatDateTime(d,2),"/","-")
Removing Duplicate Values from ArrayList
You can make use of Google Guava utilities, as shown below
list = ImmutableSet.copyOf(list).asList();
This is probably the most efficient way of eliminating the duplicates from the list and interestingly, it preserves the iteration order as well.
UPDATE
But, in case, you don't want to involve Guava then duplicates can be removed as shown below.
ArrayList<String> list = new ArrayList<String>();
list.add("Krishna");
list.add("Krishna");
list.add("Kishan");
list.add("Krishn");
list.add("Aryan");
list.add("Harm");
System.out.println("List"+list);
HashSet hs = new HashSet();
hs.addAll(list);
list.clear();
list.addAll(hs);
But, of course, this will destroys the iteration order of the elements in the ArrayList.
Shishir
Node.js, can't open files. Error: ENOENT, stat './path/to/file'
Here the code to use your app.js
input specifies file name
res.download(__dirname+'/'+input);
Passing command line arguments to R CMD BATCH
In your R script, called test.R:
args <- commandArgs(trailingOnly = F)
myargument <- args[length(args)]
myargument <- sub("-","",myargument)
print(myargument)
q(save="no")
From the command line run:
R CMD BATCH -4 test.R
Your output file, test.Rout, will show that the argument 4 has been successfully passed to R:
cat test.Rout
> args <- commandArgs(trailingOnly = F)
> myargument <- args[length(args)]
> myargument <- sub("-","",myargument)
> print(myargument)
[1] "4"
> q(save="no")
> proc.time()
user system elapsed
0.222 0.022 0.236
Converting an integer to binary in C
The working solution for Integer number to binary conversion is below.
int main()
{
int num=241; //Assuming 16 bit integer
for(int i=15; i>=0; i--) cout<<((num >> i) & 1);
cout<<endl;
for(int i=0; i<16; i++) cout<<((num >> i) & 1);
cout<<endl;
return 0;
}
You can capture the cout<< part based on your own requirement.
Backporting Python 3 open(encoding="utf-8") to Python 2
Here's one way:
with open("filename.txt", "rb") as f:
contents = f.read().decode("UTF-8")
Deep copy vs Shallow Copy
Shallow copy:
Some members of the copy may reference the same objects as the original:
class X
{
private:
int i;
int *pi;
public:
X()
: pi(new int)
{ }
X(const X& copy) // <-- copy ctor
: i(copy.i), pi(copy.pi)
{ }
};
Here, the pi member of the original and copied X object will both point to the same int.
Deep copy:
All members of the original are cloned (recursively, if necessary). There are no shared objects:
class X
{
private:
int i;
int *pi;
public:
X()
: pi(new int)
{ }
X(const X& copy) // <-- copy ctor
: i(copy.i), pi(new int(*copy.pi)) // <-- note this line in particular!
{ }
};
Here, the pi member of the original and copied X object will point to different int objects, but both of these have the same value.
The default copy constructor (which is automatically provided if you don't provide one yourself) creates only shallow copies.
Correction: Several comments below have correctly pointed out that it is wrong to say that the default copy constructor always performs a shallow copy (or a deep copy, for that matter). Whether a type's copy constructor creates a shallow copy, or deep copy, or something in-between the two, depends on the combination of each member's copy behaviour; a member's type's copy constructor can be made to do whatever it wants, after all.
Here's what section 12.8, paragraph 8 of the 1998 C++ standard says about the above code examples:
The implicitly defined copy constructor for class
Xperforms a memberwise copy of its subobjects. [...] Each subobject is copied in the manner appropriate to its type: [...] [I]f the subobject is of scalar type, the builtin assignment operator is used.
What does EntityManager.flush do and why do I need to use it?
A call to EntityManager.flush(); will force the data to be persist in the database immediately as EntityManager.persist() will not (depending on how the EntityManager is configured : FlushModeType (AUTO or COMMIT) by default it's set to AUTO and a flush will be done automatically by if it's set to COMMIT the persitence of the data to the underlying database will be delayed when the transaction is commited).
How to get the PYTHONPATH in shell?
The environment variable PYTHONPATH is actually only added to the list of locations Python searches for modules. You can print out the full list in the terminal like this:
python -c "import sys; print(sys.path)"
Or if want the output in the UNIX directory list style (separated by :) you can do this:
python -c "import sys; print(':'.join(x for x in sys.path if x))"
Which will output something like this:
/usr/local/lib/python2.7/dist-packages/feedparser-5.1.3-py2.7.egg:/usr/local/lib/ python2.7/dist-packages/stripogram-1.5-py2.7.egg:/home/qiime/lib:/home/debian:/us r/lib/python2.7:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib /python2.7/lib-old:/usr/lib/python2.7/lib- dynload:/usr/local/lib/python2.7/dist- packages:/usr/lib/python2.7/dist-packages:/usr/lib/python2.7/dist-packages/PIL:/u sr/lib/python2.7/dist-packages/gst-0.10:/usr/lib/python2.7/dist-packages/gtk-2.0: /usr/lib/pymodules/python2.7
Using sudo with Python script
sometimes require a carriage return:
os.popen("sudo -S %s"%(command), 'w').write('mypass\n')
denied: requested access to the resource is denied : docker
If it still fails after docker login, make sure the repository you're trying to push to was created in the first place.
What is the SSIS package and what does it do?
SSIS (SQL Server Integration Services) is an upgrade of DTS (Data Transformation Services), which is a feature of the previous version of SQL Server. SSIS packages can be created in BIDS (Business Intelligence Development Studio). These can be used to merge data from heterogeneous data sources into SQL Server. They can also be used to populate data warehouses, to clean and standardize data, and to automate administrative tasks.
SQL Server Integration Services (SSIS) is a component of Microsoft SQL Server 2005. It replaces Data Transformation Services, which has been a feature of SQL Server since Version 7.0. Unlike DTS, which was included in all versions, SSIS is only available in the "Standard" and "Enterprise" editions. Integration Services provides a platform to build data integration and workflow applications. The primary use for SSIS is data warehousing as the product features a fast and flexible tool for data extraction, transformation, and loading (ETL).). The tool may also be used to automate maintenance of SQL Server databases, update multidimensional cube data, and perform other functions.
How can I get the ID of an element using jQuery?
Well, seems there has not been a solution and would like to propose my own solution that is an expansion of the JQuery prototype's. I put this in a Helper file that is loaded after the JQuery library, hence the check for window.jQuery
if (window.jQuery) {
$.prototype.id = function () {
if (this.length > 1) {
var val = [];
this.each(function (idx, el) {
val.push($(el).id());
});
return val;
} else {
return this.attr('id');
}
}
}
It may not be perfect but it is a start to maybe getting inclusion into the JQuery library.
Returns either a single string value or an Array of string values. The Array of string values, is for the event an multi-element selector was used.
How to evaluate a math expression given in string form?
For my university project, I was looking for a parser / evaluator supporting both basic formulas and more complicated equations (especially iterated operators). I found very nice open source library for JAVA and .NET called mXparser. I will give a few examples to make some feeling on the syntax, for further instructions please visit project website (especially tutorial section).
https://mathparser.org/mxparser-tutorial/
And few examples
1 - Simple furmula
Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()
2 - User defined arguments and constants
Argument x = new Argument("x = 10");
Constant a = new Constant("a = pi^2");
Expression e = new Expression("cos(a*x)", x, a);
double v = e.calculate()
3 - User defined functions
Function f = new Function("f(x, y, z) = sin(x) + cos(y*z)");
Expression e = new Expression("f(3,2,5)", f);
double v = e.calculate()
4 - Iteration
Expression e = new Expression("sum( i, 1, 100, sin(i) )");
double v = e.calculate()
Found recently - in case you would like to try the syntax (and see the advanced use case) you can download the Scalar Calculator app that is powered by mXparser.
Best regards
Remove or adapt border of frame of legend using matplotlib
One more related question, since it took me forever to find the answer:
How to make the legend background blank (i.e. transparent, not white):
legend = plt.legend()
legend.get_frame().set_facecolor('none')
Warning, you want 'none' (the string). None means the default color instead.
What's the fastest algorithm for sorting a linked list?
It is reasonable to expect that you cannot do any better than O(N log N) in running time.
However, the interesting part is to investigate whether you can sort it in-place, stably, its worst-case behavior and so on.
Simon Tatham, of Putty fame, explains how to sort a linked list with merge sort. He concludes with the following comments:
Like any self-respecting sort algorithm, this has running time O(N log N). Because this is Mergesort, the worst-case running time is still O(N log N); there are no pathological cases.
Auxiliary storage requirement is small and constant (i.e. a few variables within the sorting routine). Thanks to the inherently different behaviour of linked lists from arrays, this Mergesort implementation avoids the O(N) auxiliary storage cost normally associated with the algorithm.
There is also an example implementation in C that work for both singly and doubly linked lists.
As @Jørgen Fogh mentions below, big-O notation may hide some constant factors that can cause one algorithm to perform better because of memory locality, because of a low number of items, etc.
How to execute a function when page has fully loaded?
2019 update: This is was the answer that worked for me. As I needed multiple ajax requests to fire and return data first to count the list items.
$(document).ajaxComplete(function(){
alert("Everything is ready now!");
});
What is the simplest jQuery way to have a 'position:fixed' (always at top) div?
HTML/CSS Approach
If you are looking for an option that does not require much JavaScript (and and all the problems that come with it, such as rapid scroll event calls), it is possible to gain the same behavior by adding a wrapper <div> and a couple of styles. I noticed much smoother scrolling (no elements lagging behind) when I used the following approach:
HTML
<div id="wrapper">
<div id="fixed">
[Fixed Content]
</div><!-- /fixed -->
<div id="scroller">
[Scrolling Content]
</div><!-- /scroller -->
</div><!-- /wrapper -->
CSS
#wrapper { position: relative; }
#fixed { position: fixed; top: 0; right: 0; }
#scroller { height: 100px; overflow: auto; }
JS
//Compensate for the scrollbar (otherwise #fixed will be positioned over it).
$(function() {
//Determine the difference in widths between
//the wrapper and the scroller. This value is
//the width of the scroll bar (if any).
var offset = $('#wrapper').width() - $('#scroller').get(0).clientWidth;
//Set the right offset
$('#fixed').css('right', offset + 'px');?
});
Of course, this approach could be modified for scrolling regions that gain/lose content during runtime (which would result in addition/removal of scrollbars).
Android API 21 Toolbar Padding
A combination of
android:padding="0dp"
In the xml for the Toolbar
and
mToolbar.setContentInsetsAbsolute(0, 0)
In the code
This worked for me.
throwing an exception in objective-c/cocoa
A word of caution here. In Objective-C, unlike many similar languages, you generally should try to avoid using exceptions for common error situations that may occur in normal operation.
Apple's documentation for Obj-C 2.0 states the following: "Important: Exceptions are resource-intensive in Objective-C. You should not use exceptions for general flow-control, or simply to signify errors (such as a file not being accessible)"
Apple's conceptual Exception handling documentation explains the same, but with more words: "Important: You should reserve the use of exceptions for programming or unexpected runtime errors such as out-of-bounds collection access, attempts to mutate immutable objects, sending an invalid message, and losing the connection to the window server. You usually take care of these sorts of errors with exceptions when an application is being created rather than at runtime. [.....] Instead of exceptions, error objects (NSError) and the Cocoa error-delivery mechanism are the recommended way to communicate expected errors in Cocoa applications."
The reasons for this is partly to adhere to programming idioms in Objective-C (using return values in simple cases and by-reference parameters (often the NSError class) in more complex cases), partly that throwing and catching exceptions is much more expensive and finally (and perpaps most importantly) that Objective-C exceptions are a thin wrapper around C's setjmp() and longjmp() functions, essentially messing up your careful memory handling, see this explanation.
Add views below toolbar in CoordinatorLayout
I managed to fix this by adding:
android:layout_marginTop="?android:attr/actionBarSize"
to the FrameLayout like so:
<FrameLayout
android:id="@+id/content"
android:layout_marginTop="?android:attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
Pass array to ajax request in $.ajax()
Just use the JSON.stringify method and pass it through as the "data" parameter for the $.ajax function, like follows:
$.ajax({
type: "POST",
url: "index.php",
dataType: "json",
data: JSON.stringify({ paramName: info }),
success: function(msg){
$('.answer').html(msg);
}
});
You just need to make sure you include the JSON2.js file in your page...
Why can't variables be declared in a switch statement?
Consider:
switch(val)
{
case VAL:
int newVal = 42;
default:
int newVal = 23;
}
In the absence of break statements, sometimes newVal gets declared twice, and you don't know whether it does until runtime. My guess is that the limitation is because of this kind of confusion. What would the scope of newVal be? Convention would dictate that it would be the whole of the switch block (between the braces).
I'm no C++ programmer, but in C:
switch(val) {
int x;
case VAL:
x=1;
}
Works fine. Declaring a variable inside a switch block is fine. Declaring after a case guard is not.
Java - How to create new Entry (key, value)
org.apache.commons.lang3.tuple.Pair implements java.util.Map.Entry and can also be used standalone.
Also as others mentioned Guava's com.google.common.collect.Maps.immutableEntry(K, V) does the trick.
I prefer Pair for its fluent Pair.of(L, R) syntax.
Visual Studio keyboard shortcut to automatically add the needed 'using' statement
I can highly recommend checking out the Visual Studio plugin ReSharper. It has a QuickFix feature that does the same (and a lot more).
But ReSharper doesn't require the cursor to be located on the actual code that requires a new namespace. Say, you copy/paste some code into the source file, and just a few clicks of Alt + Enter, and all the required usings are included.
Oh, and it also makes sure that the required assembly reference is added to your project. Say for example, you create a new project containing NUnit unit tests. The first class you write, you add the [TestFixture] attribute. If you already have one project in your solution that references the NUnit DLL file, then ReSharper is able to see that the TestFixtureAttribute comes from that DLL file, so it will automatically add that assembly reference to your new project.
And it also adds required namespaces for extension methods. At least the ReSharper version 5 beta does. I'm pretty sure that Visual Studio's built-in resolve function doesn't do that.
On the down side, it's a commercial product, so you have to pay for it. But if you work with software commercially, the gained productivity (the plug in does a lot of other cool stuff) outweighs the price tag.
Yes, I'm a fan ;)
What does Html.HiddenFor do?
Like a lot of functions, this one can be used in many different ways to solve many different problems, I think of it as yet another tool in our toolbelts.
So far, the discussion has focused heavily on simply hiding an ID, but that is only one value, why not use it for lots of values! That is what I am doing, I use it to load up the values in a class only one view at a time, because html.beginform creates a new object and if your model object for that view already had some values passed to it, those values will be lost unless you provide a reference to those values in the beginform.
To see a great motivation for the html.hiddenfor, I recommend you see Passing data from a View to a Controller in .NET MVC - "@model" not highlighting
How to get table cells evenly spaced?
In your CSS file:
.TableHeader { width: 100px; }
This will set all of the td tags below each header to 100px. You can also add a width definition (in the markup) to each individual th tag, but the above solution would be easier.
One-liner if statements, how to convert this if-else-statement
All you'd need in your case is:
return expression;
The reason why is that the expression itself evaluates to a boolean value of true or false, so it's redundant to have an if block (or even a ?: operator).
Ruby: Can I write multi-line string with no concatenation?
There are pieces to this answer that helped me get what I needed (easy multi-line concatenation WITHOUT extra whitespace), but since none of the actual answers had it, I'm compiling them here:
str = 'this is a multi-line string'\
' using implicit concatenation'\
' to prevent spare \n\'s'
=> "this is a multi-line string using implicit concatenation to eliminate spare
\\n's"
As a bonus, here's a version using funny HEREDOC syntax (via this link):
p <<END_SQL.gsub(/\s+/, " ").strip
SELECT * FROM users
ORDER BY users.id DESC
END_SQL
# >> "SELECT * FROM users ORDER BY users.id DESC"
The latter would mostly be for situations that required more flexibility in the processing. I personally don't like it, it puts the processing in a weird place w.r.t. the string (i.e., in front of it, but using instance methods that usually come afterward), but it's there. Note that if you are indenting the last END_SQL identifier (which is common, since this is probably inside a function or module), you will need to use the hyphenated syntax (that is, p <<-END_SQL instead of p <<END_SQL). Otherwise, the indenting whitespace causes the identifier to be interpreted as a continuation of the string.
This doesn't save much typing, but it looks nicer than using + signs, to me.
Also (I say in an edit, several years later), if you're using Ruby 2.3+, the operator <<~ is also available, which removes extra indentation from the final string. You should be able to remove the .gsub invocation, in that case (although it might depend on both the starting indentation and your final needs).
EDIT: Adding one more:
p %{
SELECT * FROM users
ORDER BY users.id DESC
}.gsub(/\s+/, " ").strip
# >> "SELECT * FROM users ORDER BY users.id DESC"
How to update Ruby with Homebrew?
Adding to the selected answer (as I haven't enough rep to add comment), one way to see the list of available versions (from ref) try:
$ rbenv install -l
Algorithm to generate all possible permutations of a list?
If anyone wonders how to be done in permutation in javascript.
Idea/pseudocode
- pick one element at a time
- permute rest of the element and then add the picked element to the all of the permutation
for example. 'a'+ permute(bc). permute of bc would be bc & cb. Now add these two will give abc, acb. similarly, pick b + permute (ac) will provice bac, bca...and keep going.
now look at the code
function permutations(arr){
var len = arr.length,
perms = [],
rest,
picked,
restPerms,
next;
//for one or less item there is only one permutation
if (len <= 1)
return [arr];
for (var i=0; i<len; i++)
{
//copy original array to avoid changing it while picking elements
rest = Object.create(arr);
//splice removed element change array original array(copied array)
//[1,2,3,4].splice(2,1) will return [3] and remaining array = [1,2,4]
picked = rest.splice(i, 1);
//get the permutation of the rest of the elements
restPerms = permutations(rest);
// Now concat like a+permute(bc) for each
for (var j=0; j<restPerms.length; j++)
{
next = picked.concat(restPerms[j]);
perms.push(next);
}
}
return perms;
}
Take your time to understand this. I got this code from (pertumation in JavaScript)
SQL Server Management Studio alternatives to browse/edit tables and run queries
TOAD for MS SQL looks pretty good. I've never used it personally but I have used Quest's other products and they're solid.
How to detect orientation change in layout in Android?
For loading the layout in layout-land folder means you have two separate layouts then you have to make setContentView in onConfigurationChanged method.
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Checks the orientation of the screen
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
setContentView(R.layout.yourxmlinlayout-land);
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
setContentView(R.layout.yourxmlinlayoutfolder);
}
}
If you have only one layout then no necessary to make setContentView in This method. simply
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
Hiding table data using <div style="display:none">
Give all the rows you want to hide a class name that you can use for hiding. Use javascript to add/remove this class from the different rows.
<table>
<tr><th>Test Table</th><tr>
<tr class="toHide"><td>123456789</td><tr>
<tr class="toHide"><td>123456789</td><tr>
<tr class="toHide"><td>123456789</td><tr>
</table>
CSS:
.toHide
{
display: none;
}
What are DDL and DML?
DDL is Data Definition Language : Specification notation for defining the database schema. It works on Schema level.
DDL commands are:
create,drop,alter,rename
For example:
create table account (
account_number char(10),
balance integer);
DML is Data Manipulation Language .It is used for accessing and manipulating the data.
DML commands are:
select,insert,delete,update,call
For example :
update account set balance = 1000 where account_number = 01;
How to send email from localhost WAMP Server to send email Gmail Hotmail or so forth?
For me Fake Sendmail works.
What to do:
1) Edit C:\wamp\sendmail\sendmail.ini:
smtp_server=smtp.gmail.com
smtp_port=465
[email protected]
auth_password=your_password
2) Edit php.ini and set sendmail_path
sendmail_path = "C:\wamp\sendmail\sendmail.exe -t"
That's it. Now you can test a mail.
Leverage browser caching, how on apache or .htaccess?
I was doing the same thing a couple days ago. Added this to my .htaccess file:
ExpiresActive On
ExpiresByType image/gif A2592000
ExpiresByType image/jpeg A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/png A2592000
ExpiresByType image/x-icon A2592000
ExpiresByType text/css A86400
ExpiresByType text/javascript A86400
ExpiresByType application/x-shockwave-flash A2592000
#
<FilesMatch "\.(gif¦jpe?g¦png¦ico¦css¦js¦swf)$">
Header set Cache-Control "public"
</FilesMatch>
And now when I run google speed page, leverage browwer caching is no longer a high priority.
Hope this helps.
Installing a dependency with Bower from URL and specify version
Just an update.
Now if it's a github repository then using just a github shorthand is enough if you do not mind the version of course.
GitHub shorthand
$ bower install desandro/masonry
How to write multiple conditions in Makefile.am with "else if"
As you've discovered, you can't do that. You can do:
libtest_LIBS =
...
if HAVE_CLIENT
libtest_LIBS += libclient.la
endif
if HAVE_SERVER
libtest_LIBS += libserver.la
endif
How can I quickly sum all numbers in a file?
You can do it with Alacon - command-line utility for Alasql database.
It works with Node.js, so you need to install Node.js and then Alasql package:
To calculate sum from TXT file you can use the following command:
> node alacon "SELECT VALUE SUM([0]) FROM TXT('mydata.txt')"
How should I validate an e-mail address?
According to Patterns.EMAIL_ADDRESS, this email is correct "[email protected]". So I modified the regex in Patterns.EMAIL_ADDRESS and increased the minimum length for domain. Here is the function for Kotlin:
fun isEmailValid(email: String): Boolean =
email.isNotEmpty() && Pattern.compile(
"[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
"\\@" +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
"(" +
"\\." +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{1,25}" +
")+"
).matcher(email).matches()
I just changed domain part from {0,25} to {1,25}.
MySQL: is a SELECT statement case sensitive?
USE BINARY
This is a simple select
SELECT * FROM myTable WHERE 'something' = 'Something'
= 1
This is a select with binary
SELECT * FROM myTable WHERE BINARY 'something' = 'Something'
or
SELECT * FROM myTable WHERE 'something' = BINARY 'Something'
= 0
Text size and different android screen sizes
I think you can archive that by add multiple layout resource for each screen size, example:
res/layout/my_layout.xml // layout for normal screen size ("default")
res/layout-small/my_layout.xml // layout for small screen size with small text
res/layout-large/my_layout.xml // layout for large screen size with larger text
res/layout-xlarge/my_layout.xml // layout for extra large screen size with even larger text
res/layout-xlarge-land/my_layout.xml // layout for extra large in landscape orientation
Reference: 1.http://developer.android.com/guide/practices/screens_support.html
Change the Value of h1 Element within a Form with JavaScript
You can do it with regular JavaScript this way:
document.getElementById('h1_id').innerHTML = 'h1 content here';
Here is the doc for getElementById and the innerHTML property.
The innerHTML property description:
A DOMString containing the HTML serialization of the element's descendants. Setting the value of innerHTML removes all of the element's descendants and replaces them with nodes constructed by parsing the HTML given in the string htmlString.
How do I escape double and single quotes in sed?
My problem was that I needed to have the "" outside the expression since I have a dynamic variable inside the sed expression itself. So than the actual solution is that one from lenn jackman that you replace the " inside the sed regex with [\"].
So my complete bash is:
RELEASE_VERSION="0.6.6"
sed -i -e "s#value=[\"]trunk[\"]#value=\"tags/$RELEASE_VERSION\"#g" myfile.xml
Here is:
# is the sed separator
[\"] = " in regex
value = \"tags/$RELEASE_VERSION\" = my replacement string, important it has just the \" for the quotes
Get the week start date and week end date from week number
Here is a DATEFIRST agnostic solution:
SET DATEFIRST 4 /* or use any other weird value to test it */
DECLARE @d DATETIME
SET @d = GETDATE()
SELECT
@d ThatDate,
DATEADD(dd, 0 - (@@DATEFIRST + 5 + DATEPART(dw, @d)) % 7, @d) Monday,
DATEADD(dd, 6 - (@@DATEFIRST + 5 + DATEPART(dw, @d)) % 7, @d) Sunday
ASP.NET Setting width of DataBound column in GridView
This is going to work for all situations while working with width.
`<asp:TemplateField HeaderText="DATE">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("date") %>' Width="100px"></asp:Label>
</ItemTemplate>
</asp:TemplateField>`
Call PHP function from jQuery?
AJAX does the magic:
$(document).ready(function(
$.ajax({ url: 'script.php?argument=value&foo=bar' });
));
What tool to use to draw file tree diagram
Why could you not just make a file structure on the Windows file system and populate it with your desired names, then use a screen grabber like HyperSnap (or the ubiquitous Alt-PrtScr) to capture a section of the Explorer window.
I did this when 'demoing' an internet application which would have collapsible sections, I just had to create files that looked like my desired entries.
HyperSnap gives JPGs at least (probably others but I've never bothered to investigate).
Or you could screen capture the icons +/- from Explorer and use them within MS Word Draw itself to do your picture, but I've never been able to get MS Word Draw to behave itself properly.
How to reset selected file with input tag file type in Angular 2?
If you are facing issue with ng2-file-upload,
HTML:
<input type="file" name="myfile" ` **#activeFrameinputFile** `ng2FileSelect [uploader]="frameUploader" (change)="frameUploader.uploadAll()" />
component
import { Component, OnInit, ElementRef, ViewChild } from '@angular/core';
@ViewChild('`**activeFrameinputFile**`') `**InputFrameVariable**`: ElementRef;
this.frameUploader.onSuccessItem = (item, response, status, headers) => {
this.`**InputFrameVariable**`.nativeElement.value = '';
};
Git: Cannot see new remote branch
It sounds trivial, but my issue was that I wasn't in the right project. Make sure you are in the project you expect to be in; otherwise, you won't be able to pull down the correct branches.
How to save a spark DataFrame as csv on disk?
I had similar problem. I needed to write down csv file on driver while I was connect to cluster in client mode.
I wanted to reuse the same CSV parsing code as Apache Spark to avoid potential errors.
I checked spark-csv code and found code responsible for converting dataframe into raw csv RDD[String] in com.databricks.spark.csv.CsvSchemaRDD.
Sadly it is hardcoded with sc.textFile and the end of relevant method.
I copy-pasted that code and removed last lines with sc.textFile and returned RDD directly instead.
My code:
/*
This is copypasta from com.databricks.spark.csv.CsvSchemaRDD
Spark's code has perfect method converting Dataframe -> raw csv RDD[String]
But in last lines of that method it's hardcoded against writing as text file -
for our case we need RDD.
*/
object DataframeToRawCsvRDD {
val defaultCsvFormat = com.databricks.spark.csv.defaultCsvFormat
def apply(dataFrame: DataFrame, parameters: Map[String, String] = Map())
(implicit ctx: ExecutionContext): RDD[String] = {
val delimiter = parameters.getOrElse("delimiter", ",")
val delimiterChar = if (delimiter.length == 1) {
delimiter.charAt(0)
} else {
throw new Exception("Delimiter cannot be more than one character.")
}
val escape = parameters.getOrElse("escape", null)
val escapeChar: Character = if (escape == null) {
null
} else if (escape.length == 1) {
escape.charAt(0)
} else {
throw new Exception("Escape character cannot be more than one character.")
}
val quote = parameters.getOrElse("quote", "\"")
val quoteChar: Character = if (quote == null) {
null
} else if (quote.length == 1) {
quote.charAt(0)
} else {
throw new Exception("Quotation cannot be more than one character.")
}
val quoteModeString = parameters.getOrElse("quoteMode", "MINIMAL")
val quoteMode: QuoteMode = if (quoteModeString == null) {
null
} else {
QuoteMode.valueOf(quoteModeString.toUpperCase)
}
val nullValue = parameters.getOrElse("nullValue", "null")
val csvFormat = defaultCsvFormat
.withDelimiter(delimiterChar)
.withQuote(quoteChar)
.withEscape(escapeChar)
.withQuoteMode(quoteMode)
.withSkipHeaderRecord(false)
.withNullString(nullValue)
val generateHeader = parameters.getOrElse("header", "false").toBoolean
val headerRdd = if (generateHeader) {
ctx.sparkContext.parallelize(Seq(
csvFormat.format(dataFrame.columns.map(_.asInstanceOf[AnyRef]): _*)
))
} else {
ctx.sparkContext.emptyRDD[String]
}
val rowsRdd = dataFrame.rdd.map(row => {
csvFormat.format(row.toSeq.map(_.asInstanceOf[AnyRef]): _*)
})
headerRdd union rowsRdd
}
}
How can I represent 'Authorization: Bearer <token>' in a Swagger Spec (swagger.json)
My Hackie way to solve this was by modifying the swagger.go file in the echo-swagger package in my case:
At the bottom of the file update the window.onload function to include a requestInterceptor which correctly formats the token.
window.onload = function() {
// Build a system
const ui = SwaggerUIBundle({
url: "{{.URL}}",
dom_id: '#swagger-ui',
validatorUrl: null,
presets: [
SwaggerUIBundle.presets.apis,
SwaggerUIStandalonePreset
],
plugins: [
SwaggerUIBundle.plugins.DownloadUrl
,
layout: "StandaloneLayout",
requestInterceptor: (req) => {
req.headers.Authorization = "Bearer " + req.headers.Authorization
return req
}
})
window.ui = ui
}
RHEL 6 - how to install 'GLIBC_2.14' or 'GLIBC_2.15'?
This often occurs when you build software in RHEL 7 and try to run on RHEL 6.
To update GLIBC to any version, simply download the package from
For example glibc-2.14.tar.gz in your case.
1. tar xvfz glibc-2.14.tar.gz
2. cd glibc-2.14
3. mkdir build
4. cd build
5. ../configure --prefix=/opt/glibc-2.14
6. make
7. sudo make install
8. export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH
Then try to run your software, glibc-2.14 should be linked.
mysqli_connect(): (HY000/2002): No connection could be made because the target machine actively refused it
If you look at your XAMPP Control Panel, it's clearly stated that the port to the MySQL server is 3306 - you provided 3360. The 3306 is default, and thus doesn't need to be specified. Even so, the 5th parameter of mysqli_connect() is the port, which is where it should be specified.
You could just remove the port specification altogether, as you're using the default port, making it
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$db = 'test_db13';
References
Can I get a patch-compatible output from git-diff?
The git diffs have an extra path segment prepended to the file paths. You can strip the this entry in the path by specifying -p1 with patch, like so:
patch -p1 < save.patch