Programs & Examples On #Search box

A search box or search field is a common GUI element used in computer programs

Add Twitter Bootstrap icon to Input box

For bootstrap 4

        <link rel="stylesheet" href="" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">

            <script src="" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
            <script src="" integrity="sha384-cs/chFZiN24E4KMATLdqdvsezGxaGsi4hLGOzlXwp5UZB1LY//20VyM2taTB4QvJ" crossorigin="anonymous"></script>
            <script src="" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>
        <link href="" rel="stylesheet">
        <form class="form-inline my-2 my-lg-0">
                        <div class="input-group">
                            <input class="form-control" type="search" placeholder="Search">
                            <div class="input-group-append">
                                <div class="input-group-text"><i class="fa fa-search"></i></div>


Get root view from current activity

I tested this in android 4.0.3, only:


give the same view what we get from




giving child of its


Please confirm.

How do I scroll a row of a table into view (element.scrollintoView) using jQuery?

I couldn't add a comment to Abhijit Rao's answer above, so I am submitting this as an additional answer.

I needed to have the table column scroll into view on a wide table, so I added the scroll left features into the function. As someone mentioned, it jumps when it scrolls, but it worked for my purposes.

function scrollIntoView(element, container) {
  var containerTop = $(container).scrollTop();
  var containerLeft = $(container).scrollLeft();
  var containerBottom = containerTop + $(container).height();
  var containerRight = containerLeft + $(container).width();

  var elemTop = element.offsetTop;
  var elemLeft = element.offsetLeft;
  var elemBottom = elemTop + $(element).height();
  var elemRight = elemLeft + $(element).width();

  if (elemTop < containerTop) {
  } else if (elemBottom > containerBottom) {
    $(container).scrollTop(elemBottom - $(container).height());

  if(elemLeft < containerLeft) {
  } else if(elemRight > containerRight) {
    $(container).scrollLeft(elemRight - $(container).width());

Why do I get permission denied when I try use "make" to install something?

The problem is frequently with 'secure' setup of mountpoints, such as /tmp

If they are mounted noexec (check with cat /etc/mtab and or sudo mount) then there is no permission to execute any binaries or build scripts from within the (temporary) folder.

E.g. to remount temporarily:

 sudo mount -o remount,exec /tmp

Or to change permanently, remove noexec in /etc/fstab

How can I create a carriage return in my C# string

Along with Environment.NewLine and the literal \r\n or just \n you may also use a verbatim string in C#. These begin with @ and can have embedded newlines. The only thing to keep in mind is that " needs to be escaped as "". An example:

string s = @"This is a string
that contains embedded new lines,
that will appear when this string is used."

How to use Object.values with typescript?

using Object.keys instead.

const data = {
  a: "first",
  b: "second",

const values = Object.keys(data).map(key => data[key]);

const commaJoinedValues = values.join(",");

IE9 jQuery AJAX with CORS returns "Access is denied"

Building off the accepted answer by @dennisg, I accomplished this successfully using jQuery.XDomainRequest.js by MoonScript.

The following code worked correctly in Chrome, Firefox and IE10, but failed in IE9. I simply included the script and it now automagically works in IE9. (And probably 8, but I haven't tested it.)

var displayTweets = function () {
        cache: false,
        type: 'GET',
        crossDomain: true,
        url: Site.config().apiRoot + '/Api/GetTwitterFeed',
        contentType: 'application/json; charset=utf-8',
        dataType: 'json',
        success: function (data) {
            for (var tweet in data) {

CSS, Images, JS not loading in IIS

You probably have Windows authentication enabled in your web.config. On a local machine, your Windows credentials are automatically passed and it works. On a live site, you are treated as an anonymous user (IE setting can control this, but don't modify this unless you really know what you are doing).

This causes the following:

  • You are required to explicitly login.
  • Resources like scripts and CSS are not served on the login page because you are not authenticated.

This isn't broken, just working as intended, but to "fix" this:

  • Change the authentication type in the web.config if you don't want any login.
  • And/or add a web.config in the directory(s) containing CSS, images, scripts, etc. which specifies authorization rules.

How to set the title text color of UIButton?

referring to radio buttons ,you can also do it with Segmented Control as following:

step 1: drag a segmented control to your view in the attribute inspector change the title of the two segments ,for example "Male" and "Female"

step 2: create an outlet & an action for it in the code

step 3: create a variable for future use to contain choice's data

in the code do as following:

@IBOutlet weak var genderSeg: UISegmentedControl!

var genderPick : String = ""

 @IBAction func segAction(_ sender: Any) {

    if genderSeg.selectedSegmentIndex == 0 {
         genderPick = "Male"
    } else if genderSeg.selectedSegmentIndex == 1 {
        genderPick = "Female"

python location on mac osx

I have a cook recipe for finding things in linux/macos

First update the locate db then do a

locate WHATiWANTtoSEARCH | less

do a /find to find what you are looking for.

to update your locate db in macos do this:

sudo /usr/libexec/locate.updatedb

it sometimes takes a while. Hope this helps :)

Recover from git reset --hard?

The information is lost.

Since you did not commit, your .git never stored this information. So, basically git cannot recover it for you.

But, If you just did git diff, there is a way you can recover using the terminal output with the following 3 simple steps.

  1. scroll your terminal and look for the o/p of git diff. Save the o/p in a file called diff.patch
  2. Search & Replace all 7 spaces and 8 spaces with tab(\t) character and save the changes.
  3. Go into your git repository. Apply the diff.patch (patch -p1 < diff.patch)

You are saved! :)

Note : While you are copying the data from terminal to a file, be careful and clearly see that the data is continuous output and did not contain any redundant data(due to pressing up and down arrows). Otherwise you might mess it up.

Java Error opening registry key

You will find a folder named "Oracle" on ProgramData folder in your windows installed drive. Remove the folder. Hope it will work. In my case my install drive is C and my path is C:\ProgramData\Oracle

Click in OK button inside an Alert (Selenium IDE)

assertAlert ought to do the trick. I see in the docs that alerts generated in a page's OnLoad event handler cannot be scripted this way (and have experienced it myself, alas, due to the ASP.NET page lifecycle). Could that be what you're running into?

How to get date, month, year in jQuery UI datepicker?

$("#date").datepicker('getDate').getMonth() + 1; 

The month on the datepicker is 0 based (0-11), so add 1 to get the month as it appears in the date.

How do I set log4j level on the command line?

log4j does not support this directly.

As you do not want a configuration file, you most likely use programmatic configuration. I would suggest that you look into scanning all the system properties, and explicitly program what you want based on this.

How do I parse an ISO 8601-formatted date?

I have found ciso8601 to be the fastest way to parse ISO 8601 timestamps. As the name suggests, it is implemented in C.

import ciso8601

The GitHub Repo README shows their >10x speedup versus all of the other libraries listed in the other answers.

My personal project involved a lot of ISO 8601 parsing. It was nice to be able to just switch the call and go 10x faster. :)

Edit: I have since become a maintainer of ciso8601. It's now faster than ever!

C#: Assign same value to multiple variables in single statement

Something a little shorter in syntax but taking what the others have already stated.

int num1, num2 = num1 = 1;

Android Studio is slow (how to speed up)?

I've quickly resolved this issue by upgrading gradle (Android Studio seems to use old version).

1) Download latest version ( and unpack somewhere.
2) Update path in Android Studio: File > Settings > Build, Ex../Gradle

How to right align widget in horizontal linear layout Android?

linear layout with layout_width="fill_parent" and also the widget with same layout width + gravity as right would align it to the right.

I'm using 2 TextViews in following example, topicTitle on the left and topicQuestions on the right.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android=""


        android:textStyle="bold" />

        android:textStyle="bold" />



DataTable: Hide the Show Entries dropdown but keep the Search box

If you're using Angular you can use the following code to do the same.

in component.html

<table id="" datatable [dtOptions]="dtOptions" class="table dataTable">

and in your component.ts

 dtOptions: any = {}

 this.dtOptions = {
  searching: true,    //enables the search bar
  info: false        //disables the entry information

there more option for data table available please visit here to learn more

What is the default database path for MongoDB?

I depends on the version and the distro.

For example the default download pre-2.2 from the MongoDB site uses: /data/db but the Ubuntu install at one point used to use: var/lib/mongodb.

I think these have been standardised now so that 2.2+ will only use data/db whether it comes from direct download on the site or from the repos.

Regular expression that doesn't contain certain string


In Java this will find all files ending in ".ftl" but not ending in ".inc.ftl", which is exactly what I wanted.

Android get image path from drawable as string

based on the some of above replies i improvised it a bit

create this method and call it by passing your resource

Reusable Method

public String getURLForResource (int resourceId) {
    //use BuildConfig.APPLICATION_ID instead of R.class.getPackage().getName() if both are not same
    return Uri.parse("android.resource://"+R.class.getPackage().getName()+"/" +resourceId).toString();

Sample call


complete example of loading image

String imageUrl = getURLForResource(R.drawable.personIcon);
// Load image

you can move the function getURLForResource to a Util file and make it static so it can be reused

What is the difference between Jupyter Notebook and JupyterLab?

To answer your question directly:

The single most important difference between the two is that you should start using JupyterLab straight away, and that you should not worry about Jupyter Notebook at all. Because:

JupyterLab will eventually replace the classic Jupyter Notebook. Throughout this transition, the same notebook document format will be supported by both the classic Notebook and JupyterLab

But you would also like to also know this:

Other posts have suggested that Jupyter Notebook (JN) could potentially be easier to use than JupyterLab (JL) for beginners. But I would have to disagree.

A great advantage with JL, and arguably one of the most important differences between JL and JN, is that you can more easily run a single line and even highlighted text. I prefer using a keyboard shortcut for this, and assigning shortcuts is pretty straight-forward.

And the fact that you can execute code in a Python console makes JL much more fun to work with. Other answers have already mentioned this, but JL can in some ways be considered a tool to run Notebooks and more. So the way I use JupyterLab is by having it set up with an .ipynb file, a file browser and a python console like this:

enter image description here

And now you have these tools at your disposal:

  1. View Files, running kernels, Commands, Notebook Tools, Open Tabs or Extension manager
  2. Run cells using, among other options, Ctrl+Enter
  3. Run single expression, line or highlighted text using menu options or keyboard shortcuts
  4. Run code directly in a console using Shift+Enter
  5. Inspect variables, dataframes or plots quickly and easily in a console without cluttering your notebook output.

How to increment a JavaScript variable using a button press event

<script type="text/javascript">
var i=0;

function increase()
    return false;
}</script><input type="button" onclick="increase();">

UITableView Separator line

Set the separatorStyle of the tableview to UITableViewCellSeparatorStyleNone. Add your separator image as subview to each cell and set the frame properly.

Iframe positioning

you should use position: relative; for one iframe and position:absolute; for the second;

Example: for first iframe use:

<div id="contentframe" style="position:relative; top: 100px; left: 50px;">

for second iframe use:

<div id="contentframe" style="position:absolute; top: 0px; left: 690px;">

How do I remove/delete a folder that is not empty?


This example shows how to remove a directory tree on Windows where some of the files have their read-only bit set. It uses the onerror callback to clear the readonly bit and reattempt the remove. Any subsequent failure will propagate.

import os, stat
import shutil

def remove_readonly(func, path, _):
    "Clear the readonly bit and reattempt the removal"
    os.chmod(path, stat.S_IWRITE)

shutil.rmtree(directory, onerror=remove_readonly)

How to programmatically connect a client to a WCF service?

You can also do what the "Service Reference" generated code does

public class ServiceXClient : ClientBase<IServiceX>, IServiceX
    public ServiceXClient() { }

    public ServiceXClient(string endpointConfigurationName) :
        base(endpointConfigurationName) { }

    public ServiceXClient(string endpointConfigurationName, string remoteAddress) :
        base(endpointConfigurationName, remoteAddress) { }

    public ServiceXClient(string endpointConfigurationName, EndpointAddress remoteAddress) :
        base(endpointConfigurationName, remoteAddress) { }

    public ServiceXClient(Binding binding, EndpointAddress remoteAddress) :
        base(binding, remoteAddress) { }

    public bool ServiceXWork(string data, string otherParam)
        return base.Channel.ServiceXWork(data, otherParam);

Where IServiceX is your WCF Service Contract

Then your client code:

var client = new ServiceXClient(new WSHttpBinding(SecurityMode.None), new EndpointAddress("http://localhost:911"));
client.ServiceXWork("data param", "otherParam param");

NoClassDefFoundError on Maven dependency

Choosing to Project -> Clean should resolve this

Entity framework code-first null foreign key

I have the same problem now , I have foreign key and i need put it as nullable, to solve this problem you should put

        .HasMany(c => c.Users)
        .WithOptional(c => c.Country)
        .HasForeignKey(c => c.CountryId)

in DBContext class I am sorry for answer you very late :)

How to animate RecyclerView items when they appear

Made Simple with XML only

Visit Gist Link


<?xml version="1.0" encoding="utf-8"?>
    <layoutAnimation xmlns:android=""
        android:delay="15%" />


<set xmlns:android=""





Use in layouts and recylcerview like:

    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

Error type 3 Error: Activity class {} does not exist

Besides the cases that the first upvoted comment provided, there is another case can cause this error: the output apk file cannot be replaced by Android Studio, you can manually delete it and build again, it should work.

If you did not change the output path, the default apk output path is {Your Project Path}/app/build/outputs/apk/debug/app-debug.apk

How to allocate aligned memory only using the standard library?

Three slightly different answers depending how you look at the question:

1) Good enough for the exact question asked is Jonathan Leffler's solution, except that to round up to 16-aligned, you only need 15 extra bytes, not 16.


/* allocate a buffer with room to add 0-15 bytes to ensure 16-alignment */
void *mem = malloc(1024+15);
ASSERT(mem); // some kind of error-handling code
/* round up to multiple of 16: add 15 and then round down by masking */
void *ptr = ((char*)mem+15) & ~ (size_t)0x0F;



2) For a more generic memory allocation function, the caller doesn't want to have to keep track of two pointers (one to use and one to free). So you store a pointer to the 'real' buffer below the aligned buffer.


void *mem = malloc(1024+15+sizeof(void*));
if (!mem) return mem;
void *ptr = ((char*)mem+sizeof(void*)+15) & ~ (size_t)0x0F;
((void**)ptr)[-1] = mem;
return ptr;


if (ptr) free(((void**)ptr)[-1]);

Note that unlike (1), where only 15 bytes were added to mem, this code could actually reduce the alignment if your implementation happens to guarantee 32-byte alignment from malloc (unlikely, but in theory a C implementation could have a 32-byte aligned type). That doesn't matter if all you do is call memset_16aligned, but if you use the memory for a struct then it could matter.

I'm not sure off-hand what a good fix is for this (other than to warn the user that the buffer returned is not necessarily suitable for arbitrary structs) since there's no way to determine programatically what the implementation-specific alignment guarantee is. I guess at startup you could allocate two or more 1-byte buffers, and assume that the worst alignment you see is the guaranteed alignment. If you're wrong, you waste memory. Anyone with a better idea, please say so...

[Added: The 'standard' trick is to create a union of 'likely to be maximally aligned types' to determine the requisite alignment. The maximally aligned types are likely to be (in C99) 'long long', 'long double', 'void *', or 'void (*)(void)'; if you include <stdint.h>, you could presumably use 'intmax_t' in place of long long (and, on Power 6 (AIX) machines, intmax_t would give you a 128-bit integer type). The alignment requirements for that union can be determined by embedding it into a struct with a single char followed by the union:

struct alignment
    char     c;
        intmax_t      imax;
        long double   ldbl;
        void         *vptr;
        void        (*fptr)(void);
    }        u;
} align_data;
size_t align = (char *)&align_data.u.imax - &align_data.c;

You would then use the larger of the requested alignment (in the example, 16) and the align value calculated above.

On (64-bit) Solaris 10, it appears that the basic alignment for the result from malloc() is a multiple of 32 bytes.

In practice, aligned allocators often take a parameter for the alignment rather than it being hardwired. So the user will pass in the size of the struct they care about (or the least power of 2 greater than or equal to that) and all will be well.

3) Use what your platform provides: posix_memalign for POSIX, _aligned_malloc on Windows.

4) If you use C11, then the cleanest - portable and concise - option is to use the standard library function aligned_alloc that was introduced in this version of the language specification.

How does a Java HashMap handle different objects with the same hash code?

The hashcode determines which bucket for the hashmap to check. If there is more than one object in the bucket then a linear search is done to find which item in the bucket equals the desired item (using the equals()) method.

In other words, if you have a perfect hashcode then hashmap access is constant, you will never have to iterate through a bucket (technically you would also have to have MAX_INT buckets, the Java implementation may share a few hash codes in the same bucket to cut down on space requirements). If you have the worst hashcode (always returns the same number) then your hashmap access becomes linear since you have to search through every item in the map (they're all in the same bucket) to get what you want.

Most of the time a well written hashcode isn't perfect but is unique enough to give you more or less constant access.

How to read values from properties file?

Configure PropertyPlaceholder in your context:

<context:property-placeholder location="classpath*"/>

Then you refer to the properties in your beans:

class MyClass {
  private String[] myValues;

EDIT: updated the code to parse property with mutliple comma-separated values:,bbb,ccc

If that doesnt work, you can define a bean with properties, inject and process it manually:

<bean id="myProperties"
  <property name="locations">

and the bean:

class MyClass {
  private Properties myProperties;

  public void init() {
    // do whatever you need with properties

decimal vs double! - Which one should I use and when?

For money: decimal. It costs a little more memory, but doesn't have rounding troubles like double sometimes has.

CSS3's border-radius property and border-collapse:collapse don't mix. How can I use border-radius to create a collapsed table with rounded corners?

I am new with HTML and CSS and I was also looking for solution for this, here what I find.

table,th,td {
   border: 1px solid black;
   border-spacing: 0
/* add border-radius to table only*/
table {
   border-radius: 25px    
/* then add border-radius to top left border of left heading cell */
th:first-child {
   border-radius: 25px 0 0 0
/* then add border-radius to top right border of right heading cell */
th:last-child {
   border-radius: 0 25px 0 0
/* then add border-radius to bottom left border of left cell of last row */
tr:last-child td:first-child {
   border-radius: 0 0 0 25px
/* then add border-radius to bottom right border of right cell of last row */
tr:last-child td:last-child {
   border-radius: 0 0 25px 0

I try it, guess what it works :)

Opening port 80 EC2 Amazon web services

  1. Check what security group you are using for your instance. See value of Security Groups column in row of your instance. It's important - I changed rules for default group, but my instance was under quickstart-1 group when I had similar issue.
  2. Go to Security Groups tab, go to Inbound tab, select HTTP in Create a new rule combo-box, leave in source field and click Add Rule, then Apply rule changes.

Android: why is there no maxHeight for a View?

Have you tried using the layout_weight value? If you set one it to a value greater than 0, it will stretch that view into the remaining space available.

If you had multiple views that needed to be stretched, then the value will become a weight between them.

So if you had two views both set to a layout_weight value of 1, then they would both stretch to fill in the space but they would both stretch to an equal amount of space. If you set one of them to the value of 2, then it would stretch twice as much as the other view.

Some more info here listed under Linear Layout.

UITableView - change section header color

You can do this if you want header with custom color:

[[UITableViewHeaderFooterView appearance] setTintColor:[UIColor redColor]];

This solution works great since iOS 6.0.

What jar should I include to use javax.persistence package in a hibernate based application?

For JPA 2.1 the javax.persistence package can be found in here:


See: hibernate-jpa-2.1-api on Maven Central The pattern seems to be to change the artefact name as the JPA version changes. If this continues new versions can be expected to arrive in Maven Central here: Hibernate JPA versions

The above JPA 2.1 APi can be used in conjunction with Hibernate 4.3.7, specifically:


Ways to implement data versioning in MongoDB

I worked through this solution that accommodates a published, draft and historical versions of the data:

  published: {},
  draft: {},
  history: {
    "1" : {
      metadata: <value>,
      document: {}

I explain the model further here:

For those that may implement something like this in Java, here's an example:

Including all the code that you can fork, if you like

Unix's 'ls' sort by name

Check your .bashrc file for aliases.

How to spyOn a value property (rather than a method) with Jasmine

The best way is to use spyOnProperty. It expects 3 parameters and you need to pass get or set as a third param.


const div = fixture.debugElement.query(By.css('.ellipsis-overflow'));
// now mock properties
spyOnProperty(div.nativeElement, 'clientWidth', 'get').and.returnValue(1400);
spyOnProperty(div.nativeElement, 'scrollWidth', 'get').and.returnValue(2400);

Here I am setting the get of clientWidth of div.nativeElement object.

How to match hyphens with Regular Expression?

Is this what you are after?

MatchCollection matches = Regex.Matches(mystring, "-");

Replace specific characters within strings


            group <- c('12357e', '12575e', '12575e', ' 197e18',  'e18947')

            pattern <- "e"  
            replacement <-  ""  
            group <- str_replace(group, pattern, replacement)      

[1] "12357"  "12575"  "12575"  " 19718" "18947" 

Powershell script to check if service is started, if not then start it

Combining Alaa Akoum and Nick Eagle's solutions allowed me to loop through a series of windows services and stop them if they're running.

# stop the following Windows services in the specified order:
[Array] $Services = 'Service1','Service2','Service3','Service4','Service5';

# loop through each service, if its running, stop it
foreach($ServiceName in $Services)
    $arrService = Get-Service -Name $ServiceName
    write-host $ServiceName
    while ($arrService.Status -eq 'Running')
        Stop-Service $ServiceName
        write-host $arrService.status
        write-host 'Service stopping'
        Start-Sleep -seconds 60
        if ($arrService.Status -eq 'Stopped')
              Write-Host 'Service is now Stopped'

The same can be done to start a series of service if they are not running:

# start the following Windows services in the specified order:
[Array] $Services = 'Service1','Service2','Service3','Service4','Service5';

# loop through each service, if its not running, start it
foreach($ServiceName in $Services)
    $arrService = Get-Service -Name $ServiceName
    write-host $ServiceName
    while ($arrService.Status -ne 'Running')
        Start-Service $ServiceName
        write-host $arrService.status
        write-host 'Service starting'
        Start-Sleep -seconds 60
        if ($arrService.Status -eq 'Running')
          Write-Host 'Service is now Running'

Scroll to a div using jquery

First get the position of the div element upto which u want to scroll by jQuery position() method.
Example : var pos = $("div").position();
Then get the y cordinates (height) of that element with ".top" method.
Example :;
Then get the x cordinates of the that div element with ".left" method.
These methods are originated from CSS positioning.
Once we get x & y cordinates, then we can use javascript's scrollTo(); method.
This method scrolls the document upto specific height & width.
It takes two parameters as x & y cordinates. Syntax : window.scrollTo(x,y);
Then just pass the x & y cordinates of the DIV element in the scrollTo() function.
Refer the example below ↓ ↓

            Scroll upto Div with jQuery.
        <script src=""></script>
            $(document).ready(function () {
                $("#button1").click(function () {
                    var x = $("#element").position(); //gets the position of the div element...
                    window.scrollTo(x.left,; //window.scrollTo() scrolls the page upto certain position....
                    //it takes 2 parameters : (x axis cordinate, y axis cordinate);
        <button id="button1">
            Click here to scroll

        <div id="element" style="position:absolute;top:200%;left:0%;background-color:orange;height:100px;width:200px;">
            The DIV element.

jquery (or pure js) simulate enter key pressed for testing

For those who want to do this in pure javascript, look at:

Using standard KeyboardEvent

As Joe comment it, KeyboardEvent is now the standard.

Same example to fire an enter (keyCode 13):

const ke = new KeyboardEvent('keydown', {
    bubbles: true, cancelable: true, keyCode: 13

You can use this page help you to find the right keyboard event.

Outdated answer:

You can do something like (here for Firefox)

var ev = document.createEvent('KeyboardEvent');
// Send key '13' (= enter)
    'keydown', true, true, window, false, false, false, false, 13, 0);

IPython Notebook save location

If you're using IPython 4.x/Jupyter, run

$ jupyter notebook --generate-config

This will create a file in ~/.jupyter. This file already has a line starting with # c.NotebookApp.notebook_dir=u''.

All you need to do is to uncomment this line and change the value to your desired location, e.g., c.NotebookApp.notebook_dir=u'/home/alice/my_ipython_notebooks'

Check last modified date of file in C#

You simply want the File.GetLastWriteTime static method.


var lastModified = System.IO.File.GetLastWriteTime("C:\");

Console.WriteLine(lastModified.ToString("dd/MM/yy HH:mm:ss"));

Note however that in the rare case the last-modified time is not updated by the system when writing to the file (this can happen intentionally as an optimisation for high-frequency writing, e.g. logging, or as a bug), then this approach will fail, and you will instead need to subscribe to file write notifications from the system, constantly listening.

What is a daemon thread in Java?

Daemon threads are like a service providers for other threads or objects running in the same process as the daemon thread. Daemon threads are used for background supporting tasks and are only needed while normal threads are executing. If normal threads are not running and remaining threads are daemon threads then the interpreter exits.

For example, the HotJava browser uses up to four daemon threads named "Image Fetcher" to fetch images from the file system or network for any thread that needs one.

Daemon threads are typically used to perform services for your application/applet (such as loading the "fiddley bits"). The core difference between user threads and daemon threads is that the JVM will only shut down a program when all user threads have terminated. Daemon threads are terminated by the JVM when there are no longer any user threads running, including the main thread of execution.

setDaemon(true/false) ? This method is used to specify that a thread is daemon thread.

public boolean isDaemon() ? This method is used to determine the thread is daemon thread or not.


public class DaemonThread extends Thread {
    public void run() {
        System.out.println("Entering run method");

        try {
            System.out.println("In run Method: currentThread() is" + Thread.currentThread());

            while (true) {
                try {
                } catch (InterruptedException x) {}

                System.out.println("In run method: woke up again");
        } finally {
            System.out.println("Leaving run Method");
    public static void main(String[] args) {
        System.out.println("Entering main Method");

        DaemonThread t = new DaemonThread();

        try {
        } catch (InterruptedException x) {}

        System.out.println("Leaving main method");




C:\java\thread>java DaemonThread
Entering main Method
Entering run method
In run Method: currentThread() isThread[Thread-0,5,main]
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
Leaving main method


The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead

  1. Why is this happening?

    The entire ext/mysql PHP extension, which provides all functions named with the prefix mysql_, was officially deprecated in PHP v5.5.0 and removed in PHP v7.

    It was originally introduced in PHP v2.0 (November 1997) for MySQL v3.20, and no new features have been added since 2006. Coupled with the lack of new features are difficulties in maintaining such old code amidst complex security vulnerabilities.

    The manual has contained warnings against its use in new code since June 2011.

  2. How can I fix it?

    As the error message suggests, there are two other MySQL extensions that you can consider: MySQLi and PDO_MySQL, either of which can be used instead of ext/mysql. Both have been in PHP core since v5.0, so if you're using a version that is throwing these deprecation errors then you can almost certainly just start using them right away—i.e. without any installation effort.

    They differ slightly, but offer a number of advantages over the old extension including API support for transactions, stored procedures and prepared statements (thereby providing the best way to defeat SQL injection attacks). PHP developer Ulf Wendel has written a thorough comparison of the features. has an excellent tutorial on migrating from ext/mysql to PDO.

  3. I understand that it's possible to suppress deprecation errors by setting error_reporting in php.ini to exclude E_DEPRECATED:

    error_reporting = E_ALL ^ E_DEPRECATED

    What will happen if I do that?

    Yes, it is possible to suppress such error messages and continue using the old ext/mysql extension for the time being. But you really shouldn't do this—this is a final warning from the developers that the extension may not be bundled with future versions of PHP (indeed, as already mentioned, it has been removed from PHP v7). Instead, you should take this opportunity to migrate your application now, before it's too late.

    Note also that this technique will suppress all E_DEPRECATED messages, not just those to do with the ext/mysql extension: therefore you may be unaware of other upcoming changes to PHP that would affect your application code. It is, of course, possible to only suppress errors that arise on the expression at issue by using PHP's error control operator—i.e. prepending the relevant line with @—however this will suppress all errors raised by that expression, not just E_DEPRECATED ones.

What should you do?

  • You are starting a new project.

    There is absolutely no reason to use ext/mysql—choose one of the other, more modern, extensions instead and reap the rewards of the benefits they offer.

  • You have (your own) legacy codebase that currently depends upon ext/mysql.

    It would be wise to perform regression testing: you really shouldn't be changing anything (especially upgrading PHP) until you have identified all of the potential areas of impact, planned around each of them and then thoroughly tested your solution in a staging environment.

    • Following good coding practice, your application was developed in a loosely integrated/modular fashion and the database access methods are all self-contained in one place that can easily be swapped out for one of the new extensions.

      Spend half an hour rewriting this module to use one of the other, more modern, extensions; test thoroughly. You can later introduce further refinements to reap the rewards of the benefits they offer.

    • The database access methods are scattered all over the place and cannot easily be swapped out for one of the new extensions.

      Consider whether you really need to upgrade to PHP v5.5 at this time.

      You should begin planning to replace ext/mysql with one of the other, more modern, extensions in order that you can reap the rewards of the benefits they offer; you might also use it as an opportunity to refactor your database access methods into a more modular structure.

      However, if you have an urgent need to upgrade PHP right away, you might consider suppressing deprecation errors for the time being: but first be sure to identify any other deprecation errors that are also being thrown.

  • You are using a third party project that depends upon ext/mysql.

    Consider whether you really need to upgrade to PHP v5.5 at this time.

    Check whether the developer has released any fixes, workarounds or guidance in relation to this specific issue; or, if not, pressure them to do so by bringing this matter to their attention. If you have an urgent need to upgrade PHP right away, you might consider suppressing deprecation errors for the time being: but first be sure to identify any other deprecation errors that are also being thrown.

    It is absolutely essential to perform regression testing.

blur vs focusout -- any real differences?

The documentation for focusout says (emphasis mine):

The focusout event is sent to an element when it, or any element inside of it, loses focus. This is distinct from the blur event in that it supports detecting the loss of focus on descendant elements (in other words, it supports event bubbling).

The same distinction exists between the focusin and focus events.

Python Array with String Indices

Even better, try an OrderedDict (assuming you want something like a list). Closer to a list than a regular dict since the keys have an order just like list elements have an order. With a regular dict, the keys have an arbitrary order.

Note that this is available in Python 3 and 2.7. If you want to use with an earlier version of Python you can find installable modules to do that.

How do I disable orientation change on Android?

I've always found you need both

android:screenOrientation="nosensor" android:configChanges="keyboardHidden|orientation"

Perl - Multiple condition if statement without duplicating code?

I don't recommend storing passwords in a script, but this is a way to what you indicate:

use 5.010;
my %user_table = ( tom => '123!', frank => '321!' );

say ( $user_table{ $name } eq $password ? 'You have gained access.'
    :                                     'Access denied!'

Any time you want to enforce an association like this, it's a good idea to think of a table, and the most common form of table in Perl is the hash.

Create, read, and erase cookies with jQuery

Use JavaScript Cookie plugin

Set a cookie

Cookies.set("example", "foo"); // Sample 1
Cookies.set("example", "foo", { expires: 7 }); // Sample 2
Cookies.set("example", "foo", { path: '/admin', expires: 7 }); // Sample 3

Get a cookie

alert( Cookies.get("example") );

Delete the cookie

Cookies.remove('example', { path: '/admin' }) // Must specify path if used when setting.

How can you remove all documents from a collection with Mongoose?

In MongoDB, the db.collection.remove() method removes documents from a collection. You can remove all documents from a collection, remove all documents that match a condition, or limit the operation to remove just a single document.

Source: Mongodb.

If you are using mongo sheel, just do:


In your case, you need:

You didn't show me the delete button, so this button is just an example:

<a class="button__delete"></a>

Change the controller to:

exports.destroy = function(req, res, next) {
    Datetime.remove({}, function(err) {
            if (err) {
            } else {

Insert this ajax delete method in your client js file:

            $('.button__delete').click(function() {
                var dataId = $(this).attr('data-id');

                if (confirm("are u sure?")) {
                        type: 'DELETE',
                        url: '/',
                        success: function(response) {
                            if (response == 'error') {
                            else {
                } else {

Uninstalling Android ADT

The only way to remove the ADT plugin from Eclipse is to go to Help > About Eclipse/About ADT > Installation Details.

Select a plug-in you want to uninstall, then click Uninstall... button at the bottom.

enter image description here

If you cannot remove ADT from this location, then your best option is probably to start fresh with a clean Eclipse install.

How do I resolve this "ORA-01109: database not open" error?

If your database is down then during login as SYSDBA you can assume this. While login command will be executed like sqlplus sys/sys_password as sysdba that time you will get "connected to idle instance" reply from database. This message indicates your database is down. You should need to check first alert.log file about why database is down. If you found it was downed normally then you can issue "startup" command for starting database and after that execute your create user command. If you found database is having issue like missing datafile or something else then you need to recover database first and open database for executing your create user command.

"alter database open" command only accepted by database while it is on Mount stage. If database is down then it won't accept "alter database open" command.

How can I export the schema of a database in PostgreSQL?

You should use something like this pg_dump --schema=your_schema_name db1, for details take a look here

jquery, selector for class within id

You can use the class selector along with descendant selector

$("#my_id .my_class")

Android: android.content.res.Resources$NotFoundException: String resource ID #0x5

You are assigning a numeric value to a text field. You have to convert the numeric value to a string with:


Access-Control-Allow-Origin: * in tomcat

Please check your web.xml again. You might be making some silly mistake. As my application is working fine with the same init-param configuration...

Please copy paste the web.xml, if the problem still persists.

URLEncoder not able to translate space character

The other answers either present a manual string replacement, URLEncoder which actually encodes for HTML format, Apache's abandoned URIUtil, or using Guava's UrlEscapers. The last one is fine, except it doesn't provide a decoder.

Apache Commons Lang provides the URLCodec, which encodes and decodes according to URL format rfc3986.

String encoded = new URLCodec().encode(str);
String decoded = new URLCodec().decode(str);

If you are already using Spring, you can also opt to use its UriUtils class as well.

Objective-C - Remove last character from string

If it's an NSMutableString (which I would recommend since you're changing it dynamically), you can use:

[myString deleteCharactersInRange:NSMakeRange([myRequestString length]-1, 1)];

jQuery Selector: Id Ends With?

Since this is ASP.NET, you can simply use the ASP <%= %> tag to print the generated ClientID of txtTitle:

$('<%= txtTitle.ClientID %>')

This will result in...


... when the page is rendered.

Note: In Visual Studio, Intellisense will yell at you for putting ASP tags in JavaScript. You can ignore this as the result is valid JavaScript.

Logging best practices

I don't often develop in, however when it comes to loggers I think a lot of best practices are universal. Here are some of my random thoughts on logging that I have learned over the years:


  • Use a logger abstraction framework - like slf4j (or roll your own), so that you decouple the logger implementation from your API. I have seen a number of logger frameworks come and go and you are better off being able to adopt a new one without much hassle.
  • Try to find a framework that supports a variety of output formats.
  • Try to find a framework that supports plugins / custom filters.
  • Use a framework that can be configured by external files, so that your customers / consumers can tweak the log output easily so that it can be read by commerical log management applications with ease.
  • Be sure not to go overboard on custom logging levels, otherwise you may not be able to move to different logging frameworks.

Logger Output

  • Try to avoid XML/RSS style logs for logging that could encounter catastrophic failures. This is important because if the power switch is shut off without your logger writing the closing </xxx> tag, your log is broken.
  • Log threads. Otherwise, it can be very difficult to track the flow of your program.
  • If you have to internationalize your logs, you may want to have a developer only log in English (or your language of choice).
  • Sometimes having the option to insert logging statements into SQL queries can be a lifesaver in debugging situations. Such as:
    -- Invoking Class: com.foocorp.foopackage.FooClass:9021
    SELECT * FROM foo;
  • You want class-level logging. You normally don't want static instances of loggers as well - it is not worth the micro-optimization.
  • Marking and categorizing logged exceptions is sometimes useful because not all exceptions are created equal. So knowing a subset of important exceptions a head of time is helpful, if you have a log monitor that needs to send notifications upon critical states.
  • Duplication filters will save your eyesight and hard disk. Do you really want to see the same logging statement repeated 10^10000000 times? Wouldn't it be better just to get a message like: This is my logging statement - Repeated 100 times

Also see this question of mine.

Python FileNotFound

try block should be around open. Not around prompt.

while True:
    prompt = input("\n Hello to Sudoku valitator,"
    "\n \n Please type in the path to your file and press 'Enter': ")
        sudoku = open(prompt, 'r').readlines()
    except FileNotFoundError:
        print("Wrong file or file path")

python-How to set global variables in Flask?


global index_add_counter

You are not defining, just declaring so it's like saying there is a global index_add_counter variable elsewhere, and not create a global called index_add_counter. As you name don't exists, Python is telling you it can not import that name. So you need to simply remove the global keyword and initialize your variable:

index_add_counter = 0

Now you can import it with:

from app import index_add_counter

The construction:

global index_add_counter

is used inside modules' definitions to force the interpreter to look for that name in the modules' scope, not in the definition one:

index_add_counter = 0
def test():
  global index_add_counter # means: in this scope, use the global name

Is there a way to set background-image as a base64 encoded image?

I tried this (and worked for me):

var img = 'data:image/png;base64, ...'; //place ur base64 encoded img here = 'url(\'' + img + '\')';

ES6 syntax:

let img = 'data:image/png;base64, ...' = `url('${img}')`

A bit better:

let setBackground = src => { = `url('${src}')`

let node = nodeIGotFromDOM, img = imageBase64EncodedFromMyGF;, img);

Retina displays, high-res background images

If you are planing to use the same image for retina and non-retina screen then here is the solution. Say that you have a image of 200x200 and have two icons in top row and two icon in bottom row. So, it's four quadrants.

.sprite-of-icons {
  background: url("../images/icons-in-four-quad-of-200by200.png") no-repeat;
  background-size: 100px 100px /* Scale it down to 50% rather using 200x200 */

.sp-logo-1 { background-position: 0 0; }

/* Reduce positioning of the icons down to 50% rather using -50px */
.sp-logo-2 { background-position: -25px 0 }
.sp-logo-3 { background-position: 0 -25px }
.sp-logo-3 { background-position: -25px -25px }

Scaling and positioning of the sprite icons to 50% than actual value, you can get the expected result.

Another handy SCSS mixin solution by Ryan Benhase.


@mixin background-2x($path, $ext: "png", $w: auto, $h: auto, $pos: left top, $repeat: no-repeat) {

  $at1x_path: "#{$path}.#{$ext}";
  $at2x_path: "#{$path}@2x.#{$ext}";

  background-image: url("#{$at1x_path}");
  background-size: $w $h;
  background-position: $pos;
  background-repeat: $repeat;

  @media all and (-webkit-min-device-pixel-ratio : 1.5),
  all and (-o-min-device-pixel-ratio: 3/2),
  all and (min--moz-device-pixel-ratio: 1.5),
  all and (min-device-pixel-ratio: 1.5) {
    background-image: url("#{$at2x_path}"); 

div.background {
  @include background-2x( 'path/to/image', 'jpg', 100px, 100px, center center, repeat-x );

For more info about above mixin READ HERE.

How to parse freeform street/postal address out of text, and into components

libpostal: an open-source library to parse addresses, training with data from OpenStreetMap, OpenAddresses and OpenCage. (more info about it)

Other tools/services:

JavaScript associative array to JSON

Arrays should only have entries with numerical keys (arrays are also objects but you really should not mix these).

If you convert an array to JSON, the process will only take numerical properties into account. Other properties are simply ignored and that's why you get an empty array as result. Maybe this more obvious if you look at the length of the array:

> AssocArray.length

What is often referred to as "associative array" is actually just an object in JS:

var AssocArray = {};  // <- initialize an object, not an array
AssocArray["a"] = "The letter A"

console.log("a = " + AssocArray["a"]); // "a = The letter A"
JSON.stringify(AssocArray); // "{"a":"The letter A"}"

Properties of objects can be accessed via array notation or dot notation (if the key is not a reserved keyword). Thus AssocArray.a is the same as AssocArray['a'].

Disable and later enable all table indexes in Oracle

You should try sqlldr's SKIP_INDEX_MAINTENANCE parameter.

How to install a private NPM module without my own registry?

FWIW: I had problems with all of these answers when dealing with a private organization repository.

The following worked for me:

npm install -S "git+https://[email protected]/orgname/repositoryname.git"

For example:

npm install -S "git+https://[email protected]/netflix/private-repository.git"

I'm not entirely sure why the other answers didn't work for me in this one case, because they're what I tried first before I hit Google and found this answer. And the other answers are what I've done in the past.

Hopefully this helps someone else.

When is the @JsonProperty property used and what is it used for?

well for what its worth now... JsonProperty is ALSO used to specify getter and setter methods for the variable apart from usual serialization and deserialization. For example suppose you have a payload like this:

  "check": true

and a Deserializer class:

public class Check {

  @JsonProperty("check")    // It is needed else Jackson will look got getCheck method and will fail
  private Boolean check;

  public Boolean isCheck() {
     return check;

Then in this case JsonProperty annotation is neeeded. However if you also have a method in the class

public class Check {

  //@JsonProperty("check")    Not needed anymore
  private Boolean check;

  public Boolean getCheck() {
     return check;

Have a look at this documentation too:

How to get a ListBox ItemTemplate to stretch horizontally the full width of the ListBox?

I also had the same problem, as a quick workaround, I used blend to determine how much padding was being added. In my case it was 12, so I used a negative margin to get rid of it. Now everything can now be centered properly

Target elements with multiple classes, within one rule

Just in case someone stumbles upon this like I did and doesn't realise, the two variations above are for different use cases.

The following:

.blue-border, .background {
    border: 1px solid #00f;
    background: #fff;

is for when you want to add styles to elements that have either the blue-border or background class, for example:

<div class="blue-border">Hello</div>
<div class="background">World</div>
<div class="blue-border background">!</div>

would all get a blue border and white background applied to them.

However, the accepted answer is different.

.blue-border.background {
    border: 1px solid #00f;
    background: #fff;

This applies the styles to elements that have both classes so in this example only the <div> with both classes should get the styles applied (in browsers that interpret the CSS properly):

<div class="blue-border">Hello</div>
<div class="background">World</div>
<div class="blue-border background">!</div>

So basically think of it like this, comma separating applies to elements with one class OR another class and dot separating applies to elements with one class AND another class.

ImportError: No module named 'encodings'

For Windows10 User.

I was using python3.4 on Windows10. I installed python3.5. I couldn't find PYTHONPATH, PYTHONHOME env variable. If I command python in CMD console, It kept using python3.4. I deleted python3.4. Whenever I command python in CMD console, it starts showing an error like below.

Fatal Python error: Py_Initialize: Unable to get the locale encoding
ImportError: No module named 'encodings'

I searched to figure out my problem. Solution was simple. When you install python3.5, you can custom install and check Add Python to environment variables in Advanced Options.

I just leave here for case that someone have similar issues visit here so that they don't waste their precious time much to figure out.

Change Volley timeout duration

 * @param request
 * @param <T>
public <T> void addToRequestQueue(Request<T> request) {

    request.setRetryPolicy(new DefaultRetryPolicy(


How to select a dropdown value in Selenium WebDriver using Java

You can use following methods to handle drop down in selenium.

  1. driver.selectByVisibleText("Text");
  2. driver.selectByIndex(1);
  3. driver.selectByValue("prog");

For more details you can refer this post.

It will definately help you a lot in resolving your queries.

Create a batch file to run an .exe with an additional parameter

Found another solution for the same. It will be more helpful.

START C:\"Program Files (x86)"\Test\"Test Automation"\finger.exe ConfigFile="C:\Users\PCName\Desktop\Automation\Documents\Validation_ZoneWise_Default.finger.Config"

finger.exe is a parent program that is calling config solution. Note: if your path folder name consists of spaces, then do not forget to add "".

Retrieve specific commit from a remote Git repository

You only clone once, so if you already have a clone of the remote repository, pulling from it won't download everything again. Just indicate what branch you want to pull, or fetch the changes and checkout the commit you want.

Fetching from a new repository is very cheap in bandwidth, as it will only download the changes you don't have. Think in terms of Git making the right thing, with minimum load.

Git stores everything in .git folder. A commit can't be fetched and stored in isolation, it needs all its ancestors. They are interrelated.

To reduce download size you can however ask git to fetch only objects related to a specific branch or commit:

git fetch origin refs/heads/branch:refs/remotes/origin/branch

This will download only commits contained in remote branch branch (and only the ones that you miss), and store it in origin/branch. You can then merge or checkout.

You can also specify only a SHA1 commit:

git fetch origin 96de5297df870:refs/remotes/origin/foo-commit

This will download only the commit of the specified SHA-1 96de5297df870 (and its ancestors that you miss), and store it as (non-existing) remote branch origin/foo-commit.

bootstrap 3 - how do I place the brand in the center of the navbar?

To fix the overlap, you only need modify the .navbar-toggle in your own css styles

something like this, it works for me:

z-index: 10;

Finding elements not in a list

>>> item = set([0,1,2,3,4,5,6,7,8,9])
>>> z = set([2,3,4])
>>> print item - z
set([0, 1, 5, 6, 7, 8, 9])

How can I change the Java Runtime Version on Windows (7)?

If you are using windows 10 or windows server 2012, the steps to change the java runtime version is this:

  1. Open regedit using 'Run'
  2. Navigate to HKEY_LOCAL_MACHINE -> SOFTWARE -> JavaSoft -> Java Runtime Environment
  3. Here you will see all the versions of java you installed on your PC. For me I have several versions of java 1.8 installed, so the folder displayed here are 1.8, 1.8.0_162 and 1.8.0_171
  4. Click the '1.8' folder, then double click the JavaHome and RuntimeLib keys, Change the version number inside to whichever Java version you want your PC to run on. For example, if the Value data of the key is 'C:\Program Files\Java\jre1.8.0_171', you can change this to 'C:\Program Files\Java\jre1.8.0_162'.
  5. You can then verify the version change by typing 'java -version' on the command line.

Avoiding NullPointerException in Java

This to me sounds like a reasonably common problem that junior to intermediate developers tend to face at some point: they either don't know or don't trust the contracts they are participating in and defensively overcheck for nulls. Additionally, when writing their own code, they tend to rely on returning nulls to indicate something thus requiring the caller to check for nulls.

To put this another way, there are two instances where null checking comes up:

  1. Where null is a valid response in terms of the contract; and

  2. Where it isn't a valid response.

(2) is easy. Either use assert statements (assertions) or allow failure (for example, NullPointerException). Assertions are a highly-underused Java feature that was added in 1.4. The syntax is:

assert <condition>


assert <condition> : <object>

where <condition> is a boolean expression and <object> is an object whose toString() method's output will be included in the error.

An assert statement throws an Error (AssertionError) if the condition is not true. By default, Java ignores assertions. You can enable assertions by passing the option -ea to the JVM. You can enable and disable assertions for individual classes and packages. This means that you can validate code with the assertions while developing and testing, and disable them in a production environment, although my testing has shown next to no performance impact from assertions.

Not using assertions in this case is OK because the code will just fail, which is what will happen if you use assertions. The only difference is that with assertions it might happen sooner, in a more-meaningful way and possibly with extra information, which may help you to figure out why it happened if you weren't expecting it.

(1) is a little harder. If you have no control over the code you're calling then you're stuck. If null is a valid response, you have to check for it.

If it's code that you do control, however (and this is often the case), then it's a different story. Avoid using nulls as a response. With methods that return collections, it's easy: return empty collections (or arrays) instead of nulls pretty much all the time.

With non-collections it might be harder. Consider this as an example: if you have these interfaces:

public interface Action {
  void doSomething();

public interface Parser {
  Action findAction(String userInput);

where Parser takes raw user input and finds something to do, perhaps if you're implementing a command line interface for something. Now you might make the contract that it returns null if there's no appropriate action. That leads the null checking you're talking about.

An alternative solution is to never return null and instead use the Null Object pattern:

public class MyParser implements Parser {
  private static Action DO_NOTHING = new Action() {
    public void doSomething() { /* do nothing */ }

  public Action findAction(String userInput) {
    // ...
    if ( /* we can't find any actions */ ) {
      return DO_NOTHING;


Parser parser = ParserFactory.getParser();
if (parser == null) {
  // now what?
  // this would be an example of where null isn't (or shouldn't be) a valid response
Action action = parser.findAction(someInput);
if (action == null) {
  // do nothing
} else {



which is a much better design because it leads to more concise code.

That said, perhaps it is entirely appropriate for the findAction() method to throw an Exception with a meaningful error message -- especially in this case where you are relying on user input. It would be much better for the findAction method to throw an Exception than for the calling method to blow up with a simple NullPointerException with no explanation.

try {
} catch(ActionNotFoundException anfe) {

Or if you think the try/catch mechanism is too ugly, rather than Do Nothing your default action should provide feedback to the user.

public Action findAction(final String userInput) {
    /* Code to return requested Action if found */
    return new Action() {
        public void doSomething() {
            userConsole.err("Action not found: " + userInput);

How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?

NSString * path = [[NSBundle mainBundle] pathForResource:@"filename" ofType:@"jpg"];
UIImage * img = [[UIImage alloc]initWithContentsOfFile:path];
CGImageRef image = [img CGImage];
CFDataRef data = CGDataProviderCopyData(CGImageGetDataProvider(image));
const unsigned char * buffer =  CFDataGetBytePtr(data);

What is the difference between putting a property on application.yml or bootstrap.yml in spring boot?

Another use for bootstrap.yml is to load configuration from kubernetes configmap and secret resources. The application must import the spring-cloud-starter-kubernetes dependency.

As with the Spring Cloud Config, this has to take place during the bootstrap phrase.

From the docs :

    name: cloud-k8s-app
        name: default-name
        namespace: default-namespace
         # Spring Cloud Kubernetes looks up a ConfigMap named c1 in namespace default-namespace
         - name: c1

So properties stored in the configmap resource with default-name can be referenced just the same as properties in application.yml

And the same process applies to secrets :

    name: cloud-k8s-app
        name: default-name
        namespace: default-namespace
         # Spring Cloud Kubernetes looks up a Secret named s1 in namespace default-namespace
         - name: s1

What is the recommended project structure for spring boot rest projects?

There is a somehow recommended directory structure mentioned at

You can create a api folder and put your controllers there.

If you have some configuration beans, put them in a separate package too.

How to Cast Objects in PHP

PHP provides a very simple way of doing this by using:

(object) ['id'=>1,'name'=>'cat']

In your case you try this:

$dog = json_encode($dog);

$cat = (object) json_decode($dog)

More optimize method is:

$dog = (array)$dog;
$dog['newfield'] = 'xyz';
$dog = (object)$dog;

Why does Oracle not find oci.dll?

I notice that recent Oracle client installers change file permissions.

I had Oracle 12.0.1 32 bit client installed for a year. I recently installed Oracle 12.0.1 64 bit client. The Oracle install change ALL file permissions in the 32 bit folders.

My application suddenly failed to run.

I used PROCMON.EXE ( and noticed that permission was denied opening OCI.DLL

I changed the permissions for everything in the Oracle client folders and application works as expected.

Explaining the 'find -mtime' command

+1 means 2 days ago. It's rounded.

Script @php artisan package:discover handling the post-autoload-dump event returned with error code 1

in this case, I use space for APP_NAME key in .env file.

and have below error :

The environment file is invalid!
Failed to parse dotenv file due to unexpected whitespace. Failed at [my name].
Script @php artisan package:discover handling the post-autoload-dump event returned with error code 1

Don't use space in APP_NAME key !!

How do you show animated GIFs on a Windows Form (c#)

Public Class Form1

    Private animatedimage As New Bitmap("C:\MyData\Search.gif")
    Private currentlyanimating As Boolean = False

    Private Sub OnFrameChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)


    End Sub

    Private Sub AnimateImage()

        If currentlyanimating = True Then
            ImageAnimator.Animate(animatedimage, AddressOf Me.OnFrameChanged)
            currentlyanimating = False
        End If

    End Sub

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)

        e.Graphics.DrawImage(animatedimage, New Point((Me.Width / 4) + 40, (Me.Height / 4) + 40))

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        BtnStop.Enabled = False

    End Sub

    Private Sub BtnStop_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnStop.Click

        currentlyanimating = False
        ImageAnimator.StopAnimate(animatedimage, AddressOf Me.OnFrameChanged)
        BtnStart.Enabled = True
        BtnStop.Enabled = False

    End Sub

    Private Sub BtnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnStart.Click

        currentlyanimating = True
        BtnStart.Enabled = False
        BtnStop.Enabled = True

    End Sub

End Class

Writing an input integer into a cell

You can use the Range object in VBA to set the value of a named cell, just like any other cell.

Range("C1").Value = Inputbox("Which job number would you like to add to the list?)

Where "C1" is the name of the cell you want to update.

My Excel VBA is a little bit old and crusty, so there may be a better way to do this in newer versions of Excel.

Getter and Setter?

Update: Don't use this answer since this is very dumb code that I found while I learn. Just use plain getter and setter, it's much better.

I usually using that variable name as function name, and add optional parameter to that function so when that optional parameter is filled by caller, then set it to the property and return $this object (chaining) and then when that optional parameter not specified by caller, i just return the property to the caller.

My example:

class Model
     private $propOne;
     private $propTwo;

     public function propOne($propVal = '')
          if ($propVal === '') {
              return $this->propOne;
          } else {
              $this->propOne = $propVal;
              return $this;

     public function propTwo($propVal = '')
          if ($propVal === '') {
              return $this->propTwo;
          } else {
              $this->propTwo = $propVal;
              return $this;

How to check if a float value is a whole number

We can use the modulo (%) operator. This tells us how many remainders we have when we divide x by y - expresses as x % y. Every whole number must divide by 1, so if there is a remainder, it must not be a whole number.

This function will return a boolean, True or False, depending on whether n is a whole number.

def is_whole(n):
    return n % 1 == 0

angular.js ng-repeat li items with html content

ng-bind-html-unsafe is deprecated from 1.2. The correct answer should be currently:

HTML-side: (the same as the accepted answer stated):

<div ng-app ng-controller="MyCtrl">
      <li ng-repeat=" opt in opts" ng-bind-html-unsafe="opt.text">
        {{ opt.text }}


But in the controller-side:

myApp.controller('myCtrl', ['$scope', '$sce', function($scope, $sce) {
// ...
   $ { 
      opt = $sce.trustAsHtml(opt);

Simple If/Else Razor Syntax

To get rid of the if/else awkwardness you could use a using block:

    var count = 0;
    foreach (var item in Model)
        using(Html.TableRow(new { @class = (count++ % 2 == 0) ? "alt-row" : "" }))
                @Html.DisplayFor(modelItem => item.Title)
                @Html.Truncate(item.Details, 75)
                <img src="@Url.Content("~/Content/Images/Projects/")@item.Images.Where(i => i.IsMain == true).Select(i => i.Name).Single()" 
                    alt="@item.Images.Where(i => i.IsMain == true).Select(i => i.AltText).Single()" class="thumb" />
                @Html.ActionLink("Edit", "Edit", new { id=item.ProjectId }) |
                @Html.ActionLink("Details", "Details", new { id = item.ProjectId }) |
                @Html.ActionLink("Delete", "Delete", new { id=item.ProjectId })

Reusable element that make it easier to add attributes:

//Block is take from
public class TableRow : Block
    private object _htmlAttributes;
    private TagBuilder _tr;

    public TableRow(HtmlHelper htmlHelper, object htmlAttributes) : base(htmlHelper)
        _htmlAttributes = htmlAttributes;

    public override void BeginBlock()
        _tr = new TagBuilder("tr");

    protected override void EndBlock()

Helper method to make razor syntax clearer:

public static TableRow TableRow(this HtmlHelper self, object htmlAttributes)
    var tableRow = new TableRow(self, htmlAttributes);
    return tableRow;

Session 'app': Error Launching activity

I've fixed the issue using this solution.If you are running the application in USB device then close all the virtual device like : genymotion / virtual machine .

How to get GET (query string) variables in Express.js on Node.js?

There are 2 ways to pass parameters via GET method

Method 1 : The MVC approach where you pass the parameters like /routename/:paramname
In this case you can use req.params.paramname to get the parameter value For Example refer below code where I am expecting Id as a param
link could be like :

var express = require('express');
var app = express();
app.get("items/:id", function(req, res) {
    var id =;
    //further operations to perform

Method 2 : General Approach : Passing variables as query string using '?' operator
For Example refer below code where I am expecting Id as a query parameter
link could be like :

var express = require('express');
var app = express();
app.get("/items", function(req, res) {
    var id =;
    //further operations to perform

Android Eclipse - Could not find *.apk

Clean the project and it will do. Sometimes it happens unknowingly but keep trying to solve using diff methods.

Getting value GET OR POST variable using JavaScript?

* getGET: [Funcion que captura las variables pasados por GET]_x000D_
* @Implementacion [pagina.html?id=10&pos=3]_x000D_
* @param  {[const ]} loc           [capturamos la url]_x000D_
* @return {[array]} get [Devuelve un array de clave=>valor]_x000D_
const getGET = () => {_x000D_
    const loc = document.location.href;_x000D_
            // si existe el interrogante_x000D_
            // cogemos la parte de la url que hay despues del interrogante_x000D_
            const getString = loc.split('?')[1];_x000D_
            // obtenemos un array con cada clave=valor_x000D_
            const GET = getString.split('&');_x000D_
            const get = {};_x000D_
            // recorremos todo el array de valores_x000D_
            for(let i = 0, l = GET.length; i < l; i++){_x000D_
                const tmp = GET[i].split('=');_x000D_
                get[tmp[0]] = unescape(decodeURI(tmp[1]));_x000D_
            }//::END for_x000D_
            return get;_x000D_
        }//::END if _x000D_
}//::END getGET_x000D_
* [DOMContentLoaded]_x000D_
* @param  {[const]} valores  [Cogemos los valores pasados por get]_x000D_
* @return {[document.write]}       _x000D_
document.addEventListener('DOMContentLoaded', () => {_x000D_
    const valores=getGET();_x000D_
            // hacemos un bucle para pasar por cada indice del array de valores_x000D_
            for(const index in valores){_x000D_
                document.write(`<br>clave: ${index} - valor: ${valores[index]}`);_x000D_
            }//::END for_x000D_
            // no se ha recibido ningun parametro por GET_x000D_
            document.write("<br>No se ha recibido ningún parámetro");_x000D_
        }//::END if_x000D_
});//::END DOMContentLoaded

How to view file diff in git before commit

Another technique to consider if you want to compare a file to the last commit which is more pedantic:

git diff master myfile.txt

The advantage with this technique is you can also compare to the penultimate commit with:

git diff master^ myfile.txt

and the one before that:

git diff master^^ myfile.txt

Also you can substitute '~' for the caret '^' character and 'you branch name' for 'master' if you are not on the master branch.

Live search through table rows

I used the previous answers and combine them to create:

Search any columns by hide rows and highlighting

Css for highlight found texts:

em {
   background-color: yellow


function removeHighlighting(highlightedElements) {
   highlightedElements.each(function() {
      var element = $(this);

function addHighlighting(element, textToHighlight) {
   var text = element.text();
   var highlightedText = '<em>' + textToHighlight + '</em>';
   var newText = text.replace(textToHighlight, highlightedText);


$("#search").keyup(function() {
   var value = this.value.toLowerCase().trim();

   removeHighlighting($("table tr em"));

   $("table tr").each(function(index) {
      if (!index) return;
      $(this).find("td").each(function() {
         var id = $(this).text().toLowerCase().trim();
         var matchedIndex = id.indexOf(value);
         if (matchedIndex === 0) {
            addHighlighting($(this), value);
         var not_found = (matchedIndex == -1);
         return not_found;

Demo here

Unable to cast object of type 'System.DBNull' to type 'System.String`

You can use C#'s null coalescing operator

return accountNumber ?? string.Empty;

Floating point exception

It's caused by n % x, when x is 0. You should have x start at 2 instead. You should not use floating point here at all, since you only need integer operations.

General notes:

  1. Try to format your code better. Focus on using a consistent style. E.g. you have one else that starts immediately after a if brace (not even a space), and another with a newline in between.
  2. Don't use globals unless necessary. There is no reason for q to be global.
  3. Don't return without a value in a non-void (int) function.

When 1 px border is added to div, Div size increases, Don't want to do that

I needed to be able to "border" any element by adding a class and not affect its dimensions. A good solution for me was to use box-shadow. But in some cases the effect was not visible due to other siblings. So I combined both typical box-shadow as well as inset box-shadow. The result is a border look without changing any dimensions.

Values separated by comma. Here's a simple example:

.add_border {
    box-shadow:-1px 0 1px 1px rgba(0, 0, 0, 0.75), inset -1px 0 0 1px rgba(0, 0, 0, 0.75);


Adjust for your preferred look and you're good to go!

Keep CMD open after BAT file executes

javac -d C:\xxx\lib\ -classpath C:\xxx\lib\ *.java

cmd cd C:\xxx\yourbat.bat

the second command make your cmd window not be closed. The important thing is you still able to input new command

How to check queue length in Python

Yes we can check the length of queue object created from collections.

from collections import deque
class Queue():
    def __init__(self,batchSize=32):
        #self.batchSie = batchSize
        self._queue = deque(maxlen=batchSize)

    def enqueue(self, items):
        ''' Appending the items to the queue'''

    def dequeue(self):
        '''remoe the items from the top if the queue becomes full '''
        return self._queue.popleft()

Creating an object of class

q = Queue(batchSize=64)

Now retrieving the length of the queue

#check the len of queue
#you can print the content of the queue
#Can check the content of the queue
#Check the length of retrieved item 

check the results in attached screen shot

enter image description here

Hope this helps...

How can I read the client's machine/computer name from the browser?

Well you could get the ip address using, then do a reverse DNS lookup on the ip to get the hostname.

From the ASP.NET Developer's cookbook ... Performing a Reverse-DNS Lookup.

Pass object to javascript function

when you pass an object within curly braces as an argument to a function with one parameter , you're assigning this object to a variable which is the parameter in this case

How do you join on the same table, twice, in mysql?

you'd use another join, something along these lines:

SELECT toD.dom_url AS ToURL, 
    fromD.dom_url AS FromUrl, 

FROM reviews AS rvw

LEFT JOIN domain AS toD 
    ON toD.Dom_ID = rvw.rev_dom_for

LEFT JOIN domain AS fromD 
    ON fromD.Dom_ID = rvw.rev_dom_from


All you're doing is joining in the table multiple times. Look at the query in the post: it selects the values from the Reviews tables (aliased as rvw), that table provides you 2 references to the Domain table (a FOR and a FROM).

At this point it's a simple matter to left join the Domain table to the Reviews table. Once (aliased as toD) for the FOR, and a second time (aliased as fromD) for the FROM.

Then in the SELECT list, you will select the DOM_URL fields from both LEFT JOINS of the DOMAIN table, referencing them by the table alias for each joined in reference to the Domains table, and alias them as the ToURL and FromUrl.

For more info about aliasing in SQL, read here.

Load HTML File Contents to Div [without the use of iframes]

I'd suggest getting into one of the JS libraries out there. They ensure compatibility so you can get up and running really fast. jQuery and DOJO are both really great. To do what you're trying to do in jQuery, for example, it would go something like this:

<script type="text/javascript" language="JavaScript">
    url: "x.html", 
    context: document.body,
    success: function(response) {

String Resource new line /n not possible?

After I tried next solution

  • add \n
  • add \n without spaces after it
  • use "" and press Enter inside text
  • text with press Enter
  • use lines=2

What solves me is br tag

<string name="successfullyfeatured">successfully<br/> You are now a member</string>


the most reliable solution is to use Translation editor and edit text and it will handle new lines for you

JUnit Eclipse Plugin?

Junit is included by default with Eclipse (at least the Java EE version I'm sure). You may just need to add the view to your perspective.

The response content cannot be parsed because the Internet Explorer engine is not available, or

In your invoke web request just use the parameter -UseBasicParsing

e.g. in your script (line 2) you should use:

$rss = Invoke-WebRequest -UseBasicParsing

According to the documentation, this parameter is necessary on systems where IE isn't installed or configured.

Uses the response object for HTML content without Document Object Model (DOM) parsing. This parameter is required when Internet Explorer is not installed on the computers, such as on a Server Core installation of a Windows Server operating system.

How to get a specific column value from a DataTable in c#

The table normally contains multiple rows. Use a loop and use row.Field<string>(0) to access the value of each row.

foreach(DataRow row in dt.Rows)
    string file = row.Field<string>("File");

You can also access it via index:

foreach(DataRow row in dt.Rows)
    string file = row.Field<string>(0);

If you expect only one row, you can also use the indexer of DataRowCollection:

string file = dt.Rows[0].Field<string>(0); 

Since this fails if the table is empty, use dt.Rows.Count to check if there is a row:

if(dt.Rows.Count > 0)
    file = dt.Rows[0].Field<string>(0);

Check if a time is between two times (time DataType)

select *
from MyTable
where CAST(Created as time) not between '07:00' and '22:59:59 997'

Unable to install packages in latest version of RStudio and R Version.3.1.1

My solution that worked was to open R studio options and select global miror (the field was empty before) and the error went away.

Python Pandas - Find difference between two data frames

edit2, I figured out a new solution without the need of setting index


Okay i found the answer of highest vote already contain what I have figured out. Yes, we can only use this code on condition that there are no duplicates in each two dfs.

I have a tricky method. First we set ’Name’ as the index of two dataframe given by the question. Since we have same ’Name’ in two dfs, we can just drop the ’smaller’ df’s index from the ‘bigger’ df. Here is the code.


Using an integer as a key in an associative array in JavaScript

Use an object - with an integer as the key - rather than an array.

How to load URL in UIWebView in Swift?

You can load a page like this :

let url: URL = URL(string:"")!
webView.loadRequest(URLRequest.init(url: url))

Or the one-line approach :

webView.loadRequest(URLRequest.init(url: URL(string: "")!))

webView is your outlet var.

AttributeError: 'module' object has no attribute

All the above answers are great, but I'd like to chime in here. If you did not spot any issue mentioned above, try clear up your working environment. It worked for me.

How to use patterns in a case statement?

Brace expansion doesn't work, but *, ? and [] do. If you set shopt -s extglob then you can also use extended pattern matching:

  • ?() - zero or one occurrences of pattern
  • *() - zero or more occurrences of pattern
  • +() - one or more occurrences of pattern
  • @() - one occurrence of pattern
  • !() - anything except the pattern

Here's an example:

shopt -s extglob
for arg in apple be cd meet o mississippi
    # call functions based on arguments
    case "$arg" in
        a*             ) foo;;    # matches anything starting with "a"
        b?             ) bar;;    # matches any two-character string starting with "b"
        c[de]          ) baz;;    # matches "cd" or "ce"
        me?(e)t        ) qux;;    # matches "met" or "meet"
        @(a|e|i|o|u)   ) fuzz;;   # matches one vowel
        m+(iss)?(ippi) ) fizz;;   # matches "miss" or "mississippi" or others
        *              ) bazinga;; # catchall, matches anything not matched above

Java: Static Class?

comment on the "private constructor" arguments: come on, developers are not that stupid; but they ARE lazy. creating an object then call static methods? not gonna happen.

don't spend too much time to make sure your class cannot be misused. have some faith for your colleagues. and there is always a way to misuse your class no matter how you protect it. the only thing that cannot be misused is a thing that is completely useless.

How to bind Close command to a button

For .NET 4.5 SystemCommands class will do the trick (.NET 4.0 users can use WPF Shell Extension google - Microsoft.Windows.Shell or Nicholas Solution).

        <CommandBinding Command="{x:Static SystemCommands.CloseWindowCommand}" 
                        Executed="CloseWindow_Exec" />
    <!-- Binding Close Command to the button control -->
    <Button ToolTip="Close Window" Content="Close" Command="{x:Static SystemCommands.CloseWindowCommand}"/>

In the Code Behind you can implement the handlers like this:

    private void CloseWindow_CanExec(object sender, CanExecuteRoutedEventArgs e)
        e.CanExecute = true;

    private void CloseWindow_Exec(object sender, ExecutedRoutedEventArgs e)

SQL Server find and replace specific word in all rows of specific column

You can also export the database and then use a program like notepad++ to replace words and then inmport aigain.

Convert String to Float in Swift

extension String {    
    func floatValue() -> Float? {
        return Float(self)

Best practices for API versioning?

This is a good and a tricky question. The topic of URI design is at the same time the most prominent part of a REST API and, therefore, a potentially long-term commitment towards the users of that API.

Since evolution of an application and, to a lesser extent, its API is a fact of life and that it's even similar to the evolution of a seemingly complex product like a programming language, the URI design should have less natural constraints and it should be preserved over time. The longer the application's and API's lifespan, the greater the commitment to the users of the application and API.

On the other hand, another fact of life is that it is hard to foresee all the resources and their aspects that would be consumed through the API. Luckily, it is not necessary to design the entire API which will be used until Apocalypse. It is sufficient to correctly define all the resource end-points and the addressing scheme of every resource and resource instance.

Over time you may need to add new resources and new attributes to each particular resource, but the method that API users follow to access a particular resources should not change once a resource addressing scheme becomes public and therefore final.

This method applies to HTTP verb semantics (e.g. PUT should always update/replace) and HTTP status codes that are supported in earlier API versions (they should continue to work so that API clients that have worked without human intervention should be able to continue to work like that).

Furthermore, since embedding of API version into the URI would disrupt the concept of hypermedia as the engine of application state (stated in Roy T. Fieldings PhD dissertation) by having a resource address/URI that would change over time, I would conclude that API versions should not be kept in resource URIs for a long time meaning that resource URIs that API users can depend on should be permalinks.

Sure, it is possible to embed API version in base URI but only for reasonable and restricted uses like debugging a API client that works with the the new API version. Such versioned APIs should be time-limited and available to limited groups of API users (like during closed betas) only. Otherwise, you commit yourself where you shouldn't.

A couple of thoughts regarding maintenance of API versions that have expiration date on them. All programming platforms/languages commonly used to implement web services (Java, .NET, PHP, Perl, Rails, etc.) allow easy binding of web service end-point(s) to a base URI. This way it's easy to gather and keep a collection of files/classes/methods separate across different API versions.

From the API users POV, it's also easier to work with and bind to a particular API version when it's this obvious but only for limited time, i.e. during development.

From the API maintainer's POV, it's easier to maintain different API versions in parallel by using source control systems that predominantly work on files as the smallest unit of (source code) versioning.

However, with API versions clearly visible in URI there's a caveat: one might also object this approach since API history becomes visible/aparent in the URI design and therefore is prone to changes over time which goes against the guidelines of REST. I agree!

The way to go around this reasonable objection, is to implement the latest API version under versionless API base URI. In this case, API client developers can choose to either:

  • develop against the latest one (committing themselves to maintain the application protecting it from eventual API changes that might break their badly designed API client).

  • bind to a specific version of the API (which becomes apparent) but only for a limited time

For example, if API v3.0 is the latest API version, the following two should be aliases (i.e. behave identically to all API requests):


In addition, API clients that still try to point to the old API should be informed to use the latest previous API version, if the API version they're using is obsolete or not supported anymore. So accessing any of the obsolete URIs like these:


should return any of the 30x HTTP status codes that indicate redirection that are used in conjunction with Location HTTP header that redirects to the appropriate version of resource URI which remain to be this one:


There are at least two redirection HTTP status codes that are appropriate for API versioning scenarios:

  • 301 Moved permanently indicating that the resource with a requested URI is moved permanently to another URI (which should be a resource instance permalink that does not contain API version info). This status code can be used to indicate an obsolete/unsupported API version, informing API client that a versioned resource URI been replaced by a resource permalink.

  • 302 Found indicating that the requested resource temporarily is located at another location, while requested URI may still supported. This status code may be useful when the version-less URIs are temporarily unavailable and that a request should be repeated using the redirection address (e.g. pointing to the URI with APi version embedded) and we want to tell clients to keep using it (i.e. the permalinks).

  • other scenarios can be found in Redirection 3xx chapter of HTTP 1.1 specification

Why use a READ UNCOMMITTED isolation level?

I always use READ UNCOMMITTED now. It's fast with the least issues. When using other isolations you will almost always come across some Blocking issues.

As long as you use Auto Increment fields and pay a little more attention to inserts then your fine, and you can say goodbye to blocking issues.

You can make errors with READ UNCOMMITED but to be honest, it is very easy make sure your inserts are full proof. Inserts/Updates which use the results from a select are only thing you need to watch out for. (Use READ COMMITTED here, or ensure that dirty reads aren't going to cause a problem)

So go the Dirty Reads (Specially for big reports), your software will run smoother...

phpMyAdmin on MySQL 8.0

in my case, to fix it I preferred to create a new user to use with PhpMyAdmin because modifying the root user has caused native login problems with other applications such as MySQL WorkBench.

This is what I did:

  • Log in to MySQL console with root user: mysql -u root -p, enter your password.
  • Let’s create a new user within the MySQL shell:
CREATE USER 'newMySqlUsername'@'localhost' IDENTIFIED WITH mysql_native_password BY 'mysqlNewUsernamePassword';
  • At this point the newMysqlUsername has no permissions to do anything with the databases. So is needed to provide the user with access to the information they will need.
GRANT ALL PRIVILEGES ON * . * TO ' newMySqlUsername'@'localhost';
  • Once you have finalized the permissions that you want to set up for your new users, always be sure to reload all the privileges.
  • Log out by typing quit or \q, and your changes will now be in effect, we can log in into PhpMyAdmin with the new user and it will have access to the databases.

  • Also you can log back in with this command in terminal:

mysql -u newMySqlUsername -p

How to send post request to the below post method using postman rest client

1.Open postman app 2.Enter the URL in the URL bar in postman app along with the name of the design.Use slash(/) after URL to give the design name. 3.Select POST from the dropdown list from URL textbox. 4.Select raw from buttons available below the URL textbox. 5.Select JSON from the dropdown. 6.In the text area enter your data to be updated and enter send. 7.Select GET from dropdown list from URL textbox and enter send to see the updated result.

jQuery how to find an element based on a data-attribute value?

Without JQuery, ES6


I know the question is about JQuery, but readers may want a pure JS method.

How do you create a toggle button?

The good semantic way would be to use a checkbox, and then style it in different ways if it is checked or not. But there are no good ways do to it. You have to add extra span, extra div, and, for a really nice look, add some javascript.

So the best solution is to use a small jQuery function and two background images for styling the two different statuses of the button. Example with an up/down effect given by borders:

$(document).ready(function() {_x000D_
  $('a#button').click(function() {_x000D_
a {_x000D_
  background: #ccc;_x000D_
  cursor: pointer;_x000D_
  border-top: solid 2px #eaeaea;_x000D_
  border-left: solid 2px #eaeaea;_x000D_
  border-bottom: solid 2px #777;_x000D_
  border-right: solid 2px #777;_x000D_
  padding: 5px 5px;_x000D_
a.down {_x000D_
  background: #bbb;_x000D_
  border-top: solid 2px #777;_x000D_
  border-left: solid 2px #777;_x000D_
  border-bottom: solid 2px #eaeaea;_x000D_
  border-right: solid 2px #eaeaea;_x000D_
<script src=""></script>_x000D_
<a id="button" title="button">Press Me</a>

Obviously, you can add background images that represent button up and button down, and make the background color transparent.

How to make a class JSON serializable

I like Onur's answer but would expand to include an optional toJSON() method for objects to serialize themselves:

def dumper(obj):
        return obj.toJSON()
        return obj.__dict__
print json.dumps(some_big_object, default=dumper, indent=2)

How to make shadow on border-bottom?

New method for an old question

enter image description here

It seems like in the answers provided the issue was always how the box border would either be visible on the left and right of the object or you'd have to inset it so far that it didn't shadow the whole length of the container properly.

This example uses the :after pseudo element along with a linear gradient with transparency in order to put a drop shadow on a container that extends exactly to the sides of the element you wish to shadow.

Worth noting with this solution is that if you use padding on the element that you wish to drop shadow, it won't display correctly. This is because the after pseudo element appends it's content directly after the elements inner content. So if you have padding, the shadow will appear inside the box. This can be overcome by eliminating padding on outer container (where the shadow applies) and using an inner container where you apply needed padding.

Example with padding and background color on the shadowed div:

enter image description here

If you want to change the depth of the shadow, simply increase the height style in the after pseudo element. You can also obviously darken, lighten, or change colors in the linear gradient styles.

body {_x000D_
  background: #eee;_x000D_
.bottom-shadow {_x000D_
  width: 80%;_x000D_
  margin: 0 auto;_x000D_
.bottom-shadow:after {_x000D_
  content: "";_x000D_
  display: block;_x000D_
  height: 8px;_x000D_
  background: transparent;_x000D_
  background: -moz-linear-gradient(top, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0) 100%); /* FF3.6-15 */_x000D_
  background: -webkit-linear-gradient(top, rgba(0,0,0,0.4) 0%,rgba(0,0,0,0) 100%); /* Chrome10-25,Safari5.1-6 */_x000D_
  background: linear-gradient(to bottom, rgba(0,0,0,0.4) 0%,rgba(0,0,0,0) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */_x000D_
  filter: progid:DXImageTransform.Microsoft.gradient(   startColorstr='#a6000000', endColorstr='#00000000',GradientType=0 ); /* IE6-9 */_x000D_
.bottom-shadow div {_x000D_
  padding: 18px;_x000D_
  background: #fff;_x000D_
<div class="bottom-shadow">_x000D_
    Shadows, FTW!_x000D_

Reporting Services permissions on SQL Server R2 SSRS

This did the trick for me. Go down to step 35 to see the error you are getting. Paraphrasing:

Once you're able to log in to YourServer/Reports as an administrator, click Home in the top-right corner, then Folder Settings and New Role Assignment. Enter your user name and check a box for each role you want to grant yourself. Finally, click OK. You should now be able to browse folders without launching your browser with elevated privileges.

Don't forget to set the security at the site level **AND ** at the folder level. I hope that helps.


npm install error - MSB3428: Could not load the Visual C++ component "VCBuild.exe"

I know it's a very old question, but is the first in my google search and after some time I got how to solve this.

find node on your windows with
$ npm install -g which
$ which node
after cd into the directory, inside the directory cd into node_modules\npm folder and finally:
$ npm install node-gyp@latest
here worked, the answer is from this site

python tuple to dict

Here are couple ways of doing it:

>>> t = ((1, 'a'), (2, 'b'))

>>> # using reversed function
>>> dict(reversed(i) for i in t)
{'a': 1, 'b': 2}

>>> # using slice operator
>>> dict(i[::-1] for i in t)
{'a': 1, 'b': 2}

the easiest way to convert matrix to one row vector

You can use the function RESHAPE:

B = reshape(A.',1,[]);

ReDim Preserve to a Multi-Dimensional Array in Visual Basic 6

In regards to this:

"in my task I have to change the whole array (2 dimensions"

Just use a "jagged" array (ie an array of arrays of values). Then you can change the dimensions as you wish. You can have a 1-D array of variants, and the variants can contain arrays.

A bit more work perhaps, but a solution.

HTML Table cellspacing or padding just top / bottom


td {
  padding-top: 2px;
  padding-bottom: 2px;

T-SQL: Opposite to string concatenation - how to split string into multiple records

I wrote this awhile back. It assumes the delimiter is a comma and that the individual values aren't bigger than 127 characters. It could be modified pretty easily.

It has the benefit of not being limited to 4,000 characters.

Good luck!

ALTER Function [dbo].[SplitStr] ( 
        @txt text 
Returns @tmp Table 
                value varchar(127)
        declare @str varchar(8000) 
                , @Beg int 
                , @last int 
                , @size int 

        set @size=datalength(@txt) 
        set @Beg=1 

        set @str=substring(@txt,@Beg,8000) 
        IF len(@str)<8000 set @Beg=@size 
        ELSE BEGIN 
                set @last=charindex(',', reverse(@str)) 
                set @str=substring(@txt,@Beg,8000-@last) 
                set @Beg=@Beg+8000-@last+1 

        declare @workingString varchar(25) 
                , @stringindex int 

        while @Beg<=@size Begin 
                WHILE LEN(@str) > 0 BEGIN 
                        SELECT @StringIndex = CHARINDEX(',', @str) 

                                @workingString = CASE 
                                        WHEN @StringIndex > 0 THEN SUBSTRING(@str, 1, @StringIndex-1) 
                                        ELSE @str 

                        INSERT INTO 
                                (cast(rtrim(ltrim(@workingString)) as varchar(127)))
                        SELECT @str = CASE 
                                WHEN CHARINDEX(',', @str) > 0 THEN SUBSTRING(@str, @StringIndex+1, LEN(@str)) 
                                ELSE '' 
                set @str=substring(@txt,@Beg,8000) 

                if @Beg=@size set @Beg=@Beg+1 
                else IF len(@str)<8000 set @Beg=@size 
                ELSE BEGIN 
                        set @last=charindex(',', reverse(@str)) 
                        set @str=substring(@txt,@Beg,8000-@last) 
                        set @Beg=@Beg+8000-@last+1 



Styling the arrow on bootstrap tooltips

The arrow is a border.
You need to change for each arrow the color depending on the 'data-placement' of the tooltip. .tooltip-arrow {
  border-top-color: @color;
} .tooltip-arrow {
  border-top-color: @color;
} .tooltip-arrow {
.tooltip.right .tooltip-arrow {
  border-right-color: @color;
.tooltip.left .tooltip-arrow {
  border-left-color: @color;
.tooltip.bottom .tooltip-arrow {
  border-bottom-color: @color;
.tooltip.bottom-left .tooltip-arrow {
  border-bottom-color: @color;
.tooltip.bottom-right .tooltip-arrow {
  border-bottom-color: @color;
.tooltip > .tooltip-inner {
  background-color: @color;

How do I check if a Sql server string is null or empty

When dealing with VARCHAR/NVARCHAR data most other examples treat white-space the same as empty string which is equal to C# function IsNullOrWhiteSpace.

This version respects white-space and works the same as the C# function IsNullOrEmpty:

IIF(ISNULL(DATALENGTH(val), 0) = 0, whenTrueValue, whenFalseValue)

Simple test:

    '"' + val + '"' AS [StrValue],
    IIF(ISNULL(DATALENGTH(val), 0) = 0, 'TRUE', 'FALSE') AS IsNullOrEmpty
    (' '), 
    ('a ')
) S (val)

Using textures in THREE.js

Andrea solution is absolutely right, I will just write another implementation based on the same idea. If you took a look at the THREE.ImageUtils.loadTexture() source you will find it uses the javascript Image object. The $(window).load event is fired after all Images are loaded ! so at that event we can render our scene with the textures already loaded...

  • CoffeeScript

    $(document).ready ->
        material = new THREE.MeshLambertMaterial(map: THREE.ImageUtils.loadTexture("crate.gif"))
        sphere   = new THREE.Mesh(new THREE.SphereGeometry(radius, segments, rings), material)
        $(window).load ->
            renderer.render scene, camera
  • JavaScript

    $(document).ready(function() {
        material = new THREE.MeshLambertMaterial({ map: THREE.ImageUtils.loadTexture("crate.gif") });
        sphere = new THREE.Mesh(new THREE.SphereGeometry(radius, segments, rings), material);
        $(window).load(function() {
            renderer.render(scene, camera);


Bootstrap center heading

Per your comments, to center all headings all you have to do is add text-align:center to all of them at the same time, like so:


    h1, h2, h3, h4, h5, h6 {
        text-align: center;

Setting cursor at the end of any text of a textbox

Try like below... it will help you...

Some time in Window Form Focus() doesn't work correctly. So better you can use Select() to focus the textbox.

txtbox.Select(); // to Set Focus
txtbox.Select(txtbox.Text.Length, 0); //to set cursor at the end of textbox

How to append a newline to StringBuilder

Escape should be done with \, not /.

So r.append('\n'); or r.append("\n"); will work (StringBuilder has overloaded methods for char and String type).

Using multiple property files (via PropertyPlaceholderConfigurer) in multiple projects/modules

The PropertiesPlaceholderConfigurer bean has an alternative property called "propertiesArray". Use this instead of the "properties" property, and configure it with an <array> of property references.

Get elements by attribute when querySelectorAll is not available without using libraries?

Try this it works


example :


How do I convert two lists into a dictionary?

If you need to transform keys or values before creating a dictionary then a generator expression could be used. Example:

>>> adict = dict((str(k), v) for k, v in zip(['a', 1, 'b'], [2, 'c', 3])) 

Take a look Code Like a Pythonista: Idiomatic Python.

Can I find events bound on an element with jQuery?

General case:

  • Hit F12 to open Dev Tools
  • Click the Sources tab
  • On right-hand side, scroll down to Event Listener Breakpoints, and expand tree
  • Click on the events you want to listen for.
  • Interact with the target element, if they fire you will get a break point in the debugger

Similarly, you can:

  • right click on the target element -> select "Inspect element"
  • Scroll down on the right side of the dev frame, at the bottom is 'event listeners'.
  • Expand the tree to see what events are attached to the element. Not sure if this works for events that are handled through bubbling (I'm guessing not)

Scaling an image to fit on canvas

Provide the source image (img) size as the first rectangle:

ctx.drawImage(img, 0, 0, img.width,    img.height,     // source rectangle
                   0, 0, canvas.width, canvas.height); // destination rectangle

The second rectangle will be the destination size (what source rectangle will be scaled to).

Update 2016/6: For aspect ratio and positioning (ala CSS' "cover" method), check out:
Simulation background-size: cover in canvas

JavaFX FXML controller - constructor vs initialize method

The initialize method is called after all @FXML annotated members have been injected. Suppose you have a table view you want to populate with data:

class MyController { 
    TableView<MyModel> tableView; 

    public MyController() {
        tableView.getItems().addAll(getDataFromSource()); // results in NullPointerException, as tableView is null at this point. 

    public void initialize() {
        tableView.getItems().addAll(getDataFromSource()); // Perfectly Ok here, as FXMLLoader already populated all @FXML annotated members. 

Subversion stuck due to "previous operation has not finished"?

In my case, the error appeared when trying to commit from within an IDE. When I executed the commit of the same directories with TortoiseSVN in the explorer, the operation succeeded.

No 'Access-Control-Allow-Origin' header is present on the requested resource - Resteasy

Seems your resource POSTmethod won't get hit as @peeskillet mention. Most probably your ~POST~ request won't work, because it may not be a simple request. The only simple requests are GET, HEAD or POST and request headers are simple(The only simple headers are Accept, Accept-Language, Content-Language, Content-Type= application/x-www-form-urlencoded, multipart/form-data, text/plain).

Since in you already add Access-Control-Allow-Origin headers to your Response, you can add new OPTIONS method to your resource class.

@Path("{path : .*}")
public Response options() {
    return Response.ok("")
            .header("Access-Control-Allow-Origin", "*")
            .header("Access-Control-Allow-Headers", "origin, content-type, accept, authorization")
            .header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD")
            .header("Access-Control-Max-Age", "2000")

ISO time (ISO 8601) in Python

Adding a small variation to estani's excellent answer

Local to ISO 8601 with TimeZone and no microsecond info (Python 3):

import datetime, time

utc_offset_sec = time.altzone if time.localtime().tm_isdst else time.timezone
utc_offset = datetime.timedelta(seconds=-utc_offset_sec), tzinfo=datetime.timezone(offset=utc_offset)).isoformat()

Sample Output:


Tested that this output can be parsed by both Javascript Date and C# DateTime/DateTimeOffset

Get Character value from KeyCode in JavaScript... then trim

I know this is an old question, but I came across it today searching for a pre-packaged solution to this problem, and found nothing that really met my needs.

Here is a solution (English only) that correctly supports Upper Case (shifted), Lower Case, punctuation, number keypad, etc.

It also allows for simple and straight-forward identification of - and reaction to - non-printable keys, like ESC, Arrows, Function keys, etc.

keyboardCharMap and keyboardNameMap are the key to making this work

Thanks to DaveAlger for saving me some typing - and much discovery! - by providing the Named Key Array.

filtering a list using LINQ

var result = projects.Where(p => filtedTags.All(t => p.Tags.Contains(t)));

How to get the value from the GET parameters?

I use the parseUri library. It allows you to do exactly what you are asking for:

var uri = '';
var c = uri.queryKey['c'];
// c = 'm2-m3-m4-m5'

How to insert a row in an HTML table body in JavaScript

You can use the following example:

<table id="purches">
            <th>Transaction Date</th>
            <th>Transaction Amount</th>

    <!--  <tr th:each="person: ${list}"    >
            <td><li th:each="person: ${list}" th:text="|${person.description}|"></li></td>
            <td><li th:each="person: ${list}" th:text="|${person.price}|"></li></td>
            <td><li th:each="person: ${list}" th:text="|${person.available}|"></li></td>
            <td><li th:each="person: ${list}" th:text="|${person.from}|"></li></td>

    <tbody id="feedback">

JavaScript file:

    type: "POST",
    contentType: "application/json",
    url: "/search",
    data: JSON.stringify(search),
    dataType: 'json',
    cache: false,
    timeout: 600000,
    success: function (data) {
        //  var json = "<h4>Ajax Response</h4><pre>"  + JSON.stringify(data, null, 4) + "</pre>";
        // $('#feedback').html(json);
        console.log("SUCCESS: ", data);
        //$("#btn-search").prop("disabled", false);

        for (var i = 0; i < data.length; i++) {
            //$("#feedback").append('<tr><td>' + data[i].accountNumber + '</td><td>' + data[i].category + '</td><td>' + data[i].ssn + '</td></tr>');
            $('#feedback').append('<tr><td>' + data[i].accountNumber + '</td><td>' + data[i].category + '</td><td>' + data[i].ssn + '</td><td>' + data[i].ssn + '</td><td>' + data[i].ssn + '</td></tr>');

    error: function (e) {
        var json = "<h4>Ajax Response</h4><pre>" + e.responseText + "</pre>";

        console.log("ERROR: ", e);
        $("#btn-search").prop("disabled", false);

How to retrieve the current version of a MySQL database management system (DBMS)?

For UBUNTU you can try the following command to check mysql version :

mysql --version

Posting JSON data via jQuery to ASP .NET MVC 4 controller action

//simple json object in mvc

var model = {"Id": "xx", "Name":"Ravi"};
$.ajax({    url: 'test/[ControllerName]',
                        type: "POST",
                        data: model,
                        success: function (res) {
                            if (res != null) {
                        error: function (res) {


//model in c#
public class MyModel
 public string Id {get; set;}
 public string Name {get; set;}

//controller in mvc

public ActionResult test(MyModel model)
 //now data in your model 

Use table name in MySQL SELECT "AS"

SELECT field1, field2, 'Test' AS field3 FROM Test; // replace with simple quote '

PHP, get file name without file extension

Almost all the above solution have the shown getting filename from variable $path

Below snippet will get the current executed file name without extension

echo pathinfo(basename($_SERVER['SCRIPT_NAME']), PATHINFO_FILENAME);


$_SERVER['SCRIPT_NAME'] contains the path of the current script.

How to use LDFLAGS in makefile

Seems like the order of the linking flags was not an issue in older versions of gcc. Eg gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16) comes with Centos-6.7 happy with linker option before inputfile; but gcc with ubuntu 16.04 gcc (Ubuntu 5.3.1-14ubuntu2.1) 5.3.1 20160413 does not allow.

Its not the gcc version alone, I has got something to with the distros


Left Join and Left Outer Join are one and the same. The former is the shorthand for the latter. The same can be said about the Right Join and Right Outer Join relationship. The demonstration will illustrate the equality. Working examples of each query have been provided via SQL Fiddle. This tool will allow for hands on manipulation of the query.


enter image description here

Left Join and Left Outer Join

enter image description here


enter image description here

Right Join and Right Outer Join

enter image description here


enter image description here

.htaccess rewrite to redirect root URL to subdirectory

you just add this code into your .htaccess file

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteRule ^index\.php$ - [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /folder/index.php [L]

How can I implement rate limiting with Apache? (requests per second)

Depends on why you want to rate limit.

If it's to protect against overloading the server, it actually makes sense to put NGINX in front of it, and configure rate limiting there. It makes sense because NGINX uses much less resources, something like a few MB per ten thousand connections. So, if the server is flooded, NGINX will do the rate limiting(using an insignificant amount of resources) and only pass the allowed traffic to Apache.

If all you're after is simplicity, then use something like mod_evasive.

As usual, if it's to protect against DDoS or DoS attacks, use a service like Cloudflare which also has rate limiting.

Create Map in Java

Java 9

public static void main(String[] args) {
    Map<Integer,String> map = Map.ofEntries(entry(1,"A"), entry(2,"B"), entry(3,"C"));

Ansible: get current target host's IP address

If you want the external public IP and you're in a cloud environment like AWS or Azure, you can use the ipify_facts module:

# TODO: SECURITY: This requires that we trust ipify to provide the correct public IP. We could run our own ipify server.
- name: Get my public IP from

This will place the public IP into the variable ipify_public_ip.

How to securely save username/password (local)?

DPAPI is just for this purpose. Use DPAPI to encrypt the password the first time the user enters is, store it in a secure location (User's registry, User's application data directory, are some choices). Whenever the app is launched, check the location to see if your key exists, if it does use DPAPI to decrypt it and allow access, otherwise deny it.

Class has no member named

Most of the time, the problem is due to some error on the human side. In my case, I was using some classes whose names are similar. I have added the empty() method under one class; however, my code was calling the empty() method from another class. At that moment, the mind was stuck. I was running make clean, and remake thinking that it was some older version of the header got used. After walking away for a moment, I found that problem right away. We programmers tends to blame others first. Maybe we should insist on ourselves to be wrong first.

Sometimes, I forget to write the latest update to disk and looking at the correct version of the code, but the compiler is seeing the wrong version of the code. This situation may be less a issue on IDE (I use vi to do coding).

Javascript | Set all values of an array

The other answers are Ok, but a while loop seems more appropriate:

function setAll(array, value) {
  var i = array.length;
  while (i--) {
    array[i] = value;

A more creative version:

function replaceAll(array, value) {
  var re = new RegExp(value, 'g');
  return new Array(++array.length).toString().replace(/,/g, value).match(re);

May not work everywhere though. :-)

Passing an integer by reference in Python

Most cases where you would need to pass by reference are where you need to return more than one value back to the caller. A "best practice" is to use multiple return values, which is much easier to do in Python than in languages like Java.

Here's a simple example:

def RectToPolar(x, y):
    r = (x ** 2 + y ** 2) ** 0.5
    theta = math.atan2(y, x)
    return r, theta # return 2 things at once

r, theta = RectToPolar(3, 4) # assign 2 things at once

Restful API service

I know @Martyn does not want full code, but I think this annotation its good for this question:

10 Open Source Android Apps which every Android developer must look into

Foursquared for Android is open-source, and have an interesting code pattern interacting with the foursquare REST API.

How to search for string in an array

Completing remark to Jimmy Pena's accepted answer

As SeanC points out, this must be a 1-D array.

The following example call demonstrates that the IsInArray() function cannot be called only for 1-dim arrays, but also for "flat" 2-dim arrays:

Sub TestIsInArray()
    Const SearchItem As String = "ghi"
    Debug.Print "SearchItem = '" & SearchItem & "'"
    'a) Test 1-dim array
    Dim Arr As Variant
    Arr = Split("abc,def,ghi,jkl", ",")
    Debug.Print "a) 1-dim array " & vbNewLine & "   " & Join(Arr, "|") & " ~~> " & IsInArray(SearchItem, Arr)
        '//quick tool to create a 2-dim 1-based array
        Dim v As Variant, vals As Variant                                       
        v = Array(Array("abc", "def", "dummy", "jkl", 5), _
                  Array("mno", "pqr", "stu", "ghi", "vwx"))
        v = Application.Index(v, 0, 0)  ' create 2-dim array (2 rows, 5 cols)
    'b) Test "flat" 2-dim arrays
    Debug.Print "b) ""flat"" 2-dim arrays "
    Dim i As Long
    For i = LBound(v) To UBound(v)
        'slice "flat" 2-dim arrays of one row each
        vals = Application.Index(v, i, 0)
        'check for findings
        Debug.Print Format(i, "   0"), Join(vals, "|") & " ~~> " & IsInArray(SearchItem, vals)
    Next i
End Sub
Function IsInArray(stringToBeFound As String, Arr As Variant) As Boolean
'Note: needs a "flat" array, not necessarily a 1-dimensioned array
  IsInArray = (UBound(Filter(Arr, stringToBeFound)) > -1)
End Function

Results in VB Editor's immediate window

SearchItem = 'ghi'
a) 1-dim array 
   abc|def|ghi|jkl ~~> Wahr
b) "flat" 2-dim arrays 
   1          abc|def|dummy|jkl|5         False
   2          mno|pqr|stu|ghi|vwx         True

How can I process each letter of text using Javascript?

You can simply iterate it as in an array:

for(var i in txt){

Get first key in a (possibly) associative array?

You can play with your array

$daysArray = array('Monday', 'Tuesday', 'Sunday');
$day = current($transport); // $day = 'Monday';
$day = next($transport);    // $day = 'Tuesday';
$day = current($transport); // $day = 'Tuesday';
$day = prev($transport);    // $day = 'Monday';
$day = end($transport);     // $day = 'Sunday';
$day = current($transport); // $day = 'Sunday';

To get the first element of array you can use current and for last element you can use end


Just for the sake for not getting any more down votes for the answer you can convert you key to value using array_keys and use as shown above.

iOS: Multi-line UILabel in Auto Layout

Use -setPreferredMaxLayoutWidth on the UILabel and autolayout should handle the rest.

[label setPreferredMaxLayoutWidth:200.0];

See the UILabel documentation on preferredMaxLayoutWidth.


Only need to set the height constraint in storyboard to Greater than or equal to, no need to setPreferredMaxLayoutWidth.

What is this property in Spring Boot?

The OSIV Anti-Pattern

Instead of letting the business layer decide how it’s best to fetch all the associations that are needed by the View layer, OSIV (Open Session in View) forces the Persistence Context to stay open so that the View layer can trigger the Proxy initialization, as illustrated by the following diagram.

enter image description here

  • The OpenSessionInViewFilter calls the openSession method of the underlying SessionFactory and obtains a new Session.
  • The Session is bound to the TransactionSynchronizationManager.
  • The OpenSessionInViewFilter calls the doFilter of the javax.servlet.FilterChain object reference and the request is further processed
  • The DispatcherServlet is called, and it routes the HTTP request to the underlying PostController.
  • The PostController calls the PostService to get a list of Post entities.
  • The PostService opens a new transaction, and the HibernateTransactionManager reuses the same Session that was opened by the OpenSessionInViewFilter.
  • The PostDAO fetches the list of Post entities without initializing any lazy association.
  • The PostService commits the underlying transaction, but the Session is not closed because it was opened externally.
  • The DispatcherServlet starts rendering the UI, which, in turn, navigates the lazy associations and triggers their initialization.
  • The OpenSessionInViewFilter can close the Session, and the underlying database connection is released as well.

At first glance, this might not look like a terrible thing to do, but, once you view it from a database perspective, a series of flaws start to become more obvious.

The service layer opens and closes a database transaction, but afterward, there is no explicit transaction going on. For this reason, every additional statement issued from the UI rendering phase is executed in auto-commit mode. Auto-commit puts pressure on the database server because each transaction issues a commit at end, which can trigger a transaction log flush to disk. One optimization would be to mark the Connection as read-only which would allow the database server to avoid writing to the transaction log.

There is no separation of concerns anymore because statements are generated both by the service layer and by the UI rendering process. Writing integration tests that assert the number of statements being generated requires going through all layers (web, service, DAO) while having the application deployed on a web container. Even when using an in-memory database (e.g. HSQLDB) and a lightweight webserver (e.g. Jetty), these integration tests are going to be slower to execute than if layers were separated and the back-end integration tests used the database, while the front-end integration tests were mocking the service layer altogether.

The UI layer is limited to navigating associations which can, in turn, trigger N+1 query problems. Although Hibernate offers @BatchSize for fetching associations in batches, and FetchMode.SUBSELECT to cope with this scenario, the annotations are affecting the default fetch plan, so they get applied to every business use case. For this reason, a data access layer query is much more suitable because it can be tailored to the current use case data fetch requirements.

Last but not least, the database connection is held throughout the UI rendering phase which increases connection lease time and limits the overall transaction throughput due to congestion on the database connection pool. The more the connection is held, the more other concurrent requests are going to wait to get a connection from the pool.

Spring Boot and OSIV

Unfortunately, OSIV (Open Session in View) is enabled by default in Spring Boot, and OSIV is really a bad idea from a performance and scalability perspective.

So, make sure that in the configuration file, you have the following entry:

This will disable OSIV so that you can handle the LazyInitializationException the right way.

Starting with version 2.0, Spring Boot issues a warning when OSIV is enabled by default, so you can discover this problem long before it affects a production system.

Open Google Chrome from VBA/Excel

The answer given by @ray above works perfectly, but make sure you are using the right path to open up the file. If you right click on your icon and click properties, you should see where the actual path is, just copy past that and it should work.


How can I tell gcc not to inline a function?

A portable way to do this is to call the function through a pointer:

void (*foo_ptr)() = foo;

Though this produces different instructions to branch, which may not be your goal. Which brings up a good point: what is your goal here?

How to scroll to the bottom of a RecyclerView? scrollToPosition doesn't work

First time scroll when entering in recycler view first time then use


put in minus for scroll down for scroll up put in positive value);

if the view is very big in height then scrolltoposition particular offset is used for the top of view then you use

int overallXScroldl =chatMessageBinding.rvChat.computeVerticalScrollOffset();
chatMessageBinding.rvChat.smoothScrollBy(0, Math.abs(overallXScroldl));

Sort table rows In Bootstrap

These examples are minified because StackOverflow has a maximum character limit and links to external code are discouraged since links can break.

There are multiple plugins if you look: Bootstrap Sortable, Bootstrap Table or DataTables.

Bootstrap 3 with DataTables Example: Bootstrap Docs & DataTables Docs

$(document).ready(function() {
<link href= rel=stylesheet><link href= rel=stylesheet><div class=container><h1>Bootstrap 3 DataTables</h1><table cellspacing=0 class="table table-bordered table-hover table-striped"id=example width=100%><thead><tr><th>Name<th>Position<th>Office<th>Salary<tbody><tr><td>Tiger Nixon<td>System Architect<td>Edinburgh<td>$320,800<tr><td>Garrett Winters<td>Accountant<td>Tokyo<td>$170,750<tr><td>Ashton Cox<td>Junior Technical Author<td>San Francisco<td>$86,000<tr><td>Cedric Kelly<td>Senior Javascript Developer<td>Edinburgh<td>$433,060<tr><td>Airi Satou<td>Accountant<td>Tokyo<td>$162,700<tr><td>Brielle Williamson<td>Integration Specialist<td>New York<td>$372,000<tr><td>Herrod Chandler<td>Sales Assistant<td>San Francisco<td>$137,500<tr><td>Rhona Davidson<td>Integration Specialist<td>Tokyo<td>$327,900<tr><td>Colleen Hurst<td>Javascript Developer<td>San Francisco<td>$205,500<tr><td>Sonya Frost<td>Software Engineer<td>Edinburgh<td>$103,600<tr><td>Jena Gaines<td>Office Manager<td>London<td>$90,560<tr><td>Quinn Flynn<td>Support Lead<td>Edinburgh<td>$342,000<tr><td>Charde Marshall<td>Regional Director<td>San Francisco<td>$470,600<tr><td>Haley Kennedy<td>Senior Marketing Designer<td>London<td>$313,500<tr><td>Tatyana Fitzpatrick<td>Regional Director<td>London<td>$385,750<tr><td>Michael Silva<td>Marketing Designer<td>London<td>$198,500<tr><td>Paul Byrd<td>Chief Financial Officer (CFO)<td>New York<td>$725,000<tr><td>Gloria Little<td>Systems Administrator<td>New York<td>$237,500<tr><td>Bradley Greer<td>Software Engineer<td>London<td>$132,000<tr><td>Dai Rios<td>Personnel Lead<td>Edinburgh<td>$217,500<tr><td>Jenette Caldwell<td>Development Lead<td>New York<td>$345,000<tr><td>Yuri Berry<td>Chief Marketing Officer (CMO)<td>New York<td>$675,000<tr><td>Caesar Vance<td>Pre-Sales Support<td>New York<td>$106,450<tr><td>Doris Wilder<td>Sales Assistant<td>Sidney<td>$85,600<tr><td>Angelica Ramos<td>Chief Executive Officer (CEO)<td>London<td>$1,200,000<tr><td>Gavin Joyce<td>Developer<td>Edinburgh<td>$92,575<tr><td>Jennifer Chang<td>Regional Director<td>Singapore<td>$357,650<tr><td>Brenden Wagner<td>Software Engineer<td>San Francisco<td>$206,850<tr><td>Fiona Green<td>Chief Operating Officer (COO)<td>San Francisco<td>$850,000<tr><td>Shou Itou<td>Regional Marketing<td>Tokyo<td>$163,000<tr><td>Michelle House<td>Integration Specialist<td>Sidney<td>$95,400<tr><td>Suki Burks<td>Developer<td>London<td>$114,500<tr><td>Prescott Bartlett<td>Technical Author<td>London<td>$145,000<tr><td>Gavin Cortez<td>Team Leader<td>San Francisco<td>$235,500<tr><td>Martena Mccray<td>Post-Sales support<td>Edinburgh<td>$324,050<tr><td>Unity Butler<td>Marketing Designer<td>San Francisco<td>$85,675<tr><td>Howard Hatfield<td>Office Manager<td>San Francisco<td>$164,500<tr><td>Hope Fuentes<td>Secretary<td>San Francisco<td>$109,850<tr><td>Vivian Harrell<td>Financial Controller<td>San Francisco<td>$452,500<tr><td>Timothy Mooney<td>Office Manager<td>London<td>$136,200<tr><td>Jackson Bradshaw<td>Director<td>New York<td>$645,750<tr><td>Olivia Liang<td>Support Engineer<td>Singapore<td>$234,500<tr><td>Bruno Nash<td>Software Engineer<td>London<td>$163,500<tr><td>Sakura Yamamoto<td>Support Engineer<td>Tokyo<td>$139,575<tr><td>Thor Walton<td>Developer<td>New York<td>$98,540<tr><td>Finn Camacho<td>Support Engineer<td>San Francisco<td>$87,500<tr><td>Serge Baldwin<td>Data Coordinator<td>Singapore<td>$138,575<tr><td>Zenaida Frank<td>Software Engineer<td>New York<td>$125,250<tr><td>Zorita Serrano<td>Software Engineer<td>San Francisco<td>$115,000<tr><td>Jennifer Acosta<td>Junior Javascript Developer<td>Edinburgh<td>$75,650<tr><td>Cara Stevens<td>Sales Assistant<td>New York<td>$145,600<tr><td>Hermione Butler<td>Regional Director<td>London<td>$356,250<tr><td>Lael Greer<td>Systems Administrator<td>London<td>$103,500<tr><td>Jonas Alexander<td>Developer<td>San Francisco<td>$86,500<tr><td>Shad Decker<td>Regional Director<td>Edinburgh<td>$183,000<tr><td>Michael Bruce<td>Javascript Developer<td>Singapore<td>$183,000<tr><td>Donna Snider<td>Customer Support<td>New York<td>$112,000</table></div><script src=></script><script src=></script><script src=></script>

Bootstrap 4 with DataTables Example: Bootstrap Docs & DataTables Docs

$(document).ready(function() {
<link href= rel=stylesheet><link href= rel=stylesheet><div class=container><h1>Bootstrap 4 DataTables</h1><table cellspacing=0 class="table table-bordered table-hover table-inverse table-striped"id=example width=100%><thead><tr><th>Name<th>Position<th>Office<th>Age<th>Start date<th>Salary<tfoot><tr><th>Name<th>Position<th>Office<th>Age<th>Start date<th>Salary<tbody><tr><td>Tiger Nixon<td>System Architect<td>Edinburgh<td>61<td>2011/04/25<td>$320,800<tr><td>Garrett Winters<td>Accountant<td>Tokyo<td>63<td>2011/07/25<td>$170,750<tr><td>Ashton Cox<td>Junior Technical Author<td>San Francisco<td>66<td>2009/01/12<td>$86,000<tr><td>Cedric Kelly<td>Senior Javascript Developer<td>Edinburgh<td>22<td>2012/03/29<td>$433,060<tr><td>Airi Satou<td>Accountant<td>Tokyo<td>33<td>2008/11/28<td>$162,700<tr><td>Brielle Williamson<td>Integration Specialist<td>New York<td>61<td>2012/12/02<td>$372,000<tr><td>Herrod Chandler<td>Sales Assistant<td>San Francisco<td>59<td>2012/08/06<td>$137,500<tr><td>Rhona Davidson<td>Integration Specialist<td>Tokyo<td>55<td>2010/10/14<td>$327,900<tr><td>Colleen Hurst<td>Javascript Developer<td>San Francisco<td>39<td>2009/09/15<td>$205,500<tr><td>Sonya Frost<td>Software Engineer<td>Edinburgh<td>23<td>2008/12/13<td>$103,600<tr><td>Jena Gaines<td>Office Manager<td>London<td>30<td>2008/12/19<td>$90,560<tr><td>Quinn Flynn<td>Support Lead<td>Edinburgh<td>22<td>2013/03/03<td>$342,000<tr><td>Charde Marshall<td>Regional Director<td>San Francisco<td>36<td>2008/10/16<td>$470,600<tr><td>Haley Kennedy<td>Senior Marketing Designer<td>London<td>43<td>2012/12/18<td>$313,500<tr><td>Tatyana Fitzpatrick<td>Regional Director<td>London<td>19<td>2010/03/17<td>$385,750<tr><td>Michael Silva<td>Marketing Designer<td>London<td>66<td>2012/11/27<td>$198,500<tr><td>Paul Byrd<td>Chief Financial Officer (CFO)<td>New York<td>64<td>2010/06/09<td>$725,000<tr><td>Gloria Little<td>Systems Administrator<td>New York<td>59<td>2009/04/10<td>$237,500<tr><td>Bradley Greer<td>Software Engineer<td>London<td>41<td>2012/10/13<td>$132,000<tr><td>Dai Rios<td>Personnel Lead<td>Edinburgh<td>35<td>2012/09/26<td>$217,500<tr><td>Jenette Caldwell<td>Development Lead<td>New York<td>30<td>2011/09/03<td>$345,000<tr><td>Yuri Berry<td>Chief Marketing Officer (CMO)<td>New York<td>40<td>2009/06/25<td>$675,000<tr><td>Caesar Vance<td>Pre-Sales Support<td>New York<td>21<td>2011/12/12<td>$106,450<tr><td>Doris Wilder<td>Sales Assistant<td>Sidney<td>23<td>2010/09/20<td>$85,600<tr><td>Angelica Ramos<td>Chief Executive Officer (CEO)<td>London<td>47<td>2009/10/09<td>$1,200,000<tr><td>Gavin Joyce<td>Developer<td>Edinburgh<td>42<td>2010/12/22<td>$92,575<tr><td>Jennifer Chang<td>Regional Director<td>Singapore<td>28<td>2010/11/14<td>$357,650<tr><td>Brenden Wagner<td>Software Engineer<td>San Francisco<td>28<td>2011/06/07<td>$206,850<tr><td>Fiona Green<td>Chief Operating Officer (COO)<td>San Francisco<td>48<td>2010/03/11<td>$850,000<tr><td>Shou Itou<td>Regional Marketing<td>Tokyo<td>20<td>2011/08/14<td>$163,000<tr><td>Michelle House<td>Integration Specialist<td>Sidney<td>37<td>2011/06/02<td>$95,400<tr><td>Suki Burks<td>Developer<td>London<td>53<td>2009/10/22<td>$114,500<tr><td>Prescott Bartlett<td>Technical Author<td>London<td>27<td>2011/05/07<td>$145,000<tr><td>Gavin Cortez<td>Team Leader<td>San Francisco<td>22<td>2008/10/26<td>$235,500<tr><td>Martena Mccray<td>Post-Sales support<td>Edinburgh<td>46<td>2011/03/09<td>$324,050<tr><td>Unity Butler<td>Marketing Designer<td>San Francisco<td>47<td>2009/12/09<td>$85,675<tr><td>Howard Hatfield<td>Office Manager<td>San Francisco<td>51<td>2008/12/16<td>$164,500<tr><td>Hope Fuentes<td>Secretary<td>San Francisco<td>41<td>2010/02/12<td>$109,850<tr><td>Vivian Harrell<td>Financial Controller<td>San Francisco<td>62<td>2009/02/14<td>$452,500<tr><td>Timothy Mooney<td>Office Manager<td>London<td>37<td>2008/12/11<td>$136,200<tr><td>Jackson Bradshaw<td>Director<td>New York<td>65<td>2008/09/26<td>$645,750<tr><td>Olivia Liang<td>Support Engineer<td>Singapore<td>64<td>2011/02/03<td>$234,500<tr><td>Bruno Nash<td>Software Engineer<td>London<td>38<td>2011/05/03<td>$163,500<tr><td>Sakura Yamamoto<td>Support Engineer<td>Tokyo<td>37<td>2009/08/19<td>$139,575<tr><td>Thor Walton<td>Developer<td>New York<td>61<td>2013/08/11<td>$98,540<tr><td>Finn Camacho<td>Support Engineer<td>San Francisco<td>47<td>2009/07/07<td>$87,500<tr><td>Serge Baldwin<td>Data Coordinator<td>Singapore<td>64<td>2012/04/09<td>$138,575<tr><td>Zenaida Frank<td>Software Engineer<td>New York<td>63<td>2010/01/04<td>$125,250<tr><td>Zorita Serrano<td>Software Engineer<td>San Francisco<td>56<td>2012/06/01<td>$115,000<tr><td>Jennifer Acosta<td>Junior Javascript Developer<td>Edinburgh<td>43<td>2013/02/01<td>$75,650<tr><td>Cara Stevens<td>Sales Assistant<td>New York<td>46<td>2011/12/06<td>$145,600<tr><td>Hermione Butler<td>Regional Director<td>London<td>47<td>2011/03/21<td>$356,250<tr><td>Lael Greer<td>Systems Administrator<td>London<td>21<td>2009/02/27<td>$103,500<tr><td>Jonas Alexander<td>Developer<td>San Francisco<td>30<td>2010/07/14<td>$86,500<tr><td>Shad Decker<td>Regional Director<td>Edinburgh<td>51<td>2008/11/13<td>$183,000<tr><td>Michael Bruce<td>Javascript Developer<td>Singapore<td>29<td>2011/06/27<td>$183,000<tr><td>Donna Snider<td>Customer Support<td>New York<td>27<td>2011/01/25<td>$112,000</table></div><script src=></script><script src=></script><script src=></script>

Bootstrap 3 with Bootstrap Table Example: Bootstrap Docs & Bootstrap Table Docs

<link href= rel=stylesheet><link href= rel=stylesheet><table data-sort-name=stargazers_count data-sort-order=desc data-toggle=table data-url=""><thead><tr><th data-field=name data-sortable=true>Name<th data-field=stargazers_count data-sortable=true>Stars<th data-field=forks_count data-sortable=true>Forks<th data-field=description data-sortable=true>Description</thead></table><script src=></script><script src=></script>

Bootstrap 3 with Bootstrap Sortable Example: Bootstrap Docs & Bootstrap Sortable Docs

function randomDate(t,e){return new Date(t.getTime()+Math.random()*(e.getTime()-t.getTime()))}function randomName(){return["Jack","Peter","Frank","Steven"][Math.floor(4*Math.random())]+" "+["White","Jackson","Sinatra","Spielberg"][Math.floor(4*Math.random())]}function newTableRow(){var t=moment(randomDate(new Date(2e3,0,1),new Date)).format("D.M.YYYY"),e=Math.round(Math.random()*Math.random()*100*100)/100,a=Math.round(Math.random()*Math.random()*100*100)/100,r=Math.round(Math.random()*Math.random()*100*100)/100;return"<tr><td>"+randomName()+"</td><td>"+e+"</td><td>"+a+"</td><td>"+r+"</td><td>"+Math.round(100*(e+a+r))/100+"</td><td data-dateformat='D-M-YYYY'>"+t+"</td></tr>"}function customSort(){alert("Custom sort.")}!function(t,e){"use strict";"function"==typeof define&&define.amd?define("tinysort",function(){return e}):t.tinysort=e}(this,function(){"use strict";function t(t,e){for(var a,r=t.length,o=r;o--;)e(t[a=r-o-1],a)}function e(t,e,a){for(var o in 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define&&define.amd?define(["jquery","tinysort","moment"],e):e(t.jQuery,t.tinysort,t.moment||void 0)}(this,function(t,e,a){var r,o,n,s=t(document);function d(e){var s=void 0!==a;r=e.sign?e.sign:"arrow","default"==e.customSort&&(e.customSort=c),o=e.customSort||o||c,n=e.emptyEnd,t("table.sortable").each(function(){var r=t(this),o=!0===e.applyLast;r.find("span.sign").remove(),r.find("> thead [colspan]").each(function(){for(var e=parseFloat(t(this).attr("colspan")),a=1;a<e;a++)t(this).after('<th class="colspan-compensate">')}),r.find("> thead [rowspan]").each(function(){for(var e=t(this),a=parseFloat(e.attr("rowspan")),r=1;r<a;r++){var o=e.parent("tr"),"tr"),s=o.children().index(e);n.children().eq(s).before('<th class="rowspan-compensate">')}}),r.find("> thead tr").each(function(e){t(this).find("th").each(function(a){var r=t(this);r.addClass("nosort").removeClass("up down"),r.attr("data-sortcolumn",a),r.attr("data-sortkey",a+"-"+e)})}),r.find("> thead .rowspan-compensate, .colspan-compensate").remove(),r.find("th").each(function(){var e=t(this);if(void 0!==e.attr("data-dateformat")&&s){var o=parseFloat(e.attr("data-sortcolumn"));r.find("td:nth-child("+(o+1)+")").each(function(){var r=t(this);r.attr("data-value",a(r.text(),e.attr("data-dateformat")).format("YYYY/MM/DD/HH/mm/ss"))})}else if(void 0!==e.attr("data-valueprovider")){o=parseFloat(e.attr("data-sortcolumn"));r.find("td:nth-child("+(o+1)+")").each(function(){var a=t(this);a.attr("data-value",new RegExp(e.attr("data-valueprovider")).exec(a.text())[0])})}}),r.find("td").each(function(){var e=t(this);void 0!==e.attr("data-dateformat")&&s?e.attr("data-value",a(e.text(),e.attr("data-dateformat")).format("YYYY/MM/DD/HH/mm/ss")):void 0!==e.attr("data-valueprovider")?e.attr("data-value",new RegExp(e.attr("data-valueprovider")).exec(e.text())[0]):void 0===e.attr("data-value")&&e.attr("data-value",e.text())});var n=l(r),d=n.bsSort;r.find('> thead th[data-defaultsort!="disabled"]').each(function(e){var a=t(this),r=a.closest("table.sortable");"sortTable",r);var s=a.attr("data-sortkey"),i=o?n.lastSort:-1;d[s]=o?d[s]:a.attr("data-defaultsort"),void 0!==d[s]&&o===(s===i)&&(d[s]="asc"===d[s]?"desc":"asc",u(a,r))})})}function i(e){var a=t(e),"sortTable")||a.closest("table.sortable");u(a,r)}function l(e){var"bootstrap-sortable-context");return void 0===a&&(a={bsSort:[],lastSort:void 0},e.find('> thead th[data-defaultsort!="disabled"]').each(function(e){var r=t(this),o=r.attr("data-sortkey");a.bsSort[o]=r.attr("data-defaultsort"),void 0!==a.bsSort[o]&&(a.lastSort=o)}),"bootstrap-sortable-context",a)),a}function c(t,a){e(t,a)}function u(e,a){a.trigger("before-sort");var s=parseFloat(e.attr("data-sortcolumn")),d=l(a),i=d.bsSort;if(e.attr("colspan")){var c=parseFloat("mainsort"))||0,f=parseFloat("sortkey").split("-").pop());if(a.find("> thead tr").length-1>f)return void u(a.find('[data-sortkey="'+(s+c)+"-"+(f+1)+'"]'),a);s+=c}var h=e.attr("data-defaultsign")||r;if(a.find("> thead th").each(function(){t(this).removeClass("up").removeClass("down").addClass("nosort")}),t.browser.mozilla){var p=a.find("> thead div.mozilla");void 0!==p&&(p.find(".sign").remove(),p.parent().html(p.html())),e.wrapInner('<div class="mozilla"></div>'),e.children().eq(0).append('<span class="sign '+h+'"></span>')}else a.find("> thead span.sign").remove(),e.append('<span class="sign '+h+'"></span>');var m=e.attr("data-sortkey"),v="desc"!==e.attr("data-firstsort")?"desc":"asc",b=i[m]||v;d.lastSort!==m&&void 0!==i[m]||(b="asc"===b?"desc":"asc"),i[m]=b,d.lastSort=m,"desc"===i[m]?(e.find("span.sign").addClass("up"),e.addClass("up").removeClass("down nosort")):e.addClass("down").removeClass("up nosort");var g=a.children("tbody").children("tr"),w=[];t(g.filter('[data-disablesort="true"]').get().reverse()).each(function(e,a){var r=t(a);w.push({index:g.index(r),row:r}),r.remove()});var S=g.not('[data-disablesort="true"]');if(0!=S.length){var y="asc"===i[m]&&n;o(S,{emptyEnd:y,selector:"td:nth-child("+(s+1)+")",order:i[m],data:"value"})}t(w.reverse()).each(function(t,e){0===e.index?a.children("tbody").prepend(e.row):a.children("tbody").children("tr").eq(e.index-1).after(e.row)}),a.find("> tbody > tr > td.sorted,> thead th.sorted").removeClass("sorted"),S.find("td:eq("+s+")").addClass("sorted"),e.addClass("sorted"),a.trigger("sorted")}if(t.bootstrapSortable=function(t){null==t?d({}):t.constructor===Boolean?d({applyLast:t}):void 0!==t.sortingHeader?i(t.sortingHeader):d(t)},s.on("click",'table.sortable>thead th[data-defaultsort!="disabled"]',function(t){i(this)}),!t.browser){t.browser={chrome:!1,mozilla:!1,opera:!1,msie:!1,safari:!1};var f=navigator.userAgent;t.each(t.browser,function(e){t.browser[e]=!!new RegExp(e,"i").test(f),t.browser.mozilla&&"mozilla"===e&&(t.browser.mozilla=!!new RegExp("firefox","i").test(f)),"safari"===e&&(t.browser.safari=!1)})}t(t.bootstrapSortable)}),function(){var t=$("table");t.append(newTableRow()),t.append(newTableRow()),$("button.add-row").on("click",function(){var e=$(this);t.append(newTableRow()),"sort")?$.bootstrapSortable(!0):$.bootstrapSortable(!1)}),$("button.change-sort").on("click",function(){$(this).data("custom")?$.bootstrapSortable(!0,void 0,customSort):$.bootstrapSortable(!0,void 0,"default")}),t.on("sorted",function(){alert("Table was sorted.")}),$("#event").on("change",function(){$(this).is(":checked")?t.on("sorted",function(){alert("Table was sorted.")})"sorted")}),$("input[name=sign]:radio").change(function(){$.bootstrapSortable(!0,$(this).val())})}();
table.sortable span.sign { display: block; position: absolute; top: 50%; right: 5px; font-size: 12px; margin-top: -10px; color: #bfbfc1; } table.sortable th:after { display: block; position: absolute; top: 50%; right: 5px; font-size: 12px; margin-top: -10px; color: #bfbfc1; } table.sortable th.arrow:after { content: ''; } table.sortable span.arrow, span.reversed, th.arrow.down:after, th.reversedarrow.down:after, th.arrow.up:after, th.reversedarrow.up:after { border-style: solid; border-width: 5px; font-size: 0; border-color: #ccc transparent transparent transparent; line-height: 0; height: 0; width: 0; margin-top: -2px; } table.sortable span.arrow.up, th.arrow.up:after { border-color: transparent transparent #ccc transparent; margin-top: -7px; } table.sortable span.reversed, th.reversedarrow.down:after { border-color: transparent transparent #ccc transparent; margin-top: -7px; } table.sortable span.reversed.up, th.reversedarrow.up:after { border-color: #ccc transparent transparent transparent; margin-top: -2px; } table.sortable, { content: "a .. z"; } table.sortable, { content: "z .. a"; } table.sortable, th.AZ.nosort:after, th._19.nosort:after, th.month.nosort:after { content: ".."; } table.sortable span.AZ:before, th.AZ.down:after { content: "A .. Z"; } table.sortable span.AZ.up:before, th.AZ.up:after { content: "Z .. A"; } table.sortable span._19:before, th._19.down:after { content: "1 .. 9"; } table.sortable span._19.up:before, th._19.up:after { content: "9 .. 1"; } table.sortable span.month:before, th.month.down:after { content: "jan .. dec"; } table.sortable span.month.up:before, th.month.up:after { content: "dec .. jan"; } table.sortable thead th:not([data-defaultsort=disabled]) { cursor: pointer; position: relative; top: 0; left: 0; } table.sortable thead th:hover:not([data-defaultsort=disabled]) { background: #efefef; } table.sortable thead th div.mozilla { position: relative; }
<link href= rel=stylesheet><link href= rel=stylesheet><div class=container><div class=hero-unit><h1>Bootstrap Sortable</h1></div><table class="sortable table table-bordered table-striped"><thead><tr><th style=width:20%;vertical-align:middle data-defaultsign=nospan class=az data-defaultsort=asc rowspan=2><i class="fa fa-fw fa-map-marker"></i>Name<th style=text-align:center colspan=4 data-mainsort=3>Results<th data-defaultsort=disabled><tr><th style=width:20% colspan=2 data-mainsort=1 data-firstsort=desc>Round 1<th style=width:20%>Round 2<th style=width:20%>Total<t

Hide horizontal scrollbar on an iframe?

This answer is only applicable for websites which use Bootstrap. The responsive embed feature of the Bootstrap takes care of the scrollbars.

<!-- 16:9 aspect ratio -->
<div class="embed-responsive embed-responsive-16by9">
  <iframe class="embed-responsive-item" src=""></iframe>


Execute method on startup in Spring

What we have done was extending org.springframework.web.context.ContextLoaderListener to print something when the context starts.

public class ContextLoaderListener extends org.springframework.web.context.ContextLoaderListener
    private static final Logger logger = LoggerFactory.getLogger( ContextLoaderListener.class );

    public ContextLoaderListener()
    { "Starting application..." );

Configure the subclass then in web.xml:


Get current date in milliseconds

Cconvert NSTimeInterval milisecondedDate value to nsstring and after that convert into int.