Change a HTML5 input's placeholder color with CSS
<input type="text" class="input-control" placeholder="My Input">
Add the following CSS in your head section.
<style type="text/css">
.input-control::placeholder { /* Chrome, Firefox, Opera, Safari 10.1+ */
color: red !important;
opacity: 1; /* Firefox */
}
.input-control:-ms-input-placeholder { /* Internet Explorer 10-11 */
color: red !important;
}
.input-control::-ms-input-placeholder { /* Microsoft Edge */
color: red !important;
}
</style>
The following is the reference link. https://www.w3schools.com/howto/howto_css_placeholder.asp
Clearing my form inputs after submission
Try this:
function submitForm () {
// your code
$('form :input').attr('value', '');
}
When a 'blur' event occurs, how can I find out which element focus went *to*?
keep in mind, that the solution with explicitOriginalTarget does not work for text-input-to-text-input jumps.
try to replace buttons with the following text-inputs and you will see the difference:
<input id="btn1" onblur="showBlur(event)" value="text1">
<input id="btn2" onblur="showBlur(event)" value="text2">
<input id="btn3" onblur="showBlur(event)" value="text3">
datatable jquery - table header width not aligned with body width
CAUSE
Most likely your table is hidden initially which prevents jQuery DataTables from calculating column widths.
SOLUTION
If table is in the collapsible element, you need to adjust headers when collapsible element becomes visible.
For example, for Bootstrap Collapse plugin:
$('#myCollapsible').on('shown.bs.collapse', function () { $($.fn.dataTable.tables(true)).DataTable() .columns.adjust(); });If table is in the tab, you need to adjust headers when tab becomes visible.
For example, for Bootstrap Tab plugin:
$('a[data-toggle="tab"]').on('shown.bs.tab', function(e){ $($.fn.dataTable.tables(true)).DataTable() .columns.adjust(); });
Code above adjusts column widths for all tables on the page. See columns().adjust() API methods for more information.
RESPONSIVE, SCROLLER OR FIXEDCOLUMNS EXTENSIONS
If you're using Responsive, Scroller or FixedColumns extensions, you need to use additional API methods to solve this problem.
If you're using Responsive extension, you need to call
responsive.recalc()API method in addition tocolumns().adjust()API method. See Responsive extension – Incorrect breakpoints example.If you're using Scroller extension, you need to call
scroller.measure()API method instead ofcolumns().adjust()API method. See Scroller extension – Incorrect column widths or missing data example.If you're using FixedColumns extension, you need to call
fixedColumns().relayout()API method in addition tocolumns().adjust()API method. See FixedColumns extension – Incorrect column widths example.
LINKS
See jQuery DataTables – Column width issues with Bootstrap tabs for solutions to the most common problems with columns in jQuery DataTables when table is initially hidden.
how to convert a string date to date format in oracle10g
You can convert a string to a DATE using the TO_DATE function, then reformat the date as another string using TO_CHAR, i.e.:
SELECT TO_CHAR(
TO_DATE('15/August/2009,4:30 PM'
,'DD/Month/YYYY,HH:MI AM')
,'DD-MM-YYYY')
FROM DUAL;
15-08-2009
For example, if your table name is MYTABLE and the varchar2 column is MYDATESTRING:
SELECT TO_CHAR(
TO_DATE(MYDATESTRING
,'DD/Month/YYYY,HH:MI AM')
,'DD-MM-YYYY')
FROM MYTABLE;
What is monkey patching?
Monkey patching is reopening the existing classes or methods in class at runtime and changing the behavior, which should be used cautiously, or you should use it only when you really need to.
As Python is a dynamic programming language, Classes are mutable so you can reopen them and modify or even replace them.
phpmailer error "Could not instantiate mail function"
If you are sending file attachments and your code works for small attachments but fails for large attachments:
If you get the error "Could not instantiate mail function" error when you try to send large emails and your PHP error log contains the message "Cannot send message: Too big" then your mail transfer agent (sendmail, postfix, exim, etc) is refusing to deliver these emails.
The solution is to configure the MTA to allow larger attachments. But this is not always possible. The alternate solution is to use SMTP. You will need access to a SMTP server (and login credentials if your SMTP server requires authentication):
$mail = new PHPMailer();
$mail->IsSMTP(); // telling the class to use SMTP
$mail->SMTPAuth = true; // enable SMTP authentication
$mail->Host = "mail.yourdomain.com"; // set the SMTP server
$mail->Port = 26; // set the SMTP port
$mail->Username = "yourname@yourdomain"; // SMTP account username
$mail->Password = "yourpassword"; // SMTP account password
PHPMailer defaults to using PHP mail() function which uses settings from php.ini which normally defaults to use sendmail (or something similar). In the above example we override the default behavior.
plain count up timer in javascript
Timer for jQuery - smaller, working, tested.
var sec = 0;_x000D_
function pad ( val ) { return val > 9 ? val : "0" + val; }_x000D_
setInterval( function(){_x000D_
$("#seconds").html(pad(++sec%60));_x000D_
$("#minutes").html(pad(parseInt(sec/60,10)));_x000D_
}, 1000);<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<span id="minutes"></span>:<span id="seconds"></span>Pure JavaScript:
var sec = 0;_x000D_
function pad ( val ) { return val > 9 ? val : "0" + val; }_x000D_
setInterval( function(){_x000D_
document.getElementById("seconds").innerHTML=pad(++sec%60);_x000D_
document.getElementById("minutes").innerHTML=pad(parseInt(sec/60,10));_x000D_
}, 1000);<span id="minutes"></span>:<span id="seconds"></span>Update:
This answer shows how to pad.
Stopping setInterval MDN is achieved with clearInterval MDN
var timer = setInterval ( function(){...}, 1000 );
...
clearInterval ( timer );
How to specify a local file within html using the file: scheme?
the "file://" url protocol can only be used to locate files in the file system of the local machine. since this html code is interpreted by a browser, the "local machine" is the machine that is running the browser.
if you are getting file not found errors, i suspect it is because the file is not found. however, it could also be a security limitation of the browser. some browsers will not let you reference a filesystem file from a non-filesystem html page. you could try using the file path from the command line on the machine running the browser to confirm that this is a browser limitation and not a legitimate missing file.
Convert UTF-8 encoded NSData to NSString
You could call this method
+(id)stringWithUTF8String:(const char *)bytes.
How to import NumPy in the Python shell
The message is fairly self-explanatory; your working directory should not be the NumPy source directory when you invoke Python; NumPy should be installed and your working directory should be anything but the directory where it lives.
regular expression to match exactly 5 digits
This should work:
<script type="text/javascript">
var testing='this is d23553 test 32533\n31203 not 333';
var r = new RegExp(/(?:^|[^\d])(\d{5})(?:$|[^\d])/mg);
var matches = [];
while ((match = r.exec(testing))) matches.push(match[1]);
alert('Found: '+matches.join(', '));
</script>
Redirecting to authentication dialog - "An error occurred. Please try again later"
Settings > advanced > security > valid oauth redirect URI
Where do I find the Instagram media ID of a image
If you add ?__a=1 at the end of Instagram public URLs, you get the data of the public URL in JSON.
For the media ID of an image from post URL, simply add the JSON request code at the post URL:
http://instagram.com/p/Y7GF-5vftL/?__a=1
The response will look like this below. You can easily recover the image ID from the "id" parameter in the reply...
{
"graphql": {
"shortcode_media": {
"__typename": "GraphImage",
"id": "448979387270691659",
"shortcode": "Y7GF-5vftL",
"dimensions": {
"height": 612,
"width": 612
},
"gating_info": null,
"fact_check_information": null,
"media_preview": null,
"display_url": "https://scontent-cdt1-1.cdninstagram.com/vp/6d4156d11e92ea1731377ef53324ce28/5E4D451A/t51.2885-15/e15/11324452_400723196800905_116356150_n.jpg?_nc_ht=scontent-cdt1-1.cdninstagram.com&_nc_cat=109",
"display_resources": [
NoClassDefFoundError on Maven dependency
when I try to run it, I get NoClassDefFoundError
Run it how? You're probably trying to run it with eclipse without having correctly imported your maven classpath. See the m2eclipse plugin for integrating maven with eclipse for that.
To verify that your maven config is correct, you could run your app with the exec plugin using:
mvn exec:java -D exec.mainClass=<your main class>
Update: First, regarding your error when running exec:java, your main class is tr.edu.hacettepe.cs.b21127113.bil138_4.App. When talking about class names, they're (almost) always dot-separated. The simple class name is just the last part: App in your case. The fully-qualified name is the full package plus the simple class name, and that's what you give to maven or java when you want to run something. What you were trying to use was a file system path to a source file. That's an entirely different beast. A class name generally translates directly to a class file that's found in the class path, as compared to a source file in the file system. In your specific case, the class file in question would probably be at target/classes/tr/edu/hacettepe/cs/b21127113/bil138_4/App.class because maven compiles to target/classes, and java traditionally creates a directory for each level of packaging.
Your original problem is simply that you haven't put the Jackson jars on your class path. When you run a java program from the command line, you have to set the class path to let it know where it can load classes from. You've added your own jar, but not the other required ones. Your comment makes me think you don't understand how to manually build a class path. In short, the class path can have two things: directories containing class files and jars containing class files. Directories containing jars won't work. For more details on building a class path, see "Setting the class path" and the java and javac tool documentation.
Your class path would need to be at least, and without the line feeds:
target/bil138_4-0.0.1-SNAPSHOT.jar:
/home/utdemir/.m2/repository/org/codehaus/jackson/jackson-core-asl/1.9.6/jackson-core-asl-1.9.6.jar:
/home/utdemir/.m2/repository/org/codehaus/jackson/jackson-mapper-asl/1.9.6/jackson-mapper-asl-1.9.6.jar
Note that the separator on Windows is a semicolon (;).
I apologize for not noticing it sooner. The problem was sitting there in your original post, but I missed it.
js 'types' can only be used in a .ts file - Visual Studio Code using @ts-check
I'm using flow with vscode but had the same problem. I solved it with these steps:
Install the extension Flow Language Support
Disable the built-in TypeScript extension:
- Go to Extensions tab
- Search for @builtin TypeScript and JavaScript Language Features
- Click on Disable
How can I open an Excel file in Python?
There's the openpxyl package:
>>> from openpyxl import load_workbook
>>> wb2 = load_workbook('test.xlsx')
>>> print wb2.get_sheet_names()
['Sheet2', 'New Title', 'Sheet1']
>>> worksheet1 = wb2['Sheet1'] # one way to load a worksheet
>>> worksheet2 = wb2.get_sheet_by_name('Sheet2') # another way to load a worksheet
>>> print(worksheet1['D18'].value)
3
>>> for row in worksheet1.iter_rows():
>>> print row[0].value()
Calling JMX MBean method from a shell script
The Syabru Nagios JMX plugin is meant to be used from Nagios, but doesn't require Nagios and is very convenient for command-line use:
~$ ./check_jmx -U service:jmx:rmi:///jndi/rmi://localhost:1099/JMXConnector --username myuser --password mypass -O java.lang:type=Memory -A HeapMemoryUsage -K used
JMX OK - HeapMemoryUsage.used = 445012360 | 'HeapMemoryUsage used'=445012360;;;;
How can I format the output of a bash command in neat columns
If your output is delimited by tabs a quick solution would be to use the tabs command to adjust the size of your tabs.
tabs 20
keys | awk '{ print $1"\t\t" $2 }'
Resize image proportionally with CSS?
image_tag("/icons/icon.gif", height: '32', width: '32')
I need to set height: '50px', width: '50px' to image tag and this code works from first try note I tried all the above code but no luck so this one works and here is my code from my _nav.html.erb:
<%= image_tag("#{current_user.image}", height: '50px', width: '50px') %>
CSS "and" and "or"
Just in case if any one is stuck like me. After going though the post and some hit and trial this worked for me.
input:not([type="checkbox"])input:not([type="radio"])
How do I change a PictureBox's image?
Assign a new Image object to your PictureBox's Image property. To load an Image from a file, you may use the Image.FromFile method. In your particular case, assuming the current directory is one under bin, this should load the image bin/Pics/image1.jpg, for example:
pictureBox1.Image = Image.FromFile("../Pics/image1.jpg");
Additionally, if these images are static and to be used only as resources in your application, resources would be a much better fit than files.
Line Break in XML formatting?
Take note: I have seen other posts that say 
 will give you a paragraph break, which oddly enough works in the Android xml String.xml file, but will NOT show up in a device when testing (no breaks at all show up). Therefore, the \n shows up on both.
Jquery Ajax, return success/error from mvc.net controller
$.ajax({
type: "POST",
data: formData,
url: "/Forms/GetJobData",
dataType: 'json',
contentType: false,
processData: false,
success: function (response) {
if (response.success) {
alert(response.responseText);
} else {
// DoSomethingElse()
alert(response.responseText);
}
},
error: function (response) {
alert("error!"); //
}
});
Controller:
[HttpPost]
public ActionResult GetJobData(Jobs jobData)
{
var mimeType = jobData.File.ContentType;
var isFileSupported = IsFileSupported(mimeType);
if (!isFileSupported){
// Send "false"
return Json(new { success = false, responseText = "The attached file is not supported." }, JsonRequestBehavior.AllowGet);
}
else
{
// Send "Success"
return Json(new { success = true, responseText= "Your message successfuly sent!"}, JsonRequestBehavior.AllowGet);
}
}
---Supplement:---
basically you can send multiple parameters this way:
Controller:
return Json(new {
success = true,
Name = model.Name,
Phone = model.Phone,
Email = model.Email
},
JsonRequestBehavior.AllowGet);
Html:
<script>
$.ajax({
type: "POST",
url: '@Url.Action("GetData")',
contentType: 'application/json; charset=utf-8',
success: function (response) {
if(response.success){
console.log(response.Name);
console.log(response.Phone);
console.log(response.Email);
}
},
error: function (response) {
alert("error!");
}
});
Android: Scale a Drawable or background image?
There is an easy way to do this from the drawable:
your_drawable.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@color/bg_color"/>
<item>
<bitmap
android:gravity="center|bottom|clip_vertical"
android:src="@drawable/your_image" />
</item>
</layer-list>
The only downside is that if there is not enough space, your image won't be fully shown, but it will be clipped, I couldn't find an way to do this directly from a drawable. But from the tests I did it works pretty well, and it doesn't clip that much of the image. You could play more with the gravity options.
Another way will be to just create an layout, where you will use an ImageView and set the scaleType to fitCenter.
How Long Does it Take to Learn Java for a Complete Newbie?
There are different schools of thought regarding how much time you need to become expert in programming. I'm not going to add to it. I suggest if you have absolutely no programming experience, learn C first. Then move to Java. The following site is very good for learning java. http://www.javapassion.com
How do android screen coordinates work?
This picture will remove everyone's confusion hopefully which is collected from there.
How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
Command
:%s/<Ctrl-V><Ctrl-M>/\r/g
Where <Ctrl-V><Ctrl-M> means type Ctrl+V then Ctrl+M.
Explanation
:%s
substitute, % = all lines
<Ctrl-V><Ctrl-M>
^M characters (the Ctrl-V is a Vim way of writing the Ctrl ^ character and Ctrl-M writes the M after the regular expression, resulting to ^M special character)
/\r/
with new line (\r)
g
And do it globally (not just the first occurrence on the line).
Convert array into csv
I'm using the following function for that; it's an adaptation from one of the man entries in the fputscsv comments. And you'll probably want to flatten that array; not sure what happens if you pass in a multi-dimensional one.
/**
* Formats a line (passed as a fields array) as CSV and returns the CSV as a string.
* Adapted from http://us3.php.net/manual/en/function.fputcsv.php#87120
*/
function arrayToCsv( array &$fields, $delimiter = ';', $enclosure = '"', $encloseAll = false, $nullToMysqlNull = false ) {
$delimiter_esc = preg_quote($delimiter, '/');
$enclosure_esc = preg_quote($enclosure, '/');
$output = array();
foreach ( $fields as $field ) {
if ($field === null && $nullToMysqlNull) {
$output[] = 'NULL';
continue;
}
// Enclose fields containing $delimiter, $enclosure or whitespace
if ( $encloseAll || preg_match( "/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field ) ) {
$output[] = $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure;
}
else {
$output[] = $field;
}
}
return implode( $delimiter, $output );
}
Turn a simple socket into an SSL socket
There are several steps when using OpenSSL. You must have an SSL certificate made which can contain the certificate with the private key be sure to specify the exact location of the certificate (this example has it in the root). There are a lot of good tutorials out there.
Some includes:
#include <openssl/applink.c>
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
You will need to initialize OpenSSL:
void InitializeSSL()
{
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
}
void DestroySSL()
{
ERR_free_strings();
EVP_cleanup();
}
void ShutdownSSL()
{
SSL_shutdown(cSSL);
SSL_free(cSSL);
}
Now for the bulk of the functionality. You may want to add a while loop on connections.
int sockfd, newsockfd;
SSL_CTX *sslctx;
SSL *cSSL;
InitializeSSL();
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd< 0)
{
//Log and Error
return;
}
struct sockaddr_in saiServerAddress;
bzero((char *) &saiServerAddress, sizeof(saiServerAddress));
saiServerAddress.sin_family = AF_INET;
saiServerAddress.sin_addr.s_addr = serv_addr;
saiServerAddress.sin_port = htons(aPortNumber);
bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
listen(sockfd,5);
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
sslctx = SSL_CTX_new( SSLv23_server_method());
SSL_CTX_set_options(sslctx, SSL_OP_SINGLE_DH_USE);
int use_cert = SSL_CTX_use_certificate_file(sslctx, "/serverCertificate.pem" , SSL_FILETYPE_PEM);
int use_prv = SSL_CTX_use_PrivateKey_file(sslctx, "/serverCertificate.pem", SSL_FILETYPE_PEM);
cSSL = SSL_new(sslctx);
SSL_set_fd(cSSL, newsockfd );
//Here is the SSL Accept portion. Now all reads and writes must use SSL
ssl_err = SSL_accept(cSSL);
if(ssl_err <= 0)
{
//Error occurred, log and close down ssl
ShutdownSSL();
}
You are then able read or write using:
SSL_read(cSSL, (char *)charBuffer, nBytesToRead);
SSL_write(cSSL, "Hi :3\n", 6);
Update
The SSL_CTX_new should be called with the TLS method that best fits your needs in order to support the newer versions of security, instead of SSLv23_server_method(). See:
OpenSSL SSL_CTX_new description
TLS_method(), TLS_server_method(), TLS_client_method(). These are the general-purpose version-flexible SSL/TLS methods. The actual protocol version used will be negotiated to the highest version mutually supported by the client and the server. The supported protocols are SSLv3, TLSv1, TLSv1.1, TLSv1.2 and TLSv1.3.
Creating PHP class instance with a string
Lets say ClassOne is defined as:
public class ClassOne
{
protected $arg1;
protected $arg2;
//Contructor
public function __construct($arg1, $arg2)
{
$this->arg1 = $arg1;
$this->arg2 = $arg2;
}
public function echoArgOne
{
echo $this->arg1;
}
}
Using PHP Reflection;
$str = "One";
$className = "Class".$str;
$class = new \ReflectionClass($className);
Create a new Instance:
$instance = $class->newInstanceArgs(["Banana", "Apple")]);
Call a method:
$instance->echoArgOne();
//prints "Banana"
Use a variable as a method:
$method = "echoArgOne";
$instance->$method();
//prints "Banana"
Using Reflection instead of just using the raw string to create an object gives you better control over your object and easier testability (PHPUnit relies heavily on Reflection)
Dark color scheme for Eclipse
The best solution I've found is to leave Eclipse in normal bright mode, and use an OS level screen inverter.
On OS X you can do Command + Option + Ctrl + 8, inverts the whole screen.
On Linux with Compiz, it's even better, you can do Windows + N to darken windows selectively (or Windows + M to do the whole screen).
On Windows, the only decent solution I've found is powerstrip, but it's only free for one year... then it's like $30 or something...
Then you can invert the screen, adjust the syntax-level colours to your liking, and you're off to the races, with cool shades on.
Clearing UIWebview cache
My educated guess is that the memory use you are seeing is not from the page content, but rather from loading UIWebView and all of it's supporting WebKit libraries. I love the UIWebView control, but it is a 'heavy' control that pulls in a very large block of code.
This code is a large sub-set of the iOS Safari browser, and likely initializes a large body of static structures.
Getting last month's date in php
Incorrect answers are:
$lastMonth = date('M Y', strtotime("-1 month"));
$lastDate = date('Y-m', strtotime('last month'));
The reason is if current month is 30+ days but previous month is 29 and less $lastMonth will be the same as current month.
e.g.
If $currentMonth = '30/03/2016';
echo $lastMonth = date('m-Y', strtotime("-1 month")); => 03-2016
echo $lastDate = date('Y-m', strtotime('last month')); => 2016-03
The correct answer will be:
echo date("m-Y", strtotime("first day of previous month")); => 02-2016
echo sprintf("%02d",date("m")-1) . date("-Y"); => 02-2016
echo date("m-Y",mktime(0,0,0,date("m")-1,1,date("Y"))); => 02-2016
Validating email addresses using jQuery and regex
UPDATES
- http://so.lucafilosofi.com/jquery-validate-e-mail-address-regex/
- using new regex
- added support for Address tags (+ sign)
function isValidEmailAddress(emailAddress) {
var pattern = /^([a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+(\.[a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+)*|"((([ \t]*\r\n)?[ \t]+)?([\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*(([ \t]*\r\n)?[ \t]+)?")@(([a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.)+([a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.?$/i;
return pattern.test(emailAddress);
}
if( !isValidEmailAddress( emailaddress ) ) { /* do stuff here */ }
- NOTE: keep in mind that no 100% regex email check exists!
How to use android emulator for testing bluetooth application?
Download Androidx86 from this This is an iso file, so you'd
need something like VMWare or VirtualBox to run it When creating the virtual machine, you need to set the type of guest OS as Linux
instead of Other.
After creating the virtual machine set the network adapter to 'Bridged'. · Start the VM and select 'Live CD VESA' at boot.
Now you need to find out the IP of this VM. Go to terminal in VM (use Alt+F1 & Alt+F7 to toggle) and use the netcfg command to find this.
Now you need open a command prompt and go to your android install folder (on host). This is usually C:\Program Files\Android\android-sdk\platform-tools>.
Type adb connect IP_ADDRESS. There done! Now you need to add Bluetooth. Plug in your USB Bluetooth dongle/Bluetooth device.
In VirtualBox screen, go to Devices>USB devices. Select your dongle.
Done! now your Android VM has Bluetooth. Try powering on Bluetooth and discovering/paring with other devices.
Now all that remains is to go to Eclipse and run your program. The Android AVD manager should show the VM as a device on the list.
Alternatively, Under settings of the virtual machine, Goto serialports -> Port 1 check Enable serial port select a port number then select port mode as disconnected click ok. now, start virtual machine. Under Devices -> USB Devices -> you can find your laptop bluetooth listed. You can simply check the option and start testing the android bluetooth application .
Android Studio marks R in red with error message "cannot resolve symbol R", but build succeeds
Make sure in your AndroidManifest.xml the package name is correct. That fixed the problem for me when my R.whatever was marked red!
I would also recommend checking all your gradle files to make sure those package names are correct. That shouldn't make everything red, but it will stop your gradle files from syncing properly.
Laravel form html with PUT method for PUT routes
You CAN add css clases, and any type of attributes you need to blade template, try this:
{{ Form::open(array('url' => '/', 'method' => 'PUT', 'class'=>'col-md-12')) }}
.... wathever code here
{{ Form::close() }}
If you dont want to go the blade way you can add a hidden input. This is the form Laravel does, any way:
Note: Since HTML forms only support POST and GET, PUT and DELETE methods will be spoofed by automatically adding a _method hidden field to your form. (Laravel docs)
<form class="col-md-12" action="<?php echo URL::to('/');?>/post/<?=$post->postID?>" method="POST">
<!-- Rendered blade HTML form use this hidden. Dont forget to put the form method to POST -->
<input name="_method" type="hidden" value="PUT">
<div class="form-group">
<textarea type="text" class="form-control input-lg" placeholder="Text Here" name="post"><?=$post->post?></textarea>
</div>
<div class="form-group">
<button class="btn btn-primary btn-lg btn-block" type="submit" value="Edit">Edit</button>
</div>
</form>
The name 'ViewBag' does not exist in the current context
You need to add the MVC-specific Razor configuration to your web.config. See here: Razor HtmlHelper Extensions (or other namespaces for views) Not Found
Use the MVC 3 upgrade tool to automatically ensure you have the right config values.
Getting value from table cell in JavaScript...not jQuery
Have you tried innerHTML?
I'd be inclined to use getElementsByTagName() to find the <tr> elements, and then on each to call it again to find the <td> elements. To get the contents, you can either use innerHTML or the appropriate (browser-specific) variation on innerText.
How to pass multiple parameters in a querystring
(Following is the text of the linked section of the Wikipedia entry.)
Structure
A typical URL containing a query string is as follows:
http://server/path/program?query_string
When a server receives a request for such a page, it runs a program (if configured to do so), passing the query_string unchanged to the program. The question mark is used as a separator and is not part of the query string.
A link in a web page may have a URL that contains a query string, however, HTML defines three ways a web browser can generate the query string:
- a web form via the ... element
- a server-side image map via the ?ismap? attribute on the element with a construction
- an indexed search via the now deprecated element
Web forms
The main use of query strings is to contain the content of an HTML form, also known as web form. In particular, when a form containing the fields field1, field2, field3 is submitted, the content of the fields is encoded as a query string as follows:
field1=value1&field2=value2&field3=value3...
- The query string is composed of a series of field-value pairs.
- Within each pair, the field name and value are separated by an equals sign. The equals sign may be omitted if the value is an empty string.
- The series of pairs is separated by the ampersand, '&' (or semicolon, ';' for URLs embedded in HTML and not generated by a ...; see below). While there is no definitive standard, most web frameworks allow multiple values to be associated with a single field:
field1=value1&field1=value2&field1=value3...
For each field of the form, the query string contains a pair field=value. Web forms may include fields that are not visible to the user; these fields are included in the query string when the form is submitted
This convention is a W3C recommendation. W3C recommends that all web servers support semicolon separators in addition to ampersand separators[6] to allow application/x-www-form-urlencoded query strings in URLs within HTML documents without having to entity escape ampersands.
Technically, the form content is only encoded as a query string when the form submission method is GET. The same encoding is used by default when the submission method is POST, but the result is not sent as a query string, that is, is not added to the action URL of the form. Rather, the string is sent as the body of the HTTP request.
How to know a Pod's own IP address from inside a container in the Pod?
The container's IP address should be properly configured inside of its network namespace, so any of the standard linux tools can get it. For example, try ifconfig, ip addr show, hostname -I, etc. from an attached shell within one of your containers to test it out.
Python Image Library fails with message "decoder JPEG not available" - PIL
The followed works on ubuntu 12.04:
pip uninstall PIL
apt-get install libjpeg-dev
apt-get install libfreetype6-dev
apt-get install zlib1g-dev
apt-get install libpng12-dev
pip install PIL --upgrade
when your see "-- JPEG support avaliable" that means it works.
But, if it still doesn't work when your edit your jpeg image, check the python path !!
my python path missed /usr/local/lib/python2.7/dist-packages/PIL-1.1.7-py2.7-linux-x86_64.egg/, so I edit the ~/.bashrc add the following code to this file:
Edit: export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/dist-packages/PIL-1.1.7-py2.7-linux-x86_64.egg/
then, finally, it works!!
JavaScript checking for null vs. undefined and difference between == and ===
The difference is subtle.
In JavaScript an undefined variable is a variable that as never been declared, or never assigned a value. Let's say you declare var a; for instance, then a will be undefined, because it was never assigned any value.
But if you then assign a = null; then a will now be null. In JavaScript null is an object (try typeof null in a JavaScript console if you don't believe me), which means that null is a value (in fact even undefined is a value).
Example:
var a;
typeof a; # => "undefined"
a = null;
typeof null; # => "object"
This can prove useful in function arguments. You may want to have a default value, but consider null to be acceptable. In which case you may do:
function doSomething(first, second, optional) {
if (typeof optional === "undefined") {
optional = "three";
}
// do something
}
If you omit the optional parameter doSomething(1, 2) thenoptional will be the "three" string but if you pass doSomething(1, 2, null) then optional will be null.
As for the equal == and strictly equal === comparators, the first one is weakly type, while strictly equal also checks for the type of values. That means that 0 == "0" will return true; while 0 === "0" will return false, because a number is not a string.
You may use those operators to check between undefined an null. For example:
null === null # => true
undefined === undefined # => true
undefined === null # => false
undefined == null # => true
The last case is interesting, because it allows you to check if a variable is either undefined or null and nothing else:
function test(val) {
return val == null;
}
test(null); # => true
test(undefined); # => true
Work on a remote project with Eclipse via SSH
Try the Remote System Explorer (RSE). It's a set of plug-ins to do exactly what you want.
RSE may already be included in your current Eclipse installation. To check in Eclipse Indigo go to Window > Open Perspective > Other... and choose Remote System Explorer from the Open Perspective dialog to open the RSE perspective.
To create an SSH remote project from the RSE perspective in Eclipse:
- Define a new connection and choose SSH Only from the Select Remote System Type screen in the New Connection dialog.
- Enter the connection information then choose Finish.
- Connect to the new host. (Assumes SSH keys are already setup.)
- Once connected, drill down into the host's Sftp Files, choose a folder and select Create Remote Project from the item's context menu. (Wait as the remote project is created.)
If done correctly, there should now be a new remote project accessible from the Project Explorer and other perspectives within eclipse. With the SSH connection set-up correctly passwords can be made an optional part of the normal SSH authentication process. A remote project with Eclipse via SSH is now created.
How to search if dictionary value contains certain string with Python
For me, this also worked:
def search(myDict, search1):
search.a=[]
for key, value in myDict.items():
if search1 in value:
search.a.append(key)
search(myDict, 'anyName')
print(search.a)
- search.a makes the list a globally available
- if a match of the substring is found in any value, the key of that value will be appended to a
SQL keys, MUL vs PRI vs UNI
UNI: For UNIQUE:
- It is a set of one or more columns of a table to uniquely identify the record.
- A table can have multiple UNIQUE key.
- It is quite like primary key to allow unique values but can accept one null value which primary key does not.
PRI: For PRIMARY:
- It is also a set of one or more columns of a table to uniquely identify the record.
- A table can have only one PRIMARY key.
- It is quite like UNIQUE key to allow unique values but does not allow any null value.
MUL: For MULTIPLE:
- It is also a set of one or more columns of a table which does not identify the record uniquely.
- A table can have more than one MULTIPLE key.
- It can be created in table on index or foreign key adding, it does not allow null value.
- It allows duplicate entries in column.
- If we do not specify MUL column type then it is quite like a normal column but can allow null entries too hence; to restrict such entries we need to specify it.
- If we add indexes on column or add foreign key then automatically MUL key type added.
How to loop over grouped Pandas dataframe?
df.groupby('l_customer_id_i').agg(lambda x: ','.join(x)) does already return a dataframe, so you cannot loop over the groups anymore.
In general:
df.groupby(...)returns aGroupByobject (a DataFrameGroupBy or SeriesGroupBy), and with this, you can iterate through the groups (as explained in the docs here). You can do something like:grouped = df.groupby('A') for name, group in grouped: ...When you apply a function on the groupby, in your example
df.groupby(...).agg(...)(but this can also betransform,apply,mean, ...), you combine the result of applying the function to the different groups together in one dataframe (the apply and combine step of the 'split-apply-combine' paradigm of groupby). So the result of this will always be again a DataFrame (or a Series depending on the applied function).
Java - JPA - @Version annotation
But still I am not sure how it works?
Let's say an entity MyEntity has an annotated version property:
@Entity
public class MyEntity implements Serializable {
@Id
@GeneratedValue
private Long id;
private String name;
@Version
private Long version;
//...
}
On update, the field annotated with @Version will be incremented and added to the WHERE clause, something like this:
UPDATE MYENTITY SET ..., VERSION = VERSION + 1 WHERE ((ID = ?) AND (VERSION = ?))
If the WHERE clause fails to match a record (because the same entity has already been updated by another thread), then the persistence provider will throw an OptimisticLockException.
Does it mean that we should declare our version field as final
No but you could consider making the setter protected as you're not supposed to call it.
Best way to deploy Visual Studio application that can run without installing
It is possible and is deceptively easy:
- "Publish" the application (to, say, some folder on drive C), either from menu Build or from the project's properties ? Publish. This will create an installer for a ClickOnce application.
- But instead of using the produced installer, find the produced files (the EXE file and the .config, .manifest, and .application files, along with any DLL files, etc.) - they are all in the same folder and typically in the
bin\Debugfolder below the project file (.csproj). - Zip that folder (leave out any *.vhost.* files and the
app.publishfolder (they are not needed), and the .pdb files unless you foresee debugging directly on your user's system (for example, by remote control)), and provide it to the users.
An added advantage is that, as a ClickOnce application, it does not require administrative privileges to run (if your application follows the normal guidelines for which folders to use for application data, etc.).
As for .NET, you can check for the minimum required version of .NET being installed (or at all) in the application (most users will already have it installed) and present a dialog with a link to the download page on the Microsoft website (or point to one of your pages that could redirect to the Microsoft page - this makes it more robust if the Microsoft URL change). As it is a small utility, you could target .NET 2.0 to reduce the probability of a user to have to install .NET.
It works. We use this method during development and test to avoid having to constantly uninstall and install the application and still being quite close to how the final application will run.
PHP $_POST not working?
Dump the global variable to find out what you have in the page scope:
var_dump($GLOBALS);
This will tell you the "what" and "where" regarding the data on your page.
Check if a variable is null in plsql
Another way:
var := coalesce (var, 5);
COALESCE is the ANSI equivalent (more or less) of Oracle's NVL function.
Installing SciPy and NumPy using pip
in my case, upgrading pip did the trick. Also, I've installed scipy with -U parameter (upgrade all packages to the last available version)
Function to check if a string is a date
if (strtotime($date)>strtotime(0)) { echo 'it is a date' }
Filtering Pandas Dataframe using OR statement
You can do like below to achieve your result:
import seaborn as sns
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
....
....
#use filter with plot
#or
fg=sns.factorplot('Retailer country', data=df1[(df1['Retailer country']=='United States') | (df1['Retailer country']=='France')], kind='count')
fg.set_xlabels('Retailer country')
plt.show()
#also
#and
fg=sns.factorplot('Retailer country', data=df1[(df1['Retailer country']=='United States') & (df1['Year']=='2013')], kind='count')
fg.set_xlabels('Retailer country')
plt.show()
Redirecting to a new page after successful login
Javascript redirection generated with php code:
if($match > 0){
$msg = 'Login Complete! Thanks';
echo "<script> window.location.assign('index.php'); </script>";
}
else{
$msg = 'Login Failed!<br /> Please make sure that you enter the correct details and that you have activated your account.';
}
Php redirection only:
<?php
header("Location: index.php");
exit;
?>
How can I make a div stick to the top of the screen once it's been scrolled to?
As of January 2017 and the release of Chrome 56, most browsers in common use support the position: sticky property in CSS.
#thing_to_stick {
position: sticky;
top: 0px;
}
does the trick for me in Firefox and Chrome.
In Safari you still need to use position: -webkit-sticky.
Polyfills are available for Internet Explorer and Edge; https://github.com/wilddeer/stickyfill seems to be a good one.
C# Return Different Types?
You can have the return type to be a superclass of the three classes (either defined by you or just use object). Then you can return any one of those objects, but you will need to cast it back to the correct type when getting the result. Like:
public object GetAnything()
{
Hello hello = new Hello();
Computer computer = new Computer();
Radio radio = new Radio();
return radio; or return computer; or return hello //should be possible?!
}
Then:
Hello hello = (Hello)getAnything();
How do I delete NuGet packages that are not referenced by any project in my solution?
I've found a workaround for this.
- Enable package restore and automatic checking (Options / Package Manager / General)
- Delete entire contents of the packages folder (to Recycle Bin if you're nervous!)
- Manage Nuget Packages For Solution
- Click the restore button.
NuGet will restore only the packages used in your solution. You end up with a nice, streamlined set of packages.
SQL - select distinct only on one column
A very typical approach to this type of problem is to use row_number():
select t.*
from (select t.*,
row_number() over (partition by number order by id) as seqnum
from t
) t
where seqnum = 1;
This is more generalizable than using a comparison to the minimum id. For instance, you can get a random row by using order by newid(). You can select 2 rows by using where seqnum <= 2.
How to copy and edit files in Android shell?
The most common answer to that is simple: Bundle few apps (busybox?) with your APK (assuming you want to use it within an application). As far as I know, the /data partition is not mounted noexec, and even if you don't want to deploy a fully-fledged APK, you could modify ConnectBot sources to build an APK with a set of command line tools included.
For command line tools, I recommend using crosstool-ng and building a set of statically-linked tools (linked against uClibc). They might be big, but they'll definitely work.
Where can I get a list of Ansible pre-defined variables?
Argh! From the FAQ:
How do I see a list of all of the ansible_ variables? Ansible by default gathers “facts” about the machines under management, and these facts can be accessed in Playbooks and in templates. To see a list of all of the facts that are available about a machine, you can run the “setup” module as an ad-hoc action:
ansible -m setup hostname
This will print out a dictionary of all of the facts that are available for that particular host.
Here is the output for my vagrant virtual machine called scdev:
scdev | success >> {
"ansible_facts": {
"ansible_all_ipv4_addresses": [
"10.0.2.15",
"192.168.10.10"
],
"ansible_all_ipv6_addresses": [
"fe80::a00:27ff:fe12:9698",
"fe80::a00:27ff:fe74:1330"
],
"ansible_architecture": "i386",
"ansible_bios_date": "12/01/2006",
"ansible_bios_version": "VirtualBox",
"ansible_cmdline": {
"BOOT_IMAGE": "/vmlinuz-3.2.0-23-generic-pae",
"quiet": true,
"ro": true,
"root": "/dev/mapper/precise32-root"
},
"ansible_date_time": {
"date": "2013-09-17",
"day": "17",
"epoch": "1379378304",
"hour": "00",
"iso8601": "2013-09-17T00:38:24Z",
"iso8601_micro": "2013-09-17T00:38:24.425092Z",
"minute": "38",
"month": "09",
"second": "24",
"time": "00:38:24",
"tz": "UTC",
"year": "2013"
},
"ansible_default_ipv4": {
"address": "10.0.2.15",
"alias": "eth0",
"gateway": "10.0.2.2",
"interface": "eth0",
"macaddress": "08:00:27:12:96:98",
"mtu": 1500,
"netmask": "255.255.255.0",
"network": "10.0.2.0",
"type": "ether"
},
"ansible_default_ipv6": {},
"ansible_devices": {
"sda": {
"holders": [],
"host": "SATA controller: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode] (rev 02)",
"model": "VBOX HARDDISK",
"partitions": {
"sda1": {
"sectors": "497664",
"sectorsize": 512,
"size": "243.00 MB",
"start": "2048"
},
"sda2": {
"sectors": "2",
"sectorsize": 512,
"size": "1.00 KB",
"start": "501758"
},
},
"removable": "0",
"rotational": "1",
"scheduler_mode": "cfq",
"sectors": "167772160",
"sectorsize": "512",
"size": "80.00 GB",
"support_discard": "0",
"vendor": "ATA"
},
"sr0": {
"holders": [],
"host": "IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)",
"model": "CD-ROM",
"partitions": {},
"removable": "1",
"rotational": "1",
"scheduler_mode": "cfq",
"sectors": "2097151",
"sectorsize": "512",
"size": "1024.00 MB",
"support_discard": "0",
"vendor": "VBOX"
},
"sr1": {
"holders": [],
"host": "IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)",
"model": "CD-ROM",
"partitions": {},
"removable": "1",
"rotational": "1",
"scheduler_mode": "cfq",
"sectors": "2097151",
"sectorsize": "512",
"size": "1024.00 MB",
"support_discard": "0",
"vendor": "VBOX"
}
},
"ansible_distribution": "Ubuntu",
"ansible_distribution_release": "precise",
"ansible_distribution_version": "12.04",
"ansible_domain": "",
"ansible_eth0": {
"active": true,
"device": "eth0",
"ipv4": {
"address": "10.0.2.15",
"netmask": "255.255.255.0",
"network": "10.0.2.0"
},
"ipv6": [
{
"address": "fe80::a00:27ff:fe12:9698",
"prefix": "64",
"scope": "link"
}
],
"macaddress": "08:00:27:12:96:98",
"module": "e1000",
"mtu": 1500,
"type": "ether"
},
"ansible_eth1": {
"active": true,
"device": "eth1",
"ipv4": {
"address": "192.168.10.10",
"netmask": "255.255.255.0",
"network": "192.168.10.0"
},
"ipv6": [
{
"address": "fe80::a00:27ff:fe74:1330",
"prefix": "64",
"scope": "link"
}
],
"macaddress": "08:00:27:74:13:30",
"module": "e1000",
"mtu": 1500,
"type": "ether"
},
"ansible_form_factor": "Other",
"ansible_fqdn": "scdev",
"ansible_hostname": "scdev",
"ansible_interfaces": [
"lo",
"eth1",
"eth0"
],
"ansible_kernel": "3.2.0-23-generic-pae",
"ansible_lo": {
"active": true,
"device": "lo",
"ipv4": {
"address": "127.0.0.1",
"netmask": "255.0.0.0",
"network": "127.0.0.0"
},
"ipv6": [
{
"address": "::1",
"prefix": "128",
"scope": "host"
}
],
"mtu": 16436,
"type": "loopback"
},
"ansible_lsb": {
"codename": "precise",
"description": "Ubuntu 12.04 LTS",
"id": "Ubuntu",
"major_release": "12",
"release": "12.04"
},
"ansible_machine": "i686",
"ansible_memfree_mb": 23,
"ansible_memtotal_mb": 369,
"ansible_mounts": [
{
"device": "/dev/mapper/precise32-root",
"fstype": "ext4",
"mount": "/",
"options": "rw,errors=remount-ro",
"size_available": 77685088256,
"size_total": 84696281088
},
{
"device": "/dev/sda1",
"fstype": "ext2",
"mount": "/boot",
"options": "rw",
"size_available": 201044992,
"size_total": 238787584
},
{
"device": "/vagrant",
"fstype": "vboxsf",
"mount": "/vagrant",
"options": "uid=1000,gid=1000,rw",
"size_available": 42013151232,
"size_total": 484145360896
}
],
"ansible_os_family": "Debian",
"ansible_pkg_mgr": "apt",
"ansible_processor": [
"Pentium(R) Dual-Core CPU E5300 @ 2.60GHz"
],
"ansible_processor_cores": "NA",
"ansible_processor_count": 1,
"ansible_product_name": "VirtualBox",
"ansible_product_serial": "NA",
"ansible_product_uuid": "NA",
"ansible_product_version": "1.2",
"ansible_python_version": "2.7.3",
"ansible_selinux": false,
"ansible_swapfree_mb": 766,
"ansible_swaptotal_mb": 767,
"ansible_system": "Linux",
"ansible_system_vendor": "innotek GmbH",
"ansible_user_id": "neves",
"ansible_userspace_architecture": "i386",
"ansible_userspace_bits": "32",
"ansible_virtualization_role": "guest",
"ansible_virtualization_type": "virtualbox"
},
"changed": false
}
The current documentation now has a complete chapter listing all Variables and Facts
How to show all shared libraries used by executables in Linux?
On Linux I use:
lsof -P -T -p Application_PID
This works better than ldd when the executable uses a non default loader
How to count the number of lines of a string in javascript
<script type="text/javascript">
var multilinestr = `
line 1
line 2
line 3
line 4
line 5
line 6`;
totallines = multilinestr.split("\n");
lines = str.split("\n");
console.log(lines.length);
</script>
thats works in my case
Get the generated SQL statement from a SqlCommand object?
Profiler is hands-down your best option.
You might need to copy a set of statements from profiler due to the prepare + execute steps involved.
How to print object array in JavaScript?
There is a wonderful print_r implementation for JavaScript in php.js library.
Note, you should also add echo support in the code.
How to get current screen width in CSS?
this can be achieved with the css calc() operator
@media screen and (min-width: 480px) {
body {
background-color: lightgreen;
zoom:calc(100% / 480);
}
}
How to create a readonly textbox in ASP.NET MVC3 Razor
@Html.TextBox("Receivers", Model, new { @class = "form-control", style = "width: 300px", @readonly = "readonly" })
Android Design Support Library expandable Floating Action Button(FAB) menu
Got a better approach to implement the animating FAB menu without using any library or to write huge xml code for animations. hope this will help in future for someone who needs a simple way to implement this.
Just using animate().translationY() function, you can animate any view up or down just I did in my below code, check complete code in github. In case you are looking for the same code in kotlin, you can checkout the kotlin code repo Animating FAB Menu.
first define all your FAB at same place so they overlap each other, remember on top the FAB should be that you want to click and to show other. eg:
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab3"
android:layout_width="@dimen/standard_45"
android:layout_height="@dimen/standard_45"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/standard_21"
app:srcCompat="@android:drawable/ic_btn_speak_now" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab2"
android:layout_width="@dimen/standard_45"
android:layout_height="@dimen/standard_45"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/standard_21"
app:srcCompat="@android:drawable/ic_menu_camera" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab1"
android:layout_width="@dimen/standard_45"
android:layout_height="@dimen/standard_45"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/standard_21"
app:srcCompat="@android:drawable/ic_dialog_map" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
Now in your java class just define all your FAB and perform the click like shown below:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab1 = (FloatingActionButton) findViewById(R.id.fab1);
fab2 = (FloatingActionButton) findViewById(R.id.fab2);
fab3 = (FloatingActionButton) findViewById(R.id.fab3);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(!isFABOpen){
showFABMenu();
}else{
closeFABMenu();
}
}
});
Use the animation().translationY() to animate your FAB,I prefer you to use the attribute of this method in DP since only using an int will effect the display compatibility with higher resolution or lower resolution. as shown below:
private void showFABMenu(){
isFABOpen=true;
fab1.animate().translationY(-getResources().getDimension(R.dimen.standard_55));
fab2.animate().translationY(-getResources().getDimension(R.dimen.standard_105));
fab3.animate().translationY(-getResources().getDimension(R.dimen.standard_155));
}
private void closeFABMenu(){
isFABOpen=false;
fab1.animate().translationY(0);
fab2.animate().translationY(0);
fab3.animate().translationY(0);
}
Now define the above mentioned dimension inside res->values->dimens.xml as shown below:
<dimen name="standard_55">55dp</dimen>
<dimen name="standard_105">105dp</dimen>
<dimen name="standard_155">155dp</dimen>
That's all hope this solution will help the people in future, who are searching for simple solution.
EDITED
If you want to add label over the FAB then simply take a horizontal LinearLayout and put the FAB with textview as label, and animate the layouts if find any issue doing this, you can check my sample code in github, I have handelled all backward compatibility issues in that sample code. check my sample code for FABMenu in Github
to close the FAB on Backpress, override onBackPress() as showen below:
@Override
public void onBackPressed() {
if(!isFABOpen){
this.super.onBackPressed();
}else{
closeFABMenu();
}
}
The Screenshot have the title as well with the FAB,because I take it from my sample app present ingithub
How to Compare two strings using a if in a stored procedure in sql server 2008?
What you want is a SQL case statement. The form of these is either:
select case [expression or column]
when [value] then [result]
when [value2] then [result2]
else [value3] end
or:
select case
when [expression or column] = [value] then [result]
when [expression or column] = [value2] then [result2]
else [value3] end
In your example you are after:
declare @temp as varchar(100)
set @temp='Measure'
select case @temp
when 'Measure' then Measure
else OtherMeasure end
from Measuretable
Read a plain text file with php
$file="./doc.txt";
$doc=file_get_contents($file);
$line=explode("\n",$doc);
foreach($line as $newline){
echo '<h3 style="color:#453288">'.$newline.'</h3><br>';
}
How to convert hex string to Java string?
Try the following code:
public static byte[] decode(String hex){
String[] list=hex.split("(?<=\\G.{2})");
ByteBuffer buffer= ByteBuffer.allocate(list.length);
System.out.println(list.length);
for(String str: list)
buffer.put(Byte.parseByte(str,16));
return buffer.array();
}
To convert to String just create a new String with the byte[] returned by the decode method.
CSS show div background image on top of other contained elements
I would put an absolutely positioned, z-index: 100; span (or spans) with the background: url("myImageWithRoundedCorners.jpg"); set on it inside the #mainWrapperDivWithBGImage .
Compiler error: "class, interface, or enum expected"
You miss the class declaration.
public class DerivativeQuiz{
public static void derivativeQuiz(String args[]){ ... }
}
Singletons vs. Application Context in Android?
They're actually the same. There's one difference I can see. With Application class you can initialize your variables in Application.onCreate() and destroy them in Application.onTerminate(). With singleton you have to rely VM initializing and destroying statics.
How to put two divs side by side
Based on the layout you gave you can use float left property in css.
HTML
<div id="header"> LOGO</div>
<div id="wrap">
<div id="box1"></div>
<div id="box2"></div>
<div id="clear"></div>
</div>
<div id="footer">Footer</div>
CSS
body{
margin:0px;
height: 100%;
}
#header {
background-color: black;
height: 50px;
color: white;
font-size:25px;
}
#wrap {
margin-left:200px;
margin-top:300px;
}
#box1 {
width:200px;
float: left;
height: 300px;
background-color: black;
margin-right: 20px;
}
#box2{
width: 200px;
float: left;
height: 300px;
background-color: blue;
}
#clear {
clear: both;
}
#footer {
width: 100%;
background-color: black;
height: 50px;
margin-top:300px;
color: white;
font-size:25px;
position: absolute;
}
JavaScript alert box with timer
May be it's too late but the following code works fine
document.getElementById('alrt').innerHTML='<b>Please wait, Your download will start soon!!!</b>';
setTimeout(function() {document.getElementById('alrt').innerHTML='';},5000);
<div id='alrt' style="fontWeight = 'bold'"></div>
JPA CriteriaBuilder - How to use "IN" comparison operator
If I understand well, you want to Join ScheduleRequest with User and apply the in clause to the userName property of the entity User.
I'd need to work a bit on this schema. But you can try with this trick, that is much more readable than the code you posted, and avoids the Join part (because it handles the Join logic outside the Criteria Query).
List<String> myList = new ArrayList<String> ();
for (User u : usersList) {
myList.add(u.getUsername());
}
Expression<String> exp = scheduleRequest.get("createdBy");
Predicate predicate = exp.in(myList);
criteria.where(predicate);
In order to write more type-safe code you could also use Metamodel by replacing this line:
Expression<String> exp = scheduleRequest.get("createdBy");
with this:
Expression<String> exp = scheduleRequest.get(ScheduleRequest_.createdBy);
If it works, then you may try to add the Join logic into the Criteria Query. But right now I can't test it, so I prefer to see if somebody else wants to try.
Not a perfect answer though may be code snippets might help.
public <T> List<T> findListWhereInCondition(Class<T> clazz,
String conditionColumnName, Serializable... conditionColumnValues) {
QueryBuilder<T> queryBuilder = new QueryBuilder<T>(clazz);
addWhereInClause(queryBuilder, conditionColumnName,
conditionColumnValues);
queryBuilder.select();
return queryBuilder.getResultList();
}
private <T> void addWhereInClause(QueryBuilder<T> queryBuilder,
String conditionColumnName, Serializable... conditionColumnValues) {
Path<Object> path = queryBuilder.root.get(conditionColumnName);
In<Object> in = queryBuilder.criteriaBuilder.in(path);
for (Serializable conditionColumnValue : conditionColumnValues) {
in.value(conditionColumnValue);
}
queryBuilder.criteriaQuery.where(in);
}
How to use TLS 1.2 in Java 6
Java 6, now support TLS 1.2, check out below
http://www.oracle.com/technetwork/java/javase/overview-156328.html#R160_121
jQuery, get html of a whole element
You can easily get child itself and all of its decedents (children) with Jquery's Clone() method, just
var child = $('#div div:nth-child(1)').clone();
var child2 = $('#div div:nth-child(2)').clone();
You will get this for first query as asked in question
<div id="div1">
<p>Some Content</p>
</div>
What's the difference between [ and [[ in Bash?
In bash, contrary to [, [[ prevents word splitting of variable values.
How do I deserialize a complex JSON object in C# .NET?
First install newtonsoft.json package to Visual Studio using NuGet Package Manager then add the following code:
ClassName ObjectName = JsonConvert.DeserializeObject < ClassName > (jsonObject);
rsync error: failed to set times on "/foo/bar": Operation not permitted
If /foo/bar is on NFS (or possibly some FUSE filesystem), that might be the problem.
Either way, adding -O / --omit-dir-times to your command line will avoid it trying to set modification times on directories.
Change DIV content using ajax, php and jQuery
try this
function getmoviename(id)
{
var p_url= yoururl from where you get movie name,
jQuery.ajax({
type: "GET",
url: p_url,
data: "id=" + id,
success: function(data) {
$('#summary').html(data);
}
});
}
and you html part is
<a href="javascript:void(0);" class="movie" onclick="getmoviename(youridvariable)">
Name of movie</a>
<div id="summary">Here is summary of movie</div>
How can I replace newline or \r\n with <br/>?
nl2br() worked for me, but I needed to wrap the variable with double quotes:
This works:
$description = nl2br("$description");
This doesn't work:
$description = nl2br($description);
PHP: Read Specific Line From File
omg I'm lacking 7 rep to make comments. This is @Raptor's & @Tomm's comment, since this question still shows up way high in google serps.
He's exactly right. For small files file($file); is perfectly fine. For large files it's total overkill b/c php arrays eat memory like crazy.
I just ran a tiny test with a *.csv with a file size of ~67mb (1,000,000 lines):
$t = -microtime(1);
$file = '../data/1000k.csv';
$lines = file($file);
echo $lines[999999]
."\n".(memory_get_peak_usage(1)/1024/1024)
."\n".($t+microtime(1));
//227.5
//0.22701287269592
//Process finished with exit code 0
And since noone mentioned it yet, I gave the SplFileObject a try, which I actually just recently discovered for myself.
$t = -microtime(1);
$file = '../data/1000k.csv';
$spl = new SplFileObject($file);
$spl->seek(999999);
echo $spl->current()
."\n".(memory_get_peak_usage(1)/1024/1024)
."\n".($t+microtime(1));
//0.5
//0.11500692367554
//Process finished with exit code 0
This was on my Win7 desktop so it's not representative for production environment, but still ... quite the difference.
What is the benefit of using "SET XACT_ABORT ON" in a stored procedure?
Regarding client timeouts and the use of XACT_ABORT to handle them, in my opinion there is at least one very good reason to have timeouts in client APIs like SqlClient, and that is to guard the client application code from deadlocks occurring in SQL server code. In this case the client code has no fault, but has to protect it self from blocking forever waiting for the command to complete on the server. So conversely, if client timeouts have to exist to protect client code, so does XACT_ABORT ON has to protect server code from client aborts, in case the server code takes longer to execute than the client is willing to wait for.
How to remove gem from Ruby on Rails application?
If you're using Rails 3+, remove the gem from the Gemfile and run bundle install.
If you're using Rails 2, hopefully you've put the declaration in config/environment.rb. If so, removing it from there and running rake gems:install should do the trick.
Android global variable
// My Class Global Variables Save File Global.Java
public class Global {
public static int myVi;
public static String myVs;
}
// How to used on many Activity
Global.myVi = 12;
Global.myVs = "my number";
........
........
........
int i;
int s;
i = Global.myVi;
s = Global.myVs + " is " + Global.myVi;
Same font except its weight seems different on different browsers
Be sure the font is the same for all browsers. If it is the same font, then the problem has no solution using cross-browser CSS.
Because every browser has its own font rendering engine, they are all different. They can also differ in later versions, or across different OS's.
UPDATE: For those who do not understand the browser and OS font rendering differences, read this and this.
However, the difference is not even noticeable by most people, and users accept that. Forget pixel-perfect cross-browser design, unless you are:
- Trying to turn-off the subpixel rendering by CSS (not all browsers allow that and the text may be ugly...)
- Using images (resources are demanding and hard to maintain)
- Replacing Flash (need some programming and doesn't work on iOS)
UPDATE: I checked the example page. Tuning the kerning by text-rendering should help:
text-rendering: optimizeLegibility;
More references here:
- Part of the font-rendering is controlled by
font-smoothing(as mentioned) and another part istext-rendering. Tuning these properties may help as their default values are not the same across browsers. - For Chrome, if this is still not displaying OK for you, try this text-shadow hack. It should improve your Chrome font rendering, especially in Windows. However, text-shadow will go mad under Windows XP. Be careful.
IIS - can't access page by ip address instead of localhost
The IIS is a multi web site server. The way is distinct the site is by the host header name. So you need to setup that on your web site.
Here is the steps that you need to follow:
How to configure multiple IIS websites to access using host headers?
In general, open your web site properties, locate the Ip Address and near its there is the advanced, "multiple identities for this web site". There you need ether to add all income to this site with a star: "*", ether place the names you like to work with.
How can I use Guzzle to send a POST request in JSON?
I use the following code that works very reliably.
The JSON data is passed in the parameter $request, and the specific request type passed in the variable $searchType.
The code includes a trap to detect and report an unsuccessful or invalid call which will then return false.
If the call is sucessful then json_decode ($result->getBody(), $return=true) returns an array of the results.
public function callAPI($request, $searchType) {
$guzzleClient = new GuzzleHttp\Client(["base_uri" => "https://example.com"]);
try {
$result = $guzzleClient->post( $searchType, ["json" => $request]);
} catch (Exception $e) {
$error = $e->getMessage();
$error .= '<pre>'.print_r($request, $return=true).'</pre>';
$error .= 'No returnable data';
Event::logError(__LINE__, __FILE__, $error);
return false;
}
return json_decode($result->getBody(), $return=true);
}
Private Variables and Methods in Python
Because thats coding convention. See here for more.
Preventing iframe caching in browser
As you said, the issue here is not iframe content caching, but iframe url caching.
As of September 2018, it seems the issue still occurs in Chrome but not in Firefox.
I've tried many things (adding a changing GET parameter, clearing the iframe url in onbeforeunload, detecting a "reload from cache" using a cookie, setting up various response headers) and here are the only two solutions that worked from me:
1- Easy way: create your iframe dynamically from javascript
For example:
const iframe = document.createElement('iframe')
iframe.id = ...
...
iframe.src = myIFrameUrl
document.body.appendChild(iframe)
2- Convoluted way
Server-side, as explained here, disable content caching for the content you serve for the iframe OR for the parent page (either will do).
AND
Set the iframe url from javascript with an additional changing search param, like this:
const url = myIFrameUrl + '?timestamp=' + new Date().getTime()
document.getElementById('my-iframe-id').src = url
(simplified version, beware of other search params)
Get parent of current directory from Python script
import os def parent_directory(): # Create a relative path to the parent # of the current working directory path = os.getcwd() parent = os.path.dirname(path)
relative_parent = os.path.join(path, parent) # Return the absolute path of the parent directory return relative_parentprint(parent_directory())
How to get the row number from a datatable?
You have two options here.
- You can create your own index counter and increment it
- Rather than using a foreach loop, you can use a for loop
The individual row simply represents data, so it will not know what row it is located in.
how to set width for PdfPCell in ItextSharp
aca definis los anchos
float[] anchoDeColumnas= new float[] {10f, 20f, 30f, 10f};
aca se los insertas a la tabla que tiene las columnas
table.setWidths(anchoDeColumnas);
ImportError: No module named 'pygame'
Resolved !
Here is an example
C:\Users\user\AppData\Local\Programs\Python\Python36-32\Scripts>pip install pygame
Calling a class method raises a TypeError in Python
You can instantiate the class by declaring a variable and calling the class as if it were a function:
x = mystuff()
print x.average(9,18,27)
However, this won't work with the code you gave us. When you call a class method on a given object (x), it always passes a pointer to the object as the first parameter when it calls the function. So if you run your code right now, you'll see this error message:
TypeError: average() takes exactly 3 arguments (4 given)
To fix this, you'll need to modify the definition of the average method to take four parameters. The first parameter is an object reference, and the remaining 3 parameters would be for the 3 numbers.
Bootstrap 4: Multilevel Dropdown Inside Navigation
Updated 2018
Here is another variation on the Bootstrap 4.1 Navbar with multi-level dropdown. This one uses minimal CSS for the submenu, and can be re-positioned as desired:
https://www.codeply.com/go/nG6iMAmI2X
.dropdown-submenu {
position: relative;
}
.dropdown-submenu .dropdown-menu {
top: 0;
left: 100%;
margin-top: -1px;
}
jQuery to control display of submenus:
$('.dropdown-submenu > a').on("click", function(e) {
var submenu = $(this);
$('.dropdown-submenu .dropdown-menu').removeClass('show');
submenu.next('.dropdown-menu').addClass('show');
e.stopPropagation();
});
$('.dropdown').on("hidden.bs.dropdown", function() {
// hide any open menus when parent closes
$('.dropdown-menu.show').removeClass('show');
});
See this answer for activating the Bootstrap 4 submenus on hover
Characters allowed in GET parameter
From RFC 1738 on which characters are allowed in URLs:
Only alphanumerics, the special characters "$-_.+!*'(),", and reserved characters used for their reserved purposes may be used unencoded within a URL.
The reserved characters are ";", "/", "?", ":", "@", "=" and "&", which means you would need to URL encode them if you wish to use them.
How to reverse apply a stash?
You can follow the image i shared to unstash if u accidentally tapped stashing.
Easiest way to mask characters in HTML(5) text input
Basic validation can be performed by choosing the type attribute of input elements. For example:
<input type="email" /> <input type="URL" /> <input type="number" />using pattern attribute like:
<input type="text" pattern="[1-4]{5}" />required attribute
<input type="text" required />maxlength:
<input type="text" maxlength="20" />min & max:
<input type="number" min="1" max="4" />
how to remove the bold from a headline?
<h1><span style="font-weight:bold;">THIS IS</span> A HEADLINE</h1>
But be sure that h1 is marked with
font-weight:normal;
You can also set the style with a id or class attribute.
Loop in react-native
renderItem(item)
{
const width = '80%';
var items = [];
for(let i = 0; i < item.count; i++){
items.push( <View style={{ padding: 10, borderBottomColor: "#f2f2f2", borderBottomWidth: 10, flexDirection: 'row' }}>
<View style={{ width }}>
<Text style={styles.name}>{item.title}</Text>
<Text style={{ color: '#818181', paddingVertical: 10 }}>{item.taskDataElements[0].description + " "}</Text>
<Text style={styles.begin}>BEGIN</Text>
</View>
<Text style={{ backgroundColor: '#fcefec', padding: 10, color: 'red', height: 40 }}>{this.msToTime(item.minTatTimestamp) <= 0 ? "NOW" : this.msToTime(item.minTatTimestamp) + "hrs"}</Text>
</View> )
}
return items;
}
render() {
return (this.renderItem(this.props.item))
}
angular.min.js.map not found, what is it exactly?
Monkey is right, according to the link given by monkey
Basically it's a way to map a combined/minified file back to an unbuilt state. When you build for production, along with minifying and combining your JavaScript files, you generate a source map which holds information about your original files. When you query a certain line and column number in your generated JavaScript you can do a lookup in the source map which returns the original location.
I am not sure if it is angular's fault that no map files were generated. But you can turn off source map files by unchecking this option in chrome console setting
Writing your own square root function
In general the square root of an integer (like 2, for example) can only be approximated (not because of problems with floating point arithmetic, but because they're irrational numbers which can't be calculated exactly).
Of course, some approximations are better than others. I mean, of course, that the value 1.732 is a better approximation to the square root of 3, than 1.7
The method used by the code at that link you gave works by taking a first approximation and using it to calculate a better approximation.
This is called Newton's Method, and you can repeat the calculation with each new approximation until it's accurate enough for you.
In fact there must be some way to decide when to stop the repetition or it will run forever.
Usually you would stop when the difference between approximations is less than a value you decide.
EDIT: I don't think there can be a simpler implementation than the two you already found.
SQL Server Creating a temp table for this query
DECLARE #MyTempTable TABLE (SiteName varchar(50), BillingMonth varchar(10), Consumption float)
INSERT INTO #MyTempTable (SiteName, BillingMonth, Consumption)
SELECT tblMEP_Sites.Name AS SiteName, convert(varchar(10),BillingMonth ,101) AS BillingMonth, SUM(Consumption) AS Consumption
FROM tblMEP_Projects....... --your joining statements
Here, # - use this to create table inside tempdb
@ - use this to create table as variable.
Cannot uninstall angular-cli
I had the same problem. This doesn't work:
npm uninstall -g angular/cli
npm cache clean
instead use:
npm uninstall -g @ angular/cli
ImageView rounded corners
you can do by XML like this way
<stroke android:width="3dp"
android:color="#ff000000"/>
<padding android:left="1dp"
android:top="1dp"
android:right="1dp"
android:bottom="1dp"/>
<corners android:radius="30px"/>
and pragmatically you can create rounded bitmap and set in ImageView.
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = 12;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
For Universal lazy loader you can use this wat also.
DisplayImageOptions options = new DisplayImageOptions.Builder()
.displayer(new RoundedBitmapDisplayer(25)) // default
.build();
Local Storage vs Cookies
With localStorage, web applications can store data locally within the user's browser. Before HTML5, application data had to be stored in cookies, included in every server request. Large amounts of data can be stored locally, without affecting website performance. Although localStorage is more modern, there are some pros and cons to both techniques.
Cookies
Pros
- Legacy support (it's been around forever)
- Persistent data
- Expiration dates
Cons
- Each domain stores all its cookies in a single string, which can make parsing data difficult
- Data is unencrypted, which becomes an issue because... ... though small in size, cookies are sent with every HTTP request Limited size (4KB)
- SQL injection can be performed from a cookie
Local storage
Pros
- Support by most modern browsers
- Persistent data that is stored directly in the browser
- Same-origin rules apply to local storage data
- Is not sent with every HTTP request
- ~5MB storage per domain (that's 5120KB)
Cons
- Not supported by anything before: IE 8, Firefox 3.5, Safari 4, Chrome 4, Opera 10.5, iOS 2.0, Android 2.0
- If the server needs stored client information you purposely have to send it.
localStorage usage is almost identical with the session one. They have pretty much exact methods, so switching from session to localStorage is really child's play. However, if stored data is really crucial for your application, you will probably use cookies as a backup in case localStorage is not available. If you want to check browser support for localStorage, all you have to do is run this simple script:
/*
* function body that test if storage is available
* returns true if localStorage is available and false if it's not
*/
function lsTest(){
var test = 'test';
try {
localStorage.setItem(test, test);
localStorage.removeItem(test);
return true;
} catch(e) {
return false;
}
}
/*
* execute Test and run our custom script
*/
if(lsTest()) {
// window.sessionStorage.setItem(name, 1); // session and storage methods are very similar
window.localStorage.setItem(name, 1);
console.log('localStorage where used'); // log
} else {
document.cookie="name=1; expires=Mon, 28 Mar 2016 12:00:00 UTC";
console.log('Cookie where used'); // log
}
"localStorage values on Secure (SSL) pages are isolated" as someone noticed keep in mind that localStorage will not be available if you switch from 'http' to 'https' secured protocol, where the cookie will still be accesible. This is kind of important to be aware of if you work with secure protocols.
SVN change username
Go to Tortoise SVN --> Settings --> Saved Data.
There is an option to clear Authentication Data, click on the clear button, and it will allow you to select which connection you wanted to clear userid/pwd for.
After you do this, any checkout or update activity, it will reprompt for the userid and password.
sys.argv[1], IndexError: list index out of range
I've done some research and it seems that the sys.argv might require an argument at the command line when running the script
Not might, but definitely requires. That's the whole point of sys.argv, it contains the command line arguments. Like any python array, accesing non-existent element raises IndexError.
Although the code uses try/except to trap some errors, the offending statement occurs in the first line.
So the script needs a directory name, and you can test if there is one by looking at len(sys.argv) and comparing to 1+number_of_requirements. The argv always contains the script name plus any user supplied parameters, usually space delimited but the user can override the space-split through quoting. If the user does not supply the argument, your choices are supplying a default, prompting the user, or printing an exit error message.
To print an error and exit when the argument is missing, add this line before the first use of sys.argv:
if len(sys.argv)<2:
print "Fatal: You forgot to include the directory name on the command line."
print "Usage: python %s <directoryname>" % sys.argv[0]
sys.exit(1)
sys.argv[0] always contains the script name, and user inputs are placed in subsequent slots 1, 2, ...
see also:
Get selected option from select element
The first part is to get the element from the drop down menu which may look like this:
<select id="cycles_list"> <option value="10">10</option> <option value="100">100</option> <option value="1000">1000</option> <option value="10000">10000</option> </select>
To capture via jQuery you can do something like so:
$('#cycles_list').change(function() { var mylist = document.getElementById("cycles_list"); iterations = mylist.options[mylist.selectedIndex].text; });
Once you have stored the value in your variable, the next step would be to send the information stored in the variable to the form field or HTML element of your choosing. It may be a div p or custom element.
i.e.
<p></p> OR <div></div>
You would use:
$('p').html(iterations); OR $('div').html(iterations);
If you wish to populate a text field such as:
<input type="text" name="textform" id="textform"></input>
You would use:
$('#textform').text = iterations;
Of course you can do all of the above in less steps, I just believe it helps people to learn when you break it all down into easy to understand steps... Hope this helps!
Is there a git-merge --dry-run option?
As noted previously, pass in the --no-commit flag, but to avoid a fast-forward commit, also pass in --no-ff, like so:
$ git merge --no-commit --no-ff $BRANCH
To examine the staged changes:
$ git diff --cached
And you can undo the merge, even if it is a fast-forward merge:
$ git merge --abort
How to display images from a folder using php - PHP
You have two ways to do that:
METHOD 1. The secure way.
Put the images on /www/htdocs/
<?php
$www_root = 'http://localhost/images';
$dir = '/var/www/images';
$file_display = array('jpg', 'jpeg', 'png', 'gif');
if ( file_exists( $dir ) == false ) {
echo 'Directory \'', $dir, '\' not found!';
} else {
$dir_contents = scandir( $dir );
foreach ( $dir_contents as $file ) {
$file_type = strtolower( end( explode('.', $file ) ) );
if ( ($file !== '.') && ($file !== '..') && (in_array( $file_type, $file_display)) ) {
echo '<img src="', $www_root, '/', $file, '" alt="', $file, '"/>';
break;
}
}
}
?>
METHOD 2. Unsecure but more flexible.
Put the images on any directory (apache must have permission to read the file).
<?php
$dir = '/home/user/Pictures';
$file_display = array('jpg', 'jpeg', 'png', 'gif');
if ( file_exists( $dir ) == false ) {
echo 'Directory \'', $dir, '\' not found!';
} else {
$dir_contents = scandir( $dir );
foreach ( $dir_contents as $file ) {
$file_type = strtolower( end( explode('.', $file ) ) );
if ( ($file !== '.') && ($file !== '..') && (in_array( $file_type, $file_display)) ) {
echo '<img src="file_viewer.php?file=', base64_encode($dir . '/' . $file), '" alt="', $file, '"/>';
break;
}
}
}
?>
And create another script to read the image file.
<?php
$filename = base64_decode($_GET['file']);
// Check the folder location to avoid exploit
if (dirname($filename) == '/home/user/Pictures')
echo file_get_contents($filename);
?>
Changing a specific column name in pandas DataFrame
Since inplace argument is available, you don't need to copy and assign the original data frame back to itself, but do as follows:
df.rename(columns={'two':'new_name'}, inplace=True)
Vertically centering a div inside another div
I have been using the following solution since over a year, it works with IE 7 and 8 as well.
<style>
.outer {
font-size: 0;
width: 400px;
height: 400px;
background: orange;
text-align: center;
display: inline-block;
}
.outer .emptyDiv {
height: 100%;
background: orange;
visibility: collapse;
}
.outer .inner {
padding: 10px;
background: red;
font: bold 12px Arial;
}
.verticalCenter {
display: inline-block;
*display: inline;
zoom: 1;
vertical-align: middle;
}
</style>
<div class="outer">
<div class="emptyDiv verticalCenter"></div>
<div class="inner verticalCenter">
<p>Line 1</p>
<p>Line 2</p>
</div>
</div>
'node' is not recognized as an internal or an external command, operable program or batch file while using phonegap/cordova
If you install Node using the windows installer, there is nothing you have to do. It adds path to node and npm.
You can also use Windows setx command for changing system environment variables. No reboot is required. Just logout/login. Or just open a new cmd window, if you want to see the changing there.
setx PATH "%PATH%;C:\Program Files\nodejs"
Get the second largest number in a list in linear time
You could use the heapq module:
>>> el = [20,67,3,2.6,7,74,2.8,90.8,52.8,4,3,2,5,7]
>>> import heapq
>>> heapq.nlargest(2, el)
[90.8, 74]
And go from there...
Message "Async callback was not invoked within the 5000 ms timeout specified by jest.setTimeout"
The timeout problem occurs when either the network is slow or many network calls are made using await. These scenarios exceed the default timeout, i.e., 5000 ms. To avoid the timeout error, simply increase the timeout of globals that support a timeout. A list of globals and their signature can be found here.
For Jest 24.9
How can I get all a form's values that would be submitted without submitting
Thanks Chris. That's what I was looking for. However, note that the method is serialize(). And there is another method serializeArray() that looks very useful that I may use. Thanks for pointing me in the right direction.
var queryString = $('#frmAdvancedSearch').serialize();
alert(queryString);
var fieldValuePairs = $('#frmAdvancedSearch').serializeArray();
$.each(fieldValuePairs, function(index, fieldValuePair) {
alert("Item " + index + " is [" + fieldValuePair.name + "," + fieldValuePair.value + "]");
});
Difference between javacore, thread dump and heap dump in Websphere
A thread dump is a dump of the stacks of all live threads. Thus useful for analysing what an app is up to at some point in time, and if done at intervals handy in diagnosing some kinds of 'execution' problems (e.g. thread deadlock).
A heap dump is a dump of the state of the Java heap memory. Thus useful for analysing what use of memory an app is making at some point in time so handy in diagnosing some memory issues, and if done at intervals handy in diagnosing memory leaks.
This is what they are in 'raw' terms, and could be provided in many ways. In general used to describe dumped files from JVMs and app servers, and in this form they are a low level tool. Useful if for some reason you can't get anything else, but you will find life easier using decent profiling tool to get similar but easier to dissect info.
With respect to WebSphere a javacore file is a thread dump, albeit with a lot of other info such as locks and loaded classes and some limited memory usage info, and a PHD file is a heap dump.
If you want to read a javacore file you can do so by hand, but there is an IBM tool (BM Thread and Monitor Dump Analyzer) which makes it simpler. If you want to read a heap dump file you need one of many IBM tools: MDD4J or Heap Analyzer.
$(form).ajaxSubmit is not a function
Try ajaxsubmit library. It does ajax submition as well as validation via ajax.
Also configuration is very flexible to support any kind of UI.
Live demo available with js, css and html examples.
Getting index value on razor foreach
All of the above answers require logic in the view. Views should be dumb and contain as little logic as possible. Why not create properties in your view model that correspond to position in the list eg:
public int Position {get; set}
In your view model builder you set the position 1 through 4.
BUT .. there is even a cleaner way. Why not make the CSS class a property of your view model? So instead of the switch statement in your partial, you would just do this:
<div class="@Model.GridCSS">
Move the switch statement to your view model builder and populate the CSS class there.
Using std::max_element on a vector<double>
As others have said, std::max_element() and std::min_element() return iterators, which need to be dereferenced to obtain the value.
The advantage of returning an iterator (rather than just the value) is that it allows you to determine the position of the (first) element in the container with the maximum (or minimum) value.
For example (using C++11 for brevity):
#include <vector>
#include <algorithm>
#include <iostream>
int main()
{
std::vector<double> v {1.0, 2.0, 3.0, 4.0, 5.0, 1.0, 2.0, 3.0, 4.0, 5.0};
auto biggest = std::max_element(std::begin(v), std::end(v));
std::cout << "Max element is " << *biggest
<< " at position " << std::distance(std::begin(v), biggest) << std::endl;
auto smallest = std::min_element(std::begin(v), std::end(v));
std::cout << "min element is " << *smallest
<< " at position " << std::distance(std::begin(v), smallest) << std::endl;
}
This yields:
Max element is 5 at position 4
min element is 1 at position 0
Note:
Using std::minmax_element() as suggested in the comments above may be faster for large data sets, but may give slightly different results. The values for my example above would be the same, but the position of the "max" element would be 9 since...
If several elements are equivalent to the largest element, the iterator to the last such element is returned.
Implicit type conversion rules in C++ operators
The type of the expression, when not both parts are of the same type, will be converted to the biggest of both. The problem here is to understand which one is bigger than the other (it does not have anything to do with size in bytes).
In expressions in which a real number and an integer number are involved, the integer will be promoted to real number. For example, in int + float, the type of the expression is float.
The other difference are related to the capability of the type. For example, an expression involving an int and a long int will result of type long int.
How to convert an OrderedDict into a regular dict in python3
Here is what seems simplest and works in python 3.7
from collections import OrderedDict
d = OrderedDict([('method', 'constant'), ('data', '1.225')])
d2 = dict(d) # Now a normal dict
Now to check this:
>>> type(d2)
<class 'dict'>
>>> isinstance(d2, OrderedDict)
False
>>> isinstance(d2, dict)
True
NOTE: This also works, and gives same result -
>>> {**d}
{'method': 'constant', 'data': '1.225'}
>>> {**d} == d2
True
As well as this -
>>> dict(d)
{'method': 'constant', 'data': '1.225'}
>>> dict(d) == {**d}
True
Cheers
Reset the database (purge all), then seed a database
You can use rake db:reset when you want to drop the local database and start fresh with data loaded from db/seeds.rb. This is a useful command when you are still figuring out your schema, and often need to add fields to existing models.
Once the reset command is used it will do the following:
Drop the database: rake db:drop
Load the schema: rake db:schema:load
Seed the data: rake db:seed
But if you want to completely drop your database you can use rake db:drop. Dropping the database will also remove any schema conflicts or bad data. If you want to keep the data you have, be sure to back it up before running this command.
This is a detailed article about the most important rake database commands.
How do I do an initial push to a remote repository with Git?
You have to add at least one file to the repository before committing, e.g. .gitignore.
How to iterate over the file in python
You should learn about EAFP vs LBYL.
from sys import stdin, stdout
def main(infile=stdin, outfile=stdout):
if isinstance(infile, basestring):
infile=open(infile,'r')
if isinstance(outfile, basestring):
outfile=open(outfile,'w')
for lineno, line in enumerate(infile, 1):
line = line.strip()
try:
print >>outfile, int(line,16)
except ValueError:
return "Bad value at line %i: %r" % (lineno, line)
if __name__ == "__main__":
from sys import argv, exit
exit(main(*argv[1:]))
Pipe output and capture exit status in Bash
This solution works without using bash specific features or temporary files. Bonus: in the end the exit status is actually an exit status and not some string in a file.
Situation:
someprog | filter
you want the exit status from someprog and the output from filter.
Here is my solution:
((((someprog; echo $? >&3) | filter >&4) 3>&1) | (read xs; exit $xs)) 4>&1
echo $?
See my answer for the same question on unix.stackexchange.com for a detailed explanation and an alternative without subshells and some caveats.
How can I check if a command exists in a shell script?
A function I have in an install script made for exactly this
function assertInstalled() {
for var in "$@"; do
if ! which $var &> /dev/null; then
echo "Install $var!"
exit 1
fi
done
}
example call:
assertInstalled zsh vim wget python pip git cmake fc-cache
AngularJS - Attribute directive input value change
To watch out the runtime changes in value of a custom directive, use $observe method of attrs object, instead of putting $watch inside a custom directive.
Here is the documentation for the same ... $observe docs
Split a python list into other "sublists" i.e smaller lists
I'd say
chunks = [data[x:x+100] for x in range(0, len(data), 100)]
If you are using python 2.x instead of 3.x, you can be more memory-efficient by using xrange(), changing the above code to:
chunks = [data[x:x+100] for x in xrange(0, len(data), 100)]
Difference between int and double
int is a binary representation of a whole number, double is a double-precision floating point number.
Running Python code in Vim
You can extends for any language with 1 keybinding with augroup command, for example:
augroup rungroup
autocmd!
autocmd BufRead,BufNewFile *.go nnoremap <F5> :exec '!go run' shellescape(@%, 1)<cr>
autocmd BufRead,BufNewFile *.py nnoremap <F5> :exec '!python' shellescape(@%, 1)<cr>
augroup END
How to Find Item in Dictionary Collection?
Sometimes you still need to use FirstOrDefault if you have to do different tests. If the Key component of your dictionnary is nullable, you can do this:
thisTag = _tags.FirstOrDefault(t => t.Key.SubString(1,1) == 'a');
if(thisTag.Key != null) { ... }
Using FirstOrDefault, the returned KeyValuePair's key and value will both be null if no match is found.
generate model using user:references vs user_id:integer
Both will generate the same columns when you run the migration. In rails console, you can see that this is the case:
:001 > Micropost
=> Micropost(id: integer, user_id: integer, created_at: datetime, updated_at: datetime)
The second command adds a belongs_to :user relationship in your Micropost model whereas the first does not. When this relationship is specified, ActiveRecord will assume that the foreign key is kept in the user_id column and it will use a model named User to instantiate the specific user.
The second command also adds an index on the new user_id column.
Facebook Access Token for Pages
See here if you want to grant a Facebook App permanent access to a page (even when you / the app owner are logged out):
http://developers.facebook.com/docs/opengraph/using-app-tokens/
"An App Access Token does not expire unless you refresh the application secret through your app settings."
Why use $_SERVER['PHP_SELF'] instead of ""
When you insert ANY variable into HTML, unless you want the browser to interpret the variable itself as HTML, it's best to use htmlspecialchars() on it. Among other things, it prevents hackers from inserting arbitrary HTML in your page.
The value of $_SERVER['PHP_SELF'] is taken directly from the URL entered in the browser. Therefore if you use it without htmlspecialchars(), you're allowing hackers to directly manipulate the output of your code.
For example, if I e-mail you a link to http://example.com/"><script>malicious_code_here()</script><span class=" and you have <form action="<?php echo $_SERVER['PHP_SELF'] ?>">, the output will be:
<form action="http://example.com/"><script>malicious_code_here()</script><span class="">
My script will run, and you will be none the wiser. If you were logged in, I may have stolen your cookies, or scraped confidential info from your page.
However, if you used <form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']) ?>">, the output would be:
<form action="http://example.com/"><script>cookie_stealing_code()</script><span class="">
When you submitted the form, you'd have a weird URL, but at least my evil script did not run.
On the other hand, if you used <form action="">, then the output would be the same no matter what I added to my link. This is the option I would recommend.
HTML5 video (mp4 and ogv) problems in Safari and Firefox - but Chrome is all good
I see in the documentation page an example like this:
<source src="foo.ogg" type="video/ogg; codecs="dirac, speex"">
Maybe you should enclose the codec information with " entities instead of actual quotes and the type attribute with quotes instead of apostrophes.
You can also try removing the codec info altogether.
Dynamically Add Variable Name Value Pairs to JSON Object
I'm assuming each entry in "ips" can have multiple name value pairs - so it's nested. You can achieve this data structure as such:
var ips = {}
function addIpId(ipID, name, value) {
if (!ips[ipID]) ip[ipID] = {};
var entries = ip[ipID];
// you could add a check to ensure the name-value par's not already defined here
var entries[name] = value;
}
WPF binding to Listbox selectedItem
Inside the DataTemplate you're working in the context of a Rule, that's why you cannot bind to SelectedRule.Name -- there is no such property on a Rule.
To bind to the original data context (which is your ViewModel) you can write:
<TextBlock Text="{Binding ElementName=lbRules, Path=DataContext.SelectedRule.Name}" />
UPDATE: regarding the SelectedItem property binding, it looks perfectly valid, I tried the same on my machine and it works fine. Here is my full test app:
XAML:
<Window x:Class="TestWpfApplication.ListBoxSelectedItem"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ListBoxSelectedItem" Height="300" Width="300"
xmlns:app="clr-namespace:TestWpfApplication">
<Window.DataContext>
<app:ListBoxSelectedItemViewModel/>
</Window.DataContext>
<ListBox ItemsSource="{Binding Path=Rules}" SelectedItem="{Binding Path=SelectedRule, Mode=TwoWay}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Name:" />
<TextBox Text="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Window>
Code behind:
namespace TestWpfApplication
{
/// <summary>
/// Interaction logic for ListBoxSelectedItem.xaml
/// </summary>
public partial class ListBoxSelectedItem : Window
{
public ListBoxSelectedItem()
{
InitializeComponent();
}
}
public class Rule
{
public string Name { get; set; }
}
public class ListBoxSelectedItemViewModel
{
public ListBoxSelectedItemViewModel()
{
Rules = new ObservableCollection<Rule>()
{
new Rule() { Name = "Rule 1"},
new Rule() { Name = "Rule 2"},
new Rule() { Name = "Rule 3"},
};
}
public ObservableCollection<Rule> Rules { get; private set; }
private Rule selectedRule;
public Rule SelectedRule
{
get { return selectedRule; }
set
{
selectedRule = value;
}
}
}
}
Capturing window.onbeforeunload
There seems to be a lot of misinformation about how to use this event going around (even in upvoted answers on this page).
The onbeforeunload event API is supplied by the browser for a specific purpose: The only thing you can do that's worth doing in this method is to return a string which the browser will then prompt to the user to indicate to them that action should be taken before they navigate away from the page. You CANNOT prevent them from navigating away from a page (imagine what a nightmare that would be for the end user).
Because browsers use a confirm prompt to show the user the string you returned from your event listener, you can't do anything else in the method either (like perform an ajax request).
In an application I wrote, I want to prompt the user to let them know they have unsaved changes before they leave the page. The browser prompts them with the message and, after that, it's out of my hands, the user can choose to stay or leave, but you no longer have control of the application at that point.
An example of how I use it (pseudo code):
onbeforeunload = function() {
if(Application.hasUnsavedChanges()) {
return 'You have unsaved changes. Please save them before leaving this page';
}
};
If (and only if) the application has unsaved changes, then the browser prompts the user to either ignore my message (and leave the page anyway) or to not leave the page. If they choose to leave the page anyway, too bad, there's nothing you can do (nor should be able to do) about it.
Get a list of dates between two dates
You can use MySQL's user variables like this:
SET @num = -1;
SELECT DATE_ADD( '2009-01-01', interval @num := @num+1 day) AS date_sequence,
your_table.* FROM your_table
WHERE your_table.other_column IS NOT NULL
HAVING DATE_ADD('2009-01-01', interval @num day) <= '2009-01-13'
@num is -1 because you add to it the first time you use it. Also, you can't use "HAVING date_sequence" because that makes the user variable increment twice for each row.
Center image in div horizontally
A very simple and elegant solution to this is provided by W3C. Simply use the margin:0 auto declaration as follows:
.top_image img { margin:0 auto; }
More information and examples from W3C.
Checking for the correct number of arguments
You can check the total number of arguments which are passed in command line with "$#"
Say for Example my shell script name is hello.sh
sh hello.sh hello-world
# I am passing hello-world as argument in command line which will b considered as 1 argument
if [ $# -eq 1 ]
then
echo $1
else
echo "invalid argument please pass only one argument "
fi
Output will be hello-world
Importing large sql file to MySql via command line
Guys regarding time taken for importing huge files most importantly it takes more time is because default setting of mysql is "autocommit = true", you must set that off before importing your file and then check how import works like a gem...
First open MySQL:
mysql -u root -p
Then, You just need to do following :
mysql>use your_db
mysql>SET autocommit=0 ; source the_sql_file.sql ; COMMIT ;
Similarity String Comparison in Java
Sounds like a plagiarism finder to me if your string turns into a document. Maybe searching with that term will turn up something good.
"Programming Collective Intelligence" has a chapter on determining whether two documents are similar. The code is in Python, but it's clean and easy to port.
PLS-00428: an INTO clause is expected in this SELECT statement
In PLSQL block, columns of select statements must be assigned to variables, which is not the case in SQL statements.
The second BEGIN's SQL statement doesn't have INTO clause and that caused the error.
DECLARE
PROD_ROW_ID VARCHAR (10) := NULL;
VIS_ROW_ID NUMBER;
DSC VARCHAR (512);
BEGIN
SELECT ROW_ID
INTO VIS_ROW_ID
FROM SIEBEL.S_PROD_INT
WHERE PART_NUM = 'S0146404';
BEGIN
SELECT RTRIM (VIS.SERIAL_NUM)
|| ','
|| RTRIM (PLANID.DESC_TEXT)
|| ','
|| CASE
WHEN PLANID.HIGH = 'TEST123'
THEN
CASE
WHEN TO_DATE (PROD.START_DATE) + 30 > SYSDATE
THEN
'Y'
ELSE
'N'
END
ELSE
'N'
END
|| ','
|| 'GB'
|| ','
|| RTRIM (TO_CHAR (PROD.START_DATE, 'YYYY-MM-DD'))
INTO DSC
FROM SIEBEL.S_LST_OF_VAL PLANID
INNER JOIN SIEBEL.S_PROD_INT PROD
ON PROD.PART_NUM = PLANID.VAL
INNER JOIN SIEBEL.S_ASSET NETFLIX
ON PROD.PROD_ID = PROD.ROW_ID
INNER JOIN SIEBEL.S_ASSET VIS
ON VIS.PROM_INTEG_ID = PROD.PROM_INTEG_ID
INNER JOIN SIEBEL.S_PROD_INT VISPROD
ON VIS.PROD_ID = VISPROD.ROW_ID
WHERE PLANID.TYPE = 'Test Plan'
AND PLANID.ACTIVE_FLG = 'Y'
AND VISPROD.PART_NUM = VIS_ROW_ID
AND PROD.STATUS_CD = 'Active'
AND VIS.SERIAL_NUM IS NOT NULL;
END;
END;
/
References
http://docs.oracle.com/cd/E11882_01/appdev.112/e25519/static.htm#LNPLS00601 http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/selectinto_statement.htm#CJAJAAIG http://pls-00428.ora-code.com/
No WebApplicationContext found: no ContextLoaderListener registered?
And if you would like to use an existing context, rather than a new context which would be loaded from xml configuration by org.springframework.web.context.ContextLoaderListener, then see -> https://stackoverflow.com/a/40694787/3004747
How to select a range of the second row to the last row
Sub SelectAllCellsInSheet(SheetName As String)
lastCol = Sheets(SheetName).Range("a1").End(xlToRight).Column
Lastrow = Sheets(SheetName).Cells(1, 1).End(xlDown).Row
Sheets(SheetName).Range("A2", Sheets(SheetName).Cells(Lastrow, lastCol)).Select
End Sub
To use with ActiveSheet:
Call SelectAllCellsInSheet(ActiveSheet.Name)
Select Tag Helper in ASP.NET Core MVC
You can also use IHtmlHelper.GetEnumSelectList.
// Summary:
// Returns a select list for the given TEnum.
//
// Type parameters:
// TEnum:
// Type to generate a select list for.
//
// Returns:
// An System.Collections.Generic.IEnumerable`1 containing the select list for the
// given TEnum.
//
// Exceptions:
// T:System.ArgumentException:
// Thrown if TEnum is not an System.Enum or if it has a System.FlagsAttribute.
IEnumerable<SelectListItem> GetEnumSelectList<TEnum>() where TEnum : struct;
Nodejs send file in response
Here's an example program that will send myfile.mp3 by streaming it from disk (that is, it doesn't read the whole file into memory before sending the file). The server listens on port 2000.
[Update] As mentioned by @Aftershock in the comments, util.pump is gone and was replaced with a method on the Stream prototype called pipe; the code below reflects this.
var http = require('http'),
fileSystem = require('fs'),
path = require('path');
http.createServer(function(request, response) {
var filePath = path.join(__dirname, 'myfile.mp3');
var stat = fileSystem.statSync(filePath);
response.writeHead(200, {
'Content-Type': 'audio/mpeg',
'Content-Length': stat.size
});
var readStream = fileSystem.createReadStream(filePath);
// We replaced all the event handlers with a simple call to readStream.pipe()
readStream.pipe(response);
})
.listen(2000);
Taken from http://elegantcode.com/2011/04/06/taking-baby-steps-with-node-js-pumping-data-between-streams/
How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
Switch to joda-time and you can do this in three lines
DateTime jodaTime = new DateTime();
DateTimeFormatter formatter = DateTimeFormat.forPattern("YYYY-MM-dd HH:mm:ss.SSS");
System.out.println("jodaTime = " + formatter.print(jodaTime));
You also have direct access to the individual fields of the date without using a Calendar.
System.out.println("year = " + jodaTime.getYear());
System.out.println("month = " + jodaTime.getMonthOfYear());
System.out.println("day = " + jodaTime.getDayOfMonth());
System.out.println("hour = " + jodaTime.getHourOfDay());
System.out.println("minute = " + jodaTime.getMinuteOfHour());
System.out.println("second = " + jodaTime.getSecondOfMinute());
System.out.println("millis = " + jodaTime.getMillisOfSecond());
Output is as follows:
jodaTime = 2010-04-16 18:09:26.060
year = 2010
month = 4
day = 16
hour = 18
minute = 9
second = 26
millis = 60
According to http://www.joda.org/joda-time/
Joda-Time is the de facto standard date and time library for Java. From Java SE 8 onwards, users are asked to migrate to java.time (JSR-310).
How do I copy a folder from remote to local using scp?
To copy all from Local Location to Remote Location (Upload)
scp -r /path/from/destination username@hostname:/path/to/destination
To copy all from Remote Location to Local Location (Download)
scp -r username@hostname:/path/from/destination /path/to/destination
Custom Port where xxxx is custom port number
scp -r -P xxxx username@hostname:/path/from/destination /path/to/destination
Copy on current directory from Remote to Local
scp -r username@hostname:/path/from/file .
Help:
-rRecursively copy all directories and files- Always use full location from
/, Get full location bypwd scpwill replace all existing fileshostnamewill be hostname or IP address- if custom port is needed (besides port 22) use
-P portnumber - . (dot) - it means current working directory, So download/copy from server and paste here only.
Note: Sometimes the custom port will not work due to the port not being allowed in the firewall, so make sure that custom port is allowed in the firewall for incoming and outgoing connection
How to round each item in a list of floats to 2 decimal places?
mylist = [0.30000000000000004, 0.5, 0.20000000000000001]
myRoundedList = [round(x,2) for x in mylist]
# [0.3, 0.5, 0.2]
Failed to resolve: com.google.android.gms:play-services in IntelliJ Idea with gradle
this is probably about you don't entered correct dependency version. you can select correct dependency from this:
file>menu>project structure>app>dependencies>+>Library Dependency>select any thing you need > OK
if cannot find your needs you should update your sdk from below way:
tools>android>sdk manager>sdk update>select any thing you need>ok
How to declare local variables in postgresql?
Postgresql historically doesn't support procedural code at the command level - only within functions. However, in Postgresql 9, support has been added to execute an inline code block that effectively supports something like this, although the syntax is perhaps a bit odd, and there are many restrictions compared to what you can do with SQL Server. Notably, the inline code block can't return a result set, so can't be used for what you outline above.
In general, if you want to write some procedural code and have it return a result, you need to put it inside a function. For example:
CREATE OR REPLACE FUNCTION somefuncname() RETURNS int LANGUAGE plpgsql AS $$
DECLARE
one int;
two int;
BEGIN
one := 1;
two := 2;
RETURN one + two;
END
$$;
SELECT somefuncname();
The PostgreSQL wire protocol doesn't, as far as I know, allow for things like a command returning multiple result sets. So you can't simply map T-SQL batches or stored procedures to PostgreSQL functions.
What's the difference between .NET Core, .NET Framework, and Xamarin?
This is how Microsoft explains it:
.NET Framework is the "full" or "traditional" flavor of .NET that's distributed with Windows. Use this when you are building a desktop Windows or UWP app, or working with older ASP.NET 4.6+.
.NET Core is cross-platform .NET that runs on Windows, Mac, and Linux. Use this when you want to build console or web apps that can run on any platform, including inside Docker containers. This does not include UWP/desktop apps currently.
Xamarin is used for building mobile apps that can run on iOS, Android, or Windows Phone devices.
Xamarin usually runs on top of Mono, which is a version of .NET that was built for cross-platform support before Microsoft decided to officially go cross-platform with .NET Core. Like Xamarin, the Unity platform also runs on top of Mono.
A common point of confusion is where ASP.NET Core fits in. ASP.NET Core can run on top of either .NET Framework (Windows) or .NET Core (cross-platform), as detailed in this answer: Difference between ASP.NET Core (.NET Core) and ASP.NET Core (.NET Framework)
Convert tabs to spaces in Notepad++
The following way is the best way in my opinion:
Download:
- Notepad++
- The plugin http://sourceforge.net/projects/tabstospacesnpp/?source=typ
- Read the instructions and it will convert tabs to spaces.
How to use Spring Boot with MySQL database and JPA?
When moving classes into specific packages like repository, controller, domain just the generic @SpringBootApplication is not enough.
You will have to specify the base package for component scan
@ComponentScan("base_package")
For JPA
@EnableJpaRepositories(basePackages = "repository")
is also needed, so spring data will know where to look into for repository interfaces.
List to array conversion to use ravel() function
If all you want is calling ravel on your (nested, I s'pose?) list, you can do that directly, numpy will do the casting for you:
L = [[1,None,3],["The", "quick", object]]
np.ravel(L)
# array([1, None, 3, 'The', 'quick', <class 'object'>], dtype=object)
Also worth mentioning that you needn't go through numpy at all.
Compare two folders which has many files inside contents
diff -r will do this, telling you both if any files have been added or deleted, and what's changed in the files that have been modified.
PHP Fatal error: Call to undefined function json_decode()
CENTOS
Scene
I installed PHP in Centos Docker, this is my DockerFile:
FROM centos:7.6.1810
LABEL maintainer="[email protected]"
RUN yum install httpd-2.4.6-88.el7.centos -y
RUN rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
RUN rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
RUN yum install php72w -y
ENTRYPOINT ["/usr/sbin/httpd", "-D", "FOREGROUND"]
The app returned the same error with json_decode and json_encode
Resolution
Install PHP Common that has json_encode and json_decode
yum install -y php72w-common-7.2.14-1.w7.x86_64
How to find the resolution?
I have another Docker File what build the container for the API and it has the order to install php-mysql client:
yum install php72w-mysql.x86_64 -y
If i use these image to mount the app, the json_encode and json_decode works!! Ok..... What dependencies does this have?
[root@c023b46b720c etc]# yum install php72w-mysql.x86_64
Loaded plugins: fastestmirror, ovl
Loading mirror speeds from cached hostfile
* base: mirror.gtdinternet.com
* epel: mirror.globo.com
* extras: linorg.usp.br
* updates: mirror.gtdinternet.com
* webtatic: us-east.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package php72w-mysql.x86_64 0:7.2.14-1.w7 will be installed
--> Processing Dependency: php72w-pdo(x86-64) for package: php72w-mysql-7.2.14-1.w7.x86_64
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: php72w-mysql-7.2.14-1.w7.x86_64
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: php72w-mysql-7.2.14-1.w7.x86_64
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.60-1.el7_5 will be installed
---> Package php72w-pdo.x86_64 0:7.2.14-1.w7 will be installed
--> Processing Dependency: php72w-common(x86-64) = 7.2.14-1.w7 for package: php72w-pdo-7.2.14-1.w7.x86_64
--> Running transaction check
---> Package php72w-common.x86_64 0:7.2.14-1.w7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
========================================================================================================
Package Arch Version Repository Size
========================================================================================================
Installing:
php72w-mysql x86_64 7.2.14-1.w7 webtatic 82 k
Installing for dependencies:
mariadb-libs x86_64 1:5.5.60-1.el7_5 base 758 k
php72w-common x86_64 7.2.14-1.w7 webtatic 1.3 M
php72w-pdo x86_64 7.2.14-1.w7 webtatic 89 k
Transaction Summary
========================================================================================================
Install 1 Package (+3 Dependent packages)
Total download size: 2.2 M
Installed size: 17 M
Is this ok [y/d/N]: y
Downloading packages:
(1/4): mariadb-libs-5.5.60-1.el7_5.x86_64.rpm | 758 kB 00:00:00
(2/4): php72w-mysql-7.2.14-1.w7.x86_64.rpm | 82 kB 00:00:01
(3/4): php72w-pdo-7.2.14-1.w7.x86_64.rpm | 89 kB 00:00:01
(4/4): php72w-common-7.2.14-1.w7.x86_64.rpm | 1.3 MB 00:00:06
--------------------------------------------------------------------------------------------------------
Total 336 kB/s | 2.2 MB 00:00:06
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : 1:mariadb-libs-5.5.60-1.el7_5.x86_64 1/4
Installing : php72w-common-7.2.14-1.w7.x86_64 2/4
Installing : php72w-pdo-7.2.14-1.w7.x86_64 3/4
Installing : php72w-mysql-7.2.14-1.w7.x86_64 4/4
Verifying : php72w-common-7.2.14-1.w7.x86_64 1/4
Verifying : 1:mariadb-libs-5.5.60-1.el7_5.x86_64 2/4
Verifying : php72w-pdo-7.2.14-1.w7.x86_64 3/4
Verifying : php72w-mysql-7.2.14-1.w7.x86_64 4/4
Installed:
php72w-mysql.x86_64 0:7.2.14-1.w7
Dependency Installed:
mariadb-libs.x86_64 1:5.5.60-1.el7_5 php72w-common.x86_64 0:7.2.14-1.w7
php72w-pdo.x86_64 0:7.2.14-1.w7
Complete!
Yes! Inside the dependences is the common packages. I Installed it into my other container and it works! After, i put de directive into DockerFile, Git commit!! Git Tag!!!! Git Push!!!! Ready!
HTML5 Canvas: Zooming
IIRC Canvas is a raster style bitmap. it wont be zoomable because there's no stored information to zoom to.
Your best bet is to keep two copies in memory (zoomed and non) and swap them on mouse click.
How to use onClick event on react Link component?
You are passing hello() as a string, also hello() means execute hello immediately.
try
onClick={hello}
Static variable inside of a function in C
Let's just read the Wikipedia article on Static Variables...
Static local variables: variables declared as static inside a function are statically allocated while having the same scope as automatic local variables. Hence whatever values the function puts into its static local variables during one call will still be present when the function is called again.
How to compare oldValues and newValues on React Hooks useEffect?
Incase anybody is looking for a TypeScript version of usePrevious:
In a .tsx module:
import { useEffect, useRef } from "react";
const usePrevious = <T extends unknown>(value: T): T | undefined => {
const ref = useRef<T>();
useEffect(() => {
ref.current = value;
});
return ref.current;
};
Or in a .ts module:
import { useEffect, useRef } from "react";
const usePrevious = <T>(value: T): T | undefined => {
const ref = useRef<T>();
useEffect(() => {
ref.current = value;
});
return ref.current;
};
CSS Transition doesn't work with top, bottom, left, right
I ran into this issue today. Here is my hacky solution.
I needed a fixed position element to transition up by 100 pixels as it loaded.
var delay = (ms) => new Promise(res => setTimeout(res, ms));
async function animateView(startPosition,elm){
for(var i=0; i<101; i++){
elm.style.top = `${(startPosition-i)}px`;
await delay(1);
}
}
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
You seem to be including one C file from anther.
#includeshould normally be used with header files only.Within the definition of
struct ast_nodeyou refer tostruct AST_NODE, which doesn't exist. C is case-sensitive.
What's the C# equivalent to the With statement in VB?
The closest thing in C# 3.0, is that you can use a constructor to initialize properties:
Stuff.Elements.Foo foo = new Stuff.Elements.Foo() {Name = "Bob Dylan", Age = 68, Location = "On Tour", IsCool = true}
How to generate a create table script for an existing table in phpmyadmin?
One more way. Select the target table in the left panel in phpMyAdmin, click on Export tab, unselect Data block and click on Go button.
How can I give the Intellij compiler more heap space?
Since IntelliJ 2016, the location is File | Settings | Build, Execution, Deployment | Compiler | Build process heap size.
brew install mysql on macOS
Try by giving Grant permission Command of mysql
CMAKE_MAKE_PROGRAM not found
I tried to use CMake to build GammaRay for Qt on Windows with mingw. So, I had the Qt installed. And I had the same problem as other users here.
The approach that worked for me is launching cmake-gui from Qt build prompt (a shortcut created by Qt installer in "Start Menu\All programs\Qt{QT_VERSION}" folder).
SQL Server - Adding a string to a text column (concat equivalent)
hmm, try doing CAST(' ' AS TEXT) + [myText]
Although, i am not completely sure how this will pan out.
I also suggest against using the Text datatype, use varchar instead.
If that doesn't work, try ' ' + CAST ([myText] AS VARCHAR(255))
Inline CSS styles in React: how to implement a:hover?
Checkout Typestyle if you are using React with Typescript.
Below is a sample code for :hover
import {style} from "typestyle";
/** convert a style object to a CSS class name */
const niceColors = style({
transition: 'color .2s',
color: 'blue',
$nest: {
'&:hover': {
color: 'red'
}
}
});
<h1 className={niceColors}>Hello world</h1>
Push method in React Hooks (useState)?
setTheArray([...theArray, newElement]); is the simplest answer but be careful for the mutation of items in theArray. Use deep cloning of array items.
Select Specific Columns from Spark DataFrame
If you want to split you dataframe into two different ones, do two selects on it with the different columns you want.
val sourceDf = spark.read.csv(...)
val df1 = sourceDF.select("first column", "second column", "third column")
val df2 = sourceDF.select("first column", "second column", "third column")
Note that this of course means that the sourceDf would be evaluated twice, so if it can fit into distributed memory and you use most of the columns across both dataframes it might be a good idea to cache it. It it has many extra columns that you don't need, then you can do a select on it first to select on the columns you will need so it would store all that extra data in memory.
Java path..Error of jvm.cfg
update registry path to installation location
This happened for me when I moved out my default installation from an overcrowded primary partition to another location. Fir
Display current time in 12 hour format with AM/PM
SimpleDateFormat formatDate = new SimpleDateFormat("hh:mm:ss a");
h is used for AM/PM times (1-12).
H is used for 24 hour times (1-24).
a is the AM/PM marker
m is minute in hour
Note: Two h's will print a leading zero: 01:13 PM. One h will print without the leading zero: 1:13 PM.
Looks like basically everyone beat me to it already, but I digress
ps command doesn't work in docker container
If you're running a CentOS container, you can install ps using this command:
yum install -y procps
Running this command on Dockerfile:
RUN yum install -y procps
Specifying an Index (Non-Unique Key) Using JPA
A unique hand-picked collection of Index annotations
= Specifications =
JPA 2.1+:
javax.persistence.Index(or see JSR-000338 PDF, p. 452, item 11.1.23)
The JPA@Indexannotation can only be used as part of another annotation like@Table,@SecondaryTable, etc.:@Table(indexes = { @Index(...) })
= ORM Frameworks =
- ? Hibernate ORM:
org.hibernate.annotations.Index; - OpenJPA:
org.apache.openjpa.persistence.jdbc.Indexandorg.apache.openjpa.persistence.jdbc.ElementIndex(see Reference Guide); - EclipseLink:
org.eclipse.persistence.annotations.Index; - DataNucleus:
org.datanucleus.api.jpa.annotations.Index; - Carbonado (GitHub):
com.amazon.carbonado.Index; - EBean: com.avaje.ebean.annotation.Index or io.ebean.annotation.Index ?
- Ujorm: Annotation
org.ujorm.orm.annot.Column,indexanduniqueIndexproperties; - requery (GitHub. Java, Kotlin, Android): Annotation
io.requery.Index; Exposed (Kotlin SQL Library): org.jetbrains.exposed.sql.Index, org.jetbrains.exposed.sql.Table#index(). Example:
object Persons : IdTable() { val code = varchar("code", 50).index() }
= ORM for Android =
- ? ActiveAndroid: Annotation
com.activeandroid.annotation.Columnhasindex,indexGroups,unique, anduniqueGroupsproperties;
UPDATE [2018]: ActiveAndroid was a nice ORM 4 years ago, but unfortunately, the author of the library stopped maintaining it, so someone forked, fixed bugs, and rebranded it as ReActiveAndroid - use this if you're starting a new project or refer to Migration Guide if you want to replace ActiveAndroid in a legacy project. - ReActiveAndroid: Annotation
com.reactiveandroid.annotation.Columnhasindex,indexGroups,unique, anduniqueGroupsproperties; - ORMLite: Annotation
com.j256.ormlite.field.DatabaseFieldhas anindexproperty; - greenDAO:
org.greenrobot.greendao.annotation.Index; - ORMAN (GitHub):
org.orman.mapper.annotation.Index; - ? DBFlow (GitHub):
com.raizlabs.android.dbflow.sql.index.Index(example of usage); - other (lots of ORM libraries at the Android Arsenal).
= Other (difficult to categorize) =
- Realm - Alternative DB for iOS / Android: Annotation
io.realm.annotations.Index; - Empire-db - a lightweight yet powerful relational DB abstraction layer based on JDBC. It has no schema definition through annotations;
- Kotlin NoSQL (GitHub) - a reactive and type-safe DSL for working with NoSQL databases (PoC): ???
- Slick - Reactive Functional Relational Mapping for Scala. It has no schema definition through annotations.
Just go for one of them.
Get URL of ASP.Net Page in code-behind
Use this:
Request.Url.AbsoluteUriThat will get you the full path (including http://...)
How to dismiss a Twitter Bootstrap popover by clicking outside?
This approach ensures that you can close a popover by clicking anywhere on the page. If you click on another clickable entity, it hides all other popovers. The animation:false is required else you will get a jquery .remove error in your console.
$('.clickable').popover({
trigger: 'manual',
animation: false
}).click (evt) ->
$('.clickable').popover('hide')
evt.stopPropagation()
$(this).popover('show')
$('html').on 'click', (evt) ->
$('.clickable').popover('hide')
How to increase size of DOSBox window?
go to dosbox installation directory (on my machine that is C:\Program Files (x86)\DOSBox-0.74 ) as you see the version number is part of the installation directory name.
run "DOSBox 0.74 Options.bat"
the script starts notepad with configuration file: here change
windowresolution=1600x800
output=ddraw
(the resolution can't be changed if output=surface - that's the default).
- safe configuration file changes.
How to add chmod permissions to file in Git?
According to official documentation, you can set or remove the "executable" flag on any tracked file using update-index sub-command.
To set the flag, use following command:
git update-index --chmod=+x path/to/file
To remove it, use:
git update-index --chmod=-x path/to/file
Under the hood
While this looks like the regular unix files permission system, actually it is not. Git maintains a special "mode" for each file in its internal storage:
100644for regular files100755for executable ones
You can visualize it using ls-file subcommand, with --stage option:
$ git ls-files --stage
100644 aee89ef43dc3b0ec6a7c6228f742377692b50484 0 .gitignore
100755 0ac339497485f7cc80d988561807906b2fd56172 0 my_executable_script.sh
By default, when you add a file to a repository, Git will try to honor its filesystem attributes and set the correct filemode accordingly. You can disable this by setting core.fileMode option to false:
git config core.fileMode false
Troubleshooting
If at some point the Git filemode is not set but the file has correct filesystem flag, try to remove mode and set it again:
git update-index --chmod=-x path/to/file
git update-index --chmod=+x path/to/file
Bonus
Starting with Git 2.9, you can stage a file AND set the flag in one command:
git add --chmod=+x path/to/file
Apache is "Unable to initialize module" because of module's and PHP's API don't match after changing the PHP configuration
I'd the same error even after recompiling the modules.
But I solved it you just have to specify the absolute path of your phpize.
make *** no targets specified and no makefile found. stop
make takes a makefile as input. Makefile usually is named makefile or Makefile. The configure command should generate a makefile, so that make could be in turn executed. Check if a makefile has been generated under your working directory.
Checkout multiple git repos into same Jenkins workspace
We are using git-repo to manage our multiple GIT repositories. There is also a Jenkins Repo plugin that allows to checkout all or part of the repositories managed by git-repo to the same Jenkins job workspace.
Regular expression to extract numbers from a string
we can use \b as a word boundary and then; \b\d+\b
Get Absolute URL from Relative path (refactored method)
Here is my own version that handles many validations and relative pathing from user's current location option. Feel free to refactor from here :)
/// <summary>
/// Converts the provided app-relative path into an absolute Url containing
/// the full host name
/// </summary>
/// <param name="relativeUrl">App-Relative path</param>
/// <returns>Provided relativeUrl parameter as fully qualified Url</returns>
/// <example>~/path/to/foo to http://www.web.com/path/to/foo</example>
public static string GetAbsoluteUrl(string relativeUrl)
{
//VALIDATE INPUT
if (String.IsNullOrEmpty(relativeUrl))
return String.Empty;
//VALIDATE INPUT FOR ALREADY ABSOLUTE URL
if (relativeUrl.StartsWith("http://", StringComparison.OrdinalIgnoreCase)
|| relativeUrl.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
return relativeUrl;
//VALIDATE CONTEXT
if (HttpContext.Current == null)
return relativeUrl;
//GET CONTEXT OF CURRENT USER
HttpContext context = HttpContext.Current;
//FIX ROOT PATH TO APP ROOT PATH
if (relativeUrl.StartsWith("/"))
relativeUrl = relativeUrl.Insert(0, "~");
//GET RELATIVE PATH
Page page = context.Handler as Page;
if (page != null)
{
//USE PAGE IN CASE RELATIVE TO USER'S CURRENT LOCATION IS NEEDED
relativeUrl = page.ResolveUrl(relativeUrl);
}
else //OTHERWISE ASSUME WE WANT ROOT PATH
{
//PREPARE TO USE IN VIRTUAL PATH UTILITY
if (!relativeUrl.StartsWith("~/"))
relativeUrl = relativeUrl.Insert(0, "~/");
relativeUrl = VirtualPathUtility.ToAbsolute(relativeUrl);
}
var url = context.Request.Url;
var port = url.Port != 80 ? (":" + url.Port) : String.Empty;
//BUILD AND RETURN ABSOLUTE URL
return String.Format("{0}://{1}{2}{3}",
url.Scheme, url.Host, port, relativeUrl);
}
Solving SharePoint Server 2010 - 503. The service is unavailable, After installation
I agree with Beytan Kurt.
I had 503 thrown for both the Central Admin site as well as the SharePoint landing page. In both cases the Passwords were expired.
After resetting the password in the AD, and refreshing the Identity, CA worked but the SharePoint landing page threw a 500 error.
It turned out that the .Net Framework Version was set to V4.0. I changed it to V2.0 and it worked.
Remember after each change you need to recycle the appropriate app pool.
How to print variables in Perl
You should always include all relevant code when asking a question. In this case, the print statement that is the center of your question. The print statement is probably the most crucial piece of information. The second most crucial piece of information is the error, which you also did not include. Next time, include both of those.
print $ids should be a fairly hard statement to mess up, but it is possible. Possible reasons:
$idsis undefined. Gives the warningundefined value in print$idsis out of scope. Withuse strict, gives fatal warningGlobal variable $ids needs explicit package name, and otherwise the undefined warning from above.- You forgot a semi-colon at the end of the line.
- You tried to do
print $ids $nIds, in which case perl thinks that$idsis supposed to be a filehandle, and you get an error such asprint to unopened filehandle.
Explanations
1: Should not happen. It might happen if you do something like this (assuming you are not using strict):
my $var;
while (<>) {
$Var .= $_;
}
print $var;
Gives the warning for undefined value, because $Var and $var are two different variables.
2: Might happen, if you do something like this:
if ($something) {
my $var = "something happened!";
}
print $var;
my declares the variable inside the current block. Outside the block, it is out of scope.
3: Simple enough, common mistake, easily fixed. Easier to spot with use warnings.
4: Also a common mistake. There are a number of ways to correctly print two variables in the same print statement:
print "$var1 $var2"; # concatenation inside a double quoted string
print $var1 . $var2; # concatenation
print $var1, $var2; # supplying print with a list of args
Lastly, some perl magic tips for you:
use strict;
use warnings;
# open with explicit direction '<', check the return value
# to make sure open succeeded. Using a lexical filehandle.
open my $fh, '<', 'file.txt' or die $!;
# read the whole file into an array and
# chomp all the lines at once
chomp(my @file = <$fh>);
close $fh;
my $ids = join(' ', @file);
my $nIds = scalar @file;
print "Number of lines: $nIds\n";
print "Text:\n$ids\n";
Reading the whole file into an array is suitable for small files only, otherwise it uses a lot of memory. Usually, line-by-line is preferred.
Variations:
print "@file"is equivalent to$ids = join(' ',@file); print $ids;$#filewill return the last index in@file. Since arrays usually start at 0,$#file + 1is equivalent toscalar @file.
You can also do:
my $ids;
do {
local $/;
$ids = <$fh>;
}
By temporarily "turning off" $/, the input record separator, i.e. newline, you will make <$fh> return the entire file. What <$fh> really does is read until it finds $/, then return that string. Note that this will preserve the newlines in $ids.
Line-by-line solution:
open my $fh, '<', 'file.txt' or die $!; # btw, $! contains the most recent error
my $ids;
while (<$fh>) {
chomp;
$ids .= "$_ "; # concatenate with string
}
my $nIds = $.; # $. is Current line number for the last filehandle accessed.
How do you do natural logs (e.g. "ln()") with numpy in Python?
I usually do like this:
from numpy import log as ln
Perhaps this can make you more comfortable.
C - gettimeofday for computing time?
No. gettimeofday should NEVER be used to measure time.
This is causing bugs all over the place. Please don't add more bugs.
Animate element transform rotate
//this should allow you to replica an animation effect for any css property, even //properties //that transform animation jQuery plugins do not allow
function twistMyElem(){
var ball = $('#form');
document.getElementById('form').style.zIndex = 1;
ball.animate({ zIndex : 360},{
step: function(now,fx){
ball.css("transform","rotateY(" + now + "deg)");
},duration:3000
}, 'linear');
}