I use the following with python 3.8
string4 = f'{string1}{string2}{string3}'
How about that?
function internalHandler(e) {
e.preventDefault(); // required in some browsers
e.returnValue = ""; // required in some browsers
return "Custom message to show to the user"; // only works in old browsers
}
if (window.addEventListener) {
window.addEventListener('beforeunload', internalHandler, true);
} else if (window.attachEvent) {
window.attachEvent('onbeforeunload', internalHandler);
}
I think this is a common problem. Separating the "initialization" of the singleton from the "get" of the singleton might work (this example uses a variation of double checked locking).
public class MySingleton {
private static volatile MySingleton INSTANCE;
@SuppressWarnings("UnusedAssignment")
public static void initialize(
final SomeDependency someDependency) {
MySingleton result = INSTANCE;
if (result != null) {
throw new IllegalStateException("The singleton has already "
+ "been initialized.");
}
synchronized (MySingleton.class) {
result = INSTANCE;
if (result == null) {
INSTANCE = result = new MySingleton(someDependency);
}
}
}
public static MySingleton get() {
MySingleton result = INSTANCE;
if (result == null) {
throw new IllegalStateException("The singleton has not been "
+ "initialized. You must call initialize(...) before "
+ "calling get()");
}
return result;
}
...
}
I think you missed a equal sign at:
Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + "" + l, null, null, null, null);
Change to:
Cursor c = ourDatabase.query(DATABASE_TABLE, column, KEY_ROWID + " = " + l, null, null, null, null);
SLF4J 1.5.11 and 1.6.0 versions are not compatible (see compatibility report) because the argument list of org.slf4j.spi.LocationAwareLogger.log
method has been changed (added Object[] p5):
SLF4J 1.5.11:
LocationAwareLogger.log ( org.slf4j.Marker p1, String p2, int p3,
String p4, Throwable p5 )
SLF4J 1.6.0:
LocationAwareLogger.log ( org.slf4j.Marker p1, String p2, int p3,
String p4, Object[] p5, Throwable p6 )
See compatibility reports for other SLF4J versions on this page.
You can generate such reports by the japi-compliance-checker tool.
If you plan on writing any asynchronous, parallel, or distributed code, you will probably prefer map
over a list comprehension -- as most asynchronous, parallel, or distributed packages provide a map
function to overload python's map
. Then by passing the appropriate map
function to the rest of your code, you may not have to modify your original serial code to have it run in parallel (etc).
SELECT DOB AS Birthdate ,
YEAR(GETDATE()) AS ThisYear,
YEAR(getdate()) - YEAR(DOB) AS Age
FROM tableprincejain
On some earlier iOS versions(like iOS 9, 10), scrollViewDidEndDecelerating
won't be triggered if the scrollView is suddenly stopped by touching.
But in the current version (iOS 13), scrollViewDidEndDecelerating
will be triggered for sure (As far as I know).
So, if your App targeted earlier versions as well, you might need a workaround like the one mentioned by Ashley Smart, or you can the following one.
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
if !scrollView.isTracking, !scrollView.isDragging, !scrollView.isDecelerating { // 1
scrollViewDidEndScrolling(scrollView)
}
}
func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
if !decelerate, scrollView.isTracking, !scrollView.isDragging, !scrollView.isDecelerating { // 2
scrollViewDidEndScrolling(scrollView)
}
}
func scrollViewDidEndScrolling(_ scrollView: UIScrollView) {
// Do something here
}
UIScrollView will be stoped in three ways:
- quickly scrolled and stopped by itself
- quickly scrolled and stopped by finger touch (like Emergency brake)
- slowly scrolled and stopped
The first one can be detected by scrollViewDidEndDecelerating
and other similar methods while the other two can't.
Luckily, UIScrollView
has three statuses we can use to identify them, which is used in the two lines commented by "//1" and "//2".
Just for the sake of academic interest, I did it this way...
(dt.replace(month = dt.month % 12 +1, day = 1)-timedelta(days=1)).day
I have not compiled this as it is meant for a proof of concept. This is how I have implemented a Progress bar for database access in the past. This example shows access to a SQLite database using the System.Data.SQLite module
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
// Get the BackgroundWorker that raised this event.
BackgroundWorker worker = sender as BackgroundWorker;
using(SQLiteConnection cnn = new SQLiteConnection("Data Source=MyDatabase.db"))
{
cnn.Open();
int TotalQuerySize = GetQueryCount("Query", cnn); // This needs to be implemented and is not shown in example
using (SQLiteCommand cmd = cnn.CreateCommand())
{
cmd.CommandText = "Query is here";
using(SQLiteDataReader reader = cmd.ExecuteReader())
{
int i = 0;
while(reader.Read())
{
// Access the database data using the reader[]. Each .Read() provides the next Row
if(worker.WorkerReportsProgress) worker.ReportProgress(++i * 100/ TotalQuerySize);
}
}
}
}
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.progressBar1.Value = e.ProgressPercentage;
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// Notify someone that the database access is finished. Do stuff to clean up if needed
// This could be a good time to hide, clear or do somthign to the progress bar
}
public void AcessMySQLiteDatabase()
{
BackgroundWorker backgroundWorker1 = new BackgroundWorker();
backgroundWorker1.DoWork +=
new DoWorkEventHandler(backgroundWorker1_DoWork);
backgroundWorker1.RunWorkerCompleted +=
new RunWorkerCompletedEventHandler(
backgroundWorker1_RunWorkerCompleted);
backgroundWorker1.ProgressChanged +=
new ProgressChangedEventHandler(
backgroundWorker1_ProgressChanged);
}
Setp 1 : Download the following apk files. 1)com.google.android.gms.apk (https://androidfilehost.com/?fid=95916177934534438) 2)com.android.vending-4.4.22.apk (https://androidfilehost.com/?fid=23203820527945795)
Step 2 : Create a new AVD without the google API's
Step 3 : Run the AVD (Start the emulator)
Step 4 : Install the downloaded apks using adb .
1)adb install com.google.android.gms-6.7.76_\(1745988-038\)-6776038-minAPI9.apk
2)adb install com.android.vending-4.4.22.apk
adb come up with android sdks/studio
Step 5 : Create the application in google developer console
Step 6 : Configure the api key in your Androidmanifest.xml and google api version.
Note : In step1 you need to download the apk based on your Android API level(..18,19,21..) and google play services version (5,5.1,6,6.5......)
This will work 100%.
How about just a simple reset button?
<form>
<input type="text" id="textfield1" size="5">
<input type="text" id="textfield2" size="5">
<input type="reset" value="Reset">
</form>
You need to precede the lines starting with gcc
and rm
with a hard tab. Commands in make rules are required to start with a tab (unless they follow a semicolon on the same line).
The result should look like this:
PROG = semsearch
all: $(PROG)
%: %.c
gcc -o $@ $< -lpthread
clean:
rm $(PROG)
Note that some editors may be configured to insert a sequence of spaces instead of a hard tab. If there are spaces at the start of these lines you'll also see the "missing separator" error. If you do have problems inserting hard tabs, use the semicolon way:
PROG = semsearch
all: $(PROG)
%: %.c ; gcc -o $@ $< -lpthread
clean: ; rm $(PROG)
Instead of
formGroupName="i"
You must use:
[formGroupName]="i"
Tips:
Since you're looping over the controls, you've already the variable area
, so you can replace this:
*ngIf="areasForm.get('areas').controls[i].name.hasError('required')"
by:
*ngIf="area.hasError('required', 'name')"
You can post large amount of data by setting php.ini variable: max_input_vars
Default size of this variable is 1000 but if you want to sent large amount of data you have to increase the size accordingly.
If you can't set the size from ini_set you have to do it through htaccess
or by doing changes into php.ini file directly.
max_input_vars 2500
memory_limit 256M
If you are running multiple instances of Tomcat on a single host you should set CATALINA_BASE
to be equal to the .../tomcat_instance1
or .../tomcat_instance2
directory as appropriate for each instance and the CATALINA_HOME
environment variable to the common Tomcat installation whose files will be shared between the two instances.
The CATALINA_BASE
environment is optional if you are running a single Tomcat instance on the host and will default to CATALINA_HOME
in that case. If you are running multiple instances as you are it should be provided.
There is a pretty good description of this setup in the RUNNING.txt
file in the root of the Apache Tomcat distribution under the heading Advanced Configuration - Multiple Tomcat Instances
It's hard to answer you without the HTML, but in general you can put:
style="width: 50%;"
On either the table cell, or place a div inside the table cell, and put the style on that.
But one problem is "50% of what?" It's 50% of the parent element which may not be what you want.
Post a copy of your HTML and maybe you'll get a better answer.
You can use something like this: Arrays#copyOfRange
This is a simple solution for opening a new tab, changing focus to it, closing the tab and return focus to the old/original tab:
@Test
public void testTabs() {
driver.get("https://business.twitter.com/start-advertising");
assertStartAdvertising();
// considering that there is only one tab opened in that point.
String oldTab = driver.getWindowHandle();
driver.findElement(By.linkText("Twitter Advertising Blog")).click();
ArrayList<String> newTab = new ArrayList<String>(driver.getWindowHandles());
newTab.remove(oldTab);
// change focus to new tab
driver.switchTo().window(newTab.get(0));
assertAdvertisingBlog();
// Do what you want here, you are in the new tab
driver.close();
// change focus back to old tab
driver.switchTo().window(oldTab);
assertStartAdvertising();
// Do what you want here, you are in the old tab
}
private void assertStartAdvertising() {
assertEquals("Start Advertising | Twitter for Business", driver.getTitle());
}
private void assertAdvertisingBlog() {
assertEquals("Twitter Advertising", driver.getTitle());
}
This ought to do it:
SELECT *
FROM YourTable
WHERE ARIDNR IN (
SELECT ARIDNR
FROM YourTable
GROUP BY ARIDNR
HAVING COUNT(*) > 1
)
The idea is to use the inner query to identify the records which have a ARIDNR
value that occurs 1+ times in the data, then get all columns from the same table based on that set of values.
After executing the below regex, your answer is in the first capture.
/^(.*?)\.txt/
If you don't want to clutter up your console with error messages, you can also run
git ls-files file_name
and then check the result. If git returns nothing, then the file is not tracked. If it's tracked, git will return the file path.
This comes in handy if you want to combine it in a script, for example PowerShell:
$gitResult = (git ls-files $_) | out-string
if ($gitResult.length -ne 0)
{
## do stuff with the tracked file
}
Just use padding to wrap it like this:
Column(
children: <Widget>[
Padding(
padding: EdgeInsets.all(8.0),
child: Text('Hello World!'),
),
Padding(
padding: EdgeInsets.all(8.0),
child: Text('Hello World2!'),
)
]);
You can also use Container(padding...) or SizeBox(height: x.x). The last one is the most common but it will depents of how you want to manage the space of your widgets, I like to use padding if the space is part of the widget indeed and use sizebox for lists for example.
This error may be about password characters. If your password contains special characters and also you add your password into Transport
class methods;
For Example
Transport transport = session.getTransport("smtp");
transport.connect("user","passw@rd");
or
Transport.send(msg, "user", "passw%rd");
you may get that error. Because Transport
class' methods may not handle special characters. If you add your username and password into your message using javax.mail.PasswordAuthentication
class, i hope you will escape that error;
For Example
...
Session session = Session.getInstance(props, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication("user", "pas$w@r|d");
}
});
Message message = new MimeMessage(session);
...
Transport.send(message);
This is how I did it:
I added the connection string at appsettings.json
"ConnectionStrings": {
"conStr": "Server=MYSERVER;Database=MYDB;Trusted_Connection=True;MultipleActiveResultSets=true"},
I created a class called SqlHelper
public class SqlHelper
{
//this field gets initialized at Startup.cs
public static string conStr;
public static SqlConnection GetConnection()
{
try
{
SqlConnection connection = new SqlConnection(conStr);
return connection;
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
}
At the Startup.cs I used ConfigurationExtensions.GetConnectionString to get the connection,and I assigned it to SqlHelper.conStr
public Startup(IConfiguration configuration)
{
Configuration = configuration;
SqlHelper.connectionString = ConfigurationExtensions.GetConnectionString(this.Configuration, "conStr");
}
Now wherever you need the connection string you just call it like this:
SqlHelper.GetConnection();
Map<String, Object> config = gson.fromJson(reader, Map.class);
Easy peasy:
var date = DateTime.Parse("14/11/2011"); // may need some Culture help here
Console.Write(date.ToString("yyyy-MM-dd"));
Take a look at DateTime.ToString() method, Custom Date and Time Format Strings and Standard Date and Time Format Strings
string customFormattedDateTimeString = DateTime.Now.ToString("yyyy-MM-dd");
/^$|\s+/
This matches when empty or white spaces
/(?!^$)([^\s])/
This matches when its not empty or white spaces
Don't forget to contact your system administrator.
Because in my case I had every thing rightly configured(SSH also added) but I got the same error
repository access denied. fatal: Could not read from remote repository.
the reason was I only had read access to that repository. Therefore with out wasting your valuable time please check that as the first thing. Thank you.
Ping is meant to be sent only from server to client, and browser should answer as soon as possible with Pong OpCode, automatically. So you have not to worry about that on higher level.
Although that not all browsers support standard as they suppose to, they might have some differences in implementing such mechanism, and it might even means there is no Pong response functionality. But personally I am using Ping / Pong, and never saw client that does not implement this type of OpCode and automatic response on low level client side implementation.
void replace(char *str, char *strFnd, char *strRep)
{
for (int i = 0; i < strlen(str); i++)
{
int npos = -1, j, k;
if (str[i] == strFnd[0])
{
for (j = 1, k = i+1; j < strlen(strFnd); j++)
if (str[k++] != strFnd[j])
break;
npos = i;
}
if (npos != -1)
for (j = 0, k = npos; j < strlen(strRep); j++)
str[k++] = strRep[j];
}
}
int main()
{
char pst1[] = "There is a wrong message";
char pfnd[] = "wrong";
char prep[] = "right";
cout << "\nintial:" << pst1;
replace(pst1, pfnd, prep);
cout << "\nfinal : " << pst1;
return 0;
}
It is very easy:
As mentioned in previous answers, you can cast directly to the underlying datatype (int -> enum type) or parse (string -> enum type).
but beware - there is no .TryParse for enums, so you WILL need a try/catch block around the parse to catch failures.
Why using selector
as the root tag? selector
is used for applying multiple alternate drawables for different states of the view, so in this case, there is no need for selector
.
Try the following code.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Background Color -->
<solid android:color="#ffffff" />
<!-- Border Color -->
<stroke android:width="1dp" android:color="#ff9900" />
<!-- Round Corners -->
<corners android:radius="5dp" />
</shape>
Also It's worth mentioning that all color entries support alpha channel as well, meaning that you can have transparent or semi-transparent colors. For example #RRGGBBAA
.
adjust the background-position to move background images in different positions of the div
div {
background-image: url('image url')
background-position: 0 -250px;
}
For-loop in C:
for(int x = 0; x<=3; x++)
{
//Do something!
}
The same loop in 8086 assembler:
xor cx,cx ; cx-register is the counter, set to 0
loop1 nop ; Whatever you wanna do goes here, should not change cx
inc cx ; Increment
cmp cx,3 ; Compare cx to the limit
jle loop1 ; Loop while less or equal
That is the loop if you need to access your index (cx). If you just wanna to something 0-3=4 times but you do not need the index, this would be easier:
mov cx,4 ; 4 iterations
loop1 nop ; Whatever you wanna do goes here, should not change cx
loop loop1 ; loop instruction decrements cx and jumps to label if not 0
If you just want to perform a very simple instruction a constant amount of times, you could also use an assembler-directive which will just hardcore that instruction
times 4 nop
Do-while-loop in C:
int x=1;
do{
//Do something!
}
while(x==1)
The same loop in assembler:
mov ax,1
loop1 nop ; Whatever you wanna do goes here
cmp ax,1 ; Check wether cx is 1
je loop1 ; And loop if equal
While-loop in C:
while(x==1){
//Do something
}
The same loop in assembler:
jmp loop1 ; Jump to condition first
cloop1 nop ; Execute the content of the loop
loop1 cmp ax,1 ; Check the condition
je cloop1 ; Jump to content of the loop if met
For the for-loops you should take the cx-register because it is pretty much standard. For the other loop conditions you can take a register of your liking. Of course replace the no-operation instruction with all the instructions you wanna perform in the loop.
The IFRAME
element may be a security risk if your site is embedded inside an IFRAME
on hostile site. Google "clickjacking" for more details. Note that it does not matter if you use <iframe>
or not. The only real protection from this attack is to add HTTP header X-Frame-Options: DENY
and hope that the browser knows its job.
In addition, IFRAME element may be a security risk if any page on your site contains an XSS vulnerability which can be exploited. In that case the attacker can expand the XSS attack to any page within the same domain that can be persuaded to load within an <iframe>
on the page with XSS vulnerability. This is because content from the same origin (same domain) is allowed to access the parent content DOM (practically execute JavaScript in the "host" document). The only real protection methods from this attack is to add HTTP header X-Frame-Options: DENY
and/or always correctly encode all user submitted data (that is, never have an XSS vulnerability on your site - easier said than done).
That's the technical side of the issue. In addition, there's the issue of user interface. If you teach your users to trust that URL bar is supposed to not change when they click links (e.g. your site uses a big iframe with all the actual content), then the users will not notice anything in the future either in case of actual security vulnerability. For example, you could have an XSS vulnerability within your site that allows the attacker to load content from hostile source within your iframe. Nobody could tell the difference because the URL bar still looks identical to previous behavior (never changes) and the content "looks" valid even though it's from hostile domain requesting user credentials.
If somebody claims that using an <iframe>
element on your site is dangerous and causes a security risk, he does not understand what <iframe>
element does, or he is speaking about possibility of <iframe>
related vulnerabilities in browsers. Security of <iframe src="...">
tag is equal to <img src="..."
or <a href="...">
as long there are no vulnerabilities in the browser. And if there's a suitable vulnerability, it might be possible to trigger it even without using <iframe>
, <img>
or <a>
element, so it's not worth considering for this issue.
However, be warned that content from <iframe>
can initiate top level navigation by default. That is, content within the <iframe>
is allowed to automatically open a link over current page location (the new location will be visible in the address bar). The only way to avoid that is to add sandbox
attribute without value allow-top-navigation
. For example, <iframe sandbox="allow-forms allow-scripts" ...>
. Unfortunately, sandbox also disables all plugins, always. For example, Youtube content cannot be sandboxed because Flash player is still required to view all Youtube content. No browser supports using plugins and disallowing top level navigation at the same time.
Note that X-Frame-Options: DENY
also protects from rendering performance side-channel attack that can read content cross-origin (also known as "Pixel perfect Timing Attacks").
Use of Global variables actually depends on the requirements. Its advantage is that,it reduces the overhead of passing the values repeatedly.
But your professor is right because it raises security issues so use of global variables should be avoided as much as possible. Global variables also create problems which are sometimes difficult to debug.
For example:-
Situations when the variables values is getting modified on runtime. At that moment its difficult to identify which part of code is modifying it and on what conditions.
You could do it in two lines like this:
now = datetime.now()
last_month = datetime(now.year, now.month - 1, now.day)
remember the imports
from datetime import datetime
I didn't know the existing sa password so this is what I did:
Open Services in Control Panel
Find the "SQL Server (SQLEXPRESS)" entry and select properties
Stop the service
Enter "-m" at the beginning of the "Start parameters" fields. If there are other parameters there already add a semi-colon after -m;
Start the service
Open a Command Prompt
Enter the command:
osql -S YourPcName\SQLEXPRESS -E
(change YourPcName to whatever your PC is called).
alter login sa enable go sp_password NULL,'new_password','sa' go quit
Stop the "SQL Server (SQLEXPRESS)" service
Remove the "-m" from the Start parameters field
Start the service
I have found that it is a bit hard to comprehend or understand the benefits of some patterns until one understands the problems they solve and the other (worse) ways the problems have been implemented.
Other than the GOF and POSA books I have not really read any so I can't give you other recommendations. Really you just have to have an understanding of the problems domains and I think that many less experienced developers may not be able to appreciate the benefits of patterns. This is no slight against them. It is a lot easier to embrace, understand and appreciate good solutions when one has to struggle with poor alternatives first.
Good luck
To call the function on click of some html element (control).
$('#controlID').click(myFunction);
You will need to ensure you bind the event when your html element is ready on which you binding the event. You can put the code in document.ready
$(document).ready(function(){
$('#controlID').click(myFunction);
});
You can use anonymous function to bind the event to the html element.
$(document).ready(function(){
$('#controlID').click(function(){
$.messager.show({
title:'My Title',
msg:'The message content',
showType:'fade',
style:{
right:'',
bottom:''
}
});
});
});
If you want to bind click with many elements you can use class selector
$('.someclass').click(myFunction);
Edit based on comments by OP, If you want to call function under some condition
You can use if for conditional execution, for example,
if(a == 3)
myFunction();
You can get first element via index selector:
$('div.second div:eq(0)')
Ages ago, in November 2005, AlistApart.com published an article on how they published a book using nothing but HTML and CSS. See: http://alistapart.com/article/boom
Here's an excerpt of that article:
CSS2 has a notion of paged media (think sheets of paper), as opposed to continuous media (think scrollbars). Style sheets can set the size of pages and their margins. Page templates can be given names and elements can state which named page they want to be printed on. Also, elements in the source document can force page breaks. Here is a snippet from the style sheet we used:
@page { size: 7in 9.25in; margin: 27mm 16mm 27mm 16mm; }
Having a US-based publisher, we were given the page size in inches. We, being Europeans, continued with metric measurements. CSS accepts both.
After setting the up the page size and margin, we needed to make sure there are page breaks in the right places. The following excerpt shows how page breaks are generated after chapters and appendices:
div.chapter, div.appendix { page-break-after: always; }
Also, we used CSS2 to declare named pages:
div.titlepage { page: blank; }
That is, the title page is to be printed on pages with the name “blank.” CSS2 described the concept of named pages, but their value only becomes apparent when headers and footers are available.
Anyway…
Since you want to print A4, you'll need different dimensions of course:
@page {
size: 21cm 29.7cm;
margin: 30mm 45mm 30mm 45mm;
/* change the margins as you want them to be. */
}
The article dives into things like setting page-breaks, etc. so you might want to read that completely.
In your case, the trick is to create the print CSS first. Most modern browsers (>2005) support zooming and will already be able to display a website based on the print CSS.
Now, you'll want to make the web display look a bit different and adapt the whole design to fit most browsers too (including the old, pre 2005 ones). For that, you'll have to create a web CSS file or override some parts of your print CSS. When creating CSS for web display, remember that a browser can have ANY size (think: “mobile” up to “big-screen TVs”). Meaning: for the web CSS your page-width and image-width is best set using a variable width (%) to support as many display devices and web-browsing clients as possible.
EDIT (26-02-2015)
Today, I happened to stumble upon another, more recent article at SmashingMagazine which also dives into designing for print with HTML and CSS… just in case you could use yet-another-tutorial.
EDIT (30-10-2018)
It has been brought to my attention in that size
is not valid CSS3, which is indeed correct — I merely repeated the code quoted in the article which (as noted) was good old CSS2 (which makes sense when you look at the year the article and this answer were first published). Anyway, here's the valid CSS3 code for your copy-and-paste convenience:
@media print {
body{
width: 21cm;
height: 29.7cm;
margin: 30mm 45mm 30mm 45mm;
/* change the margins as you want them to be. */
}
}
In case you think you really need pixels (you should actually avoid using pixels), you will have to take care of choosing the correct DPI for printing:
Yet, I would avoid the hassle and simply use cm
(centimeters) or mm
(millimeters) for sizing as that avoids rendering glitches that can arise depending on which client you use.
Apple Docs:
- (id)initWithFrame:(CGRect)frame
collectionViewLayout:(UICollectionViewLayout *)layoutParameters
Use this method when initializing a collection view object programmatically. If you specify nil for the layout parameter, you must assign a layout object to the collectionViewLayout property before displaying the collection view onscreen. If you do not, the collection view will be unable to present any items onscreen.
This method is the designated initializer.
This method is used to initialize the UICollectionView
.
here you provide frame and a UICollectionViewLayout
object.
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init];
At the end, add UICollectionView
as a subview
to your view.
Now collection view is added pro grammatically. You can go on learning.
Happy learning!! Hope it helps you.
You never want to call thread.sleep()
on the UI
thread as it sounds like you have figured out. This freezes the UI
and is always a bad thing to do. You can use a separate Thread
and postDelayed
This SO answer shows how to do that as well as several other options
You can look at these and see which will work best for your particular situation
It's very important for accessibility reasons that you always specify value of the submit even if you are hiding this text, or if you use <input type="image" .../>
to always specify alt=""
attribute for this input field.
Blind people don't know what button will do if it doesn't contain meaningful alt=""
or value=""
.
Aspose.Cells for Java supports XLSX format. You may find more details and further help in Aspose.Cells for Java Documentation. Please see if this helps.
Disclosure: I work as developer evangelist at Aspose.
Here's a one page cart written in Javascript with localStorage. Here's a full working pen. Previously found on Codebox
cart.js
var cart = {
// (A) PROPERTIES
hPdt : null, // HTML products list
hItems : null, // HTML current cart
items : {}, // Current items in cart
// (B) LOCALSTORAGE CART
// (B1) SAVE CURRENT CART INTO LOCALSTORAGE
save : function () {
localStorage.setItem("cart", JSON.stringify(cart.items));
},
// (B2) LOAD CART FROM LOCALSTORAGE
load : function () {
cart.items = localStorage.getItem("cart");
if (cart.items == null) { cart.items = {}; }
else { cart.items = JSON.parse(cart.items); }
},
// (B3) EMPTY ENTIRE CART
nuke : function () {
if (confirm("Empty cart?")) {
cart.items = {};
localStorage.removeItem("cart");
cart.list();
}
},
// (C) INITIALIZE
init : function () {
// (C1) GET HTML ELEMENTS
cart.hPdt = document.getElementById("cart-products");
cart.hItems = document.getElementById("cart-items");
// (C2) DRAW PRODUCTS LIST
cart.hPdt.innerHTML = "";
let p, item, part;
for (let id in products) {
// WRAPPER
p = products[id];
item = document.createElement("div");
item.className = "p-item";
cart.hPdt.appendChild(item);
// PRODUCT IMAGE
part = document.createElement("img");
part.src = "images/" +p.img;
part.className = "p-img";
item.appendChild(part);
// PRODUCT NAME
part = document.createElement("div");
part.innerHTML = p.name;
part.className = "p-name";
item.appendChild(part);
// PRODUCT DESCRIPTION
part = document.createElement("div");
part.innerHTML = p.desc;
part.className = "p-desc";
item.appendChild(part);
// PRODUCT PRICE
part = document.createElement("div");
part.innerHTML = "$" + p.price;
part.className = "p-price";
item.appendChild(part);
// ADD TO CART
part = document.createElement("input");
part.type = "button";
part.value = "Add to Cart";
part.className = "cart p-add";
part.onclick = cart.add;
part.dataset.id = id;
item.appendChild(part);
}
// (C3) LOAD CART FROM PREVIOUS SESSION
cart.load();
// (C4) LIST CURRENT CART ITEMS
cart.list();
},
// (D) LIST CURRENT CART ITEMS (IN HTML)
list : function () {
// (D1) RESET
cart.hItems.innerHTML = "";
let item, part, pdt;
let empty = true;
for (let key in cart.items) {
if(cart.items.hasOwnProperty(key)) { empty = false; break; }
}
// (D2) CART IS EMPTY
if (empty) {
item = document.createElement("div");
item.innerHTML = "Cart is empty";
cart.hItems.appendChild(item);
}
// (D3) CART IS NOT EMPTY - LIST ITEMS
else {
let p, total = 0, subtotal = 0;
for (let id in cart.items) {
// ITEM
p = products[id];
item = document.createElement("div");
item.className = "c-item";
cart.hItems.appendChild(item);
// NAME
part = document.createElement("div");
part.innerHTML = p.name;
part.className = "c-name";
item.appendChild(part);
// REMOVE
part = document.createElement("input");
part.type = "button";
part.value = "X";
part.dataset.id = id;
part.className = "c-del cart";
part.addEventListener("click", cart.remove);
item.appendChild(part);
// QUANTITY
part = document.createElement("input");
part.type = "number";
part.value = cart.items[id];
part.dataset.id = id;
part.className = "c-qty";
part.addEventListener("change", cart.change);
item.appendChild(part);
// SUBTOTAL
subtotal = cart.items[id] * p.price;
total += subtotal;
}
// EMPTY BUTTONS
item = document.createElement("input");
item.type = "button";
item.value = "Empty";
item.addEventListener("click", cart.nuke);
item.className = "c-empty cart";
cart.hItems.appendChild(item);
// CHECKOUT BUTTONS
item = document.createElement("input");
item.type = "button";
item.value = "Checkout - " + "$" + total;
item.addEventListener("click", cart.checkout);
item.className = "c-checkout cart";
cart.hItems.appendChild(item);
}
},
// (E) ADD ITEM INTO CART
add : function () {
if (cart.items[this.dataset.id] == undefined) {
cart.items[this.dataset.id] = 1;
} else {
cart.items[this.dataset.id]++;
}
cart.save();
cart.list();
},
// (F) CHANGE QUANTITY
change : function () {
if (this.value == 0) {
delete cart.items[this.dataset.id];
} else {
cart.items[this.dataset.id] = this.value;
}
cart.save();
cart.list();
},
// (G) REMOVE ITEM FROM CART
remove : function () {
delete cart.items[this.dataset.id];
cart.save();
cart.list();
},
// (H) CHECKOUT
checkout : function () {
// SEND DATA TO SERVER
// CHECKS
// SEND AN EMAIL
// RECORD TO DATABASE
// PAYMENT
// WHATEVER IS REQUIRED
alert("TO DO");
/*
var data = new FormData();
data.append('cart', JSON.stringify(cart.items));
data.append('products', JSON.stringify(products));
var xhr = new XMLHttpRequest();
xhr.open("POST", "SERVER-SCRIPT");
xhr.onload = function(){ ... };
xhr.send(data);
*/
}
};
window.addEventListener("DOMContentLoaded", cart.init);
Suppose you are building a CMS for a website, where your pages are in a tree structure, with say the root being the home-page.
Suppose also your {user|client|customer|boss} requests that you place a breadcrumb trail on every page to show where you are in the tree.
For any given page n, you'll may want to walk up to the parent of n, and its parent, and so on, recursively to build a list of nodes back up to the root of page tree.
Of course, you're hitting the db several times per page in that example, so you may want to use some SQL aliasing where you look up page-table as a, and page-table again as b, and join a.id with b.parent so you make the database do the recursive joins. It's been a while, so my syntax is probably not helpful.
Then again, you may just want to only calculate this once and store it with the page record, only updating it if you move the page. That'd probably be more efficient.
Anyway, that's my $.02
A lot of the answers are providing custom examples because of the accepted answer's dependency on System.Web. From the Microsoft.AspNet.WebApi.Client NuGet package there is a UriExtensions.ParseQueryString, method that can also be used:
var uri = new Uri("https://stackoverflow.com/a/22167748?p1=6&p2=7&p3=8");
NameValueCollection query = uri.ParseQueryString();
So if you want to avoid the System.Web dependency and don't want to roll your own, this is a good option.
Make sure that when you are running your python code that it is in the python3 context. I had the same issue and all I had to do was input the command as:
sudo python3 REPLACE.py
versus
sudo python REPLACE.py
the latter code is incorrect because tkinter is apparently unnavailable in python1 or python2.
This one works fine for me with apis
import requests
data={'Id':id ,'name': name}
r = requests.post( url = 'https://apiurllink', data = data)
Well, if you would like to catch all exception to create a minidump for example...
Somebody did the work on Windows.
See http://www.codeproject.com/Articles/207464/Exception-Handling-in-Visual-Cplusplus In the article, he explains how he found out how to catch all kind of exceptions and he provides code that works.
Here is the list you can catch:
SEH exception
terminate
unexpected
pure virtual method call
invalid parameter
new operator fault
SIGABR
SIGFPE
SIGILL
SIGINT
SIGSEGV
SIGTERM
Raised exception
C++ typed exception
And the usage: CCrashHandler ch; ch.SetProcessExceptionHandlers(); // do this for one thread ch.SetThreadExceptionHandlers(); // for each thred
By default, this creates a minidump in the current directory (crashdump.dmp)
For bootstrap datetimepicker
, assign decade
value as follow:
$(".years").datetimepicker({
format: "yyyy",
startView: 'decade',
minView: 'decade',
viewSelect: 'decade',
autoclose: true,
});
Declare where display: flex;
was given Element.
align-items: center;
Just use this constructor of List<T>
. It accepts any IEnumerable<T>
as an argument.
string[] arr = ...
List<string> list = new List<string>(arr);
As a workaround you could add a handler to the ServicePointManager
's ServerCertificateValidationCallback
on the client side:
System.Net.ServicePointManager.ServerCertificateValidationCallback +=
(se, cert, chain, sslerror) =>
{
return true;
};
but be aware that this is not a good practice as it completely ignores the server certificate and tells the service point manager that whatever certificate is fine which can seriously compromise client security. You could refine this and do some custom checking (for certificate name, hash etc). at least you can circumvent problems during development when using test certificates.
For me a typical while loop will be something like this:
xBool = True
# A counter to force a condition (eg. yCount = some integer value)
while xBool:
# set up the condition (eg. if yCount > 0):
(Do something)
yCount = yCount - 1
else:
# (condition is not met, set xBool False)
xBool = False
I could include a for..loop within the while loop as well, if situation so warrants, for looping through another set of condition.
input[name=username] { disabled: true; /* Does not work */ }
I know this question is quite old but for other users who come across this problem, I suppose the easiest way to disable input is simply by ':disabled'
<input type="text" name="username" value="admin" disabled />
<style type="text/css">
input[name=username]:disabled {
opacity: 0.5 !important; /* Fade effect */
cursor: not-allowed; /* Cursor change to disabled state*/
}
</style>
In reality, if you have some script to disable the input dynamically/automatically with javascript or jquery that would automatically disable based on the condition you add.
In jQuery for Example:
if (condition) {
// Make this input prop disabled state
$('input').prop('disabled', true);
}
else {
// Do something else
}
Hope the answer in CSS helps.
Have you tried to use CTRL-F5 to update the page?
For me, if I want to interact with the hidden div without seeing it disappear each time I leave the triggering element (a in that case) I must add:
div:hover {
display: block;
}
It's a bit late, but anyone else googling this page might be interested in this version -
If you want to clean up a chunk of pre-formatted text that a user may have cut & pasted into your app somehow, but preserve the word spacing, try this:
content = " a big nasty chunk of something
that's been pasted from a webpage or something and looks
like this
"
content.gsub(/\s+/, " ").strip
#=> "a big nasty chunk of something that's been pasted from a webpage or something and looks like this"
On the one hand, throwing exceptions is inherently expensive, because the stack has to be unwound etc.
On the other hand, accessing a value in a dictionary by its key is cheap, because it's a fast, O(1) operation.
BTW: The correct way to do this is to use TryGetValue
obj item;
if(!dict.TryGetValue(name, out item))
return null;
return item;
This accesses the dictionary only once instead of twice.
If you really want to just return null
if the key doesn't exist, the above code can be simplified further:
obj item;
dict.TryGetValue(name, out item);
return item;
This works, because TryGetValue
sets item
to null
if no key with name
exists.
The above answer for webkit appearance worked, but the button still looked kind pale/dull compared to the browser on other devices/desktop. I also had to set opacity to full (ranges from 0 to 1)
-webkit-appearance:none;
opacity: 1
After setting the opacity, the button looked the same on all the different devices/emulator/desktop.
I've compared the different options for speed and found that – much to my surprise – all options (except diag
) are equally fast. I personally use
A * b[:, None]
(or (A.T * b).T
) because it's short.
Code to reproduce the plot:
import numpy
import perfplot
def newaxis(data):
A, b = data
return A * b[:, numpy.newaxis]
def none(data):
A, b = data
return A * b[:, None]
def double_transpose(data):
A, b = data
return (A.T * b).T
def double_transpose_contiguous(data):
A, b = data
return numpy.ascontiguousarray((A.T * b).T)
def diag_dot(data):
A, b = data
return numpy.dot(numpy.diag(b), A)
def einsum(data):
A, b = data
return numpy.einsum("ij,i->ij", A, b)
perfplot.save(
"p.png",
setup=lambda n: (numpy.random.rand(n, n), numpy.random.rand(n)),
kernels=[
newaxis,
none,
double_transpose,
double_transpose_contiguous,
diag_dot,
einsum,
],
n_range=[2 ** k for k in range(13)],
xlabel="len(A), len(b)",
)
with navbar navbar-default everything works fine, but if you are using navbar-fixed-top you have to include custom style body { padding-top: 60px;} otherwise it will block content underneath.
Those CORS headers do not support *
as value, the only way is to replace *
with this:
Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With
.htaccess
Example (CORS Included):<IfModule mod_headers.c>
Header unset Connection
Header unset Time-Zone
Header unset Keep-Alive
Header unset Access-Control-Allow-Origin
Header unset Access-Control-Allow-Headers
Header unset Access-Control-Expose-Headers
Header unset Access-Control-Allow-Methods
Header unset Access-Control-Allow-Credentials
Header set Connection keep-alive
Header set Time-Zone "Asia/Jerusalem"
Header set Keep-Alive timeout=100,max=500
Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Headers "Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With"
Header set Access-Control-Expose-Headers "Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With"
Header set Access-Control-Allow-Methods "CONNECT, DEBUG, DELETE, DONE, GET, HEAD, HTTP, HTTP/0.9, HTTP/1.0, HTTP/1.1, HTTP/2, OPTIONS, ORIGIN, ORIGINS, PATCH, POST, PUT, QUIC, REST, SESSION, SHOULD, SPDY, TRACE, TRACK"
Header set Access-Control-Allow-Credentials "true"
Header set DNT "0"
Header set Accept-Ranges "bytes"
Header set Vary "Accept-Encoding"
Header set X-UA-Compatible "IE=edge,chrome=1"
Header set X-Frame-Options "SAMEORIGIN"
Header set X-Content-Type-Options "nosniff"
Header set X-Xss-Protection "1; mode=block"
</IfModule>
Why Access-Control-Allow-Headers
, Access-Control-Expose-Headers
, Access-Control-Allow-Methods
values are super long?
Those do not support the *
syntax, so I've collected the most common (and exotic) headers from around the web, in various formats #1 #2 #3 (and I will update the list from time to time)
Why do you use Header unset ______
syntax?
GoDaddy servers (which my website is hosted on..) have a weird bug where if the headers are already set, the previous value will join the existing one.. (instead of replacing it) this way I "pre-clean" existing values (really just a a quick && dirty solution)
Is it safe for me to use 'as-is'?
Well.. mostly the answer would be YES since the .htaccess
is limiting the headers to the scripts (PHP, HTML, ...) and resources (.JPG, .JS, .CSS) served from the following "folder"-location. You optionally might want to remove the Access-Control-Allow-Methods
lines. Also Connection
, Time-Zone
, Keep-Alive
and DNT
, Accept-Ranges
, Vary
, X-UA-Compatible
, X-Frame-Options
, X-Content-Type-Options
and X-Xss-Protection
are just a suggestion I'm using for my online-service.. feel free to remove those too...
taken from my comment above
Using official HTML without adding extra CSS styles and classes, it's like native support.
Just add the following code:
$.fn.dropdown = (function() {
var $bsDropdown = $.fn.dropdown;
return function(config) {
if (typeof config === 'string' && config === 'toggle') { // dropdown toggle trigged
$('.has-child-dropdown-show').removeClass('has-child-dropdown-show');
$(this).closest('.dropdown').parents('.dropdown').addClass('has-child-dropdown-show');
}
var ret = $bsDropdown.call($(this), config);
$(this).off('click.bs.dropdown'); // Turn off dropdown.js click event, it will call 'this.toggle()' internal
return ret;
}
})();
$(function() {
$('.dropdown [data-toggle="dropdown"]').on('click', function(e) {
$(this).dropdown('toggle');
e.stopPropagation();
});
$('.dropdown').on('hide.bs.dropdown', function(e) {
if ($(this).is('.has-child-dropdown-show')) {
$(this).removeClass('has-child-dropdown-show');
e.preventDefault();
}
e.stopPropagation();
});
});
Dropdown of bootstrap can be easily changed to infinite level. It's a pity that they didn't do it.
BTW, a hover version: https://github.com/dallaslu/bootstrap-4-multi-level-dropdown
Here is a perfect demo: https://jsfiddle.net/dallaslu/adky6jvs/ (works well with Bootstrap v4.4.1)
@media print
{
a[href]:after { content: none !important; }
img[src]:after { content: none !important; }
}
There's also a tool called pip-check
which gives you a quick overview of all installed packages and their update status:
Haven't used it myself; just stumbled upon it and this SO question in quick succession, and since it wasn't mentioned...
To get the currently logged in user:
System.getProperty("user.name"); //platform independent
and the hostname of the machine:
java.net.InetAddress localMachine = java.net.InetAddress.getLocalHost();
System.out.println("Hostname of local machine: " + localMachine.getHostName());
You can also check for socket output stream error while writing to client socket.
out.println(output);
if(out.checkError())
{
throw new Exception("Error transmitting data.");
}
You have to create your own player that interfaces with the HTML5 audio element. This tutorial will help http://alexkatz.me/html5-audio/building-a-custom-html5-audio-player-with-javascript/
You can use the parent selector reference &
, it will be replaced by the parent selector after compilation:
For your example:
.container {
background:red;
&.desc{
background:blue;
}
}
/* compiles to: */
.container {
background: red;
}
.container.desc {
background: blue;
}
The &
will completely resolve, so if your parent selector is nested itself, the nesting will be resolved before replacing the &
.
This notation is most often used to write pseudo-elements and -classes:
.element{
&:hover{ ... }
&:nth-child(1){ ... }
}
However, you can place the &
at virtually any position you like*, so the following is possible too:
.container {
background:red;
#id &{
background:blue;
}
}
/* compiles to: */
.container {
background: red;
}
#id .container {
background: blue;
}
However be aware, that this somehow breaks your nesting structure and thus may increase the effort of finding a specific rule in your stylesheet.
*: No other characters than whitespaces are allowed in front of the &
. So you cannot do a direct concatenation of selector
+&
- #id&
would throw an error.
item = objects.Find(obj => obj.property==myValue);
The padding inside a table-divider (TD) is a padding property applied to the cell itself.
CSS
td, th {padding:0}
The spacing in-between the table-dividers is a space between cell borders of the TABLE. To make it effective, you have to specify if your table cells borders will 'collapse' or be 'separated'.
CSS
table, td, th {border-collapse:separate}
table {border-spacing:6px}
Try this : https://www.google.ca/search?num=100&newwindow=1&q=css+table+cellspacing+cellpadding+site%3Astackoverflow.com ( 27 100 results )
Defining static properties and methods of a class is described in 8.2.1 of the Typescript Language Specification:
class Point {
constructor(public x: number, public y: number) {
throw new Error('cannot instantiate using a static class');
}
public distance(p: Point) {
var dx = this.x - p.x;
var dy = this.y - p.y;
return Math.sqrt(dx * dx + dy * dy);
}
static origin = new Point(0, 0);
static distance(p1: Point, p2: Point) {
return p1.distance(p2);
}
}
where Point.distance()
is a static (or "class") method.
For those receiving this warning for the first time, it is due to a bleeding edge feature called Passive Event Listeners that has been implemented in browsers fairly recently (summer 2016). From https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md:
Passive event listeners are a new feature in the DOM spec that enable developers to opt-in to better scroll performance by eliminating the need for scrolling to block on touch and wheel event listeners. Developers can annotate touch and wheel listeners with {passive: true} to indicate that they will never invoke preventDefault. This feature shipped in Chrome 51, Firefox 49 and landed in WebKit. For full official explanation read more here.
See also: What are passive event listeners?
If you are handling events indirectly via a JavaScript library, you may be at the mercy of that particular library's support for the feature. As of December 2019, it does not look like any of the major libraries have implemented support. Some examples:
I wonder why nobody mentioned the Minted package. It has far better syntax highlighting than the LaTeX listing package. It uses Pygments.
$ pip install Pygments
Example in LaTeX:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{minted}
\begin{document}
\begin{minted}{python}
import numpy as np
def incmatrix(genl1,genl2):
m = len(genl1)
n = len(genl2)
M = None #to become the incidence matrix
VT = np.zeros((n*m,1), int) #dummy variable
#compute the bitwise xor matrix
M1 = bitxormatrix(genl1)
M2 = np.triu(bitxormatrix(genl2),1)
for i in range(m-1):
for j in range(i+1, m):
[r,c] = np.where(M2 == M1[i,j])
for k in range(len(r)):
VT[(i)*n + r[k]] = 1;
VT[(i)*n + c[k]] = 1;
VT[(j)*n + r[k]] = 1;
VT[(j)*n + c[k]] = 1;
if M is None:
M = np.copy(VT)
else:
M = np.concatenate((M, VT), 1)
VT = np.zeros((n*m,1), int)
return M
\end{minted}
\end{document}
Which results in:
You need to use the flag -shell-escape
with the pdflatex command.
For more information: https://www.sharelatex.com/learn/Code_Highlighting_with_minted
There is no easy way to emulate fork() on Windows.
I suggest you to use threads instead.
The problem is described (among other) in this article.
#box
is relatively positioned, which makes it part of the "flow" of the page. Your other divs are absolutely positioned, so they are removed from the page's "flow".
Page flow means that the positioning of an element effects other elements in the flow.
In other words, as #box
now sees the dom, .a and .b are no longer "inside" #box
.
To fix this, you would want to make everything relative, or everything absolute.
One way would be:
.a {
position:relative;
margin-top:10px;
margin-left:10px;
background-color:red;
width:210px;
padding: 5px;
}
Unless your application has specially needs, I think you have 2 approaches:
Session is not only thread-safe but also state-safe, in a way that you know that until the current request is completed, every session variable wont change from another active request. In order for this to happen you must ensure that session WILL BE LOCKED until the current request have completed.
You can create a session like behavior by many ways, but if it does not lock the current session, it wont be 'session'.
For the specific problems you mentioned I think you should check HttpContext.Current.Response.IsClientConnected. This can be useful to to prevent unnecessary executions and waits on the client, although it cannot solve this problem entirely, as this can be used only by a pooling way and not async.
Use line-height:50px;
instead of height. That should do the trick ;)
The way you are performing the injection of the property will not work, because the injection is done after the constructor is called.
You need to do one of the following:
Better solution
@Component
public class MyBean {
private final String prop;
@Autowired
public MyBean(@Value("${some.prop}") String prop) {
this.prop = prop;
System.out.println("================== " + prop + "================== ");
}
}
Solution that will work but is less testable and slightly less readable
@Component
public class MyBean {
@Value("${some.prop}")
private String prop;
public MyBean() {
}
@PostConstruct
public void init() {
System.out.println("================== " + prop + "================== ");
}
}
Also note that is not Spring Boot specific but applies to any Spring application
It's best practice only to escape the quotes when you need to - if you can get away without escaping it, then do!
The only times you should need to escape are when trying to put "
inside a string, or '
in a character:
String quotes = "He said \"Hello, World!\"";
char quote = '\'';
For swedish Å Ä Ö the only solution form the ones above working was:
Encoding.GetEncoding("iso-8859-1")
Hopefully this will save someone time.
You can even install GitHub on your local server (but not for free):
You are copying singleton's customVar
into a singletonVar
variable and changing that variable does not affect the original value in singleton.
// This does not update singleton variable
// It just assigns value of your local variable
Log.d("Test",singletonVar);
singletonVar="World";
Log.d("Test",singletonVar);
// This actually assigns value of variable in singleton
Singleton.customVar = singletonVar;
As this is a very frequently asked question, I wanted to take the time and effort to explain the ViewPager with multiple Fragments and Layouts in detail. Here you go.
The following is a complete example of how to implement a ViewPager with different fragment Types and different layout files.
In this case, I have 3 Fragment classes, and a different layout file for each class. In order to keep things simple, the fragment-layouts only differ in their background color. Of course, any layout-file can be used for the Fragments.
FirstFragment.java has a orange background layout, SecondFragment.java has a green background layout and ThirdFragment.java has a red background layout. Furthermore, each Fragment displays a different text, depending on which class it is from and which instance it is.
Also be aware that I am using the support-library's Fragment: android.support.v4.app.Fragment
MainActivity.java (Initializes the Viewpager and has the adapter for it as an inner class). Again have a look at the imports. I am using the android.support.v4
package.
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewPager pager = (ViewPager) findViewById(R.id.viewPager);
pager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
}
private class MyPagerAdapter extends FragmentPagerAdapter {
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int pos) {
switch(pos) {
case 0: return FirstFragment.newInstance("FirstFragment, Instance 1");
case 1: return SecondFragment.newInstance("SecondFragment, Instance 1");
case 2: return ThirdFragment.newInstance("ThirdFragment, Instance 1");
case 3: return ThirdFragment.newInstance("ThirdFragment, Instance 2");
case 4: return ThirdFragment.newInstance("ThirdFragment, Instance 3");
default: return ThirdFragment.newInstance("ThirdFragment, Default");
}
}
@Override
public int getCount() {
return 5;
}
}
}
activity_main.xml (The MainActivitys .xml file) - a simple layout file, only containing the ViewPager that fills the whole screen.
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/viewPager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
The Fragment classes, FirstFragment.java import android.support.v4.app.Fragment;
public class FirstFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.first_frag, container, false);
TextView tv = (TextView) v.findViewById(R.id.tvFragFirst);
tv.setText(getArguments().getString("msg"));
return v;
}
public static FirstFragment newInstance(String text) {
FirstFragment f = new FirstFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}
}
first_frag.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_orange_dark" >
<TextView
android:id="@+id/tvFragFirst"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textSize="26dp"
android:text="TextView" />
</RelativeLayout>
SecondFragment.java
public class SecondFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.second_frag, container, false);
TextView tv = (TextView) v.findViewById(R.id.tvFragSecond);
tv.setText(getArguments().getString("msg"));
return v;
}
public static SecondFragment newInstance(String text) {
SecondFragment f = new SecondFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}
}
second_frag.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_green_dark" >
<TextView
android:id="@+id/tvFragSecond"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textSize="26dp"
android:text="TextView" />
</RelativeLayout>
ThirdFragment.java
public class ThirdFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.third_frag, container, false);
TextView tv = (TextView) v.findViewById(R.id.tvFragThird);
tv.setText(getArguments().getString("msg"));
return v;
}
public static ThirdFragment newInstance(String text) {
ThirdFragment f = new ThirdFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}
}
third_frag.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_red_light" >
<TextView
android:id="@+id/tvFragThird"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textSize="26dp"
android:text="TextView" />
</RelativeLayout>
The end result is the following:
The Viewpager holds 5 Fragments, Fragments 1 is of type FirstFragment, and displays the first_frag.xml layout, Fragment 2 is of type SecondFragment and displays the second_frag.xml, and Fragment 3-5 are of type ThirdFragment and all display the third_frag.xml.
Above you can see the 5 Fragments between which can be switched via swipe to the left or right. Only one Fragment can be displayed at the same time of course.
Last but not least:
I would recommend that you use an empty constructor in each of your Fragment classes.
Instead of handing over potential parameters via constructor, use the newInstance(...)
method and the Bundle
for handing over parameters.
This way if detached and re-attached the object state can be stored through the arguments. Much like Bundles
attached to Intents
.
Slightly different from what you described, but I think this might be what you actually need:
svn blame filename
It will print the file with each line prefixed by the time and author of the commit that last changed it.
Like Robin Winslow says in a comment :
I found my solution over here: stackoverflow.com/a/5178444/613540
In my case, my complete error message was :
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
error: Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
I was trying to install torrench :
sudo python3 setup.py install
With given stackoverflow link, I solve this issue by :
sudo apt install zlib1g-dev
Note that the following packages were already installed :
libxslt1-dev is already the newest version.
python3-dev is already the newest version.
libxml2-dev is already the newest version.
Hope that will help !
I think you want something like
var count = context.MyTable.Count(t => t.MyContainer.ID == '1');
(edited to reflect comments)
With the v3 API, you can easily close the InfoWindow
with the InfoWindow.close()
method. You simply need to keep a reference to the InfoWindow
object that you are using. Consider the following example, which opens up an InfoWindow
and closes it after 5 seconds:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API InfoWindow Demo</title>
<script src="http://maps.google.com/maps/api/js?sensor=false"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 400px; height: 500px;"></div>
<script type="text/javascript">
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: new google.maps.LatLng(-25.36388, 131.04492),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
position: map.getCenter(),
map: map
});
var infowindow = new google.maps.InfoWindow({
content: 'An InfoWindow'
});
infowindow.open(map, marker);
setTimeout(function () { infowindow.close(); }, 5000);
</script>
</body>
</html>
If you have a separate InfoWindow
object for each Marker
, you may want to consider adding the InfoWindow
object as a property of your Marker
objects:
var marker = new google.maps.Marker({
position: map.getCenter(),
map: map
});
marker.infowindow = new google.maps.InfoWindow({
content: 'An InfoWindow'
});
Then you would be able to open and close that InfoWindow
as follows:
marker.infowindow.open(map, marker);
marker.infowindow.close();
The same applies if you have an array of markers:
var markers = [];
marker[0] = new google.maps.Marker({
position: map.getCenter(),
map: map
});
marker[0].infowindow = new google.maps.InfoWindow({
content: 'An InfoWindow'
});
// ...
marker[0].infowindow.open(map, marker);
marker[0].infowindow.close();
The answers here are lacking in clarity, this is tested on Python 3.6
With this folder structure:
main.py
|
---- myfolder/myfile.py
Where myfile.py
has the content:
def myfunc():
print('hello')
The import statement in main.py
is:
from myfolder.myfile import myfunc
myfunc()
and this will print hello.
Solution Steps:
Unchecked "Automatically manage signing".
Select "Provisioning profile" in "Signing (Release)" section.
No signing certificate error will be show.
Then below the error has a "Manage Certificates" button. click the button.
I assume that you use distinct like a method call on a list. You need to use the result of the query as datasource for your DropDownList, for example by materializing it via ToList
.
var distinctCategories = product
.Select(m => new {m.CategoryId, m.CategoryName})
.Distinct()
.ToList();
DropDownList1.DataSource = distinctCategories;
DropDownList1.DataTextField = "CategoryName";
DropDownList1.DataValueField = "CategoryId";
Another way if you need the real objects instead of the anonymous type with only few properties is to use GroupBy
with an anonymous type:
List<Product> distinctProductList = product
.GroupBy(m => new {m.CategoryId, m.CategoryName})
.Select(group => group.First()) // instead of First you can also apply your logic here what you want to take, for example an OrderBy
.ToList();
A third option is to use MoreLinq's DistinctBy
.
The short answer is: don't. If you want code that reads linearly, use a library like seq. But just don't expect synchronous. You really can't. And that's a good thing.
There's little or nothing that can't be put in a callback. If they depend on common variables, create a closure to contain them. What's the actual task at hand?
You'd want to have a counter, and only call the callback when the data is there:
var waiting = 2;
request( {url: base + u_ext}, function( err, res, body ) {
var split1 = body.split("\n");
var split2 = split1[1].split(", ");
ucomp = split2[1];
if(--waiting == 0) callback();
});
request( {url: base + v_ext}, function( err, res, body ) {
var split1 = body.split("\n");
var split2 = split1[1].split(", ");
vcomp = split2[1];
if(--waiting == 0) callback();
});
function callback() {
// do math here.
}
Update 2018: node.js supports async/await keywords in recent editions, and with libraries that represent asynchronous processes as promises, you can await them. You get linear, sequential flow through your program, and other work can progress while you await. It's pretty well built and worth a try.
Select Distinct CAST(FLOOR( CAST(start_date AS FLOAT ) )AS DATETIME) from Table
I know this is an old post but I recently ran into a very similar problem. Unfortunately I wasn't able to use any of the alter database commands because an exclusive lock couldn't be placed. But I was never able to find an open connection to the db. I eventually had to forcefully delete the health state of the database to force it into a restoring state instead of in recovery.
Use the timestamp you get by calling valueOf
on the date object:
var diff = date2.valueOf() - date1.valueOf();
var diffInHours = diff/1000/60/60; // Convert milliseconds to hours
Wrap the code in document ready and prevent the default submit action:
$(function() { //shorthand document.ready function
$('#login_form').on('submit', function(e) { //use on if jQuery 1.7+
e.preventDefault(); //prevent form from submitting
var data = $("#login_form :input").serializeArray();
console.log(data); //use the console for debugging, F12 in Chrome, not alerts
});
});
SQL Server drops and recreates the tables only if you:
Using ALTER is safer, as in case the metadata is lost while you re-create the table, your data will be lost.
You can get all matches in a file simply by assigning inside while-loop, cool:
$ javac MatchTest.java
$ java MatchTest
1
16
31
46
$ cat MatchTest.java
import java.util.*;
import java.io.*;
public class MatchTest {
public static void main(String[] args){
String match = "hello";
String text = "hello0123456789hello0123456789hello1234567890hello3423243423232";
int i =0;
while((i=(text.indexOf(match,i)+1))>0)
System.out.println(i);
}
}
On Mac (osx), I generated two .sh files, one for the first publication and another one for updating :
#!/bin/sh
echo "Ionic to Signed APK ---- [email protected] // Benjamin Rathelot\n"
printf "Project dir : "
read DIR
printf "Project key alias : "
read ALIAS
cd $DIR/
cordova build --release android
cd platforms/android/build/outputs/apk/
keytool -genkey -v -keystore my-release-key.keystore -alias $ALIAS -keyalg RSA -keysize 2048 -validity 10000
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore android-release-unsigned.apk $ALIAS
zipalign -v 4 android-release-unsigned.apk signedApk.apk
And to update your app:
#!/bin/sh
echo "Ionic to Signed APK ---- [email protected] // Benjamin Rathelot\n"
printf "Project dir : "
read DIR
printf "Project key alias : "
read ALIAS
cd $DIR/
cordova build --release android
cd platforms/android/build/outputs/apk/
rm signedApk.apk
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore android-release-unsigned.apk $ALIAS
zipalign -v 4 android-release-unsigned.apk signedApk.apk
Assuming you're in your home folder or a folder topping your apps folders. Make sure to set correctly chmod to use this script. Then :
./ionicToApk.sh # or whatever depending of the name of your file, in CLI
Your signed apk will be in Your App folder/platforms/android/build/outputs/apk/ as SignedApk.apk Make sure to use the correct key alias and password defined with the first script
Include the System.DirectoryServices.dll, then use the code below:
DirectoryEntry directoryEntry = new DirectoryEntry("WinNT://" + Environment.MachineName);
string userNames="Users: ";
foreach (DirectoryEntry child in directoryEntry.Children)
{
if (child.SchemaClassName == "User")
{
userNames += child.Name + Environment.NewLine ;
}
}
MessageBox.Show(userNames);
There is also a descent solution which seems not to have any memory or performance overhead and be quite elegant:
string[] filters = new[]{"*.jpg", "*.png", "*.gif"};
string[] filePaths = filters.SelectMany(f => Directory.GetFiles(basePath, f)).ToArray();
within(df, rm(x))
is probably easiest, or for multiple variables:
within(df, rm(x, y))
Or if you're dealing with data.table
s (per How do you delete a column by name in data.table?):
dt[, x := NULL] # Deletes column x by reference instantly.
dt[, !"x"] # Selects all but x into a new data.table.
or for multiple variables
dt[, c("x","y") := NULL]
dt[, !c("x", "y")]
You cannot concatenate multiple fields with a string. You need to select a field instand of all (*
).
ColumnNames
is a property of type List<String>
so when you are setting up you need to pass a List<String>
in the Returns
call as an argument (or a func which return a List<String>
)
But with this line you are trying to return just a string
input.SetupGet(x => x.ColumnNames).Returns(temp[0]);
which is causing the exception.
Change it to return whole list:
input.SetupGet(x => x.ColumnNames).Returns(temp);
My solution is a bit funny.I never thought that would it be as easy as save as with UTF-8 codec.I'm using notepad++(v5.6.8).I didn't notice that I saved it with ANSI codec initially. I'm using separate file to place all localized dictionary. I found my solution under 'Encoding' tab from my Notepad++.I select 'Encoding in UTF-8 without BOM' and save it. It works brilliantly.
Here is a site with a clear explanation and graphical illustration of using git merge --no-ff
:
Until I saw this, I was completely lost with git. Using --no-ff
allows someone reviewing history to clearly see the branch you checked out to work on. (that link points to github's "network" visualization tool) And here is another great reference with illustrations. This reference complements the first one nicely with more of a focus on those less acquainted with git.
If you are like me, and not a Git-guru, my answer here describes handling the deletion of files from git's tracking without deleting them from the local filesystem, which seems poorly documented but often occurrence. Another newb situation is getting current code, which still manages to elude me.
I updated a package to my website and had to go back to my notes to see my workflow; I thought it useful to add an example to this answer.
My workflow of git commands:
git checkout -b contact-form
(do your work on "contact-form")
git status
git commit -am "updated form in contact module"
git checkout master
git merge --no-ff contact-form
git branch -d contact-form
git push origin master
Below: actual usage, including explanations.
Note: the output below is snipped; git is quite verbose.
$ git status
# On branch master
# Changed but not updated:
# (use "git add/rm <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: ecc/Desktop.php
# modified: ecc/Mobile.php
# deleted: ecc/ecc-config.php
# modified: ecc/readme.txt
# modified: ecc/test.php
# deleted: passthru-adapter.igs
# deleted: shop/mickey/index.php
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# ecc/upgrade.php
# ecc/webgility-config.php
# ecc/webgility-config.php.bak
# ecc/webgility-magento.php
Notice 3 things from above:
1) In the output you can see the changes from the ECC package's upgrade, including the addition of new files.
2) Also notice there are two files (not in the /ecc
folder) I deleted independent of this change. Instead of confusing those file deletions with ecc
, I'll make a different cleanup
branch later to reflect those files' deletion.
3) I didn't follow my workflow! I forgot about git while I was trying to get ecc working again.
Below: rather than do the all-inclusive git commit -am "updated ecc package"
I normally would, I only wanted to add the files in the /ecc
folder. Those deleted files weren't specifically part of my git add
, but because they already were tracked in git, I need to remove them from this branch's commit:
$ git checkout -b ecc
$ git add ecc/*
$ git reset HEAD passthru-adapter.igs
$ git reset HEAD shop/mickey/index.php
Unstaged changes after reset:
M passthru-adapter.igs
M shop/mickey/index.php
$ git commit -m "Webgility ecc desktop connector files; integrates with Quickbooks"
$ git checkout master
D passthru-adapter.igs
D shop/mickey/index.php
Switched to branch 'master'
$ git merge --no-ff ecc
$ git branch -d ecc
Deleted branch ecc (was 98269a2).
$ git push origin master
Counting objects: 22, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (14/14), done.
Writing objects: 100% (14/14), 59.00 KiB, done.
Total 14 (delta 10), reused 0 (delta 0)
To [email protected]:me/mywebsite.git
8a0d9ec..333eff5 master -> master
Having used this process 10+ times in a day, I have taken to writing batch scripts to execute the commands, so I made an almost-proper git_update.sh <branch> <"commit message">
script for doing the above steps. Here is the Gist source for that script.
Instead of git commit -am
I am selecting files from the "modified" list produced via git status
and then pasting those in this script. This came about because I made dozens of edits but wanted varied branch names to help group the changes.
Just use crontab -e
and follow the tutorial here.
Look at point 3 for a guide on how to specify the frequency.
Based on your requirement, it should effectively be:
*/10 * * * * /usr/bin/python script.py
This worked for me from within Fragment:
Fragment frg = null;
Class fragmentClass;
fragmentClass = MainFragment.class;
try {
frg = (android.support.v4.app.Fragment)
fragmentClass.newInstance();
} catch(Exception ex) {
ex.printStackTrace();
}
getFragmentManager()
.beginTransaction()
.replace(R.id.flContent, frg)
.commit();
Starting from AngularJS 1.3 there's a new method called $watchGroup
for observing a set of expressions.
$scope.foo = 'foo';
$scope.bar = 'bar';
$scope.$watchGroup(['foo', 'bar'], function(newValues, oldValues, scope) {
// newValues array contains the current values of the watch expressions
// with the indexes matching those of the watchExpression array
// i.e.
// newValues[0] -> $scope.foo
// and
// newValues[1] -> $scope.bar
});
Using perl rename (a must have in the toolbox):
rename -n 's/0000/000/' F0000*
Remove -n
switch when the output looks good to rename for real.
There are other tools with the same name which may or may not be able to do this, so be careful.
The rename command that is part of the util-linux
package, won't.
If you run the following command (GNU
)
$ rename
and you see perlexpr
, then this seems to be the right tool.
If not, to make it the default (usually already the case) on Debian
and derivative like Ubuntu
:
$ sudo apt install rename
$ sudo update-alternatives --set rename /usr/bin/file-rename
For archlinux:
pacman -S perl-rename
For RedHat-family distros:
yum install prename
The 'prename' package is in the EPEL repository.
For Gentoo:
emerge dev-perl/rename
For *BSD:
pkg install gprename
or p5-File-Rename
For Mac users:
brew install rename
If you don't have this command with another distro, search your package manager to install it or do it manually:
cpan -i File::Rename
Old standalone version can be found here
This tool was originally written by Larry Wall, the Perl's dad.
I'm not sure if you need source code. There is a free online JavaScript formatter at http://www.blackbeltcoder.com/Resources/JSFormatter.aspx.
In SQL 2005, you first need to show the Database Name column in your trace. The easiest thing to do is to pick the Tuning template, which has that column added already.
Assuming you have the Tuning template selected, to filter:
I always save the trace to a table too so I can do LIKE queries on the trace data after the fact.
The results from json.Unmarshal
(into var data interface{}
) do not directly match your Go type and variable declarations. For example,
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
)
type Tracks struct {
Toptracks []Toptracks_info
}
type Toptracks_info struct {
Track []Track_info
Attr []Attr_info
}
type Track_info struct {
Name string
Duration string
Listeners string
Mbid string
Url string
Streamable []Streamable_info
Artist []Artist_info
Attr []Track_attr_info
}
type Attr_info struct {
Country string
Page string
PerPage string
TotalPages string
Total string
}
type Streamable_info struct {
Text string
Fulltrack string
}
type Artist_info struct {
Name string
Mbid string
Url string
}
type Track_attr_info struct {
Rank string
}
func get_content() {
// json data
url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=Netherlands"
url += "&limit=1" // limit data for testing
res, err := http.Get(url)
if err != nil {
panic(err.Error())
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
panic(err.Error())
}
var data interface{} // TopTracks
err = json.Unmarshal(body, &data)
if err != nil {
panic(err.Error())
}
fmt.Printf("Results: %v\n", data)
os.Exit(0)
}
func main() {
get_content()
}
Output:
Results: map[toptracks:map[track:map[name:Get Lucky (feat. Pharrell Williams) listeners:1863 url:http://www.last.fm/music/Daft+Punk/_/Get+Lucky+(feat.+Pharrell+Williams) artist:map[name:Daft Punk mbid:056e4f3e-d505-4dad-8ec1-d04f521cbb56 url:http://www.last.fm/music/Daft+Punk] image:[map[#text:http://userserve-ak.last.fm/serve/34s/88137413.png size:small] map[#text:http://userserve-ak.last.fm/serve/64s/88137413.png size:medium] map[#text:http://userserve-ak.last.fm/serve/126/88137413.png size:large] map[#text:http://userserve-ak.last.fm/serve/300x300/88137413.png size:extralarge]] @attr:map[rank:1] duration:369 mbid: streamable:map[#text:1 fulltrack:0]] @attr:map[country:Netherlands page:1 perPage:1 totalPages:500 total:500]]]
You've nearly got it:
DECLARE @myVariable nvarchar(max) = 'hello world';
See here for the docs
For the quotes, SQL Server uses apostrophes, not quotes:
DECLARE @myVariable nvarchar(max) = 'John said to Emily "Hey there Emily"';
Use double apostrophes if you need them in a string:
DECLARE @myVariable nvarchar(max) = 'John said to Emily ''Hey there Emily''';
It seems like it exists a bug in jQuery reported here : http://bugs.jquery.com/ticket/13183 that breaks the Fancybox script.
Also check https://github.com/fancyapps/fancyBox/issues/485 for further reference.
As a workaround, rollback to jQuery v1.8.3 while either the jQuery bug is fixed or Fancybox is patched.
UPDATE (Jan 16, 2013): Fancybox v2.1.4 has been released and now it works fine with jQuery v1.9.0.
For fancybox v1.3.4- you still need to rollback to jQuery v1.8.3 or apply the migration script as pointed out by @Manu's answer.
UPDATE (Jan 17, 2013): Workaround for users of Fancybox v1.3.4 :
Patch the fancybox js file to make it work with jQuery v1.9.0 as follow :
Find around the line 29 where it says :
isIE6 = $.browser.msie && $.browser.version < 7 && !window.XMLHttpRequest,
and replace it by (EDITED March 19, 2013: more accurate filter):
isIE6 = navigator.userAgent.match(/msie [6]/i) && !window.XMLHttpRequest,
UPDATE (March 19, 2013): Also replace $.browser.msie
by navigator.userAgent.match(/msie [6]/i)
around line 615 (and/or replace all $.browser.msie
instances, if any), thanks joofow
... that's it!
Or download the already patched version from HERE (UPDATED March 19, 2013 ... thanks fairylee for pointing out the extra closing bracket)
NOTE: this is an unofficial patch and is unsupported by Fancybox's author, however it works as is. You may use it at your own risk ;)
Optionally, you may rather rollback to jQuery v1.8.3 or apply the migration script as pointed out by @Manu's answer.
I use:
var lastPart = path.replace(/\\$/,'').split('\\').pop();
It replaces the last \
so it also works with folders.
You should change the query to:
SELECT time_col, COUNT(time_col) As Count
FROM time_table
WHERE activity_col = 3
GROUP BY time_col
This vl works correctly.
Have you instaled the J2EE? If you installed just de standard (J2SE) it won´t find.
THIS ANSWER IS NO LONGER ACCURATE AS THE YAHOO FEED HAS CEASED TO EXIST
Using Yahoo's CSV approach above you can also get historical data! You can reverse engineer the following example:
http://ichart.finance.yahoo.com/table.csv?s=YHOO&d=0&e=28&f=2010&g=d&a=3&b=12&c=1996&ignore=.csv
Essentially:
sn = TICKER
a = fromMonth-1
b = fromDay (two digits)
c = fromYear
d = toMonth-1
e = toDay (two digits)
f = toYear
g = d for day, m for month, y for yearly
The complete list of parameters:
a Ask
a2 Average Daily Volume
a5 Ask Size
b Bid
b2 Ask (Real-time)
b3 Bid (Real-time)
b4 Book Value
b6 Bid Size
c Change & Percent Change
c1 Change
c3 Commission
c6 Change (Real-time)
c8 After Hours Change (Real-time)
d Dividend/Share
d1 Last Trade Date
d2 Trade Date
e Earnings/Share
e1 Error Indication (returned for symbol changed / invalid)
e7 EPS Estimate Current Year
e8 EPS Estimate Next Year
e9 EPS Estimate Next Quarter
f6 Float Shares
g Day's Low
h Day's High
j 52-week Low
k 52-week High
g1 Holdings Gain Percent
g3 Annualized Gain
g4 Holdings Gain
g5 Holdings Gain Percent (Real-time)
g6 Holdings Gain (Real-time)
i More Info
i5 Order Book (Real-time)
j1 Market Capitalization
j3 Market Cap (Real-time)
j4 EBITDA
j5 Change From 52-week Low
j6 Percent Change From 52-week Low
k1 Last Trade (Real-time) With Time
k2 Change Percent (Real-time)
k3 Last Trade Size
k4 Change From 52-week High
k5 Percent Change From 52-week High
l Last Trade (With Time)
l1 Last Trade (Price Only)
l2 High Limit
l3 Low Limit
m Day's Range
m2 Day's Range (Real-time)
m3 50-day Moving Average
m4 200-day Moving Average
m5 Change From 200-day Moving Average
m6 Percent Change From 200-day Moving Average
m7 Change From 50-day Moving Average
m8 Percent Change From 50-day Moving Average
n Name
n4 Notes
o Open
p Previous Close
p1 Price Paid
p2 Change in Percent
p5 Price/Sales
p6 Price/Book
q Ex-Dividend Date
r P/E Ratio
r1 Dividend Pay Date
r2 P/E Ratio (Real-time)
r5 PEG Ratio
r6 Price/EPS Estimate Current Year
r7 Price/EPS Estimate Next Year
s Symbol
s1 Shares Owned
s7 Short Ratio
t1 Last Trade Time
t6 Trade Links
t7 Ticker Trend
t8 1 yr Target Price
v Volume
v1 Holdings Value
v7 Holdings Value (Real-time)
w 52-week Range
w1 Day's Value Change
w4 Day's Value Change (Real-time)
x Stock Exchange
y Dividend Yield
(\d+)\s+(\(.*?\))?\s?Z
Note the escaped parentheses, and the ?
(zero or once) quantifiers. Any of the groups you don't want to capture can be (?:
non-capture groups).
I agree about the spaces. \s
is a better option there. I also changed the quantifier to insure there are digits at the beginning. As far as newlines, that would depend on context: if the file is parsed line by line it won't be a problem. Another option is to anchor the start and end of the line (add a ^
at the front and a $
at the end).
An array has a fixed length. You cannot 'add' to it. You define at the start how long it will be.
int[] num = new int[5];
This creates an array of integers which has 5 'buckets'. Each bucket contains 1 integer. To begin with these will all be 0
.
num[0] = 1;
num[1] = 2;
The two lines above set the first and second values of the array to 1
and 2
. Now your array looks like this:
[1,2,0,0,0]
As you can see you set values in it, you don't add them to the end.
If you want to be able to create a list of numbers which you add to, you should use ArrayList.
Use queue.rear+1
to get the length of the queue
Not sure if this is the most efficient way, but:
>>> ''.join(c for c in "abc123def456" if c.isdigit())
'123456'
The ''.join
part means to combine all the resulting characters together without any characters in between. Then the rest of it is a list comprehension, where (as you can probably guess) we only take the parts of the string that match the condition isdigit
.
Without using an overlay, you can use pointer-events: none
on the div
in CSS, but this does not work in IE or Opera.
div.disabled
{
pointer-events: none;
/* for "disabled" effect */
opacity: 0.5;
background: #CCC;
}
You can use
targetElement.insertAdjacentElement('afterbegin', newFirstElement)
From MDN :
The insertAdjacentElement() method inserts a given element node at a given position relative to the element it is invoked upon.
position
A DOMString representing the position relative to the element; must be one of the following strings:
beforebegin
: Before the element itself.
afterbegin
: Just inside the element, before its first child.
beforeend
: Just inside the element, after its last child.
afterend
: After the element itself.element
The element to be inserted into the tree.
Also in the family of insertAdjacent
there is the sibling methods:
element.insertAdjacentHTML('afterbegin','htmlText')
for inject html string directly, like innerHTML
but without overide everything , so you can jump oppressive process of document.createElement
and even build whole componet with string manipulation process
element.insertAdjacentText
for inject sanitize string into element . no more encode/decode
In oracle db there is a trick for casting int to float (I suppose, it should also work in mysql):
select myintfield + 0.0 as myfloatfield from mytable
While @Heximal's answer works, I don't personally recommend it.
This is because it uses implicit casting. Although you didn't type CAST
, either the SUM()
or the 0.0
need to be cast to be the same data-types, before the +
can happen. In this case the order of precedence is in your favour, and you get a float on both sides, and a float as a result of the +
. But SUM(aFloatField) + 0
does not yield an INT, because the 0
is being implicitly cast to a FLOAT.
I find that in most programming cases, it is much preferable to be explicit. Don't leave things to chance, confusion, or interpretation.
If you want to be explicit, I would use the following.
CAST(SUM(sl.parts) AS FLOAT) * cp.price
-- using MySQL CAST FLOAT requires 8.0
You can try the following to see what happens...
CAST(SUM(sl.parts) AS NUMERIC(10,4)) * CAST(cp.price AS NUMERIC(10,4))
DECLARE @FromDate DATETIME
SET @FromDate = 'Jan 10 2016 12:00AM'
DECLARE @ToDate DATETIME
SET @ToDate = 'Jan 10 2017 12:00AM'
DECLARE @Dynamic_Qry nvarchar(Max) =''
SET @Dynamic_Qry='SELECT
(CONVERT(DATETIME,(SELECT
CASE WHEN ( ''IssueDate'' =''IssueDate'') THEN
EMP_DOCUMENT.ISSUE_DATE
WHEN (''IssueDate'' =''ExpiryDate'' ) THEN
EMP_DOCUMENT.EXPIRY_DATE ELSE EMP_DOCUMENT.APPROVED_ON END
CHEKDATE ), 101)
)FROM CR.EMP_DOCUMENT as EMP_DOCUMENT WHERE 1=1
AND (
CONVERT(DATETIME,(SELECT
CASE WHEN ( ''IssueDate'' =''IssueDate'') THEN
EMP_DOCUMENT.ISSUE_DATE
WHEN (''IssueDate'' =''ExpiryDate'' ) THEN EMP_DOCUMENT.EXPIRY_DATE
ELSE EMP_DOCUMENT.APPROVED_ON END
CHEKDATE ), 101)
) BETWEEN '''+ CONVERT(CHAR(10), @FromDate, 126) +''' AND '''+CONVERT(CHAR(10), @ToDate , 126
)
+'''
'
print @Dynamic_Qry
EXEC(@Dynamic_Qry)
Happened in docker (node:15-buster) for me.
Remember to use WORKDIR /<folder>
so that it doesn't conflict with original npm libraries installed.
The folder can be anything but system folders, so that includes using /
.
GCC 4.9 introduces a newer C++ ABI version than your system libstdc++ has, so you need to tell the loader to use this newer version of the library by adding that path to LD_LIBRARY_PATH
. Unfortunately, I cannot tell you straight off where the libstdc++ so for your GCC 4.9 installation is located, as this depends on how you configured GCC. So you need something in the style of:
export LD_LIBRARY_PATH=/home/user/lib/gcc-4.9.0/lib:/home/user/lib/boost_1_55_0/stage/lib:$LD_LIBRARY_PATH
Note the actual path may be different (there might be some subdirectory hidden under there, like `x86_64-unknown-linux-gnu/4.9.0´ or similar).
SQL injection is the attempt to issue SQL commands to a database through a website interface, to gain other information. Namely, this information is stored database information such as usernames and passwords.
First rule of securing any script or page that attaches to a database instance is Do not trust user input.
Your example is attempting to end a misquoted string in an SQL statement. To understand this, you first need to understand SQL statements. In your example of adding a '
to a paramater, your 'injection' is hoping for the following type of statement:
SELECT username,password FROM users WHERE username='$username'
By appending a '
to that statement, you could then add additional SQL paramaters or queries.: ' OR username --
SELECT username,password FROM users WHERE username='' OR username -- '$username
That is an injection (one type of; Query Reshaping). The user input becomes an injected statement into the pre-written SQL statement.
Generally there are three types of SQL injection methods:
Read up on SQL Injection, How to test for vulnerabilities, understanding and overcoming SQL injection, and this question (and related ones) on StackOverflow about avoiding injections.
Edit:
As far as TESTING your site for SQL injection, understand it gets A LOT more complex than just 'append a symbol'. If your site is critical, and you (or your company) can afford it, hire a professional pen tester. Failing that, this great exaxmple/proof can show you some common techniques one might use to perform an injection test. There is also SQLMap which can automate some tests for SQL Injection and database take over scenarios.
There are lot of different Timers in the .NET BCL:
When to use which?
System.Timers.Timer
, which fires an event and executes the code in one or more event sinks at regular intervals. The class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.System.Threading.Timer
, which executes a single callback method on a thread pool thread at regular intervals. The callback method is defined when the timer is instantiated and cannot be changed. Like the System.Timers.Timer class, this class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.System.Windows.Forms.Timer
(.NET Framework only), a Windows Forms component that fires an event and executes the code in one or more event sinks at regular intervals. The component has no user interface and is designed for use in a single-threaded environment; it executes on the UI thread.System.Web.UI.Timer
(.NET Framework only), an ASP.NET component that performs asynchronous or synchronous web page postbacks at a regular interval.System.Windows.Threading.DispatcherTimer
, a timer that's integrated into the Dispatcher queue. This timer is processed with a specified priority at a specified time interval.Some of them needs explicit Start
call to begin ticking (for example System.Timers
, System.Windows.Forms
). And an explicit Stop
to finish ticking.
using TimersTimer = System.Timers.Timer;
static void Main(string[] args)
{
var timer = new TimersTimer(1000);
timer.Elapsed += (s, e) => Console.WriteLine("Beep");
Thread.Sleep(1000); //1 second delay
timer.Start();
Console.ReadLine();
timer.Stop();
}
While on the other hand there are some Timers (like: System.Threading
) where you don't need explicit Start
and Stop
calls. (The provided delegate will run a background thread.) Your timer will tick until you or the runtime dispose it.
So, the following two versions will work in the same way:
using ThreadingTimer = System.Threading.Timer;
static void Main(string[] args)
{
var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
Console.ReadLine();
}
using ThreadingTimer = System.Threading.Timer;
static void Main(string[] args)
{
StartTimer();
Console.ReadLine();
}
static void StartTimer()
{
var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
}
But if your timer
disposed then it will stop ticking obviously.
using ThreadingTimer = System.Threading.Timer;
static void Main(string[] args)
{
StartTimer();
GC.Collect(0);
Console.ReadLine();
}
static void StartTimer()
{
var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
}
Just in case it helps someone, here's what caused this error for me: I needed a procedure to return json but I left out the for json path:
set @jsonout = (SELECT ID, SumLev, Census_GEOID, AreaName, Worksite
from CS_GEO G (nolock)
join @allids a on g.ID = a.[value]
where g.Worksite = @worksite)
When I tried to save the stored procedure, it threw the error. I fixed it by adding for json path to the code at the end of the procedure:
set @jsonout = (SELECT ID, SumLev, Census_GEOID, AreaName, Worksite
from CS_GEO G (nolock)
join @allids a on g.ID = a.[value]
where g.Worksite = @worksite for json path)
Unfortunately we need to run docker-compose logs
separately from docker-compose run
. In order to get this to work reliably we need to suppress the docker-compose run
exit status then redirect the log and exit with the right status.
#!/bin/bash
set -euo pipefail
docker-compose run app | tee app.log || failed=yes
docker-compose logs --no-color > docker-compose.log
[[ -z "${failed:-}" ]] || exit 1
as noted earlier, setting bash variables does not allow whitespace between the variable name on the LHS, and the variable value on the RHS, of the '=' sign.
awk can do everything and avoid the "awk"ward extra 'grep'. The use of awk's printf is to not add an unnecessary "\n" in the string which would give perl-ish matcher programs conniptions. The variable/parameter expansion for your case in bash doesn't have that issue, so either of these work:
variable=$(ps -ef | awk '/port 10 \-/ {print $12}')
variable=`ps -ef | awk '/port 10 \-/ {print $12}'`
The '-' int the awk record matching pattern removes the need to remove awk itself from the search results.
Thanks for spotting this I was about to add strings thinking the same as you that they'd get added to end of collection. It appears the params are:
msg.to.Add(<MailAddress>) adds MailAddress to the end of the collection
msg.to.Add(<string>) add a list of emails to the collection
Slightly different actions depending on param type, I think this is pretty bad form i'd have prefered split methods AddStringList of something.
Write like this:
.wrapper:after {
content: '';
display: block;
clear: both;
}
Check this http://jsfiddle.net/EyNnk/1/
Just use the ==
with the negation symbol (!
). If dtfm is the name of your data.frame:
dtfm[!dtfm$C == "Foo", ]
Or, to move the negation in the comparison:
dtfm[dtfm$C != "Foo", ]
Or, even shorter using subset()
:
subset(dtfm, C!="Foo")
try to use jquery-ui
<script src="http://code.jquery.com/ui/1.10.1/jquery-ui.js"></script>
<script>
$(function() {
$( "#calendar" ).datepicker();
});
</script>
<p>Calendar: <input type="text" id="calendar" /></p>
You can insert new rows with modified values and then delete old rows. Following example change ID to be same as foreign key PersonId
SET IDENTITY_INSERT [PersonApiLogin] ON
INSERT INTO [PersonApiLogin](
[Id]
,[PersonId]
,[ApiId]
,[Hash]
,[Password]
,[SoftwareKey]
,[LoggedIn]
,[LastAccess])
SELECT [PersonId]
,[PersonId]
,[ApiId]
,[Hash]
,[Password]
,[SoftwareKey]
,[LoggedIn]
,[LastAccess]
FROM [db304].[dbo].[PersonApiLogin]
GO
DELETE FROM [PersonApiLogin]
WHERE [PersonId] <> ID
GO
SET IDENTITY_INSERT [PersonApiLogin] OFF
GO
Probably you use Microsoft SQL Server which support Common Table Expressions (CTE) (see http://msdn.microsoft.com/en-us/library/ms190766.aspx) which are very friendly for query optimization. So I suggest you my favor construction:
WITH GetNumberOfPlans(Id,NumberOfPlans) AS (
SELECT tableA.Id, COUNT(tableC.Id)
FROM tableC
RIGHT OUTER JOIN tableA ON tableC.tableAId = tableA.Id
GROUP BY tableA.Id
),GetUserInformation(Id,Name,Owner,ImageUrl,
CompanyImageUrl,NumberOfUsers) AS (
SELECT tableA.Id, tableA.Name, tableB.Username AS Owner, tableB.ImageUrl,
tableB.CompanyImageUrl,COUNT(tableD.UserId),p.NumberOfPlans
FROM tableA
INNER JOIN tableB ON tableB.Id = tableA.Owner
RIGHT OUTER JOIN tableD ON tableD.tableAId = tableA.Id
GROUP BY tableA.Name, tableB.Username, tableB.ImageUrl, tableB.CompanyImageUrl
)
SELECT u.Id,u.Name,u.Owner,u.ImageUrl,u.CompanyImageUrl
,u.NumberOfUsers,p.NumberOfPlans
FROM GetUserInformation AS u
INNER JOIN GetNumberOfPlans AS p ON p.Id=u.Id
After some experiences with CTE you will be find very easy to write code using CTE and you will be happy with the performance.
I tried and found out that if you add a class called btn
you can get that hand
or cursor
icon if you hover over the mouse to that element. Try and see.
Example:
<span class="btn">Hovering over must have mouse cursor set to hand or pointer!</span>
Cheers!
Instead of explicitly writing the class name you could use
this.getClass().getResource("/unibo/lsb/res/dice.jpg");
I would suggest using the duplicated method on the Pandas Index itself:
df3 = df3[~df3.index.duplicated(keep='first')]
While all the other methods work, the currently accepted answer is by far the least performant for the provided example. Furthermore, while the groupby method is only slightly less performant, I find the duplicated method to be more readable.
Using the sample data provided:
>>> %timeit df3.reset_index().drop_duplicates(subset='index', keep='first').set_index('index')
1000 loops, best of 3: 1.54 ms per loop
>>> %timeit df3.groupby(df3.index).first()
1000 loops, best of 3: 580 µs per loop
>>> %timeit df3[~df3.index.duplicated(keep='first')]
1000 loops, best of 3: 307 µs per loop
Note that you can keep the last element by changing the keep argument to 'last'
.
It should also be noted that this method works with MultiIndex
as well (using df1 as specified in Paul's example):
>>> %timeit df1.groupby(level=df1.index.names).last()
1000 loops, best of 3: 771 µs per loop
>>> %timeit df1[~df1.index.duplicated(keep='last')]
1000 loops, best of 3: 365 µs per loop
Look at using the beautiful soup html parsing library.
http://www.crummy.com/software/BeautifulSoup/
You will do something like this:
import BeautifulSoup
soup = BeautifulSoup.BeautifulSoup(html)
for link in soup.findAll("a"):
print link.get("href")
A rework of impementation by @D'Nabre for C++. Don't forget to compile with -lcrypto at the end: gcc md5.c -o md5 -lcrypto
.
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <openssl/md5.h>
using namespace std;
unsigned char result[MD5_DIGEST_LENGTH];
// function to print MD5 correctly
void printMD5(unsigned char* md, long size = MD5_DIGEST_LENGTH) {
for (int i=0; i<size; i++) {
cout<< hex << setw(2) << setfill('0') << (int) md[i];
}
}
int main(int argc, char *argv[]) {
if(argc != 2) {
cout << "Specify the file..." << endl;
return 0;
}
ifstream::pos_type fileSize;
char * memBlock;
ifstream file (argv[1], ios::ate);
//check if opened
if (file.is_open() ) { cout<< "Using file\t"<< argv[1]<<endl; }
else {
cout<< "Unnable to open\t"<< argv[1]<<endl;
return 0;
}
//get file size & copy file to memory
//~ file.seekg(-1,ios::end); // exludes EOF
fileSize = file.tellg();
cout << "File size \t"<< fileSize << endl;
memBlock = new char[fileSize];
file.seekg(0,ios::beg);
file.read(memBlock, fileSize);
file.close();
//get md5 sum
MD5((unsigned char*) memBlock, fileSize, result);
//~ cout << "MD5_DIGEST_LENGTH = "<< MD5_DIGEST_LENGTH << endl;
printMD5(result);
cout<<endl;
return 0;
}
Something that hasn't been covered in the other answers = if you're using strongly typed C++11 enums, you cannot use ++
or + int
on them. In that case, a bit of a messier solution is required:
enum class myenumtype {
MYENUM_FIRST,
MYENUM_OTHER,
MYENUM_LAST
}
for(myenumtype myenum = myenumtype::MYENUM_FIRST;
myenum != myenumtype::MYENUM_LAST;
myenum = static_cast<myenumtype>(static_cast<int>(myenum) + 1)) {
do_whatever(myenum)
}
import os
os.system("your command")
Note that this is dangerous, since the command isn't cleaned. I leave it up to you to google for the relevant documentation on the 'os' and 'sys' modules. There are a bunch of functions (exec* and spawn*) that will do similar things.
This is rather easy to achieve by making a dataset with a text-query like this:
SELECT 'Item1'
UNION
SELECT 'Item2'
UNION
SELECT 'Item3'
UNION
SELECT 'Item4'
UNION
SELECT 'ItemN'
The query should return all items that can be selected.
You should try using the Grid Template.
Here's what I've used for a two Column Layout of a <ul>
<ul class="list-group row">
<li class="list-group-item col-xs-6">Row1</li>
<li class="list-group-item col-xs-6">Row2</li>
<li class="list-group-item col-xs-6">Row3</li>
<li class="list-group-item col-xs-6">Row4</li>
<li class="list-group-item col-xs-6">Row5</li>
</ul>
This worked for me.
What worked for me (I use Java 8 and Tomcat 9 in Eclipse 2019):
pom.xml
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
.jsp file
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
I found something from Arvind Pereira (http://robotics.usc.edu/~ampereir/wordpress/?p=626) and seemed to work for me:
plt.savefig(filename, transparent = True, bbox_inches = 'tight', pad_inches = 0)
The MaterialModule
was deprecated in the beta3 version with the goal that developers should only import into their applications what they are going to use and thus improve the bundle size.
The developers have now 2 options:
MyMaterialModule
which imports/exports the components that your application requires and can be imported by other (feature) modules in your application.Take the following as example (extracted from material page)
First approach:
import {MdButtonModule, MdCheckboxModule} from '@angular/material';
@NgModule({
imports: [MdButtonModule, MdCheckboxModule],
exports: [MdButtonModule, MdCheckboxModule],
})
export class MyOwnCustomMaterialModule { }
Then you can import this module into any of yours.
Second approach:
import {MdButtonModule, MdCheckboxModule} from '@angular/material';
@NgModule({
...
imports: [MdButtonModule, MdCheckboxModule],
...
})
export class PizzaPartyAppModule { }
Now you can use the respective material components in all the components declared in PizzaPartyAppModule
It is worth mentioning the following:
BrowserAnimationsModule
into your main module if you want the
animations to work@angular/cdk
to their package.json
(material dependency)BrowserModule
, as stated by the docs: Whichever approach you use, be sure to import the Angular Material modules after Angular's BrowserModule, as the import order matters for NgModules.
If you want to run a script to a database:
mysql -u user -p data_base_name_here < db.sql
You can flush hosts local MySQL using following command:
mysqladmin -u [username] -p flush-hosts
**** [MySQL password]
or
mysqladmin flush-hosts -u [username] -p
**** [MySQL password]
Though Amazon RDS database server is on network then use the following command as like as flush network MySQL server:
mysqladmin -h <RDS ENDPOINT URL> -P <PORT> -u <USER> -p flush-hosts
mysqladmin -h [YOUR RDS END POINT URL] -P 3306 -u [DB USER] -p flush-hosts
In additional suggestion you can permanently solve blocked of many connections error problem by editing my.ini file[Mysql configuration file]
change variables max_connections = 10000;
or
login into MySQL using command line -
mysql -u [username] -p
**** [MySQL password]
put the below command into MySQL window
SET GLOBAL max_connect_errors=10000;
set global max_connections = 200;
check veritable using command-
show variables like "max_connections";
show variables like "max_connect_errors";
Used below code in similar situation
driver.manage().timeouts().pageLoadTimeout(60, TimeUnit.SECONDS);
and embedded driver.get code in a try catch, which solved the issue of loading pages which were taking more than 1 minute.
This is the only thing that worked for me:
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
Image
} from 'react-native';
export default class Comp extends Component {
find_dimesions(layout){
const {x, y, width, height} = layout;
console.warn(x);
console.warn(y);
console.warn(width);
console.warn(height);
}
render() {
return (
<View onLayout={(event) => { this.find_dimesions(event.nativeEvent.layout) }} style={styles.container}>
<Text style={styles.welcome}>
Welcome to React Native!
</Text>
<Text style={styles.instructions}>
To get started, edit index.android.js
</Text>
<Text style={styles.instructions}>
Double tap R on your keyboard to reload,{'\n'}
Shake or press menu button for dev menu
</Text>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});
AppRegistry.registerComponent('Comp', () => Comp);
I tried:
ps aux | grep -w Z # returns the zombies pid
ps o ppid {returned pid from previous command} # returns the parent
kill -1 {the parent id from previous command}
this will work :)
Use one way flow syntax property binding:
<div [innerHTML]="comment"></div>
From angular docs: "Angular recognizes the value as unsafe and automatically sanitizes it, which removes the <script>
tag but keeps safe content such as the <b>
element."
import java.io.File;
import java.io.IOException;
import org.apache.maven.surefire.shade.org.apache.maven.shared.utils.io.FileUtils;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.TakesScreenshot;
import org.openqa.selenium.WebDriver;
/**
* @author Jagdeep Jain
*
*/
public class ScreenShotMaker {
// take screen shot on the test failures
public void takeScreenShot(WebDriver driver, String fileName) {
File screenShot = ((TakesScreenshot) driver)
.getScreenshotAs(OutputType.FILE);
try {
FileUtils.copyFile(screenShot, new File("src/main/webapp/screen-captures/" + fileName + ".png"));
} catch (IOException ioe) {
throw new RuntimeException(ioe.getMessage(), ioe);
}
}
}
You can also collect
with an appropriate summing collector like Collectors#summingInt(ToIntFunction)
Returns a
Collector
that produces the sum of a integer-valued function applied to the input elements. If no elements are present, the result is 0.
For example
Stream<Obj> filtered = list.stream().filter(o -> o.field > 10);
int sum = filtered.collect(Collectors.summingInt(o -> o.field));
Thanks to Marc B's help, here's what worked for me (note: Marc's rowCount() suggestion could work too, but I wasn't comfortable with the possibility of it not working on a different DB or if something changed in mine... also, his select count(*) suggestion would work too, but, I figured because I'd end up getting the data if it existed anyways, so I went this way)
$today = date('Y-m-d', strtotime('now'));
$sth = $db->prepare("SELECT id_email FROM db WHERE hardcopy = '1' AND hardcopy_date <= :today AND hardcopy_sent = '0' ORDER BY id_email ASC");
$sth->bindParam(':today',$today, PDO::PARAM_STR);
if(!$sth->execute()) {
$db = null ;
exit();
}
while ($row = $sth->fetch(PDO::FETCH_ASSOC)) {
$this->id_email[] = $row['id_email'] ;
echo $row['id_email'] ;
}
$db = null ;
if (count($this->id_email) > 0) {
echo 'not empty';
return true ;
}
echo 'empty';
return false ;
The java application takes too long to respond(maybe due start-up/jvm being cold) thus you get the proxy error.
Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /lin/Campaignn.jsp.
As Albert Maclang said amending the http timeout configuration may fix the issue. I suspect the java application throws a 500+ error thus the apache gateway error too. You should look in the logs.
Do this:
function changeHeight() { document.getElementById('chartdiv').style.height = "200px" } <button type="button" onClick="changeHeight();"> Click Me!</button>
Translation of the accepted answer by Chris into Kotlin:
val checkBox: CheckBox = findViewById(R.id.chk)
checkBox.setOnCheckedChangeListener { buttonView, isChecked ->
// Code here
}
This is not mentioned in you post but I suspect you are initiating an SSL connection from the browser to Apache, where VirtualHosts are configured, and Apache does a revese proxy to your Tomcat.
There is a serious bug in (some versions ?) of IE that sends the 'wrong' host information in an SSL connection (see EDIT below) and confuses the Apache VirtualHosts. In short the server name presented is the one of the reverse DNS resolution of the IP, not the one in the URL.
The workaround is to have one IP address per SSL virtual hosts/server name. Is short, you must end up with something like
1 server name == 1 IP address == 1 certificate == 1 Apache Virtual Host
EDIT
Though the conclusion is correct, the identification of the problem is better described here http://en.wikipedia.org/wiki/Server_Name_Indication
<script>
$(document).ready(function(){
$('button').attr('class','btn btn-primary');
}); </script>
Here is the most complete list of database support of dual from https://blog.jooq.org/tag/dual-table/:
In many other RDBMS, there is no need for dummy tables, as you can issue statements like these:
SELECT 1; SELECT 1 + 1; SELECT SQRT(2);
These are the RDBMS, where the above is generally possible:
- H2
- MySQL
- Ingres
- Postgres
- SQLite
- SQL Server
- Sybase ASE
In other RDBMS, dummy tables are required, like in Oracle. Hence, you’ll need to write things like these:
SELECT 1 FROM DUAL; SELECT 1 + 1 FROM DUAL; SELECT SQRT(2) FROM DUAL;
These are the RDBMS and their respective dummy tables:
- DB2: SYSIBM.DUAL
- Derby: SYSIBM.SYSDUMMY1
- H2: Optionally supports DUAL
- HSQLDB: INFORMATION_SCHEMA.SYSTEM_USERS
- MySQL: Optionally supports DUAL
- Oracle: DUAL
- Sybase SQL Anywhere: SYS.DUMMY
Ingres has no DUAL, but would actually need it as in Ingres you cannot have a WHERE, GROUP BY or HAVING clause without a FROM clause.
Thank you all for the answers. Here's my React + Recompose. It's a High Order Function that includes the windowHeight
and windowWidth
properties to the component.
const withDimensions = compose(
withStateHandlers(
({
windowHeight,
windowWidth
}) => ({
windowHeight: window.innerHeight,
windowWidth: window.innerWidth
}), {
handleResize: () => () => ({
windowHeight: window.innerHeight,
windowWidth: window.innerWidth
})
}),
lifecycle({
componentDidMount() {
window.addEventListener('resize', this.props.handleResize);
},
componentWillUnmount() {
window.removeEventListener('resize');
}})
)
For me $numberAsString -as [int]
of @Shay Levy is the best practice, I also use [type]::Parse(...)
or [type]::TryParse(...)
But, depending on what you need you can just put a string containing a number on the right of an arithmetic operator with a int on the left the result will be an Int32:
PS > $b = "10"
PS > $a = 0 + $b
PS > $a.gettype()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True Int32 System.ValueType
You can use Exception (try/parse) to behave in case of Problem
Copy-pasted from here: Incrementing a date in JavaScript
Three options for you:
Using just JavaScript's Date object (no libraries):
var today = new Date(); var tomorrow = new Date(today.getTime() + (24 * 60 * 60 * 1000));
Or if you don't mind changing the date in place (rather than creating a new date):
var dt = new Date(); dt.setTime(dt.getTime() + (24 * 60 * 60 * 1000));
Edit: See also Jigar's answer and David's comment below: var tomorrow = new Date(); tomorrow.setDate(tomorrow.getDate() + 1);
Using MomentJS:
var today = moment(); var tomorrow = moment(today).add(1, 'days');
(Beware that add modifies the instance you call it on, rather than returning a new instance, so today.add(1, 'days') would modify today. That's why we start with a cloning op on var tomorrow = ....)
Using DateJS, but it hasn't been updated in a long time:
var today = new Date(); // Or Date.today() var tomorrow = today.add(1).day();
I worked on a project that required a pdf report. After searching for online I found the PoDoFo library. Seemed very robust. I did not need all the features, so I created a wrapper to abstract away some of the complexity. Wasn't too difficult. You can find the library here:
http://podofo.sourceforge.net/
Enjoy!
As I too am constantly being let down by cross-browser CSS, I'd like to offer a JQuery solution here. This takes the height of each image's parent div, divide it by two and set it as a top margin between the image and the div:
$('div img').each(function() {
m = Math.floor(($(this).parent('div').height() - $(this).height())/2);
mp = m+"px";
$(this).css("margin-top",mp);
});
Programmatically (Swift 4 & 5)
self.passwordTextField.isSecureTextEntry = true
Another way I just found!
MOVE the project to some other folder and then import and if required copy to workspace
For more performance: A simple change is observing that after n = 3n+1, n will be even, so you can divide by 2 immediately. And n won't be 1, so you don't need to test for it. So you could save a few if statements and write:
while (n % 2 == 0) n /= 2;
if (n > 1) for (;;) {
n = (3*n + 1) / 2;
if (n % 2 == 0) {
do n /= 2; while (n % 2 == 0);
if (n == 1) break;
}
}
Here's a big win: If you look at the lowest 8 bits of n, all the steps until you divided by 2 eight times are completely determined by those eight bits. For example, if the last eight bits are 0x01, that is in binary your number is ???? 0000 0001 then the next steps are:
3n+1 -> ???? 0000 0100
/ 2 -> ???? ?000 0010
/ 2 -> ???? ??00 0001
3n+1 -> ???? ??00 0100
/ 2 -> ???? ???0 0010
/ 2 -> ???? ???? 0001
3n+1 -> ???? ???? 0100
/ 2 -> ???? ???? ?010
/ 2 -> ???? ???? ??01
3n+1 -> ???? ???? ??00
/ 2 -> ???? ???? ???0
/ 2 -> ???? ???? ????
So all these steps can be predicted, and 256k + 1 is replaced with 81k + 1. Something similar will happen for all combinations. So you can make a loop with a big switch statement:
k = n / 256;
m = n % 256;
switch (m) {
case 0: n = 1 * k + 0; break;
case 1: n = 81 * k + 1; break;
case 2: n = 81 * k + 1; break;
...
case 155: n = 729 * k + 425; break;
...
}
Run the loop until n = 128, because at that point n could become 1 with fewer than eight divisions by 2, and doing eight or more steps at a time would make you miss the point where you reach 1 for the first time. Then continue the "normal" loop - or have a table prepared that tells you how many more steps are need to reach 1.
PS. I strongly suspect Peter Cordes' suggestion would make it even faster. There will be no conditional branches at all except one, and that one will be predicted correctly except when the loop actually ends. So the code would be something like
static const unsigned int multipliers [256] = { ... }
static const unsigned int adders [256] = { ... }
while (n > 128) {
size_t lastBits = n % 256;
n = (n >> 8) * multipliers [lastBits] + adders [lastBits];
}
In practice, you would measure whether processing the last 9, 10, 11, 12 bits of n at a time would be faster. For each bit, the number of entries in the table would double, and I excect a slowdown when the tables don't fit into L1 cache anymore.
PPS. If you need the number of operations: In each iteration we do exactly eight divisions by two, and a variable number of (3n + 1) operations, so an obvious method to count the operations would be another array. But we can actually calculate the number of steps (based on number of iterations of the loop).
We could redefine the problem slightly: Replace n with (3n + 1) / 2 if odd, and replace n with n / 2 if even. Then every iteration will do exactly 8 steps, but you could consider that cheating :-) So assume there were r operations n <- 3n+1 and s operations n <- n/2. The result will be quite exactly n' = n * 3^r / 2^s, because n <- 3n+1 means n <- 3n * (1 + 1/3n). Taking the logarithm we find r = (s + log2 (n' / n)) / log2 (3).
If we do the loop until n = 1,000,000 and have a precomputed table how many iterations are needed from any start point n = 1,000,000 then calculating r as above, rounded to the nearest integer, will give the right result unless s is truly large.
Renaming an Application- The Complete Guide
**A) for changing Just the application name
(App name which is displayed below icon)
in the Manifest.xml file, in <application tag,
android:label="YourAppName"
then do the same in All the <activity Tags
B) For changing EVERYTHING
(folder names, Package names, Refrences,app name, etc.)
*1) Renaming package names in gen folder and manifest.xml
Right Click on Your project
Android tools- Rename Application Package
*2) Renaming package names in src folder
Expand src folder, Click on package (Single click)
Press Alt+Shift+R
Check Update references and Rename subpackages
3) Renaming the app's main Folder (Optional)
click on the application's folder (Single click)
then Press Alt+Shift+R
4) Renaming application name- Refer "A)"**
You have to do two things before a submodule will be filled:
git submodule init
git submodule update
Here is a solution that reads only the first byte of source code... returning false if the file_get_contents fails... This will also work for remote files like images.
function urlExists($url)
{
if (@file_get_contents($url,false,NULL,0,1))
{
return true;
}
return false;
}
Apparently this is by design. When Safari (OS X or iOS) is in private browsing mode, it appears as though localStorage
is available, but trying to call setItem
throws an exception.
store.js line 73
"QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to add something to storage that exceeded the quota."
What happens is that the window object still exposes localStorage
in the global namespace, but when you call setItem
, this exception is thrown. Any calls to removeItem
are ignored.
I believe the simplest fix (although I haven't tested this cross browser yet) would be to alter the function isLocalStorageNameSupported()
to test that you can also set some value.
https://github.com/marcuswestin/store.js/issues/42
function isLocalStorageNameSupported()
{
var testKey = 'test', storage = window.sessionStorage;
try
{
storage.setItem(testKey, '1');
storage.removeItem(testKey);
return localStorageName in win && win[localStorageName];
}
catch (error)
{
return false;
}
}
Consider having multiple matlab sessions. Keep the main session window (the pretty one with all the colours, file manager, command history, workspace, editor etc.) for running stuff that you know will terminate.
Stuff that you are experimenting with, say you are messing with ode suite and you get lots of warnings: matrix singular, because you altered some parameter and didn't predict what would happen, run in a separate session:
dos('matlab -automation -r &')
You can kill that without having to restart the whole of Matlab.
- Is there a way to obtain a list of Python modules available (i.e. installed) on a machine?
This works for me:
help('modules')
- Where is the module code actually stored on my machine?
Usually in /lib/site-packages
in your Python folder. (At least, on Windows.)
You can use sys.path
to find out what directories are searched for modules.
#since this was yesterday
date -dyesterday +%Y%m%d
#more precise, and more recommended
date -d'27 JUN 2011' +%Y%m%d
#assuming this is similar to yesterdays `date` question from you
#http://stackoverflow.com/q/6497525/638649
date -d'last-monday' +%Y%m%d
#going on @seth's comment you could do this
DATE="27 jun 2011"; date -d"$DATE" +%Y%m%d
#or a method to read it from stdin
read -p " Get date >> " DATE; printf " AS YYYYMMDD format >> %s" `date
-d"$DATE" +%Y%m%d`
#which then outputs the following:
#Get date >> 27 june 2011
#AS YYYYMMDD format >> 20110627
#if you really want to use awk
echo "27 june 2011" | awk '{print "date -d\""$1FS$2FS$3"\" +%Y%m%d"}' | bash
#note | bash just redirects awk's output to the shell to be executed
#FS is field separator, in this case you can use $0 to print the line
#But this is useful if you have more than one date on a line
note this only works on GNU date
I have read that:
Solaris version of date, which is unable to support
-d
can be resolve with replacing sunfreeware.com version of date
>>> from datetime import datetime
>>> print(datetime.today().strftime("%H:%M %p"))
15:31 AM
Try replacing %I
with %H
.
Take a look to this link that shows how works the mapping of EF 6 with Stored Procedures to make an Insert, Update and Delete: http://msdn.microsoft.com/en-us/data/dn468673
Addition
Here is a great example to call a stored procedure from Code First:
Lets say you have to execute an Stored Procedure with a single parameter, and that Stored Procedure returns a set of data that match with the Entity States, so we will have this:
var countryIso = "AR"; //Argentina
var statesFromArgentina = context.Countries.SqlQuery(
"dbo.GetStatesFromCountry @p0", countryIso
);
Now lets say that we whant to execute another stored procedure with two parameters:
var countryIso = "AR"; //Argentina
var stateIso = "RN"; //Río Negro
var citiesFromRioNegro = context.States.SqlQuery(
"dbo.GetCitiesFromState @p0, @p1", countryIso, stateIso
);
Notice that we are using index-based naming for parameters. This is because Entity Framework will wrap these parameters up as DbParameter objects fro you to avoid any SQL injection issues.
Hope this example helps!
if the content of foo.py
print __name__
if __name__ == '__main__':
print 'XXXX'
A file foo.py can be used in two ways.
- imported in another file :
import foo
In this case __name__
is foo
, the code section does not get executed and does not print XXXX
.
- executed directly :
python foo.py
When it is executed directly, __name__
is same as __main__
and the code in that section is executed and prints XXXX
One of the use of this functionality to write various kind of unit tests within the same module.
Jin Yong - IE has an issue with polluting the global scope with object references to any DOM elements with a "name" or "id" attribute set on the "initial" page load.
Thus you may have issues due to your variable name.
Try this and see if it works.
var someOtherName="abc";
// ^^^^^^^^^^^^^
document.getElementById('msg').value = someOtherName;
document.getElementById('sp_100').checked = true;
There is a chance (in your original code) that IE attempts to set the value of the input to a reference to that actual element (ignores the error) but leaves you with no new value.
Keep in mind that in IE6/IE7 case doesn't matter for naming objects. IE believes that "foo" "Foo" and "FOO" are all the same object.
You can change the selector and data attributes as you wish!
<select id="selectVehicle">
<option value="1" data-year="2011">Mazda</option>
<option value="2" data-year="2015">Honda</option>
<option value="3" data-year="2008">Mercedes</option>
<option value="4" data-year="2005">Toyota</option>
</select>
$("#selectVehicle").change(function () {
alert($(this).find(':selected').data("year"));
});
Here is the working example: https://jsfiddle.net/ed5axgvk/1/
No, you still need to scp [from] [to]
whichever way you're copying
The difference is, you need to scp -p server:serverpath localpath
also it should be noted that turning on HttpOnly will break applets that require stateful access back to the jvm.
the Applet http requests will not use the jsessionid cookie and may get assigned to a different tomcat.
you should give permission on your db
grant execute on (packageName or tableName) to user;
I would checkout the remote file from the "master" (the remote/origin repository) like this:
git checkout master <FileWithPath>
Example: git checkout master components/indexTest.html
$(document).ready(function() {
$('#media').carousel({
pause: true,
interval: 40000,
});
});
By using the above script, you will be able to move the images automaticaly
$(document).ready(function() {
$('#media').carousel({
pause: true,
interval: false,
});
});
By using the above script, auto-rotation
will be blocked because interval
is false
If you don't want to pass any arguments to the onclick function, just use event.target
to get the clicked element:
<button id="1" onClick="reply_click()"></button>
<button id="2" onClick="reply_click()"></button>
<button id="3" onClick="reply_click()"></button>
function reply_click()
{
// event.target is the element that is clicked (button in this case).
console.log(event.target.id);
}
data = pd.DataFrame({"a":[1,2,3,34],"b":[5,6,7,8]})
new_data = pd.melt(data)
new_data.set_index("variable", inplace=True)
This gives a dataframe with index as column name of data and all data are present in "values" column
Perhaps create a shared Fruit
interface that provides isDecayed. fruits
is now of type Fruit[]
so the type can be explicit. Like this:
interface Fruit {
isDecayed: boolean;
}
interface Apple extends Fruit {
color: string;
}
interface Pear extends Fruit {
weight: number;
}
interface FruitBasket {
apples: Apple[];
pears: Pear[];
}
const fruitBasket: FruitBasket = { apples: [], pears: [] };
const key: keyof FruitBasket = Math.random() > 0.5 ? 'apples': 'pears';
const fruits: Fruit[] = fruitBasket[key];
const freshFruits = fruits.filter((fruit) => !fruit.isDecayed);
I had a similar situation. On top of what you did, I wanted to center my columns in the container while not allowing empty columns to for them left or right:
.grid {
display: grid;
grid-gap: 10px;
justify-content: center;
grid-template-columns: repeat(auto-fit, minmax(200px, auto));
}