Swift is statically typed so the performSelector:
methods are to fall by the wayside.
Instead, use GCD to dispatch a suitable block to the relevant queue — in this case it'll presumably be the main queue since it looks like you're doing UIKit work.
EDIT: the relevant performSelector:
is also notably missing from the Swift version of the NSRunLoop
documentation ("1 Objective-C symbol hidden") so you can't jump straight in with that. With that and its absence from the Swiftified NSObject
I'd argue it's pretty clear what Apple is thinking here.
Well, NSOperations are simply an API built on top of Grand Central Dispatch. So when you’re using NSOperations, you’re really still using Grand Central Dispatch. It’s just that NSOperations give you some fancy features that you might like. You can make some operations dependent on other operations, reorder queues after you sumbit items, and other things like that. In fact, ImageGrabber is already using NSOperations and operation queues! ASIHTTPRequest uses them under the hood, and you can configure the operation queue it uses for different behavior if you’d like. So which should you use? Whichever makes sense for your app. For this app it’s pretty simple so we just used Grand Central Dispatch directly, no need for the fancy features of NSOperation. But if you need them for your app, feel free to use it!
Swift 2.x answer:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
self.getResultSetFromDB(docids)
}
Add the framework required for the method used in the project target in the "Link Binaries With Libraries" list of Build Phases, it will work easily. Like I have imported to my project
QuartzCore.framework
For the bug
Undefined symbols for architecture i386:
Found following solution working for my similar problem:
private ExtendedHashMap mData = new ExtendedHashMap();
private String[] mKeys;
public void setNewData(ExtendedHashMap data) {
mData.putAll(data);
mKeys = data.keySet().toArray(new String[data.size()]);
notifyDataSetChanged();
}
Using the clear-command
mData.clear()
is not nessescary
This worked for me. may help some one. Turn off firewall. on RHEL 7
systemctl stop firewalld
If you will place your definitions in this order then the code will be compiled
class Ball;
class Player {
public:
void doSomething(Ball& ball);
private:
};
class Ball {
public:
Player& PlayerB;
float ballPosX = 800;
private:
};
void Player::doSomething(Ball& ball) {
ball.ballPosX += 10; // incomplete type error occurs here.
}
int main()
{
}
The definition of function doSomething requires the complete definition of class Ball because it access its data member.
In your code example module Player.cpp has no access to the definition of class Ball so the compiler issues an error.
The two functions do vastly different things!
The resize()
method (and passing argument to constructor is equivalent to that) will insert or delete appropriate number of elements to the vector to make it given size (it has optional second argument to specify their value). It will affect the size()
, iteration will go over all those elements, push_back will insert after them and you can directly access them using the operator[]
.
The reserve()
method only allocates memory, but leaves it uninitialized. It only affects capacity()
, but size()
will be unchanged. There is no value for the objects, because nothing is added to the vector. If you then insert the elements, no reallocation will happen, because it was done in advance, but that's the only effect.
So it depends on what you want. If you want an array of 1000 default items, use resize()
. If you want an array to which you expect to insert 1000 items and want to avoid a couple of allocations, use reserve()
.
EDIT: Blastfurnace's comment made me read the question again and realize, that in your case the correct answer is don't preallocate manually. Just keep inserting the elements at the end as you need. The vector will automatically reallocate as needed and will do it more efficiently than the manual way mentioned. The only case where reserve()
makes sense is when you have reasonably precise estimate of the total size you'll need easily available in advance.
EDIT2: Ad question edit: If you have initial estimate, then reserve()
that estimate. If it turns out to be not enough, just let the vector do it's thing.
My contribution:
extension UIView {
class func fromNib<T: UIView>() -> T {
return Bundle(for: T.self).loadNibNamed(String(describing: T.self), owner: nil, options: nil)![0] as! T
}
}
Then call it like this:
let myCustomView: CustomView = UIView.fromNib()
..or even:
let myCustomView: CustomView = .fromNib()
Let's say you have an Employee
class that has a method greet
. When the greet
method is called it simply prints Hello everyone!
. So that is the expected behavior of greet
method
public class Employee {
void greet() {
System.out.println("Hello everyone!");
}
}
Now, let GrumpyEmployee
subclass Employee
and override greet
method as shown below.
public class GrumpyEmployee extends Employee {
@Override
void greet() {
System.out.println("Get lost!");
}
}
Now in the below code have a look at the sayHello
method. It takes Employee
instance as a parameter and calls the greet method hoping that it would say Hello everyone!
But what we get is Get lost!
. This change in behavior is because of Employee grumpyEmployee = new GrumpyEmployee();
public class TestFinal {
static Employee grumpyEmployee = new GrumpyEmployee();
public static void main(String[] args) {
TestFinal testFinal = new TestFinal();
testFinal.sayHello(grumpyEmployee);
}
private void sayHello(Employee employee) {
employee.greet(); //Here you would expect a warm greeting, but what you get is "Get lost!"
}
}
This situation can be avoided if the Employee
class was made final
. Just imagine the amount of chaos a cheeky programmer could cause if String
Class was not declared as final
.
No, arrays/lists can't be passed to SQL Server directly.
The following options are available:
The toggleOption function is not perfect and introduced nasty bugs in my application. jQuery will get confused with .val() and .arraySerialize() Try to select options 4 and 5 to see what I mean:
<select id="t">
<option value="v1">options 1</option>
<option value="v2">options 2</option>
<option value="v3" id="o3">options 3</option>
<option value="v4">options 4</option>
<option value="v5">options 5</option>
</select>
<script>
jQuery.fn.toggleOption = function( show ) {
jQuery( this ).toggle( show );
if( show ) {
if( jQuery( this ).parent( 'span.toggleOption' ).length )
jQuery( this ).unwrap( );
} else {
jQuery( this ).wrap( '<span class="toggleOption" style="display: none;" />' );
}
};
$("#o3").toggleOption(false);
$("#t").change(function(e) {
if($(this).val() != this.value) {
console.log("Error values not equal", this.value, $(this).val());
}
});
</script>
I know this post is too old; however for your interest, in Java 8 and later, you can use the int
data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of 232-1. Use the Integer
class to use int
data type as an unsigned integer and static methods like compareUnsigned()
, divideUnsigned()
etc. have been added to the Integer
class to support the arithmetic operations for unsigned integers.
It's called a shebang. In unix-speak, # is called sharp (like in music) or hash (like hashtags on twitter), and ! is called bang. (You can actually reference your previous shell command with !!, called bang-bang). So when put together, you get haSH-BANG, or shebang.
The part after the #! tells Unix what program to use to run it. If it isn't specified, it will try with bash (or sh, or zsh, or whatever your $SHELL variable is) but if it's there it will use that program. Plus, # is a comment in most languages, so the line gets ignored in the subsequent execution.
You should put the script as argument for a *NIX shell you run, equivalent to the *NIXish
sh myscriptfile
You could use a "variable" inside the output filename, for example:
/tmp/FetchBlock-${current_date}.txt
current_date:
Returns the current system time formatted as yyyyMMdd_HHmm. An optional argument can be used to provide alternative formatting. The argument must be valid pattern for java.util.SimpleDateFormat.
Or you can also use a system_property or an env_var to specify something dynamic (either one needs to be specified as arguments)
In the case of named lists I find those helper functions useful
member <- function(list,names){
## return the elements of the list with the input names
member..names <- names(list)
index <- which(member..names %in% names)
list[index]
}
exclude <- function(list,names){
## return the elements of the list not belonging to names
member..names <- names(list)
index <- which(!(member..names %in% names))
list[index]
}
aa <- structure(list(a = 1:10, b = 4:5, fruits = c("apple", "orange"
)), .Names = c("a", "b", "fruits"))
> aa
## $a
## [1] 1 2 3 4 5 6 7 8 9 10
## $b
## [1] 4 5
## $fruits
## [1] "apple" "orange"
> member(aa,"fruits")
## $fruits
## [1] "apple" "orange"
> exclude(aa,"fruits")
## $a
## [1] 1 2 3 4 5 6 7 8 9 10
## $b
## [1] 4 5
I used declare methods with the public
modifier, because it makes the code more readable, especially with syntax highlighting. In our latest project though, we used Checkstyle which shows a warning with the default configuration for public
modifiers on interface methods, so I switched to ommitting them.
So I'm not really sure what's best, but one thing I really don't like is using public abstract
on interface methods. Eclipse does this sometimes when refactoring with "Extract Interface".
I did some modification to the above code to make it work faster if you are searching in only one owner. You just have to change the 3 variables v_owner, v_data_type and v_search_string to fit what you are searching for.
SET SERVEROUTPUT ON SIZE 100000
DECLARE
match_count INTEGER;
-- Type the owner of the tables you are looking at
v_owner VARCHAR2(255) :='ENTER_USERNAME_HERE';
-- Type the data type you are look at (in CAPITAL)
-- VARCHAR2, NUMBER, etc.
v_data_type VARCHAR2(255) :='VARCHAR2';
-- Type the string you are looking at
v_search_string VARCHAR2(4000) :='string to search here...';
BEGIN
FOR t IN (SELECT table_name, column_name FROM all_tab_cols where owner=v_owner and data_type = v_data_type) LOOP
EXECUTE IMMEDIATE
'SELECT COUNT(*) FROM '||t.table_name||' WHERE '||t.column_name||' = :1'
INTO match_count
USING v_search_string;
IF match_count > 0 THEN
dbms_output.put_line( t.table_name ||' '||t.column_name||' '||match_count );
END IF;
END LOOP;
END;
/
If you want to implement deep clone use JSON.parse(JSON.stringify(your {} or []))
const myObj ={_x000D_
a:1,_x000D_
b:2,_x000D_
b:3_x000D_
}_x000D_
_x000D_
const deepClone=JSON.parse(JSON.stringify(myObj));_x000D_
deepClone.a =12;_x000D_
console.log("deepClone-----"+myObj.a);_x000D_
const withOutDeepClone=myObj;_x000D_
withOutDeepClone.a =12;_x000D_
console.log("withOutDeepClone----"+myObj.a);
_x000D_
If you already have your line of text in a variable $LINE, then you should be able to say
for L in $LINE; do
echo $L;
done
>>> 2 == 2.0
True
>>> 2 is 2.0
False
Use ==
Note: I found this question looking for one of the steps in the answer to how to resize an existing array.
So I thought I would add that information here, in case anyone else was searching for how to do a ranged copy as a partial answer to the question of resizing an array.
For anyone else finding this question looking for the same thing I was, it is very simple:
Array.Resize<T>(ref arrayVariable, newSize);
where T is the type, i.e. where arrayVariable is declared:
T[] arrayVariable;
That method handles null checks, as well as newSize==oldSize having no effect, and of course silently handles the case where one of the arrays is longer than the other.
See the MSDN article for more.
I got this on Firefox (FF58). I fixed this with:
dom.moduleScripts.enabled
in about:config
Source: Import page on mozilla (See Browser compatibility)
type="module"
to your script tag where you import the js file<script type="module" src="appthatimports.js"></script>
./
, /
, ../
or http://
before)import * from "./mylib.js"
For more examples, this blog post is good.
Consider using the E.164 format. For full international support, you'd need a VARCHAR of 15 digits.
See Twilio's recommendation for more information on localization of phone numbers.
Here you go, create a .bat file with the following in it :
@echo off
REM Creating a Newline variable (the two blank lines are required!)
set NLM=^
set NL=^^^%NLM%%NLM%^%NLM%%NLM%
REM Example Usage:
echo There should be a newline%NL%inserted here.
echo.
pause
You should see output like the following:
There should be a newline
inserted here.
Press any key to continue . . .
You only need the code between the REM statements, obviously.
Aaron Bennet's solution is working perfectly for me, but i had to remove this line from his code --> white-space: -pre-wrap;
beacause it was giving an error, so the final working code is the following:
.wordwrap {
white-space: pre-wrap; /* CSS3 */
white-space: -moz-pre-wrap; /* Firefox */
white-space: -o-pre-wrap; /* Opera 7 */
word-wrap: break-word; /* IE */
}
thank you very much
Here is what I'm using:
if (mySQLConnection.State != ConnectionState.Open)
{
mySQLConnection.Close();
mySQLConnection.Open();
}
The reason I'm not simply using:
if (mySQLConnection.State == ConnectionState.Closed)
{
mySQLConnection.Open();
}
Is because the ConnectionState can also be:
Broken, Connnecting, Executing, Fetching
In addition to
Open, Closed
Additionally Microsoft states that Closing, and then Re-opening the connection "will refresh the value of State." See here http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.state(v=vs.110).aspx
jQuery.preferCulture("en-IN");
var price = jQuery.format(39.00, "c");
output is: Rs. 39.00
use jquery.glob.js,
jQuery.glob.all.js
That's the code I use:
<?php
$path="C:/foopath/";
$file="foofile.txt";
//read file contents
$content="
<h2>$file</h2>
<code>
<pre>".htmlspecialchars(file_get_contents("$path/$file"))."</pre>
</code>";
//display
echo $content;
?>
Keep in mind that if the user can modify $path or $file (for example via $_GET or $_POST), he/she will be able to see all your source files (danger!)
This should also work.
this.ViewData.Add("index", index);
Html.RenderPartial(
"ProductImageForm",
image,
this.ViewData
);
Someone has already made a benchmark: jQuery document.createElement equivalent?
$(document.createElement('div'))
is the big winner.
This is how to get the html DOM element purely with JS:
var htmlElement = document.getElementsByTagName("html")[0];
or
var htmlElement = document.querySelector("html");
And if you want to use jQuery to get attributes from it...
$(htmlElement).attr(INSERT-ATTRIBUTE-NAME);
You can do this as:
WITH abc AS( select
FROM ...)
, XYZ AS(select
From abc ....) /*This one uses "abc" multiple times*/
Select
From XYZ.... /*using abc, XYZ multiple times*/
You could probably try this to get file sizes in kB and MB Until the file size in bytes would be upto 7 digits, the outcome would be in kbs. 7 seems to be the magic number here. After which, if the bytes would have 7 to 10 digits, we would have to divide it by 10**3(n) where n is the appending action . This pattern would repeat for every 3 digits added.
let fileSize = myInp.files[0].size.toString();
if(fileSize.length < 7) return `${Math.round(+fileSize/1024).toFixed(2)}kb`
return `${(Math.round(+fileSize/1024)/1000).toFixed(2)}MB`
What I do is I try to reset hard to HEAD. This will wipe out all the local commits:
git reset --hard HEAD^
SELECT
hostid,
sum( if( itemname = 'A', itemvalue, 0 ) ) AS A,
sum( if( itemname = 'B', itemvalue, 0 ) ) AS B,
sum( if( itemname = 'C', itemvalue, 0 ) ) AS C
FROM
bob
GROUP BY
hostid;
swift enforces you to initialise every member var before it is ever/might ever be used. Since it can't be sure what happens when it is supers turn, it errors out: better safe than sorry
normed_matrix = normalize(input_data, axis=1, norm='l1')
print(normed_matrix)
where input_data is the name of your 2D array
ROUND(time_to_sec((TIMEDIFF(NOW(), "2015-06-10 20:15:00"))) / 60);
Yes; functions (and methods) are first class objects in Python. The following works:
def foo(f):
print "Running parameter f()."
f()
def bar():
print "In bar()."
foo(bar)
Outputs:
Running parameter f().
In bar().
These sorts of questions are trivial to answer using the Python interpreter or, for more features, the IPython shell.
try this. This is worked for me.
android:clickable="true"
android:focusable="true"
android:background="?android:attr/selectableItemBackground"
Based on the answer above from Daniel, here's my take using Python3.
import numpy
def circlepoints(points,radius,center):
shape = []
slice = 2 * 3.14 / points
for i in range(points):
angle = slice * i
new_x = center[0] + radius*numpy.cos(angle)
new_y = center[1] + radius*numpy.sin(angle)
p = (new_x,new_y)
shape.append(p)
return shape
print(circlepoints(100,20,[0,0]))
In addition to Sabeen's answer:
The first column id is your primary key.
Don't insert ''
into the primary key, but insert null instead.
INSERT INTO users
(`id`,`title`,`firstname`,`lastname`,`company`,`address`,`city`,`county`
,`postcode`,`phone`,`mobile`,`category`,`email`,`password`,`userlevel`)
VALUES
(null,'','John','Doe','company','Streeet','city','county'
,'postcode','phone','','category','[email protected]','','');
If it's an autoincrement key this will fix your problem.
If not make id
an autoincrement key, and always insert null
into it to trigger an autoincrement.
MySQL has a setting to autoincrement keys only on null
insert or on both inserts of 0
and null
. Don't count on this setting, because your code may break if you change server.
If you insert null
your code will always work.
See: http://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html
This will read a csv file and it includes a csv line splitter that handles double quotes and it can read even if excel has it open.
public List<Dictionary<string, string>> LoadCsvAsDictionary(string path)
{
var result = new List<Dictionary<string, string>>();
var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
System.IO.StreamReader file = new System.IO.StreamReader(fs);
string line;
int n = 0;
List<string> columns = null;
while ((line = file.ReadLine()) != null)
{
var values = SplitCsv(line);
if (n == 0)
{
columns = values;
}
else
{
var dict = new Dictionary<string, string>();
for (int i = 0; i < columns.Count; i++)
if (i < values.Count)
dict.Add(columns[i], values[i]);
result.Add(dict);
}
n++;
}
file.Close();
return result;
}
private List<string> SplitCsv(string csv)
{
var values = new List<string>();
int last = -1;
bool inQuotes = false;
int n = 0;
while (n < csv.Length)
{
switch (csv[n])
{
case '"':
inQuotes = !inQuotes;
break;
case ',':
if (!inQuotes)
{
values.Add(csv.Substring(last + 1, (n - last)).Trim(' ', ','));
last = n;
}
break;
}
n++;
}
if (last != csv.Length - 1)
values.Add(csv.Substring(last + 1).Trim());
return values;
}
Your expression should already match dashes, because the final - will not be interpreted as a range operator (since the range has no end). To add underscores as well, try:
([A-Za-z0-9_-]+)
Here's an example if:
ifeq ($(strip $(OS)),Linux)
PYTHON = /usr/bin/python
FIND = /usr/bin/find
endif
Note that this comes with a word of warning that different versions of Make have slightly different syntax, none of which seems to be documented very well.
It is possible using sun.misc.Unsafe
: see this great answer from @Peter Lawrey -> Is there a way to get a reference address?
Using its code for printAddresses() :
public static void printAddresses(String label, Object... objects) {
System.out.print(label + ": 0x");
long last = 0;
int offset = unsafe.arrayBaseOffset(objects.getClass());
int scale = unsafe.arrayIndexScale(objects.getClass());
switch (scale) {
case 4:
long factor = is64bit ? 8 : 1;
final long i1 = (unsafe.getInt(objects, offset) & 0xFFFFFFFFL) * factor;
System.out.print(Long.toHexString(i1));
last = i1;
for (int i = 1; i < objects.length; i++) {
final long i2 = (unsafe.getInt(objects, offset + i * 4) & 0xFFFFFFFFL) * factor;
if (i2 > last)
System.out.print(", +" + Long.toHexString(i2 - last));
else
System.out.print(", -" + Long.toHexString( last - i2));
last = i2;
}
break;
case 8:
throw new AssertionError("Not supported");
}
System.out.println();
}
I set up this test :
//hashcode
System.out.println("Hashcode : "+myObject.hashCode());
System.out.println("Hashcode : "+System.identityHashCode(myObject));
System.out.println("Hashcode (HEX) : "+Integer.toHexString(myObject.hashCode()));
//toString
System.out.println("toString : "+String.valueOf(myObject));
printAddresses("Address", myObject);
Here is the output :
Hashcode : 125665513
Hashcode : 125665513
Hashcode (HEX) : 77d80e9
toString : java.lang.Object@77d80e9
Address: 0x7aae62270
Conclusion :
if you just want to close form1 from form2 without closing form2 as well in the process, as the title suggests, then you could pass a reference to form 1 along to form 2 when you create it and use that to close form 1
for example you could add a
public class Form2 : Form
{
Form2(Form1 parentForm):base()
{
this.parentForm = parentForm;
}
Form1 parentForm;
.....
}
field and constructor to Form2
if you want to first close form2 and then form1 as the text of the question suggests, I'd go with Justins answer of returning an appropriate result to form1 on upon closing form2
If your project has been set up as a PCL forms project (and very likely as Shared Forms as well but I haven't tried that) there is a class App.cs that looks like this:
public class App
{
public static Page GetMainPage ()
{
AuditorDB.Model.Extensions.AutoTimestamp = true;
return new NavigationPage (new LoginPage ());
}
}
you can modify the GetMainPage
method to return a new TabbedPaged or some other page you have defined in the project
From there on you can add commands or event handlers to execute code and do
// to show OtherPage and be able to go back
Navigation.PushAsync(new OtherPage());
// to show AnotherPage and not have a Back button
Navigation.PushModalAsync(new AnotherPage());
// to go back one step on the navigation stack
Navigation.PopAsync();
If you want to put multiple conditions in filter
, you can use &&
and ||
operator.
var product= Object.values(arr_products).filter(x => x.Status==status && x.email==user)
No you don't have to put credentials, You have to put headers on client side eg:
$http({
url: 'url of service',
method: "POST",
data: {test : name },
withCredentials: true,
headers: {
'Content-Type': 'application/json; charset=utf-8'
}
});
And and on server side you have to put headers to this is example for nodejs:
/**
* On all requests add headers
*/
app.all('*', function(req, res,next) {
/**
* Response settings
* @type {Object}
*/
var responseSettings = {
"AccessControlAllowOrigin": req.headers.origin,
"AccessControlAllowHeaders": "Content-Type,X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Date, X-Api-Version, X-File-Name",
"AccessControlAllowMethods": "POST, GET, PUT, DELETE, OPTIONS",
"AccessControlAllowCredentials": true
};
/**
* Headers
*/
res.header("Access-Control-Allow-Credentials", responseSettings.AccessControlAllowCredentials);
res.header("Access-Control-Allow-Origin", responseSettings.AccessControlAllowOrigin);
res.header("Access-Control-Allow-Headers", (req.headers['access-control-request-headers']) ? req.headers['access-control-request-headers'] : "x-requested-with");
res.header("Access-Control-Allow-Methods", (req.headers['access-control-request-method']) ? req.headers['access-control-request-method'] : responseSettings.AccessControlAllowMethods);
if ('OPTIONS' == req.method) {
res.send(200);
}
else {
next();
}
});
Also you need this, to implement some action to every options of menu.
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_help:
Toast.makeText(this, "This is teh option help", Toast.LENGTH_LONG).show();
break;
default:
break;
}
return true;
}
Try this:
If (($x !~ /\D/) && ($x ne "")) { ... }
The most simple solution and easiest way is to add shadow for all four side. CSS
box-shadow: 0 0 2px 2px #ccc; /* with blur shadow*/
box-shadow: 0 0 0 2px #ccc; /* without blur shadow*/
in my case i did following
$mail = new PHPMailer;
$mail->isSMTP();
$mail->Host = '<YOUR HOST>';
$mail->Port = 587;
$mail->SMTPAuth = true;
$mail->Username = '<USERNAME>';
$mail->Password = '<PASSWORD>';
$mail->SMTPSecure = '';
$mail->smtpConnect([
'ssl' => [
'verify_peer' => false,
'verify_peer_name' => false,
'allow_self_signed' => true
]
]);
$mail->smtpClose();
$mail->From = '<[email protected]>';
$mail->FromName = '<MAIL FROM NAME>';
$mail->addAddress("<[email protected]>", '<SEND TO>');
$mail->isHTML(true);
$mail->Subject= '<SUBJECTHERE>';
$mail->Body = '<h2>Test Mail</h2>';
$isSend = $mail->send();
I have the same issue. I changed all my imports from
#import "HMSegmentedControl.h"
to #import <HMSegmentedControl/HMSegmentedControl.h>
for example.
I can't find a way to create a table with icons in SO, so I am uploading 2 images.
flush()
will synchronize your database with the current state of object/objects held in the memory but it does not commit the transaction. So, if you get any exception after flush()
is called, then the transaction will be rolled back.
You can synchronize your database with small chunks of data using flush()
instead of committing a large data at once using commit()
and face the risk of getting an OutOfMemoryException
.
commit()
will make data stored in the database permanent. There is no way you can rollback your transaction once the commit()
succeeds.
As suggested by user7860670, right-click on the project, select properties, navigate to C/C++ -> Preprocessor and add _USE_MATH_DEFINES
to the Preprocessor Definitions.
That's what worked for me.
Try using the following code :
holder.text.setTextColor(Color.parseColor("F00"));
Basic usage of .ajax
would look something like this:
HTML:
<form id="foo">
<label for="bar">A bar</label>
<input id="bar" name="bar" type="text" value="" />
<input type="submit" value="Send" />
</form>
jQuery:
// Variable to hold request
var request;
// Bind to the submit event of our form
$("#foo").submit(function(event){
// Prevent default posting of form - put here to work in case of errors
event.preventDefault();
// Abort any pending request
if (request) {
request.abort();
}
// setup some local variables
var $form = $(this);
// Let's select and cache all the fields
var $inputs = $form.find("input, select, button, textarea");
// Serialize the data in the form
var serializedData = $form.serialize();
// Let's disable the inputs for the duration of the Ajax request.
// Note: we disable elements AFTER the form data has been serialized.
// Disabled form elements will not be serialized.
$inputs.prop("disabled", true);
// Fire off the request to /form.php
request = $.ajax({
url: "/form.php",
type: "post",
data: serializedData
});
// Callback handler that will be called on success
request.done(function (response, textStatus, jqXHR){
// Log a message to the console
console.log("Hooray, it worked!");
});
// Callback handler that will be called on failure
request.fail(function (jqXHR, textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
// Callback handler that will be called regardless
// if the request failed or succeeded
request.always(function () {
// Reenable the inputs
$inputs.prop("disabled", false);
});
});
Note: Since jQuery 1.8, .success()
, .error()
and .complete()
are deprecated in favor of .done()
, .fail()
and .always()
.
Note: Remember that the above snippet has to be done after DOM ready, so you should put it inside a $(document).ready()
handler (or use the $()
shorthand).
Tip: You can chain the callback handlers like this: $.ajax().done().fail().always();
PHP (that is, form.php):
// You can access the values posted by jQuery.ajax
// through the global variable $_POST, like this:
$bar = isset($_POST['bar']) ? $_POST['bar'] : null;
Note: Always sanitize posted data, to prevent injections and other malicious code.
You could also use the shorthand .post
in place of .ajax
in the above JavaScript code:
$.post('/form.php', serializedData, function(response) {
// Log the response to the console
console.log("Response: "+response);
});
Note: The above JavaScript code is made to work with jQuery 1.8 and later, but it should work with previous versions down to jQuery 1.5.
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);
var promise = $interval(function(){
if($location.path() == '/landing'){
$rootScope.$emit('testData',"test");
$interval.cancel(promise);
}
},2000);
code to select dropdown using xpath
Select select = new
Select(driver.findElement(By.xpath("//select[@id='periodId']));
code to select particaular option using selectByVisibleText
select.selectByVisibleText(Last 52 Weeks);
NomeN has answered correctly, but this answer wouldn't be of much use for beginners like me because we will have another problem to solve and we wouldn't know how to use RegEx in there. So I am adding a bit of explanation to this. The answer is
search:
(\w+\\.someMethod\\(\\))
replace:
((TypeName)$1)
Here:
In search:
First and last (
, )
depicts a group in regex
\w
depicts words (alphanumeric + underscore)
+
depicts one or more (ie one or more of alphanumeric + underscore)
.
is a special character which depicts any character (ie .+
means
one or more of any character). Because this is a special character
to depict a .
we should give an escape character with it, ie \.
someMethod
is given as it is to be searched.
The two parenthesis (
, )
are given along with escape character
because they are special character which are used to depict a group
(we will discuss about group in next point)
In replace:
It is given ((TypeName)$1)
, here $1
depicts the
group. That is all the characters that are enclosed within the first
and last parenthesis (
, )
in the search field
Also make sure you have checked the 'Regular expression' option in find an replace box
Firstly checked the list of installed Python packages by:
pip list | grep -i keras
If there is keras shown then install it by:
pip install keras --upgrade --log ./pip-keras.log
now check the log, if there is any pending dependencies are present, it will affect your installation. So remove dependencies and then again install it.
This bit gives you ability to paginate using SQL Server, and newer versions of MySQL and carries the total number of rows in every row. Uses your pimary key to count number of unique rows.
WITH T AS
(
SELECT TABLE_ID, ROW_NUMBER() OVER (ORDER BY TABLE_ID) AS RN
, (SELECT COUNT(TABLE_ID) FROM TABLE) AS TOTAL
FROM TABLE (NOLOCK)
)
SELECT T2.FIELD1, T2.FIELD2, T2.FIELD3, T.TOTAL
FROM TABLE T2 (NOLOCK)
INNER JOIN T ON T2.TABLE_ID=T.TABLE_ID
WHERE T.RN >= 100
AND T.RN < 200
My reading of the docs is that HttpConnection itself is not treated as thread safe, and hence MultiThreadedHttpConnectionManager provides a reusable pool of HttpConnections, you have a single MultiThreadedHttpConnectionManager shared by all threads and initialised exactly once. So you need a couple of small refinements to option A.
MultiThreadedHttpConnectionManager connman = new MultiThreadedHttpConnectionManag
Then each thread should be using the sequence for every request, getting a conection from the pool and putting it back on completion of its work - using a finally block may be good. You should also code for the possibility that the pool has no available connections and process the timeout exception.
HttpConnection connection = null
try {
connection = connman.getConnectionWithTimeout(
HostConfiguration hostConfiguration, long timeout)
// work
} catch (/*etc*/) {/*etc*/} finally{
if ( connection != null )
connman.releaseConnection(connection);
}
As you are using a pool of connections you won't actually be closing the connections and so this should not hit the TIME_WAIT problem. This approach does assuume that each thread doesn't hang on to the connection for long. Note that conman itself is left open.
If your table is very big, you can also process rows by "small packages" (not all at oce) (laravel doc: Eloquent> Chunking Results )
Post::chunk(200, function($posts)
{
foreach ($posts as $post)
{
// process post here.
}
});
Try the below code to unprotect the workbook. It works for me just fine in excel 2010 but I am not sure if it will work in 2013.
Sub PasswordBreaker()
'Breaks worksheet password protection.
Dim i As Integer, j As Integer, k As Integer
Dim l As Integer, m As Integer, n As Integer
Dim i1 As Integer, i2 As Integer, i3 As Integer
Dim i4 As Integer, i5 As Integer, i6 As Integer
On Error Resume Next
For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
ThisWorkbook.Unprotect Chr(i) & Chr(j) & Chr(k) & _
Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
If ThisWorkbook.ProtectStructure = False Then
MsgBox "One usable password is " & Chr(i) & Chr(j) & _
Chr(k) & Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
Exit Sub
End If
Next: Next: Next: Next: Next: Next
Next: Next: Next: Next: Next: Next
End Sub
Two's complement is one of the way of expressing a negative number and most of the controllers and processors store a negative number in 2's complement form
Couldn't find any definitive reference, but I see that the example code for os.walk uses os.path but only imports os
you can use this command by getting your data. this will extract your data...
select * from employees where to_char(es_date,'dd/mon/yyyy')='17/jun/2003';
Pragma directives specify operating system or machine specific (x86 or x64 etc) compiler options. There are several options available. Details can be found in https://msdn.microsoft.com/en-us/library/d9x1s805.aspx
#pragma comment( comment-type [,"commentstring"] )
has this format.
Refer https://msdn.microsoft.com/en-us/library/7f0aews7.aspx for details about different comment-type.
#pragma comment(lib, "kernel32")
#pragma comment(lib, "user32")
The above lines of code includes the library names (or path) that need to be searched by the linker. These details are included as part of the library-search record in the object file.
So, in this case kernel.lib
and user32.lib
are searched by the linker and included in the final executable.
HTML4/XHTML1 requires
<script type="...">...</script>
HTML5 faces the fact that there is only one scripting language on the web, and allows
<script>...</script>
The latter works in any browser that supports scripting (NN2+).
A switch is a pattern, whether implemented with a switch statement, if else chain, lookup table, oop polymorphism, pattern matching or something else.
Do you want to eliminate the use of the "switch statement" or the "switch pattern"? The first one can be eliminated, the second one, only if another pattern/algorithm can be used, and most of the time that is not possible or it's not a better approach to do so.
If you want to eliminate the switch statement from code, the first question to ask is where does it make sense to eliminate the switch statement and use some other technique. Unfortunately the answer to this question is domain specific.
And remember that compilers can do various optimizations to switch statements. So for example if you want to do message processing efficiently, a switch statement is pretty much the way to go. But on the other hand running business rules based on a switch statement is probably not the best way to go and the application should be rearchitected.
Here are some alternatives to switch statement :
A stateful server keeps state between connections. A stateless server does not.
So, when you send a request to a stateful server, it may create some kind of connection object that tracks what information you request. When you send another request, that request operates on the state from the previous request. So you can send a request to "open" something. And then you can send a request to "close" it later. In-between the two requests, that thing is "open" on the server.
When you send a request to a stateless server, it does not create any objects that track information regarding your requests. If you "open" something on the server, the server retains no information at all that you have something open. A "close" operation would make no sense, since there would be nothing to close.
HTTP and NFS are stateless protocols. Each request stands on its own.
Sometimes cookies are used to add some state to a stateless protocol. In HTTP (web pages), the server sends you a cookie and then the browser holds the state, only to send it back to the server on a subsequent request.
SMB is a stateful protocol. A client can open a file on the server, and the server may deny other clients access to that file until the client closes it.
Use:
System.out.println("Current date in Date Format: " + sdf.format(date));
For those who don't want to create any models, use the following code:
var result = JsonConvert.DeserializeObject<
List<Dictionary<string,
Dictionary<string, string>>>>(content);
Note: This doesn't work for your JSON string. This is not a general solution for any JSON structure.
You can use 'onclick' attribute like this :
<a ... href="javascript: onclick();" ...>...</a>
first ensure that your table storage engine type should be innoDB (you can set it using Table operations Tab)
if you are using new phpmyadmin then use new "Relation view" tab to make foreign key relation
if you are using old version of phpmyadmin then the "relation view" button will show on the bottom of the table columns
As others have suggested that you should look into MERGE statement but nobody provided a solution using it I'm adding my own answer with this particular TSQL construct. I bet you'll like it.
Your code has a typo in your if
statement in not exists(select...)
part. Inner select
statement has only one where
condition while UserName condition is excluded from the not exists
due to invalid brace completion. In any case you cave too many closing braces.
I assume this based on the fact that you're using two where
conditions in update
statement later on in your code.
Let's continue to my answer...
MERGE statement is a beautiful TSQL gem very well suited for "insert or update" situations. In your case it would look similar to the following code. Take into consideration that I'm declaring variables what are likely stored procedure parameters (I suspect).
declare @clockDate date = '08/10/2012';
declare @userName = 'test';
merge Clock as target
using (select @clockDate, @userName) as source (ClockDate, UserName)
on (target.ClockDate = source.ClockDate and target.UserName = source.UserName)
when matched then
update
set BreakOut = getdate()
when not matched then
insert (ClockDate, UserName, BreakOut)
values (getdate(), source.UserName, getdate());
Every datetime field in input/output needs to be in UNIX/epoch format. This avoids the confusion between developers across different sides of the API.
Pros:
Cons:
Notes:
You have duplicated export default
declaration. The first one get overridden by second one which is actually a function.
The reason this occurs is because the file is stored in the "cache" of the browser – so there is no need for the browser to request the sheet again. This occurs for most files that your HTML links to – whether they're CDNs or on your server, for example, a stylesheet. A hard refresh will reload the page and send new GET requests to the server (and to external b if needed).
You can also empty the caches in most browsers with the following keyboard shortcuts.
Safari: Cmd+Alt+e
Chrome and Edge: Shift+Cmd+Delete (Mac) and Ctrl+Shift+Del (Windows)
You can find everything you need to know about Gradle here: Gradle Plugin User Guide
Goals of the new Build System
The goals of the new build system are:
- Make it easy to reuse code and resources
- Make it easy to create several variants of an application, either for multi-apk distribution or for different flavors of an application
- Make it easy to configure, extend and customize the build process
- Good IDE integration
Why Gradle?
Gradle is an advanced build system as well as an advanced build toolkit allowing to create custom build logic through plugins.
Here are some of its features that made us choose Gradle:
- Domain Specific Language (DSL) to describe and manipulate the build logic
- Build files are Groovy based and allow mixing of declarative elements through the DSL and using code to manipulate the DSL elements to provide custom logic.
- Built-in dependency management through Maven and/or Ivy.
- Very flexible. Allows using best practices but doesn’t force its own way of doing things.
- Plugins can expose their own DSL and their own API for build files to use.
- Good Tooling API allowing IDE integration
How to reproduce that error:
#include <iostream>
#include <stdlib.h>
#include <string>
#include <thread>
using namespace std;
void task1(std::string msg){
cout << "task1 says: " << msg;
}
int main() {
std::thread t1(task1, "hello");
return 0;
}
Compile and run:
el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
el@defiant ~/foo4/39_threading $ ./s
terminate called without an active exception
Aborted (core dumped)
You get that error because you didn't join or detach your thread.
One way to fix it, join the thread like this:
#include <iostream>
#include <stdlib.h>
#include <string>
#include <thread>
using namespace std;
void task1(std::string msg){
cout << "task1 says: " << msg;
}
int main() {
std::thread t1(task1, "hello");
t1.join();
return 0;
}
Then compile and run:
el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
el@defiant ~/foo4/39_threading $ ./s
task1 says: hello
The other way to fix it, detach it like this:
#include <iostream>
#include <stdlib.h>
#include <string>
#include <unistd.h>
#include <thread>
using namespace std;
void task1(std::string msg){
cout << "task1 says: " << msg;
}
int main()
{
{
std::thread t1(task1, "hello");
t1.detach();
} //thread handle is destroyed here, as goes out of scope!
usleep(1000000); //wait so that hello can be printed.
}
Compile and run:
el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
el@defiant ~/foo4/39_threading $ ./s
task1 says: hello
Read up on detaching C++ threads and joining C++ threads.
I think, you need to check your proxy settings in "internet options". If you are using proxy/'hide ip' applications, this problem may be occurs.
I used the not()
CSS operator and jQuery's addClass()
function. Here is an example, when you click on a list item, it won't hover anymore:
For example:
HTML
<ul class="vegies">
<li>Onion</li>
<li>Potato</li>
<li>Lettuce</li>
<ul>
CSS
.vegies li:not(.no-hover):hover { color: blue; }
jQuery
$('.vegies li').click( function(){
$(this).addClass('no-hover');
});
You need to make sure and have the following:
#include <windows.h>
and not this:
#include "windows.h"
If that's not the problem, then check RichieHindle's response.
Let's say I have a dictionary D
with the elements below. To sort, just use the key argument in sorted
to pass a custom function as below:
D = {'eggs': 3, 'ham': 1, 'spam': 2}
def get_count(tuple):
return tuple[1]
sorted(D.items(), key = get_count, reverse=True)
# Or
sorted(D.items(), key = lambda x: x[1], reverse=True) # Avoiding get_count function call
Check this out.
//Response being your httpwebresponse
Dim str_StatusCode as String = CInt(Response.StatusCode)
Console.Writeline(str_StatusCode)
In my case I was using ClassName
.
getComputedStyle( document.getElementsByClassName(this_id)) //error
It will also work without 2nd argument " "
.
Here is my complete running code :
function changeFontSize(target) {
var minmax = document.getElementById("minmax");
var computedStyle = window.getComputedStyle
? getComputedStyle(minmax) // Standards
: minmax.currentStyle; // Old IE
var fontSize;
if (computedStyle) { // This will be true on nearly all browsers
fontSize = parseFloat(computedStyle && computedStyle.fontSize);
if (target == "sizePlus") {
if(fontSize<20){
fontSize += 5;
}
} else if (target == "sizeMinus") {
if(fontSize>15){
fontSize -= 5;
}
}
minmax.style.fontSize = fontSize + "px";
}
}
onclick= "changeFontSize(this.id)"
<?xml version="1.0"?>
<configuration>
<appSettings>
<!--FailIfMissing=false -->
<add key="DbSQLite" value="data source=|DataDirectory|DB.db3;Pooling=true;FailIfMissing=false"/>
</appSettings>
</configuration>
Here's my 2 cents:
IEnumerable<string> Split(string str, int chunkSize)
{
while (!string.IsNullOrWhiteSpace(str))
{
var chunk = str.Take(chunkSize).ToArray();
str = str.Substring(chunk.Length);
yield return new string(chunk);
}
}//Split
Your code works, but the fadeIn
doesn't, because it's already visible. I think the effect you want to achieve is: fadeOut
→ load
→ fadeIn
:
var auto_refresh = setInterval(function () {
$('.View').fadeOut('slow', function() {
$(this).load('/echo/json/', function() {
$(this).fadeIn('slow');
});
});
}, 15000); // refresh every 15000 milliseconds
Try it here: http://jsfiddle.net/kelunik/3qfNn/1/
Additional notice: As Khanh TO mentioned, you may need to get rid of the browser's internal cache. You can do so using $.ajax
and $.ajaxSetup ({ cache: false });
or the random-hack, he mentioned.
Standard letter-based representations of date parts are great, except the fact they're not so intuitive. The much more convenient way is to identify basic abstractions and a number of specific implementations. Besides, with this approach, you can benefir from autocompletion.
Since we're talking about datetimes here, it seems plausible that the basic abstraction is ISO8601DateTime
. One of the specific implementations is current datetime, the one you need when a makes a request to your backend, hence Now()
class. Second one which is of some use for you is a datetime adjusted to some timezone. Not surprisingly, it's called AdjustedAccordingToTimeZone
. And finally, you need a day of the week in a passed datetime's timezone: there is a LocalDayOfWeek
class for that. So the code looks like the following:
(new LocalDayOfWeek(
new AdjustedAccordingToTimeZone(
new Now(),
new TimeZoneFromString($_POST['timezone'])
)
))
->value();
For more about this approach, take a look here.
Due to PermGen removal some options were removed (like -XX:MaxPermSize
), but options -Xms
and -Xmx
work in Java 8. It's possible that under Java 8 your application simply needs somewhat more memory. Try to increase -Xmx
value. Alternatively you can try to switch to G1 garbage collector using -XX:+UseG1GC
.
Note that if you use any option which was removed in Java 8, you will see a warning upon application start:
$ java -XX:MaxPermSize=128M -version
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b18)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
You can use the BytesIO
class to get a wrapper around strings that behaves like a file. The BytesIO
object provides the same interface as a file, but saves the contents just in memory:
import io
with io.BytesIO() as output:
image.save(output, format="GIF")
contents = output.getvalue()
You have to explicitly specify the output format with the format
parameter, otherwise PIL will raise an error when trying to automatically detect it.
If you loaded the image from a file it has a format
parameter that contains the original file format, so in this case you can use format=image.format
.
In old Python 2 versions before introduction of the io
module you would have used the StringIO
module instead.
You're importing invalid R class, import yourpackage.R class for example com.example.R
what actully happends that u import android.R class not yourpackages.R
As of right now, I do not know of any. It appears the code academy folks have set their sites on Ruby on Rails. They do not rule Java out of the picture however.
<select class="form-control" name="kategori_id">
<option value="">-- PILIH --</option>
@foreach($kategori as $id => $nama)
@if(old('kategori_id', $produk->kategori_id) == $id )
<option value="{{ $id }}" selected>{{ $nama }}</option>
@else
<option value="{{ $id }}">{{ $nama }}</option>
@endif
@endforeach
</select>
You cannot define a free function inside another in C++.
This is how you get around that in an easy non-complicated way.
Instead of using sheet(x).range
use Activesheet.range("range").select
OK, after days struggling with this issue, I finally fixed it.
Simple!
Apparently there was a permission error with my local system that the C# compiler (csc.exe) could not access some resources and source codes.
In order to change your AppPool identity follow steps given here: http://learn.iis.net/page.aspx/624/application-pool-identities/
I ran into this page while wondering the same question.
As others have noted, it's simple enough to just grab the __name__
attribute from a function in order to determine the name of the function. It's marginally trickier with objects that don't have a sane way to determine __name__
, i.e. base/primitive objects like basestring instances, ints, longs, etc.
Long story short, you could probably use the inspect module to make an educated guess about which one it is, but you would have to probably know what frame you're working in/traverse down the stack to find the right one. But I'd hate to imagine how much fun this would be trying to deal with eval/exec'ed code.
% python2 whats_my_name_again.py
needle => ''b''
['a', 'b']
[]
needle => '<function foo at 0x289d08ec>'
['c']
['foo']
needle => '<function bar at 0x289d0bfc>'
['f', 'bar']
[]
needle => '<__main__.a_class instance at 0x289d3aac>'
['e', 'd']
[]
needle => '<function bar at 0x289d0bfc>'
['f', 'bar']
[]
%
whats_my_name_again.py:
#!/usr/bin/env python
import inspect
class a_class:
def __init__(self):
pass
def foo():
def bar():
pass
a = 'b'
b = 'b'
c = foo
d = a_class()
e = d
f = bar
#print('globals', inspect.stack()[0][0].f_globals)
#print('locals', inspect.stack()[0][0].f_locals)
assert(inspect.stack()[0][0].f_globals == globals())
assert(inspect.stack()[0][0].f_locals == locals())
in_a_haystack = lambda: value == needle and key != 'needle'
for needle in (a, foo, bar, d, f, ):
print("needle => '%r'" % (needle, ))
print([key for key, value in locals().iteritems() if in_a_haystack()])
print([key for key, value in globals().iteritems() if in_a_haystack()])
foo()
The default value parameter expansion is often useful in build scripts like the example one below. If the user just calls the script as-is, perl will not be built in. The user has to explicitly set WITH_PERL
to a value other than "no" to have it built in.
$ cat defvar.sh
#!/bin/bash
WITH_PERL=${WITH_PERL:-no}
if [[ "$WITH_PERL" != no ]]; then
echo "building with perl"
# ./configure --enable=perl
else
echo "not building with perl"
# ./configure
fi
Build without Perl
$ ./defvar.sh
not building with perl
Build with Perl
$ WITH_PERL=yes ./defvar.sh
building with perl
if (args[i] == "&")
Ok, let's disect what this does.
args is an array of pointers. So, here you are comparing args[i]
(a pointer) to "&"
(also a pointer). Well, the only way this will every be true is if somewhere you have args[i]="&"
and even then, "&"
is not guaranteed to point to the same place everywhere.
I believe what you are actually looking for is either strcmp
to compare the entire string or your wanting to do if (*args[i] == '&')
to compare the first character of the args[i]
string to the &
character
The phpqrcode library is really fast to configure and the API documentation is easy to understand.
In addition to abaumg's answer I have attached 2 examples in PHP
from http://phpqrcode.sourceforge.net/examples/index.php
1. QR code encoder
first include the library from your local path
include('../qrlib.php');
then to output the image directly as PNG stream do for example:
QRcode::png('your texte here...');
to save the result locally as a PNG image:
$tempDir = EXAMPLE_TMP_SERVERPATH;
$codeContents = 'your message here...';
$fileName = 'qrcode_name.png';
$pngAbsoluteFilePath = $tempDir.$fileName;
$urlRelativeFilePath = EXAMPLE_TMP_URLRELPATH.$fileName;
QRcode::png($codeContents, $pngAbsoluteFilePath);
2. QR code decoder
See also the zxing decoder:
http://zxing.org/w/decode.jspx
Pretty useful to check the output.
3. List of Data format
A list of data format you can use in your QR code according to the data type :
http://
)In Visual Studio 2019 you can find cl.exe inside
32-BIT : C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx86\x86
64-BIT : C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64
Before trying to compile either run vcvars32 for 32-Bit compilation or vcvars64 for 64-Bit.
32-BIT : "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
64-BIT : "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
If you can't find the file or the directory, try going to C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC
and see if you can find a folder with a version number. If you can't, then you probably haven't installed C++ through the Visual Studio Installation yet.
I'm using this since the begin and it always work. =)
System.setProperty("webdriver.chrome.driver", "C:\\pathto\\my\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("http://www.google.com");
edit your ~/.vimrc
$ vim ~/.vimrc
add following lines :
set tabstop=4
set shiftwidth=4
set softtabstop=4
set expandtab
JavaScript only has a Number type that stores floating point values.
There is no int.
Edit:
If you want to format the number as a string with two digits after the decimal point use:
(4).toFixed(2)
Instead of Tick
event, use Elapsed
event.
timer.Elapsed += new EventHandler(TimerEventProcessor);
and change the signiture of TimerEventProcessor method;
private void TimerEventProcessor(object sender, ElapsedEventArgs e)
{
label1.Text = _counter.ToString();
_counter += 1;
}
Actually, you can always test it by yourself.
CREATE TABLE CUSTOMERS
(
CUSTOMER_ID NUMBER NOT NULL,
JOIN_DATE DATE NOT NULL,
CUSTOMER_STATUS VARCHAR2(8) NOT NULL,
CUSTOMER_NAME VARCHAR2(20) NOT NULL,
CREDITRATING VARCHAR2(10)
)
;
select column_name, data_type, nullable, data_length, data_precision, data_scale from user_tab_columns where table_name ='CUSTOMERS';
A really simple solution is not to use an A tag - use a span instead:
<span class='link' (click)="doSomething()">Click here</span>
span.link {
color: blue;
cursor: pointer;
text-decoration: underline;
}
Is your image on the same folder/directory as your css file? If so, your image url is correct. Otherwise, it's not.
If by any chance your folder structure is like so...
webpage
-index.html
-css
- - style.css
- images
- - background.png
then to reference the image on your css file you should use the following path:
../images/background.png
So that would be background: url('../images/background.png');
The logic is simple: Go up one folder by typing "../" (as many times as you need). Go down one folder by specifying the folder you wish to go down to.
Interval is constant:
int range = 5
int newNumber = number / range;
switch (newNumber)
{
case (0): //number 0 to 4
break;
case (1): //number 5 to 9
break;
case (2): //number 10 to 14
break;
default: break;
}
Otherwise:
if else
You can use the struct's pack:
In [11]: struct.pack(">I", 1)
Out[11]: '\x00\x00\x00\x01'
The ">" is the byte-order (big-endian) and the "I" is the format character. So you can be specific if you want to do something else:
In [12]: struct.pack("<H", 1)
Out[12]: '\x01\x00'
In [13]: struct.pack("B", 1)
Out[13]: '\x01'
This works the same on both python 2 and python 3.
Note: the inverse operation (bytes to int) can be done with unpack.
Starting with a set of bytes which encode a string using UTF-8, creates a string from that data, then get some bytes encoding the string in a different encoding:
byte[] utf8bytes = { (byte)0xc3, (byte)0xa2, 0x61, 0x62, 0x63, 0x64 };
Charset utf8charset = Charset.forName("UTF-8");
Charset iso88591charset = Charset.forName("ISO-8859-1");
String string = new String ( utf8bytes, utf8charset );
System.out.println(string);
// "When I do a getbytes(encoding) and "
byte[] iso88591bytes = string.getBytes(iso88591charset);
for ( byte b : iso88591bytes )
System.out.printf("%02x ", b);
System.out.println();
// "then create a new string with the bytes in ISO-8859-1 encoding"
String string2 = new String ( iso88591bytes, iso88591charset );
// "I get a two different chars"
System.out.println(string2);
this outputs strings and the iso88591 bytes correctly:
âabcd
e2 61 62 63 64
âabcd
So your byte array wasn't paired with the correct encoding:
String failString = new String ( utf8bytes, iso88591charset );
System.out.println(failString);
Outputs
âabcd
(either that, or you just wrote the utf8 bytes to a file and read them elsewhere as iso88591)
I know the thread is already all, but as I was checking through I've come up with a solution (code listed below). Hope it can help.
#include <iostream>
#include <vector>
class Box
{
public:
static int BoxesTotal;
static int BoxesEver;
int Id;
Box()
{
++BoxesTotal;
++BoxesEver;
Id = BoxesEver;
std::cout << "Box (" << Id << "/" << BoxesTotal << "/" << BoxesEver << ") initialized." << std::endl;
}
~Box()
{
std::cout << "Box (" << Id << "/" << BoxesTotal << "/" << BoxesEver << ") ended." << std::endl;
--BoxesTotal;
}
};
int Box::BoxesTotal = 0;
int Box::BoxesEver = 0;
int main(int argc, char* argv[])
{
std::cout << "Objects (Boxes) example." << std::endl;
std::cout << "------------------------" << std::endl;
std::vector <Box*> BoxesTab;
Box* Indicator;
for (int i = 1; i<4; ++i)
{
std::cout << "i = " << i << ":" << std::endl;
Box* Indicator = new(Box);
BoxesTab.push_back(Indicator);
std::cout << "Adres Blowera: " << BoxesTab[i-1] << std::endl;
}
std::cout << "Summary" << std::endl;
std::cout << "-------" << std::endl;
for (int i=0; i<3; ++i)
{
std::cout << "Adres Blowera: " << BoxesTab[i] << std::endl;
}
std::cout << "Deleting" << std::endl;
std::cout << "--------" << std::endl;
for (int i=0; i<3; ++i)
{
std::cout << "Deleting Box: " << i+1 << " (" << BoxesTab[i] << ") " << std::endl;
Indicator = (BoxesTab[i]);
delete(Indicator);
}
return 0;
}
And the result it produces is:
Objects (Boxes) example.
------------------------
i = 1:
Box (1/1/1) initialized.
Adres Blowera: 0xdf8ca0
i = 2:
Box (2/2/2) initialized.
Adres Blowera: 0xdf8ce0
i = 3:
Box (3/3/3) initialized.
Adres Blowera: 0xdf8cc0
Summary
-------
Adres Blowera: 0xdf8ca0
Adres Blowera: 0xdf8ce0
Adres Blowera: 0xdf8cc0
Deleting
--------
Deleting Box: 1 (0xdf8ca0)
Box (1/3/3) ended.
Deleting Box: 2 (0xdf8ce0)
Box (2/2/3) ended.
Deleting Box: 3 (0xdf8cc0)
Box (3/1/3) ended.
Here you go: ES5
var test = 'Hello World';
if( test.indexOf('World') >= 0){
// Found world
}
With ES6 best way would be to use includes
function to test if the string contains the looking work.
const test = 'Hello World';
if (test.includes('World')) {
// Found world
}
Change this dialog.cancel();
to dialog.dismiss();
The solution is to call dismiss()
on the Dialog
you created in NetErrorPage.java:114 before exiting the Activity
, e.g. in onPause()
.
Views have a reference to their parent Context
(taken from constructor argument). If you leave an Activity
without destroying Dialog
s and other dynamically created View
s, they still hold this reference to your Activity
(if you created with this as Context
: like new ProgressDialog(this)
), so it cannot be collected by the GC, causing a memory leak.
In general, in C++ functions have to be declared before you call them. So sometime before the definition of getSkewNormal()
, the compiler needs to see the declaration:
double integrate (double start, double stop, int numSteps, Evaluatable evalObj);
Mostly what people do is put all the declarations (only) in the header file, and put the actual code -- the definitions of the functions and methods -- into a separate source (*.cc
or *.cpp
) file. This neatly solves the problem of needing all the functions to be declared.
Depends on application, really.
Consider setting a timestamp by a user to a server in New York, for an appointment in Sanghai. Now when the user connects in Sanghai, he accesses the same appointment timestamp from a mirrored server in Tokyo. He will see the appointment in Tokyo time, offset from the original New York time.
So for values that represent user time like an appointment or a schedule, datetime is better. It allows the user to control the exact date and time desired, regardless of the server settings. The set time is the set time, not affected by the server's time zone, the user's time zone, or by changes in the way daylight savings time is calculated (yes it does change).
On the other hand, for values that represent system time like payment transactions, table modifications or logging, always use timestamps. The system will not be affected by moving the server to another time zone, or when comparing between servers in different timezones.
Timestamps are also lighter on the database and indexed faster.
Whenever you pass a string of HTML to any of jQuery's methods, this is what happens:
A temporary element is created, let's call it x. x's innerHTML
is set to the string of HTML that you've passed. Then jQuery will transfer each of the produced nodes (that is, x's childNodes
) over to a newly created document fragment, which it will then cache for next time. It will then return the fragment's childNodes
as a fresh DOM collection.
Note that it's actually a lot more complicated than that, as jQuery does a bunch of cross-browser checks and various other optimisations. E.g. if you pass just <div></div>
to jQuery()
, jQuery will take a shortcut and simply do document.createElement('div')
.
EDIT: To see the sheer quantity of checks that jQuery performs, have a look here, here and here.
innerHTML
is generally the faster approach, although don't let that govern what you do all the time. jQuery's approach isn't quite as simple as element.innerHTML = ...
-- as I mentioned, there are a bunch of checks and optimisations occurring.
The correct technique depends heavily on the situation. If you want to create a large number of identical elements, then the last thing you want to do is create a massive loop, creating a new jQuery object on every iteration. E.g. the quickest way to create 100 divs with jQuery:
jQuery(Array(101).join('<div></div>'));
There are also issues of readability and maintenance to take into account.
This:
$('<div id="' + someID + '" class="foobar">' + content + '</div>');
... is a lot harder to maintain than this:
$('<div/>', {
id: someID,
className: 'foobar',
html: content
});
The modern event handling method:
element.addEventListener('click', startDragDrop, false);
element.addEventListener('click', spyOnUser, false);
The first argument is the event, the second is the function and the third specifies whether to allow event bubbling.
From QuirksMode:
W3C’s DOM Level 2 Event specification pays careful attention to the problems of the traditional model. It offers a simple way to register as many event handlers as you like for the same event on one element.
The key to the W3C event registration model is the method
addEventListener()
. You give it three arguments: the event type, the function to be executed and a boolean (true or false) that I’ll explain later on. To register our well known doSomething() function to the onclick of an element you do:
Full details here: http://www.quirksmode.org/js/events_advanced.html
Using jQuery
if you're using jQuery, there is a nice API for event handling:
$('#myElement').bind('click', function() { doStuff(); });
$('#myElement').bind('click', function() { doMoreStuff(); });
$('#myElement').bind('click', doEvenMoreStuff);
Full details here: http://api.jquery.com/category/events/
The formula for French Excel:
=CONCATENER(
DECHEX(ALEA.ENTRE.BORNES(0;4294967295);8);"-";
DECHEX(ALEA.ENTRE.BORNES(0;42949);4);"-";
DECHEX(ALEA.ENTRE.BORNES(0;42949);4);"-";
DECHEX(ALEA.ENTRE.BORNES(0;42949);4);"-";
DECHEX(ALEA.ENTRE.BORNES(0;4294967295);8);
DECHEX(ALEA.ENTRE.BORNES(0;42949);4))
As noted by Josh M, this does not provide a compliant GUID however, but this works well for my current need.
Simply casting to List<TestB>
almost works; but it doesn't work because you can't cast a generic type of one parameter to another. However, you can cast through an intermediate wildcard type and it will be allowed (since you can cast to and from wildcard types, just with an unchecked warning):
List<TestB> variable = (List<TestB>)(List<?>) collectionOfListA;
When using SQL Express, you need to specify \SQLExpress instance in your connection string:
string str = "Data Source=HARIHARAN-PC\\SQLEXPRESS;Initial Catalog=master;Integrated Security=True" ;
function zfill(num, len) {return (Array(len).join("0") + num).slice(-len);}
Having run both queries on a SQL Server 2012 instance, I can confirm the first query was fastest in my case.
The query with the LIKE
keyword showed a clustered index scan.
The CONTAINS
also had a clustered index scan with additional operators for the full text match and a merge join.
scala> val arr = Array("Hello","World")
arr: Array[java.lang.String] = Array(Hello, World)
A handy timestamp format:
%date:~3,2%/%date:~0,2%/%date:~6,2%-%time:~0,8%
Keep in mind that there are processes on the database which may not currently support a session.
If you're interested in all processes you'll want to look to v$process (or gv$process on RAC)
Here is my code, it might be sloppy but it seems to work for me anyway.
# a is the number you want the inverse for
# b is the modulus
def mod_inverse(a, b):
r = -1
B = b
A = a
eq_set = []
full_set = []
mod_set = []
#euclid's algorithm
while r!=1 and r!=0:
r = b%a
q = b//a
eq_set = [r, b, a, q*-1]
b = a
a = r
full_set.append(eq_set)
for i in range(0, 4):
mod_set.append(full_set[-1][i])
mod_set.insert(2, 1)
counter = 0
#extended euclid's algorithm
for i in range(1, len(full_set)):
if counter%2 == 0:
mod_set[2] = full_set[-1*(i+1)][3]*mod_set[4]+mod_set[2]
mod_set[3] = full_set[-1*(i+1)][1]
elif counter%2 != 0:
mod_set[4] = full_set[-1*(i+1)][3]*mod_set[2]+mod_set[4]
mod_set[1] = full_set[-1*(i+1)][1]
counter += 1
if mod_set[3] == B:
return mod_set[2]%B
return mod_set[4]%B
The code creates an anonymous function, and then immediately runs it. Similar to:
var temp = function() {
// init part
}
temp();
The purpose of this construction is to create a scope for the code inside the function. You can declare varaibles and functions inside the scope, and those will be local to that scope. That way they don't clutter up the global scope, which minimizes the risk for conflicts with other scripts.
Make all the checkboxes required
and add a change listener
. If any one checkbox is ticked, remove required
attribute from all the checkboxes. Below is a sample code.
<div class="form-group browsers">
<label class="control-label col-md-4" for="optiontext">Select an option</label>
<div class="col-md-6">
<input type="checkbox" name="browser" value="Chrome" required/> Google Chrome<br>
<input type="checkbox" name="browser" value="IE" required/> Internet Explorer<br>
<input type="checkbox" name="browser" value="Mozilla" required/> Mozilla Firefox<br>
<input type="checkbox" name="browser" value="Edge" required/> Microsoft Edge
</div>
</div>
Change listener :
$(function(){
var requiredCheckboxes = $('.browsers :checkbox[required]');
requiredCheckboxes.change(function(){
if(requiredCheckboxes.is(':checked')) {
requiredCheckboxes.removeAttr('required');
} else {
requiredCheckboxes.attr('required', 'required');
}
});
});
You will need a reference to the specific frame you want to close but assuming you have the reference dispose()
should close the frame.
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
frameToClose.dispose();
}
});
$? is the result (exit code) of the last executed command.
You can also use $.parseJSON(data)
that will explicit convert a string thats come from a PHP script to a real JSON array.
Swift 1.2 and iOS 8
Create custom directory (name = "MyCustomData") inside the documents directory but only if the directory does not exist.
// path to documents directory
let documentDirectoryPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first as! String
// create the custom folder path
let myCustomDataDirectoryPath = documentDirectoryPath.stringByAppendingPathComponent("/MyCustomData")
// check if directory does not exist
if NSFileManager.defaultManager().fileExistsAtPath(myCustomDataDirectoryPath) == false {
// create the directory
var createDirectoryError: NSError? = nil
NSFileManager.defaultManager().createDirectoryAtPath(myCustomDataDirectoryPath, withIntermediateDirectories: false, attributes: nil, error: &createDirectoryError)
// handle the error, you may call an exception
if createDirectoryError != nil {
println("Handle directory creation error...")
}
}
echo stat | nc localhost 2181 | grep Mode
echo srvr | nc localhost 2181 | grep Mode #(From 3.3.0 onwards)
Above will work in whichever modes Zookeeper is running (standalone or embedded).
If zookeeper is running in standalone mode, its a JVM process. so -
jps | grep Quorum
will display list of jvm processes; something like this for zookeeper with process ID
HQuorumPeer
I have created the following class and used across the application wherever required in place of GridView
:
/// <summary>
/// Represents a view mode that displays data items in columns for a System.Windows.Controls.ListView control with auto sized columns based on the column content
/// </summary>
public class AutoSizedGridView : GridView
{
protected override void PrepareItem(ListViewItem item)
{
foreach (GridViewColumn column in Columns)
{
// Setting NaN for the column width automatically determines the required
// width enough to hold the content completely.
// If the width is NaN, first set it to ActualWidth temporarily.
if (double.IsNaN(column.Width))
column.Width = column.ActualWidth;
// Finally, set the column with to NaN. This raises the property change
// event and re computes the width.
column.Width = double.NaN;
}
base.PrepareItem(item);
}
}
dev.off() is the best function, but it clears also all plots. If you want to keep plots in your window, at the beginning save default par settings:
def.par = par()
Then when you use your par functions you still have a backup of default par settings. Later on, after generating plots, finish with:
par(def.par) #go back to default par settings
With this, you keep generated plots and reset par settings.
To clarify the terminology right: arrays are fixed length structures (and the length of an existing cannot be altered) the expression add at the end is meaningless (by itself).
What you can do is create a new array one element larger and fill in the new element in the last slot:
public static int[] append(int[] array, int value) {
int[] result = Arrays.copyOf(array, array.length + 1);
result[result.length - 1] = value;
return result;
}
This quickly gets inefficient, as each time append is called a new array is created and the old array contents is copied over.
One way to drastically reduce the overhead is to create a larger array and keep track of up to which index it is actually filled. Adding an element becomes as simple a filling the next index and incrementing the index. If the array fills up completely, a new array is created with more free space.
And guess what ArrayList does: exactly that. So when a dynamically sized array is needed, ArrayList is a good choice. Don't reinvent the wheel.
Hello I have adapted Winista.MimeDetect project into .net core/framework with fallback into urlmon.dll Fell free to use it: nuget package.
//init
var mimeTypes = new MimeTypes();
//usage by filepath
var mimeType1 = mimeTypes.GetMimeTypeFromFile(filePath);
It is a generic type parameter, see Generics documentation.
T
is not a reserved keyword. T
, or any given name, means a type parameter. Check the following method (just as a simple example).
T GetDefault<T>()
{
return default(T);
}
Note that the return type is T
. With this method you can get the default value of any type by calling the method as:
GetDefault<int>(); // 0
GetDefault<string>(); // null
GetDefault<DateTime>(); // 01/01/0001 00:00:00
GetDefault<TimeSpan>(); // 00:00:00
.NET uses generics in collections, ... example:
List<int> integerList = new List<int>();
This way you will have a list that only accepts integers, because the class is instancited with the type T
, in this case int
, and the method that add elements is written as:
public class List<T> : ...
{
public void Add(T item);
}
Some more information about generics.
You can limit the scope of the type T
.
The following example only allows you to invoke the method with types that are classes:
void Foo<T>(T item) where T: class
{
}
The following example only allows you to invoke the method with types that are Circle
or inherit from it.
void Foo<T>(T item) where T: Circle
{
}
And there is new()
that says you can create an instance of T
if it has a parameterless constructor. In the following example T
will be treated as Circle
, you get intellisense...
void Foo<T>(T item) where T: Circle, new()
{
T newCircle = new T();
}
As T
is a type parameter, you can get the object Type
from it. With the Type
you can use reflection...
void Foo<T>(T item) where T: class
{
Type type = typeof(T);
}
As a more complex example, check the signature of ToDictionary
or any other Linq method.
public static Dictionary<TKey, TSource> ToDictionary<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector);
There isn't a T
, however there is TKey
and TSource
. It is recommended that you always name type parameters with the prefix T
as shown above.
You could name TSomethingFoo
if you want to.
However, the code below allows spaces.
No, it doesn't. However, it will only match on input with a length of 1. For inputs with a length greater than or equal to 1, you need a +
following the character class:
var regexp = /^[a-zA-Z0-9-_]+$/;
var check = "checkme";
if (check.search(regexp) === -1)
{ alert('invalid'); }
else
{ alert('valid'); }
Note that neither the -
(in this instance) nor the _
need escaping.
I don't think this is possible in Sequelize's order clause, because as far as I can tell, those clauses are meant to be binary operations applicable to every element in your list. (This makes sense, too, as it's generally how sorting a list works.)
So, an order clause can do something like order a list by recursing over it asking "which of these 2 elements is older?" Whereas your ordering is not reducible to a binary operation (compare_bigger(1,2) => 2
) but is just an arbitrary sequence (2,4,11,2,9,0
).
When I hit this issue with findAll
, here was my solution (sub in your returned results for numbers
):
var numbers = [2, 20, 23, 9, 53];
var orderIWant = [2, 23, 20, 53, 9];
orderIWant.map(x => { return numbers.find(y => { return y === x })});
Which returns [2, 23, 20, 53, 9]
. I don't think there's a better tradeoff we can make. You could iterate in place over your ordered ids with findOne
, but then you're doing n queries when 1 will do.
Similar to paxdiablo above. This code, inserted in a wider app, works fine with STM32 NUCLEO-F446RE.
#include <stdio.h>
#include <math.h>
#include <string.h>
void IntegFract(char *pcIntegStr, char *pcFractStr, double dbValue, int iPrecis);
main()
{
char acIntegStr[9], acFractStr[9], char counter_buff[30];
double seconds_passed = 123.0567;
IntegFract(acIntegStr, acFractStr, seconds_passed, 3);
sprintf(counter_buff, "Time: %s.%s Sec", acIntegStr, acFractStr);
}
void IntegFract(char *pcIntegStr, char *pcFractStr, double dbValue, int
iPrecis)
{
int iIntegValue = dbValue;
int iFractValue = (dbValue - iIntegValue) * pow(10, iPrecis);
itoa(iIntegValue, pcIntegStr, 10);
itoa(iFractValue, pcFractStr, 10);
size_t length = strlen(pcFractStr);
char acTemp[9] = "";
while (length < iPrecis)
{
strcat(acTemp, "0");
length++;
}
strcat(acTemp, pcFractStr);
strcpy(pcFractStr, acTemp);
}
counter_buff would contain 123.056 .
You can deserialize this really easily. The data's structure in C# is just List<string[]>
so you could just do;
List<string[]> data = JsonConvert.DeserializeObject<List<string[]>>(jsonString);
The above code is assuming you're using json.NET.
EDIT: Note the json is technically an array of string arrays. I prefer to use List<string[]>
for my own declaration because it's imo more intuitive. It won't cause any problems for json.NET, if you want it to be an array of string arrays then you need to change the type to (I think) string[][]
but there are some funny little gotcha's with jagged and 2D arrays in C# that I don't really know about so I just don't bother dealing with it here.
This is rather late to the party, and not really saying anything that hasn't been already said in one form or another, mostly through links above, but I wanted to give a TL;DR recap to those with less attention span:
The date and time of the go format string is very important. It's how Go knows which field is which. They are generally 1-9 left to right as follows:
So, Don't write "01-05-15" as your date format, unless you want "Month-Second-Hour"
(... again, this was basically a summary of above.)
Avoid non-standard compiler extensions and implement it as a completely type-safe macro in pure standard C (ISO 9899:2011).
Solution
#define GENERIC_MAX(x, y) ((x) > (y) ? (x) : (y))
#define ENSURE_int(i) _Generic((i), int: (i))
#define ENSURE_float(f) _Generic((f), float: (f))
#define MAX(type, x, y) \
(type)GENERIC_MAX(ENSURE_##type(x), ENSURE_##type(y))
Usage
MAX(int, 2, 3)
Explanation
The macro MAX creates another macro based on the type
parameter. This control macro, if implemented for the given type, is used to check that both parameters are of the correct type. If the type
is not supported, there will be a compiler error.
If either x or y is not of the correct type, there will be a compiler error in the ENSURE_
macros. More such macros can be added if more types are supported. I've assumed that only arithmetic types (integers, floats, pointers etc) will be used and not structs or arrays etc.
If all types are correct, the GENERIC_MAX macro will be called. Extra parenthesis are needed around each macro parameter, as the usual standard precaution when writing C macros.
Then there's the usual problems with implicit type promotions in C. The ?:
operator balances the 2nd and 3rd operand against each other. For example, the result of GENERIC_MAX(my_char1, my_char2)
would be an int
. To prevent the macro from doing such potentially dangerous type promotions, a final type cast to the intended type was used.
Rationale
We want both parameters to the macro to be of the same type. If one of them is of a different type, the macro is no longer type safe, because an operator like ?:
will yield implicit type promotions. And because it does, we also always need to cast the final result back to the intended type as explained above.
A macro with just one parameter could have been written in a much simpler way. But with 2 or more parameters, there is a need to include an extra type parameter. Because something like this is unfortunately impossible:
// this won't work
#define MAX(x, y) \
_Generic((x), \
int: GENERIC_MAX(x, ENSURE_int(y)) \
float: GENERIC_MAX(x, ENSURE_float(y)) \
)
The problem is that if the above macro is called as MAX(1, 2)
with two int
, it will still try to macro-expand all possible scenarios of the _Generic
association list. So the ENSURE_float
macro will get expanded too, even though it isn't relevant for int
. And since that macro intentionally only contains the float
type, the code won't compile.
To solve this, I created the macro name during the pre-processor phase instead, with the ## operator, so that no macro gets accidentally expanded.
Examples
#include <stdio.h>
#define GENERIC_MAX(x, y) ((x) > (y) ? (x) : (y))
#define ENSURE_int(i) _Generic((i), int: (i))
#define ENSURE_float(f) _Generic((f), float: (f))
#define MAX(type, x, y) \
(type)GENERIC_MAX(ENSURE_##type(x), ENSURE_##type(y))
int main (void)
{
int ia = 1, ib = 2;
float fa = 3.0f, fb = 4.0f;
double da = 5.0, db = 6.0;
printf("%d\n", MAX(int, ia, ib)); // ok
printf("%f\n", MAX(float, fa, fb)); // ok
//printf("%d\n", MAX(int, ia, fa)); compiler error, one of the types is wrong
//printf("%f\n", MAX(float, fa, ib)); compiler error, one of the types is wrong
//printf("%f\n", MAX(double, fa, fb)); compiler error, the specified type is wrong
//printf("%f\n", MAX(float, da, db)); compiler error, one of the types is wrong
//printf("%d\n", MAX(unsigned int, ia, ib)); // wont get away with this either
//printf("%d\n", MAX(int32_t, ia, ib)); // wont get away with this either
return 0;
}
There are several ways of consoling out the variable within a string.
Method 1 :
console.log("story", name, "story");
Benefit : if name is a JSON object, it will not be printed as "story" [object Object] "story"
Method 2 :
console.log("story " + name + " story");
Method 3: When using ES6 as mentioned above
console.log(`story ${name} story`);
Benefit: No need of extra , or +
Method 4:
console.log('story %s story',name);
Benefit: the string becomes more readable.
$M2_HOME
is used sometimes, for example, to install Takari Extensions for Apache Maven
One way to find $M2_HOME
value is to search for mvn
:
sudo find / -name "mvn" 2>/dev/null
And, probably it will be: /opt/maven/
Edit: due to post-tag 'oracle', the first two queries become irrelevant, leaving 3rd query for oracle.
For MySQL:
SELECT YEAR(ASOFDATE) FROM PASOFDATE
Editted: In anycase if your date is a String, let's convert it into a proper date format. And select the year out of it.
SELECT YEAR(STR_TO_DATE(ASOFDATE, '%d-%b-%Y')) FROM PSASOFDATE
Since you are trying Toad, can you check the following code:
For Oracle:
SELECT EXTRACT (TO_DATE(YEAR, 'MM/DD/YY') FROM ASOFDATE) FROM PSASOFDATE;
I solved the problem by uninstalling NodeJs and gulp then re-installing both again.
To install gulp globally I executed the following command
npm install -g gulp
To remove an item from a text file, first move all the text to a list and remove whichever item you want. Then write the text stored in the list into a text file:
List<string> quotelist=File.ReadAllLines(filename).ToList();
string firstItem= quotelist[0];
quotelist.RemoveAt(0);
File.WriteAllLines(filename, quotelist.ToArray());
return firstItem;
you should remove the vars from the function:
x = x * cs - y * sn; // now x is something different than original vector x
y = x * sn + y * cs;
create new coordinates becomes, to avoid calculation of x before it reaches the second line:
px = x * cs - y * sn;
py = x * sn + y * cs;
Have a wrapper around your program that does the following.
import sys
req_version = (2,5)
cur_version = sys.version_info
if cur_version >= req_version:
import myApp
myApp.run()
else:
print "Your Python interpreter is too old. Please consider upgrading."
You can also consider using sys.version()
, if you plan to encounter people who are using pre-2.0 Python interpreters, but then you have some regular expressions to do.
And there might be more elegant ways to do this.
Try this :
sc delete Apache2.4
or try this :
C:\Apache24\bin>httpd -k uninstall
hope this will be helpful
Just go to the (app level) build.gradle
file, give an empty space somewhere and click on sync, once gradle shows sync complete then the Error will be gone
Put the .jar
files in libs
folder of the Android project.
Then add this line of code in the app's gradle file:
compile fileTree(dir: 'libs', include: ['*.jar'])
For Android gradle plugin 3.0 and later, it is better to use this instead:
implementation fileTree(dir: 'libs', include: ['*.jar'])
ldd -v prints the dependency tree under "Version information:' section. The first block in that section are the direct dependencies of the binary.
You can add property to your model as follows:
public string DetailsClass { get { return Details.Count > 0 ? "show" : "hide" } }
and then your view will be simpler and will contain no logic at all:
<div class="details @Model.DetailsClass"/>
This will work even with many classes and will not render class if it is null:
<div class="@Model.Class1 @Model.Class2"/>
with 2 not null properties will render:
<div class="class1 class2"/>
if class1 is null
<div class=" class2"/>
You could use the @Consumes annotation to get the full body:
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
@Path("doc")
public class BodyResource
{
@POST
@Consumes(MediaType.APPLICATION_XML)
public void post(Document doc) throws TransformerConfigurationException, TransformerException
{
Transformer tf = TransformerFactory.newInstance().newTransformer();
tf.transform(new DOMSource(doc), new StreamResult(System.out));
}
}
Note: Don't forget the "Content-Type: application/xml" header by the request.
Despite answer from CaioToOn above, I still had problems getting this to work initially.
After multiple attempts, finally got it working. Am pasting my final version here - hoping it will benefit somebody else.
<build>
<plugins>
<!--
Copy all Maven Dependencies (-MD) into libMD/ folder to use in classpath via shellscript
-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.8</version>
<executions>
<execution>
<id>copy</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libMD</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<!--
Above maven-dependepcy-plugin gives a validation error in m2e.
To fix that, add the plugin management step below. Per: http://stackoverflow.com/a/12109018
-->
<pluginManagement>
<plugins>
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<versionRange>[2.0,)</versionRange>
<goals>
<goal>copy-dependencies</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
Get-Volume
You will get: DriveLetter, FileSystemLabel, FileSystem, DriveType, HealthStatus, SizeRemaining and Size.
Use the xattr
command. You can inspect the extended attributes:
$ xattr s.7z
com.apple.metadata:kMDItemWhereFroms
com.apple.quarantine
and use the -d
option to delete one extended attribute:
$ xattr -d com.apple.quarantine s.7z
$ xattr s.7z
com.apple.metadata:kMDItemWhereFroms
you can also use the -c
option to remove all extended attributes:
$ xattr -c s.7z
$ xattr s.7z
xattr -h
will show you the command line options, and xattr has a man page.
None of the above worked for me but simply use this:
document.querySelector('.messageCheckbox').checked;
Happy coding.
You need to change the seed.
int main() {
srand(time(NULL));
cout << (rand() % 101);
return 0;
}
the srand
seeding thing is true also for a c
language code.
See also: http://xkcd.com/221/
Even though it's inside of an if
block, the compiler doesn't know that T
is string
.
Therefore, it doesn't let you cast. (For the same reason that you cannot cast DateTime
to string
)
You need to cast to object
, (which any T
can cast to), and from there to string
(since object
can be cast to string
).
For example:
T newT1 = (T)(object)"some text";
string newT2 = (string)(object)t;
You can use the ansible.cfg file, it should look like this (There are other parameters which you might want to include):
[defaults]
inventory = <PATH TO INVENTORY FILE>
remote_user = <YOUR USER>
private_key_file = <PATH TO KEY_FILE>
Hope this saves you some typing
Use the ? symbol (encoded as ⚲
or ⚲
), and rotate it to achieve the desired effect:
<div style="-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);">
⚲
</div>
It rotates a symbol :)
// This Activity will draw a line between two selected points on Map
public class MainActivity extends MapActivity {
MapView myMapView = null;
MapController myMC = null;
GeoPoint geoPoint = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myMapView = (MapView) findViewById(R.id.mapview);
geoPoint = null;
myMapView.setSatellite(false);
String pairs[] = getDirectionData("ahmedabad", "vadodara");
String[] lngLat = pairs[0].split(",");
// STARTING POINT
GeoPoint startGP = new GeoPoint(
(int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double
.parseDouble(lngLat[0]) * 1E6));
myMC = myMapView.getController();
geoPoint = startGP;
myMC.setCenter(geoPoint);
myMC.setZoom(15);
myMapView.getOverlays().add(new DirectionPathOverlay(startGP, startGP));
// NAVIGATE THE PATH
GeoPoint gp1;
GeoPoint gp2 = startGP;
for (int i = 1; i < pairs.length; i++) {
lngLat = pairs[i].split(",");
gp1 = gp2;
// watch out! For GeoPoint, first:latitude, second:longitude
gp2 = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6),
(int) (Double.parseDouble(lngLat[0]) * 1E6));
myMapView.getOverlays().add(new DirectionPathOverlay(gp1, gp2));
Log.d("xxx", "pair:" + pairs[i]);
}
// END POINT
myMapView.getOverlays().add(new DirectionPathOverlay(gp2, gp2));
myMapView.getController().animateTo(startGP);
myMapView.setBuiltInZoomControls(true);
myMapView.displayZoomControls(true);
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
private String[] getDirectionData(String srcPlace, String destPlace) {
String urlString = "http://maps.google.com/maps?f=d&hl=en&saddr="
+ srcPlace + "&daddr=" + destPlace
+ "&ie=UTF8&0&om=0&output=kml";
Log.d("URL", urlString);
Document doc = null;
HttpURLConnection urlConnection = null;
URL url = null;
String pathConent = "";
try {
url = new URL(urlString.toString());
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.connect();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
doc = db.parse(urlConnection.getInputStream());
} catch (Exception e) {
}
NodeList nl = doc.getElementsByTagName("LineString");
for (int s = 0; s < nl.getLength(); s++) {
Node rootNode = nl.item(s);
NodeList configItems = rootNode.getChildNodes();
for (int x = 0; x < configItems.getLength(); x++) {
Node lineStringNode = configItems.item(x);
NodeList path = lineStringNode.getChildNodes();
pathConent = path.item(0).getNodeValue();
}
}
String[] tempContent = pathConent.split(" ");
return tempContent;
}
}
//*****************************************************************************
DirectionPathOverlay
public class DirectionPathOverlay extends Overlay {
private GeoPoint gp1;
private GeoPoint gp2;
public DirectionPathOverlay(GeoPoint gp1, GeoPoint gp2) {
this.gp1 = gp1;
this.gp2 = gp2;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when) {
// TODO Auto-generated method stub
Projection projection = mapView.getProjection();
if (shadow == false) {
Paint paint = new Paint();
paint.setAntiAlias(true);
Point point = new Point();
projection.toPixels(gp1, point);
paint.setColor(Color.BLUE);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(2);
canvas.drawLine((float) point.x, (float) point.y, (float) point2.x,
(float) point2.y, paint);
}
return super.draw(canvas, mapView, shadow, when);
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
// TODO Auto-generated method stub
super.draw(canvas, mapView, shadow);
}
}
Javascript:
window.sumInputs = function() {
var inputs = document.getElementsByTagName('input'),
result = document.getElementById('total'),
sum = 0;
for(var i=0; i<inputs.length; i++) {
var ip = inputs[i];
if (ip.name && ip.name.indexOf("total") < 0) {
sum += parseInt(ip.value) || 0;
}
}
result.value = sum;
}?
Html:
Qty1 : <input type="text" name="qty1" id="qty"/><br>
Qty2 : <input type="text" name="qty2" id="qty"/><br>
Qty3 : <input type="text" name="qty3" id="qty"/><br>
Qty4 : <input type="text" name="qty4" id="qty"/><br>
Qty5 : <input type="text" name="qty5" id="qty"/><br>
Qty6 : <input type="text" name="qty6" id="qty"/><br
Qty7 : <input type="text" name="qty7" id="qty"/><br>
Qty8 : <input type="text" name="qty8" id="qty"/><br>
<br><br>
Total : <input type="text" name="total" id="total"/>
<a href="javascript:sumInputs()">Sum</a>
Example: http://jsfiddle.net/fRd9N/1/
?
Use the next_url
object to get the next 20 images.
In the JSON response there is an pagination
array:
"pagination":{
"next_max_tag_id":"1411892342253728",
"deprecation_warning":"next_max_id and min_id are deprecated for this endpoint; use min_tag_id and max_tag_id instead",
"next_max_id":"1411892342253728",
"next_min_id":"1414849145899763",
"min_tag_id":"1414849145899763",
"next_url":"https:\/\/api.instagram.com\/v1\/tags\/lemonbarclub\/media\/recent?client_id=xxxxxxxxxxxxxxxxxx\u0026max_tag_id=1411892342253728"
}
This is the information on specific API call and the object next_url
shows the URL to get the next 20 pictures so just take that URL and call it for the next 20 pictures.
For more information about the Instagram API check out this blogpost: Getting Friendly With Instagram’s API
From http://www.dotnetperls.com:
7z a secure.7z * -pSECRET
Where:
7z : name and path of 7-Zip executable
a : add to archive
secure.7z : name of destination archive
* : add all files from current directory to destination archive
-pSECRET : specify the password "SECRET"
To open :
7z x secure.7z
Then provide the SECRET password
Note: If the password contains spaces or special characters, then enclose it with single quotes
7z a secure.7z * -p"pa$$word @|"
Different W3C specifications define different sets of "Node" types.
Thus, the DOM spec defines the following types of nodes:
Document
-- Element
(maximum of
one), ProcessingInstruction
,
Comment
, DocumentType
DocumentFragment
-- Element
, ProcessingInstruction
,
Comment
, Text
, CDATASection
, EntityReference
DocumentType
--
no children
EntityReference
-- Element
, ProcessingInstruction
,
Comment
, Text
, CDATASection
, EntityReference
Element
-- Element
, Text
, Comment
, ProcessingInstruction
,
CDATASection
, EntityReference
Attr
-- Text
, EntityReference
ProcessingInstruction
-- no children
Comment
-- no
children
Text
-- no
children
CDATASection
--
no children
Entity
-- Element
, ProcessingInstruction
,
Comment
, Text
, CDATASection
, EntityReference
Notation
-- no
children The XML Infoset (used by XPath) has a smaller set of nodes:
XPath has the following Node types:
The answer to your question "What is the difference between an element and a node" is:
An element is a type of node. Many other types of nodes exist and serve different purposes.
You can do this:
add-pssnapin Microsoft.Exchange.Management.PowerShell.E2010
and most of it will work (although MS support will tell you that doing this is not supported because it bypasses RBAC).
I've seen issues with some cmdlets (specifically enable/disable UMmailbox) not working with just the snapin loaded.
In Exchange 2010, they basically don't support using Powershell outside of the the implicit remoting environment of an actual EMS shell.
Yes:
git rev-parse --show-toplevel
If you want to replicate the Git command more directly, you can create an alias:
git config --global alias.root 'rev-parse --show-toplevel'
and now git root
will function just as hg root
.
Note: In a submodule this will display the root directory of the submodule and not the parent repository. If you are using Git >=2.13 or above, there is a way that submodules can show the superproject's root directory. If your git is older than that, see this other answer.
PackageManager m = getPackageManager();
String s = getPackageName();
PackageInfo p = m.getPackageInfo(s, 0);
s = p.applicationInfo.dataDir;
If eclipse worries about an uncaught NameNotFoundException
, you can use:
PackageManager m = getPackageManager();
String s = getPackageName();
try {
PackageInfo p = m.getPackageInfo(s, 0);
s = p.applicationInfo.dataDir;
} catch (PackageManager.NameNotFoundException e) {
Log.w("yourtag", "Error Package name not found ", e);
}
Add this to the module build.gradle:
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:design:28.0.0'
Some syntax particularity about this may have important behaviours. There is some little samples about redirections, STDERR
, STDOUT
, and arguments ordering.
Symbol >
means redirection.
>
means send to as a whole completed file, overwriting target if exist (see noclobber
bash feature at #3 later).>>
means send in addition to would append to target if exist.In any case, the file would be created if they not exist.
For testing this, we need a simple command which will send something on both outputs:
$ ls -ld /tmp /tnt
ls: cannot access /tnt: No such file or directory
drwxrwxrwt 118 root root 196608 Jan 7 11:49 /tmp
$ ls -ld /tmp /tnt >/dev/null
ls: cannot access /tnt: No such file or directory
$ ls -ld /tmp /tnt 2>/dev/null
drwxrwxrwt 118 root root 196608 Jan 7 11:49 /tmp
(Expecting you don't have a directory named /tnt
, of course ;). Well, we have it!!
So, let's see:
$ ls -ld /tmp /tnt >/dev/null
ls: cannot access /tnt: No such file or directory
$ ls -ld /tmp /tnt >/dev/null 2>&1
$ ls -ld /tmp /tnt 2>&1 >/dev/null
ls: cannot access /tnt: No such file or directory
The last command line dumps STDERR
to the console, and it seem not to be the expected behaviour... But...
If you want to make some post filtering about standard output, error output or both:
$ ls -ld /tmp /tnt | sed 's/^.*$/<-- & --->/'
ls: cannot access /tnt: No such file or directory
<-- drwxrwxrwt 118 root root 196608 Jan 7 12:02 /tmp --->
$ ls -ld /tmp /tnt 2>&1 | sed 's/^.*$/<-- & --->/'
<-- ls: cannot access /tnt: No such file or directory --->
<-- drwxrwxrwt 118 root root 196608 Jan 7 12:02 /tmp --->
$ ls -ld /tmp /tnt >/dev/null | sed 's/^.*$/<-- & --->/'
ls: cannot access /tnt: No such file or directory
$ ls -ld /tmp /tnt >/dev/null 2>&1 | sed 's/^.*$/<-- & --->/'
$ ls -ld /tmp /tnt 2>&1 >/dev/null | sed 's/^.*$/<-- & --->/'
<-- ls: cannot access /tnt: No such file or directory --->
Notice that the last command line in this paragraph is exactly same as in previous paragraph, where I wrote seem not to be the expected behaviour (so, this could even be an expected behaviour).
Well, there is a little tricks about redirections, for doing different operation on both outputs:
$ ( ls -ld /tmp /tnt | sed 's/^/O: /' >&9 ) 9>&2 2>&1 | sed 's/^/E: /'
O: drwxrwxrwt 118 root root 196608 Jan 7 12:13 /tmp
E: ls: cannot access /tnt: No such file or directory
Note: &9
descriptor would occur spontaneously because of ) 9>&2
.
Addendum: nota! With the new version of bash (>4.0
) there is a new feature and more sexy syntax for doing this kind of things:
$ ls -ld /tmp /tnt 2> >(sed 's/^/E: /') > >(sed 's/^/O: /')
O: drwxrwxrwt 17 root root 28672 Nov 5 23:00 /tmp
E: ls: cannot access /tnt: No such file or directory
And finally for such a cascading output formatting:
$ ((ls -ld /tmp /tnt |sed 's/^/O: /' >&9 ) 2>&1 |sed 's/^/E: /') 9>&1| cat -n
1 O: drwxrwxrwt 118 root root 196608 Jan 7 12:29 /tmp
2 E: ls: cannot access /tnt: No such file or directory
Addendum: nota! Same new syntax, in both ways:
$ cat -n <(ls -ld /tmp /tnt 2> >(sed 's/^/E: /') > >(sed 's/^/O: /'))
1 O: drwxrwxrwt 17 root root 28672 Nov 5 23:00 /tmp
2 E: ls: cannot access /tnt: No such file or directory
Where STDOUT
go through a specific filter, STDERR
to another and finally both outputs merged go through a third command filter.
noclobber
option and >|
syntaxThat's about overwriting:
While set -o noclobber
instruct bash to not overwrite any existing file, the >|
syntax let you pass through this limitation:
$ testfile=$(mktemp /tmp/testNoClobberDate-XXXXXX)
$ date > $testfile ; cat $testfile
Mon Jan 7 13:18:15 CET 2013
$ date > $testfile ; cat $testfile
Mon Jan 7 13:18:19 CET 2013
$ date > $testfile ; cat $testfile
Mon Jan 7 13:18:21 CET 2013
The file is overwritten each time, well now:
$ set -o noclobber
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDate-WW1xi9: cannot overwrite existing file
Mon Jan 7 13:18:21 CET 2013
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDate-WW1xi9: cannot overwrite existing file
Mon Jan 7 13:18:21 CET 2013
Pass through with >|
:
$ date >| $testfile ; cat $testfile
Mon Jan 7 13:18:58 CET 2013
$ date >| $testfile ; cat $testfile
Mon Jan 7 13:19:01 CET 2013
Unsetting this option and/or inquiring if already set.
$ set -o | grep noclobber
noclobber on
$ set +o noclobber
$ set -o | grep noclobber
noclobber off
$ date > $testfile ; cat $testfile
Mon Jan 7 13:24:27 CET 2013
$ rm $testfile
For redirecting both output from a given command, we see that a right syntax could be:
$ ls -ld /tmp /tnt >/dev/null 2>&1
for this special case, there is a shortcut syntax: &>
... or >&
$ ls -ld /tmp /tnt &>/dev/null
$ ls -ld /tmp /tnt >&/dev/null
Nota: if 2>&1
exist, 1>&2
is a correct syntax too:
$ ls -ld /tmp /tnt 2>/dev/null 1>&2
$ ls -ld /tmp /tnt 2>&1 1>&2 | sed -e s/^/++/
++/bin/ls: cannot access /tnt: No such file or directory
++drwxrwxrwt 193 root root 196608 Feb 9 11:08 /tmp/
$ ls -ld /tmp /tnt 1>&2 2>&1 | sed -e s/^/++/
/bin/ls: cannot access /tnt: No such file or directory
drwxrwxrwt 193 root root 196608 Feb 9 11:08 /tmp/
You could read the fine manual by hitting:
man -Len -Pless\ +/^REDIRECTION bash
in a bash console ;-)
This is not a solution to the complete problem but oracle has good detailed documentation on how to use this keytool. This explains how to
https://docs.oracle.com/cd/E54932_01/doc.705/e54936/cssg_create_ssl_cert.htm#CSVSG178
Use the following code when clicked on the button :
String value = edittext.getText().toString().trim(); //get text from editText
textView.setText(value); //setText in a textview
Hope to be useful to you.
If you want the indentation, you have to specify it to the TransformerFactory
.
TransformerFactory tf = TransformerFactory.newInstance();
tf.setAttribute("indent-number", new Integer(2));
Transformer t = tf.newTransformer();
An HTTP GET request can't contain data to be posted to the server. However, you can add a query string to the request.
angular.http provides an option for it called params
.
$http({
url: user.details_path,
method: "GET",
params: {user_id: user.id}
});
See: http://docs.angularjs.org/api/ng.$http#get and https://docs.angularjs.org/api/ng/service/$http#usage (shows the params
param)
Check again. Use debugger if must. My guess is that for some item in userResponseDetails this query finds no elements:
.Where(y => y.ResponseId.Equals(item.ResponseId))
so you can't call
.First()
on it. Maybe try
.FirstOrDefault()
if it solves the issue.
Do NOT return NULL value! This is purely so that you can see and diagnose where problem is. Handle these cases properly.
For the hell of it...
This solution is different to all earlier solutions, viz:
But first - note the question does not specify where such strings are stored. In my solution below, I create a CTE as a quick and dirty way to put these strings into some kind of "source table".
Note also - this solution uses a recursive common table expression (CTE) - so don't get confused by the usage of two CTEs here. The first is simply to make the data avaliable to the solution - but it is only the second CTE that is required in order to solve this problem. You can adapt the code to make this second CTE query your existing table, view, etc.
Lastly - my coding is verbose, trying to use column and CTE names that explain what is going on and you might be able to simplify this solution a little. I've added in a few pseudo phone numbers with some (expected and atypical, as the case may be) formatting for the fun of it.
with SOURCE_TABLE as (
select '003Preliminary Examination Plan' as numberString
union all select 'Coordination005' as numberString
union all select 'Balance1000sheet' as numberString
union all select '1300 456 678' as numberString
union all select '(012) 995 8322 ' as numberString
union all select '073263 6122,' as numberString
),
FIRST_CHAR_PROCESSED as (
select
len(numberString) as currentStringLength,
isNull(cast(try_cast(replace(left(numberString, 1),' ','z') as tinyint) as nvarchar),'') as firstCharAsNumeric,
cast(isNull(cast(try_cast(nullIf(left(numberString, 1),'') as tinyint) as nvarchar),'') as nvarchar(4000)) as newString,
cast(substring(numberString,2,len(numberString)) as nvarchar) as remainingString
from SOURCE_TABLE
union all
select
len(remainingString) as currentStringLength,
cast(try_cast(replace(left(remainingString, 1),' ','z') as tinyint) as nvarchar) as firstCharAsNumeric,
cast(isNull(newString,'') as nvarchar(3999)) + isNull(cast(try_cast(nullIf(left(remainingString, 1),'') as tinyint) as nvarchar(1)),'') as newString,
substring(remainingString,2,len(remainingString)) as remainingString
from FIRST_CHAR_PROCESSED fcp2
where fcp2.currentStringLength > 1
)
select
newString
,* -- comment this out when required
from FIRST_CHAR_PROCESSED
where currentStringLength = 1
So what's going on here?
Basically in our CTE we are selecting the first character and using try_cast
(see docs) to cast it to a tinyint
(which is a large enough data type for a single-digit numeral). Note that the type-casting rules in SQL Server say that an empty string (or a space, for that matter) will resolve to zero, so the nullif
is added to force spaces and empty strings to resolve to null (see discussion) (otherwise our result would include a zero character any time a space is encountered in the source data).
The CTE also returns everything after the first character - and that becomes the input to our recursive call on the CTE; in other words: now let's process the next character.
Lastly, the field newString
in the CTE is generated (in the second SELECT
) via concatenation. With recursive CTEs the data type must match between the two SELECT
statements for any given column - including the column size. Because we know we are adding (at most) a single character, we are casting that character to nvarchar(1) and we are casting the newString
(so far) as nvarchar(3999). Concatenated, the result will be nvarchar(4000) - which matches the type casting we carry out in the first SELECT
.
If you run this query and exclude the WHERE
clause, you'll get a sense of what's going on - but the rows may be in a strange order. (You won't necessarily see all rows relating to a single input value grouped together - but you should still be able to follow).
Hope it's an interesting option that may help a few people wanting a strictly expression-based solution.
On my side, this error came from the data type "INT' in the Null values column. The error is resolved by just changing the data a type to varchar.
There is a built-in function in bytearray that does what you intend.
bytearray.fromhex("de ad be ef 00")
It returns a bytearray and it reads hex strings with or without space separator.
For Oracle versions which does not support the WM_CONCAT, the following can be used
select "User", RTRIM(
XMLAGG (XMLELEMENT(e, department||',') ORDER BY department).EXTRACT('//text()') , ','
) AS departments
from yourtable
group by "User"
This one is much more powerful and flexible - you can specify both delimiters and sort order within each group as in listagg.
If you are using Java 5/6, you can use Apache Commons IO for read file to string. The class org.apache.commons.io.FileUtils
contais several method for read files.
e.g. using the method FileUtils#readFileToString
:
File file = new File("abc.txt");
String content = FileUtils.readFileToString(file);
If you need to organize data in columns of 1 / 2 / 4 depending of the viewport size then push and pull may be no option at all. No matter how you order your items in the first place, one of the sizes may give you a wrong order.
A solution in this case is to use nested rows and cols without any push or pull classes.
In XS you want...
A
B
C
D
E
F
G
H
In SM you want...
A E
B F
C G
D H
In MD and above you want...
A C E G
B D F H
Use nested two-column child elements in a surrounding two-column parent element:
Here is a working snippet:
<script src="https://code.jquery.com/jquery-1.12.4.min.js" type="text/javascript" ></script>_x000D_
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"> _x000D_
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>_x000D_
_x000D_
<div class="row">_x000D_
<div class="col-sm-6">_x000D_
<div class="row">_x000D_
<div class="col-md-6"><p>A</p><p>B</p></div>_x000D_
<div class="col-md-6"><p>C</p><p>D</p></div>_x000D_
</div>_x000D_
</div>_x000D_
<div class="col-sm-6">_x000D_
<div class="row">_x000D_
<div class="col-md-6"><p>E</p><p>F</p></div>_x000D_
<div class="col-md-6"><p>G</p><p>H</p></div>_x000D_
</div>_x000D_
</div>_x000D_
</div>
_x000D_
Another beauty of this solution is, that the items appear in the code in their natural order (A, B, C, ... H) and don't have to be shuffled, which is nice for CMS generation.
Using UIPickerview is the right way to go to implement it according to Apple's Human Interface Guidelines
If you select drop down in mobile safari it will show UIPickerview to let the use choose drop down items.
Alternatively
you can use UIPopoverController till iOS 9 as its deprecated but its better to stick with UIModalPresentationPopover of view you want o show as well
you can use UIActionsheet to show the items but it's better to use UIAlertViewController and choose UIActionSheetstyle to show as the former is deprecated in latest versions
You're probably missing the WindowState="Maximized"
, try the following:
<Window x:Class="HTA.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
WindowStyle="None" ResizeMode="NoResize"
WindowStartupLocation="CenterScreen" WindowState="Maximized">
Inspired by @hgoebl's answer. His code is for UTF-16 and I needed something for US-ASCII. So here's a more complete answer covering US-ASCII, UTF-16, and UTF-32.
/**@returns {Array} bytes of US-ASCII*/
function stringToAsciiByteArray(str)
{
var bytes = [];
for (var i = 0; i < str.length; ++i)
{
var charCode = str.charCodeAt(i);
if (charCode > 0xFF) // char > 1 byte since charCodeAt returns the UTF-16 value
{
throw new Error('Character ' + String.fromCharCode(charCode) + ' can\'t be represented by a US-ASCII byte.');
}
bytes.push(charCode);
}
return bytes;
}
/**@returns {Array} bytes of UTF-16 Big Endian without BOM*/
function stringToUtf16ByteArray(str)
{
var bytes = [];
//currently the function returns without BOM. Uncomment the next line to change that.
//bytes.push(254, 255); //Big Endian Byte Order Marks
for (var i = 0; i < str.length; ++i)
{
var charCode = str.charCodeAt(i);
//char > 2 bytes is impossible since charCodeAt can only return 2 bytes
bytes.push((charCode & 0xFF00) >>> 8); //high byte (might be 0)
bytes.push(charCode & 0xFF); //low byte
}
return bytes;
}
/**@returns {Array} bytes of UTF-32 Big Endian without BOM*/
function stringToUtf32ByteArray(str)
{
var bytes = [];
//currently the function returns without BOM. Uncomment the next line to change that.
//bytes.push(0, 0, 254, 255); //Big Endian Byte Order Marks
for (var i = 0; i < str.length; i+=2)
{
var charPoint = str.codePointAt(i);
//char > 4 bytes is impossible since codePointAt can only return 4 bytes
bytes.push((charPoint & 0xFF000000) >>> 24);
bytes.push((charPoint & 0xFF0000) >>> 16);
bytes.push((charPoint & 0xFF00) >>> 8);
bytes.push(charPoint & 0xFF);
}
return bytes;
}
UTF-8 is variable length and isn't included because I would have to write the encoding myself. UTF-8 and UTF-16 are variable length. UTF-8, UTF-16, and UTF-32 have a minimum number of bits as their name indicates. If a UTF-32 character has a code point of 65 then that means there are 3 leading 0s. But the same code for UTF-16 has only 1 leading 0. US-ASCII on the other hand is fixed width 8-bits which means it can be directly translated to bytes.
String.prototype.charCodeAt
returns a maximum number of 2 bytes and matches UTF-16 exactly. However for UTF-32 String.prototype.codePointAt
is needed which is part of the ECMAScript 6 (Harmony) proposal. Because charCodeAt returns 2 bytes which is more possible characters than US-ASCII can represent, the function stringToAsciiByteArray
will throw in such cases instead of splitting the character in half and taking either or both bytes.
Note that this answer is non-trivial because character encoding is non-trivial. What kind of byte array you want depends on what character encoding you want those bytes to represent.
javascript has the option of internally using either UTF-16 or UCS-2 but since it has methods that act like it is UTF-16 I don't see why any browser would use UCS-2. Also see: https://mathiasbynens.be/notes/javascript-encoding
Yes I know the question is 4 years old but I needed this answer for myself.