static int b[][]={{21,21},{22,22}};
static int a[][] ={{1,1},{2,2}};
public static void mul(){
int c[][] = new int[2][2];
for(int i=0;i<b.length;i++){
for(int j=0;j<b.length;j++){
c[i][j] =0;
}
}
for(int i=0;i<a.length;i++){
for(int j=0;j<b.length;j++){
for(int k=0;k<b.length;k++){
c[i][j]= c[i][j] +(a[i][k] * b[k][j]);
}
}
}
for(int i=0;i<c.length;i++){
for(int j=0;j<c.length;j++){
System.out.print(c[i][j]);
}
System.out.println("\n");
}
}
A pertinent quote from PEP 465 - A dedicated infix operator for matrix multiplication , as mentioned by @petr-viktorin, clarifies the problem the OP was getting at:
[...] numpy provides two different types with different
__mul__
methods. Fornumpy.ndarray
objects,*
performs elementwise multiplication, and matrix multiplication must use a function call (numpy.dot
). Fornumpy.matrix
objects,*
performs matrix multiplication, and elementwise multiplication requires function syntax. Writing code usingnumpy.ndarray
works fine. Writing code usingnumpy.matrix
also works fine. But trouble begins as soon as we try to integrate these two pieces of code together. Code that expects anndarray
and gets amatrix
, or vice-versa, may crash or return incorrect results
The introduction of the @
infix operator should help to unify and simplify python matrix code.
For elementwise multiplication of matrix
objects, you can use numpy.multiply
:
import numpy as np
a = np.array([[1,2],[3,4]])
b = np.array([[5,6],[7,8]])
np.multiply(a,b)
Result
array([[ 5, 12],
[21, 32]])
However, you should really use array
instead of matrix
. matrix
objects have all sorts of horrible incompatibilities with regular ndarrays. With ndarrays, you can just use *
for elementwise multiplication:
a * b
If you're on Python 3.5+, you don't even lose the ability to perform matrix multiplication with an operator, because @
does matrix multiplication now:
a @ b # matrix multiplication
The naive algorithm, which is what you've got once you correct it as noted in comments, is O(n^3).
There do exist algorithms that reduce this somewhat, but you're not likely to find an O(n^2) implementation. I believe the question of the most efficient implementation is still open.
See this wikipedia article on Matrix Multiplication for more information.
In mathematics, I think the dot in numpy makes more sense
dot(a,b)_{i,j,k,a,b,c} =
since it gives the dot product when a and b are vectors, or the matrix multiplication when a and b are matrices
As for matmul operation in numpy, it consists of parts of dot result, and it can be defined as
So, you can see that matmul(a,b) returns an array with a small shape, which has smaller memory consumption and make more sense in applications. In particular, combining with broadcasting, you can get
matmul(a,b)_{i,j,k,l} =
for example.
From the above two definitions, you can see the requirements to use those two operations. Assume a.shape=(s1,s2,s3,s4) and b.shape=(t1,t2,t3,t4)
To use dot(a,b) you need
To use matmul(a,b) you need
Use the following piece of code to convince yourself.
import numpy as np
for it in xrange(10000):
a = np.random.rand(5,6,2,4)
b = np.random.rand(6,4,3)
c = np.matmul(a,b)
d = np.dot(a,b)
#print 'c shape: ', c.shape,'d shape:', d.shape
for i in range(5):
for j in range(6):
for k in range(2):
for l in range(3):
if not c[i,j,k,l] == d[i,j,k,j,l]:
print it,i,j,k,l,c[i,j,k,l]==d[i,j,k,j,l] #you will not see them
Matrix Multiplication in pure python.
def matmult(m1,m2):
r=[]
m=[]
for i in range(len(m1)):
for j in range(len(m2[0])):
sums=0
for k in range(len(m2)):
sums=sums+(m1[i][k]*m2[k][j])
r.append(sums)
m.append(r)
r=[]
return m
docker logs -f docker_container_name >> YOUR_LOG_PATH 2>&1 &
in the html :
<div ng-repeat="t in getTimes(4)">text</div>
and in the controller :
$scope.getTimes=function(n){
return new Array(n);
};
http://plnkr.co/edit/j5kNLY4Xr43CzcjM1gkj
EDIT :
with angularjs > 1.2.x
<div ng-repeat="t in getTimes(4) track by $index">TEXT</div>
You need to somehow create a table with these values and then use NOT IN
. This can be done with a temporary table, a CTE (Common Table Expression) or a Table Values Constructor (available in SQL-Server 2008):
SELECT email
FROM
( VALUES
('email1')
, ('email2')
, ('email3')
) AS Checking (email)
WHERE email NOT IN
( SELECT email
FROM Users
)
The second result can be found with a LEFT JOIN
or an EXISTS
subquery:
SELECT email
, CASE WHEN EXISTS ( SELECT *
FROM Users u
WHERE u.email = Checking.email
)
THEN 'Exists'
ELSE 'Not exists'
END AS status
FROM
( VALUES
('email1')
, ('email2')
, ('email3')
) AS Checking (email)
If you got only one column in the range to clean, just add "(1)" to the end. It indicates in wich column of the range Excel will remove the duplicates. Something like:
Sub norepeat()
Range("C8:C16").RemoveDuplicates (1)
End Sub
Regards
You should take a look at the new Spatial data-types that were introduced in SQL Server 2008. They are specifically designed this kind of task and make indexing and querying the data much easier and more efficient.
http://msdn.microsoft.com/en-us/library/bb933876(v=sql.105).aspx
Leave Hungarian to the Hungarians.
In the example I'd even leave out the definitive article and just go with
private const int Answer = 42;
Is that answer or is that the answer?
*Made edit as Pascal strictly correct, however I was thinking the question was seeking more of an answer to life, the universe and everything.
CommonJS and AMD are specifications (or formats) on how modules and their dependencies should be declared in javascript applications.
RequireJS is a script loader library that is AMD compliant, curljs being another example.
Taken from Addy Osmani's book.
// package/lib is a dependency we require
var lib = require( "package/lib" );
// behavior for our module
function foo(){
lib.log( "hello world!" );
}
// export (expose) foo to other modules as foobar
exports.foobar = foo;
// package/lib is a dependency we require
define(["package/lib"], function (lib) {
// behavior for our module
function foo() {
lib.log( "hello world!" );
}
// export (expose) foo to other modules as foobar
return {
foobar: foo
}
});
Somewhere else the module can be used with:
require(["package/myModule"], function(myModule) {
myModule.foobar();
});
Actually, CommonJS is much more than an API declaration and only a part of it deals with that. AMD started as a draft specification for the module format on the CommonJS list, but full consensus wasn't reached and further development of the format moved to the amdjs group. Arguments around which format is better state that CommonJS attempts to cover a broader set of concerns and that it's better suited for server side development given its synchronous nature, and that AMD is better suited for client side (browser) development given its asynchronous nature and the fact that it has its roots in Dojo's module declaration implementation.
a = 0.000006;
b = 6;
c = a/b;
textbox.Text = c.ToString("0.000000");
As you requested:
textbox.Text = c.ToString("0.######");
This will only display out to the 6th decimal place if there are 6 decimals to display.
Execute: sudo gedit ~/.bashrc
add
JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export JAVA_HOME
PATH=$PATH:$JAVA_HOME
export PATH
export ANDROID_HOME=~/Android/Sdk
export PATH=${PATH}:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
and
source ~/.bashrc
Yes, you can call setId(value)
in any view with any (positive) integer value that you like and then find it in the parent container using findViewById(value)
. Note that it is valid to call setId()
with the same value for different sibling views, but findViewById()
will return only the first one.
This error message is very confusing. I just fixed the other 'warnings' in my project and I really had only one (simple one):
warning C4101: 'i': unreferenced local variable
After I commented this unused i
, and compiled it, the other error went away.
little few change in your code :
TextView tv = (TextView)findViewById(R.id.charCounts);
textMessage = (EditText)findViewById(R.id.textMessage);
textMessage.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
tv.setText(String.valueOf(s.toString().length()));
}
public void beforeTextChanged(CharSequence s, int start, int count, int after){}
public void onTextChanged(CharSequence s, int start, int before, int count){}
});
import numpy as np
def Haversine(lat1,lon1,lat2,lon2, **kwarg):
"""
This uses the ‘haversine’ formula to calculate the great-circle distance between two points – that is,
the shortest distance over the earth’s surface – giving an ‘as-the-crow-flies’ distance between the points
(ignoring any hills they fly over, of course!).
Haversine
formula: a = sin²(?f/2) + cos f1 · cos f2 · sin²(??/2)
c = 2 · atan2( va, v(1-a) )
d = R · c
where f is latitude, ? is longitude, R is earth’s radius (mean radius = 6,371km);
note that angles need to be in radians to pass to trig functions!
"""
R = 6371.0088
lat1,lon1,lat2,lon2 = map(np.radians, [lat1,lon1,lat2,lon2])
dlat = lat2 - lat1
dlon = lon2 - lon1
a = np.sin(dlat/2)**2 + np.cos(lat1) * np.cos(lat2) * np.sin(dlon/2) **2
c = 2 * np.arctan2(a**0.5, (1-a)**0.5)
d = R * c
return round(d,4)
Sometimes what you're seeing is a box shadow, not a text underline.
Try this (using whatever CSS selectors are appropriate for you):
a:hover, a:visited, a:link, a:active {
text-decoration: none!important;
-webkit-box-shadow: none!important;
box-shadow: none!important;
}
Depends on what your native code does, but v7a has support for hardware floating point operations, which makes a huge difference. armeabi will work fine on all devices, but will be a lot slower, and won't take advantage of newer devices' CPU capabilities. Do take some benchmarks for your particular application, but removing the armeabi-v7a binaries is generally not a good idea. If you need to reduce size, you might want to have two separate apks for older (armeabi) and newer (armeabi-v7a) devices.
Your code is working just fine, you have to declare javscript method before DOM ready.
Web Developers use javascript:void(0)
because it is the easiest way to prevent the default behavior of a
tag. void(*anything*)
returns undefined
and it is a falsy value. and returning a falsy value is like return false
in onclick
event of a
tag that prevents its default behavior.
So I think javascript:void(0)
is the simplest way to prevent the default behavior of a
tag.
As BobBeechey suggests in his response to this question, the following code will work for this:
private void txt_fname_TextChanged(object sender, EventArgs e)
{
char[] c = txt_fname.Text.ToCharArray();
int j;
for (j = 0; j < txt_fname.Text.Length; j++)
{
if (j==0) c[j]=c[j].ToString().ToUpper()[0];
else c[j] = c[j].ToString().ToLower()[0];
}
txt_fname.Text = new string(c);
txt_fname.Select(txt_fname.Text.Length, 1);
}
This will be the best way
List<String> list = new ArrayList<String>();
list.add("Krishna");
list.add("Krishna");
list.add("Kishan");
list.add("Krishn");
list.add("Aryan");
list.add("Harm");
Set<String> set=new HashSet<>(list);
Modernizr can detect CSS 3D transforms, yeah. The truthiness of Modernizr.csstransforms3d
will tell you if the browser supports them.
The above link lets you select which tests to include in a Modernizr build, and the option you're looking for is available there.
Alternatively, as user356990 answered, you can use conditional comments if you're searching for IE and IE alone. Rather than creating a global variable, you can use HTML5 Boilerplate's <html>
conditional comments trick to assign a class:
<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
If you already have jQuery initialised, you can just check with $('html').hasClass('lt-ie9')
. If you need to check which IE version you're in so you can conditionally load either jQuery 1.x or 2.x, you can do something like this:
myChecks.ltIE9 = (function(){
var htmlElemClasses = document.querySelector('html').className.split(' ');
if (!htmlElemClasses){return false;}
for (var i = 0; i < htmlElemClasses.length; i += 1 ){
var klass = htmlElemClasses[i];
if (klass === 'lt-ie9'){
return true;
}
}
return false;
}());
N.B. IE conditional comments are only supported up to IE9 inclusive. From IE10 onwards, Microsoft encourages using feature detection rather than browser detection.
Whichever method you choose, you'd then test with
if ( myChecks.ltIE9 || Modernizr.csstransforms3d ){
// iframe or flash fallback
}
Don't take that ||
literally, of course.
Functions that might be helpful:
open("file").read()
which reads the contents of the whole file at once'string'.splitlines()
which separates lines from each other (and discards empty lines)By using len() and those functions you could accomplish what you're doing.
C++ Standard has: It is possible to transfer into a block, but not in a way that bypasses declarations with initialization. A program that jumps from a point where a local variable with automatic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has POD type (3.9) and is declared without an initializer (8.5).
The code to illustrate this rule:
#include <iostream>
using namespace std;
class X {
public:
X()
{
cout << "constructor" << endl;
}
~X()
{
cout << "destructor" << endl;
}
};
template <class type>
void ill_formed()
{
goto lx;
ly:
type a;
lx:
goto ly;
}
template <class type>
void ok()
{
ly:
type a;
lx:
goto ly;
}
void test_class()
{
ok<X>();
// compile error
ill_formed<X>();
}
void test_scalar()
{
ok<int>();
ill_formed<int>();
}
int main(int argc, const char *argv[])
{
return 0;
}
The code to show the initializer effect:
#include <iostream>
using namespace std;
int test1()
{
int i = 0;
// There jumps fo "case 1" and "case 2"
switch(i) {
case 1:
// Compile error because of the initializer
int r = 1;
break;
case 2:
break;
};
}
void test2()
{
int i = 2;
switch(i) {
case 1:
int r;
r= 1;
break;
case 2:
cout << "r: " << r << endl;
break;
};
}
int main(int argc, const char *argv[])
{
test1();
test2();
return 0;
}
Try below code:
$(document).ready(function(){
$('#about').css({'background-color':'black'});
});
You can center any number of child in a FrameLayout
.
<FrameLayout
>
<child1
....
android:layout_gravity="center"
.....
/>
<Child2
....
android:layout_gravity="center"
/>
</FrameLayout>
So the key is
adding
android:layout_gravity="center"
in the child views.
I centered a CustomView and a TextView on a FrameLayout
like this
Code:
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<com.airbnb.lottie.LottieAnimationView
android:layout_width="180dp"
android:layout_height="180dp"
android:layout_gravity="center"
app:lottie_fileName="red_scan.json"
app:lottie_autoPlay="true"
app:lottie_loop="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textColor="#ffffff"
android:textSize="10dp"
android:textStyle="bold"
android:padding="10dp"
android:text="Networks Available: 1\n click to see all"
android:gravity="center" />
</FrameLayout>
Result:
I put above-mentioned methods together using ax
instead of plt
import numpy as np
import matplotlib.pyplot as plt
x = range(100)
y = x
fig, ax = plt.subplots(1, 1, figsize=(7.2, 7.2))
ax.plot(x, y);
# method 1
print(ax.get_xlim())
print(ax.get_xlim())
# method 2
print(ax.axis())
Close the terminal(End the current session). Open it again.
Here is a post by someone who figured out how to remap the paste event to automatically turn paste mode on and then back off. Works for me in tmux/iTerm on MacOSX.
You can upgrade your Java 7 version to 1.7.0_131-b31
For JRE 1.7.0_131-b31 in Oracle site :
TLSv1.2 and TLSv1.1 are now enabled by default on the TLS client end-points. This is similar behavior to what already happens in JDK 8 releases.
I found an easy way to fetch the details of Tables and columns of a particular DB using SQL developer.
Select *FROM USER_TAB_COLUMNS
The following is not a 100% guaranteed method, and should not at all be attempted for scripting. But some times it is good enough for quick interactive shell usage. A file file glob like
[abc]*
(which will match all files with names starting with a, b or c) can be negated by inserting a "^" character first, i.e.
[^abc]*
I sometimes use this for not matching the "lost+found" directory, like for instance:
mv /mnt/usbdisk/[^l]* /home/user/stuff/.
Of course if there are other files starting with l I have to process those afterwards.
For preview in Firefox works this - attachment is object of attachment element in first example:
if (attachment.files)
previewImage.src = attachment.files.item(0).getAsDataURL();
else
previewImage.src = attachment.value;
Just remove the 'F:\' from -javaagent
-vm E:\Program Files\Java\jdk1.7.0_60\bin
-vmargs
-Dosgi.requiredJavaVersion=1.7
-javaagent:\Tools\Java Lib\Lombok\lombok.jar
-Xbootclasspath/a:F:\Tools\Java Lib\Lombok\lombok.jar
-Xms40m
-Xmx512m
If your minimum SDK is 23 or upper you could use this:
View childView = findViewById(R.id.your_view_id_in_the_scroll_view)
if(childView != null){
scrollview.post(() -> scrollview.scrollToDescendant(childView));
}
The linked list holds operations on the shared data structure.
For example, if I have a stack, it will be manipulated with pushes and pops. The linked list would be a set of pushes and pops on the pseudo-shared stack. Each thread sharing that stack will actually have a local copy, and to get to the current shared state, it'll walk the linked list of operations, and apply each operation in order to its local copy of the stack. When it reaches the end of the linked list, its local copy holds the current state (though, of course, it's subject to becoming stale at any time).
In the traditional model, you'd have some sort of locks around each push and pop. Each thread would wait to obtain a lock, then do a push or pop, then release the lock.
In this model, each thread has a local snapshot of the stack, which it keeps synchronized with other threads' view of the stack by applying the operations in the linked list. When it wants to manipulate the stack, it doesn't try to manipulate it directly at all. Instead, it simply adds its push or pop operation to the linked list, so all the other threads can/will see that operation and they can all stay in sync. Then, of course, it applies the operations in the linked list, and when (for example) there's a pop it checks which thread asked for the pop. It uses the popped item if and only if it's the thread that requested this particular pop.
Step 1 curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py Step2 python get-pip.py
A bit late for probable answer, might help new people. In case you have multiple instances of database:
mongoimport --host <host_name>:<host_port> --db <database_name> --collection <collection_name> --file <path_to_dump_file> -u <my_user> -p <my_pass>
Assuming credentials needed, otherwise remove this option.
You can do it by making form and displaying it using ShowDialogBox....
Form.ShowDialog Method
- Shows the form as a modal dialog box.
Example:
public void ShowMyDialogBox()
{
Form2 testDialog = new Form2();
// Show testDialog as a modal dialog and determine if DialogResult = OK.
if (testDialog.ShowDialog(this) == DialogResult.OK)
{
// Read the contents of testDialog's TextBox.
this.txtResult.Text = testDialog.TextBox1.Text;
}
else
{
this.txtResult.Text = "Cancelled";
}
testDialog.Dispose();
}
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
1. Can not instantiate abstract class: Classes defined as abstract may not be instantiated, and any class that contains at least one abstract method must also be abstract.
Example below :
abstract class AbstractClass
{
abstract protected function getValue();
abstract protected function prefixValue($prefix);
public function printOut() {
echo "Hello how are you?";
}
}
$obj=new AbstractClass();
$obj->printOut();
//Fatal error: Cannot instantiate abstract class AbstractClass
2. Any class that contains at least one abstract method must also be abstract: Abstract class can have abstract and non-abstract methods, but it must contain at least one abstract method. If a class has at least one abstract method, then the class must be declared abstract.
Note: Traits support the use of abstract methods in order to impose requirements upon the exhibiting class.
Example below :
class Non_Abstract_Class
{
abstract protected function getValue();
public function printOut() {
echo "Hello how are you?";
}
}
$obj=new Non_Abstract_Class();
$obj->printOut();
//Fatal error: Class Non_Abstract_Class contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Non_Abstract_Class::getValue)
3. An abstract method can not contain body: Methods defined as abstract simply declare the method's signature - they cannot define the implementation. But a non-abstract method can define the implementation.
abstract class AbstractClass
{
abstract protected function getValue(){
return "Hello how are you?";
}
public function printOut() {
echo $this->getValue() . "\n";
}
}
class ConcreteClass1 extends AbstractClass
{
protected function getValue() {
return "ConcreteClass1";
}
public function prefixValue($prefix) {
return "{$prefix}ConcreteClass1";
}
}
$class1 = new ConcreteClass1;
$class1->printOut();
echo $class1->prefixValue('FOO_') ."\n";
//Fatal error: Abstract function AbstractClass::getValue() cannot contain body
4. When inheriting from an abstract class, all methods marked abstract in the parent's class declaration must be defined by the child :If you inherit an abstract class you have to provide implementations to all the abstract methods in it.
abstract class AbstractClass
{
// Force Extending class to define this method
abstract protected function getValue();
// Common method
public function printOut() {
print $this->getValue() . "<br/>";
}
}
class ConcreteClass1 extends AbstractClass
{
public function printOut() {
echo "dhairya";
}
}
$class1 = new ConcreteClass1;
$class1->printOut();
//Fatal error: Class ConcreteClass1 contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (AbstractClass::getValue)
5. Same (or a less restricted) visibility:When inheriting from an abstract class, all methods marked abstract in the parent's class declaration must be defined by the child; additionally, these methods must be defined with the same (or a less restricted) visibility. For example, if the abstract method is defined as protected, the function implementation must be defined as either protected or public, but not private.
Note that abstract method should not be private.
abstract class AbstractClass
{
abstract public function getValue();
abstract protected function prefixValue($prefix);
public function printOut() {
print $this->getValue();
}
}
class ConcreteClass1 extends AbstractClass
{
protected function getValue() {
return "ConcreteClass1";
}
public function prefixValue($prefix) {
return "{$prefix}ConcreteClass1";
}
}
$class1 = new ConcreteClass1;
$class1->printOut();
echo $class1->prefixValue('FOO_') ."<br/>";
//Fatal error: Access level to ConcreteClass1::getValue() must be public (as in class AbstractClass)
6. Signatures of the abstract methods must match:When inheriting from an abstract class, all methods marked abstract in the parent's class declaration must be defined by the child;the signatures of the methods must match, i.e. the type hints and the number of required arguments must be the same. For example, if the child class defines an optional argument, where the abstract method's signature does not, there is no conflict in the signature.
abstract class AbstractClass
{
abstract protected function prefixName($name);
}
class ConcreteClass extends AbstractClass
{
public function prefixName($name, $separator = ".") {
if ($name == "Pacman") {
$prefix = "Mr";
} elseif ($name == "Pacwoman") {
$prefix = "Mrs";
} else {
$prefix = "";
}
return "{$prefix}{$separator} {$name}";
}
}
$class = new ConcreteClass;
echo $class->prefixName("Pacman"), "<br/>";
echo $class->prefixName("Pacwoman"), "<br/>";
//output: Mr. Pacman
// Mrs. Pacwoman
7. Abstract class doesn't support multiple inheritance:Abstract class can extends another abstract class,Abstract class can provide the implementation of interface.But it doesn't support multiple inheritance.
interface MyInterface{
public function foo();
public function bar();
}
abstract class MyAbstract1{
abstract public function baz();
}
abstract class MyAbstract2 extends MyAbstract1 implements MyInterface{
public function foo(){ echo "foo"; }
public function bar(){ echo "bar"; }
public function baz(){ echo "baz"; }
}
class MyClass extends MyAbstract2{
}
$obj=new MyClass;
$obj->foo();
$obj->bar();
$obj->baz();
//output: foobarbaz
Note: Please note order or positioning of the classes in your code can affect the interpreter and can cause a Fatal error. So, when using multiple levels of abstraction, be careful of the positioning of the classes within the source code.
below example will cause Fatal error: Class 'horse' not found
class cart extends horse {
public function get_breed() { return "Wood"; }
}
abstract class horse extends animal {
public function get_breed() { return "Jersey"; }
}
abstract class animal {
public abstract function get_breed();
}
$cart = new cart();
print($cart->get_breed());
While there isn't a standard way of doing this in ES6, there is a library called Bluebird to handle this.
There is also a recommended way described as part of the react documentation. It looks similar to what you have in your 2 and 3rd updates.
const makeCancelable = (promise) => {
let hasCanceled_ = false;
const wrappedPromise = new Promise((resolve, reject) => {
promise.then((val) =>
hasCanceled_ ? reject({isCanceled: true}) : resolve(val)
);
promise.catch((error) =>
hasCanceled_ ? reject({isCanceled: true}) : reject(error)
);
});
return {
promise: wrappedPromise,
cancel() {
hasCanceled_ = true;
},
};
};
const cancelablePromise = makeCancelable(
new Promise(r => component.setState({...}}))
);
cancelablePromise
.promise
.then(() => console.log('resolved'))
.catch((reason) => console.log('isCanceled', reason.isCanceled));
cancelablePromise.cancel(); // Cancel the promise
Taken from: https://facebook.github.io/react/blog/2015/12/16/ismounted-antipattern.html
It is possible to center a video inside an element just like a cover
sized background-image
without JS using the object-fit
attribute or CSS Transforms
.
As pointed in the comments, it is possible to achieve the same result without CSS transform
, but using object-fit
, which I think it's an even better option for the same result:
.video-container {
height: 300px;
width: 300px;
position: relative;
}
.video-container video {
width: 100%;
height: 100%;
position: absolute;
object-fit: cover;
z-index: 0;
}
/* Just styling the content of the div, the *magic* in the previous rules */
.video-container .caption {
z-index: 1;
position: relative;
text-align: center;
color: #dc0000;
padding: 10px;
}
_x000D_
<div class="video-container">
<video autoplay muted loop>
<source src="https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" type="video/mp4" />
</video>
<div class="caption">
<h2>Your caption here</h2>
</div>
</div>
_x000D_
You can set a video as a background to any HTML element easily thanks to transform
CSS property.
Note that you can use the transform
technique to center vertically and horizontally any HTML element.
.video-container {
height: 300px;
width: 300px;
overflow: hidden;
position: relative;
}
.video-container video {
min-width: 100%;
min-height: 100%;
position: absolute;
top: 50%;
left: 50%;
transform: translateX(-50%) translateY(-50%);
}
/* Just styling the content of the div, the *magic* in the previous rules */
.video-container .caption {
z-index: 1;
position: relative;
text-align: center;
color: #dc0000;
padding: 10px;
}
_x000D_
<div class="video-container">
<video autoplay muted loop>
<source src="https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" type="video/mp4" />
</video>
<div class="caption">
<h2>Your caption here</h2>
</div>
</div>
_x000D_
As Andrew Brower says, but adding a trim
ALTER PROCEDURE <Name>
(
@PartialName VARCHAR(50) = NULL
)
SELECT Name
FROM <table>
WHERE Name LIKE '%' + LTRIM(RTRIM(@PartialName)) + '%'
You can simply use the following command:-
tail -NUMBER_OF_LINES FILE_NAME
e.g tail -100 test.log
In case, if you want the output of the above in a separate file then you can pipes as follows:-
tail -NUMBER_OF_LINES FILE_NAME > OUTPUT_FILE_NAME
e.g tail -100 test.log > output.log
1 for month is February. The 30th of February is changed to 1st of March. You should set 0 for month. The best is to use the constant defined in Calendar:
c1.set(2000, Calendar.JANUARY, 30);
Try creating a class to serve as the data model, then send a JSON object with properties matching the properties of your data model class. (Note: I have tested this and it works with the newest MVC 4 RC 2012 that I just downloaded today).
public HttpResponseMessage Post(ValueModel model)
{
return Request.CreateResponse<string>(HttpStatusCode.OK, "Value Recieved: " + model.Value);
}
public class ValueModel
{
public string Value { get; set; }
}
The below JSON object is sent in HTTP-POST body, content-type is application/json
{ "value": "In MVC4 Beta you could map to simple types like string, but testing with RC 2012 I have only been able to map to DataModels and only JSON (application/json) and url-encoded (application/x-www-form-urlencoded body formats have worked. XML is not working for some reason" }
I believe the reason why you have to create a data model class is because simple values are assumed to be from the url parameters, and a single complex value is assumed to be from the body. They do have the [FromBody]
and [FromUrl]
attributes, but using [FromBody] string value
still did not work for me. Seems like they are still working out a lot of bugs so I'm sure this will change in the future.
Edit: Got XML to work in the body. The default XML serializer was changed to DataContractSerializer instead of XmlSerializer. Putting the following line in my Global.asax file fixed this issue (reference)
GlobalConfiguration.Configuration.Formatters.XmlFormatter.UseXmlSerializer = true;
According to the docs you can set the parse_mode
field to:
Markdown still works but it's now considered a legacy mode.
You can pass the parse_mode
parameter like this:
https://api.telegram.org/bot[yourBotKey]/sendMessage?chat_id=[yourChatId]&parse_mode=MarkdownV2&text=[yourMessage]
For bold and italic using MarkdownV2:
*bold text*
_italic text_
And for HTML:
<b>bold</b> or <strong>bold</strong>
<i>italic</I> or <em>italic</em>
Make sure to encode your query-string parameters regardless the format you pick. For example:
val message = "*bold text*";
val encodedMsg = URLEncoder.encode(message, "UTF-8");
var message = "*bold text*"
var encodedMsg = encodeURIComponent(message)
$message = "*bold text*";
$encodedMsg = urlencode($message);
You cannot reload the fragment while it is attached to an Activity, where you get "Fragment Already Added
" exception.
So the fragment has to be first detached from its activity and then attached. All can be done using the fluent api in one line:
getFragmentManager().beginTransaction().detach(this).attach(this).commit();
Update: This is to incorporate the changes made to API 26 and above:
FragmentTransaction transaction = mActivity.getFragmentManager()
.beginTransaction();
if (Build.VERSION.SDK_INT >= 26) {
transaction.setReorderingAllowed(false);
}
transaction.detach(this).attach
(this).commit();
For more description of the update please see https://stackoverflow.com/a/51327440/4514796
I found this helpful...
http://www.cmake.org/pipermail/cmake/2011-June/045222.html
From their example:
ADD_LIBRARY(boost_unit_test_framework STATIC IMPORTED)
SET_TARGET_PROPERTIES(boost_unit_test_framework PROPERTIES IMPORTED_LOCATION /usr/lib/libboost_unit_test_framework.a)
TARGET_LINK_LIBRARIES(mytarget A boost_unit_test_framework C)
<table id="myData">
</table>
<script type="text/javascript">
$('#search').click(function() {
alert("submit handler has fired");
$.ajax({
type: 'POST',
url: 'cityResults.htm',
data: $('#cityDetails').serialize(),
success: function(data){
$.each(data, function( index, value ) {
var row = $("<tr><td>" + value.city + "</td><td>" + value.cStatus + "</td></tr>");
$("#myData").append(row);
});
},
error: function(jqXHR, textStatus, errorThrown){
alert('error: ' + textStatus + ': ' + errorThrown);
}
});
return false;//suppress natural form submission
});
</script>
loop through the data and append it to a table like the code above.
The answer depends on your view point:
If you judge by the C++ standard, you cannot get a null reference because you get undefined behavior first. After that first incidence of undefined behavior, the standard allows anything to happen. So, if you write *(int*)0
, you already have undefined behavior as you are, from a language standard point of view, dereferencing a null pointer. The rest of the program is irrelevant, once this expression is executed, you are out of the game.
However, in practice, null references can easily be created from null pointers, and you won't notice until you actually try to access the value behind the null reference. Your example may be a bit too simple, as any good optimizing compiler will see the undefined behavior, and simply optimize away anything that depends on it (the null reference won't even be created, it will be optimized away).
Yet, that optimizing away depends on the compiler to prove the undefined behavior, which may not be possible to do. Consider this simple function inside a file converter.cpp
:
int& toReference(int* pointer) {
return *pointer;
}
When the compiler sees this function, it does not know whether the pointer is a null pointer or not. So it just generates code that turns any pointer into the corresponding reference. (Btw: This is a noop since pointers and references are the exact same beast in assembler.) Now, if you have another file user.cpp
with the code
#include "converter.h"
void foo() {
int& nullRef = toReference(nullptr);
cout << nullRef; //crash happens here
}
the compiler does not know that toReference()
will dereference the passed pointer, and assume that it returns a valid reference, which will happen to be a null reference in practice. The call succeeds, but when you try to use the reference, the program crashes. Hopefully. The standard allows for anything to happen, including the appearance of pink elephants.
You may ask why this is relevant, after all, the undefined behavior was already triggered inside toReference()
. The answer is debugging: Null references may propagate and proliferate just as null pointers do. If you are not aware that null references can exist, and learn to avoid creating them, you may spend quite some time trying to figure out why your member function seems to crash when it's just trying to read a plain old int
member (answer: the instance in the call of the member was a null reference, so this
is a null pointer, and your member is computed to be located as address 8).
So how about checking for null references? You gave the line
if( & nullReference == 0 ) // null reference
in your question. Well, that won't work: According to the standard, you have undefined behavior if you dereference a null pointer, and you cannot create a null reference without dereferencing a null pointer, so null references exist only inside the realm of undefined behavior. Since your compiler may assume that you are not triggering undefined behavior, it can assume that there is no such thing as a null reference (even though it will readily emit code that generates null references!). As such, it sees the if()
condition, concludes that it cannot be true, and just throw away the entire if()
statement. With the introduction of link time optimizations, it has become plain impossible to check for null references in a robust way.
Null references are somewhat of a ghastly existence:
Their existence seems impossible (= by the standard),
but they exist (= by the generated machine code),
but you cannot see them if they exist (= your attempts will be optimized away),
but they may kill you unaware anyway (= your program crashes at weird points, or worse).
Your only hope is that they don't exist (= write your program to not create them).
I do hope that will not come to haunt you!
You can add the application folder to your path from a command prompt using:
setx PATH "%PATH%;c:\MinGW\bin"
Note that you will probably need to open a new command window for the modified path setting to go into effect.
The previous answers show 3 approaches
Let me show #4 approach "By using "cbind" and "rename" that works for my case
df <- data.frame(b = c(1, 1, 1), c = c(2, 2, 2), d = c(3, 3, 3))
new_column = c(0, 0, 0)
df <- cbind(new_column, df)
colnames(df)[1] <- "a"
If you are using an input field and an icon (like this example):
<input name="hasta" id="Hasta" type="text" readonly />
<a href="#" id="Hasta_icono" ></a>
You can attach the datepicker to your icon (in my case inside the A tag via CSS) like this:
$("#Hasta").datepicker();
$("#Hasta_icono").click(function() {
$("#Hasta").datepicker( "show" );
});
Try this:
BitmapImage image = new BitmapImage(new Uri("/MyProject;component/Images/down.png", UriKind.Relative));
Why the designers of C# chose to use null as the default value of strings?
Because strings are reference types, reference types are default value is null
. Variables of reference types store references to the actual data.
Let's use default
keyword for this case;
string str = default(string);
str
is a string
, so it is a reference type, so default value is null
.
int str = (default)(int);
str
is an int
, so it is a value type, so default value is zero
.
You could also put your JSON content in a file and pass it to curl using the --upload-file
option via standard input, like this:
echo 'my.awesome.json.function({"do" : "whatever"})' | curl -X POST "http://url" -T -
in Activity just use:
MyActivity.this
in Fragment:
getActivity();
.model small
.stack 100h
.code
Main proc
Mov cx , 30 ; //that number control the loop 30 means the loop will
;excite 30 time
Ioopfront:
Mov ah , 1
Int 21h
Loop loopfront;
this cod will take 30 character
Choosing older simulator versions is not obvious in Xcode 3.2.5. Older Xcodes had separate lists of "iOS Device SDKs" and "iOS Simulator SDKs" in the "Base SDK" build setting popup menu, but in Xcode 3.2.5 these have been replaced with a single "iOS SDKs" list that only offers 4.2 and "latest".
If you create a new default iOS project, it defaults to 4.2 for both Base SDK and Deployment Target, and in the "Overview" popup in the project's top-left corner, only the 4.2 Simulator is available.
To run an older iOS simulator, you must choose an older iOS version in the "iOS Deployment Target" build setting popup. Only then will the "Overview" popup offer older Simulators: back to 4.0 for iPhone and to 3.2 for iPad.
From Tomcat Documentation
maxConnections When this number has been reached, the server will accept, but not process, one further connection. once the limit has been reached, the operating system may still accept connections based on the acceptCount setting. (The maximum queue length for incoming connection requests when all possible request processing threads are in use. Any requests received when the queue is full will be refused. The default value is 100.) For BIO the default is the value of maxThreads unless an Executor is used in which case the default will be the value of maxThreads from the executor. For NIO and NIO2 the default is 10000. For APR/native, the default is 8192. Note that for APR/native on Windows, the configured value will be reduced to the highest multiple of 1024 that is less than or equal to maxConnections. This is done for performance reasons.
maxThreads
The maximum number of request processing threads to be created by this Connector, which therefore determines the maximum number of simultaneous requests that can be handled. If not specified, this attribute is set to 200. If an executor is associated with this connector, this attribute is ignored as the connector will execute tasks using the executor rather than an internal thread pool.
No, you can use a StringWriter
to get rid of the intermediate MemoryStream
. However, to force it into XML you need to use a StringWriter
which overrides the Encoding
property:
public class Utf8StringWriter : StringWriter
{
public override Encoding Encoding => Encoding.UTF8;
}
Or if you're not using C# 6 yet:
public class Utf8StringWriter : StringWriter
{
public override Encoding Encoding { get { return Encoding.UTF8; } }
}
Then:
var serializer = new XmlSerializer(typeof(SomeSerializableObject));
string utf8;
using (StringWriter writer = new Utf8StringWriter())
{
serializer.Serialize(writer, entry);
utf8 = writer.ToString();
}
Obviously you can make Utf8StringWriter
into a more general class which accepts any encoding in its constructor - but in my experience UTF-8 is by far the most commonly required "custom" encoding for a StringWriter
:)
Now as Jon Hanna says, this will still be UTF-16 internally, but presumably you're going to pass it to something else at some point, to convert it into binary data... at that point you can use the above string, convert it into UTF-8 bytes, and all will be well - because the XML declaration will specify "utf-8" as the encoding.
EDIT: A short but complete example to show this working:
using System;
using System.Text;
using System.IO;
using System.Xml.Serialization;
public class Test
{
public int X { get; set; }
static void Main()
{
Test t = new Test();
var serializer = new XmlSerializer(typeof(Test));
string utf8;
using (StringWriter writer = new Utf8StringWriter())
{
serializer.Serialize(writer, t);
utf8 = writer.ToString();
}
Console.WriteLine(utf8);
}
public class Utf8StringWriter : StringWriter
{
public override Encoding Encoding => Encoding.UTF8;
}
}
Result:
<?xml version="1.0" encoding="utf-8"?>
<Test xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<X>0</X>
</Test>
Note the declared encoding of "utf-8" which is what we wanted, I believe.
In Java:
String str = " hello world ";
// prints "hello world"
System.out.println(str.replaceAll("^(\\s+)|(\\s+)$", ""));
In Short,
Logins will have the access of the server.
and
Users will have the access of the database.
Yup, this is possible of course. Here are several examples.
-- one way to do this
DECLARE @Cnt int
SELECT @Cnt = COUNT(SomeColumn)
FROM TableName
GROUP BY SomeColumn
-- another way to do the same thing
DECLARE @StreetName nvarchar(100)
SET @StreetName = (SELECT Street_Name from Streets where Street_ID = 123)
-- Assign values to several variables at once
DECLARE @val1 nvarchar(20)
DECLARE @val2 int
DECLARE @val3 datetime
DECLARE @val4 uniqueidentifier
DECLARE @val5 double
SELECT @val1 = TextColumn,
@val2 = IntColumn,
@val3 = DateColumn,
@val4 = GuidColumn,
@val5 = DoubleColumn
FROM SomeTable
A simple work around(it worked for me) is use the IP address instead of localhost. This should be fine for your development tasks.
Your question is missing most of the necessary information, so I'm going to make some assumptions:
The answer would be:
=IF(COUNTBLANK(F16:G16)<>2,H15+G16-F16,"")
COUNTBLANK
tells you how many cells are unfilled or set to "".
IF
lets you conditionally do one of two things based on whether the first statement is true or false. The second comma separated argument is what to do if it's true, the third comma separated argument is what to do if it's false.
<>
means "not equal to".
The equation says that if the number of blank cells in the range F16:G16
(your credit and debit cells) is not 2, which means both aren't blank, then calculate the equation you provided in your question. Otherwise set the cell to blank(""
).
When you copy this equation to new cells in column H other than H16
, it will update the row references so the proper rows for the credit and debit amounts are looked at.
CAVEAT: This equation is useful if you are just adding entries for credits and debits to the end of a list and want the running total to update automatically. You'd fill this equation down to some arbitrary long length well past the end of actual data. You wouldn't see the running total past the end of the credit/debit entries then, it would just be blank until you filled in a new credit/debit entry. If you left a blank row in your credit debit entries though, the reference to the previous total, H15
, would report blank, which is treated like a 0 in this case.
Suppose you have created a new branch on GitHub with the name feature-branch.
FETCH
git pull --all Pull all remote branches
git branch -a List all branches now
Checkout and switch to the feature-branch directory. You can simply copy the branch name from the output of branch -a command above
git checkout -b feature-branch
VALIDATE
Next use the git branch command to see the current branch. It will show feature-branch with * In front of it
git branch
COMMIT
git add . add all files
git commit -m "Rafactore code or use your message"
Take update and the push changes on the origin server
git pull origin feature-branch
git push origin feature-branch
# dump into file
pg_dump myDB > /tmp/myDB.sql
# create an empty db with the right encoding (on older versions the escaped single quotes are needed!)
psql -c 'CREATE DATABASE "tempDB" WITH OWNER = "myself" LC_COLLATE = '\''de_DE.utf8'\'' TEMPLATE template0;'
# import in the new DB
psql -d tempDB -1 -f /tmp/myDB.sql
# rename databases
psql -c 'ALTER DATABASE "myDB" RENAME TO "myDB_wrong_encoding";'
psql -c 'ALTER DATABASE "tempDB" RENAME TO "myDB";'
# see the result
psql myDB -c "SHOW LC_COLLATE"
This is a bit late, but HotKeys has a very major bug which causes events to get executed multiple times if you attach more than one hotkey to an element. Just use plain jQuery.
$(element).keydown(function(ev) {
if(ev.which == $.ui.keyCode.DOWN) {
// your code
ev.preventDefault();
}
});
In jQuery it would be as simple as $('#yourDivID').empty()
See the documentation.
Update 2016/1/23
If you find this answer useful, you may be interested in a simple (~500 SLOC) password generation library I published:
Install-Package MlkPwgen
Then you can generate random strings just like in the answer below:
var str = PasswordGenerator.Generate(length: 10, allowed: Sets.Alphanumerics);
One advantage of the library is that the code is better factored out so you can use secure randomness for more than generating strings. Check out the project site for more details.
Since no one has provided secure code yet, I post the following in case anyone finds it useful.
string RandomString(int length, string allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") {
if (length < 0) throw new ArgumentOutOfRangeException("length", "length cannot be less than zero.");
if (string.IsNullOrEmpty(allowedChars)) throw new ArgumentException("allowedChars may not be empty.");
const int byteSize = 0x100;
var allowedCharSet = new HashSet<char>(allowedChars).ToArray();
if (byteSize < allowedCharSet.Length) throw new ArgumentException(String.Format("allowedChars may contain no more than {0} characters.", byteSize));
// Guid.NewGuid and System.Random are not particularly random. By using a
// cryptographically-secure random number generator, the caller is always
// protected, regardless of use.
using (var rng = System.Security.Cryptography.RandomNumberGenerator.Create()) {
var result = new StringBuilder();
var buf = new byte[128];
while (result.Length < length) {
rng.GetBytes(buf);
for (var i = 0; i < buf.Length && result.Length < length; ++i) {
// Divide the byte into allowedCharSet-sized groups. If the
// random value falls into the last group and the last group is
// too small to choose from the entire allowedCharSet, ignore
// the value in order to avoid biasing the result.
var outOfRangeStart = byteSize - (byteSize % allowedCharSet.Length);
if (outOfRangeStart <= buf[i]) continue;
result.Append(allowedCharSet[buf[i] % allowedCharSet.Length]);
}
}
return result.ToString();
}
}
Thanks to Ahmad for pointing out how to get the code working on .NET Core.
None of above worked for me. Using Android Studio 3.5 Beta 4. I even selected "do not save, forget passwords after restart" in file>settings>appearance & behavior>System settings>password
So What I did.
VCS>git>remotes
The wb
indicates that the file is opened for writing in binary mode.
When writing in binary mode, Python makes no changes to data as it is written to the file. In text mode (when the b
is excluded as in just w
or when you specify text mode with wt
), however, Python will encode the text based on the default text encoding. Additionally, Python will convert line endings (\n
) to whatever the platform-specific line ending is, which would corrupt a binary file like an exe
or png
file.
Text mode should therefore be used when writing text files (whether using plain text or a text-based format like CSV), while binary mode must be used when writing non-text files like images.
References:
https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files https://docs.python.org/3/library/functions.html#open
import sys
sys.path.append("..") # Adds higher directory to python modules path.
According to this link
Actually, SO_REUSEADDR flag can lead to much greater consequences: SO_REUSADDR permits you to use a port that is stuck in TIME_WAIT, but you still can not use that port to establish a connection to the last place it connected to. What? Suppose I pick local port 1010, and connect to foobar.com port 300, and then close locally, leaving that port in TIME_WAIT. I can reuse local port 1010 right away to connect to anywhere except for foobar.com port 300.
However you can completely avoid TIME_WAIT state by ensuring that the remote end initiates the closure (close event). So the server can avoid problems by letting the client close first. The application protocol must be designed so that the client knows when to close. The server can safely close in response to an EOF from the client, however it will also need to set a timeout when it is expecting an EOF in case the client has left the network ungracefully. In many cases simply waiting a few seconds before the server closes will be adequate.
I also advice you to learn more about networking and network programming. You should now at least how tcp protocol works. The protocol is quite trivial and small and hence, may save you a lot of time in future.
With netstat
command you can easily see which programs ( (program_name,pid) tuple) are binded to which ports and what is the socket current state: TIME_WAIT, CLOSING, FIN_WAIT and so on.
A really good explanation of linux network configurations can be found https://serverfault.com/questions/212093/how-to-reduce-number-of-sockets-in-time-wait.
Wrap your floating <div>
s in a container <div>
that uses this cross-browser min-width hack:
.minwidth { min-width:100px; width: auto !important; width: 100px; }
You may also need to set "overflow" but probably not.
This works because:
!important
declaration, combined with min-width
cause everything to stay on the same line in IE7+min-width
, but it has a bug such that width: 100px
overrides the !important
declaration, causing the container width to be 100px.The typical approach is to use select() to wait until data is available or until the timeout occurs. Only call recv()
when data is actually available. To be safe, we also set the socket to non-blocking mode to guarantee that recv()
will never block indefinitely. select()
can also be used to wait on more than one socket at a time.
import select
mysocket.setblocking(0)
ready = select.select([mysocket], [], [], timeout_in_seconds)
if ready[0]:
data = mysocket.recv(4096)
If you have a lot of open file descriptors, poll() is a more efficient alternative to select()
.
Another option is to set a timeout for all operations on the socket using socket.settimeout()
, but I see that you've explicitly rejected that solution in another answer.
You can pass a name to the unknown key and then write your types:
type StuffBody = {
[key: string]: string;
};
Now you can use it in your type checking:
let stuff: StuffBody = {};
But for FlowType there is no need to have name:
type StuffBody = {
[string]: string,
};
Return a generic 400 status code, and then process that client-side.
Or you can keep the 401, and not return the WWW-Authenticate header, which is really what the browser is responding to with the authentication popup. If the WWW-Authenticate header is missing, then the browser won't prompt for credentials.
Another correct way to get selected value would be using this selector:
$("option[value="0"]:selected")
Best for you!
Try encodeURIComponent.
Encodes a Uniform Resource Identifier (URI) component by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two "surrogate" characters).
Example:
var encoded = encodeURIComponent(str);
This worked for me:
Run the command to install angular cli
npm install -g @angular/cli
I've disabled all unused options in Windows > Preferences > General and it has a huge positive impact on performance, eclipse is still slow when switching tabs, I don't want to increase memory, but it's a lot faster when scrolling. Thx for the tips.
It might be not totally related, but since the question mentioned react uses case (and I keep bumping into this SO thread): There is one important aspect of the double arrow function which is not explicitly mentioned here. Only the 'first' arrow(function) gets named (and thus 'distinguishable' by the run-time), any following arrows are anonymous and from React point of view count as a 'new' object on every render.
Thus double arrow function will cause any PureComponent to rerender all the time.
Example
You have a parent component with a change handler as:
handleChange = task => event => { ... operations which uses both task and event... };
and with a render like:
{
tasks.map(task => <MyTask handleChange={this.handleChange(task)}/>
}
handleChange then used on an input or click. And this all works and looks very nice. BUT it means that any change that will cause the parent to rerender (like a completely unrelated state change) will also re-render ALL of your MyTask as well even though they are PureComponents.
This can be alleviated many ways such as passing the 'outmost' arrow and the object you would feed it with or writing a custom shouldUpdate function or going back to basics such as writing named functions (and binding the this manually...)
A temporary solution is to place the code below in the module build.gradle
:
android {
aaptOptions.cruncherEnabled = false
aaptOptions.useNewCruncher = false
}
And Sync the Project.
The following solution also works as of TS 1.7.5.
// Constancts.ts
export const kNotFoundInArray = -1;
export const AppConnectionError = new Error("The application was unable to connect!");
export const ReallySafeExtensions = ["exe", "virus", "1337h4x"];
To use:
// Main.ts
import {ReallySafeExtensions, kNotFoundInArray} from "./Constants";
if (ReallySafeExtensions.indexOf("png") === kNotFoundInArray) {
console.log("PNG's are really unsafe!!!");
}
To create a user with sudo privileges is to put the user into /etc/sudoers
, or make the user a member of a group specified in /etc/sudoers
. And to make it password-less is to additionally specify NOPASSWD
in /etc/sudoers
.
Example of /etc/sudoers
:
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
## Allows people in group wheel to run all commands
%wheel ALL=(ALL) ALL
## Same thing without a password
%wheel ALL=(ALL) NOPASSWD: ALL
And instead of fiddling with /etc/sudoers
file, we can create a new file in /etc/sudoers.d/
directory since this directory is included by /etc/sudoers
by default, which avoids the possibility of breaking existing sudoers file, and also eliminates the dependency on the content inside of /etc/sudoers
.
To achieve above in Ansible, refer to the following:
- name: sudo without password for wheel group
copy:
content: '%wheel ALL=(ALL:ALL) NOPASSWD:ALL'
dest: /etc/sudoers.d/wheel_nopasswd
mode: 0440
You may replace %wheel
with other group names like %sudoers
or other user names like deployer
.
Unfortunately, neither of answers are good for me. Surprisingly the solution is much simpler. Return from controller:
return new HttpStatusCodeResult(HttpStatusCode.BadRequest, e.Response.ReasonPhrase);
And handle it as standard HTTP error on client as you like.
Take a pointer to the first element instead:
process_data (&something [0]);
The simplest form using ternary operators to solve the problem is:
return a ? (b ? true : c) : (b ? c : false);
You may also want to invest finding a solution by using double negation of the requirement, meaning to say, instead of at least two true values, you need to satisfy the condition at most one false value.
list.Where(m => m.application == "applicationName" &&
m.users.Any(u => u.surname=="surname"));
if you want to filter users as TimSchmelter commented, you can use
list.Where(m => m.application == "applicationName")
.Select(m => new Model
{
application = m.application,
users = m.users.Where(u => u.surname=="surname").ToList()
});
Put the following in some global scope:
Number.prototype.getDecimals = function ( decDigCount ) {
return this.toFixed(decDigCount);
}
and then try:
var a = 56.23232323;
a.getDecimals(2); // will return 56.23
Note that toFixed()
can only work for the number of decimals between 0-20
i.e. a.getDecimals(25)
may generate a javascript error, so to accomodate that you may add some additional check i.e.
Number.prototype.getDecimals = function ( decDigCount ) {
return ( decDigCount > 20 ) ? this : this.toFixed(decDigCount);
}
sDom: "Tfrtip" or via a callback:
"fnHeaderCallback": function(){
$('#YOURTABLENAME-table_length').hide();
}
Here's a simple-and-stupid approach: on input, discretize your polygons into a bitmap. To intersect, AND the bitmaps together. To produce output polygons, trace out the jaggy borders of the bitmap and smooth the jaggies using a polygon-approximation algorithm. (I don't remember if that link gives the most suitable algorithms, it's just the first Google hit. You might check out one of the tools out there to convert bitmap images to vector representations. Maybe you could call on them without reimplementing the algorithm?)
The most complex part would be tracing out the borders, I think.
Back in the early 90s I faced something like this problem at work, by the way. I muffed it: I came up with a (completely different) algorithm that would work on real-number coordinates, but seemed to run into a completely unfixable plethora of degenerate cases in the face of the realities of floating-point (and noisy input). Perhaps with the help of the internet I'd have done better!
in Python 3.2.2 on Windows,
print(""""A word that needs quotation marks" """)
is ok. I think it is the enhancement of Python interpretor.
For Drupal users, this Chris Lane's answer of:
ini_set('memory_limit', '-1');
works but we need to put it just after the opening
<?php
tag in the index.php file in your site's root directory.
Name both your submit buttons the same
<input name="submit" type="submit" id="submit" value="Save" />
<input name="submit" type="submit" id="process" value="Process" />
Then in your controller get the value of submit. Only the button clicked will pass its value.
public ActionResult Index(string submit)
{
Response.Write(submit);
return View();
}
You can of course assess that value to perform different operations with a switch block.
public ActionResult Index(string submit)
{
switch (submit)
{
case "Save":
// Do something
break;
case "Process":
// Do something
break;
default:
throw new Exception();
break;
}
return View();
}
This ensures that resolution occurs from the global namespace, instead of starting at the namespace you're currently in. For instance, if you had two different classes called Configuration
as such:
class Configuration; // class 1, in global namespace
namespace MyApp
{
class Configuration; // class 2, different from class 1
function blah()
{
// resolves to MyApp::Configuration, class 2
Configuration::doStuff(...)
// resolves to top-level Configuration, class 1
::Configuration::doStuff(...)
}
}
Basically, it allows you to traverse up to the global namespace since your name might get clobbered by a new definition inside another namespace, in this case MyApp
.
If you don't have avahi installed then it's probably cups.
Old style string formatting:
In [3]: "%02x" % 127
Out[3]: '7f'
New style
In [7]: '{:x}'.format(127)
Out[7]: '7f'
Using capital letters as format characters yields uppercase hexadecimal
In [8]: '{:X}'.format(127)
Out[8]: '7F'
Docs are here.
The download from java.com
which installs in /Library/Internet Plug-Ins
is only the JRE, for development you probably want to download the JDK from http://www.oracle.com/technetwork/java/javase/downloads/index.html and install that instead. This will install the JDK at /Library/Java/JavaVirtualMachines/jdk1.7.0_<something>.jdk/Contents/Home
which you can then add to Eclipse via Preferences -> Java -> Installed JREs.
Maybe You are trying to open folder with open
, check it once.
I'm not sure if it will add deleted files, but git add .
from the root will add all untracked files.
I think what you are looking for may be
int fsync(int fd);
or
int fdatasync(int fd);
fsync
will flush the file from kernel buffer to the disk. fdatasync
will also do except for the meta data.
First you should create a div
with id='footer'
after your content
div and then simply do this.
Your HTML should look like this:
<html>
<body>
<div id="content">
...
</div>
<div id="footer"></div>
</body>
</html>
And the CSS:
?html, body {
height: 100%;
}
#content {
height: 100%;
}
#footer {
clear: both;
}
Also remember one thing. Very important
You have to specify the command something like this to be more precise
grep -l "pattern" *
You could try setInterval() instead:
var i = setInterval(function(){
//Call ajax here
},10000)
When you install git-scm found in "https://git-scm.com/downloads" uncheck the "Only show new options" located at the very bottom of the installation window
Make sure you check
Click Next and you're good to go!
What about just using the UniqueID of the processor?
var mydiv = $('<div />') // also works
I'd like explain the different alter table syntaxes - See the MySQL documentation
For adding/removing defaults on a column:
ALTER TABLE table_name
ALTER COLUMN col_name {SET DEFAULT literal | DROP DEFAULT}
For renaming a column, changing it's data type and optionally changing the column order:
ALTER TABLE table_name
CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
For changing a column's data type and optionally changing the column order:
ALTER TABLE table_name
MODIFY [COLUMN] col_name column_definition
[FIRST | AFTER col_name]
This is example of my own UserControl with Up and Down key catching.
Xaml code:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="13" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="13" />
<RowDefinition Height="13" />
</Grid.RowDefinitions>
<TextBox Name="NUDTextBox" Grid.Column="0" Grid.Row="0" Grid.RowSpan="2" TextAlignment="Right" PreviewKeyDown="NUDTextBox_PreviewKeyDown" PreviewKeyUp="NUDTextBox_PreviewKeyUp" TextChanged="NUDTextBox_TextChanged"/>
<RepeatButton Name="NUDButtonUP" Grid.Column="1" Grid.Row="0" FontSize="8" FontFamily="Marlett" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Click="NUDButtonUP_Click">5</RepeatButton>
<RepeatButton Name="NUDButtonDown" Grid.Column="1" Grid.Row="1" FontSize="8" FontFamily="Marlett" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Height="13" VerticalAlignment="Bottom" Click="NUDButtonDown_Click">6</RepeatButton>
</Grid>
And the code:
public partial class NumericUpDown : UserControl
{
int minvalue = 0,
maxvalue = 100,
startvalue = 10;
public NumericUpDown()
{
InitializeComponent();
NUDTextBox.Text = startvalue.ToString();
}
private void NUDButtonUP_Click(object sender, RoutedEventArgs e)
{
int number;
if (NUDTextBox.Text != "") number = Convert.ToInt32(NUDTextBox.Text);
else number = 0;
if (number < maxvalue)
NUDTextBox.Text = Convert.ToString(number + 1);
}
private void NUDButtonDown_Click(object sender, RoutedEventArgs e)
{
int number;
if (NUDTextBox.Text != "") number = Convert.ToInt32(NUDTextBox.Text);
else number = 0;
if (number > minvalue)
NUDTextBox.Text = Convert.ToString(number - 1);
}
private void NUDTextBox_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Up)
{
NUDButtonUP.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
typeof(Button).GetMethod("set_IsPressed", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(NUDButtonUP, new object[] { true });
}
if (e.Key == Key.Down)
{
NUDButtonDown.RaiseEvent(new RoutedEventArgs(Button.ClickEvent));
typeof(Button).GetMethod("set_IsPressed", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(NUDButtonDown, new object[] { true });
}
}
private void NUDTextBox_PreviewKeyUp(object sender, KeyEventArgs e)
{
if (e.Key == Key.Up)
typeof(Button).GetMethod("set_IsPressed", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(NUDButtonUP, new object[] { false });
if (e.Key == Key.Down)
typeof(Button).GetMethod("set_IsPressed", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(NUDButtonDown, new object[] { false });
}
private void NUDTextBox_TextChanged(object sender, TextChangedEventArgs e)
{
int number = 0;
if (NUDTextBox.Text!="")
if (!int.TryParse(NUDTextBox.Text, out number)) NUDTextBox.Text = startvalue.ToString();
if (number > maxvalue) NUDTextBox.Text = maxvalue.ToString();
if (number < minvalue) NUDTextBox.Text = minvalue.ToString();
NUDTextBox.SelectionStart = NUDTextBox.Text.Length;
}
}
There does not seem to be a straight-forward way provided by Google or Yahoo finance portals to download the full list of tickers. One possible 'brute force' way to get it is to query their APIs for every possible combinations of letters and save only those that return valid results. As silly as it may seem there are people who actually do it (ie. check this: http://investexcel.net/all-yahoo-finance-stock-tickers/).
You can download lists of symbols from exchanges directly or 3rd party websites as suggested by @Eugene S and @Capn Sparrow, however if you intend to use it to fetch data from Google or Yahoo, you have to sometimes use prefixes or suffixes to make sure that you're getting the correct data. This is because some symbols may repeat between exchanges, so Google and Yahoo prepend or append exchange codes to the tickers in order to distinguish between them. Here's an example:
Company: Vodafone
------------------
LSE symbol: VOD
in Google: LON:VOD
in Yahoo: VOD.L
NASDAQ symbol: VOD
in Google: NASDAQ:VOD
in Yahoo: VOD
import random
import time
import sys
while True:
x=random.randint(1,100)
print('''Guess my number--it's from 1 to 100.''')
z=0
while True:
z=z+1
xx=int(str(sys.stdin.readline()))
if xx > x:
print("Too High!")
elif xx < x:
print("Too Low!")
elif xx==x:
print("You Win!! You used %s guesses!"%(z))
print()
break
else:
break
in this, I first string the number str()
, which converts it into an inoperable number. Then, I int()
integerize it, to make it an operable number. I just tested your problem on my IDLE GUI, and it said that 49.8 < 50.
It is dirty better use the overflow: hidden;
hack:
<div class="container">
<div style="float: left;">Left Div</div>
<div style="float: right;">Right Div</div>
</div>
.container { overflow: hidden; }
Or if you are going to do some fancy CSS3 drop-shadow stuff and you get in trouble with the above solution:
PS
If you want to go for clean I would rather worry about that inline javascript rather than the overflow: hidden;
hack :)
We had this issue on instances in which we changed the service user from Domain1\ServiceUser to Domain2\ServiceUser. The SPNs remained registered under Domain1\ServiceUser, and never registered under Domain2\ServiceUser. We registered the SPNs under Domain2\ServiceUser, but the issue persisted. We then removed the SPNs under Domain1\ServiceUser, and the issue was resolved.
For jQuery versions 1.6+ then
$('#select_all').click( function() {
$('#countries option').prop('selected', true);
});
Or for older versions:
$('#select_all').click( function() {
$('#countries option').attr('selected', 'selected');
});
I just want to add to all great answers above,
that if you write a library it's a good practice to use ConfigureAwait(false)
and get better performance, as said here.
So this snippet seems to be better:
public static async Task DoWork()
{
int[] ids = new[] { 1, 2, 3, 4, 5 };
await Task.WhenAll(ids.Select(i => DoSomething(1, i))).ConfigureAwait(false);
}
A full fiddle link here.
Started getting this again, What actually works now is to add some rubbish inside build.gradle. Then try and sync. When it fails remove the rubbish and re-sync. After indexing, it works.
How about a solution where you put the actual "data" of the table inside its own div, with overflow: scroll;
? Then the browser will automatically create scrollbars for the portion of the "table" you do not want to lock, and you can put the "table header"/first row just above that <div>
.
Not sure how that would work with scrolling horizontally though.
$("#textboxid").on('input propertychange', function () {
//perform operation
});
It will work fine.
int sum=0;
for(int i:A)
sum+=i;
Bash can get the last part of a path without having to call the external basename
:
subdir="/path/to/whatever/${1##*/}"
Add
export PATH=$PATH:/home/me/play
to your ~/.profile
and execute
source ~/.profile
in order to immediately reflect changes to your current terminal instance.
If anyone is looking into this, I've been trying different options and the following approach yields very good results. The following are the steps to get a working example:
Install-Package Tesseract
(https://github.com/charlesw/tesseract).tesseract-ocr-3.02.eng.tar.gz English language data for Tesseract 3.02
.tessdata
directory in your project and place the language data files in it.Properties
of the newly added files and set them to copy on build.System.Drawing
.Samples
directory copy the sample phototest.tif
file into your project directory and set it to copy on build.Program.cs
using System;
using Tesseract;
using System.Diagnostics;
namespace ConsoleApplication
{
class Program
{
public static void Main(string[] args)
{
var testImagePath = "./phototest.tif";
if (args.Length > 0)
{
testImagePath = args[0];
}
try
{
var logger = new FormattedConsoleLogger();
var resultPrinter = new ResultPrinter(logger);
using (var engine = new TesseractEngine(@"./tessdata", "eng", EngineMode.Default))
{
using (var img = Pix.LoadFromFile(testImagePath))
{
using (logger.Begin("Process image"))
{
var i = 1;
using (var page = engine.Process(img))
{
var text = page.GetText();
logger.Log("Text: {0}", text);
logger.Log("Mean confidence: {0}", page.GetMeanConfidence());
using (var iter = page.GetIterator())
{
iter.Begin();
do
{
if (i % 2 == 0)
{
using (logger.Begin("Line {0}", i))
{
do
{
using (logger.Begin("Word Iteration"))
{
if (iter.IsAtBeginningOf(PageIteratorLevel.Block))
{
logger.Log("New block");
}
if (iter.IsAtBeginningOf(PageIteratorLevel.Para))
{
logger.Log("New paragraph");
}
if (iter.IsAtBeginningOf(PageIteratorLevel.TextLine))
{
logger.Log("New line");
}
logger.Log("word: " + iter.GetText(PageIteratorLevel.Word));
}
} while (iter.Next(PageIteratorLevel.TextLine, PageIteratorLevel.Word));
}
}
i++;
} while (iter.Next(PageIteratorLevel.Para, PageIteratorLevel.TextLine));
}
}
}
}
}
}
catch (Exception e)
{
Trace.TraceError(e.ToString());
Console.WriteLine("Unexpected Error: " + e.Message);
Console.WriteLine("Details: ");
Console.WriteLine(e.ToString());
}
Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);
}
private class ResultPrinter
{
readonly FormattedConsoleLogger logger;
public ResultPrinter(FormattedConsoleLogger logger)
{
this.logger = logger;
}
public void Print(ResultIterator iter)
{
logger.Log("Is beginning of block: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Block));
logger.Log("Is beginning of para: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Para));
logger.Log("Is beginning of text line: {0}", iter.IsAtBeginningOf(PageIteratorLevel.TextLine));
logger.Log("Is beginning of word: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Word));
logger.Log("Is beginning of symbol: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Symbol));
logger.Log("Block text: \"{0}\"", iter.GetText(PageIteratorLevel.Block));
logger.Log("Para text: \"{0}\"", iter.GetText(PageIteratorLevel.Para));
logger.Log("TextLine text: \"{0}\"", iter.GetText(PageIteratorLevel.TextLine));
logger.Log("Word text: \"{0}\"", iter.GetText(PageIteratorLevel.Word));
logger.Log("Symbol text: \"{0}\"", iter.GetText(PageIteratorLevel.Symbol));
}
}
}
}
FormattedConsoleLogger.cs
using System;
using System.Collections.Generic;
using System.Text;
using Tesseract;
namespace ConsoleApplication
{
public class FormattedConsoleLogger
{
const string Tab = " ";
private class Scope : DisposableBase
{
private int indentLevel;
private string indent;
private FormattedConsoleLogger container;
public Scope(FormattedConsoleLogger container, int indentLevel)
{
this.container = container;
this.indentLevel = indentLevel;
StringBuilder indent = new StringBuilder();
for (int i = 0; i < indentLevel; i++)
{
indent.Append(Tab);
}
this.indent = indent.ToString();
}
public void Log(string format, object[] args)
{
var message = String.Format(format, args);
StringBuilder indentedMessage = new StringBuilder(message.Length + indent.Length * 10);
int i = 0;
bool isNewLine = true;
while (i < message.Length)
{
if (message.Length > i && message[i] == '\r' && message[i + 1] == '\n')
{
indentedMessage.AppendLine();
isNewLine = true;
i += 2;
}
else if (message[i] == '\r' || message[i] == '\n')
{
indentedMessage.AppendLine();
isNewLine = true;
i++;
}
else
{
if (isNewLine)
{
indentedMessage.Append(indent);
isNewLine = false;
}
indentedMessage.Append(message[i]);
i++;
}
}
Console.WriteLine(indentedMessage.ToString());
}
public Scope Begin()
{
return new Scope(container, indentLevel + 1);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
var scope = container.scopes.Pop();
if (scope != this)
{
throw new InvalidOperationException("Format scope removed out of order.");
}
}
}
}
private Stack<Scope> scopes = new Stack<Scope>();
public IDisposable Begin(string title = "", params object[] args)
{
Log(title, args);
Scope scope;
if (scopes.Count == 0)
{
scope = new Scope(this, 1);
}
else
{
scope = ActiveScope.Begin();
}
scopes.Push(scope);
return scope;
}
public void Log(string format, params object[] args)
{
if (scopes.Count > 0)
{
ActiveScope.Log(format, args);
}
else
{
Console.WriteLine(String.Format(format, args));
}
}
private Scope ActiveScope
{
get
{
var top = scopes.Peek();
if (top == null) throw new InvalidOperationException("No current scope");
return top;
}
}
}
}
I recommend the answers with sed
and awk
for just getting the line number, rather than using grep
to get the entire matching line and then removing that from the output with cut
or another tool. For completeness, you can also use Perl:
perl -nE '/pattern/ && say $.' filename
or Ruby:
ruby -ne 'puts $. if /pattern/' filename
The regular expression in the question misses a lot of edge cases. When detecting URLs, it's always better to use a specialized library that handles international domain names, new TLDs like .museum
, parentheses and other punctuation within and at the end of the URL, and many other edge cases. See the Jeff Atwood's blog post The Problem With URLs for an explanation of some of the other issues.
The best summary of URL matching libraries is in Dan Dascalescu's Answer
(as of Feb 2014)
Add a "g" to the end of the regular expression to enable global matching:
/ig;
But that only fixes the problem in the question where the regular expression was only replacing the first match. Do not use that code.
You can't. Full stop.
switch
is only for integral types, if you want to branch depending on a string you need to use if/else
.
For TypeScript users, if you are importing a built-in Node module (such as http
, path
or url
) and you are getting an error such as "Cannot find module "x"
then the error can be fixed by running
npm install @types/node --save-dev
The command will import the NodeJS TypeScript definitions into your project, allowing you to use Node's built-in modules.
You can forcibly close sockets with ss
command; the ss
command is a tool used to dump socket statistics and displays information in similar fashion (although simpler and faster) to netstat.
To kill any socket in CLOSE_WAIT state, run this (as root)
$ ss --tcp state CLOSE-WAIT --kill
Unless I misunderstand your question, you can just open a file read only. Here is a simply example, without any checks.
To get the file path from the user use this function:
Private Function get_user_specified_filepath() As String
'or use the other code example here.
Dim fd As Office.FileDialog
Set fd = Application.FileDialog(msoFileDialogFilePicker)
fd.AllowMultiSelect = False
fd.Title = "Please select the file."
get_user_specified_filepath = fd.SelectedItems(1)
End Function
Then just open the file read only and assign it to a variable:
dim wb as workbook
set wb = Workbooks.Open(get_user_specified_filepath(), ReadOnly:=True)
Well this is not a right answer but can be consider as a quick workaround. Right answer is turn off Strict SSL.
I am having the same error
PhantomJS not found on PATH
Downloading https://github.com/Medium/phantomjs/releases/download/v2.1.1/phantomjs-2.1.1-windows.zip
Saving to C:\Users\Sam\AppData\Local\Temp\phantomjs\phantomjs-2.1.1-windows.zip
Receiving...
Error making request.
Error: unable to get local issuer certificate
at TLSSocket. (_tls_wrap.js:1105:38)
at emitNone (events.js:106:13)
at TLSSocket.emit (events.js:208:7)
at TLSSocket._finishInit (_tls_wrap.js:639:8)
at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:469:38)
So the after reading the error.
Just downloaded the file manually and placed it on the required path. i.e
C:\Users\Sam\AppData\Local\Temp\phantomjs\
This solved my problem.
PhantomJS not found on PATH
Download already available at C:\Users\sam\AppData\Local\Temp\phantomjs\phantomjs-2.1.1-windows.zip
Verified checksum of previously downloaded file
Extracting zip contents
To "automate" the process of importing the generated .sql
file, while avoiding all the traps that can be hidden in trying to pass files through stdin
and stdout
, just tell MySQL to execute the generated .sql
file using the SOURCE
command in MySQL.
The syntax in the short, but excellent, answer, from Kshitij Sood, gives the best starting point. In short, modify the OP's command according to Kshitij Sood's syntax and replace the commands in that with the SOURCE
command:
#!/bin/bash
mysql -u$user -p$password $dbname -Bse "SOURCE ds_fbids.sql
SOURCE ds_fbidx.sql"
If the database name is included in the generated .sql
file, it can be dropped from the command.
The presumption here is that the generated file is valid as an .sql
file on its own. By not having the file redirected, piped, or in any other manner handled by the shell, there is no issue with needing to escape any of the characters in the generated output because of the shell. The rules with respect to what needs to be escaped in an .sql
file, of course, still apply.
How to deal with the security issues around the password on the command line, or in a my.cnf
file, etc., has been well addressed in other answers, with some excellent suggestions. My favorite answer, from Danny, covers that, including how to handle the issue when dealing with cron
jobs, or anything else.
To address a comment (question?) on the short answer I mentioned: No, it cannot be used with a HEREDOC syntax, as that shell command is given. HEREDOC can be used in the redirection version syntax, (without the -Bse
option), since I/O redirection is what HEREDOC is built around. If you need the functionality of HEREDOC, it would be better to use it in the creation of a .sql
file, even if it's a temporary one, and use that file as the "command" to execute with the MySQL batch line.
#!/bin/bash
cat >temp.sql <<SQL_STATEMENTS
...
SELECT \`column_name\` FROM \`table_name\` WHERE \`column_name\`='$shell_variable';
...
SQL_STATEMENTS
mysql -u $user -p$password $db_name -Be "SOURCE temp.sql"
rm -f temp.sql
Bear in mind that because of shell expansion you can use shell and environment variables within the HEREDOC. The down-side is that you must escape each and every backtick. MySQL uses them as the delimiters for identifiers but the shell, which gets the string first, uses them as executable command delimiters. Miss the escape on a single backtick of the MySQL commands, and the whole thing explodes with errors. The whole issue can be solved by using a quoted LimitString for the HEREDOC:
#!/bin/bash
cat >temp.sql <<'SQL_STATEMENTS'
...
SELECT `column_name` FROM `table_name` WHERE `column_name`='constant_value';
...
SQL_STATEMENTS
mysql -u $user -p$password $db_name -Be "SOURCE temp.sql"
rm -f temp.sql
Removing shell expansion that way eliminates the need to escape the backticks, and other shell-special characters. It also removes the ability to use shell and environment variables within it. That pretty much removes the benefits of using a HEREDOC inside the shell script to begin with.
The other option is to use the multi-line quoted strings allowed in Bash with the batch syntax version (with the -Bse
). I don't know other shells, so I cannot say if they work therein as well. You would need to use this for executing more than one .sql
file with the SOURCE
command anyway, since that is not terminated by a ;
as other MySQL commands are, and only one is allowed per line. The multi-line string can be either single or double quoted, with the normal effects on shell expansion. It also has the same caveats as using the HEREDOC syntax does for backticks, etc.
A potentially better solution would be to use a scripting language, Perl, Python, etc., to create the .sql
file, as the OP did, and SOURCE
that file using the simple command syntax at the top. The scripting languages are much better at string manipulation than the shell is, and most have in-built procedures to handle the quoting and escaping needed when dealing with MySQL.
Bootstrap 4
The display (hidden/visible) classes are changed in Bootstrap 4. To hide on the xs
viewport use:
d-none d-sm-block
Also see: Missing visible-** and hidden-** in Bootstrap v4
Bootstrap 3 (original answer)
Use the hidden-xs
utility class..
<nav class="col-sm-3 hidden-xs">
<ul class="list-unstyled">
<li>Text 10</li>
<li>Text 11</li>
<li>Text 12</li>
</ul>
</nav>
For me the issue was signing into my Google account on the debug Chrome window. This had been working fine for me until I signed in. Once I signed out of that instance of Chrome AND choose to delete all of my settings via the checkbox, the debugger worked fine again.
My non-debugging instance of Chrome was still signed into Google and unaffected. The main issue is that my lovely plugins are gone from the debug version, but at least I can step through client code again.
For comprehensive SFTP support in .NET try edtFTPnet/PRO. It's been around a long time with support for many different SFTP servers.
We also sell an SFTP server for Windows, CompleteFTP, which is an inexpensive way to get support for SFTP on your Windows machine. Also has FTP and FTPS.
You need to stringify the json, not calling toString
var buf = Buffer.from(JSON.stringify(obj));
And for converting string to json obj :
var temp = JSON.parse(buf.toString());
You're almost there, you just have to append:
-Dhttp.proxyUser=someUserName
-Dhttp.proxyPassword=somePassword
Use the timeIntervalSinceDate
method
NSTimeInterval secondsElapsed = [secondDate timeIntervalSinceDate:firstDate];
NSTimeInterval
is just a double
, define in NSDate
like this:
typedef double NSTimeInterval;
Try this it works sudo apt install python-pip pip install boto3
If you're new
ing up an element with initializer syntax, you can do something like this:
var row = new HtmlTableRow
{
Cells =
{
new HtmlTableCell
{
InnerText = text,
Attributes = { ["style"] = "min-width: 35px;" }
},
}
};
Or if using the CssStyleCollection
specifically:
var row = new HtmlTableRow
{
Cells =
{
new HtmlTableCell
{
InnerText = text,
Style = { ["min-width"] = "35px" }
},
}
};
If the string was constructed in the same program, I would recommend using this:
String newline = System.getProperty("line.separator");
boolean hasNewline = word.contains(newline);
But if you are specced to use \n, this driver illustrates what to do:
class NewLineTest {
public static void main(String[] args) {
String hasNewline = "this has a newline\n.";
String noNewline = "this doesn't";
System.out.println(hasNewline.contains("\n"));
System.out.println(hasNewline.contains("\\n"));
System.out.println(noNewline.contains("\n"));
System.out.println(noNewline.contains("\\n"));
}
}
Resulted in
true
false
false
false
In reponse to your comment:
class NewLineTest {
public static void main(String[] args) {
String word = "test\n.";
System.out.println(word.length());
System.out.println(word);
word = word.replace("\n","\n ");
System.out.println(word.length());
System.out.println(word);
}
}
Results in
6
test
.
7
test
.
If you are using Sql Server 2008 or better, you can use something called a Table-Valued Parameter (TVP) instead of serializing & deserializing your list data every time you want to pass it to a stored procedure.
Let's start by creating a simple schema to serve as our playground:
CREATE DATABASE [TestbedDb]
GO
USE [TestbedDb]
GO
/* First, setup the sample program's account & credentials*/
CREATE LOGIN [testbedUser] WITH PASSWORD=N'µ×?
?S[°¿Q¥½q?_Ĭ¼Ð)3õļ%dv', DEFAULT_DATABASE=[master], DEFAULT_LANGUAGE=[us_english], CHECK_EXPIRATION=OFF, CHECK_POLICY=ON
GO
CREATE USER [testbedUser] FOR LOGIN [testbedUser] WITH DEFAULT_SCHEMA=[dbo]
GO
EXEC sp_addrolemember N'db_owner', N'testbedUser'
GO
/* Now setup the schema */
CREATE TABLE dbo.Table1 ( t1Id INT NOT NULL PRIMARY KEY );
GO
INSERT INTO dbo.Table1 (t1Id)
VALUES
(1),
(2),
(3),
(4),
(5),
(6),
(7),
(8),
(9),
(10);
GO
With our schema and sample data in place, we are now ready to create our TVP stored procedure:
CREATE TYPE T1Ids AS Table (
t1Id INT
);
GO
CREATE PROCEDURE dbo.FindMatchingRowsInTable1( @Table1Ids AS T1Ids READONLY )
AS
BEGIN
SET NOCOUNT ON;
SELECT Table1.t1Id FROM dbo.Table1 AS Table1
JOIN @Table1Ids AS paramTable1Ids ON Table1.t1Id = paramTable1Ids.t1Id;
END
GO
With both our schema and API in place, we can call the TVP stored procedure from our program like so:
// Curry the TVP data
DataTable t1Ids = new DataTable( );
t1Ids.Columns.Add( "t1Id",
typeof( int ) );
int[] listOfIdsToFind = new[] {1, 5, 9};
foreach ( int id in listOfIdsToFind )
{
t1Ids.Rows.Add( id );
}
// Prepare the connection details
SqlConnection testbedConnection =
new SqlConnection(
@"Data Source=.\SQLExpress;Initial Catalog=TestbedDb;Persist Security Info=True;User ID=testbedUser;Password=letmein12;Connect Timeout=5" );
try
{
testbedConnection.Open( );
// Prepare a call to the stored procedure
SqlCommand findMatchingRowsInTable1 = new SqlCommand( "dbo.FindMatchingRowsInTable1",
testbedConnection );
findMatchingRowsInTable1.CommandType = CommandType.StoredProcedure;
// Curry up the TVP parameter
SqlParameter sqlParameter = new SqlParameter( "Table1Ids",
t1Ids );
findMatchingRowsInTable1.Parameters.Add( sqlParameter );
// Execute the stored procedure
SqlDataReader sqlDataReader = findMatchingRowsInTable1.ExecuteReader( );
while ( sqlDataReader.Read( ) )
{
Console.WriteLine( "Matching t1ID: {0}",
sqlDataReader[ "t1Id" ] );
}
}
catch ( Exception e )
{
Console.WriteLine( e.ToString( ) );
}
/* Output:
* Matching t1ID: 1
* Matching t1ID: 5
* Matching t1ID: 9
*/
There is probably a less painful way to do this using a more abstract API, such as Entity Framework. However, I do not have the time to see for myself at this time.
I think what are attempting is semantically same as a radio button when 1 is when one of the options is selected and 0 is the other option.
I suggest using the radio button provided by Android by default.
Here is how to use it- http://www.mkyong.com/android/android-radio-buttons-example/
and the android documentation is here-
http://developer.android.com/guide/topics/ui/controls/radiobutton.html
Thanks.
You have multiple columns named the same thing in your inner query, so the error is raised in the outer query. If you get rid of the outer query, it should run, although still be confusing:
SELECT DISTINCT
coaches.id,
people.*,
users.*,
coaches.*
FROM "COACHES"
INNER JOIN people ON people.id = coaches.person_id
INNER JOIN users ON coaches.person_id = users.person_id
LEFT OUTER JOIN organizations_users ON organizations_users.user_id = users.id
WHERE
rownum <= 25
It would be much better (for readability and performance both) to specify exactly what fields you need from each of the tables instead of selecting them all anyways. Then if you really need two fields called the same thing from different tables, use column aliases to differentiate between them.
if you are using mysqli and have two db_connection file. like first one is
define('HOST','localhost');
define('USER','user');
define('PASS','passs');
define('**DB1**','database_name1');
$connMitra = new mysqli(HOST, USER, PASS, **DB1**);
second one is
define('HOST','localhost');
define('USER','user');
define('PASS','passs');
define(**'DB2**','database_name1');
$connMitra = new mysqli(HOST, USER, PASS, **DB2**);
SO just change the name of parameter pass in mysqli like DB1 and DB2. if you pass same parameter in mysqli suppose DB1 in both file then second database will no connect any more. So remember when you use two or more connection pass different parameter name in mysqli function
I use the following maven dependencies to get java mail working. The first one includes the javax.mail API (with no implementation) and the second one is the SUN implementation of the javax.mail API.
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.5.5</version>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.5</version>
</dependency>
I would use this:
select t.*
from test as t
join
(select max(rev) as rev
from test
group by id) as o
on o.rev = t.rev
Subquery SELECT is not too eficient maybe, but in JOIN clause seems to be usable. I'm not an expert in optimizing queries, but I've tried at MySQL, PostgreSQL, FireBird and it does work very good.
You can use this schema in multiple joins and with WHERE clause. It is my working example (solving identical to yours problem with table "firmy"):
select *
from platnosci as p
join firmy as f
on p.id_rel_firmy = f.id_rel
join (select max(id_obj) as id_obj
from firmy
group by id_rel) as o
on o.id_obj = f.id_obj and p.od > '2014-03-01'
It is asked on tables having teens thusands of records, and it takes less then 0,01 second on really not too strong machine.
I wouldn't use IN clause (as it is mentioned somewhere above). IN is given to use with short lists of constans, and not as to be the query filter built on subquery. It is because subquery in IN is performed for every scanned record which can made query taking very loooong time.
There is probably a more efficient solution to your question, but following formula should do the trick:
=SUM(COUNTIFS(J1:J196,"agree",A1:A196,"yes"),COUNTIFS(J1:J196,"agree",A1:A196,"no"))
Here the Implementation of Paul Burkes answer:
public class ShadowImageView extends ImageView {
public ShadowImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public ShadowImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ShadowImageView(Context context) {
super(context);
}
private Paint createShadow() {
Paint mShadow = new Paint();
float radius = 10.0f;
float xOffset = 0.0f;
float yOffset = 2.0f;
// color=black
int color = 0xFF000000;
mShadow.setShadowLayer(radius, xOffset, yOffset, color);
return mShadow;
}
@Override
protected void onDraw(Canvas canvas) {
Paint mShadow = createShadow();
Drawable d = getDrawable();
if (d != null){
setLayerType(LAYER_TYPE_SOFTWARE, mShadow);
Bitmap bitmap = ((BitmapDrawable) getDrawable()).getBitmap();
canvas.drawBitmap(bitmap, 0.0f, 0.0f, mShadow);
} else {
super.onDraw(canvas);
}
};
}
TODO:
execute setLayerType(LAYER_TYPE_SOFTWARE, mShadow);
only if API Level is > 10
Use second process. Declare at AndroidManifest
new Service
with
android:process=":second"
Exchange between first and second process over BroadcastReceiver
You should have written what version of Oracle you use. You most likely use something else than Oracle 11g, that's why you can't shrink a temp tablespace.
Alternatives:
1) alter database tempfile '[your_file]' resize 128M;
which will probably fail
2) Drop and recreate the tablespace. If the temporary tablespace you want to shrink is your default temporary tablespace, you may have to first create a new temporary tablespace, set it as the default temporary tablespace then drop your old default temporary tablespace and recreate it. Afterwards drop the second temporary table created.
3) For Oracle 9i and higher you could just drop the tempfile(s) and add a new one(s)
Everything is described here in great detail.
See this link: http://databaseguide.blogspot.com/2008/06/resizing-temporary-tablespace.html
It was already linked, but maybe you missed it, so here it is again.
The solution tbaxter120 suggested worked for me but I needed something that will be supported both in MySQL & Oracle & MSSQL, and here it is:
WHERE (CONCAT(',' ,CONCAT(RTRIM(MyColumn), ','))) LIKE CONCAT('%,' , CONCAT(@search , ',%'))
Try adding the following line at the top of your python script.
# _*_ coding:utf-8 _*_
You can either create a static method or use the other class as a member of your class calling the function in the constructor.
public class aClass {
private SomeOtherClass oc;
public class aClass( SomeOtherClass otherClass) {
oc = otherClass;
}
public callOtherClassMethod() {
oc.otherClassMethod();
}
}
The exec
system call of the Linux kernel understands shebangs (#!
) natively
When you do on bash:
./something
on Linux, this calls the exec
system call with the path ./something
.
This line of the kernel gets called on the file passed to exec
: https://github.com/torvalds/linux/blob/v4.8/fs/binfmt_script.c#L25
if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!'))
It reads the very first bytes of the file, and compares them to #!
.
If the comparison is true, then the rest of the line is parsed by the Linux kernel, which makes another exec
call with path /usr/bin/python3
and current file as the first argument:
/usr/bin/python3 /path/to/script.py
and this works for any scripting language that uses #
as a comment character.
And analogously, if you decide to use env
instead, which you likely should always do to work on systems that have the python3
in a different location, notably pyenv
, see also this question, the shebang:
#!/usr/bin/env python3
ends up calling analogously:
/usr/bin/env python3 /path/to/script.py
which does what you expect from env python3
: searches PATH
for python3
and runs /usr/bin/python3 /path/to/script.py
.
And yes, you can make an infinite loop with:
printf '#!/a\n' | sudo tee /a
sudo chmod +x /a
/a
Bash recognizes the error:
-bash: /a: /a: bad interpreter: Too many levels of symbolic links
#!
just happens to be human readable, but that is not required.
If the file started with different bytes, then the exec
system call would use a different handler. The other most important built-in handler is for ELF executable files: https://github.com/torvalds/linux/blob/v4.8/fs/binfmt_elf.c#L1305 which checks for bytes 7f 45 4c 46
(which also happens to be human readable for .ELF
). Let's confirm that by reading the 4 first bytes of /bin/ls
, which is an ELF executable:
head -c 4 "$(which ls)" | hd
output:
00000000 7f 45 4c 46 |.ELF|
00000004
So when the kernel sees those bytes, it takes the ELF file, puts it into memory correctly, and starts a new process with it. See also: How does kernel get an executable binary file running under linux?
Finally, you can add your own shebang handlers with the binfmt_misc
mechanism. For example, you can add a custom handler for .jar
files. This mechanism even supports handlers by file extension. Another application is to transparently run executables of a different architecture with QEMU.
I don't think POSIX specifies shebangs however: https://unix.stackexchange.com/a/346214/32558 , although it does mention in on rationale sections, and in the form "if executable scripts are supported by the system something may happen". macOS and FreeBSD also seem to implement it however.
PATH
search motivation
Likely, one big motivation for the existence of shebangs is the fact that in Linux, we often want to run commands from PATH
just as:
basename-of-command
instead of:
/full/path/to/basename-of-command
But then, without the shebang mechanism, how would Linux know how to launch each type of file?
Hardcoding the extension in commands:
basename-of-command.py
or implementing PATH search on every interpreter:
python3 basename-of-command
would be a possibility, but this has the major problem that everything breaks if we ever decide to refactor the command into another language.
Shebangs solve this problem beautifully.
See also: Why do people write #!/usr/bin/env python on the first line of a Python script?
Since the OP is just development/testing, less than sleek solutions may be helpful:
setcap can be used on a script's interpreter to grant capabilities to scripts. If setcaps on the global interpreter binary is not acceptable, make a local copy of the binary (any user can) and get root to setcap on this copy. Python2 (at least) works properly with a local copy of the interpreter in your script development tree. No suid is needed so the root user can control to what capabilities users have access.
If you need to track system-wide updates to the interpreter, use a shell script like the following to run your script:
#!/bin/sh
#
# Watch for updates to the Python2 interpreter
PRG=python_net_raw
PRG_ORIG=/usr/bin/python2.7
cmp $PRG_ORIG $PRG || {
echo ""
echo "***** $PRG_ORIG has been updated *****"
echo "Run the following commands to refresh $PRG:"
echo ""
echo " $ cp $PRG_ORIG $PRG"
echo " # setcap cap_net_raw+ep $PRG"
echo ""
exit
}
./$PRG $*
you can use any of the following five ways to hide element, depends upon your requirements.
.hide {
opacity: 0;
}
.hide {
visibility: hidden;
}
.hide {
display: none;
}
.hide {
position: absolute;
top: -9999px;
left: -9999px;
}
.hide {
clip-path: polygon(0px 0px,0px 0px,0px 0px,0px 0px);
}
To show use any of the following: opacity: 1; visibility: visible; display: block;
Source : https://www.sitepoint.com/five-ways-to-hide-elements-in-css/
onmouseover="$('.play-detail').stop().animate({'height': '84px'},'300');"
onmouseout="$('.play-detail').stop().animate({'height': '44px'},'300');"
Just put two stops -- one onmouseover and one onmouseout.
The parent div (I assume the outermost div) is display: block
and will fill up all available area of its container (in this case, the body) that it can. Use a different display type -- inline-block
is probably what you are going for:
If you simply need to get whatever is between []
, the you can use \[([^\]]*)\]
like this:
Pattern regex = Pattern.compile("\\[([^\\]]*)\\]");
Matcher m = regex.matcher(str);
if (m.find()) {
result = m.group();
}
If you need it to be of the form identifier + [ + content + ]
then you can limit extracting the content only when the identifier is a alphanumerical:
[a-zA-Z][a-z-A-Z0-9_]*\s*\[([^\]]*)\]
This will validate things like Foo [Bar]
, or myDevice_123["input"]
for instance.
Main issue
The main problem is when you want to extract the content of something like this:
FOO[BAR[CAT[123]]+DOG[FOO]]
The Regex won't work and will return BAR[CAT[123
and FOO
.
If we change the Regex to \[(.*)\]
then we're OK but then, if you're trying to extract the content from more complex things like:
FOO[BAR[CAT[123]]+DOG[FOO]] = myOtherFoo[BAR[5]]
None of the Regexes will work.
The most accurate Regex to extract the proper content in all cases would be a lot more complex as it would need to balance []
pairs and give you they content.
A simpler solution
If your problems is getting complex and the content of the []
arbitrary, you could instead balance the pairs of []
and extract the string using plain old code rathe than a Regex:
int i;
int brackets = 0;
string c;
result = "";
for (i = input.indexOf("["); i < str.length; i++) {
c = str.substring(i, i + 1);
if (c == '[') {
brackets++;
} else if (c == ']') {
brackets--;
if (brackets <= 0)
break;
}
result = result + c;
}
This is more pseudo-code than real code, I'm not a Java coder so I don't know if the syntax is correct, but it should be easy enough to improve upon.
What count is that this code should work and allow you to extract the content of the []
, however complex it is.
You need to add a Serializable
attribute to the class which you want to serialize.
[Serializable]
public class OrgPermission
Guys, don´t scare the crap out of others (hey! just kidding), but it´s really all a question of equivalences and synonyms:
firstly:
"XAND" doesn´t exist logically, neither does "XNAND", however "XAND" is normally thought-up by a studious but confused initiating logic student.(wow!). It com from the thought that, if there´s a XOR(exclusive OR) it´s logical to exist a "XAND"("exclusive" AND). The rational suggestion would be an "IAND"("inclusive" AND), which isn´t used or recognised as well. So:
XNOR <=> !XOR <=> EQV
And all this just discribes a unique operator, called the equivalency operator(<=>, EQV) so:
A | B | A <=> B | A XAND B | A XNOR B | A !XOR B | ((NOT(A) AND B)AND(A AND NOT(B)))
---------------------------------------------------------------------------------------
T | T | T | T | T | T | T
T | F | F | F | F | F | F
F | T | F | F | F | F | F
F | F | T | T | T | T | T
And just a closing comment: The 'X' prefix is only possible if and only if the base operator isn´t unary. So, XNOR <=> NOT XOR <=/=> X NOR.
Peace.
Group Join method is unnecessary to achieve joining of two data sets.
Inner Join:
var qry = Foos.SelectMany
(
foo => Bars.Where (bar => foo.Foo_id == bar.Foo_id),
(foo, bar) => new
{
Foo = foo,
Bar = bar
}
);
For Left Join just add DefaultIfEmpty()
var qry = Foos.SelectMany
(
foo => Bars.Where (bar => foo.Foo_id == bar.Foo_id).DefaultIfEmpty(),
(foo, bar) => new
{
Foo = foo,
Bar = bar
}
);
EF and LINQ to SQL correctly transform to SQL. For LINQ to Objects it is beter to join using GroupJoin as it internally uses Lookup. But if you are querying DB then skipping of GroupJoin is AFAIK as performant.
Personlay for me this way is more readable compared to GroupJoin().SelectMany()
you can use this great library https://github.com/BluRe-CN/ComplexView and it is really easy to use
I'm getting the same solution as @camino's comment on https://stackoverflow.com/a/19365454/10593190 and XavierStuvw's reply.
I got it to work (for installing ffmpeg) by simply reinstalling the whole thing from the beginning with all instances of $ ./configure
replaced by $ ./configure --enable-shared
(first make sure to delete all the folders and files including the .so files from the previous attempt).
Apparently this works because https://stackoverflow.com/a/13812368/10593190.
Define an Extension Method on DateTime like so:
public static class DateTimeExtensions
{
public static bool IsWorkingDay(this DateTime date)
{
return date.DayOfWeek != DayOfWeek.Saturday
&& date.DayOfWeek != DayOfWeek.Sunday;
}
}
Then, use is within a Where clause to filter a broader list of dates:
var allDates = GetDates(); // method which returns a list of dates
// filter dates by working day's
var countOfWorkDays = allDates
.Where(day => day.IsWorkingDay())
.Count() ;
Assuming you have a jre folder, which contains bin, lib, etc files copied from a Java Runtime distribution, in the same folder as eclipse.ini, you can set in your eclilpse.ini
-vm
jre\bin\javaw.exe
I think this can be done as follows:
class ColorComparator implements Comparator<CarSort>
{
private List<String> sortOrder;
public ColorComparator (List<String> sortOrder){
this.sortOrder = sortOrder;
}
public int compare(CarSort c1, CarSort c2)
{
String a1 = c1.getColor();
String a2 = c2.getColor();
return sortOrder.indexOf(a1) - sortOrder.indexOf(a2);
}
}
For sorting use this:
Collections.sort(carList, new ColorComparator(sortOrder));
Your Last Edittext .setOnEditorActionListener call this method automatic hit api
I was Call in LoginActivity in et_password
et_Pass.setOnEditorActionListener(new TextView.OnEditorActionListener() {
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) || (actionId == EditorInfo.IME_ACTION_DONE)) {
Log.i(TAG,"Enter pressed");
Log.i(Check Internet," and Connect To Server");
}
return false;
}
});
Working Fine
No. Any valid string is a valid key. It can even have "
as long as you escape it:
{"The \"meaning\" of life":42}
There is perhaps a chance you'll encounter difficulties loading such values into some languages, which try to associate keys with object field names. I don't know of any such cases, however.
When you send bytes from a buffer with a normal TCP socket, the send function returns the number of bytes of the buffer that were sent. If it is a non-blocking socket or a non-blocking send then the number of bytes sent may be less than the size of the buffer. If it is a blocking socket or blocking send, then the number returned will match the size of the buffer but the call may block. With WebSockets, the data that is passed to the send method is always either sent as a whole "message" or not at all. Also, browser WebSocket implementations do not block on the send call.
But there are more important differences on the receiving side of things. When the receiver does a recv
(or read
) on a TCP socket, there is no guarantee that the number of bytes returned corresponds to a single send (or write) on the sender side. It might be the same, it may be less (or zero) and it might even be more (in which case bytes from multiple send/writes are received). With WebSockets, the recipient of a message is event-driven (you generally register a message handler routine), and the data in the event is always the entire message that the other side sent.
Note that you can do message based communication using TCP sockets, but you need some extra layer/encapsulation that is adding framing/message boundary data to the messages so that the original messages can be re-assembled from the pieces. In fact, WebSockets is built on normal TCP sockets and uses frame headers that contains the size of each frame and indicate which frames are part of a message. The WebSocket API re-assembles the TCP chunks of data into frames which are assembled into messages before invoking the message event handler once per message.
You probably do not need to be making lists and appending them to make your array. You can likely just do it all at once, which is faster since you can use numpy to do your loops instead of doing them yourself in pure python.
To answer your question, as others have said, you cannot access a nested list with two indices like you did. You can if you convert mean_data
to an array before not after you try to slice it:
R = np.array(mean_data)[:,0]
instead of
R = np.array(mean_data[:,0])
But, assuming mean_data has a shape nx3
, instead of
R = np.array(mean_data)[:,0]
P = np.array(mean_data)[:,1]
Z = np.array(mean_data)[:,2]
You can simply do
A = np.array(mean_data).mean(axis=0)
which averages over the 0
th axis and returns a length-n
array
But to my original point, I will make up some data to try to illustrate how you can do this without building any lists one item at a time:
Use the CSS3 Viewport-percentage feature.
Viewport-Percentage Explanation
Assuming you want the body width size to be a ratio of the browser's view port. I added a border so you can see the body resize as you change your browser width or height. I used a ratio of 90% of the view-port size.
<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
<head>_x000D_
<title>Styles</title>_x000D_
_x000D_
<style>_x000D_
@media screen and (min-width: 480px) {_x000D_
body {_x000D_
background-color: skyblue;_x000D_
width: 90vw;_x000D_
height: 90vh;_x000D_
border: groove black;_x000D_
}_x000D_
_x000D_
div#main {_x000D_
font-size: 3vw;_x000D_
}_x000D_
}_x000D_
</style>_x000D_
_x000D_
</head>_x000D_
<body>_x000D_
<div id="main">_x000D_
Viewport-Percentage Test_x000D_
</div>_x000D_
</body>_x000D_
</html>
_x000D_
I had the same problem. And to fix it, I copy the Zipalign file from sdk/build-tools/android-4.4W folder to sdk/tools/
Edited: Since Google updated SDK for Android, new build-tools does fix this problem. So I encouraged everyone to update to Android SDK Build-tools 20 as suggested by Pang in the post below.
It is called 'favicon' and you need to add below code to the header section of your website.
Simply add this to the <head>
section.
<link rel="icon" href="/your_path_to_image/favicon.jpg">
String methodName= "...";
String[] args = {};
Method[] methods = clazz.getMethods();
for (Method m : methods) {
if (methodName.equals(m.getName())) {
// for static methods we can use null as instance of class
m.invoke(null, new Object[] {args});
break;
}
}
Update: Incredibly frustrating, but the Google redirect of the maven.google.com
repo seems to mess with loading the resources. If you instead set your repository to
maven { url 'https://dl.google.com/dl/android/maven2' }
the files will resolve. You can prove this out by attempting to get the fully qualified resource at https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.0.0-alpha1/gradle-3.0.0-alpha1.pom
3.0.0 Alpha
This is because currently the gradle:3.0.0-alpha1
is only being served via the new 'https://maven.google.com'
repository, but the site currently 404s at that location otherwise, being a public directory, you'd see a tree listing of all the files available by simply navigating to that location in your browser. When they resolve their outage, your CI build should pass immediately.
I wasn't satisfied with any of the answers, so I made Yet Another Enum (YEA!).
This implementation:
colors.RED
), string (colors["RED"]
), and index (colors[0]
), but you only need to pass in the strings as an arraytoString()
and valueOf()
functions to each enum object (if this is somehow not desired, one can simply remove it - small overhead for JS though)Special thanks to Andre 'Fi''s answer for some inspiration.
The codes:
class Enums {
static create({ name = undefined, items = [] }) {
let newEnum = {};
newEnum.length = items.length;
newEnum.items = items;
for (let itemIndex in items) {
//Map by name.
newEnum[items[itemIndex]] = parseInt(itemIndex, 10);
//Map by index.
newEnum[parseInt(itemIndex, 10)] = items[itemIndex];
}
newEnum.toString = Enums.enumToString.bind(newEnum);
newEnum.valueOf = newEnum.toString;
//Optional naming and global registration.
if (name != undefined) {
newEnum.name = name;
Enums[name] = newEnum;
}
//Prevent modification of the enum object.
Object.freeze(newEnum);
return newEnum;
}
static enumToString() {
return "Enum " +
(this.name != undefined ? this.name + " " : "") +
"[" + this.items.toString() + "]";
}
}
Usage:
let colors = Enums.create({
name: "COLORS",
items: [ "RED", "GREEN", "BLUE", "PORPLE" ]
});
//Global access, if named.
Enums.COLORS;
colors.items; //Array(4) [ "RED", "GREEN", "BLUE", "PORPLE" ]
colors.length; //4
colors.RED; //0
colors.GREEN; //1
colors.BLUE; //2
colors.PORPLE; //3
colors[0]; //"RED"
colors[1]; //"GREEN"
colors[2]; //"BLUE"
colors[3]; //"PORPLE"
colors.toString(); //"Enum COLORS [RED,GREEN,BLUE,PORPLE]"
//Enum frozen, makes it a real enum.
colors.RED = 9001;
colors.RED; //0
I was facing the same issue and for me downgrading the JAVA_HOME
from jdk12 was not the plausible option like said in the answer. So I did a trial and error experiment and I got the Jenkins running without even downgrading the version of JAVA_HOME
.
$ sudo vi /etc/init.d/jenkins
#JAVA=`type -p java`
JAVA=`type -p /usr/lib/jdk8/bin/java`
$ sudo systemctl daemon-reload
$ sudo systemctl start jenkins
? jenkins.service - LSB: Start Jenkins at boot time
Loaded: loaded (/etc/init.d/jenkins; generated)
Active: active (exited) since Sun 2020-05-31 21:05:30 CEST; 9min ago
Docs: man:systemd-sysv-generator(8)
Process: 9055 ExecStart=/etc/init.d/jenkins start (code=exited, status=0/SUCCESS)
The below should work for you assuming Strings is the array that you are searching within:
Arrays.binarySearch(Strings,"mykeytosearch",mysearchComparator);
where mykeytosearch is the string that you want to test for existence within the array. mysearchComparator - is a comparator that would be used to compare strings.
Refer to Arrays.binarySearch for more information.
string outString= number.ToString("####0.00");
I am doing the below for page redirection(from login to home page). I have to pass the user object also to the home page. so, i am using windows localstorage.
$http({
url:'/login/user',
method : 'POST',
headers: {
'Content-Type': 'application/json'
},
data: userData
}).success(function(loginDetails){
$scope.updLoginDetails = loginDetails;
if($scope.updLoginDetails.successful == true)
{
loginDetails.custId = $scope.updLoginDetails.customerDetails.cust_ID;
loginDetails.userName = $scope.updLoginDetails.customerDetails.cust_NM;
window.localStorage.setItem("loginDetails", JSON.stringify(loginDetails));
$window.location='/login/homepage';
}
else
alert('No access available.');
}).error(function(err,status){
alert('No access available.');
});
And it worked for me.
While the solutions here are workable, more recent technology has made for what I think is a better solution. CSS Grid Layout allows us to structure a more elegant solution.
The CSS below provides a 2-column "settings" structure, where the first column is expected to be a right-aligned label, followed by some content in the second column. More complicated content can be presented in the second column by wrapping it in a <div>.
[As a side-note: I use CSS to add the ':' that trails each label, as this is a stylistic element - my preference.]
/* CSS */_x000D_
_x000D_
div.settings {_x000D_
display:grid;_x000D_
grid-template-columns: max-content max-content;_x000D_
grid-gap:5px;_x000D_
}_x000D_
div.settings label { text-align:right; }_x000D_
div.settings label:after { content: ":"; }
_x000D_
<!-- HTML -->_x000D_
_x000D_
<div class="settings">_x000D_
<label>Label #1</label>_x000D_
<input type="text" />_x000D_
_x000D_
<label>Long Label #2</label>_x000D_
<span>Display content</span>_x000D_
_x000D_
<label>Label #3</label>_x000D_
<input type="text" />_x000D_
</div>
_x000D_
js no for 100 array
// string arr
const arr = [...``.padStart(100, ` `)].map((item, i) => i + 1 + ``);
// (100) ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100"]
// number arr
const arr = [...``.padStart(100, ` `)].map((item, i) => i + 1);
// (100) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]
Uint8Array
// number arr
const arr = new Uint8Array(100).map((item, i) => i + 1);
// Uint8Array(100) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]
// string arr
const arr = [...new Uint8Array(100).map((item, i) => i + 1)].map((item, i) => i + 1 + ``);
// (100) ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100"]
Your pointer is pointing to local variable of the function. So as soon as you return from the function, memory gets deallocated. You have to assign memory on heap in order to use it in other functions.
Instead
char *rtnPtr = word;
do this
char *rtnPtr = malloc(length);
So that it is available in the main function. After it is used free the memory.
You can override values in php.ini from your PHP code using ini_set()
.
I don't think there is a way to ignore adding DEFINER
s to the dump. But there are ways to remove them after the dump file is created.
Open the dump file in a text editor and replace all occurrences of DEFINER=root@localhost
with an empty string ""
Edit the dump (or pipe the output) using perl
:
perl -p -i.bak -e "s/DEFINER=\`\w.*\`@\`\d[0-3].*[0-3]\`//g" mydatabase.sql
mysqldump ... | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' > triggers_backup.sql
For anyone stumbling on this question, here is the answer if you are doing C++: You can check in your cpp code for vs version like the example bellow which links against a library based on vs version being 2015 or higher:
#if (_MSC_VER > 1800)
#pragma comment (lib, "legacy_stdio_definitions.lib")
#endif
This is done at link time and no extra run-time cost.
You can try any one of the following
1)Change the gradle.properties file and change the heap size as per your requirement.
If org.gradle.jvmargs=-Xmx2048M is not sufficient then change to 4096 as given
2)"Edit Custom VM Options" from the Help menu.
It will open studio.vmoptions / studio64.exe.vmoptions file.
-Xms128m
-Xmx4096m
-XX:MaxPermSize=1024m
-XX:ReservedCodeCacheSize=200m
-XX:+UseCompressedOops
Save the the file and restart Android Studio.
You don't need anything special for adding paramaters. Just like you had it.
Route::get('groups/(:any)', array('as' => 'group', 'uses' => 'groups@show'));
class Groups_Controller extends Base_Controller {
public $restful = true;
public function get_show($groupID) {
return 'I am group id ' . $groupID;
}
}
The answers so far describe why, but here is a something else you might want to consider:
You can can call a method from an instantiable class by appending a method call to its constructor,
Object instance = new Constuctor().methodCall();
or
primitive name = new Constuctor().methodCall();
This is useful it you only wish to use a method of an instantiable class once within a single scope. If you are calling multiple methods from an instantiable class within a single scope, definitely create a referable instance.
pg_dump as insert statements
pg_dump -d -O database filename
-d ( data as inserts ) -O ( capital O is no owner )
Then pipe the backup file back in to PostgreSQL using:
psql -d database -U username -h hostname < filename
As there is no owner included then all of the created table, schema, etc, are created under the login user you specify.
I have read this could be a good approach for migrating between PostgreSQL versions as well.
Python 3:
urllib.parse.quote_plus(string, safe='', encoding=None, errors=None)
I had the same error here but with glassfish server. Maybe it can help. I needed to configure the glassfish-web.xml file with the content inside the <resources>
from glassfish-resources.xml. As I got another error I could find this annotation in the server log:
Caused by: java.lang.RuntimeException: Error in parsing WEB-INF/glassfish-web.xml for archive [file:/C:/Users/Win/Documents/NetBeansProjects/svad/build/web/]: The xml element should be [glassfish-web-app] rather than [resources]
All I did then was to change the <resources>
tag and apply <glassfish-web-app>
in the glassfish-web.xml file.
Just a side note for anyone that stumbles onto this same inquiry... My Operating System is 64 bit - so of course I downloaded the 64 bit MySQL driver... however, my Office applications are 32 bit... Once I downloaded the 32 bit version, the error went away and I could move forward.
Simplest Kotlin solution using extension functions:
fun String.isEmailValid() =
Pattern.compile(
"[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
"\\@" +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
"(" +
"\\." +
"[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
")+"
).matcher(this).matches()
and then you can validate like this:
"[email protected]".isEmailValid()
If you are in kotlin-multiplatform without access to Pattern
, this is the equivalent:
fun String.isValidEmail() = Regex(emailRegexStr).matches(this)