because when the constructor is called, the bean is not yet initialized - i.e. no dependencies are injected. In the @PostConstruct
method the bean is fully initialized and you can use the dependencies.
because this is the contract that guarantees that this method will be invoked only once in the bean lifecycle. It may happen (though unlikely) that a bean is instantiated multiple times by the container in its internal working, but it guarantees that @PostConstruct
will be invoked only once.
You can do it programmatically by reading the java
system properties
@Test
public void javaVersion() {
System.out.println(System.getProperty("java.version"));
System.out.println(System.getProperty("java.runtime.version"));
System.out.println(System.getProperty("java.home"));
System.out.println(System.getProperty("java.vendor"));
System.out.println(System.getProperty("java.vendor.url"));
System.out.println(System.getProperty("java.class.path"));
}
This will output somthing like
1.7.0_17
1.7.0_17-b02
C:\workspaces\Oracle\jdk1.7\jre
Oracle Corporation
http://java.oracle.com/
C:\workspaces\Misc\Miscellaneous\bin; ...
The first line shows the version number. You can parse it an see whether it fits your minimun required java version or not. You can find a description for the naming convention here and more infos here.
public static class AsyncHelper
{
private static readonly TaskFactory _taskFactory = new
TaskFactory(CancellationToken.None,
TaskCreationOptions.None,
TaskContinuationOptions.None,
TaskScheduler.Default);
public static TResult RunSync<TResult>(Func<Task<TResult>> func)
=> _taskFactory
.StartNew(func)
.Unwrap()
.GetAwaiter()
.GetResult();
public static void RunSync(Func<Task> func)
=> _taskFactory
.StartNew(func)
.Unwrap()
.GetAwaiter()
.GetResult();
}
Then
AsyncHelper.RunSync(() => DoAsyncStuff());
if you use that class pass your async method as parameter you can call the async methods from sync methods in a safe way.
it's explained here : https://cpratt.co/async-tips-tricks/
str.replace(/replacetext/g,'actualtext')
This replaces all instances of replacetext
with actualtext
I was getting this error even if I did all the solutions mentioned above.
by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfig ...
At some point when i look up the POM there was this dependency in it
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
And the Pojo class had the following imports
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
Which clearly shows the application was expecting a datasource.
What I did was I removed the JPA dependency from pom and replaced the imports for the pojo with the following once
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
Finally I got SUCCESSFUL build. Check it out you might have run into the same problem
There really seems no way for fooling the <a href= ..
into a POST method. However, given that you have access to CSS of a page, this can be substituted by using a form instead.
Unfortunately, the obvious way of just styling the button in CSS as an anchor tag, is not cross-browser compatible, since different browsers treat <button value= ...
differently.
Incorrect:
<form action='actbusy.php' method='post'>
<button type='submit' name='parameter' value='One'>Two</button>
</form>
The above example will be showing 'Two' and transmit 'parameter:One' in FireFox, while it will show 'One' and transmit also 'parameter:One' in IE8.
The way around is to use hidden input field(s) for delivering data and the button just for submitting it.
<form action='actbusy.php' method='post'>
<input class=hidden name='parameter' value='blaah'>
<button type='submit' name='delete' value='Delete'>Delete</button>
</form>
Note, that this method has a side effect that besides 'parameter:blaah' it will also deliver 'delete:Delete' as surplus parameters in POST.
You want to keep for a button the value attribute and button label between tags both the same ('Delete' on this case), since (as stated above) some browsers will display one and some display another as a button label.
Maybe you can use a helper function like this:
// events and args should be of type Array
function addMultipleListeners(element,events,handler,useCapture,args){
if (!(events instanceof Array)){
throw 'addMultipleListeners: '+
'please supply an array of eventstrings '+
'(like ["click","mouseover"])';
}
//create a wrapper to be able to use additional arguments
var handlerFn = function(e){
handler.apply(this, args && args instanceof Array ? args : []);
}
for (var i=0;i<events.length;i+=1){
element.addEventListener(events[i],handlerFn,useCapture);
}
}
function handler(e) {
// do things
};
// usage
addMultipleListeners(
document.getElementById('first'),
['touchstart','click'],
handler,
false);
[Edit nov. 2020] This answer is pretty old. The way I solve this nowadays is by using an actions
object where handlers are specified per event type, a data-attribute
for an element to indicate which action should be executed on it and one generic document wide handler method (so event delegation).
const firstElemHandler = (elem, evt) =>
elem.textContent = `You ${evt.type === "click" ? "clicked" : "touched"}!`;
const actions = {
click: {
firstElemHandler,
},
touchstart: {
firstElemHandler,
},
mouseover: {
firstElemHandler: elem => elem.textContent = "Now ... click me!",
outerHandling: elem => {
console.clear();
console.log(`Hi from outerHandling, handle time ${
new Date().toLocaleTimeString()}`);
},
}
};
Object.keys(actions).forEach(key => document.addEventListener(key, handle));
function handle(evt) {
const origin = evt.target.closest("[data-action]");
return origin &&
actions[evt.type] &&
actions[evt.type][origin.dataset.action] &&
actions[evt.type][origin.dataset.action](origin, evt) ||
true;
}
_x000D_
[data-action]:hover {
cursor: pointer;
}
_x000D_
<div data-action="outerHandling">
<div id="first" data-action="firstElemHandler">
<b>Hover, click or tap</b>
</div>
this is handled too (on mouse over)
</div>
_x000D_
I had similar issue where i had to save the contents of the dataframe to a csv file of name which i defined. df.write("csv").save("<my-path>")
was creating directory than file. So have to come up with the following solutions.
Most of the code is taken from the following dataframe-to-csv with little modifications to the logic.
def saveDfToCsv(df: DataFrame, tsvOutput: String, sep: String = ",", header: Boolean = false): Unit = {
val tmpParquetDir = "Posts.tmp.parquet"
df.repartition(1).write.
format("com.databricks.spark.csv").
option("header", header.toString).
option("delimiter", sep).
save(tmpParquetDir)
val dir = new File(tmpParquetDir)
val newFileRgex = tmpParquetDir + File.separatorChar + ".part-00000.*.csv"
val tmpTsfFile = dir.listFiles.filter(_.toPath.toString.matches(newFileRgex))(0).toString
(new File(tmpTsvFile)).renameTo(new File(tsvOutput))
dir.listFiles.foreach( f => f.delete )
dir.delete
}
JDK 1.8 have some more enrich feature which doesn't support to many eclipse .
If you didn't find java compliance level as 1.8 in java compiler ,then go ahead and install the below eclipse 32bit or 64 bit depending on your system supports.
Try running one java program supports to java 8 like lambda expression as below and if no compilation error ,means your eclipse supports to java 1.8, something like this:
interface testI{
void show();
}
/*class A implements testI{
public void show(){
System.out.println("Hello");
}
}*/
public class LambdaDemo1 {
public static void main(String[] args) {
testI test ;
/*test= new A();
test.show();*/
test = () ->System.out.println("Hello,how are you?"); //lambda
test.show();
}
}
class Dog(object):
# Class Object Attribute
species = 'mammal'
def __init__(self,breed,name):
self.breed = breed
self.name = name
In above example we use species as a global since it will be always same(Kind of constant you can say). when you call __init__
method then all the variable inside __init__
will be initiated(eg:breed,name).
class Dog(object):
a = '12'
def __init__(self,breed,name,a):
self.breed = breed
self.name = name
self.a= a
if you print the above example by calling below like this
Dog.a
12
Dog('Lab','Sam','10')
Dog.a
10
That means it will be only initialized during object creation. so anything which you want to declare as constant make it as global and anything which changes use __init__
I required only one instance of the vertical padding, so I inserted this line in the appropriate place to avoid adding more to the css. <div style="margin-top:5px"></div>
Elaborating a bit more on Taylor Gautier's reply (sorry, I dont have enough reputation to add a comment), I'd reply to Dean Richardson on how to do what he wanted, without any additional JS code. Pure CSS.
You would replace his .btn
with the following:
<a class="btn showdetails" data-toggle="collapse" data-target="#viewdetails"></a>
And add a small CSS for when the content is displayed:
.in.collapse+a.btn.showdetails:before {
content:'Hide details «';
}
.collapse+a.btn.showdetails:before {
content:'Show details »';
}
Get rid of the change event, and instead change the value of the textbox in the click event. Rather than returning the result of the confirm, catch it in a var. If its true, change the value. Then return the var.
JUnit 5 (Jupiter) provides three functions to check exception absence/presence:
assertAll?()
Asserts that all supplied executables
do not throw exceptions.
assertDoesNotThrow?()
Asserts that execution of the
supplied executable
/supplier
does not throw any kind of exception.
This function is available
since JUnit 5.2.0 (29 April 2018).
assertThrows?()
Asserts that execution of the supplied executable
throws an exception of the expectedType
and returns the exception.
package test.mycompany.myapp.mymodule;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
class MyClassTest {
@Test
void when_string_has_been_constructed_then_myFunction_does_not_throw() {
String myString = "this string has been constructed";
assertAll(() -> MyClass.myFunction(myString));
}
@Test
void when_string_has_been_constructed_then_myFunction_does_not_throw__junit_v520() {
String myString = "this string has been constructed";
assertDoesNotThrow(() -> MyClass.myFunction(myString));
}
@Test
void when_string_is_null_then_myFunction_throws_IllegalArgumentException() {
String myString = null;
assertThrows(
IllegalArgumentException.class,
() -> MyClass.myFunction(myString));
}
}
Variable scope in Ruby is controlled by sigils to some degree. Variables starting with $
are global, variables with @
are instance variables, @@
means class variables, and names starting with a capital letter are constants. All other variables are locals. When you open a class or method, that's a new scope, and locals available in the previous scope aren't available.
I generally prefer to avoid creating global variables. There are two techniques that generally achieve the same purpose that I consider cleaner:
Create a constant in a module. So in this case, you would put all the classes that need the offset in the module Foo
and create a constant Offset
, so then all the classes could access Foo::Offset
.
Define a method to access the value. You can define the method globally, but again, I think it's better to encapsulate it in a module or class. This way the data is available where you need it and you can even alter it if you need to, but the structure of your program and the ownership of the data will be clearer. This is more in line with OO design principles.
Try this:
import os
for top, dirs, files in os.walk('./'):
for nm in files:
print os.path.join(top, nm)
For those like me who want to unload all modules (when running in the Python interpreter under Emacs):
for mod in sys.modules.values():
reload(mod)
More information is in Reloading Python modules.
The real problem is how Netbeans JARs its projects. The "Class-Path:" in the Manifest file is unnecessary when actually publishing your program for others to use. If you have an external Library added in Netbeans it acts as a package. I suggest you use a program like WINRAR to view the files within the jar and add your libraries as packages directly into the jar file.
How the inside of the jar file should look:
MyProject.jar
Manifest.MF
Main-Class: mainClassFolder.Mainclass
mainClassFolder
Mainclass.class
packageFolder
IamUselessWithoutMain.class
The question is old and the technology has advanced, here is the current state:
JSON Web Token (JWT) is a JSON-based open standard (RFC 7519) for passing claims between parties in web application environment. The tokens are designed to be compact, URL-safe and usable especially in web browser single sign-on (SSO) context.
One option could be to use vec_count()
function from the vctrs
library:
vec_count(numbers)
key count
1 435 3
2 67 2
3 4 2
4 34 2
5 56 2
6 23 2
7 456 1
8 43 1
9 453 1
10 5 1
11 657 1
12 324 1
13 54 1
14 567 1
15 65 1
The default ordering puts the most frequent values at top. If looking for sorting according keys (a table()
-like output):
vec_count(numbers, sort = "key")
key count
1 4 2
2 5 1
3 23 2
4 34 2
5 43 1
6 54 1
7 56 2
8 65 1
9 67 2
10 324 1
11 435 3
12 453 1
13 456 1
14 567 1
15 657 1
Just add:
import os
in the beginning, before:
from settings import PROJECT_ROOT
This will import the python's module os, which apparently is used later in the code of your module without being imported.
It appears to me that you have two issues here. One is that JFrame does not have a close
method, which has been addressed in the other answers.
The other is that you're having trouble referencing your JFrame. Within actionPerformed
, super
refers to ActionListener. To refer to the JFrame instance there, use MyExtendedJFrame.super
instead (you should also be able to use MyExtendedJFrame.this
, as I see no reason why you'd want to override the behaviour of dispose
or setVisible
).
You do this by adding a usage key to your app’s Info.plist together with a purpose string. NSCameraUsageDescription Specifies the reason for your app to access the device’s camera
You need to do:
import sqlitedbx
def main():
db = sqlitedbx.SqliteDBzz()
db.connect()
if __name__ == "__main__":
main()
There's a much easier way of doing this. You can assign a Name to your Window or UserControl, and then binding by ElementName.
Window1.xaml
<Window x:Class="QuizBee.Host.Window1"
x:Name="Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ListView ItemsSource="{Binding ElementName=Window1, Path=myDictionary}" />
</Window>
Window1.xaml.cs
public partial class Window1:Window
{
// the property must be public, and it must have a getter & setter
public Dictionary<string, myClass> myDictionary { get; set; }
public Window1()
{
// define the dictionary items in the constructor
// do the defining BEFORE the InitializeComponent();
myDictionary = new Dictionary<string, myClass>()
{
{"item 1", new myClass(1)},
{"item 2", new myClass(2)},
{"item 3", new myClass(3)},
{"item 4", new myClass(4)},
{"item 5", new myClass(5)},
};
InitializeComponent();
}
}
I'm using an MVC / MVA design pattern, with multiple types of "views". One type is a "GuiView", which is a Tk window. I pass a view reference to my window object which does things like link buttons back to view functions (which the adapter / controller class also calls).
In order to do that, the view object constructor needed to be completed prior to creating the window object. After creating and displaying the window, I wanted to do some initial tasks with the view automatically. At first I tried doing them post mainloop(), but that didn't work because mainloop() blocked!
As such, I created the window object and used tk.update() to draw it. Then, I kicked off my initial tasks, and finally started the mainloop.
import Tkinter as tk
class Window(tk.Frame):
def __init__(self, master=None, view=None ):
tk.Frame.__init__( self, master )
self.view_ = view
""" Setup window linking it to the view... """
class GuiView( MyViewSuperClass ):
def open( self ):
self.tkRoot_ = tk.Tk()
self.window_ = Window( master=None, view=self )
self.window_.pack()
self.refresh()
self.onOpen()
self.tkRoot_.mainloop()
def onOpen( self ):
""" Do some initial tasks... """
def refresh( self ):
self.tkRoot_.update()
Class is used for multiple elements which have common attributes.Example if you want same color and font for both p and body tag use class attribute or in a division itself.
Id on the other hand is used for highlighting a single element attributes and used exclusively for a particular element only.For example we have an h1 tag with some attributes we would not want them to repeat in any other elements throughout the page.
It should be noted that if we use class and id both in an element,*id ovverides the class attributes.*Simply because id is exclusively for a single element
Refer the below example
<html>
<head>
<style>
#html_id{
color:aqua;
background-color: black;
}
.html_class{
color:burlywood;
background-color: brown;
}
</style>
</head>
<body>
<p class="html_class">Lorem ipsum dolor sit amet consectetur adipisicing
elit.
Perspiciatis a dicta qui unde veritatis cupiditate ullam quibusdam!
Mollitia enim,
nulla totam deserunt ex nihil quod, eaque, sed facilis quos iste.</p>
</body>
</html>
We generate the output
You can (in version 5+) use the fromObject and fromString constructor parameters when creating HttpParamaters to make things a bit easier
const params = new HttpParams({
fromObject: {
param1: 'value1',
param2: 'value2',
}
});
// http://localhost:3000/test?param1=value1¶m2=value2
or:
const params = new HttpParams({
fromString: `param1=${var1}¶m2=${var2}`
});
//http://localhost:3000/test?paramvalue1=1¶m2=value2
I've also had this error when trying to pull the changes into a branch which is not created from the upstream branch from which I'm trying to pull.
Eg - This creates a new branch matching night-version
of upstream
git checkout upstream/night-version -b testnightversion
This creates a branch testmaster
in local which matches the master
branch of upstream.
git checkout upstream/master -b testmaster
Now if I try to pull the changes of night-version
into testmaster
branch leads to this error.
git pull upstream night-version //while I'm in `master` cloned branch
I managed to solve this by navigating to proper branch and pull the changes.
git checkout testnightversion
git pull upstream night-version // works fine.
Use
if (WIN32)
#do something
endif (WIN32)
or
if (UNIX)
#do something
endif (UNIX)
or
if (MSVC)
#do something
endif (MSVC)
or similar
You probably need to update your pg_hba.conf
file. This file controls what users can log in from what IP addresses. I think that the postgres user is pretty locked-down by default.
string sourceDir = @"c:\current";
string backupDir = @"c:\archives\2008";
try
{
string[] picList = Directory.GetFiles(sourceDir, "*.jpg");
string[] txtList = Directory.GetFiles(sourceDir, "*.txt");
// Copy picture files.
foreach (string f in picList)
{
// Remove path from the file name.
string fName = f.Substring(sourceDir.Length + 1);
// Use the Path.Combine method to safely append the file name to the path.
// Will overwrite if the destination file already exists.
File.Copy(Path.Combine(sourceDir, fName), Path.Combine(backupDir, fName), true);
}
// Copy text files.
foreach (string f in txtList)
{
// Remove path from the file name.
string fName = f.Substring(sourceDir.Length + 1);
try
{
// Will not overwrite if the destination file already exists.
File.Copy(Path.Combine(sourceDir, fName), Path.Combine(backupDir, fName));
}
// Catch exception if the file was already copied.
catch (IOException copyError)
{
Console.WriteLine(copyError.Message);
}
}
// Delete source files that were copied.
foreach (string f in txtList)
{
File.Delete(f);
}
foreach (string f in picList)
{
File.Delete(f);
}
}
catch (DirectoryNotFoundException dirNotFound)
{
Console.WriteLine(dirNotFound.Message);
}
The problem is that '_' underscores are not valid in header attribute. If removing the underscore is not an option you can add to the server block:
underscores_in_headers on;
This is basically a copy and paste from @kishorer747 comment on @Fleshgrinder answer, and solution is from: https://serverfault.com/questions/586970/nginx-is-not-forwarding-a-header-value-when-using-proxy-pass/586997#586997
I added it here as in my case the application behind nginx was working perfectly fine, but as soon ngix was between my flask app and the client, my flask app would not see the headers any longer. It was kind of time consuming to debug.
Try this:
If (($x !~ /\D/) && ($x ne "")) { ... }
Late to the game, but I found this method is extremely intuitive. https://codepen.io/adamchenwei/pen/BRNxJr
CSS
.imageContainer {
border: 1px black solid;
width: 450px;
height: 200px;
overflow: hidden;
}
.imageHolder {
border: 1px red dotted;
height: 100%;
display:flex;
align-items: center;
}
.imageItself {
height: auto;
width: 100%;
align-self: center;
}
HTML
<div class="imageContainer">
<div class="imageHolder">
<img class="imageItself" src="http://www.fiorieconfetti.com/sites/default/files/styles/product_thumbnail__300x360_/public/fiore_viola%20-%202.jpg" />
</div>
</div>
Select
CASE
WHEN listing.OfferText is null or listing.OfferText = '' THEN company.OfferText
ELSE COALESCE(Company.OfferText, '')
END As Offer_Text,
from tbl_directorylisting listing
Inner Join tbl_companymaster company
On listing.company_id= company.company_id
Tim Stone's solution is on the right track, but his initial rewriterule and and his cookie name in the final condition are different, and you can not write and read a cookie in the same request.
Here is the finalized working code:
RewriteEngine on
RewriteBase /
# Check if this is the noredirect query string
RewriteCond %{QUERY_STRING} (^|&)m=0(&|$)
# Set a cookie, and skip the next rule
RewriteRule ^ - [CO=mredir:0:www.website.com]
# Check if this looks like a mobile device
# (You could add another [OR] to the second one and add in what you
# had to check, but I believe most mobile devices should send at
# least one of these headers)
RewriteCond %{HTTP:x-wap-profile} !^$ [OR]
RewriteCond %{HTTP:Profile} !^$ [OR]
RewriteCond %{HTTP_USER_AGENT} "acs|alav|alca|amoi|audi|aste|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "dang|doco|eric|hipt|inno|ipaq|java|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|opwv" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "palm|pana|pant|pdxg|phil|play|pluc|port|prox|qtek|qwap|sage|sams|sany" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|w3cs|wap-|wapa|wapi" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "wapp|wapr|webc|winw|winw|xda|xda-" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "up.browser|up.link|windowssce|iemobile|mini|mmp" [NC,OR]
RewriteCond %{HTTP_USER_AGENT} "symbian|midp|wap|phone|pocket|mobile|pda|psp" [NC]
RewriteCond %{HTTP_USER_AGENT} !macintosh [NC]
# Check if we're not already on the mobile site
RewriteCond %{HTTP_HOST} !^m\.
# Can not read and write cookie in same request, must duplicate condition
RewriteCond %{QUERY_STRING} !(^|&)m=0(&|$)
# Check to make sure we haven't set the cookie before
RewriteCond %{HTTP_COOKIE} !^.*mredir=0.*$ [NC]
# Now redirect to the mobile site
RewriteRule ^ http://m.website.com [R,L]
It depends where you put this initialisation.
If the array is static as in
char array[100] = {0};
int main(void)
{
...
}
then it is the compiler that reserves the 100 0 bytes in the data segement of the program. In this case you could have omitted the initialiser.
If your array is auto, then it is another story.
int foo(void)
{
char array[100] = {0};
...
}
In this case at every call of the function foo you will have a hidden memset.
The code above is equivalent to
int foo(void)
{
char array[100];
memset(array, 0, sizeof(array));
....
}
and if you omit the initializer your array will contain random data (the data of the stack).
If your local array is declared static like in
int foo(void)
{
static char array[100] = {0};
...
}
then it is technically the same case as the first one.
This one will calculate a HashCode for each object, optimized for string
, number
and virtually anything that has a getHashCode
function. For the rest it assigns a new reference number.
(function() {
var __gRefID = 0;
window.getHashCode = function(ref)
{
if (ref == null) { throw Error("Unable to calculate HashCode on a null reference"); }
// already cached reference id
if (ref.hasOwnProperty("__refID")) { return ref["__refID"]; }
// numbers are already hashcodes
if (typeof ref === "number") { return ref; }
// strings are immutable, so we need to calculate this every time
if (typeof ref === "string")
{
var hash = 0, i, chr;
for (i = 0; i < ref.length; i++) {
chr = ref.charCodeAt(i);
hash = ((hash << 5) - hash) + chr;
hash |= 0;
}
return hash;
}
// virtual call
if (typeof ref.getHashCode === "function") { return ref.getHashCode(); }
// generate and return a new reference id
return (ref["__refID"] = "ref" + __gRefID++);
}
})();
Yes you can. In c++, class and struct are kind of similar. We can define not only structure inside a class, but also a class inside one. It is called inner class.
As an example I am adding a simple Trie class.
class Trie {
private:
struct node{
node* alp[26];
bool isend;
};
node* root;
node* createNode(){
node* newnode=new node();
for(int i=0; i<26; i++){
newnode->alp[i]=nullptr;
}
newnode->isend=false;
return newnode;
}
public:
/** Initialize your data structure here. */
Trie() {
root=createNode();
}
/** Inserts a word into the trie. */
void insert(string word) {
node* head=root;
for(int i=0; i<word.length(); i++){
if(head->alp[int(word[i]-'a')]==nullptr){
node* newnode=createNode();
head->alp[int(word[i]-'a')]=newnode;
}
head=head->alp[int(word[i]-'a')];
}
head->isend=true;
}
/** Returns if the word is in the trie. */
bool search(string word) {
node* head=root;
for(int i=0; i<word.length(); i++){
if(head->alp[int(word[i]-'a')]==nullptr){
return false;
}
head=head->alp[int(word[i]-'a')];
}
if(head->isend){return true;}
return false;
}
/** Returns if there is any word in the trie that starts with the given prefix. */
bool startsWith(string prefix) {
node* head=root;
for(int i=0; i<prefix.length(); i++){
if(head->alp[int(prefix[i]-'a')]==nullptr){
return false;
}
head=head->alp[int(prefix[i]-'a')];
}
return true;
}
};
/**
* Your Trie object will be instantiated and called as such:
* Trie* obj = new Trie();
* obj->insert(word);
* bool param_2 = obj->search(word);
* bool param_3 = obj->startsWith(prefix);
*/
There are four options here:
Get virtualenv
set up. Each virtual environment you create will automatically have pip
.
Learn how to install Python packages manually—in most cases it's as simple as download, unzip, python setup.py install
, but not always.
This worked for me:
dt.DefaultView.Sort = "Town ASC, Cutomer ASC";
dt = dt.DefaultView.ToTable();
This is because in line
graph(x**3+2*x-4, range(-10, 11))
x is not defined.
The easiest way is to pass the function you want to plot as a string and use eval
to evaluate it as an expression.
So your code with minimal modifications will be
import numpy as np
import matplotlib.pyplot as plt
def graph(formula, x_range):
x = np.array(x_range)
y = eval(formula)
plt.plot(x, y)
plt.show()
and you can call it as
graph('x**3+2*x-4', range(-10, 11))
If 'somescript.py' isn't something you could normally execute directly from the command line (I.e., $: somescript.py
works), then you can't call it directly using call.
Remember that the way Popen works is that the first argument is the program that it executes, and the rest are the arguments passed to that program. In this case, the program is actually python, not your script. So the following will work as you expect:
subprocess.call(['python', 'somescript.py', somescript_arg1, somescript_val1,...]).
This correctly calls the Python interpreter and tells it to execute your script with the given arguments.
Note that this is different from the above suggestion:
subprocess.call(['python somescript.py'])
That will try to execute the program called python somscript.py, which clearly doesn't exist.
call('python somescript.py', shell=True)
Will also work, but using strings as input to call is not cross platform, is dangerous if you aren't the one building the string, and should generally be avoided if at all possible.
You are checking Parent
properties for null in your delegate. The same should work with lambda expressions too.
List<AnalysisObject> analysisObjects = analysisObjectRepository
.FindAll()
.Where(x =>
(x.ID == packageId) ||
(x.Parent != null &&
(x.Parent.ID == packageId ||
(x.Parent.Parent != null && x.Parent.Parent.ID == packageId)))
.ToList();
you need to wrap your text inside div and float it left while wrapper div should have height, and I've also added line height for vertical alignment
<div style="border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: gray;height:30px;">
<div style="float:left;line-height:30px;">Contact Details</div>
<button type="button" class="edit_button" style="float: right;">My Button</button>
</div>
also js fiddle here =) http://jsfiddle.net/xQgSm/
As an alternative to the MONTH and YEAR functions, a regular WHERE clause will work too:
select *
from yourtable
where '2009-01-01' <= datecolumn and datecolumn < '2009-02-01'
Man, I had the issue in one of my eclipse projects, amazingly the issue was the order of the jars in my .project file. believe it or not!
Technically, no. But what you can do is use a font size that is as tall as you would like the stretched font to be, and then condense it horizontally with font-stretch
.
do from PIL import Image, ImageTk
you can find the user in DBA_USERS table like
SELECT profile
FROM dba_users
WHERE username = 'MacsP'
Now go to the sys/system (administrator) and use query
ALTER USER PRATEEK
IDENTIFIED BY "new_password"
REPLACE "old_password"
To verify the account status just go through
SELECT * FROM DBA_USERS.
and you can see status of your user.
async() => {
let body = await model.find().or([
{ name: 'something'},
{ nickname: 'somethang'}
]).exec();
console.log(body);
}
/* Gives an array of the searched query!
returns [] if not found */
This works fine for me:
while True:
answer = input('Do you want to continue?:')
if answer.lower().startswith("y"):
print("ok, carry on then")
elif answer.lower().startswith("n"):
print("sayonara, Robocop")
exit()
edit: use input
in python 3.2 instead of raw_input
try changing this part,
<input type="checkbox" name="newsletter[]" value="newsletter" checked>i want to sign up for newsletter
for this
<input type="checkbox" name="newsletter" value="newsletter" checked>i want to sign up for newsletter
you should use UNSIGNED ZEROFILL
in your table structure.
var top = ($(".apps_intro_wrapper_inner").offset() || { "top": NaN }).top;
if (!isNaN(top)) {
$("#app_scroler").click(function () {
$('html, body').animate({
scrollTop: top
}, 100);
});
}
if you want to scroll a little above or below from specific div that add value to the top like this.....like I add 800
var top = ($(".apps_intro_wrapper_inner").offset() || { "top": NaN }).top + 800;
Its called Longest Common Substring problem. Here I present a simple, easy to understand but inefficient solution. It will take a long time to produce correct output for large strings, as the complexity of this algorithm is O(N^2).
def longestSubstringFinder(string1, string2):
answer = ""
len1, len2 = len(string1), len(string2)
for i in range(len1):
match = ""
for j in range(len2):
if (i + j < len1 and string1[i + j] == string2[j]):
match += string2[j]
else:
if (len(match) > len(answer)): answer = match
match = ""
return answer
print longestSubstringFinder("apple pie available", "apple pies")
print longestSubstringFinder("apples", "appleses")
print longestSubstringFinder("bapples", "cappleses")
Output
apple pie
apples
apples
publish date: 06/26/2018
https://docs.microsoft.com/en-us/dotnet/framework/network-programming/how-to-upload-files-with-ftp
using System;
using System.IO;
using System.Net;
using System.Text;
namespace Examples.System.Net
{
public class WebRequestGetExample
{
public static void Main ()
{
// Get the object used to communicate with the server.
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create("ftp://www.contoso.com/test.htm");
request.Method = WebRequestMethods.Ftp.UploadFile;
// This example assumes the FTP site uses anonymous logon.
request.Credentials = new NetworkCredential("anonymous",
"[email protected]");
// Copy the contents of the file to the request stream.
byte[] fileContents;
using (StreamReader sourceStream = new StreamReader("testfile.txt"))
{
fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
}
request.ContentLength = fileContents.Length;
using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(fileContents, 0, fileContents.Length);
}
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
Console.WriteLine($"Upload File Complete, status
{response.StatusDescription}");
}
}
}
}
Deleting a lot of rows can be very slow. Try to delete a few at a time, like:
delete top (10) YourTable where col in ('1','2','3','4')
while @@rowcount > 0
begin
delete top (10) YourTable where col in ('1','2','3','4')
end
you can simply use JSON.stringify(options) convert JSON object to string before submit, then warning dismiss and works fine
Take a look at the answers provided for this question: Invalid value for size_t?. Also you can use std::find_if with std::distance to get the index.
std::vector<type>::iterator iter = std::find_if(vec.begin(), vec.end(), comparisonFunc);
size_t index = std::distance(vec.begin(), iter);
if(index == vec.size())
{
//invalid
}
The following, with an additional dot before the index, works just as expected. Here, the square brackets are optional when the index is followed by another property:
{{people.[1].name}}
{{people.1.name}}
However, the square brackets are required in:
{{#with people.[1]}}
{{name}}
{{/with}}
In the latter, using the index number without the square brackets would get one:
Error: Parse error on line ...:
... {{#with people.1}}
-----------------------^
Expecting 'ID', got 'INTEGER'
As an aside: the brackets are (also) used for segment-literal syntax, to refer to actual identifiers (not index numbers) that would otherwise be invalid. More details in What is a valid identifier?
(Tested with Handlebars in YUI.)
You can now use the get
helper for this:
(get people index)
although if you get an error about index needing to be a string, do:
(get people (concat index ""))
setTimeout will help you to execute any JavaScript code based on the time you set.
Syntax
setTimeout(code, millisec, lang)
Usage,
setTimeout("function1()", 1000);
For more details, see http://www.w3schools.com/jsref/met_win_settimeout.asp
Once you know the hash of the stash commit you dropped, you can apply it as a stash:
git stash apply $stash_hash
Or, you can create a separate branch for it with
git branch recovered $stash_hash
After that, you can do whatever you want with all the normal tools. When you’re done, just blow the branch away.
If you have only just popped it and the terminal is still open, you will still have the hash value printed by git stash pop
on screen (thanks, Dolda).
Otherwise, you can find it using this for Linux, Unix or Git Bash for Windows:
git fsck --no-reflog | awk '/dangling commit/ {print $3}'
...or using Powershell for Windows:
git fsck --no-reflog | select-string 'dangling commit' | foreach { $_.ToString().Split(" ")[2] }
This will show you all the commits at the tips of your commit graph which are no longer referenced from any branch or tag – every lost commit, including every stash commit you’ve ever created, will be somewhere in that graph.
The easiest way to find the stash commit you want is probably to pass that list to gitk
:
gitk --all $( git fsck --no-reflog | awk '/dangling commit/ {print $3}' )
...or see the answer from emragins if using Powershell for Windows.
This will launch a repository browser showing you every single commit in the repository ever, regardless of whether it is reachable or not.
You can replace gitk
there with something like git log --graph --oneline --decorate
if you prefer a nice graph on the console over a separate GUI app.
To spot stash commits, look for commit messages of this form:
WIP on somebranch: commithash Some old commit message
Note: The commit message will only be in this form (starting with "WIP on") if you did not supply a message when you did git stash
.
Java code:
// Converts 14 dip into its equivalent px
float dip = 14f;
Resources r = getResources();
float px = TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dip,
r.getDisplayMetrics()
);
Kotlin code:
val dip = 14f
val r: Resources = resources
val px = TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dip,
r.displayMetrics
)
Use fragments from Support Library -
android.support.v4.app.Fragment
and then override
void onAttach (Context context) {
this.context = context;
}
This way you can be sure that context will always be a non-null value.
Sweet and simple:
Invalidate Caches/ Restart and then Build -> Rebuild Project helped for me
Is m_cRedundencyManager
able to use member functions? Most callbacks are set up to use regular functions or static member functions. Take a look at this page at C++ FAQ Lite for more information.
Update: The function declaration you provided shows that m_cRedundencyManager
is expecting a function of the form: void yourCallbackFunction(int, void *)
. Member functions are therefore unacceptable as callbacks in this case. A static member function may work, but if that is unacceptable in your case, the following code would also work. Note that it uses an evil cast from void *
.
// in your CLoggersInfra constructor:
m_cRedundencyManager->Init(myRedundencyManagerCallBackHandler, this);
// in your CLoggersInfra header:
void myRedundencyManagerCallBackHandler(int i, void * CLoggersInfraPtr);
// in your CLoggersInfra source file:
void myRedundencyManagerCallBackHandler(int i, void * CLoggersInfraPtr)
{
((CLoggersInfra *)CLoggersInfraPtr)->RedundencyManagerCallBack(i);
}
Use:
SELECT *
FROM `table`
WHERE INSTR(`column`, '{$needle}') > 0
Reference:
This worked for me fine:
File 1:
<html>
<head></head>
<body>
<a href="#" onclick="window.open('file:///D:/Examples/file2.html'); return false">CLICK ME</a>
</body>
<footer></footer>
</html>
File 2:
<html>
...
</html>
This method works regardless of whether or not the 2 files are in the same directory, BUT both files must be local.
For obvious security reasons, if File 1 is located on a remote server you absolutely cannot open a file on some client's host computer and trying to do so will open a blank target.
It's not the same situation, but it also works for me and now I can use SWIG with Python3.5:
I was trying to compile:
gcc -fPIC -c existe.c existe_wrap.c -I /usr/include/python3.5m/
With Python 2.7 works fine, not with my version 3.5:
existe_wrap.c:147:21: fatal error: Python.h: No existe el archivo o el directorio compilation terminated.
After run in my Ubuntu 16.04 installation:
sudo apt-get install python3-dev # for python3.x installs
Now I can compile without problems Python3.5:
gcc -fPIC -c existe.c existe_wrap.c -I /usr/include/python3.5m/
If you really have to iterate a Pandas dataframe, you will probably want to avoid using iterrows(). There are different methods and the usual iterrows()
is far from being the best. itertuples() can be 100 times faster.
In short:
df.itertuples(name=None)
. In particular, when you have a fixed number columns and less than 255 columns. See point (3)df.itertuples()
except if your columns have special characters such as spaces or '-'. See point (2)itertuples()
even if your dataframe has strange columns by using the last example. See point (4)iterrows()
if you cannot the previous solutions. See point (1)Generate a random dataframe with a million rows and 4 columns:
df = pd.DataFrame(np.random.randint(0, 100, size=(1000000, 4)), columns=list('ABCD'))
print(df)
1) The usual iterrows()
is convenient, but damn slow:
start_time = time.clock()
result = 0
for _, row in df.iterrows():
result += max(row['B'], row['C'])
total_elapsed_time = round(time.clock() - start_time, 2)
print("1. Iterrows done in {} seconds, result = {}".format(total_elapsed_time, result))
2) The default itertuples()
is already much faster, but it doesn't work with column names such as My Col-Name is very Strange
(you should avoid this method if your columns are repeated or if a column name cannot be simply converted to a Python variable name).:
start_time = time.clock()
result = 0
for row in df.itertuples(index=False):
result += max(row.B, row.C)
total_elapsed_time = round(time.clock() - start_time, 2)
print("2. Named Itertuples done in {} seconds, result = {}".format(total_elapsed_time, result))
3) The default itertuples()
using name=None is even faster but not really convenient as you have to define a variable per column.
start_time = time.clock()
result = 0
for(_, col1, col2, col3, col4) in df.itertuples(name=None):
result += max(col2, col3)
total_elapsed_time = round(time.clock() - start_time, 2)
print("3. Itertuples done in {} seconds, result = {}".format(total_elapsed_time, result))
4) Finally, the named itertuples()
is slower than the previous point, but you do not have to define a variable per column and it works with column names such as My Col-Name is very Strange
.
start_time = time.clock()
result = 0
for row in df.itertuples(index=False):
result += max(row[df.columns.get_loc('B')], row[df.columns.get_loc('C')])
total_elapsed_time = round(time.clock() - start_time, 2)
print("4. Polyvalent Itertuples working even with special characters in the column name done in {} seconds, result = {}".format(total_elapsed_time, result))
Output:
A B C D
0 41 63 42 23
1 54 9 24 65
2 15 34 10 9
3 39 94 82 97
4 4 88 79 54
... .. .. .. ..
999995 48 27 4 25
999996 16 51 34 28
999997 1 39 61 14
999998 66 51 27 70
999999 51 53 47 99
[1000000 rows x 4 columns]
1. Iterrows done in 104.96 seconds, result = 66151519
2. Named Itertuples done in 1.26 seconds, result = 66151519
3. Itertuples done in 0.94 seconds, result = 66151519
4. Polyvalent Itertuples working even with special characters in the column name done in 2.94 seconds, result = 66151519
This article is a very interesting comparison between iterrows and itertuples
Had the same issue on windows XP. Resolved. The error was caused due to the system log being full. Control Panel -> Administrative Tools -> Event viewer Right click on application log, clear all events, optionaly save the log. Same process for system log. Restart and it should work.
1) Are you sure mod_rewrite module is enabled? Check phpinfo()
2) Your above rule assumes the URL starts with "folder". Is this correct? Did you acutally want to have folder in the URL? This would match a URL like:
/folder/thing -> /folder/thing.php
If you actually want
/thing -> /folder/thing.php
You need to drop the folder from the match expression.
I usually use this to route request to page without php (but yours should work which leads me to think that mod_rewrite may not be enabled):
RewriteRule ^([^/\.]+)/?$ $1.php [L,QSA]
3) Assuming you are declaring your rules in an .htaccess file, does your installation allow for setting Options (AllowOverride) overrides in .htaccess files? Some shared hosts do not.
When the server finds an .htaccess file (as specified by AccessFileName) it needs to know which directives declared in that file can override earlier access information.
from django.utils import simplejson
from django.core import serializers
def pagina_json(request):
misdatos = misdatos.objects.all()
data = serializers.serialize('json', misdatos)
return HttpResponse(data, mimetype='application/json')
If your are looking for iOS 8 and above, the simplest way to do it is to set the var layoutMargins: UIEdgeInsets { get set }
of your map view before calling func showAnnotations(annotations: [MKAnnotation], animated: Bool)
For instance (Swift 2.1):
@IBOutlet weak var map: MKMapView! {
didSet {
map.delegate = self
map.mapType = .Standard
map.pitchEnabled = false
map.rotateEnabled = false
map.scrollEnabled = true
map.zoomEnabled = true
}
}
// call 'updateView()' when viewWillAppear or whenever you set the map annotations
func updateView() {
map.layoutMargins = UIEdgeInsets(top: 25, left: 25, bottom: 25, right: 25)
map.showAnnotations(map.annotations, animated: true)
}
Use the std::getline()
from <string>
.
istream & getline(istream & is,std::string& str)
So, for your case it would be:
std::getline(read,x);
if you're submitting to the same page where the form is you could write the form tags with out an action and it will submit, like this
<form method='post'> <!-- you can see there is no action here-->
Use a static AutoResetEvent in your spawned threads to call back to the main thread using the Set() method. This guy has a fairly good demo in SO on how to use it.
XmlNodes come with an OwnerDocument property.
Perhaps you can just do:
//Node is an XmlNode pulled from an XmlDocument
XmlElement e = node.OwnerDocument.CreateElement("MyNewElement");
e.InnerText = "Some value";
node.AppendChild(e);
It can convert by
Convert.ToInt32 method
But it will throw an OverflowException if it the value is outside range of the Int32 Type. A basic test will show us how it works:
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
int result;
foreach (long number in numbers)
{
try {
result = Convert.ToInt32(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the Int32 type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the Int32 type.
// Converted the Int64 value -1 to the Int32 value -1.
// Converted the Int64 value 0 to the Int32 value 0.
// Converted the Int64 value 121 to the Int32 value 121.
// Converted the Int64 value 340 to the Int32 value 340.
// The Int64 value 9223372036854775807 is outside the range of the Int32 type.
Here there is a longer explanation.
If the text you're putting in the TextView
is short, it will not automatically expand to four lines. If you want the TextView
to always have four lines regardless of the length of the text in it, set the android:lines
attribute:
<TextView
android:id="@+id/address1"
android:gravity="left"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:maxLines="4"
android:lines="4"
android:text="Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."></TextView>
You can do this with TableRow, see below code
<TableRow >
<TextView
android:id="@+id/tv_description_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:padding="8dp"
android:text="@string/rating_review"
android:textColor="@color/black"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:maxLines="4"`enter code here`
android:padding="8dp"
android:text="The food test was very good."
android:textColor="@color/black"
android:textColorHint="@color/hint_text_color" />
</TableRow>
If you are an analyst and not a full stack guy, this might be more intuitive:
[(str('00000') + str(i))[-5:] for i in arange(100)]
breaking that down, you:
start by creating a list that repeats 0's or X's, in this case, 100 long, i.e., arange(100)
add the numbers you want to the string, in this case, numbers 0-99, i.e., 'i'
keep only the right hand 5 digits, i.e., '[-5:]' for subsetting
output is numbered list, all with 5 digits
One main difference is the Local
part of LocalDateTime
. If you live in Germany and create a LocalDateTime
instance and someone else lives in USA and creates another instance at the very same moment (provided the clocks are properly set) - the value of those objects would actually be different. This does not apply to Instant
, which is calculated independently from time zone.
LocalDateTime
stores date and time without timezone, but it's initial value is timezone dependent. Instant
's is not.
Moreover, LocalDateTime
provides methods for manipulating date components like days, hours, months. An Instant
does not.
apart from the nanosecond precision advantage of Instant and the time-zone part of LocalDateTime
Both classes have the same precision. LocalDateTime
does not store timezone. Read javadocs thoroughly, because you may make a big mistake with such invalid assumptions: Instant and LocalDateTime.
Addition to the answer of Brett DeWoody: (which is updated now)
var dataValue = obj.srcElement.attributes.data.nodeValue;
Works fine in IE(9+) and Chrome, but Firefox does not know the srcElement property. I found:
var dataValue = obj.currentTarget.attributes.data.nodeValue;
Works in IE, Chrome and FF, I did not test Safari.
JPA provider can set it for you - incase if someone doesn't want to control through JPA properties
public static JpaProperties properties() {
final JpaProperties jpaProperties = new JpaProperties();
jpaProperties.setShowSql(true);
Although your question is about deleting elements from the array being iterated upon and not about removing elements (in addition to some other processing) efficiently, I think one should reconsider it if in similar situation.
The algorithmic complexity of this approach is O(n^2)
as splice function and the for loop both iterate over the array (splice function shifts all elements of array in the worst case). Instead you can just push the required elements to the new array and then just assign that array to the desired variable (which was just iterated upon).
var newArray = [];
for (var i = 0, len = Auction.auctions.length; i < len; i++) {
auction = Auction.auctions[i];
auction.seconds--;
if (!auction.seconds < 0) {
newArray.push(auction);
}
}
Auction.auctions = newArray;
Since ES2015 we can use Array.prototype.filter
to fit it all in one line:
Auction.auctions = Auction.auctions.filter(auction => --auction.seconds >= 0);
I tried everything to remove & from a JSON array. None of the above examples, but https://stackoverflow.com/users/2030321/chris gave a great solution that led me to fix my problem.
var stringtodecode="<B>Hello</B> world<br>";
document.getElementById("decodeIt").innerHTML=stringtodecode;
stringtodecode=document.getElementById("decodeIt").innerText
I did not use, because I did not understand how to insert it into a modal window that was pulling JSON data into an array, but I did try this based upon the example, and it worked:
var modal = document.getElementById('demodal');
$('#ampersandcontent').text(replaceAll(data[0],"&", "&"));
I like it because it was simple, and it works, but not sure why it's not widely used. Searched hi & low to find a simple solution. I continue to seek understanding of the syntax, and if there is any risk to using this. Have not found anything yet.
Use a PHP Excel for generatingExcel file. You can find a good one called PHPExcel here: https://github.com/PHPOffice/PHPExcel
And for PDF
generation use http://princexml.com/
In my experience, you usually want to do this, then 'protect' your files to do something fancy and then use the 'protected' files. If you have just one file you want to use like this, you can use the trick that's explained in the answer by Jeremy Thompson. However, if you attempt to do this on lots of files (say, for example when you're writing an installer), you're in for quite a bit of hurt.
A very elegant way this can be solved is by using the fact that your file system will not allow you to change a folder name if one of the files there it's being used. Keep the folder in the same file system and it'll work like a charm.
Do note that you should be aware of the obvious ways this can be exploited. After all, the files won't be locked. Also, be aware that there are other reasons that can result in your Move
operation to fail. Obviously proper error handling (MSDN) can help out here.
var originalFolder = @"c:\myHugeCollectionOfFiles"; // your folder name here
var someFolder = Path.Combine(originalFolder, "..", Guid.NewGuid().ToString("N"));
try
{
Directory.Move(originalFolder, someFolder);
// Use files
}
catch // TODO: proper exception handling
{
// Inform user, take action
}
finally
{
Directory.Move(someFolder, originalFolder);
}
For individual files I'd stick with the locking suggestion posted by Jeremy Thompson.
SVN is case-sensitive. Make sure that you're spelling it properly. If it got renamed, you can relocate the working folder to the new URL. See https://tortoisesvn.net/docs/release/TortoiseSVN_en/tsvn-dug-relocate.html
If you are using Carbon (and you should, it's awesome!) with Laravel, you can simply do the following:
->where('created_at', '>=', Carbon::today())
Besides now()
and today()
, you can also use yesterday()
and tomorrow()
and then use the following:
startOfDay()
/endOfDay()
startOfWeek()
/endOfWeek()
startOfMonth()
/endOfMonth()
startOfYear()
/endOfYear()
startOfDecade()
/endOfDecade()
startOfCentury()
/endOfCentury()
From GNU Make error appendix, as you see this is not a Make error but an error coming from gcc.
‘[foo] Error NN’ ‘[foo] signal description’ These errors are not really make errors at all. They mean that a program that make invoked as part of a recipe returned a non-0 error code (‘Error NN’), which make interprets as failure, or it exited in some other abnormal fashion (with a signal of some type). See Errors in Recipes. If no *** is attached to the message, then the subprocess failed but the rule in the makefile was prefixed with the - special character, so make ignored the error.
So in order to attack the problem, the error message from gcc is required. Paste the command in the Makefile directly to the command line and see what gcc says. For more details on Make errors click here.
Use header and redirect the page.
header("Location:your_page.php");
You can redirect to same page or different page.
Unset $_POST after inserting it to Database.
unset($_POST);
This works to take out the \n
(new line) off a item in a list
it just takes the first item in string off
def remove_end(s):
templist=[]
for i in s:
templist.append(i)
return(templist[0])
What kind of database user is it? Run select * from sys.database_principals
in the database and check columns type
and type_desc
for that name
. If it is a Windows or SQL user, go with @gbn's answer, but if it's something else (which is my untested guess based on your error message) then you have a different problem.
Edit
So it is a SQL-authenticated login. Back when we'd use sp_change_users_login
to fix such logins. SQL 2008 has it as "don't use, will be deprecated", which means that the ALTER USER command should be sufficient... but it might be worth a try in this case. Used properly (it's been a while), I believe this updates the SID of the User to match that of the login.
Fancy C# extension method based on previous answers:
public static IWebElement SetAttribute(this IWebElement element, string name, string value)
{
var driver = ((IWrapsDriver)element).WrappedDriver;
var jsExecutor = (IJavaScriptExecutor)driver;
jsExecutor.ExecuteScript("arguments[0].setAttribute(arguments[1], arguments[2]);", element, name, value);
return element;
}
Usage:
driver.FindElement(By.Id("some_option")).SetAttribute("selected", "selected");
For React.js, the following is what worked for me in the footer...
render() {
const yearNow = new Date().getFullYear();
return (
<div className="copyright">© Company 2015-{yearNow}</div>
);
}
Inside for-loops and iterator methods like each
and map
the next
keyword in ruby will have the effect of jumping to the next iteration of the loop (same as continue
in C).
However what it actually does is just to return from the current block. So you can use it with any method that takes a block - even if it has nothing to do with iteration.
I don't recommend encoding binary data in base64 and wrapping it in JSON. It will just needlessly increase the size of the response and slow things down.
Simply serve your file data using GET and application/octect-stream
using one of the factory methods of javax.ws.rs.core.Response
(part of the JAX-RS API, so you're not locked into Jersey):
@GET
@Produces(MediaType.APPLICATION_OCTET_STREAM)
public Response getFile() {
File file = ... // Initialize this to the File path you want to serve.
return Response.ok(file, MediaType.APPLICATION_OCTET_STREAM)
.header("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"" ) //optional
.build();
}
If you don't have an actual File
object, but an InputStream
, Response.ok(entity, mediaType)
should be able to handle that as well.
To style the output to your preferred pretty format, see the man page for git-log
.
Example:
git log --pretty=format:"%h; author: %cn; date: %ci; subject:%s" tagA...tagB
from python mailing lists: parsing millisecond thread. There is a function posted there that seems to get the job done, although as mentioned in the author's comments it is kind of a hack. It uses regular expressions to handle the exception that gets raised, and then does some calculations.
You could also try do the regular expressions and calculations up front, before passing it to strptime.
On macs chrome browser:
cmd-ctrl-f
Just repeat to undo or hover above top
cmd-shift-f
cmd-shift-f
undo hide cmd-ctrl-f
undo full screen Nesting block level elements in anchors is not invalid anymore in HTML5. See http://html5doctor.com/block-level-links-in-html-5/ and http://www.w3.org/TR/html5/the-a-element.html.
I'm not saying you should use it, but in HTML5 it's fine to use <a href="#"><div></div></a>
.
The accepted answer is otherwise the best one. Using JavaScript like others suggested is also bad because it would make the "link" inaccessible (to users without JavaScript, which includes search engines and others).
jQuery UI draggable and droppable are the two plugins I would use to achieve this effect. As for the insertion marker, I would investigate modifying the div
(or container) element that was about to have content dropped into it. It should be possible to modify the border in some way or add a JavaScript/jQuery listener that listens for the hover (element about to be dropped) event and modifies the border or adds an image of the insertion marker in the right place.
In case anyone else stumbles across this question, this is probably what you were looking for:
.grabbable {
cursor: move; /* fallback if grab cursor is unsupported */
cursor: grab;
cursor: -moz-grab;
cursor: -webkit-grab;
}
/* (Optional) Apply a "closed-hand" cursor during drag operation. */
.grabbable:active {
cursor: grabbing;
cursor: -moz-grabbing;
cursor: -webkit-grabbing;
}
You want grepl
:
> chars <- "test"
> value <- "es"
> grepl(value, chars)
[1] TRUE
> chars <- "test"
> value <- "et"
> grepl(value, chars)
[1] FALSE
Another good way of dealing with Lion's hidden scroll bars is to display a prompt to scroll down. It doesn't work with small scroll areas such as text fields but well with large scroll areas and keeps the overall style of the site. One site doing this is http://versusio.com, just check this example page and wait 1.5 seconds to see the prompt:
http://versusio.com/en/samsung-galaxy-nexus-32gb-vs-apple-iphone-4s-64gb
The implementation isn't hard but you have to take care, that you don't display the prompt when the user has already scrolled.
You need jQuery + Underscore and
$(window).scroll
to check if the user already scrolled by himself,
_.delay()
to trigger a delay before you display the prompt -- the prompt shouldn't be to obtrusive
$('#prompt_div').fadeIn('slow')
to fade in your prompt and of course
$('#prompt_div').fadeOut('slow')
to fade out when the user scrolled after he saw the prompt
In addition, you can bind Google Analytics events to track user's scrolling behavior.
SELECT * FROM
MY_TABLE
WHERE
<your filters>
ORDER BY PRIMARY_KEY DESC FETCH FIRST ROW ONLY
In my case, the auto-generated project appcompat_v7 was closed. So just open up that project in Package Explorer.
Hope this help.
For non-nested objects:
Object.entries(o).map(x=>x.join(":")).join("\r\n")
a short way (use floor and fmod)
$var = "1.25";
$whole = floor($var); // 1
$decimal = fmod($var, 1); //0.25
then compare $decimal to 0, .25, .5, or .75
There are well achieved third-party tools, but i usually use superfish http://www.conceptdevelopment.net/Fun/Superfish/ it's cool, free and easy ;)
I prefer another approach if you are using mongo
shell:
First as the another answers: use my_database_name
then:
db.getCollectionNames().map( (name) => ({[name]: db[name].find().toArray().length}) )
This query will show you something like this:
[
{
"agreements" : 60
},
{
"libraries" : 45
},
{
"templates" : 9
},
{
"users" : 19
}
]
You can use similar approach with db.getCollectionInfos()
it is pretty useful if you have so much data & helpful as well.
No Worries! I have found the solution! I just installed https://msdn.microsoft.com/en-us/windows/desktop/bg162891.aspx and it all worked fine :)
A much simpler solution would be to download the file using Chrome. In this manner you don't have to manually click on the save button.
using System;
using System.Diagnostics;
using System.ComponentModel;
namespace MyProcessSample
{
class MyProcess
{
public static void Main()
{
Process myProcess = new Process();
myProcess.Start("chrome.exe","http://www.com/newfile.zip");
}
}
}
You can use the append()
function to insert items into vectors or lists (dataframes are lists). Simply:
df <- data.frame(a=c(1,2), b=c(3,4), c=c(5,6))
df <- as.data.frame(append(df, list(d=df$b+df$c), after=2))
Or, if you want to specify the position by name use which
:
df <- as.data.frame(append(df, list(d=df$b+df$c), after=which(names(df)=="b")))
Under Linux and other UNIX systems, using the tar
command would do this easily.
$ tar cvf /tmp/full-structure.tar *data.zip *info.txt
Then you'd cwd to the target and:
$ tar xvf /tmp/full-structure.tar
Of course you could pipe the output from the first tar into the 2nd, but seeing it work in steps is easier to understand and explain. I'm missing the necessary cd /to/new/path/ in the following command - I just don't recall how to do it now. Someone else can add it, hopefully.
$ tar cvf - *data.zip *info.txt | tar xvf -
Tar (gnutar) is available on Windows too, but I'd probably use the xcopy
method myself on that platform.
The fastest and most semantically self explaining way to check for existence is actually by using plain JavaScript
:
if (document.getElementById('element_id')) {
// Do something
}
It is a bit longer to write than the jQuery length alternative, but executes faster since it is a native JS method.
And it is better than the alternative of writing your own jQuery
function. That alternative is slower, for the reasons @snover stated. But it would also give other programmers the impression that the exists()
function is something inherent to jQuery. JavaScript
would/should be understood by others editing your code, without increased knowledge debt.
NB: Notice the lack of an '#' before the element_id
(since this is plain JS, not jQuery
).
As of Visual Studio 2013, the word wrap feature is finally usable—it respects indentation. There's still a couple of issues (line highlighting, selection), but it's worth using. Here's how
In my case (Ubuntu 18.04), I ran this code in terminal:
sudo vim ~/.bashrc
and then edited SPARK_HOME
as follows:
export SPARK_HOME=/home/muser/programs/anaconda2019/lib/python3.7/site-packages/pyspark
export PATH=$PATH:$SPARK_HOME/bin:$SPARK_HOME/sbin
By doing so, my SPARK_HOME
will refer to the pyspark
package I installed in the site-package
.
To learn how to use vim
, go to this link.
Try this one. Just get the list of latest post dates from each author. Thats it
SELECT wp_posts.* FROM wp_posts WHERE wp_posts.post_status='publish'
AND wp_posts.post_type='post' AND wp_posts.post_date IN(SELECT MAX(wp_posts.post_date) FROM wp_posts GROUP BY wp_posts.post_author)
Use std::setprecision
:
std::cout << std::setprecision (15) << 3.14159265358979 << std::endl;
class Dad
{
protected static String me = "dad";
public void printMe()
{
System.out.println(me);
}
}
class Son extends Dad
{
protected static String _me = me = "son";
}
public void doIt()
{
new Son().printMe();
}
... will print "son".
I did exactly what you're looking for in a very simple way. It is perfectly smooth in Google Chrome and Opera, and almost perfect in Firefox and Safari. Not tested in IE.
function newTab(url)
{
var tab=window.open("");
tab.document.write("<!DOCTYPE html><html>"+document.getElementsByTagName("html")[0].innerHTML+"</html>");
tab.document.close();
window.location.href=url;
}
Fiddle : http://jsfiddle.net/tFCnA/show/
Explanations:
Let's say there is windows A1 and B1 and websites A2 and B2.
Instead of opening B2 in B1 and then return to A1, I open B2 in A1 and re-open A2 in B1.
(Another thing that makes it work is that I don't make the user re-download A2, see line 4)
The only thing you may doesn't like is that the new tab opens before the main page.
To assign value of a text box whose id is ?textbox? in jQuery please do the following
$("#textbox").val('Blah');
As has been said in other answers, the correct conversion specifier is "%Lf"
.
You might want to turn on the format warning by using -Wformat
(or -Wall
, which includes -Wformat
) in the gcc invocation
$ gcc source.c $ gcc -Wall source.c source.c: In function `main`: source.c:5: warning: format "%lf" expects type `double`, but argument 2 has type `long double` source.c:5: warning: format "%le" expects type `double`, but argument 3 has type `long double` $
You need to call finish()
from the UI thread, not a background thread. The way to do this is to declare a Handler and ask the Handler to run a Runnable on the UI thread. For example:
public class LoadingScreen extends Activity{
private LoadingScreen loadingScreen;
Intent i = new Intent(this, HomeScreen.class);
Handler handler;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
handler = new Handler();
setContentView(R.layout.loading);
CountDownTimer timer = new CountDownTimer(10000, 1000) //10seceonds Timer
{
@Override
public void onTick(long l)
{
}
@Override
public void onFinish()
{
handler.post(new Runnable() {
public void run() {
loadingScreen.finishActivity(0);
startActivity(i);
}
});
};
}.start();
}
}
Use:
<Button Height="100" Width="100">
<StackPanel>
<Image Source="img.jpg" />
<TextBlock Text="Blabla" />
</StackPanel>
</Button>
It should work. But remember that you must have an image added to the resource on your project!
You can set the DateTime to Nullable. By default DateTime is not nullable. You can make it nullable in a couple of ways. Using a question mark after the type DateTime? myTime or using the generic style Nullable.
DateTime? nullDate = null;
or
DateTime? nullDate;
As everyone else said, but remember CultureInfo.InvariantCulture
!
string s = dt.ToString("dd/M/yyyy", CultureInfo.InvariantCulture)
OR escape the '/'.
There is are multiple ways to execute the commands or script in the multiple remote Linux machines.
One simple & easiest way is via pssh (parallel ssh program)
pssh: is a program for executing ssh in parallel on a number of hosts. It provides features such as sending input to all of the processes, passing a password to ssh, saving the output to files, and timing out.
Example & Usage:
Connect to host1 and host2, and print "hello, world" from each:
pssh -i -H "host1 host2" echo "hello, world"
Run commands via a script on multiple servers:
pssh -h hosts.txt -P -I<./commands.sh
Usage & run a command without checking or saving host keys:
pssh -h hostname_ip.txt -x '-q -o StrictHostKeyChecking=no -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes' -i 'uptime; hostname -f'
If the file hosts.txt has a large number of entries, say 100, then the parallelism option may also be set to 100 to ensure that the commands are run concurrently:
pssh -i -h hosts.txt -p 100 -t 0 sleep 10000
Options:
-I: Read input and sends to each ssh process.
-P: Tells pssh to display output as it arrives.
-h: Reads the host's file.
-H : [user@]host[:port] for single-host.
-i: Display standard output and standard error as each host completes
-x args: Passes extra SSH command-line arguments
-o option: Can be used to give options in the format used in the configuration file.(/etc/ssh/ssh_config) (~/.ssh/config)
-p parallelism: Use the given number as the maximum number of concurrent connections
-q Quiet mode: Causes most warning and diagnostic messages to be suppressed.
-t: Make connections time out after the given number of seconds. 0 means pssh will not timeout any connections
When ssh'ing to the remote machine, how to handle when it prompts for RSA fingerprint authentication.
Disable the StrictHostKeyChecking to handle the RSA authentication prompt.
-o StrictHostKeyChecking=no
Source: man pssh
Function Concat(myRange As Range, Optional myDelimiter As String) As String
Dim r As Range
Application.Volatile
For Each r In myRange
If Len(r.Text) Then
Concat = Concat & IIf(Concat <> "", myDelimiter, "") & r.Text
End If
Next
End Function
Guys don't forget to call xmlWriter.Close() and xmlWriter.Dispose() or else your string won't finish creating. It will just be an empty string
The reason behind this error is : Flask app is already running, hasn't shut down and in middle of that we try to start another instance by: with app.app_context(): #Code Before we use this with statement we need to make sure that scope of the previous running app is closed.
All the answers here are better, but just in case... There is a way of getting 10 last added records. (thou this is quite unreliable :) ) still you can do something like
SELECT * FROM table LIMIT 10 OFFSET N-10
N - should be the total amount of rows in the table (SELECT count(*) FROM table). You can put it in a single query using prepared queries but I'll not get into that.
DML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete, insert and update data in database.
Examples: SELECT, UPDATE, INSERT statements
DDL is abbreviation of Data Definition Language. It is used to create and modify the structure of database objects in database.
Examples: CREATE, ALTER, DROP statements
Visit this site for more info: http://blog.sqlauthority.com/2008/01/15/sql-server-what-is-dml-ddl-dcl-and-tcl-introduction-and-examples/
You can use the datetime
module for working with dates and times in Python. The strftime
method allows you to produce string representation of dates and times with a format you specify.
>>> import datetime
>>> datetime.date.today().strftime("%B %d, %Y")
'July 23, 2010'
>>> datetime.datetime.now().strftime("%I:%M%p on %B %d, %Y")
'10:36AM on July 23, 2010'
In Drupal 7, you can modify the memory limit in the settings.php file located in your sites/default folder. Around line 260, you'll see this:
ini_set('memory_limit', '128M');
Even if your php.ini settings are high enough, you won't be able to consume more than 128 MB if this isn't set in your Drupal settings.php file.
svn revert -R .
svn up
This will recursively revert the current directory and everything under it and then update to the latest version.
This only inserts if the item to be inserted is not already present.
Works the same as:
if not exists (...) insert ...
in T-SQL
insert into destination (DESTINATIONABBREV)
select 'xyz' from dual
left outer join destination d on d.destinationabbrev = 'xyz'
where d.destinationid is null;
may not be pretty, but it's handy :)
You can use an ExecutorCompletionService. The documentation even has an example for your exact use-case:
Suppose instead that you would like to use the first non-null result of the set of tasks, ignoring any that encounter exceptions, and cancelling all other tasks when the first one is ready:
void solve(Executor e, Collection<Callable<Result>> solvers) throws InterruptedException {
CompletionService<Result> ecs = new ExecutorCompletionService<Result>(e);
int n = solvers.size();
List<Future<Result>> futures = new ArrayList<Future<Result>>(n);
Result result = null;
try {
for (Callable<Result> s : solvers)
futures.add(ecs.submit(s));
for (int i = 0; i < n; ++i) {
try {
Result r = ecs.take().get();
if (r != null) {
result = r;
break;
}
} catch (ExecutionException ignore) {
}
}
} finally {
for (Future<Result> f : futures)
f.cancel(true);
}
if (result != null)
use(result);
}
The important thing to notice here is that ecs.take() will get the first completed task, not just the first submitted one. Thus you should get them in the order of finishing the execution (or throwing an exception).
WSDL (Web Services Description Language) describes your service and its operations - what is the service called, which methods does it offer, what kind of in parameters and return values do these methods have?
It's a description of the behavior of the service - it's functionality.
XSD (Xml Schema Definition) describes the static structure of the complex data types being exchanged by those service methods. It describes the types, their fields, any restriction on those fields (like max length or a regex pattern) and so forth.
It's a description of datatypes and thus static properties of the service - it's about data.
The preceding 0 is used to indicate a number in base 2, 8, or 16.
In my opinion, 0x was chosen to indicate hex because 'x' sounds like hex.
Just my opinion, but I think it makes sense.
Good Day!
In my case it was stupid missing of @OneToOne annotation, i set @MapsId without it
Essentially, there are three settings that one has to update (Preference >> settings):
workbench.editor.enablePreview: set this to globally enable or disable preview editors
workbench.editor.enablePreviewFromQuickOpen: set this to enable or disable preview editors when opened from Quick Open
workbench.editor.showTabs: finally one will need to set this
otherwise, there will be no tabs displayed and you will just be
wondering why setting/unsetting the above two did not work
Most answers will tell you that you have a duplicate certificate. This is true for my case but the answers left out how to do it.
For me, my account expired and I have to get a new certificate and install it. Next, I looked at Keychain and removes the expired certificate but still got the error. What works for me is actually searching for "iPhone" in Keychain and removing all expired certificates. Apparently, some of it are not shown in System/Certificates or login/Certificates.
Hope this helps!
If I'm not mislead, you just need to set your local branches to track their pairs in the origin server.
Using your command line, you can try
git checkout mybranch
git branch --set-upstream-to=origin/mybranch
That will configure something as an equivalent of your local branch in the server. I'll bet that Android Studio is complaining about the lack of that.
If someone knows how to do this using the GUI of that IDE, that would be interesting to read. :)
You need the :not()
selector:
$('div[class^="first-"]:not(.first-bar)')
or, alternatively, the .not()
method:
$('div[class^="first-"]').not('.first-bar');
One more way is::
Write a method in your adapter lets say public void callBack(){}.
Now while creating an object for adapter in activity override this method. Override method will be called when you call the method in adapter.
Myadapter adapter = new Myadapter() {
@Override
public void callBack() {
// dosomething
}
};
Cygwin is is a Unix-like environment and command-line interface for Microsoft Windows.
Mingw is a native software port of the GNU Compiler Collection (GCC) to Microsoft Windows, along with a set of freely distributable import libraries and header files for the Windows API. MinGW allows developers to create native Microsoft Windows applications.
You can run binaries generated with mingw
without the cygwin
environment, provided that all necessary libraries (DLLs) are present.
This is what i just used, i like how clean it is :-)
$('select').val(function(){
var nextOption = $(this).children(':selected').next();
return $(nextOption).val();
}).change();
I've had this same dependency problem and I also know that you can include the VS 8.0 DLLs (release only! not debug!---and your program has to be release, too) in a folder of the appropriate name, in the parent folder with your .exe:
How to: Deploy using XCopy (MSDN)
Also note that things are guaranteed to go awry if you need to have C++ and C code in the same statically linked .exe because you will get linker conflicts that can only be resolved by ignoring the correct libXXX.lib and then linking dynamically (DLLs).
Lastly, with a different toolset (VC++ 6.0) things "just work", since Windows 2000 and above have the correct DLLs installed.
Why does redirect_to(:back)
not work for you, why is it a no go?
redirect_to(:back)
works like a charm for me. It's just a short cut for
redirect_to(request.env['HTTP_REFERER'])
http://apidock.com/rails/ActionController/Base/redirect_to (pre Rails 3) or http://apidock.com/rails/ActionController/Redirecting/redirect_to (Rails 3)
Please note that redirect_to(:back)
is being deprecated in Rails 5. You can use
redirect_back(fallback_location: 'something')
instead (see http://blog.bigbinary.com/2016/02/29/rails-5-improves-redirect_to_back-with-redirect-back.html)
If you are getting that error from Event Viewer, you should see another error event (at least one) from the Source ".NET Runtime". Look at that error message as it will contain the Exception
info.
The Data Export function in MySQL Workbench allows 2 of the 3 ways. There's a checkbox Skip Table Data (no-data)
on the export page which allows to either dump with or without data. Just dumping the data without meta data is not supported.
The move
instruction copies a value from one register to another. The li
instruction loads a specific numeric value into that register.
For the specific case of zero, you can use either the constant zero or the zero register to get that:
move $s0, $zero
li $s0, 0
There's no register that generates a value other than zero, though, so you'd have to use li
if you wanted some other number, like:
li $s0, 12345678
Sort By Value
public Map sortByValue(Map map, final boolean ascending) {
Map result = new LinkedHashMap();
try {
List list = new LinkedList(map.entrySet());
Collections.sort(list, new Comparator() {
@Override
public int compare(Object object1, Object object2) {
if (ascending)
return ((Comparable) ((Map.Entry) (object1)).getValue())
.compareTo(((Map.Entry) (object2)).getValue());
else
return ((Comparable) ((Map.Entry) (object2)).getValue())
.compareTo(((Map.Entry) (object1)).getValue());
}
});
for (Iterator it = list.iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
result.put(entry.getKey(), entry.getValue());
}
} catch (Exception e) {
Log.e("Error", e.getMessage());
}
return result;
}
You should use setStroke
to set a stroke of the Graphics2D
object.
The example at http://www.java2s.com gives you some code examples.
The following code produces the image below:
import java.awt.*;
import java.awt.geom.Line2D;
import javax.swing.*;
public class FrameTest {
public static void main(String[] args) {
JFrame jf = new JFrame("Demo");
Container cp = jf.getContentPane();
cp.add(new JComponent() {
public void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke(10));
g2.draw(new Line2D.Float(30, 20, 80, 90));
}
});
jf.setSize(300, 200);
jf.setVisible(true);
}
}
(Note that the setStroke
method is not available in the Graphics
object. You have to cast it to a Graphics2D
object.)
This post has been rewritten as an article here.
You can find if the textbox is disabled using is
method by passing :disabled
selector to it. Try this.
if($('textbox').is(':disabled')){
//textbox is disabled
}
Here's how you would do it in Kotlin
fun <T> myMethod(item: T) where T : ClassA, T : InterfaceB {
//your code here
}
I have fixed this problem when calling a MVC3 Controller. I added:
Response.AddHeader("Access-Control-Allow-Origin", "*");
before my
return Json(model, JsonRequestBehavior.AllowGet);
And also my $.ajax
was complaining that it does not accept Content-type header in my ajax call, so I commented it out as I know its JSON being passed to the Action.
Hope that helps.
Why make it difficult and hassle with locks? Use Dispatch Barriers.
A dispatch barrier creates a synchronization point within a concurrent queue.
While it’s running, no other block on the queue is allowed to run, even if it’s concurrent and other cores are available.
If that sounds like an exclusive (write) lock, it is. Non-barrier blocks can be thought of as shared (read) locks.
As long as all access to the resource is performed through the queue, barriers provide very cheap synchronization.
This is my simple take on this question, I hope it helps someone out oneday, somewhere...
let output = document.getElementById('stopwatch');
let ms = 0;
let sec = 0;
let min = 0;
function timer() {
ms++;
if(ms >= 100){
sec++
ms = 0
}
if(sec === 60){
min++
sec = 0
}
if(min === 60){
ms, sec, min = 0;
}
//Doing some string interpolation
let milli = ms < 10 ? `0`+ ms : ms;
let seconds = sec < 10 ? `0`+ sec : sec;
let minute = min < 10 ? `0` + min : min;
let timer= `${minute}:${seconds}:${milli}`;
output.innerHTML =timer;
};
//Start timer
function start(){
time = setInterval(timer,10);
}
//stop timer
function stop(){
clearInterval(time)
}
//reset timer
function reset(){
ms = 0;
sec = 0;
min = 0;
output.innerHTML = `00:00:00`
}
const startBtn = document.getElementById('startBtn');
const stopBtn = document.getElementById('stopBtn');
const resetBtn = document.getElementById('resetBtn');
startBtn.addEventListener('click',start,false);
stopBtn.addEventListener('click',stop,false);
resetBtn.addEventListener('click',reset,false);
_x000D_
<p class="stopwatch" id="stopwatch">
<!-- stopwatch goes here -->
</p>
<button class="btn-start" id="startBtn">Start</button>
<button class="btn-stop" id="stopBtn">Stop</button>
<button class="btn-reset" id="resetBtn">Reset</button>
_x000D_
If you're using Gnome, you can go to: Places
-> Connect to Server
in nautilus
and choose SSH. If you have a SSH agent running and configured, no password will be asked!
(This is the same as sftp://root@servername/directory in Nautilus)
In Konqueror, you can simply type: fish://servername.
per Mike R: In Ubuntu Unity 14.0.4 its under Files > Connect to Server in the Menu or Network > Connect to Server in the sidebar
On my Mac neither of these regular methods to uninstall Yarn worked:
brew: brew uninstall yarn
npm: npm uninstall -g yarn
Instead I removed it manually by typing rm -rf ~/.yarn
(thanks user elthrasher) and deleting the two symbol links yarn and yarnpkg from usr/local/bin
.
Afterwards brew install yarn
gave me the latest version of Yarn.
Background: The fact that I had a very outdated version of Yarn installed gave me utterly incomprehensible errors while trying to install additional modules to a project set up with Vue CLI Service and Vue UI, which apparently uses Yarn 'under the hood'. I generally use NPM so it took me a while to figure out the cause for my trouble. Naturally googling error messages produced by such module incompatibilities presented no clues. With Yarn updated everything works just perfectly now.
It means you're passing the variable by reference.
In fact, in a declaration of a type, it means reference, just like:
int x = 42;
int& y = x;
declares a reference to x
, called y
.
It took me few hours to solved this because all off the settings that I found here about this error were the same but it still didn't work. The problem was tha I had a folder in my web service from which the file should be send to WinCE device, after converting that folder to an application with Classic.NetAppPool it started to work.
In the hopes it might narrow things down/help someone, I did an investigatory approach. For me, I initially moved the folder at C:\Users\{user}\AppData\Local\Microsoft\VisualStudio to My Documents and allowed Visual Studio to re-create it by re-launching it. This removed the errors. So I moved everything back, one-by-one, and restarted Visual Studio each time until I discovered the culprits. These folders were fine to move back in:
These files were fine to move back in/overwrite the auto-generated ones:
These files were fine to move back in. Each was in my old copy, and not initially re-created when I re-launched VS:
These caused problems - delete these files and re-launch VS to allow it to re-create them:
These are the errors from those last .NETFramework files (which I do not get if I do not add them back in):
01:10:11.7550: Referenced file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\JavaScript\References\libhelp.js' not found.
01:10:11.7550: Referenced file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\JavaScript\References\sitetypesWeb.js' not found.
01:10:11.7550: Referenced file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\JavaScript\References\domWeb.js' not found.
01:10:11.7550: Referenced file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\JavaScript\References\underscorefilter.js' not found.
01:10:11.7550: Referenced file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\JavaScript\References\showPlainComments.js' not found.
I might just need to re-install/repair the JavaScript Language Service plug-in, so it might be un-related. But definitely devenv.exe.config and ComponentModelCache need to go to correct the "object reference not set to an instance of an object" error.
Per @Beau's answer, Chrome does not support localhost CORS requests, and there is unlikely any change in this direction.
I use the Allow-Control-Allow-Origin: * Chrome Extension to go around this issue. The extension will add the necessary HTTP Headers for CORS:
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: "GET, PUT, POST, DELETE, HEAD, OPTIONS"
Access-Control-Expose-Headers: <you can add values here>
The source code is published on Github.
Note that the extension filter all URLs by default. This may break some websites (for example: Dropbox). I have changed it to filter only localhost URLs with the following URL filter
*://localhost:*/*
Depends on the extension. If it's .html, you can use <?
to start and ?>
to end a comment. That's really the only alternative that I can think of. http://jsfiddle.net/SuEAW/
In Eclipse Ganymede (3.4.0):
BOOTSTRAP 2 (source)
The problem is that there is no width set on the buttons. Try this:
.btn {width:20%;}
EDIT:
By default the buttons take an auto width of its text length plus some padding, so I guess for your example it is probably more like 14.5% for 5 buttons (to compensate for the padding).
Note:
If you don't want to try and compensate for padding you can use box-sizing:border-box;
For example in my case I accidentaly changed role of some users to incorrect, and my application got error during starting (NullReferenceException). When I fixed it - the app starts fine.
If you want to revert the changes only in current working directory, use
git checkout -- .
And before that, you can list the files that will be reverted without actually making any action, just to check what will happen, with:
git checkout --
PRAGMA table_info(table_name);
This will work for both: command-line and when executed against a connected database.
A link for more details and example. thanks SQLite Pragma Command
By using Prestaul's answer, I added some checks and I prefer to use the jQuery way.
<img src="image1.png" onerror="imgError(this,1);"/>
<img src="image2.png" onerror="imgError(this,2);"/>
function imgError(image, type) {
if (typeof jQuery !== 'undefined') {
var imgWidth=$(image).attr("width");
var imgHeight=$(image).attr("height");
// Type 1 puts a placeholder image
// Type 2 hides img tag
if (type == 1) {
if (typeof imgWidth !== 'undefined' && typeof imgHeight !== 'undefined') {
$(image).attr("src", "http://lorempixel.com/" + imgWidth + "/" + imgHeight + "/");
} else {
$(image).attr("src", "http://lorempixel.com/200/200/");
}
} else if (type == 2) {
$(image).hide();
}
}
return true;
}
FYI, it looks like the syntax for retrieving the values has changed according to:
http://freemarker.sourceforge.net/docs/ref_builtins_hash.html
<#assign h = {"name":"mouse", "price":50}>
<#assign keys = h?keys>
<#list keys as key>${key} = ${h[key]}; </#list>
I believe another solution to this problem would be use to variables of type long instead of int.
I was just working on some code where the % operator was returning a negative value which caused some issues (for generating uniform random variables on [0,1] you don't really want negative numbers :) ), but after switching the variables to type long, everything was running smoothly and the results matched the ones I was getting when running the same code in python (important for me as I wanted to be able to generate the same "random" numbers across several platforms.
display
settingIt is of course possible - JSFiddle proof of concept where you can see all three possible solutions:
display: inline-block
- this is the one you're not aware of
position: absolute
float: left/right
This is how I did it with a large (50 GB) file:
I tried 2 different ways: the first, reading the file into memory and using Regex Replace or String Replace. Then I appended the entire string to a temporary file.
The first method works well for a few Regex replacements, but Regex.Replace or String.Replace could cause out of memory error if you do many replaces in a large file.
The second is by reading the temp file line by line and manually building each line using StringBuilder and appending each processed line to the result file. This method was pretty fast.
static void ProcessLargeFile()
{
if (File.Exists(outFileName)) File.Delete(outFileName);
string text = File.ReadAllText(inputFileName, Encoding.UTF8);
// EX 1 This opens entire file in memory and uses Replace and Regex Replace --> might cause out of memory error
text = text.Replace("</text>", "");
text = Regex.Replace(text, @"\<ref.*?\</ref\>", "");
File.WriteAllText(outFileName, text);
// EX 2 This reads file line by line
if (File.Exists(outFileName)) File.Delete(outFileName);
using (var sw = new StreamWriter(outFileName))
using (var fs = File.OpenRead(inFileName))
using (var sr = new StreamReader(fs, Encoding.UTF8)) //use UTF8 encoding or whatever encoding your file uses
{
string line, newLine;
while ((line = sr.ReadLine()) != null)
{
//note: call your own replace function or use String.Replace here
newLine = Util.ReplaceDoubleBrackets(line);
sw.WriteLine(newLine);
}
}
}
public static string ReplaceDoubleBrackets(string str)
{
//note: this replaces the first occurrence of a word delimited by [[ ]]
//replace [[ with your own delimiter
if (str.IndexOf("[[") < 0)
return str;
StringBuilder sb = new StringBuilder();
//this part gets the string to replace, put this in a loop if more than one occurrence per line.
int posStart = str.IndexOf("[[");
int posEnd = str.IndexOf("]]");
int length = posEnd - posStart;
// ... code to replace with newstr
sb.Append(newstr);
return sb.ToString();
}
You can do it just using a loop.
$singleArray = array();
foreach ($multiDimensionalArray as $key => $value){
$singleArray[$key] = $value['plan'];
}
Just put "End" keyword in your code.
Sub Form_Load()
Dim answer As MsgBoxResult
answer = MsgBox("Do you want to quit now?", MsgBoxStyle.YesNo)
If answer = MsgBoxResult.Yes Then
MsgBox("Terminating program")
End
End If
End Sub
From the manual:
Possible values for the parameter timeout: … x set timeout to x seconds
and
readlines(sizehint=None, eol='\n') Read a list of lines, until timeout. sizehint is ignored and only present for API compatibility with built-in File objects.
Note that this function only returns on a timeout.
So your readlines
will return at most every 2 seconds. Use read()
as Tim suggested.
I am reading data very quickly using the new arrow
package. It appears to be in a fairly early stage.
Specifically, I am using the parquet columnar format. This converts back to a data.frame
in R, but you can get even deeper speedups if you do not. This format is convenient as it can be used from Python as well.
My main use case for this is on a fairly restrained RShiny server. For these reasons, I prefer to keep data attached to the Apps (i.e., out of SQL), and therefore require small file size as well as speed.
This linked article provides benchmarking and a good overview. I have quoted some interesting points below.
https://ursalabs.org/blog/2019-10-columnar-perf/
That is, the Parquet file is half as big as even the gzipped CSV. One of the reasons that the Parquet file is so small is because of dictionary-encoding (also called “dictionary compression”). Dictionary compression can yield substantially better compression than using a general purpose bytes compressor like LZ4 or ZSTD (which are used in the FST format). Parquet was designed to produce very small files that are fast to read.
When controlling by output type (e.g. comparing all R data.frame outputs with each other) we see the the performance of Parquet, Feather, and FST falls within a relatively small margin of each other. The same is true of the pandas.DataFrame outputs. data.table::fread is impressively competitive with the 1.5 GB file size but lags the others on the 2.5 GB CSV.
I performed some independent benchmarking on a simulated dataset of 1,000,000 rows. Basically I shuffled a bunch of things around to attempt to challenge the compression. Also I added a short text field of random words and two simulated factors.
library(dplyr)
library(tibble)
library(OpenRepGrid)
n <- 1000000
set.seed(1234)
some_levels1 <- sapply(1:10, function(x) paste(LETTERS[sample(1:26, size = sample(3:8, 1), replace = TRUE)], collapse = ""))
some_levels2 <- sapply(1:65, function(x) paste(LETTERS[sample(1:26, size = sample(5:16, 1), replace = TRUE)], collapse = ""))
test_data <- mtcars %>%
rownames_to_column() %>%
sample_n(n, replace = TRUE) %>%
mutate_all(~ sample(., length(.))) %>%
mutate(factor1 = sample(some_levels1, n, replace = TRUE),
factor2 = sample(some_levels2, n, replace = TRUE),
text = randomSentences(n, sample(3:8, n, replace = TRUE))
)
Writing the data is easy.
library(arrow)
write_parquet(test_data , "test_data.parquet")
# you can also mess with the compression
write_parquet(test_data, "test_data2.parquet", compress = "gzip", compression_level = 9)
Reading the data is also easy.
read_parquet("test_data.parquet")
# this option will result in lightning fast reads, but in a different format.
read_parquet("test_data2.parquet", as_data_frame = FALSE)
I tested reading this data against a few of the competing options, and did get slightly different results than with the article above, which is expected.
This file is nowhere near as large as the benchmark article, so maybe that is the difference.
as_data_frame = FALSE
)arrow
)feather
)For this particular file, fread
is actually very fast. I like the small file size from the highly compressed parquet2
test. I may invest the time to work with the native data format rather than a data.frame
if I really need the speed up.
Here fst
is also a great choice. I would either use the highly compressed fst
format or the highly compressed parquet
depending on if I needed the speed or file size trade off.
The default value of enum is the enummember equal to 0 or the first element(if value is not specified)
... But i have faced critical problems using enum in my projects and overcome by doing something below ... How ever my need was related to class level ...
class CDDtype
{
public int Id { get; set; }
public DDType DDType { get; set; }
public CDDtype()
{
DDType = DDType.None;
}
}
[DefaultValue(None)]
public enum DDType
{
None = -1,
ON = 0,
FC = 1,
NC = 2,
CC = 3
}
and get expected result
CDDtype d1= new CDDtype();
CDDtype d2 = new CDDtype { Id = 50 };
Console.Write(d1.DDType);//None
Console.Write(d2.DDType);//None
Now what if value is coming from DB .... Ok in this scenario... pass value in below function and it will convertthe value to enum ...below function handled various scenario and it's generic... and believe me it is very fast ..... :)
public static T ToEnum<T>(this object value)
{
//Checking value is null or DBNull
if (!value.IsNull())
{
return (T)Enum.Parse(typeof(T), value.ToStringX());
}
//Returanable object
object ValueToReturn = null;
//First checking whether any 'DefaultValueAttribute' is present or not
var DefaultAtt = (from a in typeof(T).CustomAttributes
where a.AttributeType == typeof(DefaultValueAttribute)
select a).FirstOrNull();
//If DefaultAttributeValue is present
if ((!DefaultAtt.IsNull()) && (DefaultAtt.ConstructorArguments.Count == 1))
{
ValueToReturn = DefaultAtt.ConstructorArguments[0].Value;
}
//If still no value found
if (ValueToReturn.IsNull())
{
//Trying to get the very first property of that enum
Array Values = Enum.GetValues(typeof(T));
//getting very first member of this enum
if (Values.Length > 0)
{
ValueToReturn = Values.GetValue(0);
}
}
//If any result found
if (!ValueToReturn.IsNull())
{
return (T)Enum.Parse(typeof(T), ValueToReturn.ToStringX());
}
return default(T);
}
If you have the values that you want to insert in another table already, then you can Insert from a select statement.
INSERT INTO a_table (column_a, column_b) SELECT column_a, column_b FROM b_table;
Otherwise, you can list a bunch of single row insert statements and submit several queries in bulk to save the time for something that works in both Oracle and MySQL.
@Espo's solution is also a good one that will work in both Oracle and MySQL if your data isn't already in a table.
I'm using jersey 2.0 with message body readers and writers. I had my method return type as a specific entity which was also used in the implementation of the message body writer and i was returning the same pojo, a SkuListDTO. @GET @Consumes({"application/xml", "application/json"}) @Produces({"application/xml", "application/json"}) @Path("/skuResync")
public SkuResultListDTO getSkuData()
....
return SkuResultListDTO;
all i changed was this, I left the writer implementation alone and it still worked.
public Response getSkuData()
...
return Response.status(Response.Status.FORBIDDEN).entity(dfCoreResultListDTO).build();
I think that moving last operator to the beginning of the next line is a good practice. That way you know right away the purpose of the second line, even it doesn't start with an operator. I also recommend 2 indentation spaces (2 tabs) for a previously broken tab, to differ it from the normal indentation. That is immediately visible as continuing previous line. Therefore I suggest this:
private static final Map<Class<? extends Persistent>, PersistentHelper> class2helper
= new HashMap<Class<? extends Persistent>, PersistentHelper>();
If the starting cell of the range and of the key is static, the solution can be very simple:
Range("A3").Select
Range(Selection, Selection.End(xlToRight)).Select
Range(Selection, Selection.End(xlDown)).Select
Selection.Sort key1:=Range("B3", Range("B3").End(xlDown)), _
order1:=xlAscending, Header:=xlNo
Here's what I did:
That's it. I have tested it with my Nokia and it's working for me.
You can even add the size of the terms (indexed terms). Have a look at Elastic Search: how to see the indexed data
Been a while since I was in ASP land, but iirc there's a couple of ways:
try catch finally
can be reasonably simulated in VBS (good article here here) and there's an event called class_terminate
you can watch and catch exceptions globally in. Then there's the possibility of changing your scripting language...
Intent intent = new Intent(activity1.this, activity2.class);
intent.putExtra("message", message);
startActivity(intent);
In activity2, in onCreate(), you can get the String message by retrieving a Bundle (which contains all the messages sent by the calling activity) and call getString() on it :
Bundle bundle = getIntent().getExtras();
String message = bundle.getString("message");
As of Chrome 46, a simple onclick=window.close()
does the trick. This only closes the tab, and not the entire browser, if multiple tabs are opened.
You should use the following:
<td><input id="priceInput-{{orderLine.id}}" type="number" [(ngModel)]="orderLine.price"></td>
You will need to add the FormsModule
to your app.module
in the inputs
section as follows:
import { FormsModule } from '@angular/forms';
@NgModule({
declarations: [
...
],
imports: [
BrowserModule,
FormsModule
],
..
The use of the brackets around the ngModel
are as follows:
The []
show that it is taking an input from your TS file. This input should be a public member variable. A one way binding from TS to HTML.
The ()
show that it is taking output from your HTML file to a variable in the TS file. A one way binding from HTML to TS.
The [()]
are both (e.g. a two way binding)
See here for more information: https://angular.io/guide/template-syntax
I would also suggest replacing id="priceInput-{{orderLine.id}}"
with something like this [id]="getElementId(orderLine)"
where getElementId(orderLine)
returns the element Id in the TS file and can be used anywere you need to reference the element (to avoid simple bugs like calling it priceInput1
in one place and priceInput-1
in another. (if you still need to access the input by it's Id somewhere else)
Here are 4 ways to insert data into a table.
Simple insertion when the table column sequence is known.
INSERT INTO Table1 VALUES (1,2,...)
Simple insertion into specified columns of the table.
INSERT INTO Table1(col2,col4) VALUES (1,2)
Bulk insertion when...
INSERT INTO Table1 {Column sequence} SELECT * FROM Table2
Bulk insertion of selected data into specified columns of Table2.
.
INSERT INTO Table1 (Column1,Column2 ....)
SELECT Column1,Column2...
FROM Table2
To extend your max_execution_time
you can use either ini_set
or set_time_limit
.
// Set maximum execution time to 10 seconds this way
ini_set('max_execution_time', 10);
// or this way
set_time_limit(10);
sleep(2);
ini_set('max_execution_time', 5);
register_shutdown_function(function(){
var_dump(microtime(true) - $_SERVER['REQUEST_TIME_FLOAT']);
});
for(;;);
//
// var_dump outputs float(7.1981489658356)
//
so if you want to set exact maximum amount of time script can run, your command must be very first.
Differences between those two functions are
set_time_limit
does not return info whether it was successful but it will throw a warning on error.ini_set
returns old value on success, or false on failure without any warning/error