The [] operator is called an indexer. You can provide indexers that take an integer, a string, or any other type you want to use as a key. The syntax is straightforward, following the same principles as property accessors.
For example, in your case where an int
is the key or index:
public int this[int index]
{
get => GetValue(index);
}
You can also add a set accessor so that the indexer becomes read and write rather than just read-only.
public int this[int index]
{
get => GetValue(index);
set => SetValue(index, value);
}
If you want to index using a different type, you just change the signature of the indexer.
public int this[string index]
...
PNG has 2 advantages: it has smaller size and it's more widely used and supported (except in case favicons). As mentioned before ICO, can have multiple size icons, which is useful for desktop applications, but not too much for websites. I would recommend you to put a favicon.ico in the root of your application. An if you have access to the Head of your website pages use the tag to point to a png file. So older browser will show the favicon.ico and newer ones the png.
To create Png and Icon files I would recommend The Gimp.
I faced similar problem using ui bootstrap directive for angularjs - uib-datepicker, when pressing am/pm toggle.
Error in event handler for (unknown): SyntaxError: Unexpected end of JSON input angular timepicker
Turned out it was because of plugin 'Trans-over' (which translates a word when it is clicked). Maybe my answer will help someone, because I didn't found anything on the internet.
Lookarounds can be nested.
So this regex matches "drupal-6.14/" that is not followed by "sites" that is not followed by "/all" or "/default".
Confusing? Using different words, we can say it matches "drupal-6.14/" that is not followed by "sites" unless that is further followed by "/all" or "/default"
It is enough to close just Statement
and Connection
. There is no need to explicitly close the ResultSet
object.
Java documentation says about java.sql.ResultSet
:
A ResultSet object is automatically closed by the Statement object that generated it when that Statement object is closed, re-executed, or is used to retrieve the next result from a sequence of multiple results.
Thanks BalusC for comments: "I wouldn't rely on that. Some JDBC drivers fail on that."
I also got the same error. I've referred to the below mentioned link and ran this commands
gpg --import fails with no valid OpenPGP data found
gpg --import KEYS
sudo apt-get update
It worked.
I'm using Ubuntu version 12.04
To add a linked text in a text view, you can use the "footer_text" string resource example below and also edit your onCreate method for your activity, you can use the example below
string.xml
<?xml version="1.0" charset="utf-8"?>
<resources>
<string name="app_name">Name of My Application</string>
<string name="footer_text">
<a href="https://www.google.com/tos">Terms of Service</a>
<a href="https://www.google.com/contact">Contact</a>
<a href="https://www.google.com/privacy">Privacy Policy</a>
</string>
</resources>
MainActivity.java
...
@Override
public void onCreate(Bundle savedInstance) {
super.onCreate(savedInstance);
setContentView(R.layout.activity_main);
TextView textView = findViewById(R.id.textViewLink);
textView.setMovementMethod(LinkMovermentMethod.getInstance());
}
....
You can use 'apply' to run a function or the rows or columns of a matrix or numerical data frame:
cluster1 <- data.frame(a=1:5, b=11:15, c=21:25, d=31:35)
apply(cluster1,2,mean) # applies function 'mean' to 2nd dimension (columns)
apply(cluster1,1,mean) # applies function to 1st dimension (rows)
sapply(cluster1, mean) # also takes mean of columns, treating data frame like list of vectors
If you want to both OnTouch
and OnClick
listener to parent and child view both, please use below trick:
User ScrollView as a Parent view and inside that placed your child view inside Relative/LinearLayout.
Make Parent ScrollView android:fillViewport="true"
so View not be scrolled.
Then set OnTouch
listener to parent and OnClick
listener to Child views.
And enjoy both listener callbacks.
You don't have to do anything special, it should just be working.
When I have a fresh rails app with this controller:
class FooController < ApplicationController
def index
raise "error"
end
end
and go to http://127.0.0.1:3000/foo/
I am seeing the exception with a stack trace.
You might not see the whole stacktrace in the console log because Rails (since 2.3) filters lines from the stack trace that come from the framework itself.
See config/initializers/backtrace_silencers.rb
in your Rails project
I'll tell you what worked for me:
int id = int.Parse(insertItem.OwnerTableView.DataKeyValues[insertItem.ItemIndex]["id_usuario"].ToString());
var query = user.First(x => x.id_usuario == id);
tbUsername.Text = query.username;
tbEmail.Text = query.email;
tbPassword.Text = query.password;
My id is the row I want to query, in this case I got it from a radGrid, then I used it to query, but this query returns a row, then you can assign the values you got from the query to textbox, or anything, I had to assign those to textbox.
Summary
Assuming ordering is not important:
std::unordered_map
std::map
. This is because reads on it are O(log n)
.std::map
is good option. std::unordered_map
.Historical Context
In most languages, unordered map (aka hash based dictionaries) are the default map however in C++ you get ordered map as default map. How did that happen? Some people erroneously assume that C++ committee made this decision in their unique wisdom but the truth is unfortunately uglier than that.
It is widely believed that C++ ended up with ordered map as default because there are not too many parameters on how they can be implemented. On the other hand, hash based implementations has tons of things to talk about. So to avoid gridlocks in standardization they just got along with ordered map. Around 2005, many languages already had good implementations of hash based implementation and so it was more easier for the committee to accept new std::unordered_map
. In a perfect world, std::map
would have been unordered and we would have std::ordered_map
as separate type.
Performance
Below two graphs should speak for themselves (source):
I can also propose following solution for C++11.
for (auto p = 0U; p < sys.size(); p++) {
}
(C++ is not smart enough for auto p = 0, so I have to put p = 0U....)
You can write in this way
<string name="you_me">You & Me<string>
Output: You & Me
I was searching a way to connect 4 devices with bluetooth and I found the following.
http://groups.google.com/group/android-developers/browse_thread/thread/69d7810f6ef9bb7d
I'm not sure that this is what you want.
But in order to connect more than 2 devices using bluetooth you have to create a different UUID for each device you want to connect.
Follow the link to see code examples and a better explanation.
function initialize() {
var location = new google.maps.LatLng(44.5403, -78.5463);
var mapCanvas = document.getElementById('map_canvas');
var map_options = {
center: location,
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(map_canvas, map_options);
new google.maps.Marker({
position: location,
map: map
});
}
google.maps.event.addDomListener(window, 'load', initialize);
Since creating branches in Git is trivial you could just create a temporary branch and check the individual files into it.
Detect the browser and use Data-URI for Chrome and use PDF.js as below for other browsers.
PDFJS.getDocument(url_of_pdf)
.then(function(pdf) {
return pdf.getPage(1);
})
.then(function(page) {
// get a viewport
var scale = 1.5;
var viewport = page.getViewport(scale);
// get or create a canvas
var canvas = ...;
canvas.width = viewport.width;
canvas.height = viewport.height;
// render a page
page.render({
canvasContext: canvas.getContext('2d'),
viewport: viewport
});
})
.catch(function(err) {
// deal with errors here!
});
If you are on a mysql server and if you don't mind loosing your tables, you can use a simple query to delete multiple tables at once:
SET foreign_key_checks = 0;
DROP TABLE IF EXISTS table_a,table_b,table_c,table_etc;
SET foreign_key_checks = 1;
In this way it doesn't matter in what order you use the table in you query.
If anybody is going to say something about the fact that this is not a good solution if you have a database with many tables: I agree!
You can also use the IsDBNull function:
If Not IsDBNull(editTransactionRow.pay_id) Then
...
In response to Brian MacKay's answer:
I inject the JavaScript into my page via the ScriptManager instead of putting it directly into the HTML of the UserControl. In my case, I need to scroll to a form that is made visible after the UpdatePanel has finished and returned. This goes in the code behind file. In my sample, I've already created the prm variable on the main content page.
private void ShowForm(bool pShowForm) {
//other code here...
if (pShowForm) {
FocusOnControl(GetFocusOnFormScript(yourControl.ClientID), yourControl.ClientID);
}
}
private void FocusOnControl(string pScript, string pControlId) {
ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "focusControl_" + pControlId, pScript, true);
}
/// <summary>
/// Scrolls to the form that is made visible
/// </summary>
/// <param name="pControlId">The ClientID of the control to focus on after the form is made visible</param>
/// <returns></returns>
private string GetFocusOnFormScript(string pControlId) {
string script = @"
function FocusOnForm() {
var scrollToForm = $('#" + pControlId + @"').offset().top;
$('html, body').animate({
scrollTop: scrollToForm},
'slow'
);
/* This removes the event from the PageRequestManager immediately after the desired functionality is completed so that multiple events are not added */
prm.remove_endRequest(ScrollFocusToFormCaller);
}
prm.add_endRequest(ScrollFocusToFormCaller);
function ScrollFocusToFormCaller(sender, args) {
if (args.get_error() == undefined) {
FocusOnForm();
}
}";
return script;
}
Use the PasteSpecial method:
sht.Columns("A:G").Copy
Range("A1").PasteSpecial Paste:=xlPasteValues
BUT your big problem is that you're changing your ActiveSheet to "Data" and not changing it back. You don't need to do the Activate and Select, as per my code (this assumes your button is on the sheet you want to copy to).
SELECT NULL
FROM HRMTable hm(NOLOCK)
WHERE hm.EmployeeID = 123
AND (
(
CAST(@Fromdate AS date) BETWEEN CAST(hm.FromDate AS date)
AND CAST(hm.ToDate AS date)
)
OR (
CAST(@Todate AS date) BETWEEN CAST(hm.FromDate AS date)
AND CAST(hm.ToDate AS date)
)
)
)
You should make tags their own table with a linking table.
items:
id object
1 lamp
2 table
3 stool
4 bench
tags:
id tag
1 furniture
2 chair
items_tags:
item_id tag_id
1 1
2 1
3 1
4 1
3 2
4 2
You could also add this
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
to ~/.bash_profile
, then create ~/.bashrc
where you can just add more paths to PATH. An example with .
export PATH=$PATH:.
Just use this:
List<SomeBean> newList = new ArrayList<SomeBean>(otherList);
Note: still not thread safe, if you modify otherList
from another thread, then you may want to make that otherList
(and even newList
) a CopyOnWriteArrayList
, for instance -- or use a lock primitive, such as ReentrantReadWriteLock to serialize read/write access to whatever lists are concurrently accessed.
look at http://quickrails.com/twitter-bootstrap-modal-how-to-remove-slide-down-effect-but-leaves-the-fade/
.modal.fade .modal-dialog
{
-moz-transition: none !important;
-o-transition: none !important;
-webkit-transition: none !important;
transition: none !important;
-moz-transform: none !important;
-ms-transform: none !important;
-o-transform: none !important;
-webkit-transform: none !important;
transform: none !important;
}
DataFrames
are based on RDDs. RDDs are immutable structures and do not allow updating elements on-site. To change values, you will need to create a new DataFrame by transforming the original one either using the SQL-like DSL or RDD operations like map
.
A highly recommended slide deck: Introducing DataFrames in Spark for Large Scale Data Science.
You can use diff
tool in linux to compare two files. You can use --changed-group-format and --unchanged-group-format options to filter required data.
Following three options can use to select the relevant group for each option:
'%<' get lines from FILE1
'%>' get lines from FILE2
'' (empty string) for removing lines from both files.
E.g: diff --changed-group-format="%<" --unchanged-group-format="" file1.txt file2.txt
[root@vmoracle11 tmp]# cat file1.txt
test one
test two
test three
test four
test eight
[root@vmoracle11 tmp]# cat file2.txt
test one
test three
test nine
[root@vmoracle11 tmp]# diff --changed-group-format='%<' --unchanged-group-format='' file1.txt file2.txt
test two
test four
test eight
Just download the site from the JD page. I was able to install from a local site in the isntalled software section of eclipse.
import urllib2
try:
fileHandle = urllib2.urlopen('http://www.python.org/fish.html')
data = fileHandle.read()
fileHandle.close()
except urllib2.URLError, e:
print 'you got an error with the code', e
This worked for me
yum install mysql
It will install mysql client and then
pip install mysqlclient
Because b + a ="someonedamage"
, try this to achieve :
if (d.Contains(b) && d.Contains(a))
{
Console.WriteLine(" " + d);
Console.ReadLine();
}
Technically, putting null or 0, or just some random value there works (since you are not using the return value). However, why are you using this construct instead of the if
construct? It is less obvious what you are trying to do when you write code this way, as you may confuse people with the no-op (null in your case).
My lightweight implementation of ParallelForEach async.
Features:
public static class AsyncEx
{
public static async Task ParallelForEachAsync<T>(this IEnumerable<T> source, Func<T, Task> asyncAction, int maxDegreeOfParallelism = 10)
{
var semaphoreSlim = new SemaphoreSlim(maxDegreeOfParallelism);
var tcs = new TaskCompletionSource<object>();
var exceptions = new ConcurrentBag<Exception>();
bool addingCompleted = false;
foreach (T item in source)
{
await semaphoreSlim.WaitAsync();
asyncAction(item).ContinueWith(t =>
{
semaphoreSlim.Release();
if (t.Exception != null)
{
exceptions.Add(t.Exception);
}
if (Volatile.Read(ref addingCompleted) && semaphoreSlim.CurrentCount == maxDegreeOfParallelism)
{
tcs.TrySetResult(null);
}
});
}
Volatile.Write(ref addingCompleted, true);
await tcs.Task;
if (exceptions.Count > 0)
{
throw new AggregateException(exceptions);
}
}
}
Usage example:
await Enumerable.Range(1, 10000).ParallelForEachAsync(async (i) =>
{
var data = await GetData(i);
}, maxDegreeOfParallelism: 100);
While the other folks who answered this question are (sadly) correct that this information is hidden from us by the browser, I thought I'd post a workaround I came up with:
I configured my server app to set a custom response header (X-Response-Url
) containing the url that was requested. Whenever my ajax code receives a response, it checks if xhr.getResponseHeader("x-response-url")
is defined, in which case it compares it to the url that it originally requested via $.ajax()
. If the strings differ, I know there was a redirect, and additionally, what url we actually arrived at.
This does have the drawback of requiring some server-side help, and also may break down if the url gets munged (due to quoting/encoding issues etc) during the round trip... but for 99% of cases, this seems to get the job done.
On the server side, my specific case was a python application using the Pyramid web framework, and I used the following snippet:
import pyramid.events
@pyramid.events.subscriber(pyramid.events.NewResponse)
def set_response_header(event):
request = event.request
if request.is_xhr:
event.response.headers['X-Response-URL'] = request.url
According to the documentation of the PropertyFile
task, you can append the generated properties to an existing file. You could have a properties file with just the comment line, and have the Ant task append the generated properties.
You want str replace, because performance-wise it's much cheaper and still fits your needs!
$title = str_replace( array( '\'', '"', ',' , ';', '<', '>' ), ' ', $rawtitle);
(Unless this is all about security and sql injection, in that case, I'd rather to go with a POSITIVE list of ALLOWED characters... even better, stick with tested, proven routines.)
Btw, since the OP talked about title-setting: I wouldn't replace special chars with nothing, but with a space. A superficious space is less of a problem than two words glued together...
AGE
is defined as "42"
so the line:
str += "Do you feel " + AGE + " years old?";
is converted to:
str += "Do you feel " + "42" + " years old?";
Which isn't valid since "Do you feel "
and "42"
are both const char[]
. To solve this, you can make one a std::string
, or just remove the +
:
// 1.
str += std::string("Do you feel ") + AGE + " years old?";
// 2.
str += "Do you feel " AGE " years old?";
String myString = getString(R.string.mystring);
easy way
The problem of using Application.Restart() is, that it starts a new process but the "old" one is still remaining. Therefor I decided to Kill the old process by using the following code snippet:
if(Condition){
Application.Restart();
Process.GetCurrentProcess().Kill();
}
And it works proper good. In my case MATLAB and a C# Application are sharing the same SQLite database. If MATLAB is using the database, the Form-App should restart (+Countdown) again, until MATLAB reset its busy bit in the database. (Just for side information)
Good answers here, but if you want the label respects the user's preferred size category, use preferredFont
.
UIFont.systemFont(ofSize: UIFont.preferredFont(forTextStyle: .body).pointSize, weight: .bold)
Just a recommendation:
I'd recommend using the DOM table implementation, it's very straight forward and easy to use, you really don't need jQuery for this task.
var table = document.getElementById('tblOne');
var rowLength = table.rows.length;
for(var i=0; i<rowLength; i+=1){
var row = table.rows[i];
//your code goes here, looping over every row.
//cells are accessed as easy
var cellLength = row.cells.length;
for(var y=0; y<cellLength; y+=1){
var cell = row.cells[y];
//do something with every cell here
}
}
var a = ['a','b','c'];
var b = ['d','e','f'];
var c = a.concat(b); //c is now an an array with: ['a','b','c','d','e','f']
console.log( c[3] ); //c[3] will be 'd'
When this happened to me with the WindowsAPICodePack after I updated it, I just rebuilt the solution.
Build-->Rebuild Solution
You're trying to declare strategy
twice, and that's why you're getting the above error. The following works without any complaints (compiled with gcc -ansi -pedantic -Wall
):
#include <stdio.h>
enum { RANDOM, IMMEDIATE, SEARCH } strategy = IMMEDIATE;
int main(int argc, char** argv){
printf("strategy: %d\n", strategy);
return 0;
}
If instead of the above, the second line were changed to:
...
enum { RANDOM, IMMEDIATE, SEARCH } strategy;
strategy = IMMEDIATE;
...
From the warnings, you could easily see your mistake:
enums.c:5:1: warning: data definition has no type or storage class [enabled by default]
enums.c:5:1: warning: type defaults to ‘int’ in declaration of ‘strategy’ [-Wimplicit-int]
enums.c:5:1: error: conflicting types for ‘strategy’
enums.c:4:36: note: previous declaration of ‘strategy’ was here
So the compiler took strategy = IMMEDIATE
for a declaration of a variable called strategy
with default type int
, but there was already a previous declaration of a variable with this name.
However, if you placed the assignment in the main()
function, it would be a valid code:
#include <stdio.h>
enum { RANDOM, IMMEDIATE, SEARCH } strategy = IMMEDIATE;
int main(int argc, char** argv){
strategy=SEARCH;
printf("strategy: %d\n", strategy);
return 0;
}
I find Core Graphics to be pretty simple for Swift 3:
if let cgcontext = UIGraphicsGetCurrentContext() {
cgcontext.strokeEllipse(in: CGRect(x: center.x-diameter/2, y: center.y-diameter/2, width: diameter, height: diameter))
}
With jQuery:
jQuery('#myDivID').css("background-color");
With prototype:
$('myDivID').getStyle('backgroundColor');
With pure JS:
document.getElementById("myDivID").style.backgroundColor
This is default database :
$db['default'] = array(
'dsn' => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'mydatabase',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => TRUE,
'db_debug' => (ENVIRONMENT !== 'production'),
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);
Add another database at the bottom of database.php file
$db['second'] = array(
'dsn' => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'mysecond',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => TRUE,
'db_debug' => (ENVIRONMENT !== 'production'),
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);
In autoload.php config file
$autoload['libraries'] = array('database', 'email', 'session');
The default database is worked fine by autoload the database library but second database load and connect by using constructor in model and controller...
<?php
class Seconddb_model extends CI_Model {
function __construct(){
parent::__construct();
//load our second db and put in $db2
$this->db2 = $this->load->database('second', TRUE);
}
public function getsecondUsers(){
$query = $this->db2->get('members');
return $query->result();
}
}
?>
I used to use the easy_install pip==1.2.1
workaround but I randomly found that if you're having this bug, you probably installed a 32bit version of python.
If you install a 64bit version of it by installing it from the source and then build you virtualenv upon it, you wont have that pip bug anymore.
setup.py is designed to be run from the command line. You'll need to open your command prompt (In Windows 7, hold down shift while right-clicking in the directory with the setup.py file. You should be able to select "Open Command Window Here").
From the command line, you can type
python setup.py --help
...to get a list of commands. What you are looking to do is...
python setup.py install
Just use:
function getData() {
$.ajax({
url : 'example.com',
type: 'GET',
success : handleData
})
}
The success
property requires only a reference to a function, and passes the data as parameter to this function.
You can access your handleData
function like this because of the way handleData
is declared. JavaScript will parse your code for function declarations before running it, so you'll be able to use the function in code that's before the actual declaration. This is known as hoisting.
This doesn't count for functions declared like this, though:
var myfunction = function(){}
Those are only available when the interpreter passed them.
See this question for more information about the 2 ways of declaring functions
Notepad++ address has changed, so many of the links above are broken. The up to date link for this question is here: https://npp-user-manual.org/docs/plugins/
Just in case the address changes again, here is what we have there today:
How to install a plugin
Install plugin manually
If the plugin you want to install is not listed in the Plugins Admin, you may still install it manually. The plugin (in the DLL form) should be placed in the plugins subfolder of the Notepad++ Install Folder, under the subfolder with the same name of plugin binary name without file extension. For example, if the plugin you want to install named myAwesomePlugin.dll, you should install it with the following path: %PROGRAMFILES(x86)%\Notepad++\plugins\myAwesomePlugin\myAwesomePlugin.dll
Once you installed the plugin, you can use (and you may configure) it via the menu “Plugins”.
Your query is close you need to join using the mgr
and the empid
on e1.mgr = e2.empid
So the full query is:
select e1.ename Emp,
e2.eName Mgr
from employees e1
inner join employees e2
on e1.mgr = e2.empid
If you want to return all rows including those without a manager then you would change it to a LEFT JOIN
(for example the president):
select e1.ename Emp,
e2.eName Mgr
from employees e1
left join employees e2
on e1.mgr = e2.empid
The president in your sample data will return a null
value for the manager because they do not have a manager.
This exact question is answered on mySql workbench-faq:
Hover over an acronym to view a description, and see the Section 8.1.11.2, “The Columns Tab” and MySQL CREATE TABLE documentation for additional details.
That means hover over an acronym in the mySql Workbench table editor.
this works only if WebResponse is a HttpWebResponse.
try
{
...
}
catch (System.Net.WebException exc)
{
var webResponse = exc.Response as System.Net.HttpWebResponse;
if (webResponse != null &&
webResponse.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
MessageBox.Show("401");
}
else
throw;
}
From your situation it sounds like you need to create a "Revision#" folder once a day with a "Reports" folder in there. If that's the case, you just need to know what the next revision number is. Write a function that gets the next revision number, Get-NextRevisionNumber. Or you could do something like this:
foreach($Project in (Get-ChildItem "D:\TopDirec" -Directory)){
# Select all the Revision folders from the project folder.
$Revisions = Get-ChildItem "$($Project.Fullname)\Revision*" -Directory
# The next revision number is just going to be one more than the highest number.
# You need to cast the string in the first pipeline to an int so Sort-Object works.
# If you sort it descending the first number will be the biggest so you select that one.
# Once you have the highest revision number you just add one to it.
$NextRevision = ($Revisions.Name | Foreach-Object {[int]$_.Replace('Revision','')} | Sort-Object -Descending | Select-Object -First 1)+1
# Now in this we kill two birds with one stone.
# It will create the "Reports" folder but it also creates "Revision#" folder too.
New-Item -Path "$($Project.Fullname)\Revision$NextRevision\Reports" -Type Directory
# Move on to the next project folder.
# This untested example loop requires PowerShell version 3.0.
}
No, you'll have to specify the authentication method to use (typically "Basic") and the authentication realm. See http://en.wikipedia.org/wiki/Basic_access_authentication for an example request and response.
You might also want to read RFC 2617 - HTTP Authentication: Basic and Digest Access Authentication.
I don't recommend using 'urlArgs' for cache bursting with RequireJS. As this does not solves the problem fully. Updating a version no will result in downloading all the resources, even though you have just changes a single resource.
To handle this issue i recommend using Grunt modules like 'filerev' for creating revision no. On top of this i have written a custom task in Gruntfile to update the revision no wherever required.
If needed i can share the code snippet for this task.
Let's try to understand view by the following examples:
a=torch.range(1,16)
print(a)
tensor([ 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11., 12., 13., 14.,
15., 16.])
print(a.view(-1,2))
tensor([[ 1., 2.],
[ 3., 4.],
[ 5., 6.],
[ 7., 8.],
[ 9., 10.],
[11., 12.],
[13., 14.],
[15., 16.]])
print(a.view(2,-1,4)) #3d tensor
tensor([[[ 1., 2., 3., 4.],
[ 5., 6., 7., 8.]],
[[ 9., 10., 11., 12.],
[13., 14., 15., 16.]]])
print(a.view(2,-1,2))
tensor([[[ 1., 2.],
[ 3., 4.],
[ 5., 6.],
[ 7., 8.]],
[[ 9., 10.],
[11., 12.],
[13., 14.],
[15., 16.]]])
print(a.view(4,-1,2))
tensor([[[ 1., 2.],
[ 3., 4.]],
[[ 5., 6.],
[ 7., 8.]],
[[ 9., 10.],
[11., 12.]],
[[13., 14.],
[15., 16.]]])
-1 as an argument value is an easy way to compute the value of say x provided we know values of y, z or the other way round in case of 3d and for 2d again an easy way to compute the value of say x provided we know values of y or vice versa..
If you installed opencv 2.4.2 then you need to change the -lopencv_core240
to -lopencv_core242
I made the same mistake.
Here is a sample project for a soft keyboard.
https://developer.android.com/guide/topics/text/creating-input-method.html
Your's should be in the same lines with a different layout.
Edit: If you need the keyboard only in your application, its very simple! Create a linear layout with vertical orientation, and create 3 linear layouts inside it with horizontal orientation. Then place the buttons of each row in each of those horizontal linear layouts, and assign the weight property to the buttons. Use android:layout_weight=1 for all of them, so they get equally spaced.
This will solve. If you didn't get what was expected, please post the code here, and we are here to help you!
Function names should be lowercase, with words separated by underscores as necessary to improve readability. mixedCase is allowed only in contexts where that's already the prevailing style
Check out its already been answered, click here
Remove this line from your .gitconfig file located in the Windows' currently logged-in user folder:
[credential]
helper = !\"C:/Program Files (x86)/GitExtensions/GitCredentialWinStore/git-credential-winstore.exe\"
This worked for me and now when I push to remote it asks for my password again.
Breakpoints and especially conditional breakpoints are your friends.
Also you can write small assert like function which will check values and throw exceptions if needed in debug version of site (some variable is set to true or url has some parameter)
Swift version:
textLabel.adjustsFontSizeToFitWidth = true
textLabel.minimumScaleFactor = 0.5
Even without pop
the list we can do with set_index
pd.DataFrame(table).T.set_index(0).T
Out[11]:
0 Heading1 Heading2
1 1 2
2 3 4
Update from_records
table = [['Heading1', 'Heading2'], [1 , 2], [3, 4]]
pd.DataFrame.from_records(table[1:],columns=table[0])
Out[58]:
Heading1 Heading2
0 1 2
1 3 4
First check the list:-
git stash list
copy the index you wanted to pop from the stash list
git stash pop stash@{index_number}
eg.:
git stash pop stash@{1}
for (int i = 0; i < clbIncludes.Items.Count; i++)
if (clbIncludes.GetItemChecked(i))
// Do selected stuff
else
// Do unselected stuff
If the the check is in indeterminate state, this will still return true. You may want to replace
if (clbIncludes.GetItemChecked(i))
with
if (clbIncludes.GetItemCheckState(i) == CheckState.Checked)
if you want to only include actually checked items.
var data =" Retrieves a substring from this instance. The substring starts at a specified character position.";
var result = data.Split(new[] {'.'}, 1)[0];
Output:
Retrieves a substring from this instance. The substring starts at a specified character position.
So some days I lack brain cells and:
<android.support.v7.widget.SwitchCompat
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="@style/CustomSwitchStyle"/>
does not apply the theme because style is incorrect. I was supposed to use app:theme :P
<android.support.v7.widget.SwitchCompat
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:theme="@style/CustomSwitchStyle"/>
Whoopsies. This post was what gave me insight into my mistake...hopefully if someone stumbles across this it will help them like it did me. Thank you Gaëtan Maisse for your answer
Just use the existing method.. .ToList();
List<int> listArray = array.ToList();
KISS(KEEP IT SIMPLE SIR)
I started hosting as a service with pywin32.
Everything was well but I met the problem that service was not able to start within 30 seconds (default timeout for Windows) on system startup. It was critical for me because Windows startup took place simultaneous on several virtual machines hosted on one physical machine, and IO load was huge. Error messages were:
Error 1053: The service did not respond to the start or control request in a timely fashion.
Error 7009: Timeout (30000 milliseconds) waiting for the <ServiceName> service to connect.
I fought a lot with pywin, but ended up with using NSSM as it was proposed in this answer. It was very easy to migrate to it.
Tagname you should mentioned like that "option", if text with space we can use this method it should work.
WebElement select = driver.findElement(By.id("gender"));
List<WebElement> options = select.findElements(By.tagName("option"));
for (WebElement option : options) {
if("Germany".equals(option.getText().trim()))
option.click();
}
I'm trying to implement this but it's not working right. The page is posting back, but my code isn't getting executed. When i debug the page, the RaisePostBackEvent never gets fired. One thing i did differently is I'm doing this in a user control instead of an aspx page.
If anyone else is like Merk, and having trouble over coming this, I have a solution:
When you have a user control, it seems you must also create the PostBackEventHandler in the parent page. And then you can invoke the user control's PostBackEventHandler by calling it directly. See below:
public void RaisePostBackEvent(string _arg)
{
UserControlID.RaisePostBackEvent(_arg);
}
Where UserControlID is the ID you gave the user control on the parent page when you nested it in the mark up.
Note: You can also simply just call methods belonging to that user control directly (in which case, you would only need the RaisePostBackEvent handler in the parent page):
public void RaisePostBackEvent(string _arg)
{
UserControlID.method1();
UserControlID.method2();
}
Here is a modern connect_with_timeout
implementation, using poll
, with proper error and signal handling:
#include <sys/socket.h>
#include <fcntl.h>
#include <poll.h>
#include <time.h>
int connect_with_timeout(int sockfd, const struct sockaddr *addr, socklen_t addrlen, unsigned int timeout_ms) {
int rc = 0;
// Set O_NONBLOCK
int sockfd_flags_before;
if((sockfd_flags_before=fcntl(sockfd,F_GETFL,0)<0)) return -1;
if(fcntl(sockfd,F_SETFL,sockfd_flags_before | O_NONBLOCK)<0) return -1;
// Start connecting (asynchronously)
do {
if (connect(sockfd, addr, addrlen)<0) {
// Did connect return an error? If so, we'll fail.
if ((errno != EWOULDBLOCK) && (errno != EINPROGRESS)) {
rc = -1;
}
// Otherwise, we'll wait for it to complete.
else {
// Set a deadline timestamp 'timeout' ms from now (needed b/c poll can be interrupted)
struct timespec now;
if(clock_gettime(CLOCK_MONOTONIC, &now)<0) { rc=-1; break; }
struct timespec deadline = { .tv_sec = now.tv_sec,
.tv_nsec = now.tv_nsec + timeout_ms*1000000l};
// Wait for the connection to complete.
do {
// Calculate how long until the deadline
if(clock_gettime(CLOCK_MONOTONIC, &now)<0) { rc=-1; break; }
int ms_until_deadline = (int)( (deadline.tv_sec - now.tv_sec)*1000l
+ (deadline.tv_nsec - now.tv_nsec)/1000000l);
if(ms_until_deadline<0) { rc=0; break; }
// Wait for connect to complete (or for the timeout deadline)
struct pollfd pfds[] = { { .fd = sockfd, .events = POLLOUT } };
rc = poll(pfds, 1, ms_until_deadline);
// If poll 'succeeded', make sure it *really* succeeded
if(rc>0) {
int error = 0; socklen_t len = sizeof(error);
int retval = getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &error, &len);
if(retval==0) errno = error;
if(error!=0) rc=-1;
}
}
// If poll was interrupted, try again.
while(rc==-1 && errno==EINTR);
// Did poll timeout? If so, fail.
if(rc==0) {
errno = ETIMEDOUT;
rc=-1;
}
}
}
} while(0);
// Restore original O_NONBLOCK state
if(fcntl(sockfd,F_SETFL,sockfd_flags_before)<0) return -1;
// Success
return rc;
}
The simple way would be to disable the foreign key check; make the changes then re-enable foreign key check.
SET FOREIGN_KEY_CHECKS=0; -- to disable them
SET FOREIGN_KEY_CHECKS=1; -- to re-enable them
Just use git cherry
to pick all commits in the branch newFeature42
for example:
git cherry -v master newFeature42
Although Reed Copsey and Marc Gravell already described about IQueryable
(and also IEnumerable
) enough,mI want to add little more here by providing a small example on IQueryable
and IEnumerable
as many users asked for it
Example: I have created two table in database
CREATE TABLE [dbo].[Employee]([PersonId] [int] NOT NULL PRIMARY KEY,[Gender] [nchar](1) NOT NULL)
CREATE TABLE [dbo].[Person]([PersonId] [int] NOT NULL PRIMARY KEY,[FirstName] [nvarchar](50) NOT NULL,[LastName] [nvarchar](50) NOT NULL)
The Primary key(PersonId
) of table Employee
is also a forgein key(personid
) of table Person
Next i added ado.net entity model in my application and create below service class on that
public class SomeServiceClass
{
public IQueryable<Employee> GetEmployeeAndPersonDetailIQueryable(IEnumerable<int> employeesToCollect)
{
DemoIQueryableEntities db = new DemoIQueryableEntities();
var allDetails = from Employee e in db.Employees
join Person p in db.People on e.PersonId equals p.PersonId
where employeesToCollect.Contains(e.PersonId)
select e;
return allDetails;
}
public IEnumerable<Employee> GetEmployeeAndPersonDetailIEnumerable(IEnumerable<int> employeesToCollect)
{
DemoIQueryableEntities db = new DemoIQueryableEntities();
var allDetails = from Employee e in db.Employees
join Person p in db.People on e.PersonId equals p.PersonId
where employeesToCollect.Contains(e.PersonId)
select e;
return allDetails;
}
}
they contains same linq. It called in program.cs
as defined below
class Program
{
static void Main(string[] args)
{
SomeServiceClass s= new SomeServiceClass();
var employeesToCollect= new []{0,1,2,3};
//IQueryable execution part
var IQueryableList = s.GetEmployeeAndPersonDetailIQueryable(employeesToCollect).Where(i => i.Gender=="M");
foreach (var emp in IQueryableList)
{
System.Console.WriteLine("ID:{0}, EName:{1},Gender:{2}", emp.PersonId, emp.Person.FirstName, emp.Gender);
}
System.Console.WriteLine("IQueryable contain {0} row in result set", IQueryableList.Count());
//IEnumerable execution part
var IEnumerableList = s.GetEmployeeAndPersonDetailIEnumerable(employeesToCollect).Where(i => i.Gender == "M");
foreach (var emp in IEnumerableList)
{
System.Console.WriteLine("ID:{0}, EName:{1},Gender:{2}", emp.PersonId, emp.Person.FirstName, emp.Gender);
}
System.Console.WriteLine("IEnumerable contain {0} row in result set", IEnumerableList.Count());
Console.ReadKey();
}
}
The output is same for both obviously
ID:1, EName:Ken,Gender:M
ID:3, EName:Roberto,Gender:M
IQueryable contain 2 row in result set
ID:1, EName:Ken,Gender:M
ID:3, EName:Roberto,Gender:M
IEnumerable contain 2 row in result set
So the question is what/where is the difference? It does not seem to have any difference right? Really!!
Let's have a look on sql queries generated and executed by entity framwork 5 during these period
IQueryable execution part
--IQueryableQuery1
SELECT
[Extent1].[PersonId] AS [PersonId],
[Extent1].[Gender] AS [Gender]
FROM [dbo].[Employee] AS [Extent1]
WHERE ([Extent1].[PersonId] IN (0,1,2,3)) AND (N'M' = [Extent1].[Gender])
--IQueryableQuery2
SELECT
[GroupBy1].[A1] AS [C1]
FROM ( SELECT
COUNT(1) AS [A1]
FROM [dbo].[Employee] AS [Extent1]
WHERE ([Extent1].[PersonId] IN (0,1,2,3)) AND (N'M' = [Extent1].[Gender])
) AS [GroupBy1]
IEnumerable execution part
--IEnumerableQuery1
SELECT
[Extent1].[PersonId] AS [PersonId],
[Extent1].[Gender] AS [Gender]
FROM [dbo].[Employee] AS [Extent1]
WHERE [Extent1].[PersonId] IN (0,1,2,3)
--IEnumerableQuery2
SELECT
[Extent1].[PersonId] AS [PersonId],
[Extent1].[Gender] AS [Gender]
FROM [dbo].[Employee] AS [Extent1]
WHERE [Extent1].[PersonId] IN (0,1,2,3)
Common script for both execution part
/* these two query will execute for both IQueryable or IEnumerable to get details from Person table
Ignore these two queries here because it has nothing to do with IQueryable vs IEnumerable
--ICommonQuery1
exec sp_executesql N'SELECT
[Extent1].[PersonId] AS [PersonId],
[Extent1].[FirstName] AS [FirstName],
[Extent1].[LastName] AS [LastName]
FROM [dbo].[Person] AS [Extent1]
WHERE [Extent1].[PersonId] = @EntityKeyValue1',N'@EntityKeyValue1 int',@EntityKeyValue1=1
--ICommonQuery2
exec sp_executesql N'SELECT
[Extent1].[PersonId] AS [PersonId],
[Extent1].[FirstName] AS [FirstName],
[Extent1].[LastName] AS [LastName]
FROM [dbo].[Person] AS [Extent1]
WHERE [Extent1].[PersonId] = @EntityKeyValue1',N'@EntityKeyValue1 int',@EntityKeyValue1=3
*/
So you have few questions now, let me guess those and try to answer them
Why are different scripts generated for same result?
Lets find out some points here,
all queries has one common part
WHERE [Extent1].[PersonId] IN (0,1,2,3)
why? Because both function IQueryable<Employee> GetEmployeeAndPersonDetailIQueryable
and
IEnumerable<Employee> GetEmployeeAndPersonDetailIEnumerable
of SomeServiceClass
contains one common line in linq queries
where employeesToCollect.Contains(e.PersonId)
Than why is the
AND (N'M' = [Extent1].[Gender])
part is missing in IEnumerable
execution part, while in both function calling we used Where(i => i.Gender == "M") in
program.cs`
Now we are in the point where difference came between
IQueryable
andIEnumerable
What entity framwork does when an IQueryable
method called, it tooks linq statement written inside the method and try to find out if more linq expressions are defined on the resultset, it then gathers all linq queries defined until the result need to fetch and constructs more appropriate sql query to execute.
It provide a lots of benefits like,
like here in example sql server returned to application only two rows after IQueryable execution` but returned THREE rows for IEnumerable query why?
In case of IEnumerable
method, entity framework took linq statement written inside the method and constructs sql query when result need to fetch. it does not include rest linq part to constructs the sql query. Like here no filtering is done in sql server on column gender
.
But the outputs are same? Because 'IEnumerable filters the result further in application level after retrieving result from sql server
SO, what should someone choose?
I personally prefer to define function result as IQueryable<T>
because there are lots of benefit it has over IEnumerable
like, you could join two or more IQueryable functions, which generate more specific script to sql server.
Here in example you can see an IQueryable Query(IQueryableQuery2)
generates a more specific script than IEnumerable query(IEnumerableQuery2)
which is much more acceptable in my point of view.
So many questions here. I see at least two, maybe three:
*args
being used for?The first question is trivially answered in the Python Standard Library reference:
pop(key[, default])
If key is in the dictionary, remove it and return its value, else return default. If default is not given and key is not in the dictionary, a KeyError is raised.
The second question is covered in the Python Language Reference:
If the form “*identifier” is present, it is initialized to a tuple receiving any excess positional parameters, defaulting to the empty tuple. If the form “**identifier” is present, it is initialized to a new dictionary receiving any excess keyword arguments, defaulting to a new empty dictionary.
In other words, the pop
function takes at least two arguments. The first two get assigned the names self
and key
; and the rest are stuffed into a tuple called args
.
What's happening on the next line when *args
is passed along in the call to self.data.pop
is the inverse of this - the tuple *args
is expanded to of positional parameters which get passed along. This is explained in the Python Language Reference:
If the syntax *expression appears in the function call, expression must evaluate to a sequence. Elements from this sequence are treated as if they were additional positional arguments
In short, a.pop()
wants to be flexible and accept any number of positional parameters, so that it can pass this unknown number of positional parameters on to self.data.pop()
.
This gives you flexibility; data
happens to be a dict
right now, and so self.data.pop()
takes either one or two parameters; but if you changed data
to be a type which took 19 parameters for a call to self.data.pop()
you wouldn't have to change class a
at all. You'd still have to change any code that called a.pop()
to pass the required 19 parameters though.
Instead of below code:
$(this).attr("src").replace(urlRelative, urlAbsolute);
Use this:
$(this).attr("src",urlAbsolute);
C Interfaces and Implementations: Techniques for Creating Reusable Software, David R. Hanson
This book does an excellent job of covering your question. It's in the Addison Wesley Professional Computing series.
The basic paradigm is something like this:
/* for data structure foo */
FOO *myfoo;
myfoo = foo_create(...);
foo_something(myfoo, ...);
myfoo = foo_append(myfoo, ...);
foo_delete(myfoo);
The format specifers matter: "%s" says that the next string is a narrow string ("ascii" and typically 8 bits per character). "%S" means wide char string. Mixing the two will give "undefined behaviour", which includes printing garbage, just one character or nothing.
One character is printed because wide chars are, for example, 16 bits wide, and the first byte is non-zero, followed by a zero byte -> end of string in narrow strings. This depends on byte-order, in a "big endian" machine, you'd get no string at all, because the first byte is zero, and the next byte contains a non-zero value.
This is how it worked for me:
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("DELETE");
int responseCode = connection.getResponseCode();
For me the better approach is that:
s.split('mango', 1)[-1]
...because if happens that occurrence is not in the string you'll get "IndexError: list index out of range"
.
Therefore -1
will not get any harm cause number of occurrences is already set to one.
I assume you are using windows. Open the command prompt and type ipconfig
and find out your local address (on your pc) it should look something like 192.168.1.13
or 192.168.0.5
where the end digit is the one that changes. It should be next to IPv4 Address.
If your WAMP does not use virtual hosts the next step is to enter that IP address on your phones browser ie http://192.168.1.13
If you have a virtual host then you will need root to edit the hosts file.
If you want to test the responsiveness / mobile design of your website you can change your user agent in chrome or other browsers to mimic a mobile.
See http://googlesystem.blogspot.co.uk/2011/12/changing-user-agent-new-google-chrome.html.
Edit: Chrome dev tools now has a mobile debug tool where you can change the size of the viewport, spoof user agents, connections (4G, 3G etc).
If you get forbidden access then see this question WAMP error: Forbidden You don't have permission to access /phpmyadmin/ on this server. Basically, change the occurrances of deny,allow
to allow,deny
in the httpd.conf
file. You can access this by the WAMP menu.
To eliminate possible causes of the issue for now set your config file to
<Directory />
Options FollowSymLinks
AllowOverride All
Order allow,deny
Allow from all
<RequireAll>
Require all granted
</RequireAll>
</Directory>
As thatis working for my windows PC, if you have the directory config block as well change that also to allow all.
Config file that fixed the problem:
https://gist.github.com/samvaughton/6790739
Problem was that the /www apache directory config block still had deny set as default and only allowed from localhost.
I sorted this problem by verifying the json on JSONLint.com and then using Jackson. Below is the code for the same.
Main Class:-
String jsonStr = "[{\r\n" + " \"name\": \"John\",\r\n" + " \"city\": \"Berlin\",\r\n"
+ " \"cars\": [\r\n" + " \"FIAT\",\r\n" + " \"Toyata\"\r\n"
+ " ],\r\n" + " \"job\": \"Teacher\"\r\n" + " },\r\n" + " {\r\n"
+ " \"name\": \"Mark\",\r\n" + " \"city\": \"Oslo\",\r\n" + " \"cars\": [\r\n"
+ " \"VW\",\r\n" + " \"Toyata\"\r\n" + " ],\r\n"
+ " \"job\": \"Doctor\"\r\n" + " }\r\n" + "]";
ObjectMapper mapper = new ObjectMapper();
MyPojo jsonObj[] = mapper.readValue(jsonStr, MyPojo[].class);
for (MyPojo itr : jsonObj) {
System.out.println("Val of getName is: " + itr.getName());
System.out.println("Val of getCity is: " + itr.getCity());
System.out.println("Val of getJob is: " + itr.getJob());
System.out.println("Val of getCars is: " + itr.getCars() + "\n");
}
POJO:
public class MyPojo {
private List<String> cars = new ArrayList<String>();
private String name;
private String job;
private String city;
public List<String> getCars() {
return cars;
}
public void setCars(List<String> cars) {
this.cars = cars;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
} }
RESULT:-
Val of getName is: John
Val of getCity is: Berlin
Val of getJob is: Teacher
Val of getCars is: [FIAT, Toyata]
Val of getName is: Mark
Val of getCity is: Oslo
Val of getJob is: Doctor
Val of getCars is: [VW, Toyata]
You can reuse your confirm:
function doConfirm(body, $_nombrefuncion)
{ var param = undefined;
var $confirm = $("<div id='confirm' class='hide'></div>").dialog({
autoOpen: false,
buttons: {
Yes: function() {
param = true;
$_nombrefuncion(param);
$(this).dialog('close');
},
No: function() {
param = false;
$_nombrefuncion(param);
$(this).dialog('close');
}
}
});
$confirm.html("<h3>"+body+"<h3>");
$confirm.dialog('open');
};
// for this form just u must change or create a new function for to reuse the confirm
function resultadoconfirmresetVTyBFD(param){
$fecha = $("#asigfecha").val();
if(param ==true){
// DO THE CONFIRM
}
}
//Now just u must call the function doConfirm
doConfirm('body message',resultadoconfirmresetVTyBFD);
<script type="text/javascript">_x000D_
function validateForm() {_x000D_
var a = document.forms["Form"]["answer_a"].value;_x000D_
var b = document.forms["Form"]["answer_b"].value;_x000D_
var c = document.forms["Form"]["answer_c"].value;_x000D_
var d = document.forms["Form"]["answer_d"].value;_x000D_
if (a == null || a == "", b == null || b == "", c == null || c == "", d == null || d == "") {_x000D_
alert("Please Fill All Required Field");_x000D_
return false;_x000D_
}_x000D_
}_x000D_
</script>_x000D_
_x000D_
<form method="post" name="Form" onsubmit="return validateForm()" action="">_x000D_
<textarea cols="30" rows="2" name="answer_a" id="a"></textarea>_x000D_
<textarea cols="30" rows="2" name="answer_b" id="b"></textarea>_x000D_
<textarea cols="30" rows="2" name="answer_c" id="c"></textarea>_x000D_
<textarea cols="30" rows="2" name="answer_d" id="d"></textarea>_x000D_
</form>
_x000D_
Just put this in the header of your PHP Page and it ill work without API:
header('Access-Control-Allow-Origin: *'); //allow everybody
or
header('Access-Control-Allow-Origin: http://codesheet.org'); //allow just one domain
or
$http_origin = $_SERVER['HTTP_ORIGIN']; //allow multiple domains
$allowed_domains = array(
'http://codesheet.org',
'http://stackoverflow.com'
);
if (in_array($http_origin, $allowed_domains))
{
header("Access-Control-Allow-Origin: $http_origin");
}
mytable:
Value ColOne
--------------------
1 Cleo, Smith
The following should work if there aren't too many columns
ALTER TABLE mytable ADD ColTwo nvarchar(256);
UPDATE mytable SET ColTwo = LEFT(ColOne, Charindex(',', ColOne) - 1);
--'Cleo' = LEFT('Cleo, Smith', Charindex(',', 'Cleo, Smith') - 1)
UPDATE mytable SET ColTwo = REPLACE(ColOne, ColTwo + ',', '');
--' Smith' = REPLACE('Cleo, Smith', 'Cleo' + ',')
UPDATE mytable SET ColOne = REPLACE(ColOne, ',' + ColTwo, ''), ColTwo = LTRIM(ColTwo);
--'Cleo' = REPLACE('Cleo, Smith', ',' + ' Smith', '')
Result:
Value ColOne ColTwo
--------------------
1 Cleo Smith
Mark Longair's solution using git remote set-url...
is quite clear. You can also get the same behavior by directly editing this section of the .git/config file:
before:
[remote "origin"]
fetch = +refs/heads/*:refs/remotes/origin/*
url = git://github.com/my_user_name/my_repo.git
after:
[remote "origin"]
fetch = +refs/heads/*:refs/remotes/origin/*
url = [email protected]:my_user_name/my_repo.git
(And conversely, the git remote set-url...
invocation produces the above change.)
You can easily do this with the normal "Time" data type - just change the format!
Excels time/date format is simply 1.0 equals 1 full day (starting on 1/1/1900). So 36 hours would be 1.5. If you change the format to [h]:mm
, you'll see 36:00
.
Therefore, if you want to work with durations, you can simply use subtraction, e.g.
A1: Start: 36:00 (=1.5)
A2: End: 60:00 (=2.5)
A3: Duration: =A2-A1 24:00 (=1.0)
Currently the fastest implementation of md5 (based on Joseph Myers' code):
https://github.com/iReal/FastMD5
jsPerf comparaison: http://jsperf.com/md5-shootout/63
List
is an interface and ArrayList
is an implementation of the List interface. The ArrayList
class has only a few methods(i.e clone(), trimToSize(), removeRange() and ensureCapacity())
in addition to the methods available in the List interface. There is not much difference in this.
1. List<String> l = new ArrayList<>();
2. ArrayList<String> l = new ArrayList<>();
If you use the first, you will be able to call the methods available in the List interface and you cannot make calls to the new methods available in the ArrayList
class. Where as, you are free to use all the methods available in the ArrayList
if you use the second one.
I would say the first approach is a better one because, when you are developing java applications, when you are supposed to pass the collection framework objects as arguments to the methods, then it is better to go with first approach.
List<String> l = new ArrayList<>();
doSomething(l);
In future due to performance constraints, if you are changing the implementation to use LinkedList
or someother classes which implements List
interface, instead of ArrayList
, you need to change at one point only(the instantiation part).
List<String> l = new LinkedList<>();
Else you will be supposed to change at all the places, wherever, you have used the specific class implementation as method arguments.
Kafka 2.0 have the fix(KIP-278) for it:
kafka-topics.sh --version
Kakfa version check can be done with confluent
utility which comes by default with Confluent platform(confluent
utility can be added to cluster separately as well - credits cricket_007).
${confluent.home}/bin/confluent version kafka
Checking the version of other Confluent platform components like ksql schema-registry and connect
[confluent-4.1.0]$ ./bin/confluent version kafka
1.1.0-cp1
[confluent-4.1.0]$ ./bin/confluent version connect
4.1.0
[confluent-4.1.0]$ ./bin/confluent version schema-registry
4.1.0
[confluent-4.1.0]$ ./bin/confluent version ksql-server
4.1.0
Neither Glide nor Picasso is perfect. The way Glide loads an image to memory and do the caching is better than Picasso which let an image loaded far faster. In addition, it also helps preventing an app from popular OutOfMemoryError. GIF Animation loading is a killing feature provided by Glide. Anyway Picasso decodes an image with better quality than Glide.
Which one do I prefer? Although I use Picasso for such a very long time, I must admit that I now prefer Glide. But I would recommend you to change Bitmap Format to ARGB_8888 and let Glide cache both full-size image and resized one first. The rest would do your job great!
RGB_565
.+1 For Picasso Palette Helper.
There is a post that talk a lot about Picasso vs Glide post
Download the class.pdf2text.php @ https://pastebin.com/dvwySU1a or http://www.phpclasses.org/browse/file/31030.html (Registration required)
Code:
include('class.pdf2text.php');
$a = new PDF2Text();
$a->setFilename('filename.pdf');
$a->decodePDF();
echo $a->output();
class.pdf2text.php
Project Home
pdf2textclass
doesn't work with all the PDF's I've tested, If it doesn't work for you, try PDF Parser
Everything is much simpler, use git checkout for that.
Suppose you're on master
branch, to get app.js from new-feature
branch do:
git checkout new-feature path/to/app.js
// note that there is no leading slash in the path!
This will bring you the contents of the desired file. You can, as always, use part of sha1 instead of new-feature branch name to get the file as it was in that particular commit.
Note:new-feature
needs to be a local branch, not a remote one.
That's not possible.
The alternative is using reflection:
Class.forName("SomeClass").getMethod("someMethod").invoke(null);
You can try something like this:
Image logo = Image.GetInstance("pathToTheImage")
logo.ScaleAbsolute(500, 300)
document.querySelectorAll('input[type=search]').forEach(function (input) {
input.addEventListener('mouseup', function (e) {
if (input.value.length > 0) {
setTimeout(function () {
if (input.value.length === 0) {
//do reset action here
}
}, 5);
}
});
}
ECMASCRIPT 2016
Another good use for *args
and **kwargs
: you can define generic "catch all" functions, which is great for decorators where you return such a wrapper instead of the original function.
An example with a trivial caching decorator:
import pickle, functools
def cache(f):
_cache = {}
def wrapper(*args, **kwargs):
key = pickle.dumps((args, kwargs))
if key not in _cache:
_cache[key] = f(*args, **kwargs) # call the wrapped function, save in cache
return _cache[key] # read value from cache
functools.update_wrapper(wrapper, f) # update wrapper's metadata
return wrapper
import time
@cache
def foo(n):
time.sleep(2)
return n*2
foo(10) # first call with parameter 10, sleeps
foo(10) # returns immediately
As was pointed out above, it is primarily a tradeoff between storage and performance. At least in most cases.
However, there is at least one other factor that should be considered when choosing n/varchar(Max) over n/varchar(n). Is the data going to be indexed (such as, say, a last name)? Since the MAX definition is considered a LOB, then anything defined as MAX is not available for indexing. and without an index, any lookup involving the data as predicate in a WHERE clause is going to be forced into a Full Table scan, which is the worst performance you can get for data lookups.
When using row and column groups both, I had an issue where the colors would alternate between the columns even though it was the same row. I resolved this by using a global variable that alternates only when the row changes:
Public Dim BGColor As String = "#ffffff"
Function AlternateColor() As String
If BGColor = "#cccccc" Then
BGColor = "#ffffff"
Return "#cccccc"
Else
BGColor = "#cccccc"
Return "#ffffff"
End If
End Function
Now, in the first column of the row you want to alternate, set the color expression to:
=Code.AlternateColor()
-
In the remaining columns, set them all to:
=Code.BGColor
This should make the colors alternate only after the first column is drawn.
This may (unverifiably) improve performance, too, since it does not need to do a math computation for each column.
With the two previous steps stated above, you're still missing the foreign key constraint. This should work:
class AddUserReferenceToTester < ActiveRecord::Migration
def change
add_column :testers, :user_id, :integer, references: :users
end
end
Say it like this: struct xyx a;
According to the principle of separation:
Auditing data tables need to be separate from the main database. Because audit databases can have a lot of historical data, it makes sense from a memory utilization standpoint to keep them separate.
Do not use triggers to audit the whole database, because you will end up with a mess of different databases to support. You will have to write one for DB2, SQLServer, Mysql, etc.
I think converting the var to a string decreases the performance, at least this test performed in the latest browsers shows so.
So if you care about performance, I would, I'd use this:
typeof str === "string" || str instanceof String
for checking if the variable is a string (even if you use var str = new String("foo")
, str instanceof String
would return true).
As for checking if it's a number I would go for the native: isNaN
; function.
Your app is crashing at:
welcomePlayer.setText("Welcome Back, " + String.valueOf(mPlayer.getName(this)) + " !");
because mPlayer=null
.
You forgot to initialize Player mPlayer
in your PlayGame Activity.
mPlayer = new Player(context,"");
With the introduction of Data Classes in Python 3.7 we get very close.
The following example is similar to the NamedTuple example below, but the resulting object is mutable and it allows for default values.
from dataclasses import dataclass
@dataclass
class Point:
x: float
y: float
z: float = 0.0
p = Point(1.5, 2.5)
print(p) # Point(x=1.5, y=2.5, z=0.0)
This plays nicely with the new typing module in case you want to use more specific type annotations.
I've been waiting desperately for this! If you ask me, Data Classes and the new NamedTuple declaration, combined with the typing module are a godsend!
Since Python 3.6 it became quite simple and beautiful (IMHO), as long as you can live with immutability.
A new way of declaring NamedTuples was introduced, which allows for type annotations as well:
from typing import NamedTuple
class User(NamedTuple):
name: str
class MyStruct(NamedTuple):
foo: str
bar: int
baz: list
qux: User
my_item = MyStruct('foo', 0, ['baz'], User('peter'))
print(my_item) # MyStruct(foo='foo', bar=0, baz=['baz'], qux=User(name='peter'))
How about:
df['new_col'] = range(1, len(df) + 1)
Alternatively if you want the index to be the ranks and store the original index as a column:
df = df.reset_index()
I came across this question having found requests in Firefox were being blocked with the message:
Reason: CORS request did not succeed
After pulling my hair out I found out that a newly installed Firefox extension, Privacy Badger, was blocking the requests.
If you come to this question after scratching your head, try checking to see what extensions you have installed to see if any of them are blocking requests.
See Reason: CORS request did not succeed on MDN for details.
I've had a lot of problems trying to get Eclipse to accept as much memory as I'd like it to be able to use (between 2 and 4 gigs for example).
Open eclipse.ini
in the Eclipse installation directory.
You should be able to change the memory sizes after -vmargs
up to 1024 without a problem up to some maximum value that's dependent on your system. Here's that section on my Linux box:
-vmargs
-Dosgi.requiredJavaVersion=1.5
-XX:MaxPermSize=512m
-Xms512m
-Xmx1024m
And here's that section on my Windows box:
-vmargs
-Xms256m
-Xmx1024m
But, I've failed at setting it higher than 1024 megs. If anybody knows how to make that work, I'd love to know.
EDIT: 32bit version of juno seems to not accept more than Xmx1024m where the 64 bit version accept 2048.
EDIT: Nick's post contains some great links that explain two different things:
I have 8 gigs of Ram and can't set -Xmx
to more than 1024 megs of ram, even when a minimal amount of programs are loaded and both windows/linux report between 4 and 5 gigs of free ram.
Use scanf("%d",&rows)
instead of scanf("%s",input)
This allow you to get direcly the integer value from stdin without need to convert to int.
If the user enter a string containing a non numeric characters then you have to clean your stdin before the next scanf("%d",&rows)
.
your code could look like this:
#include <stdio.h>
#include <stdlib.h>
int clean_stdin()
{
while (getchar()!='\n');
return 1;
}
int main(void)
{
int rows =0;
char c;
do
{
printf("\nEnter an integer from 1 to 23: ");
} while (((scanf("%d%c", &rows, &c)!=2 || c!='\n') && clean_stdin()) || rows<1 || rows>23);
return 0;
}
Explanation
1)
scanf("%d%c", &rows, &c)
This means expecting from the user input an integer and close to it a non numeric character.
Example1: If the user enter aaddk
and then ENTER
, the scanf will return 0. Nothing capted
Example2: If the user enter 45
and then ENTER
, the scanf will return 2 (2 elements are capted). Here %d
is capting 45
and %c
is capting \n
Example3: If the user enter 45aaadd
and then ENTER
, the scanf will return 2 (2 elements are capted). Here %d
is capting 45
and %c
is capting a
2)
(scanf("%d%c", &rows, &c)!=2 || c!='\n')
In the example1: this condition is TRUE
because scanf return 0
(!=2
)
In the example2: this condition is FALSE
because scanf return 2
and c == '\n'
In the example3: this condition is TRUE
because scanf return 2
and c == 'a' (!='\n')
3)
((scanf("%d%c", &rows, &c)!=2 || c!='\n') && clean_stdin())
clean_stdin()
is always TRUE
because the function return always 1
In the example1: The (scanf("%d%c", &rows, &c)!=2 || c!='\n')
is TRUE
so the condition after the &&
should be checked so the clean_stdin()
will be executed and the whole condition is TRUE
In the example2: The (scanf("%d%c", &rows, &c)!=2 || c!='\n')
is FALSE
so the condition after the &&
will not checked (because what ever its result is the whole condition will be FALSE
) so the clean_stdin()
will not be executed and the whole condition is FALSE
In the example3: The (scanf("%d%c", &rows, &c)!=2 || c!='\n')
is TRUE
so the condition after the &&
should be checked so the clean_stdin()
will be executed and the whole condition is TRUE
So you can remark that clean_stdin()
will be executed only if the user enter a string containing non numeric character.
And this condition ((scanf("%d%c", &rows, &c)!=2 || c!='\n') && clean_stdin())
will return FALSE
only if the user enter an integer
and nothing else
And if the condition ((scanf("%d%c", &rows, &c)!=2 || c!='\n') && clean_stdin())
is FALSE
and the integer
is between and 1
and 23
then the while
loop will break else the while
loop will continue
Every time you rollback you get the last batch of migration. use the command
php artisan migrate:rollback --step=1
Suppose we have a generator:
def gen():
for i in range(10):
yield i
We can wrap the generator, along with the known length, in an object:
import itertools
class LenGen(object):
def __init__(self,gen,length):
self.gen=gen
self.length=length
def __call__(self):
return itertools.islice(self.gen(),self.length)
def __len__(self):
return self.length
lgen=LenGen(gen,10)
Instances of LenGen
are generators themselves, since calling them returns an iterator.
Now we can use the lgen
generator in place of gen
, and access len(lgen)
as well:
def new_gen():
for i in lgen():
yield float(i)/len(lgen)
for i in new_gen():
print(i)
You can find the DMGs or XIPs for Xcode and other development tools on https://developer.apple.com/download/more/ (requires Apple ID to login).
You must login to have a valid session before downloading anything below.
*(Newest on top. For each minor version (6.3, 5.1, etc.) only the latest revision is kept in the list.)
*With Xcode 12.2, Apple introduces the term “Release Candidate” (RC) which replaces “GM seed” and indicates this version is near final.
Xcode 12
12.4 (requires a Mac with Apple silicon running macOS Big Sur 11 or later, or an Intel-based Mac running macOS Catalina 10.15.4 or later) (Latest as of 27-Jan-2021)
12.3 (requires a Mac with Apple silicon running macOS Big Sur 11 or later, or an Intel-based Mac running macOS Catalina 10.15.4 or later)
12.0.1 (Requires macOS 10.15.4 or later) (Latest as of 24-Sept-2020)
Xcode 11
11.7 (Latest as of Sept 02 2020)
11.4.1 (Requires macOS 10.15.2 or later)
11 (Requires macOS 10.14.4 or later)
Xcode 10 (unsupported for iTunes Connect)
Xcode 9
Xcode 8
Xcode 7
Xcode 6
Even Older Versions (unsupported for iTunes Connect)
Below is the simplest way
Try the code
ALTER TRIGGER trigger_name DISABLE
That's it :)
I got a similar issue. My solution was to change minus character from:
—
to
-
You can only have one primary key, but you can have multiple columns in your primary key.
You can also have Unique Indexes on your table, which will work a bit like a primary key in that they will enforce unique values, and will speed up querying of those values.
Also, a bit simpler....
>> hash = { "a"=>["a", "b", "c"], "b"=>["b", "c"] }
=> {"a"=>["a", "b", "c"], "b"=>["b", "c"]}
>> hash.values
=> [["a", "b", "c"], ["b", "c"]]
With Android's Navigation component, this problem, when you have nested Fragments, could feel like an unsolvable mystery.
Based on knowledge and inspiration from the following answers in this post, I managed to make up a simple solution that works:
In your activity's onActivityResult()
, you can loop through the active Fragments list that you get using the FragmentManager
's getFragments()
method.
Please note that for you to do this, you need to be using the getSupportFragmentManager()
or targeting API 26 and above.
The idea here is to loop through the list checking the instance type of each Fragment in the list, using instanceof
.
While looping through this list of type Fragment
is ideal, unfortunately, when you're using the Android Navigation Component, the list will only have one item, i.e. NavHostFragment
.
So now what? We need to get Fragments known to the NavHostFragment
. NavHostFragment
in itself is a Fragment. So using getChildFragmentManager().getFragments()
, we once again get a List<Fragment>
of Fragments known to our NavHostFragment
. We loop through that list checking the instanceof
each Fragment.
Once we find our Fragment of interest in the list, we call its onActivityResult()
, passing to it all the parameters that the Activity's onActivityResult()
declares.
// Your activity's onActivityResult()_x000D_
_x000D_
@Override_x000D_
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {_x000D_
super.onActivityResult(requestCode, resultCode, data);_x000D_
_x000D_
List<Fragment> lsActiveFragments = getSupportFragmentManager().getFragments();_x000D_
for (Fragment fragmentActive : lsActiveFragments) {_x000D_
_x000D_
if (fragmentActive instanceof NavHostFragment) {_x000D_
_x000D_
List<Fragment> lsActiveSubFragments = fragmentActive.getChildFragmentManager().getFragments();_x000D_
for (Fragment fragmentActiveSub : lsActiveSubFragments) {_x000D_
_x000D_
if (fragmentActiveSub instanceof FragWeAreInterestedIn) {_x000D_
fragmentActiveSub.onActivityResult(requestCode, resultCode, data);_x000D_
}_x000D_
_x000D_
}_x000D_
_x000D_
}_x000D_
_x000D_
}_x000D_
_x000D_
}
_x000D_
strstr(request, "favicon") != NULL
Just spent 4 hours tracking down a similar problem in a WSDL. Turns out the WSDL used an XSD which imports another namespace XSD. This imported XSD contained the following:
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.xyz.com/Services/CommonTypes" elementFormDefault="qualified"
xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:CommonTypes="http://www.xyz.com/Services/CommonTypes">
<include schemaLocation=""></include>
<complexType name="RequestType">
<....
Note the empty include
element! This was the root of my woes. I guess this is a variation on Egor's file not found problem above.
+1 to disappointing error reporting.
You can use reversed() method for easily reverse values.
var i:Int
for i in 1..10.reversed() {
print(i)
}
The reversed() method reverse the values.
This worked for me in angular >= 6.x versions:
this.router.events
.subscribe((event) => {
if (event instanceof NavigationStart) {
window.localStorage.setItem('previousUrl', this.router.url);
}
});
I'm using Argos reporting system as a front end and Oracle in back. I just encountered this error and it was caused by a string with a double quote at the start and a single quote at the end. Replacing the double quote with a single solved the issue.
Using higher-order functions (note: I'm using inline anonymous functions, which appeared in PHP 5.3):
function array_flatten($array) {
return array_reduce(
$array,
function($prev, $element) {
if (!is_array($element))
$prev[] = $element;
else
$prev = array_merge($prev, array_flatten($element));
return $prev;
},
array()
);
}
If you're still a bit confused about virtualenv
you might not pick up how to combine the great tips from the answers by Ioannis and Sascha. I.e. this is the basic command you need:
/YOUR_ENV/bin/pip freeze --local
That can be easily used elsewhere. E.g. here is a convenient and complete answer, suited for getting all the local packages installed in all the environments you set up via virtualenvwrapper:
cd ${WORKON_HOME:-~/.virtualenvs}
for dir in *; do [ -d $dir ] && $dir/bin/pip freeze --local > /tmp/$dir.fl; done
more /tmp/*.fl
By just adding an empty commit will fix issue by using
$ git commit -m "empty commit" --allow-empty
$ git push
// above make empty commit without edit then push
I had the same problem however, with a Jenkins installation. The response back from trying to clone was always:
stderr: fatal: unable to access 'https://my.gitlab.server/group/repo.git/': Empty reply from server
Unfortunately switching to http wasn't an option, so I needed the root cause. Turns out there was a http setting in the global config for the Jenkins user (likely added when we were running a self-signed cert on out gitlab instance). Taking look at the global config:
$ git config --global -l
http.sslverify=false
Removing this did the trick
$ git config --global --unset http.sslverify
(It also looks like this is a typo, with the correct key http.sslVerify
)
I had the same problem, on Windows7.
I was getting error 2147942667 and a report of being unable to run c:\windows\system32\CMD.EXE. I tried with and without double quotes in the Script and Start-in and it made no difference. Then I tried replacing all path references to mapped network drives and with UNC references (\Server1\Sharexx\my_scripts\run_this.cmd) and that fixed it for me. Pat.
it works
first use: git reflog
find your SHA of your previus state and make (HEAD@{1} is an example)
git reset --hard HEAD@{1}
Not sure whether you still have this issue. I had a similar issue and I was able to resolve it simply by unsetting PYTHONPATH
$ unset PYTHONPATH
This example shows how to go directly to the Windows API and not link in the C Standard Library.
global _main
extern _GetStdHandle@4
extern _WriteFile@20
extern _ExitProcess@4
section .text
_main:
; DWORD bytes;
mov ebp, esp
sub esp, 4
; hStdOut = GetstdHandle( STD_OUTPUT_HANDLE)
push -11
call _GetStdHandle@4
mov ebx, eax
; WriteFile( hstdOut, message, length(message), &bytes, 0);
push 0
lea eax, [ebp-4]
push eax
push (message_end - message)
push message
push ebx
call _WriteFile@20
; ExitProcess(0)
push 0
call _ExitProcess@4
; never here
hlt
message:
db 'Hello, World', 10
message_end:
To compile, you'll need NASM and LINK.EXE (from Visual studio Standard Edition)
nasm -fwin32 hello.asm link /subsystem:console /nodefaultlib /entry:main hello.obj
From DateTime on msdn:
Type: System.DateTime% When this method returns, contains the DateTime value equivalent to the date and time contained in s, if the conversion succeeded, or MinValue if the conversion failed. The conversion fails if the s parameter is null, is an empty string (""), or does not contain a valid string representation of a date and time. This parameter is passed uninitialized.
Use parseexact with the format string "yyyy-dd-MM hh:mm tt"
instead.
You may not be able to directly do this, but the Xajax library is pretty close to what you want. I will demonstrate with an example. Here's a button on a webpage:
<button onclick="xajax_addCity();">Add New City</button>
Our intuitive guess would be that xajax_addCity()
is a Javascript function, right? Well, right and wrong. The cool thing Xajax allows is that we don't have any JS function called xajax_addCity()
, but what we do have is a PHP function called addCity()
that can do whatever PHP does!
<?php function addCity() { echo "Wow!"; } ?>
Think about it for a minute. We are virtually invoking a PHP function from Javascript code! That over-simplified example was just to whet the appetite, a better explanation is on the Xajax site, have fun!
I use this:
private void MainForm_Load(object sender, EventArgs e)
{
if (Settings.Instance.HideAtStartup)
{
BeginInvoke(new MethodInvoker(delegate
{
Hide();
}));
}
}
Obviously you have to change the if condition with yours.
To get employee names starting with A or B listed in order...
select employee_name
from employees
where employee_name LIKE 'A%' OR employee_name LIKE 'B%'
order by employee_name
If you are using Microsoft SQL Server you could use
....
where employee_name LIKE '[A-B]%'
order by employee_name
This is not standard SQL though it just gets translated to the following which is.
WHERE employee_name >= 'A'
AND employee_name < 'C'
For all variants you would need to consider whether you want to include accented variants such as Á
and test whether the queries above do what you want with these on your RDBMS and collation options.
A .
in regex is a metacharacter, it is used to match any character. To match a literal dot, you need to escape it, so \.
Generally, FileMode.Create
is what you're looking for.
There's two problems here.
1. Get the date as a string
This is pretty easy. Just use the date
command with the +
option. We can use backticks to capture the value in a variable.
$ DATE=`date +%d-%m-%y`
You can change the date format by using different %
options as detailed on the date man page.
2. Split a file into name and extension.
This is a bit trickier. If we think they'll be only one .
in the filename we can use cut
with .
as the delimiter.
$ NAME=`echo $FILE | cut -d. -f1
$ EXT=`echo $FILE | cut -d. -f2`
However, this won't work with multiple .
in the file name. If we're using bash
- which you probably are - we can use some bash magic that allows us to match patterns when we do variable expansion:
$ NAME=${FILE%.*}
$ EXT=${FILE#*.}
Putting them together we get:
$ FILE=somefile.txt
$ NAME=${FILE%.*}
$ EXT=${FILE#*.}
$ DATE=`date +%d-%m-%y`
$ NEWFILE=${NAME}_${DATE}.${EXT}
$ echo $NEWFILE
somefile_25-11-09.txt
And if we're less worried about readability we do all the work on one line (with a different date format):
$ FILE=somefile.txt
$ FILE=${FILE%.*}_`date +%d%b%y`.${FILE#*.}
$ echo $FILE
somefile_25Nov09.txt
echo json_encode($array); //outputs---> "name1":"value1", "name2":"value2", ...
OR
echo print_r($array, true);
To populate the array:
int[] numbers = new int[100];
for (int i = 0; i < 100; i++) {
numbers[i] = i+1;
}
and then to sum it:
int ans = 0;
for (int i = 0; i < numbers.length; i++) {
ans += numbers[i];
}
or in short, if you want the sum from 1 to n:
( n ( n +1) ) / 2
Don't forget nullability.
ALTER TABLE <schemaName>.<tableName>
ALTER COLUMN <columnName> nvarchar(200) [NULL|NOT NULL]
Use the following query to see which rows have changes:
(select * from inserted) except (select * from deleted)
The results of this query should consist of all the new records that are different from the old ones.
I have some general thoughts about the implementation of Task
:
using
.ConfigureAwait
was introduced in 4.5. Task
was introduced in 4.0. Task.ContinueWith
they do not b/c it was realised context switch is expensive and it is turned off by default.I have got a few posts on the subject but my take - in addition to Tugberk's nice answer - is that you should turn all APIs asynchronous and ideally flow the context . Since you are doing async, you can simply use continuations instead of waiting so no deadlock will be cause since no wait is done in the library and you keep the flowing so the context is preserved (such as HttpContext).
Problem is when a library exposes a synchronous API but uses another asynchronous API - hence you need to use Wait()
/Result
in your code.
function appendTaskOnStack(task, ms, loop) {
window.nextTaskAfter = (window.nextTaskAfter || 0) + ms;
if (!loop) {
setTimeout(function() {
appendTaskOnStack(task, ms, true);
}, window.nextTaskAfter);
}
else {
if (task)
task.apply(Array(arguments).slice(3,));
window.nextTaskAfter = 0;
}
}
for (var n=0; n < 10; n++) {
appendTaskOnStack(function(){
console.log(n)
}, 100);
}
Try update your Eclipse with the newest Maven repository as follows:
If you need to increase MySQL Connections without MySQL restart do like below
mysql> show variables like 'max_connections';
+-----------------+-------+
| Variable_name | Value |
+-----------------+-------+
| max_connections | 100 |
+-----------------+-------+
1 row in set (0.00 sec)
mysql> SET GLOBAL max_connections = 150;
Query OK, 0 rows affected (0.00 sec)
mysql> show variables like 'max_connections';
+-----------------+-------+
| Variable_name | Value |
+-----------------+-------+
| max_connections | 150 |
+-----------------+-------+
1 row in set (0.00 sec)
These settings will change at MySQL Restart.
For permanent changes add below line in my.cnf and restart MySQL
max_connections = 150
You can do it using Primefaces like this :
<p:button
outcome="/page2.xhtml?faces-redirect=true&id=#{myBean.id}">
</p:button>
I noticed no one has mentioned achieving this through environment variables (CI/CD friendly).
export PLAY_HTTP_PORT=1234
export PLAY_HTTPS_PORT=1235
Once set, Play will read from those environment variables to determine the port when doing sbt run
, sbt start
, or when running the executable for prod deployment. See the docs for more.
May be it's good if you define your background-image in the :after
pseudo class. Write like this:
.parent{
width:300px;
height:300px;
position:relative;
border:1px solid red;
}
.parent:after{
content:'';
background:url('http://www.dummyimage.com/300x300/000/fff&text=parent+image');
width:300px;
height:300px;
position:absolute;
top:0;
left:0;
opacity:0.5;
}
.child{
background:yellow;
position:relative;
z-index:1;
}
Check this fiddle
Refer https://docs.python.org/2/tutorial/controlflow.html#unpacking-argument-lists
dt = datetime.datetime(*t[:7])
Xamarin port of Felix's answer
In your MainActivity
, add this (docs: Android.App.IntentFilterAttribute Class):
....
[IntentFilter(new[] {
Intent.ActionView },
Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable },
DataScheme = "my.special.scheme")
]
public class MainActivity : Activity
{
....
Xamarin will add following in the AndroidManifest.xml
for you:
<activity
android:label="Something"
android:screenOrientation="portrait"
android:theme="@style/MyTheme"
android:name="blah.MainActivity">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="my.special.scheme" />
</intent-filter>
</activity>
And in order to get params (I tested in OnCreate of MainActivity):
var data = Intent.Data;
if (data != null)
{
var scheme = data.Scheme;
var host = data.Host;
var args = data.PathSegments;
if (args.Count > 0)
{
var first = args[0];
var second = args[1];
...
}
}
As far as I know, above can be added in any activity, not only MainActivity
Notes:
OnCreate
event of app's MainLauncher Activity
will be fired again.<a href="my.special.scheme://host/arg1/arg2">
, in above last code snippet values will be:scheme: my.special.scheme
host: host
args: ["arg1", "arg2"]
first: arg1
second: arg2
Update: if android creates new instance of your app, you should add android:launchMode="singleTask"
too.
Mainly, you've got 2 major problems:
You are using adding a List
of String
s. You want a List
containing List
s of Strings
.
Note as well that when you invoke this:
NodeList.addAll(nodes);
... all you say is to add all elements of nodes (which is a list of Strings) to the (badly named) NodeList
, which is using Objects and thus adds only the strings inside. Which leads me to the next point.
You seem to be confused between your nodes
and NodeList
. Your NodeList
keeps growing over time, and that's what you add to your list.
So, even if doing things right, if we were to look at the end of each iteration at your nodes
, nodeList
and list
, we'd see:
i = 0
nodes: [PropertyStart,a,b,c,PropertyEnd]
nodeList: [PropertyStart,a,b,c,PropertyEnd]
list: [[PropertyStart,a,b,c,PropertyEnd]]
i = 1
nodes: [PropertyStart,d,e,f,PropertyEnd]
nodeList: [PropertyStart,a,b,c,PropertyEnd, PropertyStart,d,e,f,PropertyEnd]
list: [[PropertyStart,a,b,c,PropertyEnd],[PropertyStart,a,b,c,PropertyEnd, PropertyStart,d,e,f,PropertyEnd]]
i = 2
nodes: [PropertyStart,g,h,i,PropertyEnd]
nodeList: [PropertyStart,a,b,c,PropertyEnd,PropertyStart,d,e,f,PropertyEnd,PropertyStart,g,h,i,PropertyEnd]
list: [[PropertyStart,a,b,c,PropertyEnd],[PropertyStart,a,b,c,PropertyEnd, PropertyStart,d,e,f,PropertyEnd],[PropertyStart,a,b,c,PropertyEnd,PropertyStart,d,e,f,PropertyEnd,PropertyStart,g,h,i,PropertyEnd]]
and so on...
Don't use variable names starting with uppercase letters. So here, replace NodeList
with nodeList
).
You say "I want the "list" array [...]". This is confusing for whoever you will be communicating with: It's not an array. It's an implementation of List
backed by an array.
There's a difference between a type, an interface, and an implementation.
Use generic types, because static typing really helps with these errors. Also, use interfaces where possible, except if you have a good reason to use the concrete type.
So your code becomes:
List<String> nodes = new ArrayList<String>();
List<String> nodeList = new ArrayList<String>();
List<List<String>> list = new ArrayList<List<String>>();
You could do away with the nodeList
entirely, and write the following once you've fixed your types:
list.add(nodes);
Except if you have a very strong reason to do so, prefer to use the inner-most scope to declare variables and limit both their lifespan for their references and facilitate the separation of concerns in your code.
Here you could then move List<String> nodes
to be declared within the loop (and then forget the nodes.clear()
invocation).
A reason not to do this could be performance, as you might want to avoid recreating an ArrayList
on each iteration of the loop, but it's very unlikely that's a concern to you (and clean, readable and maintainable code has priority over pre-optimized code).
Last but not least, if you want help give us the exact reproducible case with a short, self-Contained, correct example.
Here you give us your program's outputs, but don't mention how you got them, so we're left to assume you did a System.out.println(list)
. And you confused a lot of people, as I think the output you give us is not what you actually got.
Yes. You'd use the urllib2
module, and encode using the multipart/form-data
content type. Here is some sample code to get you started -- it's a bit more than just file uploading, but you should be able to read through it and see how it works:
user_agent = "image uploader"
default_message = "Image $current of $total"
import logging
import os
from os.path import abspath, isabs, isdir, isfile, join
import random
import string
import sys
import mimetypes
import urllib2
import httplib
import time
import re
def random_string (length):
return ''.join (random.choice (string.letters) for ii in range (length + 1))
def encode_multipart_data (data, files):
boundary = random_string (30)
def get_content_type (filename):
return mimetypes.guess_type (filename)[0] or 'application/octet-stream'
def encode_field (field_name):
return ('--' + boundary,
'Content-Disposition: form-data; name="%s"' % field_name,
'', str (data [field_name]))
def encode_file (field_name):
filename = files [field_name]
return ('--' + boundary,
'Content-Disposition: form-data; name="%s"; filename="%s"' % (field_name, filename),
'Content-Type: %s' % get_content_type(filename),
'', open (filename, 'rb').read ())
lines = []
for name in data:
lines.extend (encode_field (name))
for name in files:
lines.extend (encode_file (name))
lines.extend (('--%s--' % boundary, ''))
body = '\r\n'.join (lines)
headers = {'content-type': 'multipart/form-data; boundary=' + boundary,
'content-length': str (len (body))}
return body, headers
def send_post (url, data, files):
req = urllib2.Request (url)
connection = httplib.HTTPConnection (req.get_host ())
connection.request ('POST', req.get_selector (),
*encode_multipart_data (data, files))
response = connection.getresponse ()
logging.debug ('response = %s', response.read ())
logging.debug ('Code: %s %s', response.status, response.reason)
def make_upload_file (server, thread, delay = 15, message = None,
username = None, email = None, password = None):
delay = max (int (delay or '0'), 15)
def upload_file (path, current, total):
assert isabs (path)
assert isfile (path)
logging.debug ('Uploading %r to %r', path, server)
message_template = string.Template (message or default_message)
data = {'MAX_FILE_SIZE': '3145728',
'sub': '',
'mode': 'regist',
'com': message_template.safe_substitute (current = current, total = total),
'resto': thread,
'name': username or '',
'email': email or '',
'pwd': password or random_string (20),}
files = {'upfile': path}
send_post (server, data, files)
logging.info ('Uploaded %r', path)
rand_delay = random.randint (delay, delay + 5)
logging.debug ('Sleeping for %.2f seconds------------------------------\n\n', rand_delay)
time.sleep (rand_delay)
return upload_file
def upload_directory (path, upload_file):
assert isabs (path)
assert isdir (path)
matching_filenames = []
file_matcher = re.compile (r'\.(?:jpe?g|gif|png)$', re.IGNORECASE)
for dirpath, dirnames, filenames in os.walk (path):
for name in filenames:
file_path = join (dirpath, name)
logging.debug ('Testing file_path %r', file_path)
if file_matcher.search (file_path):
matching_filenames.append (file_path)
else:
logging.info ('Ignoring non-image file %r', path)
total_count = len (matching_filenames)
for index, file_path in enumerate (matching_filenames):
upload_file (file_path, index + 1, total_count)
def run_upload (options, paths):
upload_file = make_upload_file (**options)
for arg in paths:
path = abspath (arg)
if isdir (path):
upload_directory (path, upload_file)
elif isfile (path):
upload_file (path)
else:
logging.error ('No such path: %r' % path)
logging.info ('Done!')
I find myself a tad amazed at the lack of what I consider the best answer to this question anywhere on the internet. I struggled for many years to find the answer. Many answers online come close, but none really answer it. The real answer is
(cmd & echo.) >2 & (set /p =)<2
The "secret sauce" being the "closely guarded coveted secret" that "echo." sends a CR/LF (ENTER/new line/0x0D0A). Otherwise, what I am doing here is redirecting the output of the first command to the standard error stream. I then redirect the standard error stream into the standard input stream for the "set /p =" command.
Example:
(echo foo & echo.) >2 & (set /p bar=)<2
This is a classic case of rebase --onto
:
# let's go to current master (X, where quickfix2 should begin)
git checkout master
# replay every commit *after* quickfix1 up to quickfix2 HEAD.
git rebase --onto master quickfix1 quickfix2
So you should go from
o-o-X (master HEAD)
\
q1a--q1b (quickfix1 HEAD)
\
q2a--q2b (quickfix2 HEAD)
to:
q2a'--q2b' (new quickfix2 HEAD)
/
o-o-X (master HEAD)
\
q1a--q1b (quickfix1 HEAD)
This is best done on a clean working tree.
See git config --global rebase.autostash true
, especially after Git 2.10.
You can do this by using Apace common lang package (org.apache.commons.lang.ArrayUtils
class ). You need to do the following
byte[] concatBytes = ArrayUtils.addAll(one,two);
An array has a fixed length. You cannot 'add' to it. You define at the start how long it will be.
int[] num = new int[5];
This creates an array of integers which has 5 'buckets'. Each bucket contains 1 integer. To begin with these will all be 0
.
num[0] = 1;
num[1] = 2;
The two lines above set the first and second values of the array to 1
and 2
. Now your array looks like this:
[1,2,0,0,0]
As you can see you set values in it, you don't add them to the end.
If you want to be able to create a list of numbers which you add to, you should use ArrayList.
Reload sdk maybe the problem is solved
Use This as the solution
This worked for me perfectly..
<div align="center">
<img src="">
</div>
Step 1 :
C:/(path to php folder)/php.ini
enable extension=php_curl.dll
(remove the ;
at the end of the line)
Step 2 :
Add this to Apache/conf/httpd.conf
(libeay32.dll, ssleay32.dll, libssh2.dll find directly in php7 folder)
# load curl and open ssl libraries
LoadFile "C:/(path to php folder)/libeay32.dll"
LoadFile "C:/(path to php folder)/ssleay32.dll"
LoadFile "C:/(path to php folder)/libssh2.dll"
Try replacing apt-get
with yum
as Amazon Linux based AMI uses the yum
command instead of apt-get
.
Say you have multiple jar files a.jar,b.jar and c.jar. To add them to classpath while compiling you need to do
$javac -cp .:a.jar:b.jar:c.jar HelloWorld.java
To run do
$java -cp .:a.jar:b.jar:c.jar HelloWorld
Yes there is a way to do it.
First declare a class.
//anyfile.ts
export class Custom
{
name: string,
empoloyeeID: number
}
Then in your component import the class
import {Custom} from '../path/to/anyfile.ts'
.....
export class FormComponent implements OnInit {
name: string;
empoloyeeID : number;
empList: Array<Custom> = [];
constructor() {
}
ngOnInit() {
}
onEmpCreate(){
//console.log(this.name,this.empoloyeeID);
let customObj = new Custom();
customObj.name = "something";
customObj.employeeId = 12;
this.empList.push(customObj);
this.name ="";
this.empoloyeeID = 0;
}
}
Another way would be to interfaces read the documentation once - https://www.typescriptlang.org/docs/handbook/interfaces.html
Also checkout this question, it is very interesting - When to use Interface and Model in TypeScript / Angular2
timeout
is a command - so it is executing in a subprocess of your bash shell. Therefore it has no access to your functions defined in your current shell.
The command timeout
is given is executed as a subprocess of timeout - a grand-child process of your shell.
You might be confused because echo
is both a shell built-in and a separate command.
What you can do is put your function in it's own script file, chmod it to be executable, then execute it with timeout
.
Alternatively fork, executing your function in a sub-shell - and in the original process, monitor the progress, killing the subprocess if it takes too long.
the Conda Package Manager is almost ready for beta testing, but it will not be fully integrated until the release of Spyder 2.4 (https://github.com/spyder-ide/spyder/wiki/Roadmap). As soon as we have it ready for testing we will post something on the mailing list (https://groups.google.com/forum/#!forum/spyderlib). Be sure to subscribe
Cheers!
When using in Maven, update artifact junit:junit from e.g. 4.8.2 to 4.11.
git reset --hard HEAD~1
git push -f <remote> <branch>
(Example push: git push -f origin bugfix/bug123
)
This will undo the last commit and push the updated history to the remote. You need to pass the -f
because you're replacing upstream history in the remote.
Maybe you should try removing "new" keyword and see if works.
Because last time I got this error when I tried creating Typeface
something like this:
Typeface typeface = new Typeface().create("Arial",Typeface.BOLD);
Look at the user and host column of your permission. Where you are coming from localhost or some other IPs do make a difference.
Node supports waiting natively:
const sleep = (waitTimeInMs) => new Promise(resolve => setTimeout(resolve, waitTimeInMs));
then if you can use async functions:
await sleep(10000); // sleep for 10 seconds
or:
sleep(10000).then(() => {
// This will execute 10 seconds from now
});
I wanted an asynchronous sleep that worked in Windows & Linux, without hogging my CPU with a long while loop. I tried the sleep package but it wouldn't install on my Windows box. I ended up using:
https://www.npmjs.com/package/system-sleep
To install it, type:
npm install system-sleep
In your code,
var sleep = require('system-sleep');
sleep(10*1000); // sleep for 10 seconds
Works like a charm.
I figured this might come in handy for others as well :
find:
([A-Z])(.*)
replace:
\L$1$2
--> will convert all letters in $1
and $2
to lowercase\l$1$2
--> will only convert the first letter of $1
to lowercase and leave everything else as isThe same goes for uppercase with \U
and \u
You can also try this way
<option id="opt7" class='select_continent' data-value='7'>Antarctica</option>
jquery
$('.select_continent').click(function () {
alert($(this).data('value'));
});
Good luck !!!!
there are three ways you can use: the RETURN value, and OUTPUT parameter and a result set
ALSO, watch out if you use the pattern: SELECT @Variable=column FROM table ...
if there are multiple rows returned from the query, your @Variable will only contain the value from the last row returned by the query.
RETURN VALUE
since your query returns an int field, at least based on how you named it. you can use this trick:
CREATE PROCEDURE GetMyInt
( @Param int)
AS
DECLARE @ReturnValue int
SELECT @ReturnValue=MyIntField FROM MyTable WHERE MyPrimaryKeyField = @Param
RETURN @ReturnValue
GO
and now call your procedure like:
DECLARE @SelectedValue int
,@Param int
SET @Param=1
EXEC @SelectedValue = GetMyInt @Param
PRINT @SelectedValue
this will only work for INTs, because RETURN can only return a single int value and nulls are converted to a zero.
OUTPUT PARAMETER
you can use an output parameter:
CREATE PROCEDURE GetMyInt
( @Param int
,@OutValue int OUTPUT)
AS
SELECT @OutValue=MyIntField FROM MyTable WHERE MyPrimaryKeyField = @Param
RETURN 0
GO
and now call your procedure like:
DECLARE @SelectedValue int
,@Param int
SET @Param=1
EXEC GetMyInt @Param, @SelectedValue OUTPUT
PRINT @SelectedValue
Output parameters can only return one value, but can be any data type
RESULT SET for a result set make the procedure like:
CREATE PROCEDURE GetMyInt
( @Param int)
AS
SELECT MyIntField FROM MyTable WHERE MyPrimaryKeyField = @Param
RETURN 0
GO
use it like:
DECLARE @ResultSet table (SelectedValue int)
DECLARE @Param int
SET @Param=1
INSERT INTO @ResultSet (SelectedValue)
EXEC GetMyInt @Param
SELECT * FROM @ResultSet
result sets can have many rows and many columns of any data type
If the string you have contains one, then you should use the other. For example, "You're able to do this"
, or 'He said "Hi!"'
. Other than that, you should simply be as consistent as you can (within a module, within a package, within a project, within an organisation).
If your code is going to be read by people who work with C/C++ (or if you switch between those languages and Python), then using ''
for single-character strings, and ""
for longer strings might help ease the transition. (Likewise for following other languages where they are not interchangeable).
The Python code I've seen in the wild tends to favour "
over '
, but only slightly. The one exception is that """these"""
are much more common than '''these'''
, from what I have seen.
=IF(B1<>"",COUNTA($B$1:B1)&".","")
Using formula
With jQuery:
$.ajax({
url:'http://www.example.com/somefile.ext',
type:'HEAD',
error: function()
{
//file not exists
},
success: function()
{
//file exists
}
});
EDIT:
Here is the code for checking 404 status, without using jQuery
function UrlExists(url)
{
var http = new XMLHttpRequest();
http.open('HEAD', url, false);
http.send();
return http.status!=404;
}
Small changes and it could check for status HTTP status code 200 (success), instead.
EDIT 2: Since sync XMLHttpRequest is deprecated, you can add a utility method like this to do it async:
function executeIfFileExist(src, callback) {
var xhr = new XMLHttpRequest()
xhr.onreadystatechange = function() {
if (this.readyState === this.DONE) {
callback()
}
}
xhr.open('HEAD', src)
}
it's late for this answer but i think maybe still can help, i try the both methods above, using two where conditions and the method with the array, none of those work for me i did several test and the condition was never getting executed, so i did a workaround, here is my code:
public function validateLogin($email, $password){
$password = md5($password);
$this->db->select("userID,email,password");
$query = $this->db->get_where("users", array("email" => $email));
$p = $query->row_array();
if($query->num_rows() == 1 && $password == $p['password']){
return $query->row();
}
}
This is the solution that I ended up using:
import pip
def install(package):
# Debugging
# pip.main(["install", "--pre", "--upgrade", "--no-index",
# "--find-links=.", package, "--log-file", "log.txt", "-vv"])
pip.main(["install", "--upgrade", "--no-index", "--find-links=.", package])
if __name__ == "__main__":
install("mypackagename")
raw_input("Press Enter to Exit...\n")
I pieced this together from pip install examples as well as from Rikard's answer on another question. The "--pre" argument lets you install non-production versions. The "--no-index" argument avoids searching the PyPI indexes. The "--find-links=." argument searches in the local folder (this can be relative or absolute). I used the "--log-file", "log.txt", and "-vv" arguments for debugging. The "--upgrade" argument lets you install newer versions over older ones.
I also found a good way to uninstall them. This is useful when you have several different Python environments. It's the same basic format, just using "uninstall" instead of "install", with a safety measure to prevent unintended uninstalls:
import pip
def uninstall(package):
response = raw_input("Uninstall '%s'? [y/n]:\n" % package)
if "y" in response.lower():
# Debugging
# pip.main(["uninstall", package, "-vv"])
pip.main(["uninstall", package])
pass
if __name__ == "__main__":
uninstall("mypackagename")
raw_input("Press Enter to Exit...\n")
The local folder contains these files: install.py, uninstall.py, mypackagename-1.0.zip
Howard's answer is concise and elegant, but it's also O(n^2) in the worst case. For large lists with large numbers of grouping key values, you'll want to sort the list first and then use itertools.groupby
:
>>> from itertools import groupby
>>> from operator import itemgetter
>>> seq = [["A",0], ["B",1], ["C",0], ["D",2], ["E",2]]
>>> seq.sort(key = itemgetter(1))
>>> groups = groupby(seq, itemgetter(1))
>>> [[item[0] for item in data] for (key, data) in groups]
[['A', 'C'], ['B'], ['D', 'E']]
Edit:
I changed this after seeing eyequem's answer: itemgetter(1)
is nicer than lambda x: x[1]
.
I had the same issue while importing the CSV file in AWS MySQL 8.0 RDS.
mysql> LOAD DATA LOCAL INFILE '/tmp/your.csv' INTO TABLE test.demo2 FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 LINES;
ERROR 1148 (42000): The used command is not allowed with this MySQL version
1) Check for local_infile
parameter
mysql> SHOW VARIABLES LIKE 'local_infile';
2) Log out from client and re-login using below parameter.
mysql -u root -p -h rdsendpoint --local-infile=1
3) Run the same command
mysql> LOAD DATA LOCAL INFILE '/tmp/your.csv' INTO TABLE test.demo2 FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 LINES;
Query OK, 300 rows affected (0.01 sec)
Records: 300 Deleted: 0 Skipped: 0 Warnings: 0
Try the following
double hours = (b-a).TotalHours;
If you just want the hour difference excluding the difference in days you can use the following
int hours = (b-a).Hours;
The difference between these two properties is mainly seen when the time difference is more than 1 day. The Hours property will only report the actual hour difference between the two dates. So if two dates differed by 100 years but occurred at the same time in the day, hours would return 0. But TotalHours will return the difference between in the total amount of hours that occurred between the two dates (876,000 hours in this case).
The other difference is that TotalHours will return fractional hours. This may or may not be what you want. If not, Math.Round can adjust it to your liking.
From the docs
IF boolean-expression THEN
statements
ELSE
statements
END IF;
So in your above example the code should look as follows:
IF select count(*) from orders > 0
THEN
DELETE from orders
ELSE
INSERT INTO orders values (1,2,3);
END IF;
You were missing: END IF;
Have you tried using Linux Installer to get a full Debian build on the phone? It's billed as being able to run a full LAMP environment in about 300M and has gotten some good reviews.
You can't use Microsoft.Office.Interop.Excel without having ms office installed.
Just search in google for some libraries, which allows to modify xls or xlsx:
There isn't much else to add other than what the docs say. If you want to dump the JSON into a file/socket or whatever, then you should go with dump()
. If you only need it as a string (for printing, parsing or whatever) then use dumps()
(dump string)
As mentioned by Antti Haapala in this answer, there are some minor differences on the ensure_ascii
behaviour. This is mostly due to how the underlying write()
function works, being that it operates on chunks rather than the whole string. Check his answer for more details on that.
json.dump()
Serialize obj as a JSON formatted stream to fp (a .write()-supporting file-like object
If ensure_ascii is False, some chunks written to fp may be unicode instances
json.dumps()
Serialize obj to a JSON formatted str
If ensure_ascii is False, the result may contain non-ASCII characters and the return value may be a unicode instance
There are two options. Ayman's approach is the most simple, but I would add one extra note to it. You should really cache jQuery selections, there is no reason to call $("#input-field-id")
twice:
var input = $( "#input-field-id" );
input.val( input.val() + "more text" );
The other option, .val()
can also take a function as an argument. This has the advantange of easily working on multiple inputs:
$( "input" ).val( function( index, val ) {
return val + "more text";
});
If your vectors are sorted*, check out set_union from <algorithm>.
set_union(A.begin(), A.end(), B.begin(), B.end(), AB.begin());
There's a more thorough example in the link
*thanks rlbond
i had the same problem with more than 250 lines and here is how i did it:
for example :
<row id="1" />
<row id="1" />
<row id="1" />
<row id="1" />
<row id="1" />
you put the cursor just after the "1" and you click on alt + shift
and start descending with down arrow until your reach the bottom line now you see a group of selections click on erase to erase the number 1 on each line simultaneously and go to Edit -> Column Editor
and select Number to Insert
then put 1
in initial number field and 1
in incremented by field and check zero numbers and click ok
Congratulations you did it :)
Incase someone wants to postion a child div directly under a parent
#father {
position: relative;
}
#son1 {
position: absolute;
top: 100%;
}
Working demo Codepen
In my case when I use something like result.class.name
I got something like Module1::class_name
. But if we only want class_name
, use
result.class.table_name.singularize
Try This:
$.ajax({
url:"",
type: "POST",
data: new FormData($('#uploadDatabaseForm')[0]),
contentType:false,
cache: false,
processData:false,
success:function (msg) {}
});
DateTime.Now
returns a DateTime
value that consists of the local date and time of the computer where the code is running. It has DateTimeKind.Local
assigned to its Kind
property. It is equivalent to calling any of the following:
DateTime.UtcNow.ToLocalTime()
DateTimeOffset.UtcNow.LocalDateTime
DateTimeOffset.Now.LocalDateTime
TimeZoneInfo.ConvertTime(DateTime.UtcNow, TimeZoneInfo.Local)
TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, TimeZoneInfo.Local)
DateTime.Today
returns a DateTime
value that has the same year, month, and day components as any of the above expressions, but with the time components set to zero. It also has DateTimeKind.Local
in its Kind
property. It is equivalent to any of the following:
DateTime.Now.Date
DateTime.UtcNow.ToLocalTime().Date
DateTimeOffset.UtcNow.LocalDateTime.Date
DateTimeOffset.Now.LocalDateTime.Date
TimeZoneInfo.ConvertTime(DateTime.UtcNow, TimeZoneInfo.Local).Date
TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, TimeZoneInfo.Local).Date
Note that internally, the system clock is in terms of UTC, so when you call DateTime.Now
it first gets the UTC time (via the GetSystemTimeAsFileTime
function in the Win32 API) and then it converts the value to the local time zone. (Therefore DateTime.Now.ToUniversalTime()
is more expensive than DateTime.UtcNow
.)
Also note that DateTimeOffset.Now.DateTime
will have similar values to DateTime.Now
, but it will have DateTimeKind.Unspecified
rather than DateTimeKind.Local
- which could lead to other errors depending on what you do with it.
So, the simple answer is that DateTime.Today
is equivalent to DateTime.Now.Date
.
But IMHO - You shouldn't use either one of these, or any of the above equivalents.
When you ask for DateTime.Now
, you are asking for the value of the local calendar clock of the computer that the code is running on. But what you get back does not have any information about that clock! The best that you get is that DateTime.Now.Kind == DateTimeKind.Local
. But whose local is it? That information gets lost as soon as you do anything with the value, such as store it in a database, display it on screen, or transmit it using a web service.
If your local time zone follows any daylight savings rules, you do not get that information back from DateTime.Now
. In ambiguous times, such as during a "fall-back" transition, you won't know which of the two possible moments correspond to the value you retrieved with DateTime.Now
. For example, say your system time zone is set to Mountain Time (US & Canada)
and you ask for DateTime.Now
in the early hours of November 3rd, 2013. What does the result 2013-11-03 01:00:00
mean? There are two moments of instantaneous time represented by this same calendar datetime. If I were to send this value to someone else, they would have no idea which one I meant. Especially if they are in a time zone where the rules are different.
The best thing you could do would be to use DateTimeOffset
instead:
// This will always be unambiguous.
DateTimeOffset now = DateTimeOffset.Now;
Now for the same scenario I described above, I get the value 2013-11-03 01:00:00 -0600
before the transition, or 2013-11-03 01:00:00 -0700
after the transition. Anyone looking at these values can tell what I meant.
I wrote a blog post on this very subject. Please read - The Case Against DateTime.Now.
Also, there are some places in this world (such as Brazil) where the "spring-forward" transition happens exactly at Midnight. The clocks go from 23:59 to 01:00. This means that the value you get for DateTime.Today
on that date, does not exist! Even if you use DateTimeOffset.Now.Date
, you are getting the same result, and you still have this problem. It is because traditionally, there has been no such thing as a Date
object in .Net. So regardless of how you obtain the value, once you strip off the time - you have to remember that it doesn't really represent "midnight", even though that's the value you're working with.
If you really want a fully correct solution to this problem, the best approach is to use NodaTime. The LocalDate
class properly represents a date without a time. You can get the current date for any time zone, including the local system time zone:
using NodaTime;
...
Instant now = SystemClock.Instance.Now;
DateTimeZone zone1 = DateTimeZoneProviders.Tzdb.GetSystemDefault();
LocalDate todayInTheSystemZone = now.InZone(zone1).Date;
DateTimeZone zone2 = DateTimeZoneProviders.Tzdb["America/New_York"];
LocalDate todayInTheOtherZone = now.InZone(zone2).Date;
If you don't want to use Noda Time, there is now another option. I've contributed an implementation of a date-only object to the .Net CoreFX Lab project. You can find the System.Time
package object in their MyGet feed. Once added to your project, you will find you can do any of the following:
using System;
...
Date localDate = Date.Today;
Date utcDate = Date.UtcToday;
Date tzSpecificDate = Date.TodayInTimeZone(anyTimeZoneInfoObject);
There is no hard and fast rule.
Here are some rules to make code thread safe in .NET and why these are not good rules:
lock
on a common thing. All locks must be done in same order. This will make the code thread safe, but it will be incredibly slow, and you might as well not use multiple threads.There is no rule that makes the code thread safe, the only thing you can do is make sure that your code will work no matter how many times is it being actively executed, each thread can be interrupted at any point, with each thread being in its own state/location, and this for each function (static or otherwise) that is accessing common objects.
Comments in the following listing of Java Code are the greyed out characters:
/**
* The HelloWorldApp class implements an application that
* simply displays "Hello World!" to the standard output.
*/
class HelloWorldApp {
public static void main(String[] args) {
System.out.println("Hello World!"); //Display the string.
}
}
The Java language supports three kinds of comments:
/* text */
The compiler ignores everything from /*
to */
.
/** documentation */
This indicates a documentation comment (doc comment, for short). The compiler ignores this kind of comment, just like it ignores comments that use /*
and */
. The JDK javadoc tool uses doc comments when preparing automatically generated documentation.
// text
The compiler ignores everything from //
to the end of the line.
Now regarding when you should be using them:
Use // text
when you want to comment a single line of code.
Use /* text */
when you want to comment multiple lines of code.
Use /** documentation */
when you would want to add some info about the program that can be used for automatic generation of program documentation.