Print ("This is how you pause")
input()
It's called the ternary operator
. For some more info, here's another question I answered regarding this:
If anyone comes here after me, this is the answer that worked for me.
NOTE: please make to read the comments before using this, this not complete. The best advice for update queries I can give is to switch to SqlServer ;)
update mytable t
set z = (
with comp as (
select b.*, 42 as computed
from mytable t
where bs_id = 1
)
select c.computed
from comp c
where c.id = t.id
)
Good luck,
GJ
this code works and dont throw any exception:
Session.Abandon();
Session["tempKey1"] = "tempValue1";
One thing to note here that Session.Clear remove items immediately but Session.Abandon marks the session to be abandoned at the end of the current request. That simply means that suppose you tried to access value in code just after the session.abandon command was executed, it will be still there. So do not get confused if your code is just not working even after issuing session.abandon command and immediately doing some logic with the session.
a very common try_files line which can be applied on your condition is
location / {
try_files $uri $uri/ /test/index.html;
}
you probably understand the first part, location /
matches all locations, unless it's matched by a more specific location, like location /test
for example
The second part ( the try_files
) means when you receive a URI that's matched by this block try $uri
first, for example http://example.com/images/image.jpg
nginx will try to check if there's a file inside /images
called image.jpg
if found it will serve it first.
Second condition is $uri/
which means if you didn't find the first condition $uri
try the URI as a directory, for example http://example.com/images/
, ngixn will first check if a file called images
exists then it wont find it, then goes to second check $uri/
and see if there's a directory called images
exists then it will try serving it.
Side note: if you don't have autoindex on
you'll probably get a 403 forbidden error, because directory listing is forbidden by default.
EDIT: I forgot to mention that if you have
index
defined, nginx will try to check if the index exists inside this folder before trying directory listing.
Third condition /test/index.html
is considered a fall back option, (you need to use at least 2 options, one and a fall back), you can use as much as you can (never read of a constriction before), nginx will look for the file index.html
inside the folder test
and serve it if it exists.
If the third condition fails too, then nginx will serve the 404 error page.
Also there's something called named locations, like this
location @error {
}
You can call it with try_files
like this
try_files $uri $uri/ @error;
TIP: If you only have 1 condition you want to serve, like for example inside folder images
you only want to either serve the image or go to 404 error, you can write a line like this
location /images {
try_files $uri =404;
}
which means either serve the file or serve a 404 error, you can't use only $uri
by it self without =404
because you need to have a fallback option.
You can also choose which ever error code you want, like for example:
location /images {
try_files $uri =403;
}
This will show a forbidden error if the image doesn't exist, or if you use 500 it will show server error, etc ..
First find out your IP camera's streaming url, like whether it's RTSP/HTTP etc.
Code changes will be as follows:
cap = cv2.VideoCapture("ipcam_streaming_url")
For example:
cap = cv2.VideoCapture("http://192.168.18.37:8090/test.mjpeg")
Because a string variable is a reference, not an instance.
Initializing it to Empty by default would have been possible but it would have introduced a lot of inconsistencies all over the board.
var module = angular.module("example", []);
module.controller("orderByController", function ($scope) {
$scope.orderByValue = function (value) {
return value;
};
$scope.items = ["c", "b", "a"];
$scope.objList = [
{
"name": "c"
}, {
"name": "b"
}, {
"name": "a"
}];
$scope.item = "b";
});
If you need pixel level control over canvas you can do using createImageData and putImageData.
HTML:
<canvas id="qrCode" width="200", height="200">
QR Code
</canvas>
And JavaScript:
function setPixel(imageData, pixelData) {
var index = (pixelData.x + pixelData.y * imageData.width) * 4;
imageData.data[index+0] = pixelData.r;
imageData.data[index+1] = pixelData.g;
imageData.data[index+2] = pixelData.b;
imageData.data[index+3] = pixelData.a;
}
element = document.getElementById("qrCode");
c = element.getContext("2d");
pixcelSize = 4;
width = element.width;
height = element.height;
imageData = c.createImageData(width, height);
for (i = 0; i < 1000; i++) {
x = Math.random() * width / pixcelSize | 0; // |0 to Int32
y = Math.random() * height / pixcelSize| 0;
for(j=0;j < pixcelSize; j++){
for(k=0;k < pixcelSize; k++){
setPixel( imageData, {
x: x * pixcelSize + j,
y: y * pixcelSize + k,
r: 0 | 0,
g: 0 | 0,
b: 0 * 256 | 0,
a: 255 // 255 opaque
});
}
}
}
c.putImageData(imageData, 0, 0);
Depending on your ssh client, you can set the StrictHostKeyChecking option to no on the command line, and/or send the key to a null known_hosts file. You can also set these options in your config file, either for all hosts or for a given set of IP addresses or host names.
ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no
EDIT
As @IanDunn notes, there are security risks to doing this. If the resource you're connecting to has been spoofed by an attacker, they could potentially replay the destination server's challenge back to you, fooling you into thinking that you're connecting to the remote resource while in fact they are connecting to that resource with your credentials. You should carefully consider whether that's an appropriate risk to take on before altering your connection mechanism to skip HostKeyChecking.
for nodejs should uninstall it and download your favorite version from nodejs.org for npm run below line in cmd:
npm i npm
Scikit-Learn is just telling you it doesn't recognise the argument "stratify", not that you're using it incorrectly. This is because the parameter was added in version 0.17 as indicated in the documentation you quoted.
So you just need to update Scikit-Learn.
Try to use (focusout) instead of (blur)
You can check scrollHeight and clientHeight with scrollTop to scroll to bottom of div like code below.
$('#div').scroll(function (event) {_x000D_
if ((parseInt($('#div')[0].scrollHeight) - parseInt(this.clientHeight)) == parseInt($('#div').scrollTop())) _x000D_
{_x000D_
console.log("this is scroll bottom of div");_x000D_
}_x000D_
_x000D_
});
_x000D_
Why all people want to use '==' instead of simple '=' ? It is bad habit! It used only in [[ ]] expression. And in (( )) too. But you may use just = too! It work well in any case. If you use numbers, not strings use not parcing to strings and then compare like strings but compare numbers. like that
let -i i=5 # garantee that i is nubmber
test $i -eq 5 && echo "$i is equal 5" || echo "$i not equal 5"
It's match better and quicker. I'm expert in C/C++, Java, JavaScript. But if I use bash i never use '==' instead '='. Why you do so?
The problem is you're not doing anything with the result of replace
. In Python strings are immutable so anything that manipulates a string returns a new string instead of modifying the original string.
line[8] = line[8].replace(letter, "")
I had the same issue with Symfony 2.8.
I didn't get it at first, because there were no similar problems with int length of foreign keys etc.
Finally I had to do the following in the project folder. (A server restart didn't help!)
app/console doctrine:cache:clear-metadata
app/console doctrine:cache:clear-query
app/console doctrine:cache:clear-result
Here's a solution using a lineJoin to round the corners. Works if you just need a solid shape but not so much if you need a thin border that's smaller than the border radius.
function roundedRect(ctx, options) {
ctx.strokeStyle = options.color;
ctx.fillStyle = options.color;
ctx.lineJoin = "round";
ctx.lineWidth = options.radius;
ctx.strokeRect(
options.x+(options.radius*.5),
options.y+(options.radius*.5),
options.width-options.radius,
options.height-options.radius
);
ctx.fillRect(
options.x+(options.radius*.5),
options.y+(options.radius*.5),
options.width-options.radius,
options.height-options.radius
);
ctx.stroke();
ctx.fill();
}
const canvas = document.getElementsByTagName("CANVAS")[0];
let ctx = canvas.getContext('2d');
roundedRect(ctx, {
x: 10,
y: 10,
width: 200,
height: 100,
radius: 10,
color: "red"
});
You want multiple lines of text indented on the left. Try the following:
CSS:
div.info {
margin-left: 10px;
}
span.info {
color: #b1b1b1;
font-size: 11px;
font-style: italic;
font-weight:bold;
}
HTML:
<div class="info"><span class="info">blah blah <br/> blah blah</span></div>
Here is a one line lambda:
df[map(lambda x :x not in ['b'], list(df.columns))]
before:
import pandas
import numpy as np
df = pd.DataFrame(np.random.rand(4,4), columns = list('abcd'))
df
a b c d
0 0.774951 0.079351 0.118437 0.735799
1 0.615547 0.203062 0.437672 0.912781
2 0.804140 0.708514 0.156943 0.104416
3 0.226051 0.641862 0.739839 0.434230
after:
df[map(lambda x :x not in ['b'], list(df.columns))]
a c d
0 0.774951 0.118437 0.735799
1 0.615547 0.437672 0.912781
2 0.804140 0.156943 0.104416
3 0.226051 0.739839 0.434230
On bash at least, we can force the return value of the exit code of the command to be 0
You can remove the old remote and add it again
git remote remove $1 || true
git remote add $1 $2
Initially I too faced this same problem, I installed python and when I run pip
command it used to throw me an error like shown in pic below.
Make Sure pip path is added in environmental variables. For me, the python and pip installation path is::
Python: C:\Users\fhhz\AppData\Local\Programs\Python\Python38\
pip: C:\Users\fhhz\AppData\Local\Programs\Python\Python38\Scripts
Both these paths were added to path in environmental variables.
Now Open a new cmd window and type pip, you should be seeing a screen as below.
Now type pip install <<package-name>>
. Here I'm installing package spyder so my command line statement will be as pip install spyder
and here goes my running screen..
and I hope we are done with this!!
The installation of these tools may vary on different OS.
Under Windows, node-sass currently supports VS2015 by default, if you only have VS2013 in your box and meet any error while running the command, you can define the version of VS by adding: --msvs_version=2013. This is noted on the node-sass npm page.
So, the safe command line that works on Windows with VS2013 is: npm install --msvs_version=2013 gulp node-sass gulp-sass
HTTP may not have an upper limit, but webservers may have one. In ASP.NET there is a default accept-limit of 4 MB, but you (the developer/webmaster) can change that to be higher or lower.
When I was recently looking for an R function returning indexes of top N max/min numbers in a given vector, I was surprised there is no such a function.
And this is something very similar.
The brute force solution using base::order function seems to be the easiest one.
topMaxUsingFullSort <- function(x, N) {
sort(x, decreasing = TRUE)[1:min(N, length(x))]
}
But it is not the fastest one in case your N value is relatively small compared to length of the vector x.
On the other side if the N is really small, you can use base::whichMax function iteratively and in each iteration you can replace found value by -Inf
# the input vector 'x' must not contain -Inf value
topMaxUsingWhichMax <- function(x, N) {
vals <- c()
for(i in 1:min(N, length(x))) {
idx <- which.max(x)
vals <- c(vals, x[idx]) # copy-on-modify (this is not an issue because idxs is relative small vector)
x[idx] <- -Inf # copy-on-modify (this is the issue because data vector could be huge)
}
vals
}
I believe you see the problem - the copy-on-modify nature of R. So this will perform better for very very very small N (1,2,3) but it will rapidly slow down for larger N values. And you are iterating over all elements in vector x N times.
I think the best solution in clean R is to use partial base::sort.
topMaxUsingPartialSort <- function(x, N) {
N <- min(N, length(x))
x[x >= -sort(-x, partial=N)[N]][1:N]
}
Then you can select the last (Nth) item from the result of functions defiend above.
Note: functions defined above are just examples - if you want to use them, you have to check/sanity inputs (eg. N > length(x)).
I wrote a small article about something very similar (get indexes of top N max/min values of a vector) at http://palusga.cz/?p=18 - you can find here some benchmarks of similar functions I defined above.
Maps never take into consideration the whole map. My guess is:- 1. According to your location, they load a place and the landmarks on that place. 2. When you search the destination, thats when they load the other part of the map and make a graph out of two places and then apply the shortest path algorithms.
Also, there is an important technique Dynamic programming which i suspect is used in the calculation of shortest paths. You can refer to that as well.
Have you made sure that the folder "c:\teste
" exists? If it doesn't, explorer will open showing some default folder (in my case "C:\Users\[user name]\Documents
").
Update
I have tried the following variations:
// opens the folder in explorer
Process.Start(@"c:\temp");
// opens the folder in explorer
Process.Start("explorer.exe", @"c:\temp");
// throws exception
Process.Start(@"c:\does_not_exist");
// opens explorer, showing some other folder)
Process.Start("explorer.exe", @"c:\does_not_exist");
If none of these (well, except the one that throws an exception) work on your computer, I don't think that the problem lies in the code, but in the environment. If that is the case, I would try one (or both) of the following:
If you use bash, then the terminal history is saved in a file called .bash_history. Delete it, and history will be gone.
However, for MySQL the better approach is not to enter the password in the command line. If you just specify the -p option, without a value, then you will be prompted for the password and it won't be logged.
Another option, if you don't want to enter your password every time, is to store it in a my.cnf file. Create a file named ~/.my.cnf with something like:
[client]
user = <username>
password = <password>
Make sure to change the file permissions so that only you can read the file.
Of course, this way your password is still saved in a plaintext file in your home directory, just like it was previously saved in .bash_history.
If you want to style the subtitle also then simply add this in your custom style.
<item name="android:subtitleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
People who are looking to get the same result for AppCompat
library then this is what I used:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="CustomActivityTheme" parent="@style/Theme.AppCompat.Light.DarkActionBar">
<item name="android:actionBarStyle">@style/MyActionBar</item>
<item name="actionBarStyle">@style/MyActionBar</item>
<!-- other activity and action bar styles here -->
</style>
<!-- style for the action bar backgrounds -->
<style name="MyActionBar" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:background">@drawable/actionbar_background</item>
<item name="background">@drawable/actionbar_background</item>
<item name="android:titleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
<item name="android:subtitleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
<item name="titleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
<item name="subtitleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
</style>
<style name="MyTheme.ActionBar.TitleTextStyle" parent="@style/TextAppearance.AppCompat.Widget.ActionBar.Title">
<item name="android:textColor">@color/color_title</item>
</style>
</resources>
You can always use the 'pre' tag inside the label, and just enter the blank spaces in it, So you can always add the same or different number of spaces you require
<form>
<label>First Name :<pre>Here just enter number of spaces you want to use(I mean using spacebar to enter blank spaces)</pre>
<input type="text"></label>
<label>Last Name :<pre>Now Enter enter number of spaces to match above number of
spaces</pre>
<input type="text"></label>
</form>
Hope you like my answer, It's a simple and efficient hack
I found the solution here:
How to properly -filter multiple strings in a PowerShell copy script
You have to use -Include
flag for Get-ChildItem
My Example:
$Location = "C:\user\files"
$result = (Get-ChildItem $Location\* -Include *.png, *.gif, *.jpg)
Dont forget put "*" after path location.
In computing, the 'kernel' is the central component of most computer operating systems; it is a bridge between applications and the actual data processing done at the hardware level. The kernel's responsibilities include managing the system's resources (the communication between hardware and software components). Usually as a basic component of an operating system, a kernel can provide the lowest-level abstraction layer for the resources (especially processors and I/O devices) that application software must control to perform its function. It typically makes these facilities available to application processes through inter-process communication mechanisms and system calls.
I have no idea why the other answers didn't work for me (error 500) but this works
@GetMapping("")
public String getAll() {
List<Entity> entityList = entityManager.findAll();
List<JSONObject> entities = new ArrayList<JSONObject>();
for (Entity n : entityList) {
JSONObject Entity = new JSONObject();
entity.put("id", n.getId());
entity.put("address", n.getAddress());
entities.add(entity);
}
return entities.toString();
}
How about
MyLB is a listbox
Label ll = new Label();
ll.Width = MyLB.Width;
ll.Content = ss;
if(///<some condition>///)
ll.Background = Brushes.LightGreen;
else
ll.Background = Brushes.LightPink;
MyLB.Items.Add(ll);
Hi try with this overflow-y: scroll. I hope it may helps you
Sounds like you are using Microsoft Visual C++. If that is the case, then the most possibility is that you don't compile your two.cpp with one.cpp (one.cpp is the implementation for one.h).
If you are from command line (cmd.exe), then try this first: cl -o two.exe one.cpp two.cpp
If you are from IDE, right click on the project name from Solution Explore. Then choose Add, Existing Item.... Add one.cpp into your project.
It's working for me :
Spring controller : DownloadController.java
package com.mycompany.myapp.controller;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.mycompany.myapp.exception.TechnicalException;
@RestController
public class DownloadController {
private final Logger log = LoggerFactory.getLogger(DownloadController.class);
@RequestMapping(value = "/download", method = RequestMethod.GET)
public void download(@RequestParam ("name") String name, final HttpServletRequest request, final HttpServletResponse response) throws TechnicalException {
log.trace("name : {}", name);
File file = new File ("src/main/resources/" + name);
log.trace("Write response...");
try (InputStream fileInputStream = new FileInputStream(file);
OutputStream output = response.getOutputStream();) {
response.reset();
response.setContentType("application/octet-stream");
response.setContentLength((int) (file.length()));
response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
IOUtils.copyLarge(fileInputStream, output);
output.flush();
} catch (IOException e) {
log.error(e.getMessage(), e);
}
}
}
AngularJs Service : download.service.js
(function() {
'use strict';
var downloadModule = angular.module('components.donwload', []);
downloadModule.factory('downloadService', ['$q', '$timeout', '$window',
function($q, $timeout, $window) {
return {
download: function(name) {
var defer = $q.defer();
$timeout(function() {
$window.location = 'download?name=' + name;
}, 1000)
.then(function() {
defer.resolve('success');
}, function() {
defer.reject('error');
});
return defer.promise;
}
};
}
]);
})();
AngularJs config : app.js
(function() {
'use strict';
var myApp = angular.module('myApp', ['components.donwload']);
/* myApp.config([function () {
}]);
myApp.run([function () {
}]);*/
})();
AngularJs controller : download.controller.js
(function() {
'use strict';
angular.module('myApp')
.controller('DownloadSampleCtrl', ['downloadService', function(downloadService) {
this.download = function(fileName) {
downloadService.download(fileName)
.then(function(success) {
console.log('success : ' + success);
}, function(error) {
console.log('error : ' + error);
});
};
}]);
})();
index.html
<!DOCTYPE html>
<html ng-app="myApp">
<head>
<title>My App</title>
<link rel="stylesheet" href="bower_components/normalize.css/normalize.css" />
<link rel="stylesheet" href="assets/styles/main.css" />
<link rel="icon" href="favicon.ico">
</head>
<body>
<div ng-controller="DownloadSampleCtrl as ctrl">
<button ng-click="ctrl.download('fileName.txt')">Download</button>
</div>
<script src="bower_components/angular/angular.min.js"></script>
<!-- App config -->
<script src="scripts/app/app.js"></script>
<!-- Download Feature -->
<script src="scripts/app/download/download.controller.js"></script>
<!-- Components -->
<script src="scripts/components/download/download.service.js"></script>
</body>
</html>
Do it with inline styles and script:
<div class="btn-group has-feedback has-clear">
<input id="searchinput" type="search" class="form-control" style="width:200px;">
<a
id="searchclear"
class="glyphicon glyphicon-remove-circle form-control-feedback form-control-clear"
style="pointer-events:auto; text-decoration:none; cursor:pointer;"
onclick="$(this).prev('input').val('');return false;">
</a>
</div>
I don't know exactly what you are doing, but float("inf")
gives you a float Infinity, which is greater than any other number.
Due to the fact that I answered this in 2014, I have updated my answer to account for more recent versions of ansible.
Yes, you can do it at the host/inventory level (Which became possible on newer ansible versions) or global level:
inventory:
Add the following.
ansible_ssh_common_args='-o StrictHostKeyChecking=no'
host:
Add the following.
ansible_ssh_extra_args='-o StrictHostKeyChecking=no'
hosts/inventory options will work with connection type ssh
and not paramiko
. Some people may strongly argue that inventory and hosts is more secure because the scope is more limited.
global:
Ansible User Guide - Host Key Checking
You can do it either in the /etc/ansible/ansible.cfg
or ~/.ansible.cfg
file:
[defaults]
host_key_checking = False
Or you can setup and env variable (this might not work on newer ansible versions):
export ANSIBLE_HOST_KEY_CHECKING=False
The more common reason for this message to be printed is because you forgot to include the directory in which the source file resides. As a result, gcc "thinks" this file does not exist.
You can add the directory using the -I argument to gcc.
2 ways to enable TLSv1.1 and TLSv1.2:
schemeRegistry.register(new Scheme("https", new TlsSniSocketFactory(), port));
In perl:
if($testString =~ /\d/)
{
print "This string contains at least one digit"
}
where \d
matches to a digit.
The CLSID you describe is for the Microsoft.Office.Interop.Excel.ApplicationClass. This class basically launches excel.exe through InprocServer32. If you don't have it installed then it will return the error message you received above.
Use the two argument for of Collections.sort
. You will want a suitable Comparator
that treats case appropriate (i.e. does lexical, not UTF16 ordering), such as that obtainable through java.text.Collator.getInstance
.
For Java based Application add this to your web.xml file:
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.ttf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.otf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.eot</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.woff</url-pattern>
</servlet-mapping>
SOLUTION:
cd "Documents and Photos"
problem solved.
The reason I'm submitting this answer is you'll find that StackOverflow is being used by every day users (not just web devs, programmers or power users) and this was the number one result for a simple Windows user question on Google.
People are becoming more tech-savvy, but aren't necessarily familiar with command line in the cases above.
Since at the time of installing of any module it mainly put corresponding .pm files in respective directories.
So if you want to remove module only for some testing purpose or temporarily best is to find the path where module is stored using perldoc -l <MODULE>
and then simply move the module from there to some other location.
This approach can also be tried as a more permanent solution but i am not aware of any negative consequences as i do it mainly for testing.
In addition to adding @Transactional
on @Test
method, you also need to add @Rollback(false)
public static boolean isDirectory(String path) {
return path !=null && new File(path).isDirectory();
}
To answer the question directly.
Find the file "config.inc.php" under your phpMyAdmin directory and edit the following lines:
$cfg['Servers'][$i]['auth_type'] = 'config'; // config, http, cookie
$cfg['Servers'][$i]['user'] = 'root'; // MySQL user
$cfg['Servers'][$i]['password'] = 'TYPE_YOUR_PASSWORD_HERE'; // MySQL password
Note that the password used in the 'password' field must be the same for the MySQL root password. Also, you should check if root login is allowed in this line:
$cfg['Servers'][$i]['AllowRoot'] = TRUE; // true = allow root login
This way you have your root password set.
I looked into this a lot because I needed to use a numpy.array as a set in one of my school projects and I needed to be initialized empty... I didn't found any relevant answer here on Stack Overflow, so I started doodling something.
# Initialize your variable as an empty list first
In [32]: x=[]
# and now cast it as a numpy ndarray
In [33]: x=np.array(x)
The result will be:
In [34]: x
Out[34]: array([], dtype=float64)
Therefore you can directly initialize an np array as follows:
In [36]: x= np.array([], dtype=np.float64)
I hope this helps.
$(element).click(function(){
window.close();
});
Note: you can not close any window that you didn't opened with window.open
. Directly invoking window.close()
will ask user with a dialogue box.
I got the same console warning, when an ajax request was firing, so my form was also not working properly.
I disabled caching on the server's ajax call with the following response headers:
Cache-Control: no-cache, no-store, must-revalidate
Expires: -1
Pragma: no-cache
After this, the form was working. Refer to the server language (c#, php, java etc) you are using on how to add these response headers.
You can make the app dismiss the keyboard using the following function
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.view.endEditing(true)
return false
}
Here is a full example to better illustrate that:
//
// ViewController.swift
//
//
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet var myTextField : UITextField
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.myTextField.delegate = self
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.view.endEditing(true)
return false
}
}
Code source: http://www.snip2code.com/Snippet/85930/swift-delegate-sample
If you are using the 'pylab' for interactive plotting you can set the labelsize at creation time with pylab.ylabel('Example', fontsize=40)
.
If you use pyplot
programmatically you can either set the fontsize on creation with ax.set_ylabel('Example', fontsize=40)
or afterwards with ax.yaxis.label.set_size(40)
.
Use $(this)
for get the desire element.
function openAll()
{
$("tr.b_row").each(function(){
var a_href = $(this).find('.cpt h2 a').attr('href');
alert ("Href is: "+a_href);
});
}
I have a naive solution but useful. Here is the code:
<Grid Name="TVGrid" Background="#7F000000"> <ScrollBar Background="Black" Orientation="Vertical" Height="35" HorizontalAlignment="Left" Margin="215,254,0,0" Minimum="0" Maximum="10" LargeChange="10" Value="{Binding ElementName=channeltext2, Path=Text}" x:Name="scroll" VerticalAlignment="Top" Width="12" RenderTransformOrigin="0.5,0.5" ValueChanged="scroll_ValueChanged" >
<ScrollBar.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="-180"/>
<TranslateTransform/>
</TransformGroup>
</ScrollBar.RenderTransform>
</ScrollBar>
<TextBox Name="channeltext" HorizontalContentAlignment="Center" FontSize="20" Background="Black" Foreground="White" Height="35" HorizontalAlignment="Left" Margin="147,254,0,0" VerticalAlignment="Top" Width="53" Text="0" />
<TextBox Name="channeltext2" Visibility="Hidden" HorizontalContentAlignment="Center" FontSize="20" Background="Black" Foreground="White" Height="35" HorizontalAlignment="Left" Margin="147,254,0,0" VerticalAlignment="Top" Width="53" Text="0" /> </Grid>
You should never need to modify the path directly, either through environment variables or sys.path
. Whether you use the os (ex. apt-get
), or pip
in a virtualenv, packages will be installed to a location already on the path.
In your example, GNU Radio is installed to the system Python 2's standard site-packages
location, which is already in the path. Pointing PyCharm at the correct interpreter is enough; if it isn't there is something else wrong that isn't apparent. It may be that /usr/bin/python
does not point to the same interpreter that GNU Radio was installed in; try pointing specifically at the python2.7
binary. Or, PyCharm used to be somewhat bad at detecting packages; File > Invalidate Caches > Invalidate and Restart
would tell it to rescan.
This answer will cover how you should set up a project environment, install packages in different scenarios, and configure PyCharm. I refer multiple times to the Python Packaging User Guide, written by the same group that maintains the official Python packaging tools.
The correct way to develop a Python application is with a virtualenv. Packages and version are installed without affecting the system or other projects. PyCharm has a built-in interface to create a virtualenv and install packages. Or you can create it from the command line and then point PyCharm at it.
$ cd MyProject
$ python2 -m virtualenv env
$ . env/bin/activate
$ pip install -U pip setuptools # get the latest versions
$ pip install flask # install other packages
In your PyCharm project, go to File > Settings > Project > Project Interpreter
. If you used virtualenvwrapper
or PyCharm to create the env, then it should show up in the menu. If not, click the gear, choose Add Local
, and locate the Python binary in the env. PyCharm will display all the packages in the selected env.
In some cases, such as with GNU Radio, there is no package to install with pip
, the package was installed system-wide when you install the rest of GNU Radio (ex. apt-get install gnuradio
). In this case, you should still use a virtualenv, but you'll need to make it aware of this system package.
$ python2 -m virtualenv --system-site-packages env
Unfortunately it looks a little messy, because all system packages will now appear in your env, but they are just links, you can still safely install or upgrade packages without affecting the system.
In some cases, you will have multiple local packages you're developing, and will want one project to use the other package. In this case you might think you have to add the local package to the other project's path, but this is not the case. You should install your package in development mode. All this requires is adding a setup.py
file to your package, which will be required anyway to properly distribute and deploy the package later.
Minimal setup.py
for your first project:
from setuptools import setup, find_packages
setup(
name='mypackage',
version='0.1',
packages=find_packages(),
)
Then install it in your second project's env:
$ pip install -e /path/to/first/project
I would have thought this would have been answered already - but surely what you want is this: box-shadow: 0 0 3px #CC0000;
Example: http://jsfiddle.net/vmzLW/
Yeah, you can do it. Just open Settings -> Live Templates. Create new one with syso
as abbreviation and System.out.println($END$);
as Template text.
Changing the tab order should be all it takes to accomplish this. Keep it simple.
Another simple option would be to put the back button after the submit button in the HTML code but float it to the left so it appears on the page before the submit button.
Another option, how to achieve this, is by using pandas.DataFrame.query()
method. Let me show you an example on the following data frame called df
.
>>> df = pd.DataFrame(np.random.random((5, 1)), columns=['col_1'])
>>> df['date'] = pd.date_range('2020-1-1', periods=5, freq='D')
>>> print(df)
col_1 date
0 0.015198 2020-01-01
1 0.638600 2020-01-02
2 0.348485 2020-01-03
3 0.247583 2020-01-04
4 0.581835 2020-01-05
As an argument, use the condition for filtering like this:
>>> start_date, end_date = '2020-01-02', '2020-01-04'
>>> print(df.query('date >= @start_date and date <= @end_date'))
col_1 date
1 0.244104 2020-01-02
2 0.374775 2020-01-03
3 0.510053 2020-01-04
If you do not want to include boundaries, just change the condition like following:
>>> print(df.query('date > @start_date and date < @end_date'))
col_1 date
2 0.374775 2020-01-03
You will have to open the file in one way or another if you want to access the data within it. Obviously, one way is to open it in your Excel application instance, e.g.:-
(untested code)
Dim wbk As Workbook
Set wbk = Workbooks.Open("C:\myworkbook.xls")
' now you can manipulate the data in the workbook anyway you want, e.g. '
Dim x As Variant
x = wbk.Worksheets("Sheet1").Range("A6").Value
Call wbk.Worksheets("Sheet2").Range("A1:G100").Copy
Call ThisWorbook.Worksheets("Target").Range("A1").PasteSpecial(xlPasteValues)
Application.CutCopyMode = False
' etc '
Call wbk.Close(False)
Another way to do it would be to use the Excel ADODB provider to open a connection to the file and then use SQL to select data from the sheet you want, but since you are anyway working from within Excel I don't believe there is any reason to do this rather than just open the workbook. Note that there are optional parameters for the Workbooks.Open() method to open the workbook as read-only, etc.
I see a lot of sed answers, but none for vim. To be fair, vim's treatment of newline characters is a little confusing. Search for \n but replace with \r. I recommend RTFM: :help pattern
in general and :help NL-used-for-Nul
in particular.
To do what you want with a :substitute command,
:%s/\_$/\r
although I think most people would use something like
:g/^/put=''
for the same effect.
Here is a way to find the answer for yourself. Run your file through xxd, which is part of the standard vim distribution.
:%!xxd
You get
0000000: 4361 6c69 666f 726e 6961 0a4d 6173 7361 California.Massa
0000010: 6368 7573 6574 7473 0a41 7269 7a6f 6e61 chusetts.Arizona
0000020: 0a .
This shows that 46 is the hex code for C, 61 is the code for a, and so on. In particular, 0a (decimal 10) is the code for \n. Just for kicks, try
:set ff=dos
before filtering through xxd. You will see 0d0a (CRLF) as the line terminator.
:help /\_$
:help :g
:help :put
:help :!
:help 23.4
The previous solutions have used the custom StructType.
With spark-sql 2.4.5 (scala version 2.12.10) it is now possible to specify the schema as a string using the schema
function
import org.apache.spark.sql.SparkSession;
val sparkSession = SparkSession.builder()
.appName("sample-app")
.master("local[2]")
.getOrCreate();
val pageCount = sparkSession.read
.format("csv")
.option("delimiter","|")
.option("quote","")
.schema("project string ,article string ,requests integer ,bytes_served long")
.load("dbfs:/databricks-datasets/wikipedia-datasets/data-001/pagecounts/sample/pagecounts-20151124-170000")
If you are requesting only page data, then you can use a page access token. You will only have to authorize the user once to get the user access token; extend it to two months validity then request the token for the page. This is all explained in Scenario 5. Note, that the acquired page access token is only valid for as long as the user access token is valid.
This site might help you out with all of that:
You can pass params directly to $http.get()
The following works fine
$http.get(user.details_path, {
params: { user_id: user.id }
});
Just making code shorter you can use ES6 features. The same things can be written as
app.get("/recipes", (req, res) => {
res.render("recipes.ejs", {
recipes
});
});
And the Templeate can be render as the same!
<%if (recipes.length > 0) { %>
// Do something with more than 1 recipe
<% } %>
AWS / Heroku are both free for small hobby projects (to start with).
If you want to start an app right away, without much customization of the architecture, then choose Heroku.
If you want to focus on the architecture and to be able to use different web servers, then choose AWS. AWS is more time-consuming based on what service/product you choose, but can be worth it. AWS also comes with many plugin services and products.
Heroku
AWS
I guess this thread needs an update. If you look at any of the npm registries which are available, they are extremely heavy and they need couchdb. Gemfurry and others need you to fork off from public repos. Some of the npm's like shadow-npm have no recent commits.
Then, we found Reggie. Its got a good commit activity, extremely easy to install and use and has pretty good community support. Its extremely light-weight and you don't have to deal with couchdb, etc.
You can do this to only monitor own properties of the object:
var arr = [];
for (var key in p) {
if (p.hasOwnProperty(key)) {
arr.push(p[key]);
}
}
Use the following to check if text box is empty or have more than 1 white spaces
var name = jQuery.trim($("#ContactUsName").val());
if ((name.length == 0))
{
Your code
}
else
{
Your code
}
A note of personal experience in addition to both Stefan Gehrig's answer and Dave None's answer (and mmmshuddup's reply):
I was having validation problems using both \n and PHP_EOL when I used the ICS validator at http://severinghaus.org/projects/icv/
I learned I had to use \r\n in order to get it to validate properly, so this was my solution:
function dateToCal($timestamp) {
return date('Ymd\Tgis\Z', $timestamp);
}
function escapeString($string) {
return preg_replace('/([\,;])/','\\\$1', $string);
}
$eol = "\r\n";
$load = "BEGIN:VCALENDAR" . $eol .
"VERSION:2.0" . $eol .
"PRODID:-//project/author//NONSGML v1.0//EN" . $eol .
"CALSCALE:GREGORIAN" . $eol .
"BEGIN:VEVENT" . $eol .
"DTEND:" . dateToCal($end) . $eol .
"UID:" . $id . $eol .
"DTSTAMP:" . dateToCal(time()) . $eol .
"DESCRIPTION:" . htmlspecialchars($title) . $eol .
"URL;VALUE=URI:" . htmlspecialchars($url) . $eol .
"SUMMARY:" . htmlspecialchars($description) . $eol .
"DTSTART:" . dateToCal($start) . $eol .
"END:VEVENT" . $eol .
"END:VCALENDAR";
$filename="Event-".$id;
// Set the headers
header('Content-type: text/calendar; charset=utf-8');
header('Content-Disposition: attachment; filename=' . $filename);
// Dump load
echo $load;
That stopped my parse errors and made my ICS files validate properly.
You could convert the dataframe to be a single column with stack
(this changes the shape from 5x3 to 15x1) and then take the standard deviation:
df.stack().std() # pandas default degrees of freedom is one
Alternatively, you can use values
to convert from a pandas dataframe to a numpy array before taking the standard deviation:
df.values.std(ddof=1) # numpy default degrees of freedom is zero
Unlike pandas, numpy will give the standard deviation of the entire array by default, so there is no need to reshape before taking the standard deviation.
A couple of additional notes:
The numpy approach here is a bit faster than the pandas one, which is generally true when you have the option to accomplish the same thing with either numpy or pandas. The speed difference will depend on the size of your data, but numpy was roughly 10x faster when I tested a few different sized dataframes on my laptop (numpy version 1.15.4 and pandas version 0.23.4).
The numpy and pandas approaches here will not give exactly the same answers, but will be extremely close (identical at several digits of precision). The discrepancy is due to slight differences in implementation behind the scenes that affect how the floating point values get rounded.
Or install syswin package, which includes a port of su for cygwin: http://sourceforge.net/p/manufacture/wiki/syswin-su/
The most voted answer has got already defined [String] function body. I was looking for the solution to rename already declared function's name and finally after an hour of struggling I've dealt with it. It:
.toString()
methodfunction
and (
new Function()
constructorfunction nameAppender(name,fun){_x000D_
const reg = /^(function)(?:\s*|\s+([A-Za-z0-9_$]+)\s*)(\()/;_x000D_
return (new Function(`return ${fun.toString().replace(reg,`$1 ${name}$3`)}`))();_x000D_
}_x000D_
_x000D_
//WORK FOR ALREADY NAMED FUNCTIONS:_x000D_
function hello(name){_x000D_
console.log('hello ' + name);_x000D_
}_x000D_
_x000D_
//rename the 'hello' function_x000D_
var greeting = nameAppender('Greeting', hello); _x000D_
_x000D_
console.log(greeting); //function Greeting(name){...}_x000D_
_x000D_
_x000D_
//WORK FOR ANONYMOUS FUNCTIONS:_x000D_
//give the name for the anonymous function_x000D_
var count = nameAppender('Count',function(x,y){ _x000D_
this.x = x;_x000D_
this.y = y;_x000D_
this.area = x*y;_x000D_
}); _x000D_
_x000D_
console.log(count); //function Count(x,y){...}
_x000D_
You can also use REPLACE()
:
UPDATE Table
SET Column = REPLACE(Column, 'Test123', 'Test')
Imagine you have the objects below:
var obj1= {};
var obj2= {test: "test"};
Don't forget we can NOT use === sign for testing an object equality as they get inheritance, so If you using ECMA 5 and upper version of javascript, the answer is easy, you can use the function below:
function isEmpty(obj) {
//check if it's an Obj first
var isObj = obj !== null
&& typeof obj === 'object'
&& Object.prototype.toString.call(obj) === '[object Object]';
if (isObj) {
for (var o in obj) {
if (obj.hasOwnProperty(o)) {
return false;
break;
}
}
return true;
} else {
console.error("isEmpty function only accept an Object");
}
}
so the result as below:
isEmpty(obj1); //this returns true
isEmpty(obj2); //this returns false
isEmpty([]); // log in console: isEmpty function only accept an Object
WPF: System.Windows.Clipboard
(PresentationCore.dll)
Winforms: System.Windows.Forms.Clipboard
Both have a static SetText
method.
Step 1: Go to directory where the classes are kept using command prompt (or Linux shell prompt)
Like for Project.
C:/workspace/MyProj/bin/classess/com/test/*.class
Go directory bin using command:
cd C:/workspace/MyProj/bin
Step 2: Use below command to generate jar file.
jar cvf helloworld.jar com\test\hello\Hello.class com\test\orld\HelloWorld.class
Using the above command the classes will be placed in a jar in a directory structure.
Well if you know the basics behind them, it shouldn't be too hard.
Generally you create an array called "buckets" that contain the key and value, with an optional pointer to create a linked list.
When you access the hash table with a key, you process the key with a custom hash function which will return an integer. You then take the modulus of the result and that is the location of your array index or "bucket". Then you check the unhashed key with the stored key, and if it matches, then you found the right place.
Otherwise, you've had a "collision" and must crawl through the linked list and compare keys until you match. (note some implementations use a binary tree instead of linked list for collisions).
Check out this fast hash table implementation:
Another option is to create your own custom collation. You can then set that collation on the column or add it to your select clauses. It will be used for ordering and comparisons.
This can be used to make 'VOILA' LIKE 'voilà'.
http://www.sqlite.org/capi3ref.html#sqlite3_create_collation
The collating function must return an integer that is negative, zero, or positive if the first string is less than, equal to, or greater than the second, respectively.
Add following rule to tr and it should work
float: left
Sample (Open it in IE9 offcourse :) ): http://jsfiddle.net/zshmN/
EDIT: This isn't a legal or correct solution as pointed out by many, but if you are left with no option and need something this will work in IE9.
So all those who are giving down votes, please let us know correct solution as well
Not your code is the problem this is perfectly fine:
gray = cv2.cvtColor(imgUMat, cv2.COLOR_RGB2GRAY)
The problem is that imgUMat is None
so you probably made a mistake when loading your image:
imgUMat = cv2.imread("your_image.jpg")
I suspect you just entered the wrong image path.
Steps to Delete 1 or more Topics in Kafka
1. Go to {kafka_home}/config/server.properties
2. Uncomment delete.topic.enable=true
kafka-topics.sh --delete --zookeeper localhost:2181 --topic
(good for testing purposes, where i created multiple topics & had to delete them for different scenarios)
bin/kafka-topics.sh --list --zookeeper localhost:2181
if no topics are listed then the all topics have been deleted successfully.If topics are listed, then the delete was not successful. Try the above steps again or restart your computer.
This technique worked for me:
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<String>(requestJson, headers);
ResponseEntity<String> response = restTemplate.put(url, entity);
I hope this helps
Use these following commands, this will solve the error:
sudo apt-get install postgresql
then fire:
sudo apt-get install python-psycopg2
and last:
sudo apt-get install libpq-dev
You need to seed your PRNG so it starts with a different value each time.
A simple but low quality seed is to use the current time:
srand(time(0));
This will get you started but is considered low quality (i.e. for example, don't use that if you are trying to generate RSA keys).
Background. Pseudo-random number generators do not create true random number sequences but just simulate them. Given a starting point number, a PRNG will always return the same sequence of numbers. By default, they start with the same internal state so will return the same sequence.
To not get the same sequence, you change the internal state. The act of changing the internal state is called "seeding".
In case anyone still having trouble with the fast backswipe cancelled bug as @fabb commented in the accepted answer.
I manage to fix this by overriding viewDidLayoutSubviews
, in addition to viewWillAppear/viewWillDisappear
as shown below:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(false, animated: animated)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: animated)
}
//*** This is required to fix navigation bar forever disappear on fast backswipe bug.
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.navigationController?.setNavigationBarHidden(false, animated: false)
}
In my case, I notice that it is because the root view controller (where nav is hidden) and the pushed view controller (nav is shown) has different status bar styles (e.g. dark and light). The moment you start the backswipe to pop the view controller, there will be additional status bar colour animation. If you release your finger in order to cancel the interactive pop, while the status bar animation is not finished, the navigation bar is forever gone!
However, this bug doesn't occur if status bar styles of both view controllers are the same.
str = "hello world!";
str.Substring(10, str.Length-10)
you will need to perform the length checks else this would throw an error
I can't reproduce this issue in a simple .NET 4.0 console application:
static class Program
{
static void Main(string[] args)
{
var myDict = new Dictionary<string, string>
{
{ "key1", "value1" },
{ "key2", "value2" }
};
Console.ReadKey();
}
}
Can you try to reproduce it in a simple Console application and go from there? It seems likely that you're targeting .NET 2.0 (which doesn't support it) or client profile framework, rather than a version of .NET that supports initialization syntax.
In the current version of Web API, the usage of multiple complex objects (like your Content
and Config
complex objects) within the Web API method signature is not allowed. I'm betting good money that config
(your second parameter) is always coming back as NULL. This is because only one complex object can be parsed from the body for one request. For performance reasons, the Web API request body is only allowed to be accessed and parsed once. So after the scan and parsing occurs of the request body for the "content" parameter, all subsequent body parses will end in "NULL". So basically:
[FromBody]
.[FromUri]
.Below is a useful extract from Mike Stall's excellent blog article (oldie but goldie!). You'll want to pay attention to item 4:
Here are the basic rules to determine whether a parameter is read with model binding or a formatter:
- If the parameter has no attribute on it, then the decision is made purely on the parameter's .NET type. "Simple types" use model binding. Complex types use the formatters. A "simple type" includes: primitives,
TimeSpan
,DateTime
,Guid
,Decimal
,String
, or something with aTypeConverter
that converts from strings.- You can use a
[FromBody]
attribute to specify that a parameter should be from the body.- You can use a
[ModelBinder]
attribute on the parameter or the parameter's type to specify that a parameter should be model bound. This attribute also lets you configure the model binder.[FromUri]
is a derived instance of[ModelBinder]
that specifically configures a model binder to only look in the URI.- The body can only be read once. So if you have 2 complex types in the signature, at least one of them must have a
[ModelBinder]
attribute on it.It was a key design goal for these rules to be static and predictable.
A key difference between MVC and Web API is that MVC buffers the content (e.g. request body). This means that MVC's parameter binding can repeatedly search through the body to look for pieces of the parameters. Whereas in Web API, the request body (an
HttpContent
) may be a read-only, infinite, non-buffered, non-rewindable stream.
You can read the rest of this incredibly useful article on your own so, to cut a long story short, what you're trying to do is not currently possible in that way (meaning, you have to get creative). What follows is not a solution, but a workaround and only one possibility; there are other ways.
(Disclaimer: I've not used it myself, I'm just aware of the theory!)
One possible "solution" is to use the JObject
object. This objects provides a concrete type specifically designed for working with JSON.
You simply need to adjust the signature to accept just one complex object from the body, the JObject
, let's call it stuff
. Then, you manually need to parse properties of the JSON object and use generics to hydrate the concrete types.
For example, below is a quick'n'dirty example to give you an idea:
public void StartProcessiong([FromBody]JObject stuff)
{
// Extract your concrete objects from the json object.
var content = stuff["content"].ToObject<Content>();
var config = stuff["config"].ToObject<Config>();
. . . // Now do your thing!
}
I did say there are other ways, for example you can simply wrap your two objects in a super-object of your own creation and pass that to your action method. Or you can simply eliminate the need for two complex parameters in the request body by supplying one of them in the URI. Or ... well, you get the point.
Let me just reiterate I've not tried any of this myself, although it should all work in theory.
See tutorial here: https://www.wikigain.com/install-macos-high-sierra-virtualbox-windows/
You will get the latest Safari.
You don't need to pay for those online services!!!
Use these vbox settings to increase resolution and memory, but it is still very laggy and slow:
cd "C:\Program Files\Oracle\VirtualBox\"
VBoxManage setextradata "macOS" VBoxInternal2/EfiGraphicsResolution 1920x1080
VBoxManage modifyvm "macOS" --vram 256
which seems to be much faster: youtube.com/watch?v=K7E_UqgCFbQ (video taken down) - use google ( you need VMware + MacOs ISO image)
@edit: It is significantly faster!!!
You can use FileInfo object to get all information of your file.
FileInfo f = new FileInfo(@"C:\Hello\AnotherFolder\The File Name.PDF");
MessageBox.Show(f.Name);
MessageBox.Show(f.FullName);
MessageBox.Show(f.Extension );
MessageBox.Show(f.DirectoryName);
file_name=test.log
# set first K lines:
K=1000
# line count (N):
N=$(wc -l < $file_name)
# length of the bottom file:
L=$(( $N - $K ))
# create the top of file:
head -n $K $file_name > top_$file_name
# create bottom of file:
tail -n $L $file_name > bottom_$file_name
Also, on second thought, split will work in your case, since the first split is larger than the second. Split puts the balance of the input into the last split, so
split -l 300000 file_name
will output xaa
with 300k lines and xab
with 100k lines, for an input with 400k lines.
The basic problem here is that you are mistaking System.Environment.Exit
for return
.
Just surfed in from the web and felt I could contribute. I noticed that with the above code posted by @calethebrewer can result in multiple calls over the selector and unexpected behaviour for example: -
$(document).on('mouseover', '.selector', function() {
//do something
});
$(document).on('mouseout', '.selector', function() {
//do something
});
This fiddle http://jsfiddle.net/TWskH/12/ illustraits my point. When animating elements such as in plugins I have found that these multiple triggers result in unintended behavior which may result in the animation or code being called more than is necessary.
My suggestion is to simply replace with mouseenter/mouseleave: -
$(document).on('mouseenter', '.selector', function() {
//do something
});
$(document).on('mouseleave', '.selector', function() {
//do something
});
Although this prevented multiple instances of my animation from being called, I eventually went with mouseover/mouseleave as I needed to determine when children of the parent were being hovered over.
If you just want to remove the first two characters and the last two, then you can use negative indexes on the string:
s = "((String1))"
s = s[2...-2]
p s # => "String1"
If you want to remove all parentheses from the string you can use the delete method on the string class:
s = "((String1))"
s.delete! '()'
p s # => "String1"
ssize_t
is not included in the standard and isn't portable. size_t
should be used when handling the size of objects (there's ptrdiff_t
too, for pointer differences).
var ListByOwner = list.GroupBy(l => l.Owner)
.Select(lg =>
new {
Owner = lg.Key,
Boxes = lg.Count(),
TotalWeight = lg.Sum(w => w.Weight),
TotalVolume = lg.Sum(w => w.Volume)
});
Use lapply
function after creating your function normally.
lapply(x="your input", fun="insert your function name")
lapply
gives a list so use unlist
function to take them out of the function
unlist(lapply(a,w))
Here is my hashcode helper.
It's advantage is that it uses generic type arguments and therefore will not cause boxing:
public static class HashHelper
{
public static int GetHashCode<T1, T2>(T1 arg1, T2 arg2)
{
unchecked
{
return 31 * arg1.GetHashCode() + arg2.GetHashCode();
}
}
public static int GetHashCode<T1, T2, T3>(T1 arg1, T2 arg2, T3 arg3)
{
unchecked
{
int hash = arg1.GetHashCode();
hash = 31 * hash + arg2.GetHashCode();
return 31 * hash + arg3.GetHashCode();
}
}
public static int GetHashCode<T1, T2, T3, T4>(T1 arg1, T2 arg2, T3 arg3,
T4 arg4)
{
unchecked
{
int hash = arg1.GetHashCode();
hash = 31 * hash + arg2.GetHashCode();
hash = 31 * hash + arg3.GetHashCode();
return 31 * hash + arg4.GetHashCode();
}
}
public static int GetHashCode<T>(T[] list)
{
unchecked
{
int hash = 0;
foreach (var item in list)
{
hash = 31 * hash + item.GetHashCode();
}
return hash;
}
}
public static int GetHashCode<T>(IEnumerable<T> list)
{
unchecked
{
int hash = 0;
foreach (var item in list)
{
hash = 31 * hash + item.GetHashCode();
}
return hash;
}
}
/// <summary>
/// Gets a hashcode for a collection for that the order of items
/// does not matter.
/// So {1, 2, 3} and {3, 2, 1} will get same hash code.
/// </summary>
public static int GetHashCodeForOrderNoMatterCollection<T>(
IEnumerable<T> list)
{
unchecked
{
int hash = 0;
int count = 0;
foreach (var item in list)
{
hash += item.GetHashCode();
count++;
}
return 31 * hash + count.GetHashCode();
}
}
/// <summary>
/// Alternative way to get a hashcode is to use a fluent
/// interface like this:<br />
/// return 0.CombineHashCode(field1).CombineHashCode(field2).
/// CombineHashCode(field3);
/// </summary>
public static int CombineHashCode<T>(this int hashCode, T arg)
{
unchecked
{
return 31 * hashCode + arg.GetHashCode();
}
}
Also it has extension method to provide a fluent interface, so you can use it like this:
public override int GetHashCode()
{
return HashHelper.GetHashCode(Manufacturer, PartN, Quantity);
}
or like this:
public override int GetHashCode()
{
return 0.CombineHashCode(Manufacturer)
.CombineHashCode(PartN)
.CombineHashCode(Quantity);
}
This is not a problem with XAML. The error message is saying that it tried to create an instance of DVRClientInterface.MainWindow
and your constructor threw an exception.
You will need to look at the "Inner Exception" property to determine the underlying cause. It could be quite literally anything, but should provide direction.
An example would be that if you are connecting to a database in the constructor for your window, and for some reason that database is unavailable, the inner exception may be a TimeoutException
or a SqlException
or any other exception thrown by your database code.
If you are throwing exceptions in static constructors, the exception could be generated from any class referenced by the MainWindow
. Class initializers are also run, if any MainWindow
fields are calling a method which may throw.
You can as well look into PHP's get_browser();
http://php.net/manual/en/function.get-browser.php
Maybe you'll find it useful for more features.
Ctrl+C is what you need. If it didn't work, hit it harder. :-) Of course, you can also just close the shell window.
Edit: You didn't mention the circumstances. As a last resort, you could write a batch file that contains taskkill /im python.exe
, and put it on your desktop, Start menu, etc. and run it when you need to kill a runaway script. Of course, it will kill all Python processes, so be careful.
If you don't reference the imageBytes to carry bytes in the stream, the method won't return anything. Make sure you reference imageBytes = m.ToArray();
public static byte[] SerializeImage() {
MemoryStream m;
string PicPath = pathToImage";
byte[] imageBytes;
using (Image image = Image.FromFile(PicPath)) {
using ( m = new MemoryStream()) {
image.Save(m, image.RawFormat);
imageBytes = new byte[m.Length];
//Very Important
imageBytes = m.ToArray();
}//end using
}//end using
return imageBytes;
}//SerializeImage
Guys regarding time taken for importing huge files most importantly it takes more time is because default setting of mysql is "autocommit = true", you must set that off before importing your file and then check how import works like a gem...
First open MySQL:
mysql -u root -p
Then, You just need to do following :
mysql>use your_db
mysql>SET autocommit=0 ; source the_sql_file.sql ; COMMIT ;
To get only the name of the directory where script executed:
//Path to script: /data/html/cars/index.php
echo basename(dirname(__FILE__)); //"cars"
There might be two classes with same name "Helper" in your solution/project. Change name of one of them and then rebuild
A small variation but nothing new infact. It's really missing a feature...
select info->>'name' from rabbits
where '"carrots"' = ANY (ARRAY(
select * from json_array_elements(info->'food'))::text[]);
Another mechanism for dynamic styling is to define it in the JSX for your component. For example, the following could be used to selectively style the current step in the React tic-tac-toe tutorial (one of the suggested extra credit enhancements:
return (
<li key={move}>
<button style={{fontWeight:(move === this.state.stepNumber ? 'bold' : '')}} onClick={() => this.jumpTo(move)}>{desc}</button>
</li>
);
Granted, a cleaner approach would be to add/remove a 'selected' CSS class but this direct approach might be helpful in some cases.
Use SelectTab
like this:
TabPage t = tabControl1.TabPages[2];
tabControl1.SelectTab(t); //go to tab
Use SelectedTab
like this:
TabPage t = tabControl1.TabPages[2];
tabControl1.SelectedTab = t; //go to tab
As others have already noted, pre-increment is usually faster than post-increment for user-defined types. To understand why this is so, look at the typical code pattern to implement both operators:
Foo& operator++()
{
some_member.increase();
return *this;
}
Foo operator++(int dummy_parameter_indicating_postfix)
{
Foo copy(*this);
++(*this);
return copy;
}
As you can see, the prefix version simply modifies the object and returns it by reference.
The postfix version, on the other hand, must make a copy before the actual increment is performed, and then that copy is copied back to the caller by value. It is obvious from the source code that the postfix version must do more work, because it includes a call to the prefix version: ++(*this);
For built-in types, it does not make any difference as long as you discard the value, i.e. as long as you do not embed ++i
or i++
in a larger expression such as a = ++i
or b = i++
.
Although not a "technique", I couldn't figure out how Win32 projects with many source files compiled faster than my "Hello World" empty project. Thus, I hope this helps someone like it did me.
In Visual Studio, one option to increase compile times is Incremental Linking (/INCREMENTAL). It's incompatible with Link-time Code Generation (/LTCG) so remember to disable incremental linking when doing release builds.
HttpClient is the newer of the APIs and it has the benefits of
If you are writing a web service which is making REST calls to other web services, you should want to be using an async programming model for all your REST calls, so that you don't hit thread starvation. You probably also want to use the newest C# compiler which has async/await support.
Note: It isn't more performant AFAIK. It's probably somewhat similarly performant if you create a fair test.
For anyone meaning to do this more reliably for different Minecraft versions, I have a Python script (adapted from parts of minecraft-launcher-lib) that does the job very nicely
Besides setting some basic variables near the top after the functions, it calls a get_classpath
that goes through for example ~/.minecraft/versions/1.16.5/1.16.5.json
, and loops over the libraries
array, checking to see if each object (within the array), is supposed to be added to the classpath (cp
variable). whether this library is added to the java classpath is governed by the should_use_library
function, deterministic based on the computer's architecture and operating system. finally, some jarfiles that are platform specific have extra things prepended to them (ex. natives-linux
in org/lwjgl/lwjgl/3.2.1/lwjgl-3.2.1-natives-linux.jar
). this extra prepended string is handled by get_natives_string
and is empty if it doesn't apply to the current library
tested on Linux, distribution Arch Linux
#!/usr/bin/env python
import json
import os
import platform
from pathlib import Path
import subprocess
"""Debug output
"""
def debug(str):
if os.getenv('DEBUG') != None:
print(str)
"""
[Gets the natives_string toprepend to the jar if it exists. If there is nothing native specific, returns and empty string]
"""
def get_natives_string(lib):
arch = ""
if platform.architecture()[0] == "64bit":
arch = "64"
elif platform.architecture()[0] == "32bit":
arch = "32"
else:
raise Exception("Architecture not supported")
nativesFile=""
if not "natives" in lib:
return nativesFile
# i've never seen ${arch}, but leave it in just in case
if "windows" in lib["natives"] and platform.system() == 'Windows':
nativesFile = lib["natives"]["windows"].replace("${arch}", arch)
elif "osx" in lib["natives"] and platform.system() == 'Darwin':
nativesFile = lib["natives"]["osx"].replace("${arch}", arch)
elif "linux" in lib["natives"] and platform.system() == "Linux":
nativesFile = lib["natives"]["linux"].replace("${arch}", arch)
else:
raise Exception("Platform not supported")
return nativesFile
"""[Parses "rule" subpropery of library object, testing to see if should be included]
"""
def should_use_library(lib):
def rule_says_yes(rule):
useLib = None
if rule["action"] == "allow":
useLib = False
elif rule["action"] == "disallow":
useLib = True
if "os" in rule:
for key, value in rule["os"].items():
os = platform.system()
if key == "name":
if value == "windows" and os != 'Windows':
return useLib
elif value == "osx" and os != 'Darwin':
return useLib
elif value == "linux" and os != 'Linux':
return useLib
elif key == "arch":
if value == "x86" and platform.architecture()[0] != "32bit":
return useLib
return not useLib
if not "rules" in lib:
return True
shouldUseLibrary = False
for i in lib["rules"]:
if rule_says_yes(i):
return True
return shouldUseLibrary
"""
[Get string of all libraries to add to java classpath]
"""
def get_classpath(lib, mcDir):
cp = []
for i in lib["libraries"]:
if not should_use_library(i):
continue
libDomain, libName, libVersion = i["name"].split(":")
jarPath = os.path.join(mcDir, "libraries", *
libDomain.split('.'), libName, libVersion)
native = get_natives_string(i)
jarFile = libName + "-" + libVersion + ".jar"
if native != "":
jarFile = libName + "-" + libVersion + "-" + native + ".jar"
cp.append(os.path.join(jarPath, jarFile))
cp.append(os.path.join(mcDir, "versions", lib["id"], f'{lib["id"]}.jar'))
return os.pathsep.join(cp)
version = '1.16.5'
username = '{username}'
uuid = '{uuid}'
accessToken = '{token}'
mcDir = os.path.join(os.getenv('HOME'), '.minecraft')
nativesDir = os.path.join(os.getenv('HOME'), 'versions', version, 'natives')
clientJson = json.loads(
Path(os.path.join(mcDir, 'versions', version, f'{version}.json')).read_text())
classPath = get_classpath(clientJson, mcDir)
mainClass = clientJson['mainClass']
versionType = clientJson['type']
assetIndex = clientJson['assetIndex']['id']
debug(classPath)
debug(mainClass)
debug(versionType)
debug(assetIndex)
subprocess.call([
'/usr/bin/java',
f'-Djava.library.path={nativesDir}',
'-Dminecraft.launcher.brand=custom-launcher',
'-Dminecraft.launcher.version=2.1',
'-cp',
classPath,
'net.minecraft.client.main.Main',
'--username',
username,
'--version',
version,
'--gameDir',
mcDir,
'--assetsDir',
os.path.join(mcDir, 'assets'),
'--assetIndex',
assetIndex,
'--uuid',
uuid,
'--accessToken',
accessToken,
'--userType',
'mojang',
'--versionType',
'release'
])
Similar to Bass, I had to also set the overflow-y. That could actually be done in the CSS
$('#myModal').on('show.bs.modal', function () {
$('.modal .modal-body').css('overflow-y', 'auto');
$('.modal .modal-body').css('max-height', $(window).height() * 0.7);
});
I would apply this rule to all input fields of type text, so it doesn't need to be duplicated later:
input[type=text]::-ms-clear { display: none; }
One can even get less specific by using just:
::-ms-clear { display: none; }
I have used the later even before adding this answer, but thought that most people would prefer to be more specific than that. Both solutions work fine.
Nginx prefers prefix-based location matches (not involving regular expression), that's why in your code block, /stash redirects are going to /.
The algorithm used by Nginx to select which location to use is described thoroughly here: https://www.digitalocean.com/community/tutorials/understanding-nginx-server-and-location-block-selection-algorithms#matching-location-blocks
It's legal, but sometimes it cause undesired behaviour. As an Example I used the MagicSuggest library and added two MagicSuggest inputs in a page of my project and used seperate document ready functions for each initializations of inputs. The very first Input initialization worked, but not the second one and also not giving any error, Second Input didn't show up. So, I always recommend to use one Document Ready Function.
@Stephen tks this resolved for me. I just need to go --> File --> WorspaceSettings --> Build Settings(change here to "Legacy Build System")
I would like to add that .m2 folder a lot of people say it is in your home folder. It is right. But if use maven from ready to go IDE like Spring STS then your .m2 folder is placed in root folder
To access root folder you need to switch to super user account
sudo su
Go to root folder
cd root/
You will find it by
cd -all
So, it isn't quite true that you cannot add link attributes to a Markdown URL. To add attributes, check with the underlying markdown parser being used and what their extensions are.
In particular, pandoc
has an extension to enable link_attributes
, which allow markup in the link. e.g.
[Hello, world!](http://example.com/){target="_blank"}
rmarkdown
, bookdown
, blogdown
and so on), this is the syntax you want. pandoc
with +link_attributes
Note: This is different than the kramdown
parser's support, which is one the accepted answers above. In particular, note that kramdown differs from pandoc since it requires a colon -- :
-- at the start of the curly brackets -- {}
, e.g.
[link](http://example.com){:hreflang="de"}
In particular:
# Pandoc
{ attribute1="value1" attribute2="value2"}
# Kramdown
{: attribute1="value1" attribute2="value2"}
^
^ Colon
I'm also coming from Ruby so I love the syntax foo ||= 7
.
This is the closest thing I can find.
foo = foo if 'foo' in vars() else 7
I've seen people do this for a dict:
try:
foo['bar']
except KeyError:
foo['bar'] = 7
Upadate: However, I recently found this gem:
foo['bar'] = foo.get('bar', 7)
If you like that, then for a regular variable you could do something like this:
vars()['foo'] = vars().get('foo', 7)
I always thought this was one of the better articles on the subject. It includes the following example that I think makes it clear and includes the frequently overlooked @@trancount which is needed for reliable nested transactions
PRINT 'BEFORE TRY'
BEGIN TRY
BEGIN TRAN
PRINT 'First Statement in the TRY block'
INSERT INTO dbo.Account(AccountId, Name , Balance) VALUES(1, 'Account1', 10000)
UPDATE dbo.Account SET Balance = Balance + CAST('TEN THOUSAND' AS MONEY) WHERE AccountId = 1
INSERT INTO dbo.Account(AccountId, Name , Balance) VALUES(2, 'Account2', 20000)
PRINT 'Last Statement in the TRY block'
COMMIT TRAN
END TRY
BEGIN CATCH
PRINT 'In CATCH Block'
IF(@@TRANCOUNT > 0)
ROLLBACK TRAN;
THROW; -- raise error to the client
END CATCH
PRINT 'After END CATCH'
SELECT * FROM dbo.Account WITH(NOLOCK)
GO
No, I don't think there is. Unfortunately, you're stuck calling getApplicationContext()
from Activity
or one of the other subclasses of Context
. Also, this question is somewhat related.
Use empty()
:
std::string s;
if (s.empty())
// nothing in s
Use -regex not -name, and be aware that the regex matches against what find would print, e.g. "/home/test/test.log" not "test.log"
Simple XML http://simple.sourceforge.net/ is very easy for (de)serializing objects.
This will make whole <li>
object as a link :
<li onclick="location.href='page.html';" style="cursor:pointer;">...</li>
What about -mmin
?
find /var/www/html/audio -daystart -maxdepth 1 -mmin +59 -type f -name "*.mp3" \
-exec rm -f {} \;
From man find:
-mmin n File's data was last modified n minutes ago.
Also, make sure to test this first!
... -exec echo rm -f '{}' \; ^^^^ Add the 'echo' so you just see the commands that are going to get run instead of actual trying them first.
Just another answer that is similar to @zer0chain's answer. However, with one distinction.
webpack -p
is sufficient.It is the same as:
--define process.env.NODE_ENV="production"
And this is the same as
// webpack.config.js
const webpack = require('webpack');
module.exports = {
//...
plugins:[
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify('production')
})
]
};
So you may only need something like this in package.json
Node file:
{
"name": "projectname",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"debug": "webpack -d",
"production": "webpack -p"
},
"author": "prosti",
"license": "ISC",
"dependencies": {
"webpack": "^2.2.1",
...
}
}
Just a few tips from the DefinePlugin:
The DefinePlugin allows you to create global constants which can be configured at compile time. This can be useful for allowing different behavior between development builds and release builds. For example, you might use a global constant to determine whether logging takes place; perhaps you perform logging in your development build but not in the release build. That's the sort of scenario the DefinePlugin facilitates.
That this is so you can check if you type webpack --help
Config options:
--config Path to the config file
[string] [default: webpack.config.js or webpackfile.js]
--env Enviroment passed to the config, when it is a function
Basic options:
--context The root directory for resolving entry point and stats
[string] [default: The current directory]
--entry The entry point [string]
--watch, -w Watch the filesystem for changes [boolean]
--debug Switch loaders to debug mode [boolean]
--devtool Enable devtool for better debugging experience (Example:
--devtool eval-cheap-module-source-map) [string]
-d shortcut for --debug --devtool eval-cheap-module-source-map
--output-pathinfo [boolean]
-p shortcut for --optimize-minimize --define
process.env.NODE_ENV="production"
[boolean]
--progress Print compilation progress in percentage [boolean]
Because this is the top result on google on jquery ui and bootstrap.js I decided to add this as community wiki.
I am using:
and somehow when I include bootstrap.js it disables the dropdown of the jquery ui autocomplete.
my three workarounds:
To fix this, open the SQL Server Management Studio and click New Query. Then type:
USE mydatabase
exec sp_changedbowner 'sa', 'true'
Try this, its working in FF
body,
input,
select,
button {
font-family: Arial,Helvetica,sans-serif;
font-size: 14px;
}
Why not measure it:
class Program
{
class NameComparer : IComparer<string>
{
public int Compare(string x, string y)
{
return string.Compare(x, y, true);
}
}
class Person
{
public Person(string id, string name)
{
Id = id;
Name = name;
}
public string Id { get; set; }
public string Name { get; set; }
}
static void Main()
{
List<Person> persons = new List<Person>();
persons.Add(new Person("P005", "Janson"));
persons.Add(new Person("P002", "Aravind"));
persons.Add(new Person("P007", "Kazhal"));
Sort(persons);
OrderBy(persons);
const int COUNT = 1000000;
Stopwatch watch = Stopwatch.StartNew();
for (int i = 0; i < COUNT; i++)
{
Sort(persons);
}
watch.Stop();
Console.WriteLine("Sort: {0}ms", watch.ElapsedMilliseconds);
watch = Stopwatch.StartNew();
for (int i = 0; i < COUNT; i++)
{
OrderBy(persons);
}
watch.Stop();
Console.WriteLine("OrderBy: {0}ms", watch.ElapsedMilliseconds);
}
static void Sort(List<Person> list)
{
list.Sort((p1, p2) => string.Compare(p1.Name, p2.Name, true));
}
static void OrderBy(List<Person> list)
{
var result = list.OrderBy(n => n.Name, new NameComparer()).ToArray();
}
}
On my computer when compiled in Release mode this program prints:
Sort: 1162ms
OrderBy: 1269ms
UPDATE:
As suggested by @Stefan here are the results of sorting a big list fewer times:
List<Person> persons = new List<Person>();
for (int i = 0; i < 100000; i++)
{
persons.Add(new Person("P" + i.ToString(), "Janson" + i.ToString()));
}
Sort(persons);
OrderBy(persons);
const int COUNT = 30;
Stopwatch watch = Stopwatch.StartNew();
for (int i = 0; i < COUNT; i++)
{
Sort(persons);
}
watch.Stop();
Console.WriteLine("Sort: {0}ms", watch.ElapsedMilliseconds);
watch = Stopwatch.StartNew();
for (int i = 0; i < COUNT; i++)
{
OrderBy(persons);
}
watch.Stop();
Console.WriteLine("OrderBy: {0}ms", watch.ElapsedMilliseconds);
Prints:
Sort: 8965ms
OrderBy: 8460ms
In this scenario it looks like OrderBy performs better.
UPDATE2:
And using random names:
List<Person> persons = new List<Person>();
for (int i = 0; i < 100000; i++)
{
persons.Add(new Person("P" + i.ToString(), RandomString(5, true)));
}
Where:
private static Random randomSeed = new Random();
public static string RandomString(int size, bool lowerCase)
{
var sb = new StringBuilder(size);
int start = (lowerCase) ? 97 : 65;
for (int i = 0; i < size; i++)
{
sb.Append((char)(26 * randomSeed.NextDouble() + start));
}
return sb.ToString();
}
Yields:
Sort: 8968ms
OrderBy: 8728ms
Still OrderBy is faster
I needed to just download a file onClick but I needed to run some logic to either fetch or compute the actual url where the file existed. I also did not want to use any anti-react imperative patterns like setting a ref and manually clicking it when I had the resource url. The declarative pattern I used was
onClick = () => {
// do something to compute or go fetch
// the url we need from the server
const url = goComputeOrFetchURL();
// window.location forces the browser to prompt the user if they want to download it
window.location = url
}
render() {
return (
<Button onClick={ this.onClick } />
);
}
Depends on what you care about. If you mean WALL TIME (as in, the time on the clock on your wall), time.clock() provides NO accuracy because it may manage CPU time.
Try this
If @NewStatus = 'InOffice'
BEGIN
Update tblEmployee set InOffice = -1 where EmpID = @EmpID
END
Else If @NewStatus = 'OutOffice'
BEGIN
Update tblEmployee set InOffice = -1 where EmpID = @EmpID
END
Else If @NewStatus = 'Home'
BEGIN
Update tblEmployee set Home = -1 where EmpID = @EmpID
END
What just worked for was to delete the settings.xml in the .m2 folder: this file was telling the project to look for a versión of spring mvc and web that didn't exist.
Best practice says to implement it by your own using local boolean field: http://www.niedermann.dk/2009/06/18/BestPracticeDisposePatternC.aspx
Java also does not use line numbers, which is a necessity for a GOTO function. Unlike C/C++, Java does not have goto statement, but java supports label. The only place where a label is useful in Java is right before nested loop statements. We can specify label name with break to break out a specific outer loop.
This provides you with the possibility of adding conditions on the rows and then change all the cells of a specific column corresponding to those rows:
df.loc[(df['issueid'] == '001'), 'industry'] = str('yyy')
I had the same problem but it only occurred on the published website on Godaddy. It was no problem in my local host.
The error came from an aspx.cs (code behind file) where I tried to assign a value to a label. It appeared that from within the code behind, that the label Text appears to be null. So all I did with change all my Label Text properties in the ASPX file from Text="" to Text=" ".
The problem disappeared. I don’t know why the error happens from the hosted version but not on my localhost and don’t have time to figure out why. But it works fine now.
When you are editing a table
Right Click -> Check Constraints -> Add -> Type something like Frequency IN ('Daily', 'Weekly', 'Monthly', 'Yearly')
in expression field and a good constraint name in (Name) field.
You are done.
import re
def filerev(somefile, buffer=0x20000):
somefile.seek(0, os.SEEK_END)
size = somefile.tell()
lines = ['']
rem = size % buffer
pos = max(0, (size // buffer - 1) * buffer)
while pos >= 0:
somefile.seek(pos, os.SEEK_SET)
data = somefile.read(rem + buffer) + lines[0]
rem = 0
lines = re.findall('[^\n]*\n?', data)
ix = len(lines) - 2
while ix > 0:
yield lines[ix]
ix -= 1
pos -= buffer
else:
yield lines[0]
with open(sys.argv[1], 'r') as f:
for line in filerev(f):
sys.stdout.write(line)
select DATEDIFF(dd, '12/30/1899', mydatefield)
I had a similar problem - essentially I was getting a NPE in an async task after the user had destroyed the activity. After researching the problem on Stack Overflow, I adopted the following solution:
volatile boolean running;
public void onActivityCreated (Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
running=true;
...
}
public void onDestroy() {
super.onDestroy();
running=false;
...
}
Then, I check "if running" periodically in my async code. I have stress tested this and I am now unable to "break" my activity. This works perfectly and has the advantage of being simpler than some of the solutions I have seen on SO.
I had a similar problem as you. What I did is that I use something called jQuery. What you then do in the javascript code is this:
$(function(){ //this is regular jQuery code. It waits for the dom to load fully the first time you open the page.
$("#myIframeId").load(function(){
callback($("#myIframeId").html());
$("#myIframeId").remove();
});
});
It seems as you delete you iFrame before you grab the html from it. Now, I do see a problem with that :p
Hope this helps :).
Additionally, you cannot use "null" as a value in a conditional assignment. e.g...
bool testvalue = false;
int? myint = (testvalue == true) ? 1234 : null;
FAILS with: Type of conditional expression cannot be determined because there is no implicit conversion between 'int' and '<null>'.
So, you have to cast the null as well... This works:
int? myint = (testvalue == true) ? 1234 : (int?)null;
If you are creating the URL from the server side of an ASP.NET application, and deploying your website to a virtual directory (e.g. app2) in your website i.e. http://www.yourwebsite.com/app2/
then just insert
<base href="~/" />
just after the title tag.
so whenever you use root relative e.g.
<a href="/Accounts/Login"/>
would resolve to "http://www.yourwebsite.com/app2/Accounts/Login"
This way you can always point to your files relatively-absolutely ;)
To me this is the most flexible solution.
in Appdelegate, put this code to see Document and Cache Dir:
#if TARGET_IPHONE_SIMULATOR
NSLog(@"Documents Directory: %@", [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]);
NSArray* cachePathArray = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString* cachePath = [cachePathArray lastObject];
NSLog(@"Cache Directory: %@", cachePath);
#endif
on Log:
Documents Directory: /Users/xxx/Library/Developer/CoreSimulator/Devices/F90BBF76-C3F8-4040-9C1E-448FAE38FA5E/data/Containers/Data/Application/3F3F6E12-EDD4-4C46-BFC3-58EB64D4BCCB/Documents/
Cache Directory: /Users/xxx/Library/Developer/CoreSimulator/Devices/F90BBF76-C3F8-4040-9C1E-448FAE38FA5E/data/Containers/Data/Application/3F3F6E12-EDD4-4C46-BFC3-58EB64D4BCCB/Library/Caches
There is now a great plugin for Firebug that clones this nice feature in chrome. Check out:
https://addons.mozilla.org/en-US/firefox/addon/firestorage-plus/
It's developed by Nick Belhomme and updated regularly
I am using Laravel 5.4 and response()->file('path/to/file.ext')
to open e.g. a pdf in inline-mode in browsers. This works quite well, but when a user wants to save the file, the save-dialog suggests the last part of the url as filename.
I already tried adding a headers-array like mentioned in the Laravel-docs, but this doesn't seem to override the header set by the file()-method:
return response()->file('path/to/file.ext', [
'Content-Disposition' => 'inline; filename="'. $fileNameFromDb .'"'
]);
You could use with open("path") as file:
so that it automatically closes, else if it's open in another process you can maybe try
as in Tims example you should use except IOError to not ignore any other problem with your code :)
try:
with open("path", "r") as file: # or just open
# Code here
except IOError:
# raise error or print
As a general rule (i.e. in vanilla kernels), fork
/clone
failures with ENOMEM
occur specifically because of either an honest to God out-of-memory condition (dup_mm
, dup_task_struct
, alloc_pid
, mpol_dup
, mm_init
etc. croak), or because security_vm_enough_memory_mm
failed you while enforcing the overcommit policy.
Start by checking the vmsize of the process that failed to fork, at the time of the fork attempt, and then compare to the amount of free memory (physical and swap) as it relates to the overcommit policy (plug the numbers in.)
In your particular case, note that Virtuozzo has additional checks in overcommit enforcement. Moreover, I'm not sure how much control you truly have, from within your container, over swap and overcommit configuration (in order to influence the outcome of the enforcement.)
Now, in order to actually move forward I'd say you're left with two options:
NOTE that the coding effort may be all for naught if it turns out that it's not you, but some other guy collocated in a different instance on the same server as you running amock.
Memory-wise, we already know that subprocess.Popen
uses fork
/clone
under the hood, meaning that every time you call it you're requesting once more as much memory as Python is already eating up, i.e. in the hundreds of additional MB, all in order to then exec
a puny 10kB executable such as free
or ps
. In the case of an unfavourable overcommit policy, you'll soon see ENOMEM
.
Alternatives to fork
that do not have this parent page tables etc. copy problem are vfork
and posix_spawn
. But if you do not feel like rewriting chunks of subprocess.Popen
in terms of vfork
/posix_spawn
, consider using suprocess.Popen
only once, at the beginning of your script (when Python's memory footprint is minimal), to spawn a shell script that then runs free
/ps
/sleep
and whatever else in a loop parallel to your script; poll the script's output or read it synchronously, possibly from a separate thread if you have other stuff to take care of asynchronously -- do your data crunching in Python but leave the forking to the subordinate process.
HOWEVER, in your particular case you can skip invoking ps
and free
altogether; that information is readily available to you in Python directly from procfs
, whether you choose to access it yourself or via existing libraries and/or packages. If ps
and free
were the only utilities you were running, then you can do away with subprocess.Popen
completely.
Finally, whatever you do as far as subprocess.Popen
is concerned, if your script leaks memory you will still hit the wall eventually. Keep an eye on it, and check for memory leaks.
First, in Python, if your code is CPU-bound, multithreading won't help, because only one thread can hold the Global Interpreter Lock, and therefore run Python code, at a time. So, you need to use processes, not threads.
This is not true if your operation "takes forever to return" because it's IO-bound—that is, waiting on the network or disk copies or the like. I'll come back to that later.
Next, the way to process 5 or 10 or 100 items at once is to create a pool of 5 or 10 or 100 workers, and put the items into a queue that the workers service. Fortunately, the stdlib multiprocessing
and concurrent.futures
libraries both wraps up most of the details for you.
The former is more powerful and flexible for traditional programming; the latter is simpler if you need to compose future-waiting; for trivial cases, it really doesn't matter which you choose. (In this case, the most obvious implementation with each takes 3 lines with futures
, 4 lines with multiprocessing
.)
If you're using 2.6-2.7 or 3.0-3.1, futures
isn't built in, but you can install it from PyPI (pip install futures
).
Finally, it's usually a lot simpler to parallelize things if you can turn the entire loop iteration into a function call (something you could, e.g., pass to map
), so let's do that first:
def try_my_operation(item):
try:
api.my_operation(item)
except:
print('error with item')
Putting it all together:
executor = concurrent.futures.ProcessPoolExecutor(10)
futures = [executor.submit(try_my_operation, item) for item in items]
concurrent.futures.wait(futures)
If you have lots of relatively small jobs, the overhead of multiprocessing might swamp the gains. The way to solve that is to batch up the work into larger jobs. For example (using grouper
from the itertools
recipes, which you can copy and paste into your code, or get from the more-itertools
project on PyPI):
def try_multiple_operations(items):
for item in items:
try:
api.my_operation(item)
except:
print('error with item')
executor = concurrent.futures.ProcessPoolExecutor(10)
futures = [executor.submit(try_multiple_operations, group)
for group in grouper(5, items)]
concurrent.futures.wait(futures)
Finally, what if your code is IO bound? Then threads are just as good as processes, and with less overhead (and fewer limitations, but those limitations usually won't affect you in cases like this). Sometimes that "less overhead" is enough to mean you don't need batching with threads, but you do with processes, which is a nice win.
So, how do you use threads instead of processes? Just change ProcessPoolExecutor
to ThreadPoolExecutor
.
If you're not sure whether your code is CPU-bound or IO-bound, just try it both ways.
Can I do this for multiple functions in my python script? For example, if I had another for loop elsewhere in the code that I wanted to parallelize. Is it possible to do two multi threaded functions in the same script?
Yes. In fact, there are two different ways to do it.
First, you can share the same (thread or process) executor and use it from multiple places with no problem. The whole point of tasks and futures is that they're self-contained; you don't care where they run, just that you queue them up and eventually get the answer back.
Alternatively, you can have two executors in the same program with no problem. This has a performance cost—if you're using both executors at the same time, you'll end up trying to run (for example) 16 busy threads on 8 cores, which means there's going to be some context switching. But sometimes it's worth doing because, say, the two executors are rarely busy at the same time, and it makes your code a lot simpler. Or maybe one executor is running very large tasks that can take a while to complete, and the other is running very small tasks that need to complete as quickly as possible, because responsiveness is more important than throughput for part of your program.
If you don't know which is appropriate for your program, usually it's the first.
If you are responsible for encoding the data in PHP using urlencode, PHP's rawurlencode works with JavaScript's decodeURIComponent without needing to replace the + character.
just pass the img file object which is obtained by the input element when we select the correct file it will give the netural height and width of image
function getNeturalHeightWidth(file) {
let h, w;
let reader = new FileReader();
reader.onload = () => {
let tmpImgNode = document.createElement("img");
tmpImgNode.onload = function() {
h = this.naturalHeight;
w = this.naturalWidth;
};
tmpImgNode.src = reader.result;
};
reader.readAsDataURL(file);
}
return h, w;
}
I've made a jQuery plugin for the equivalent of
<pre>
<?php echo print_r($data) ?>
</pre>
You can download it at https://github.com/tomasvanrijsse/jQuery.dump
Add the full link, with:
"http://"
to the beginning of a line, and most decent email clients will auto-link it either before sending, or at the other end when receiving.
For really long urls that will likely wrap due to all the parameters, wrap the link in a less than/greater than symbol. This tells the email client not to wrap the url.
e.g.
<http://www.example.com/foo.php?this=a&really=long&url=with&lots=and&lots=and&lots=of&prameters=on_it>
Im using this version:
exampleArr: Array<{ id: number, msg: string}> = [
{ id: 1, msg: 'message'},
{ id: 2, msg: 'message2'}
]
It is a little bit similar to the other suggestions but still easy and quite good to remember.
You can do
df['column'] = None #This works. This will create a new column with None type
df.column = None #This will work only when the column is already present in the dataframe
in regard of answer from @Perception, its true to be very memory-consuming when working with byte arrays, but you could also simply write back into the outputstream
@Path("/picture")
public class ProfilePicture {
@GET
@Path("/thumbnail")
@Produces("image/png")
public StreamingOutput getThumbNail() {
return new StreamingOutput() {
@Override
public void write(OutputStream os) throws IOException, WebApplicationException {
//... read your stream and write into os
}
};
}
}
The following worked for me after hours of trying
$http.post("http://localhost:8080/yourresource", parameter, {headers:
{'Content-Type': 'application/json', 'Access-Control-Allow-Origin': '*' } }).
However following code did not work, I am unclear as to why, hopefully someone can improve this answer.
$http({ method: 'POST', url: "http://localhost:8080/yourresource",
parameter,
headers: {'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'POST'}
})
Dont use a foreach then. Use a 'for loop'. Your code is a bit messed up but you could do something like...
for (Int32 i = 0; i < dt_pattern.Rows.Count; i++)
{
double yATmax = ToDouble(dt_pattern.Rows[i+1]["Ampl"].ToString()) + AT;
}
Note you would have to take into account during the last row there will be no 'i+1' so you will have to use an if statement to catch that.
If you find it more understandable, you can do something like this with Java 8 :
public static final Predicate<Object> isInstanceOfTheClass =
objectToTest -> objectToTest instanceof TheClass;
public static final Predicate<Object> isNotInstanceOfTheClass =
isInstanceOfTheClass.negate(); // or objectToTest -> !(objectToTest instanceof TheClass)
if (isNotInstanceOfTheClass.test(myObject)) {
// do something
}
If you can't just use filter join but need to perform some operations on the array's entry:
{% for entry in array %}
User {{ entry.attribute1 }} has id {{ entry.attribute2 }}
{% if not loop.last %}, {% endif %}
{% endfor %}
You can alternatively use NamedParameterJdbcTemplate
(naming can be useful when you have many parameters)
Map<String, Object> params = new HashMap<>();
params.put("var1",value1);
params.put("var2",value2);
namedJdbcTemplate.update(
"INSERT INTO schema.tableName (column1, column2) VALUES (:var1, :var2)",
params
);
In this scenario, the outer <div>
has a width and height of 90%. The inner div>
has a width of 100% of its parent. Both scale when re-sizing the window.
HTML
<div>
<div>Hello there</div>
</div>
CSS
html, body {
width: 100%;
height: 100%;
}
body > div {
width: 90%;
height: 100%;
background: green;
}
body > div > div {
width: 100%;
background: red;
}
Demo
First off, it's not JSON: JSON mandates that all keys must be strings.
Secondly, regular arrays do what you want:
var Game = {
status: [
[
"val",
"val",
"val"
],
[
"val",
"val",
"val"
]
}
will work, if you use Game.status[0][0]
. You cannot use numbers with the dot notation (.0
).
Alternatively, you can quote the numbers (i.e. { "0": "val" }...
); you will have plain objects instead of Arrays, but the same syntax will work.
The oracle limit is 1000 parameters. The issue has been resolved by hibernate in version 4.1.7 although by splitting the passed parameter list in sets of 500 see JIRA HHH-1123
The map file maps the unminified file to the minified file. If you make changes in the unminified file, the changes will be automatically reflected to the minified version of the file.
Mongoose does now support passing multiple document structures to Model.create. To quote their API example, it supports being passed either an array or a varargs list of objects with a callback at the end:
Candy.create({ type: 'jelly bean' }, { type: 'snickers' }, function (err, jellybean, snickers) {
if (err) // ...
});
Or
var array = [{ type: 'jelly bean' }, { type: 'snickers' }];
Candy.create(array, function (err, jellybean, snickers) {
if (err) // ...
});
Edit: As many have noted, this does not perform a true bulk insert - it simply hides the complexity of calling save
multiple times yourself. There are answers and comments below explaining how to use the actual Mongo driver to achieve a bulk insert in the interest of performance.
i think this - including null value = 0
SELECT oi.id,
SUM(nvl(oi.quantity,0) * nvl(p.price,0)) AS total_qty
FROM ORDERITEM oi
JOIN PRODUCT p ON p.id = oi.productid
WHERE oi.orderid = @OrderId
GROUP BY oi.id
create procedure <procedure_name>(p_cur out sys_refcursor) as begin open p_cur for select * from <table_name> end;
At first check the type of columns which you want to merge. You will see one of them is string where other one is int
. Then convert it to int as following code:
df["something"] = df["something"].astype(int)
merged = df.merge[df1, on="something"]
I would use a regex...
var chunkStr = function(str, chunkLength) {
return str.match(new RegExp('[\\s\\S]{1,' + +chunkLength + '}', 'g'));
}
When one uses flow_from_directory the problem is how to interpret the probability outputs. As in, how to map the probability outputs and the class labels as how flow_from_directory creates one-hot vectors is not known in prior.
We can get a dictionary that maps the class labels to the index of the prediction vector that we get as the output when we use
generator= train_datagen.flow_from_directory("train", batch_size=batch_size)
label_map = (generator.class_indices)
The label_map variable is a dictionary like this
{'class_14': 5, 'class_10': 1, 'class_11': 2, 'class_12': 3, 'class_13': 4, 'class_2': 6, 'class_3': 7, 'class_1': 0, 'class_6': 10, 'class_7': 11, 'class_4': 8, 'class_5': 9, 'class_8': 12, 'class_9': 13}
Then from this the relation can be derived between the probability scores and class names.
Basically, you can create this dictionary by this code.
from glob import glob
class_names = glob("*") # Reads all the folders in which images are present
class_names = sorted(class_names) # Sorting them
name_id_map = dict(zip(class_names, range(len(class_names))))
The variable name_id_map in the above code also contains the same dictionary as the one obtained from class_indices function of flow_from_directory.
Hope this helps!
THIS DOES NOT FORCE APPLICATION TO WORK AS ADMINISTRATOR.
This is a simplified version of the this answer, above by @NG
public bool IsUserAdministrator()
{
try
{
WindowsIdentity user = WindowsIdentity.GetCurrent();
WindowsPrincipal principal = new WindowsPrincipal(user);
return principal.IsInRole(WindowsBuiltInRole.Administrator);
}
catch
{
return false;
}
}
As of Xcode 8, you can define class properties in Obj-C. This has been added to interoperate with Swift's static properties.
Objective-C now supports class properties, which interoperate with Swift type properties. They are declared as: @property (class) NSString *someStringProperty;. They are never synthesized. (23891898)
Here is an example
@interface YourClass : NSObject
@property (class, nonatomic, assign) NSInteger currentId;
@end
@implementation YourClass
static NSInteger _currentId = 0;
+ (NSInteger)currentId {
return _currentId;
}
+ (void)setCurrentId:(NSInteger)newValue {
_currentId = newValue;
}
@end
Then you can access it like this:
YourClass.currentId = 1;
val = YourClass.currentId;
Here is a very interesting explanatory post I used as a reference to edit this old answer.
2011 Answer: (don't use this, it's terrible)
If you really really don't want to declare a global variable, there another option, maybe not very orthodox :-), but works... You can declare a "get&set" method like this, with an static variable inside:
+ (NSString*)testHolder:(NSString*)_test {
static NSString *test;
if(_test != nil) {
if(test != nil)
[test release];
test = [_test retain];
}
// if(test == nil)
// test = @"Initialize the var here if you need to";
return test;
}
So, if you need to get the value, just call:
NSString *testVal = [MyClass testHolder:nil]
And then, when you want to set it:
[MyClass testHolder:testVal]
In the case you want to be able to set this pseudo-static-var to nil, you can declare testHolder
as this:
+ (NSString*)testHolderSet:(BOOL)shouldSet newValue:(NSString*)_test {
static NSString *test;
if(shouldSet) {
if(test != nil)
[test release];
test = [_test retain];
}
return test;
}
And two handy methods:
+ (NSString*)test {
return [MyClass testHolderSet:NO newValue:nil];
}
+ (void)setTest:(NSString*)_test {
[MyClass testHolderSet:YES newValue:_test];
}
Hope it helps! Good luck.
You do not specify why you think it is wrong but I can se two dangers:
BETWEEN can be implemented differently in different databases sometimes it is including the border values and sometimes excluding, resulting in that 1 and 31 of january would end up NOTHING. You should test how you database does this.
Also, if RATE_DATE contains hours also 2010-01-31 might be translated to 2010-01-31 00:00 which also would exclude any row with an hour other that 00:00.
Ran into the same problem and was able to tweak the resize mode until I found something I was happy with. Alternative approaches include:
To prevent loss of quality while tweaking images consider working with vector graphics so you can experiment with different sizes easily. Inkscape is free tool and works well for this purpose.
This creates a "See Also" heading containing the link, i.e.:
/**
* @see <a href="http://google.com">http://google.com</a>
*/
will render as:
See Also:
http://google.com
whereas this:
/**
* See <a href="http://google.com">http://google.com</a>
*/
will create an in-line link:
This worked for me:
var message = new HttpRequestMessage(method, url);
message.Headers.TryAddWithoutValidation("user-agent", "<user agent header value>");
var client = new HttpClient();
var response = await client.SendAsync(message);
Here you can find the documentation for TryAddWithoutValidation
Just simply add or die(mysqli_error($db));
at the end of your query, this will print the mysqli error.
mysqli_query($db,"INSERT INTO stockdetails (`itemdescription`,`itemnumber`,`sellerid`,`purchasedate`,`otherinfo`,`numberofitems`,`isitdelivered`,`price`) VALUES ('$itemdescription','$itemnumber','$sellerid','$purchasedate','$otherinfo','$numberofitems','$numberofitemsused','$isitdelivered','$price')") or die(mysqli_error($db));
As a side note I'd say you are at risk of mysql injection
, check here How can I prevent SQL injection in PHP?. You should really use prepared statements to avoid any risk.
1) The reason not to prefer a shape of (R, 1)
over (R,)
is that it unnecessarily complicates things. Besides, why would it be preferable to have shape (R, 1)
by default for a length-R vector instead of (1, R)
? It's better to keep it simple and be explicit when you require additional dimensions.
2) For your example, you are computing an outer product so you can do this without a reshape
call by using np.outer
:
np.outer(M[:,0], numpy.ones((1, R)))
Use white-space: nowrap;
[1] [2] or give that link more space by setting li
's width to greater values.
[1] § 3. White Space and Wrapping: the white-space property - W3 CSS Text Module Level 3
[2] white-space - CSS: Cascading Style Sheets | MDN
Use this:
Format(Now, "MMMM dd, yyyy")
More: Format Function
char* someString = "abcdedgh";
char* otherString = 0;
otherString = (char*)malloc(5+1);
memcpy(otherString,someString,5);
otherString[5] = 0;
UPDATE:
Tip: A good way to understand definitions is called the right-left rule (some links at the end):
Start reading from identifier and say aloud => "someString
is..."
Now go to right of someString (statement has ended with a semicolon, nothing to say).
Now go left of identifier (*
is encountered) => so say "...a pointer to...".
Now go to left of "*
" (the keyword char
is found) => say "..char".
Done!
So char* someString;
=> "someString is a pointer to char".
Since a pointer simply points to a certain memory address, it can also be used as the "starting point" for an "array" of characters.
That works with anything .. give it a go:
char* s[2]; //=> s is an array of two pointers to char
char** someThing; //=> someThing is a pointer to a pointer to char.
//Note: We look in the brackets first, and then move outward
char (* s)[2]; //=> s is a pointer to an array of two char
Some links: How to interpret complex C/C++ declarations and How To Read C Declarations
I had the mysql jdbc library in both $CATALINA_HOME/lib and WEB-INF/lib, still i got this error . I needed Class.forName("com.mysql.jdbc.Driver"); to make it work.
If you are using chrome
chrome_options = Options()
chrome_options.add_argument("--start-maximized");
chrome_options.add_argument("--window-position=1367,0");
if mobile_emulation :
chrome_options.add_experimental_option("mobileEmulation", mobile_emulation)
self.driver = webdriver.Chrome('/path/to/chromedriver',
chrome_options = chrome_options)
This will result in the browser starting up on the second monitor without any annoying flicker or movements across the screen.