How to install ADB driver for any android device?
I have found a solution by myself. I use the PDANet tool to find the driver automatically.
How to download source in ZIP format from GitHub?
Even though this is fairly an old question, I have my 2 cents to share.
You can download the repo as tar.gz as well
Like the zipball link pointed by various answers here, There is a tarball link as well which downloads the content of the git repository in tar.gz format.
curl -L http://github.com/zoul/Finch/tarball/master/
A better way
Git also provides a different URL pattern where you can simply append the type of file you want to download at the end of url. This way is better if you want to process these urls in a batch or bash script.
curl -L http://github.com/zoul/Finch/archive/master.zip
curl -L http://github.com/zoul/Finch/archive/master.tar.gz
To download a specific commit or branch
Replace master with the commit-hash or the branch-name in the above urls like below.
curl -L http://github.com/zoul/Finch/archive/cfeb671ac55f6b1aba6ed28b9bc9b246e0e.zip
curl -L http://github.com/zoul/Finch/archive/cfeb671ac55f6b1aba6ed28b9bc9b246e0e.tar.gz
curl -L http://github.com/zoul/Finch/archive/your-branch-name.zip
curl -L http://github.com/zoul/Finch/archive/your-branch-name.tar.gz
git clone from another directory
In case you have space in your path, wrap it in double quotes:
$ git clone "//serverName/New Folder/Target" f1/
Can I give a default value to parameters or optional parameters in C# functions?
That is exactly how you do it in C#, but the feature was first added in .NET 4.0
Creating a PHP header/footer
You can use this for header: Important: Put the following on your PHP pages that you want to include the content.
<?php
//at top:
require('header.php');
?>
<?php
// at bottom:
require('footer.php');
?>
You can also include a navbar globaly just use this instead:
<?php
// At top:
require('header.php');
?>
<?php
// At bottom:
require('footer.php');
?>
<?php
//Wherever navbar goes:
require('navbar.php');
?>
In header.php:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
</head>
<body>
Do Not close Body or Html tags!
Include html here:
<?php
//Or more global php here:
?>
Footer.php:
Code here:
<?php
//code
?>
Navbar.php:
<p> Include html code here</p>
<?php
//Include Navbar PHP code here
?>
Benifits:
- Cleaner main php file (index.php) script.
- Change the header or footer. etc to change it on all pages with the include— Good for alerts on all pages etc...
- Time Saving!
- Faster page loads!
- you can have as many files to include as needed!
- server sided!
Convert RGB to Black & White in OpenCV
Simple binary threshold method is sufficient.
include
#include <string>
#include "opencv/highgui.h"
#include "opencv2/imgproc/imgproc.hpp"
using namespace std;
using namespace cv;
int main()
{
Mat img = imread("./img.jpg",0);//loading gray scale image
threshold(img, img, 128, 255, CV_THRESH_BINARY);//threshold binary, you can change threshold 128 to your convenient threshold
imwrite("./black-white.jpg",img);
return 0;
}
You can use GaussianBlur to get a smooth black and white image.
How to add element in Python to the end of list using list.insert?
You'll have to pass the new ordinal position to insert using len in this case:
In [62]:
a=[1,2,3,4]
a.insert(len(a),5)
a
Out[62]:
[1, 2, 3, 4, 5]
How can one see the structure of a table in SQLite?
You can query sqlite_master
SELECT sql FROM sqlite_master WHERE name='foo';
which will return a create table SQL statement, for example:
$ sqlite3 mydb.sqlite
sqlite> create table foo (id int primary key, name varchar(10));
sqlite> select sql from sqlite_master where name='foo';
CREATE TABLE foo (id int primary key, name varchar(10))
sqlite> .schema foo
CREATE TABLE foo (id int primary key, name varchar(10));
sqlite> pragma table_info(foo)
0|id|int|0||1
1|name|varchar(10)|0||0
What is a user agent stylesheet?
Some browsers use their own way to read .css files. So the right way to beat this: If you type the command line directly in the .html source code, this beats the .css file, in that way, you told the browser directly what to do and the browser is at position not to read the commands from the .css file. Remember that the commands writen in the .html file is stronger than the command in the .css.
MacOS Xcode CoreSimulator folder very big. Is it ok to delete content?
Try to run xcrun simctl delete unavailable in your terminal.
Original answer: Xcode - free to clear devices folder?
Ignoring new fields on JSON objects using Jackson
You can annotate the specific property in your POJO with @JsonIgnore.
SSL "Peer Not Authenticated" error with HttpClient 4.1
Im not a java developer but was using a java app to test a RESTful API. In order for me to fix the error I had to install the intermediate certificates in the webserver in order to make the error go away. I was using lighttpd, the original certificate was installed on an IIS server. Hope it helps. These were the certificates I had missing on the server.
- CA.crt
- UTNAddTrustServer_CA.crt
- AddTrustExternalCARoot.crt
What is simplest way to read a file into String?
Don't write your own util class to do this - I would recommend using Guava, which is full of all kinds of goodness. In this case you'd want either the Files class (if you're really just reading a file) or CharStreams for more general purpose reading. It has methods to read the data into a list of strings (readLines) or totally (toString).
It has similar useful methods for binary data too. And then there's the rest of the library...
I agree it's annoying that there's nothing similar in the standard libraries. Heck, just being able to supply a CharSet to a FileReader would make life a little simpler...
XSS prevention in JSP/Servlet web application
XSS can be prevented in JSP by using JSTL <c:out> tag or fn:escapeXml() EL function when (re)displaying user-controlled input. This includes request parameters, headers, cookies, URL, body, etc. Anything which you extract from the request object. Also the user-controlled input from previous requests which is stored in a database needs to be escaped during redisplaying.
For example:
<p><c:out value="${bean.userControlledValue}"></p>
<p><input name="foo" value="${fn:escapeXml(param.foo)}"></p>
This will escape characters which may malform the rendered HTML such as <, >, ", ' and & into HTML/XML entities such as <, >, ", ' and &.
Note that you don't need to escape them in the Java (Servlet) code, since they are harmless over there. Some may opt to escape them during request processing (as you do in Servlet or Filter) instead of response processing (as you do in JSP), but this way you may risk that the data unnecessarily get double-escaped (e.g. & becomes &amp; instead of & and ultimately the enduser would see & being presented), or that the DB-stored data becomes unportable (e.g. when exporting data to JSON, CSV, XLS, PDF, etc which doesn't require HTML-escaping at all). You'll also lose social control because you don't know anymore what the user has actually filled in. You'd as being a site admin really like to know which users/IPs are trying to perform XSS, so that you can easily track them and take actions accordingly. Escaping during request processing should only and only be used as latest resort when you really need to fix a train wreck of a badly developed legacy web application in the shortest time as possible. Still, you should ultimately rewrite your JSP files to become XSS-safe.
If you'd like to redisplay user-controlled input as HTML wherein you would like to allow only a specific subset of HTML tags like <b>, <i>, <u>, etc, then you need to sanitize the input by a whitelist. You can use a HTML parser like Jsoup for this. But, much better is to introduce a human friendly markup language such as Markdown (also used here on Stack Overflow). Then you can use a Markdown parser like CommonMark for this. It has also builtin HTML sanitizing capabilities. See also Markdown or HTML.
The only concern in the server side with regard to databases is SQL injection prevention. You need to make sure that you never string-concatenate user-controlled input straight in the SQL or JPQL query and that you're using parameterized queries all the way. In JDBC terms, this means that you should use PreparedStatement instead of Statement. In JPA terms, use Query.
An alternative would be to migrate from JSP/Servlet to Java EE's MVC framework JSF. It has builtin XSS (and CSRF!) prevention over all place. See also CSRF, XSS and SQL Injection attack prevention in JSF.
Put content in HttpResponseMessage object?
You can create your own specialised content types. For example one for Json content and one for Xml content (then just assign them to the HttpResponseMessage.Content):
public class JsonContent : StringContent
{
public JsonContent(string content)
: this(content, Encoding.UTF8)
{
}
public JsonContent(string content, Encoding encoding)
: base(content, encoding, "application/json")
{
}
}
public class XmlContent : StringContent
{
public XmlContent(string content)
: this(content, Encoding.UTF8)
{
}
public XmlContent(string content, Encoding encoding)
: base(content, encoding, "application/xml")
{
}
}
How to write subquery inside the OUTER JOIN Statement
You need the "correlation id" (the "AS SS" thingy) on the sub-select to reference the fields in the "ON" condition. The id's assigned inside the sub select are not usable in the join.
SELECT
cs.CUSID
,dp.DEPID
FROM
CUSTMR cs
LEFT OUTER JOIN (
SELECT
DEPID
,DEPNAME
FROM
DEPRMNT
WHERE
dp.DEPADDRESS = 'TOKYO'
) ss
ON (
ss.DEPID = cs.CUSID
AND ss.DEPNAME = cs.CUSTNAME
)
WHERE
cs.CUSID != ''
Replace Line Breaks in a String C#
Best way to replace linebreaks safely is
yourString.Replace("\r\n","\n") //handling windows linebreaks
.Replace("\r","\n") //handling mac linebreaks
that should produce a string with only \n (eg linefeed) as linebreaks. this code is usefull to fix mixed linebreaks too.
How to get date, month, year in jQuery UI datepicker?
what about that simple way)
$(document).ready ->
$('#datepicker').datepicker( dateFormat: 'yy-mm-dd', onSelect: (dateStr) ->
alert dateStr # yy-mm-dd
#OR
alert $("#datepicker").val(); # yy-mm-dd
NSString with \n or line break
I just ran into the same issue when overloading -description for a subclass of NSObject. In this situation I was able to use carriage return (\r) instead of newline (\n) to create a line break.
[NSString stringWithFormat:@"%@\r%@", mystring1,mystring2];
Remove a specific character using awk or sed
Using just awk you could do (I also shortened some of your piping):
strings -a libAddressDoctor5.so | awk '/EngineVersion/ { if(NR==2) { gsub("\"",""); print $2 } }'
I can't verify it for you because I don't know your exact input, but the following works:
echo "Blah EngineVersion=\"123\"" | awk '/EngineVersion/ { gsub("\"",""); print $2 }'
See also this question on removing single quotes.
How to update single value inside specific array item in redux
You don't have to do everything in one line:
case 'SOME_ACTION':
const newState = { ...state };
newState.contents =
[
newState.contents[0],
{title: newState.contnets[1].title, text: action.payload}
];
return newState
How do I make a textbox that only accepts numbers?
I've been working on a collection of components to complete missing stuff in WinForms, here it is: Advanced Forms
In particular this is the class for a Regex TextBox
/// <summary>Represents a Windows text box control that only allows input that matches a regular expression.</summary>
public class RegexTextBox : TextBox
{
[NonSerialized]
string lastText;
/// <summary>A regular expression governing the input allowed in this text field.</summary>
[Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public virtual Regex Regex { get; set; }
/// <summary>A regular expression governing the input allowed in this text field.</summary>
[DefaultValue(null)]
[Category("Behavior")]
[Description("Sets the regular expression governing the input allowed for this control.")]
public virtual string RegexString {
get {
return Regex == null ? string.Empty : Regex.ToString();
}
set {
if (string.IsNullOrEmpty(value))
Regex = null;
else
Regex = new Regex(value);
}
}
protected override void OnTextChanged(EventArgs e) {
if (Regex != null && !Regex.IsMatch(Text)) {
int pos = SelectionStart - Text.Length + (lastText ?? string.Empty).Length;
Text = lastText;
SelectionStart = Math.Max(0, pos);
}
lastText = Text;
base.OnTextChanged(e);
}
}
Simply adding something like myNumbericTextBox.RegexString = "^(\\d+|)$"; should suffice.
Subtracting Number of Days from a Date in PL/SQL
simply,
select sysdate-1 from dual
there's a bunch more info and detail here: http://www.orafaq.com/faq/how_does_one_add_a_day_hour_minute_second_to_a_date_value
What is a PDB file?
A PDB file contains information used by the debugger. It is not required to run your application and it does not need to be included in your released version.
You can disable pdb files from being created in Visual Studio. If you are building from the command line or a script then omit the /Debug switch.
compareTo() vs. equals()
When comparing for equality you should use equals(), because it expresses your intent in a clear way.
compareTo() has the additional drawback that it only works on objects that implement the Comparable interface.
This applies in general, not only for Strings.
CSS: How to position two elements on top of each other, without specifying a height?
Great answer, "mu is too short". I was seeking the exact same thing, and after reading your post I found a solution that fitted my problem.
I was having two elements of the exact same size and wanted to stack them. As each have same size, what I could do was to make
position: absolute;
top: 0px;
left: 0px;
on only the last element. This way the first element is inserted correctly, "pushing" the parents height, and the second element is placed on top.
Hopes this helps other people trying to stacking 2+ elements with same (unknown) height.
How to make EditText not editable through XML in Android?
This combination worked for me:
<EditText ... >
android:longClickable="false"
android:cursorVisible="false"
android:focusableInTouchMode="false"
</EditText>
Passing an array of parameters to a stored procedure
In SQL Server 2016 you can wrap array with [ ] and pass it as JSON see http://blogs.msdn.com/b/sqlserverstorageengine/archive/2015/09/08/passing-arrays-to-t-sql-procedures-as-json.aspx
How do I format a Microsoft JSON date?
This uses a regular expression, and it works as well:
var date = new Date(parseInt(/^\/Date\((.*?)\)\/$/.exec(jsonDate)[1], 10));
Python: Open file in zip without temporarily extracting it
In theory, yes, it's just a matter of plugging things in. Zipfile can give you a file-like object for a file in a zip archive, and image.load will accept a file-like object. So something like this should work:
import zipfile
archive = zipfile.ZipFile('images.zip', 'r')
imgfile = archive.open('img_01.png')
try:
image = pygame.image.load(imgfile, 'img_01.png')
finally:
imgfile.close()
Select All checkboxes using jQuery
Here is a simple way to do this :
Html :
<input type="checkbox" id="selectall" class="css-checkbox " name="selectall"/>Selectall<br>
<input type="checkbox" class="checkboxall" value="checkbox1"/>checkbox1<br>
<input type="checkbox" class="checkboxall" value="checkbox2"/>checkbox2<br>
<input type="checkbox" class="checkboxall" value="checkbox3"/>checkbox3<br>
jquery :
$(document).ready(function(){
$("#selectall").click(function(){
if(this.checked){
$('.checkboxall').each(function(){
$(".checkboxall").prop('checked', true);
})
}else{
$('.checkboxall').each(function(){
$(".checkboxall").prop('checked', false);
})
}
});
});
Check if a process is running or not on Windows with Python
Would you be happy with your Python command running another program to get the info?
If so, I'd suggest you have a look at PsList and all its options. For example, The following would tell you about any running iTunes process
PsList itunes
If you can work out how to interpret the results, this should hopefully get you going.
Edit:
When I'm not running iTunes, I get the following:
pslist v1.29 - Sysinternals PsList
Copyright (C) 2000-2009 Mark Russinovich
Sysinternals
Process information for CLARESPC:
Name Pid Pri Thd Hnd Priv CPU Time Elapsed Time
iTunesHelper 3784 8 10 229 3164 0:00:00.046 3:41:05.053
With itunes running, I get this one extra line:
iTunes 928 8 24 813 106168 0:00:08.734 0:02:08.672
However, the following command prints out info only about the iTunes program itself, i.e. with the -e argument:
pslist -e itunes
Best way to reverse a string
Handles all type of unicode characters
using System.Globalization;
public static string ReverseString(this string content) {
var textElementEnumerator = StringInfo.GetTextElementEnumerator(content);
var SbBuilder = new StringBuilder(content.Length);
while (textElementEnumerator.MoveNext()) {
SbBuilder.Insert(0, textElementEnumerator.GetTextElement());
}
return SbBuilder.ToString();
}
Fitting a histogram with python
Here is another solution using only matplotlib.pyplot and numpy packages.
It works only for Gaussian fitting. It is based on maximum likelihood estimation and have already been mentioned in this topic.
Here is the corresponding code :
# Python version : 2.7.9
from __future__ import division
import numpy as np
from matplotlib import pyplot as plt
# For the explanation, I simulate the data :
N=1000
data = np.random.randn(N)
# But in reality, you would read data from file, for example with :
#data = np.loadtxt("data.txt")
# Empirical average and variance are computed
avg = np.mean(data)
var = np.var(data)
# From that, we know the shape of the fitted Gaussian.
pdf_x = np.linspace(np.min(data),np.max(data),100)
pdf_y = 1.0/np.sqrt(2*np.pi*var)*np.exp(-0.5*(pdf_x-avg)**2/var)
# Then we plot :
plt.figure()
plt.hist(data,30,normed=True)
plt.plot(pdf_x,pdf_y,'k--')
plt.legend(("Fit","Data"),"best")
plt.show()
and here is the output.
Passing $_POST values with cURL
Check out the cUrl PHP documentation page. It will help much more than just with example scripts.
Removing numbers from string
Not sure if your teacher allows you to use filters but...
filter(lambda x: x.isalpha(), "a1a2a3s3d4f5fg6h")
returns-
'aaasdffgh'
Much more efficient than looping...
Example:
for i in range(10):
a.replace(str(i),'')
Wait until boolean value changes it state
This is not my prefered way to do this, cause of massive CPU consumption.
If that is actually your working code, then just keep it like that. Checking a boolean once a second causes NO measurable CPU load. None whatsoever.
The real problem is that the thread that checks the value may not see a change that has happened for an arbitrarily long time due to caching. To ensure that the value is always synchronized between threads, you need to put the volatile keyword in the variable definition, i.e.
private volatile boolean value;
Note that putting the access in a synchronized block, such as when using the notification-based solution described in other answers, will have the same effect.
catching stdout in realtime from subprocess
Your problem is:
for line in p.stdout:
print(">>> " + str(line.rstrip()))
p.stdout.flush()
the iterator itself has extra buffering.
Try doing like this:
while True:
line = p.stdout.readline()
if not line:
break
print line
Avoid "current URL string parser is deprecated" warning by setting useNewUrlParser to true
Here's how I have it. The hint didn't show on my console until I updated npm a couple of days prior.
.connect has three parameters, the URI, options, and err.
mongoose.connect(
keys.getDbConnectionString(),
{ useNewUrlParser: true },
err => {
if (err)
throw err;
console.log(`Successfully connected to database.`);
}
);
Hashmap holding different data types as values for instance Integer, String and Object
You have some variables that are different types in Java language like that:
message of type string
timestamp of type time
count of type integer
version of type integer
If you use a HashMap like:
HashMap<String,Object> yourHash = new HashMap<String,Object>();
yourHash.put("message","message");
yourHash.put("timestamp",timestamp);
yourHash.put("count ",count);
yourHash.put("version ",version);
If you want to use the yourHash:
for(String key : yourHash.keySet()){
String message = (String) yourHash.get(key);
Datetime timestamp= (Datetime) yourHash.get(key);
int timestamp= (int) yourHash.get(key);
}
Send File Attachment from Form Using phpMailer and PHP
This will work perfectly
<form method='post' enctype="multipart/form-data">
<input type='file' name='uploaded_file' id='uploaded_file' multiple='multiple' />
<input type='submit' name='upload'/>
</form>
<?php
if(isset($_POST['upload']))
{
if (isset($_FILES['uploaded_file']) && $_FILES['uploaded_file']['error'] == UPLOAD_ERR_OK)
{
if (array_key_exists('uploaded_file', $_FILES))
{
$mail->Subject = "My Subject";
$mail->Body = 'This is the body';
$uploadfile = tempnam(sys_get_temp_dir(), sha1($_FILES['uploaded_file']['name']));
if (move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $uploadfile))
$mail->addAttachment($uploadfile,$_FILES['uploaded_file']['name']);
$mail->send();
echo 'Message has been sent';
}
else
echo "The file is not uploaded. please try again.";
}
else
echo "The file is not uploaded. please try again";
}
?>
"Series objects are mutable and cannot be hashed" error
Shortly: gene_name[x] is a mutable object so it cannot be hashed. To use an object as a key in a dictionary, python needs to use its hash value, and that's why you get an error.
Further explanation:
Mutable objects are objects which value can be changed.
For example, list is a mutable object, since you can append to it. int is an immutable object, because you can't change it. When you do:
a = 5;
a = 3;
You don't change the value of a, you create a new object and make a point to its value.
Mutable objects cannot be hashed. See this answer.
To solve your problem, you should use immutable objects as keys in your dictionary. For example: tuple, string, int.
VSCode single to double quote automatic replace
It works for me to check single quote in Prettier as well tslint.autoFixOnSave as true
How do I find ' % ' with the LIKE operator in SQL Server?
I would use
WHERE columnName LIKE '%[%]%'
SQL Server stores string summary statistics for use in estimating the number of rows that will match a LIKE clause. The cardinality estimates can be better and lead to a more appropriate plan when the square bracket syntax is used.
The response to this Connect Item states
We do not have support for precise cardinality estimation in the presence of user defined escape characters. So we probably get a poor estimate and a poor plan. We'll consider addressing this issue in a future release.
An example
CREATE TABLE T
(
X VARCHAR(50),
Y CHAR(2000) NULL
)
CREATE NONCLUSTERED INDEX IX ON T(X)
INSERT INTO T (X)
SELECT TOP (5) '10% off'
FROM master..spt_values
UNION ALL
SELECT TOP (100000) 'blah'
FROM master..spt_values v1, master..spt_values v2
SET STATISTICS IO ON;
SELECT *
FROM T
WHERE X LIKE '%[%]%'
SELECT *
FROM T
WHERE X LIKE '%\%%' ESCAPE '\'
Shows 457 logical reads for the first query and 33,335 for the second.
Easy pretty printing of floats in python?
List comps are your friend.
print ", ".join("%.2f" % f for f in list_o_numbers)
Try it:
>>> nums = [9.0, 0.052999999999999999, 0.032575399999999997, 0.010892799999999999]
>>> print ", ".join("%.2f" % f for f in nums)
9.00, 0.05, 0.03, 0.01
How to Execute SQL Server Stored Procedure in SQL Developer?
If you simply need to excute your stored procedure
proc_name 'paramValue1' , 'paramValue2'...
at the same time you are executing more than one query like one select query and stored procedure you have to add
select * from tableName
EXEC proc_name paramValue1 , paramValue2...
How to set the background image of a html 5 canvas to .png image
As shown in this example, you can apply a background to a canvas element through CSS and this background will not be considered part the image, e.g. when fetching the contents through toDataURL().
Here are the contents of the example, for Stack Overflow posterity:
<!DOCTYPE HTML>
<html><head>
<meta charset="utf-8">
<title>Canvas Background through CSS</title>
<style type="text/css" media="screen">
canvas, img { display:block; margin:1em auto; border:1px solid black; }
canvas { background:url(lotsalasers.jpg) }
</style>
</head><body>
<canvas width="800" height="300"></canvas>
<img>
<script type="text/javascript" charset="utf-8">
var can = document.getElementsByTagName('canvas')[0];
var ctx = can.getContext('2d');
ctx.strokeStyle = '#f00';
ctx.lineWidth = 6;
ctx.lineJoin = 'round';
ctx.strokeRect(140,60,40,40);
var img = document.getElementsByTagName('img')[0];
img.src = can.toDataURL();
</script>
</body></html>
jQuery - Getting form values for ajax POST
var data={
userName: $('#userName').val(),
email: $('#email').val(),
//add other properties similarly
}
and
$.ajax({
type: "POST",
url: "http://rt.ja.com/includes/register.php?submit=1",
data: data
success: function(html)
{
//alert(html);
$('#userError').html(html);
$("#userError").html(userChar);
$("#userError").html(userTaken);
}
});
You dont have to bother about anything else. jquery will handle the serialization etc. also you can append the submit query string parameter submit=1 into the data json object.
scp with port number specified
You know what's cooler than -P? nothing
If you use this server more than a few times, setup/create a ~/.ssh/config file with an entry like:
Host www.myserver.com
Port 80
or
Host myserver myserver80 short any.name.u.want yes_anything well-within-reason
HostName www.myserver.com
Port 80
User username
Then you can use:
scp [email protected]:/root/file.txt .
or
scp short:/root/file.txt .
You can use anything on the "Host" line with ssh, scp, rsync, git & more
There are MANY configuration option that you can use in config files, see:
man ssh_config
How to detect READ_COMMITTED_SNAPSHOT is enabled?
Neither on SQL2005 nor 2012 does DBCC USEROPTIONS show is_read_committed_snapshot_on:
Set Option Value
textsize 2147483647
language us_english
dateformat mdy
datefirst 7
lock_timeout -1
quoted_identifier SET
arithabort SET
ansi_null_dflt_on SET
ansi_warnings SET
ansi_padding SET
ansi_nulls SET
concat_null_yields_null SET
isolation level read committed
unix sort descending order
To list files based on size in asending order.
find ./ -size +1000M -exec ls -tlrh {} \; |awk -F" " '{print $5,$9}' | sort -n\
How to normalize a NumPy array to within a certain range?
You are trying to min-max scale the values of audio between -1 and +1 and image between 0 and 255.
Using sklearn.preprocessing.minmax_scale, should easily solve your problem.
e.g.:
audio_scaled = minmax_scale(audio, feature_range=(-1,1))
and
shape = image.shape
image_scaled = minmax_scale(image.ravel(), feature_range=(0,255)).reshape(shape)
note: Not to be confused with the operation that scales the norm (length) of a vector to a certain value (usually 1), which is also commonly referred to as normalization.
Overlapping elements in CSS
You can use relative positioning to overlap your elements. However, the space they would normally occupy will still be reserved for the element:
<div style="background-color:#f00;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
<div style="background-color:#0f0;width:200px;height:100px;position:relative;top:-50px;left:50px;">
RELATIVE POSITIONED
</div>
<div style="background-color:#00f;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
In the example above, there will be a block of white space between the two 'DEFAULT POSITIONED' elements. This is caused, because the 'RELATIVE POSITIONED' element still has it's space reserved.
If you use absolute positioning, your elements will not have any space reserved, so your element will actually overlap, without breaking your document:
<div style="background-color:#f00;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
<div style="background-color:#0f0;width:200px;height:100px;position:absolute;top:50px;left:50px;">
ABSOLUTE POSITIONED
</div>
<div style="background-color:#00f;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
Finally, you can control which elements are on top of the others by using z-index:
<div style="z-index:10;background-color:#f00;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
<div style="z-index:5;background-color:#0f0;width:200px;height:100px;position:absolute;top:50px;left:50px;">
ABSOLUTE POSITIONED
</div>
<div style="z-index:0;background-color:#00f;width:200px;height:100px;">
DEFAULT POSITIONED
</div>
jQuery .slideRight effect
If you're willing to include the jQuery UI library, in addition to jQuery itself, then you can simply use hide(), with additional arguments, as follows:
$(document).ready(
function(){
$('#slider').click(
function(){
$(this).hide('slide',{direction:'right'},1000);
});
});
Without using jQuery UI, you could achieve your aim just using animate():
$(document).ready(
function(){
$('#slider').click(
function(){
$(this)
.animate(
{
'margin-left':'1000px'
// to move it towards the right and, probably, off-screen.
},1000,
function(){
$(this).slideUp('fast');
// once it's finished moving to the right, just
// removes the the element from the display, you could use
// `remove()` instead, or whatever.
}
);
});
});
If you do choose to use jQuery UI, then I'd recommend linking to the Google-hosted code, at: https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.6/jquery-ui.min.js
What exactly is OAuth (Open Authorization)?
OAuth is a protocol that is used from Resource Owner(facebook, google, tweeter, microsoft live and so on) to provide a needed information, or to provide a permission for write success to third party system(your site for example). Most likely without OAuth protocol the credentials should be available for the third part systems which will be inappropriate way of communication between those systems.
Create File If File Does Not Exist
Yes, you need to negate File.Exists(path) if you want to check if the file doesn't exist.
How to use css style in php
I don't know this is correct format or not. but it can solved my problem with removing type="text/css" when insert css code in html/tpl file with php.
<style type="text/css"></style>become
<style></style>Example
Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
In my maven project this error occurs, after i closed my projects and reopens them. The dependencys wasn´t build correctly at that time. So for me the solution was just to update the Maven Dependencies of the projects!
How to resolve "The requested URL was rejected. Please consult with your administrator." error?
It is not related with Firewall. I had the same issue accessing from office and from mobile. I cleaned the cookies and worked fine. You can read more at https://support.google.com/chromebook/answer/1085581?hl=en
Should Jquery code go in header or footer?
The problem caused by scripts is that they block parallel downloads. The HTTP/1.1 specification suggests that browsers download no more than two components in parallel per hostname. If you serve your images from multiple hostnames, you can get more than two downloads to occur in parallel. While a script is downloading, however, the browser won't start any other downloads, even on different hostnames. In some situations it's not easy to move scripts to the bottom. If, for example, the script uses document.write to insert part of the page's content, it can't be moved lower in the page. There might also be scoping issues. In many cases, there are ways to workaround these situations.
An alternative suggestion that often comes up is to use deferred scripts. The DEFER attribute indicates that the script does not contain document.write, and is a clue to browsers that they can continue rendering. Unfortunately, Firefox doesn't support the DEFER attribute. In Internet Explorer, the script may be deferred, but not as much as desired. If a script can be deferred, it can also be moved to the bottom of the page. That will make your web pages load faster.
EDIT: Firefox does support the DEFER attribute since version 3.6.
Sources:
How do I convert dmesg timestamp to custom date format?
With the help of dr answer, I wrote a workaround that makes the conversion to put in your .bashrc. It won't break anything if you don't have any timestamp or already correct timestamps.
dmesg_with_human_timestamps () {
$(type -P dmesg) "$@" | perl -w -e 'use strict;
my ($uptime) = do { local @ARGV="/proc/uptime";<>}; ($uptime) = ($uptime =~ /^(\d+)\./);
foreach my $line (<>) {
printf( ($line=~/^\[\s*(\d+)\.\d+\](.+)/) ? ( "[%s]%s\n", scalar localtime(time - $uptime + $1), $2 ) : $line )
}'
}
alias dmesg=dmesg_with_human_timestamps
Also, a good reading on the dmesg timestamp conversion logic & how to enable timestamps when there are none: https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92677
Openssl : error "self signed certificate in certificate chain"
You have a certificate which is self-signed, so it's non-trusted by default, that's why OpenSSL complains. This warning is actually a good thing, because this scenario might also rise due to a man-in-the-middle attack.
To solve this, you'll need to install it as a trusted server. If it's signed by a non-trusted CA, you'll have to install that CA's certificate as well.
Have a look at this link about installing self-signed certificates.
CASE (Contains) rather than equal statement
Pseudo code, something like:
CASE
When CHARINDEX('lactulose', dbo.Table.Column) > 0 Then 'BP Medication'
ELSE ''
END AS 'Medication Type'
This does not care where the keyword is found in the list and avoids depending on formatting of spaces and commas.
Open Windows Explorer and select a file
Check out this snippet:
Private Sub openDialog()
Dim fd As Office.FileDialog
Set fd = Application.FileDialog(msoFileDialogFilePicker)
With fd
.AllowMultiSelect = False
' Set the title of the dialog box.
.Title = "Please select the file."
' Clear out the current filters, and add our own.
.Filters.Clear
.Filters.Add "Excel 2003", "*.xls"
.Filters.Add "All Files", "*.*"
' Show the dialog box. If the .Show method returns True, the
' user picked at least one file. If the .Show method returns
' False, the user clicked Cancel.
If .Show = True Then
txtFileName = .SelectedItems(1) 'replace txtFileName with your textbox
End If
End With
End Sub
I think this is what you are asking for.
Targeting only Firefox with CSS
CSS support has binding to javascript, as a side note.
if (CSS.supports("( -moz-user-select:unset )")) {_x000D_
console.log("FIREFOX!!!")_x000D_
}https://developer.mozilla.org/en-US/docs/Web/CSS/Mozilla_Extensions
How to connect SQLite with Java?
If you are using Netbeans using Maven to add library is easier. I have tried using above solutions but it didn't work.
<dependencies>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.7.2</version>
</dependency>
</dependencies>
I have added Maven dependency and java.lang.ClassNotFoundException: org.sqlite.JDBC error gone.
java.sql.SQLException: No suitable driver found for jdbc:microsoft:sqlserver
I was having the same error, but had a proper connection string. My problem was that the driver was not being used, therefore was optimized out of the compiled war.
Be sure to import the driver:
import com.microsoft.sqlserver.jdbc.SQLServerDriver;
And then to force it to be included in the final war, you can do something like this:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
That line is in the original question. This will also work:
SQLServerDriver driver = new SQLServerDriver();
How do you Programmatically Download a Webpage in Java
Well, you could go with the built-in libraries such as URL and URLConnection, but they don't give very much control.
Personally I'd go with the Apache HTTPClient library.
Edit: HTTPClient has been set to end of life by Apache. The replacement is: HTTP Components
java.net.BindException: Address already in use: JVM_Bind <null>:80
The error:
java.net.BindException: Address already in use: JVM_Bind :80
means that another application is listening on port 80.
You can check which process is using this port by lsof command, e.g. sudo lsof -i:80. Then stop or kill it.
If won't help finding application running on the same port, the common mistake is the Tomcat misconfiguration.
For example by default Tomcat listens on port 8005 for SHUTDOWN command and if you set another Connector to listen on the same port, you'll get port conflict.
So please double check in server.xml whether these ports are different:
<Server port="8005" shutdown="SHUTDOWN">
<Connector port="8983" protocol="HTTP/1.1"
How to read file using NPOI
I find NPOI very usefull for working with Excel Files, here is my implementation (Comments are in Spanish, sorry for that):
This Method Opens an Excel (both xls or xlsx) file and converts it into a DataTable.
/// <summary>Abre un archivo de Excel (xls o xlsx) y lo convierte en un DataTable.
/// LA PRIMERA FILA DEBE CONTENER LOS NOMBRES DE LOS CAMPOS.</summary>
/// <param name="pRutaArchivo">Ruta completa del archivo a abrir.</param>
/// <param name="pHojaIndex">Número (basado en cero) de la hoja que se desea abrir. 0 es la primera hoja.</param>
private DataTable Excel_To_DataTable(string pRutaArchivo, int pHojaIndex)
{
// --------------------------------- //
/* REFERENCIAS:
* NPOI.dll
* NPOI.OOXML.dll
* NPOI.OpenXml4Net.dll */
// --------------------------------- //
/* USING:
* using NPOI.SS.UserModel;
* using NPOI.HSSF.UserModel;
* using NPOI.XSSF.UserModel; */
// AUTOR: Ing. Jhollman Chacon R. 2015
// --------------------------------- //
DataTable Tabla = null;
try
{
if (System.IO.File.Exists(pRutaArchivo))
{
IWorkbook workbook = null; //IWorkbook determina si es xls o xlsx
ISheet worksheet = null;
string first_sheet_name = "";
using (FileStream FS = new FileStream(pRutaArchivo, FileMode.Open, FileAccess.Read))
{
workbook = WorkbookFactory.Create(FS); //Abre tanto XLS como XLSX
worksheet = workbook.GetSheetAt(pHojaIndex); //Obtener Hoja por indice
first_sheet_name = worksheet.SheetName; //Obtener el nombre de la Hoja
Tabla = new DataTable(first_sheet_name);
Tabla.Rows.Clear();
Tabla.Columns.Clear();
// Leer Fila por fila desde la primera
for (int rowIndex = 0; rowIndex <= worksheet.LastRowNum; rowIndex++)
{
DataRow NewReg = null;
IRow row = worksheet.GetRow(rowIndex);
IRow row2 = null;
IRow row3 = null;
if (rowIndex == 0)
{
row2 = worksheet.GetRow(rowIndex + 1); //Si es la Primera fila, obtengo tambien la segunda para saber el tipo de datos
row3 = worksheet.GetRow(rowIndex + 2); //Y la tercera tambien por las dudas
}
if (row != null) //null is when the row only contains empty cells
{
if (rowIndex > 0) NewReg = Tabla.NewRow();
int colIndex = 0;
//Leer cada Columna de la fila
foreach (ICell cell in row.Cells)
{
object valorCell = null;
string cellType = "";
string[] cellType2 = new string[2];
if (rowIndex == 0) //Asumo que la primera fila contiene los titlos:
{
for (int i = 0; i < 2; i++)
{
ICell cell2 = null;
if (i == 0) { cell2 = row2.GetCell(cell.ColumnIndex); }
else { cell2 = row3.GetCell(cell.ColumnIndex); }
if (cell2 != null)
{
switch (cell2.CellType)
{
case CellType.Blank: break;
case CellType.Boolean: cellType2[i] = "System.Boolean"; break;
case CellType.String: cellType2[i] = "System.String"; break;
case CellType.Numeric:
if (HSSFDateUtil.IsCellDateFormatted(cell2)) { cellType2[i] = "System.DateTime"; }
else
{
cellType2[i] = "System.Double"; //valorCell = cell2.NumericCellValue;
}
break;
case CellType.Formula:
bool continuar = true;
switch (cell2.CachedFormulaResultType)
{
case CellType.Boolean: cellType2[i] = "System.Boolean"; break;
case CellType.String: cellType2[i] = "System.String"; break;
case CellType.Numeric:
if (HSSFDateUtil.IsCellDateFormatted(cell2)) { cellType2[i] = "System.DateTime"; }
else
{
try
{
//DETERMINAR SI ES BOOLEANO
if (cell2.CellFormula == "TRUE()") { cellType2[i] = "System.Boolean"; continuar = false; }
if (continuar && cell2.CellFormula == "FALSE()") { cellType2[i] = "System.Boolean"; continuar = false; }
if (continuar) { cellType2[i] = "System.Double"; continuar = false; }
}
catch { }
} break;
}
break;
default:
cellType2[i] = "System.String"; break;
}
}
}
//Resolver las diferencias de Tipos
if (cellType2[0] == cellType2[1]) { cellType = cellType2[0]; }
else
{
if (cellType2[0] == null) cellType = cellType2[1];
if (cellType2[1] == null) cellType = cellType2[0];
if (cellType == "") cellType = "System.String";
}
//Obtener el nombre de la Columna
string colName = "Column_{0}";
try { colName = cell.StringCellValue; }
catch { colName = string.Format(colName, colIndex); }
//Verificar que NO se repita el Nombre de la Columna
foreach (DataColumn col in Tabla.Columns)
{
if (col.ColumnName == colName) colName = string.Format("{0}_{1}", colName, colIndex);
}
//Agregar el campos de la tabla:
DataColumn codigo = new DataColumn(colName, System.Type.GetType(cellType));
Tabla.Columns.Add(codigo); colIndex++;
}
else
{
//Las demas filas son registros:
switch (cell.CellType)
{
case CellType.Blank: valorCell = DBNull.Value; break;
case CellType.Boolean: valorCell = cell.BooleanCellValue; break;
case CellType.String: valorCell = cell.StringCellValue; break;
case CellType.Numeric:
if (HSSFDateUtil.IsCellDateFormatted(cell)) { valorCell = cell.DateCellValue; }
else { valorCell = cell.NumericCellValue; } break;
case CellType.Formula:
switch (cell.CachedFormulaResultType)
{
case CellType.Blank: valorCell = DBNull.Value; break;
case CellType.String: valorCell = cell.StringCellValue; break;
case CellType.Boolean: valorCell = cell.BooleanCellValue; break;
case CellType.Numeric:
if (HSSFDateUtil.IsCellDateFormatted(cell)) { valorCell = cell.DateCellValue; }
else { valorCell = cell.NumericCellValue; }
break;
}
break;
default: valorCell = cell.StringCellValue; break;
}
//Agregar el nuevo Registro
if (cell.ColumnIndex <= Tabla.Columns.Count - 1) NewReg[cell.ColumnIndex] = valorCell;
}
}
}
if (rowIndex > 0) Tabla.Rows.Add(NewReg);
}
Tabla.AcceptChanges();
}
}
else
{
throw new Exception("ERROR 404: El archivo especificado NO existe.");
}
}
catch (Exception ex)
{
throw ex;
}
return Tabla;
}
This Second method does the oposite, saves a DataTable into an Excel File, yeah it can either be xls or the new xlsx, your choise!
/// <summary>Convierte un DataTable en un archivo de Excel (xls o Xlsx) y lo guarda en disco.</summary>
/// <param name="pDatos">Datos de la Tabla a guardar. Usa el nombre de la tabla como nombre de la Hoja</param>
/// <param name="pFilePath">Ruta del archivo donde se guarda.</param>
private void DataTable_To_Excel(DataTable pDatos, string pFilePath)
{
try
{
if (pDatos != null && pDatos.Rows.Count > 0)
{
IWorkbook workbook = null;
ISheet worksheet = null;
using (FileStream stream = new FileStream(pFilePath, FileMode.Create, FileAccess.ReadWrite))
{
string Ext = System.IO.Path.GetExtension(pFilePath); //<-Extension del archivo
switch (Ext.ToLower())
{
case ".xls":
HSSFWorkbook workbookH = new HSSFWorkbook();
NPOI.HPSF.DocumentSummaryInformation dsi = NPOI.HPSF.PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "Cutcsa"; dsi.Manager = "Departamento Informatico";
workbookH.DocumentSummaryInformation = dsi;
workbook = workbookH;
break;
case ".xlsx": workbook = new XSSFWorkbook(); break;
}
worksheet = workbook.CreateSheet(pDatos.TableName); //<-Usa el nombre de la tabla como nombre de la Hoja
//CREAR EN LA PRIMERA FILA LOS TITULOS DE LAS COLUMNAS
int iRow = 0;
if (pDatos.Columns.Count > 0)
{
int iCol = 0;
IRow fila = worksheet.CreateRow(iRow);
foreach (DataColumn columna in pDatos.Columns)
{
ICell cell = fila.CreateCell(iCol, CellType.String);
cell.SetCellValue(columna.ColumnName);
iCol++;
}
iRow++;
}
//FORMATOS PARA CIERTOS TIPOS DE DATOS
ICellStyle _doubleCellStyle = workbook.CreateCellStyle();
_doubleCellStyle.DataFormat = workbook.CreateDataFormat().GetFormat("#,##0.###");
ICellStyle _intCellStyle = workbook.CreateCellStyle();
_intCellStyle.DataFormat = workbook.CreateDataFormat().GetFormat("#,##0");
ICellStyle _boolCellStyle = workbook.CreateCellStyle();
_boolCellStyle.DataFormat = workbook.CreateDataFormat().GetFormat("BOOLEAN");
ICellStyle _dateCellStyle = workbook.CreateCellStyle();
_dateCellStyle.DataFormat = workbook.CreateDataFormat().GetFormat("dd-MM-yyyy");
ICellStyle _dateTimeCellStyle = workbook.CreateCellStyle();
_dateTimeCellStyle.DataFormat = workbook.CreateDataFormat().GetFormat("dd-MM-yyyy HH:mm:ss");
//AHORA CREAR UNA FILA POR CADA REGISTRO DE LA TABLA
foreach (DataRow row in pDatos.Rows)
{
IRow fila = worksheet.CreateRow(iRow);
int iCol = 0;
foreach (DataColumn column in pDatos.Columns)
{
ICell cell = null; //<-Representa la celda actual
object cellValue = row[iCol]; //<- El valor actual de la celda
switch (column.DataType.ToString())
{
case "System.Boolean":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Boolean);
if (Convert.ToBoolean(cellValue)) { cell.SetCellFormula("TRUE()"); }
else { cell.SetCellFormula("FALSE()"); }
cell.CellStyle = _boolCellStyle;
}
break;
case "System.String":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.String);
cell.SetCellValue(Convert.ToString(cellValue));
}
break;
case "System.Int32":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Numeric);
cell.SetCellValue(Convert.ToInt32(cellValue));
cell.CellStyle = _intCellStyle;
}
break;
case "System.Int64":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Numeric);
cell.SetCellValue(Convert.ToInt64(cellValue));
cell.CellStyle = _intCellStyle;
}
break;
case "System.Decimal":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Numeric);
cell.SetCellValue(Convert.ToDouble(cellValue));
cell.CellStyle = _doubleCellStyle;
}
break;
case "System.Double":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Numeric);
cell.SetCellValue(Convert.ToDouble(cellValue));
cell.CellStyle = _doubleCellStyle;
}
break;
case "System.DateTime":
if (cellValue != DBNull.Value)
{
cell = fila.CreateCell(iCol, CellType.Numeric);
cell.SetCellValue(Convert.ToDateTime(cellValue));
//Si No tiene valor de Hora, usar formato dd-MM-yyyy
DateTime cDate = Convert.ToDateTime(cellValue);
if (cDate != null && cDate.Hour > 0) { cell.CellStyle = _dateTimeCellStyle; }
else { cell.CellStyle = _dateCellStyle; }
}
break;
default:
break;
}
iCol++;
}
iRow++;
}
workbook.Write(stream);
stream.Close();
}
}
}
catch (Exception ex)
{
throw ex;
}
}
With this 2 methods you can Open an Excel file, load it into a DataTable, do your modifications and save it back into an Excel file.
Hope you guys find this usefull.
Why is super.super.method(); not allowed in Java?
public class SubSubClass extends SubClass {
@Override
public void print() {
super.superPrint();
}
public static void main(String[] args) {
new SubSubClass().print();
}
}
class SuperClass {
public void print() {
System.out.println("Printed in the GrandDad");
}
}
class SubClass extends SuperClass {
public void superPrint() {
super.print();
}
}
Output: Printed in the GrandDad
How to combine 2 plots (ggplot) into one plot?
Dummy data (you should supply this for us)
visual1 = data.frame(ISSUE_DATE=runif(100,2006,2008),COUNTED=runif(100,0,50))
visual2 = data.frame(ISSUE_DATE=runif(100,2006,2008),COUNTED=runif(100,0,50))
combine:
visuals = rbind(visual1,visual2)
visuals$vis=c(rep("visual1",100),rep("visual2",100)) # 100 points of each flavour
Now do:
ggplot(visuals, aes(ISSUE_DATE,COUNTED,group=vis,col=vis)) +
geom_point() + geom_smooth()
and adjust colours etc to taste.
How to do a newline in output
Use "\n" instead of '\n'
Display a jpg image on a JPanel
ImageIcon image = new ImageIcon("image/pic1.jpg");
JLabel label = new JLabel("", image, JLabel.CENTER);
JPanel panel = new JPanel(new BorderLayout());
panel.add( label, BorderLayout.CENTER );
Android Open External Storage directory(sdcard) for storing file
I had been having the exact same problem!
To get the internal SD card you can use
String extStore = System.getenv("EXTERNAL_STORAGE");
File f_exts = new File(extStore);
To get the external SD card you can use
String secStore = System.getenv("SECONDARY_STORAGE");
File f_secs = new File(secStore);
On running the code
extStore = "/storage/emulated/legacy"
secStore = "/storage/extSdCarcd"
works perfectly!
Extracting the top 5 maximum values in excel
=VLOOKUP(LARGE(A1:A10,ROW()),A1:B10,2,0)
Type this formula in first row of your sheet then drag down till fifth row...
its a simple vlookup, which finds the large value in array (A1:A10), the ROW() function gives the row number (first row = 1, second row =2 and so on) and further is the lookup criteria.
Note: You can replace the ROW() to 1,2,3,4,5 as requried...if you have this formula in other than the 1st row, then make sure you subtract some numbers from the row() to get accurate results.
EDIT: TO check tie results
This is possible, you need to add a helper column to the sheet, here is the link. Do let me know in case things seems to be messy....
What's the difference between an Angular component and module
Simplest Explanation:
Module is like a big container containing one or many small containers called Component, Service, Pipe
A Component contains :
HTML template or HTML code
Code(TypeScript)
Service: It is a reusable code that is shared by the Components so that rewriting of code is not required
Pipe: It takes in data as input and transforms it to the desired output
Reference: https://scrimba.com/
Return value from a VBScript function
To return a value from a VBScript function, assign the value to the name of the function, like this:
Function getNumber
getNumber = "423"
End Function
How can I switch themes in Visual Studio 2012
Slightly off topic, but for those of you that want to modify the built-in colors of the Dark/Light themes you can use this little tool I wrote for Visual Studio 2012.
More info here:
How to center a window on the screen in Tkinter?
Use:
import tkinter as tk
if __name__ == '__main__':
root = tk.Tk()
root.title('Centered!')
w = 800
h = 650
ws = root.winfo_screenwidth()
hs = root.winfo_screenheight()
x = (ws/2) - (w/2)
y = (hs/2) - (h/2)
root.geometry('%dx%d+%d+%d' % (w, h, x, y))
root.mainloop()
How to split a string with any whitespace chars as delimiters
Study this code.. good luck
import java.util.*;
class Demo{
public static void main(String args[]){
Scanner input = new Scanner(System.in);
System.out.print("Input String : ");
String s1 = input.nextLine();
String[] tokens = s1.split("[\\s\\xA0]+");
System.out.println(tokens.length);
for(String s : tokens){
System.out.println(s);
}
}
}
how to redirect to external url from c# controller
Use the Controller's Redirect() method.
public ActionResult YourAction()
{
// ...
return Redirect("http://www.example.com");
}
Update
You can't directly perform a server side redirect from an ajax response. You could, however, return a JsonResult with the new url and perform the redirect with javascript.
public ActionResult YourAction()
{
// ...
return Json(new {url = "http://www.example.com"});
}
$.post("@Url.Action("YourAction")", function(data) {
window.location = data.url;
});
Fastest way to compute entropy in Python
The above answer is good, but if you need a version that can operate along different axes, here's a working implementation.
def entropy(A, axis=None):
"""Computes the Shannon entropy of the elements of A. Assumes A is
an array-like of nonnegative ints whose max value is approximately
the number of unique values present.
>>> a = [0, 1]
>>> entropy(a)
1.0
>>> A = np.c_[a, a]
>>> entropy(A)
1.0
>>> A # doctest: +NORMALIZE_WHITESPACE
array([[0, 0], [1, 1]])
>>> entropy(A, axis=0) # doctest: +NORMALIZE_WHITESPACE
array([ 1., 1.])
>>> entropy(A, axis=1) # doctest: +NORMALIZE_WHITESPACE
array([[ 0.], [ 0.]])
>>> entropy([0, 0, 0])
0.0
>>> entropy([])
0.0
>>> entropy([5])
0.0
"""
if A is None or len(A) < 2:
return 0.
A = np.asarray(A)
if axis is None:
A = A.flatten()
counts = np.bincount(A) # needs small, non-negative ints
counts = counts[counts > 0]
if len(counts) == 1:
return 0. # avoid returning -0.0 to prevent weird doctests
probs = counts / float(A.size)
return -np.sum(probs * np.log2(probs))
elif axis == 0:
entropies = map(lambda col: entropy(col), A.T)
return np.array(entropies)
elif axis == 1:
entropies = map(lambda row: entropy(row), A)
return np.array(entropies).reshape((-1, 1))
else:
raise ValueError("unsupported axis: {}".format(axis))
Error message Strict standards: Non-static method should not be called statically in php
Your methods are missing the static keyword. Change
function getInstanceByName($name=''){
to
public static function getInstanceByName($name=''){
if you want to call them statically.
Note that static methods (and Singletons) are death to testability.
Also note that you are doing way too much work in the constructor, especially all that querying shouldn't be in there. All your constructor is supposed to do is set the object into a valid state. If you have to have data from outside the class to do that consider injecting it instead of pulling it. Also note that constructors cannot return anything. They will always return void so all these return false statements do nothing but end the construction.
Pycharm does not show plot
For beginners, you might also want to make sure you are running your script in the console, and not as regular Python code. It is fairly easy to highlight a piece of code and run it.
How do I sum values in a column that match a given condition using pandas?
The essential idea here is to select the data you want to sum, and then sum them. This selection of data can be done in several different ways, a few of which are shown below.
Boolean indexing
Arguably the most common way to select the values is to use Boolean indexing.
With this method, you find out where column 'a' is equal to 1 and then sum the corresponding rows of column 'b'. You can use loc to handle the indexing of rows and columns:
>>> df.loc[df['a'] == 1, 'b'].sum()
15
The Boolean indexing can be extended to other columns. For example if df also contained a column 'c' and we wanted to sum the rows in 'b' where 'a' was 1 and 'c' was 2, we'd write:
df.loc[(df['a'] == 1) & (df['c'] == 2), 'b'].sum()
Query
Another way to select the data is to use query to filter the rows you're interested in, select column 'b' and then sum:
>>> df.query("a == 1")['b'].sum()
15
Again, the method can be extended to make more complicated selections of the data:
df.query("a == 1 and c == 2")['b'].sum()
Note this is a little more concise than the Boolean indexing approach.
Groupby
The alternative approach is to use groupby to split the DataFrame into parts according to the value in column 'a'. You can then sum each part and pull out the value that the 1s added up to:
>>> df.groupby('a')['b'].sum()[1]
15
This approach is likely to be slower than using Boolean indexing, but it is useful if you want check the sums for other values in column a:
>>> df.groupby('a')['b'].sum()
a
1 15
2 8
Pass props to parent component in React.js
It appears there's a simple answer. Consider this:
var Child = React.createClass({
render: function() {
<a onClick={this.props.onClick.bind(null, this)}>Click me</a>
}
});
var Parent = React.createClass({
onClick: function(component, event) {
component.props // #=> {Object...}
},
render: function() {
<Child onClick={this.onClick} />
}
});
The key is calling bind(null, this) on the this.props.onClick event, passed from the parent. Now, the onClick function accepts arguments component, AND event. I think that's the best of all worlds.
UPDATE: 9/1/2015
This was a bad idea: letting child implementation details leak in to the parent was never a good path. See Sebastien Lorber's answer.
Java regex capturing groups indexes
For The Rest Of Us
Here is a simple and clear example of how this works
Regex: ([a-zA-Z0-9]+)([\s]+)([a-zA-Z ]+)([\s]+)([0-9]+)
String: "!* UserName10 John Smith 01123 *!"
group(0): UserName10 John Smith 01123
group(1): UserName10
group(2):
group(3): John Smith
group(4):
group(5): 01123
As you can see, I have created FIVE groups which are each enclosed in parentheses.
I included the !* and *! on either side to make it clearer. Note that none of those characters are in the RegEx and therefore will not be produced in the results. Group(0) merely gives you the entire matched string (all of my search criteria in one single line). Group 1 stops right before the first space because the space character was not included in the search criteria. Groups 2 and 4 are simply the white space, which in this case is literally a space character, but could also be a tab or a line feed etc. Group 3 includes the space because I put it in the search criteria ... etc.
Hope this makes sense.
What is VanillaJS?
There's no difference at all, VanillaJS is just a way to refer to native (non-extended and standards-based) JavaScript. Generally speaking it's a term of contrast when using libraries and frameworks like jQuery and React. Website www.vanilla-js.com lays emphasis on it as a joke, by talking 'bout VanillaJS as though it were a fast, lightweight, and cross-platform framework. That muddies the waters! Thus, it can be a little philosophical question: "how many things do I compile to Vanilla JavaScript without being VanillaJS themselves?" So, a mere guideline for that is: if you can write the code and run it in any current web-browser without additional tools or so called compile steps, it might be VanillaJS.
file path Windows format to java format
Java 7 and up supports the Path class (in java.nio package).
You can use this class to convert a string-path to one that works for your current OS.
Using:
Paths.get("\\folder\\subfolder").toString()
on a Unix machine, will give you /folder/subfolder. Also works the other way around.
https://docs.oracle.com/javase/tutorial/essential/io/pathOps.html
What is the hamburger menu icon called and the three vertical dots icon called?
According to Reddit, more options icon and kabob menu are popular names. I prefer the latter as it goes well with hamburger menu.
Retrieving parameters from a URL
import cgitb
cgitb.enable()
import cgi
print "Content-Type: text/plain;charset=utf-8"
print
form = cgi.FieldStorage()
i = int(form.getvalue('a'))+int(form.getvalue('b'))
print i
How do I get the current GPS location programmatically in Android?
Here is additional information for other answers.
Since Android has
GPS_PROVIDER and NETWORK_PROVIDER
you can register to both and start fetch events from onLocationChanged(Location location) from two at the same time. So far so good. Now the question do we need two results or we should take the best. As I know GPS_PROVIDER results have better accuracy than NETWORK_PROVIDER.
Let's define Location field:
private Location currentBestLocation = null;
Before we start listen on Location change we will implement the following method. This method returns the last known location, between the GPS and the network one. For this method newer is best.
/**
* @return the last know best location
*/
private Location getLastBestLocation() {
Location locationGPS = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Location locationNet = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
long GPSLocationTime = 0;
if (null != locationGPS) { GPSLocationTime = locationGPS.getTime(); }
long NetLocationTime = 0;
if (null != locationNet) {
NetLocationTime = locationNet.getTime();
}
if ( 0 < GPSLocationTime - NetLocationTime ) {
return locationGPS;
}
else {
return locationNet;
}
}
Each time when we retrieve a new location we will compare it with our previous result.
...
static final int TWO_MINUTES = 1000 * 60 * 2;
...
I add a new method to onLocationChanged:
@Override
public void onLocationChanged(Location location) {
makeUseOfNewLocation(location);
if(currentBestLocation == null){
currentBestLocation = location;
}
....
}
/**
* This method modify the last know good location according to the arguments.
*
* @param location The possible new location.
*/
void makeUseOfNewLocation(Location location) {
if ( isBetterLocation(location, currentBestLocation) ) {
currentBestLocation = location;
}
}
....
/** Determines whether one location reading is better than the current location fix
* @param location The new location that you want to evaluate
* @param currentBestLocation The current location fix, to which you want to compare the new one.
*/
protected boolean isBetterLocation(Location location, Location currentBestLocation) {
if (currentBestLocation == null) {
// A new location is always better than no location
return true;
}
// Check whether the new location fix is newer or older
long timeDelta = location.getTime() - currentBestLocation.getTime();
boolean isSignificantlyNewer = timeDelta > TWO_MINUTES;
boolean isSignificantlyOlder = timeDelta < -TWO_MINUTES;
boolean isNewer = timeDelta > 0;
// If it's been more than two minutes since the current location, use the new location,
// because the user has likely moved.
if (isSignificantlyNewer) {
return true;
// If the new location is more than two minutes older, it must be worse.
} else if (isSignificantlyOlder) {
return false;
}
// Check whether the new location fix is more or less accurate
int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy());
boolean isLessAccurate = accuracyDelta > 0;
boolean isMoreAccurate = accuracyDelta < 0;
boolean isSignificantlyLessAccurate = accuracyDelta > 200;
// Check if the old and new location are from the same provider
boolean isFromSameProvider = isSameProvider(location.getProvider(),
currentBestLocation.getProvider());
// Determine location quality using a combination of timeliness and accuracy
if (isMoreAccurate) {
return true;
} else if (isNewer && !isLessAccurate) {
return true;
} else if (isNewer && !isSignificantlyLessAccurate && isFromSameProvider) {
return true;
}
return false;
}
// Checks whether two providers are the same
private boolean isSameProvider(String provider1, String provider2) {
if (provider1 == null) {
return provider2 == null;
}
return provider1.equals(provider2);
}
....
Finding element in XDocument?
The Elements() method returns an IEnumerable<XElement> containing all child elements of the current node. For an XDocument, that collection only contains the Root element. Therefore the following is required:
var query = from c in xmlFile.Root.Elements("Band")
select c;
Selenium -- How to wait until page is completely loaded
It seems that you need to wait for the page to be reloaded before clicking on the "Add" button. In this case you could wait for the "Add Item" element to become stale before clicking on the reloaded element:
WebDriverWait wait = new WebDriverWait(driver, 20);
By addItem = By.xpath("//input[.='Add Item']");
// get the "Add Item" element
WebElement element = wait.until(ExpectedConditions.presenceOfElementLocated(addItem));
//trigger the reaload of the page
driver.findElement(By.id("...")).click();
// wait the element "Add Item" to become stale
wait.until(ExpectedConditions.stalenessOf(element));
// click on "Add Item" once the page is reloaded
wait.until(ExpectedConditions.presenceOfElementLocated(addItem)).click();
How can I match multiple occurrences with a regex in JavaScript similar to PHP's preg_match_all()?
Use window.URL:
> s = 'http://www.example.com/index.html?1111342=Adam%20Franco&348572=Bob%20Jones'
> u = new URL(s)
> Array.from(u.searchParams.entries())
[["1111342", "Adam Franco"], ["348572", "Bob Jones"]]
HTML-Tooltip position relative to mouse pointer
For default tooltip behavior simply add the title attribute. This can't contain images though.
<div title="regular tooltip">Hover me</div>
Before you clarified the question I did this up in pure JavaScript, hope you find it useful. The image will pop up and follow the mouse.
JavaScript
var tooltipSpan = document.getElementById('tooltip-span');
window.onmousemove = function (e) {
var x = e.clientX,
y = e.clientY;
tooltipSpan.style.top = (y + 20) + 'px';
tooltipSpan.style.left = (x + 20) + 'px';
};
CSS
.tooltip span {
display:none;
}
.tooltip:hover span {
display:block;
position:fixed;
overflow:hidden;
}
Extending for multiple elements
One solution for multiple elements is to update all tooltip span's and setting them under the cursor on mouse move.
var tooltips = document.querySelectorAll('.tooltip span');
window.onmousemove = function (e) {
var x = (e.clientX + 20) + 'px',
y = (e.clientY + 20) + 'px';
for (var i = 0; i < tooltips.length; i++) {
tooltips[i].style.top = y;
tooltips[i].style.left = x;
}
};
How to check whether Kafka Server is running?
I found an event OnError in confluent Kafka:
consumer.OnError += Consumer_OnError;
private void Consumer_OnError(object sender, Error e)
{
Debug.Log("connection error: "+ e.Reason);
ConsumerConnectionError(e);
}
And its documentation in code:
//
// Summary:
// Raised on critical errors, e.g. connection failures or all brokers down. Note
// that the client will try to automatically recover from errors - these errors
// should be seen as informational rather than catastrophic
//
// Remarks:
// Executes on the same thread as every other Consumer event handler (except OnLog
// which may be called from an arbitrary thread).
public event EventHandler<Error> OnError;
Reset textbox value in javascript
With jQuery, I've found that sometimes using val to clear the value of a textbox has no effect, in those situations I've found that using attr does the job
$('#searchField').attr("value", "");
How to display an unordered list in two columns?
You can do this really easily with the jQuery-Columns Plugin for example to split a ul with a class of .mylist you would do
$('.mylist').cols(2);
Here's a live example on jsfiddle
I like this better than with CSS because with the CSS solution not everything aligns vertically to the top.
class << self idiom in Ruby
What class << thing does:
class Hi
self #=> Hi
class << self #same as 'class << Hi'
self #=> #<Class:Hi>
self == Hi.singleton_class #=> true
end
end
[it makes self == thing.singleton_class in the context of its block].
What is thing.singleton_class?
hi = String.new
def hi.a
end
hi.class.instance_methods.include? :a #=> false
hi.singleton_class.instance_methods.include? :a #=> true
hi object inherits its #methods from its #singleton_class.instance_methods and then from its #class.instance_methods.
Here we gave hi's singleton class instance method :a. It could have been done with class << hi instead.
hi's #singleton_class has all instance methods hi's #class has, and possibly some more (:a here).
[instance methods of thing's #class and #singleton_class can be applied directly to thing. when ruby sees thing.a, it first looks for :a method definition in thing.singleton_class.instance_methods and then in thing.class.instance_methods]
By the way - they call object's singleton class == metaclass == eigenclass.
ffmpeg usage to encode a video to H264 codec format
I believe that by now the above answers are outdated (or at least unclear) so here's my little go at it.
I tried compiling ffmpeg with the option --enable-encoders=libx264 and it will give no error but it won't enable anything (I can't seem to find where I found that suggestion).
Anyways step-by-step, first you must compile libx264 yourself because repository version is outdated:
wget ftp://ftp.videolan.org/pub/x264/snapshots/last_x264.tar.bz2
tar --bzip2 -xvf last_x264.tar.bz2
cd x264-snapshot-XXXXXXXX-XXXX/
./configure
make
sudo make install
And then get and compile ffmpeg with libx264 enabled. I'm using the latest release which is "Happiness":
wget http://ffmpeg.org/releases/ffmpeg-0.11.2.tar.bz2
tar --bzip2 -xvf ffmpeg-0.11.2.tar.bz2
cd ffmpeg-0.11.2/
./configure --enable-libx264 --enable-gpl
make
sudo install
Now finally you have the libx264 codec to encode, to check it you may run
ffmpeg -codecs | grep h264
and you'll see the options you have were the first D means decoding and the first E means encoding
Set specific precision of a BigDecimal
You can use setScale() e.g.
double d = ...
BigDecimal db = new BigDecimal(d).setScale(12, BigDecimal.ROUND_HALF_UP);
proper hibernate annotation for byte[]
i fixed My issue by adding the annotation of @Lob which will create the byte[] in oracle as blob , but this annotation will create the field as oid which not work properly , To make byte[] created as bytea i made customer Dialect for postgres as below
Public class PostgreSQLDialectCustom extends PostgreSQL82Dialect {
public PostgreSQLDialectCustom() {
System.out.println("Init PostgreSQLDialectCustom");
registerColumnType( Types.BLOB, "bytea" );
}
@Override
public SqlTypeDescriptor remapSqlTypeDescriptor(SqlTypeDescriptor sqlTypeDescriptor) {
if (sqlTypeDescriptor.getSqlType() == java.sql.Types.BLOB) {
return BinaryTypeDescriptor.INSTANCE;
}
return super.remapSqlTypeDescriptor(sqlTypeDescriptor);
}
}
Also need to override parameter for the Dialect
spring.jpa.properties.hibernate.dialect=com.ntg.common.DBCompatibilityHelper.PostgreSQLDialectCustom
more hint can be found her : https://dzone.com/articles/postgres-and-oracle
case statement in where clause - SQL Server
You don't need case in the where statement, just use parentheses and or:
Select * From Times
WHERE StartDate <= @Date AND EndDate >= @Date
AND (
(@day = 'Monday' AND Monday = 1)
OR (@day = 'Tuesday' AND Tuesday = 1)
OR Wednesday = 1
)
Additionally, your syntax is wrong for a case. It doesn't append things to the string--it returns a single value. You'd want something like this, if you were actually going to use a case statement (which you shouldn't):
Select * From Times
WHERE (StartDate <= @Date) AND (EndDate >= @Date)
AND 1 = CASE WHEN @day = 'Monday' THEN Monday
WHEN @day = 'Tuesday' THEN Tuesday
ELSE Wednesday
END
And just for an extra umph, you can use the between operator for your date:
where @Date between StartDate and EndDate
Making your final query:
select
*
from
Times
where
@Date between StartDate and EndDate
and (
(@day = 'Monday' and Monday = 1)
or (@day = 'Tuesday' and Tuesday = 1)
or Wednesday = 1
)
Onclick function based on element id
you can try these:
document.getElementById("RootNode").onclick = function(){/*do something*/};
or
$('#RootNode').click(function(){/*do something*/});
or
$(document).on("click", "#RootNode", function(){/*do something*/});
There is a point for the first two method which is, it matters where in your page DOM, you should put them, the whole DOM should be loaded, to be able to find the, which is usually it gets solved if you wrap them in a window.onload or DOMReady event, like:
//in Vanilla JavaScript
window.addEventListener("load", function(){
document.getElementById("RootNode").onclick = function(){/*do something*/};
});
//for jQuery
$(document).ready(function(){
$('#RootNode').click(function(){/*do something*/});
});
Bootstrap - floating navbar button right
You would need to use the following markup. If you want to float any menu items to the right, create a separate <ul class="nav navbar-nav"> with navbar-right class to it.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<html>_x000D_
_x000D_
<head>_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />_x000D_
</head>_x000D_
_x000D_
<body>_x000D_
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">_x000D_
<div class="container">_x000D_
<div class="navbar-header">_x000D_
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">_x000D_
<span class="sr-only">Toggle navigation</span>_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
</button>_x000D_
<a class="navbar-brand" href="#">Project name</a>_x000D_
</div>_x000D_
<div class="collapse navbar-collapse">_x000D_
<ul class="nav navbar-nav">_x000D_
<li class="active"><a href="#">Home</a></li>_x000D_
<li><a href="#about">About</a></li>_x000D_
_x000D_
</ul>_x000D_
<ul class="nav navbar-nav navbar-right">_x000D_
<li><a href="#contact">Contact</a></li>_x000D_
</ul>_x000D_
</div>_x000D_
</div>_x000D_
</div>_x000D_
</body>_x000D_
_x000D_
</html>Counting Number of Letters in a string variable
You can simply use
int numberOfLetters = yourWord.Length;
or to be cool and trendy, use LINQ like this :
int numberOfLetters = yourWord.ToCharArray().Count();
and if you hate both Properties and LINQ, you can go old school with a loop :
int numberOfLetters = 0;
foreach (char letter in yourWord)
{
numberOfLetters++;
}
Reloading the page gives wrong GET request with AngularJS HTML5 mode
I believe your issue is with regards to the server. The angular documentation with regards to HTML5 mode (at the link in your question) states:
Server side Using this mode requires URL rewriting on server side, basically you have to rewrite all your links to entry point of your application (e.g. index.html)
I believe you'll need to setup a url rewrite from /about to /.
Unlocking tables if thread is lost
Here's what i do to FORCE UNLOCK FOR some locked tables in MySQL
1) Enter MySQL
mysql -u your_user -p
2) Let's see the list of locked tables
mysql> show open tables where in_use>0;
3) Let's see the list of the current processes, one of them is locking your table(s)
mysql> show processlist;
4) Let's kill one of these processes
mysql> kill put_process_id_here;
On delete cascade with doctrine2
Here is simple example. A contact has one to many associated phone numbers. When a contact is deleted, I want all its associated phone numbers to also be deleted, so I use ON DELETE CASCADE. The one-to-many/many-to-one relationship is implemented with by the foreign key in the phone_numbers.
CREATE TABLE contacts
(contact_id BIGINT AUTO_INCREMENT NOT NULL,
name VARCHAR(75) NOT NULL,
PRIMARY KEY(contact_id)) ENGINE = InnoDB;
CREATE TABLE phone_numbers
(phone_id BIGINT AUTO_INCREMENT NOT NULL,
phone_number CHAR(10) NOT NULL,
contact_id BIGINT NOT NULL,
PRIMARY KEY(phone_id),
UNIQUE(phone_number)) ENGINE = InnoDB;
ALTER TABLE phone_numbers ADD FOREIGN KEY (contact_id) REFERENCES \
contacts(contact_id) ) ON DELETE CASCADE;
By adding "ON DELETE CASCADE" to the foreign key constraint, phone_numbers will automatically be deleted when their associated contact is deleted.
INSERT INTO table contacts(name) VALUES('Robert Smith');
INSERT INTO table phone_numbers(phone_number, contact_id) VALUES('8963333333', 1);
INSERT INTO table phone_numbers(phone_number, contact_id) VALUES('8964444444', 1);
Now when a row in the contacts table is deleted, all its associated phone_numbers rows will automatically be deleted.
DELETE TABLE contacts as c WHERE c.id=1; /* delete cascades to phone_numbers */
To achieve the same thing in Doctrine, to get the same DB-level "ON DELETE CASCADE" behavoir, you configure the @JoinColumn with the onDelete="CASCADE" option.
<?php
namespace Entities;
use Doctrine\Common\Collections\ArrayCollection;
/**
* @Entity
* @Table(name="contacts")
*/
class Contact
{
/**
* @Id
* @Column(type="integer", name="contact_id")
* @GeneratedValue
*/
protected $id;
/**
* @Column(type="string", length="75", unique="true")
*/
protected $name;
/**
* @OneToMany(targetEntity="Phonenumber", mappedBy="contact")
*/
protected $phonenumbers;
public function __construct($name=null)
{
$this->phonenumbers = new ArrayCollection();
if (!is_null($name)) {
$this->name = $name;
}
}
public function getId()
{
return $this->id;
}
public function setName($name)
{
$this->name = $name;
}
public function addPhonenumber(Phonenumber $p)
{
if (!$this->phonenumbers->contains($p)) {
$this->phonenumbers[] = $p;
$p->setContact($this);
}
}
public function removePhonenumber(Phonenumber $p)
{
$this->phonenumbers->remove($p);
}
}
<?php
namespace Entities;
/**
* @Entity
* @Table(name="phonenumbers")
*/
class Phonenumber
{
/**
* @Id
* @Column(type="integer", name="phone_id")
* @GeneratedValue
*/
protected $id;
/**
* @Column(type="string", length="10", unique="true")
*/
protected $number;
/**
* @ManyToOne(targetEntity="Contact", inversedBy="phonenumbers")
* @JoinColumn(name="contact_id", referencedColumnName="contact_id", onDelete="CASCADE")
*/
protected $contact;
public function __construct($number=null)
{
if (!is_null($number)) {
$this->number = $number;
}
}
public function setPhonenumber($number)
{
$this->number = $number;
}
public function setContact(Contact $c)
{
$this->contact = $c;
}
}
?>
<?php
$em = \Doctrine\ORM\EntityManager::create($connectionOptions, $config);
$contact = new Contact("John Doe");
$phone1 = new Phonenumber("8173333333");
$phone2 = new Phonenumber("8174444444");
$em->persist($phone1);
$em->persist($phone2);
$contact->addPhonenumber($phone1);
$contact->addPhonenumber($phone2);
$em->persist($contact);
try {
$em->flush();
} catch(Exception $e) {
$m = $e->getMessage();
echo $m . "<br />\n";
}
If you now do
# doctrine orm:schema-tool:create --dump-sql
you will see that the same SQL will be generated as in the first, raw-SQL example
Set width of dropdown element in HTML select dropdown options
HTML:
<select class="shortenedSelect">
<option value="0" disabled>Please select an item</option>
<option value="1">Item text goes in here but it is way too long to fit inside a select option that has a fixed width adding more</option>
</select>
CSS:
.shortenedSelect {
max-width: 350px;
}
Javascript:
// Shorten select option text if it stretches beyond max-width of select element
$.each($('.shortenedSelect option'), function(key, optionElement) {
var curText = $(optionElement).text();
$(this).attr('title', curText);
// Tip: parseInt('350px', 10) removes the 'px' by forcing parseInt to use a base ten numbering system.
var lengthToShortenTo = Math.round(parseInt($(this).parent('select').css('max-width'), 10) / 7.3);
if (curText.length > lengthToShortenTo) {
$(this).text('... ' + curText.substring((curText.length - lengthToShortenTo), curText.length));
}
});
// Show full name in tooltip after choosing an option
$('.shortenedSelect').change(function() {
$(this).attr('title', ($(this).find('option:eq('+$(this).get(0).selectedIndex +')').attr('title')));
});
Works perfectly. I had the same issue myself. Check out this JSFiddle http://jsfiddle.net/jNWS6/426/
Can I start the iPhone simulator without "Build and Run"?
Use Spotlight.
But only the last simulator will be opened. If you used iPad Air 2 last time, Spotlight will open it. If you wanna open iPhone 6s this time, that's a problem.
PostgreSQL Exception Handling
Just want to add my two cents on this old post:
In my opinion, almost all of relational database engines include a commit transaction execution automatically after execute a DDL command even when you have autocommit=false, So you don't need to start a transaction to avoid a potential truncated object creation because It is completely unnecessary.
Returning an array using C
You can do it using heap memory (through malloc() invocation) like other answers reported here, but you must always manage the memory (use free() function everytime you call your function). You can also do it with a static array:
char* returnArrayPointer()
{
static char array[SIZE];
// do something in your array here
return array;
}
You can than use it without worrying about memory management.
int main()
{
char* myArray = returnArrayPointer();
/* use your array here */
/* don't worry to free memory here */
}
In this example you must use static keyword in array definition to set to application-long the array lifetime, so it will not destroyed after return statement. Of course, in this way you occupy SIZE bytes in your memory for the entire application life, so size it properly!
TokenMismatchException in VerifyCsrfToken.php Line 67
output_buffering=4096;
always_populate_raw_post_data=-1;
upload_max_filesize=120M;
create user.ini file in public_html and put above three values in user.ini file solved my issue
In Python, how do I split a string and keep the separators?
Here is a simple .split solution that works without regex.
This is an answer for Python split() without removing the delimiter, so not exactly what the original post asks but the other question was closed as a duplicate for this one.
def splitkeep(s, delimiter):
split = s.split(delimiter)
return [substr + delimiter for substr in split[:-1]] + [split[-1]]
Random tests:
import random
CHARS = [".", "a", "b", "c"]
assert splitkeep("", "X") == [""] # 0 length test
for delimiter in ('.', '..'):
for _ in range(100000):
length = random.randint(1, 50)
s = "".join(random.choice(CHARS) for _ in range(length))
assert "".join(splitkeep(s, delimiter)) == s
How to convert list data into json in java
public static List<Product> getCartList() {
JSONObject responseDetailsJson = new JSONObject();
JSONArray jsonArray = new JSONArray();
List<Product> cartList = new Vector<Product>(cartMap.keySet().size());
for(Product p : cartMap.keySet()) {
cartList.add(p);
JSONObject formDetailsJson = new JSONObject();
formDetailsJson.put("id", "1");
formDetailsJson.put("name", "name1");
jsonArray.add(formDetailsJson);
}
responseDetailsJson.put("forms", jsonArray);//Here you can see the data in json format
return cartList;
}
you can get the data in the following form
{
"forms": [
{ "id": "1", "name": "name1" },
{ "id": "2", "name": "name2" }
]
}
How to downgrade Java from 9 to 8 on a MACOS. Eclipse is not running with Java 9
You can remove "JavaAppletPlugin.plugin" found in Spotlight or Finder, then re-install downloaded Java 8.
This will simply solve your problem.
Unloading classes in java?
If you're live watching if unloading class worked in JConsole or something, try also adding java.lang.System.gc() at the end of your class unloading logic. It explicitly triggers Garbage Collector.
what is the difference between const_iterator and iterator?
Performance wise there is no difference. The only purpose of having const_iterator over iterator is to manage the accessesibility of the container on which the respective iterator runs. You can understand it more clearly with an example:
std::vector<int> integers{ 3, 4, 56, 6, 778 };
If we were to read & write the members of a container we will use iterator:
for( std::vector<int>::iterator it = integers.begin() ; it != integers.end() ; ++it )
{*it = 4; std::cout << *it << std::endl; }
If we were to only read the members of the container integers you might wanna use const_iterator which doesn't allow to write or modify members of container.
for( std::vector<int>::const_iterator it = integers.begin() ; it != integers.end() ; ++it )
{ cout << *it << endl; }
NOTE: if you try to modify the content using *it in second case you will get an error because its read-only.
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication
we are using MSMQ in our system, this error message came. The reason was our queue was full and we did not handle the error logging mechanism properly so we were getting the above exception instead of msmq ful. We cleared the messages then it is working fine.
PHP multiline string with PHP
Another option would be to use the if with a colon and an endif instead of the brackets:
<?php if ( has_post_thumbnail() ): ?>
<div class="gridly-image">
<a href="<?php the_permalink(); ?>">
<?php the_post_thumbnail('summary-image', array('class' => 'overlay', 'title'=> the_title('Read Article ',' now',false) )); ?>
</a>
</div>
<?php endif; ?>
<div class="date">
<span class="day"><?php the_time('d'); ?></span>
<div class="holder">
<span class="month"><?php the_time('M'); ?></span>
<span class="year"><?php the_time('Y'); ?></span>
</div>
</div>
Detecting arrow key presses in JavaScript
Re answers that you need keydown not keypress.
Assuming you want to move something continuously while the key is pressed, I find that keydown works for all browsers except Opera. For Opera, keydown only triggers on 1st press. To accommodate Opera use:
document.onkeydown = checkKey;
document.onkeypress = checkKey;
function checkKey(e)
{ etc etc
How to check all versions of python installed on osx and centos
Here is a cleaner way to show them (technically without symbolic links):
ls -1 /usr/bin/python* | grep '[2-3].[0-9]$'
Where grep filters the output of ls that that has that numeric pattern at the end ($).
Or using find:
find /usr/bin/python* ! -type l
Which shows all the different (!) of symbolic link type (-type l).
Javascript - Regex to validate date format
Make use of brackets /^\d{2}[.-/]\d{2}[.-/]\d{4}$/
http://download.oracle.com/javase/tutorial/essential/regex/char_classes.html
What is the difference between Digest and Basic Authentication?
Let us see the difference between the two HTTP authentication using Wireshark (Tool to analyse packets sent or received) .
1. Http Basic Authentication
As soon as the client types in the correct username:password,as requested by the Web-server, the Web-Server checks in the Database if the credentials are correct and gives the access to the resource .
Here is how the packets are sent and received :
In the first packet the Client fill the credentials using the POST method at the resource - lab/webapp/basicauth .In return the server replies back with http response code 200 ok ,i.e, the username:password were correct .
Now , In the Authorization header it shows that it is Basic Authorization followed by some random string .This String is the encoded (Base64) version of the credentials admin:aadd (including colon ) .
2 . Http Digest Authentication(rfc 2069)
So far we have seen that the Basic Authentication sends username:password in plaintext over the network .But the Digest Auth sends a HASH of the Password using Hash algorithm.
Here are packets showing the requests made by the client and response from the server .
As soon as the client types the credentials requested by the server , the Password is converted to a response using an algorithm and then is sent to the server , If the server Database has same response as given by the client the server gives the access to the resource , otherwise a 401 error .
In the above Authorization , the response string is calculated using the values of Username,Realm,Password,http-method,URI and Nonce as shown in the image :
(colons are included)
Hence , we can see that the Digest Authentication is more Secure as it involve Hashing (MD5 encryption) , So the packet sniffer tools cannot sniff the Password although in Basic Auth the exact Password was shown on Wireshark.
How do I undo a checkout in git?
You probably want git checkout master, or git checkout [branchname].
Getting the name of a variable as a string
I try to get name from inspect locals, but it cann't process var likes a[1], b.val. After it, I got a new idea --- get var name from the code, and I try it succ! code like below:
#direct get from called function code
def retrieve_name_ex(var):
stacks = inspect.stack()
try:
func = stacks[0].function
code = stacks[1].code_context[0]
s = code.index(func)
s = code.index("(", s + len(func)) + 1
e = code.index(")", s)
return code[s:e].strip()
except:
return ""
Sending SOAP request using Python Requests
It is indeed possible.
Here is an example calling the Weather SOAP Service using plain requests lib:
import requests
url="http://wsf.cdyne.com/WeatherWS/Weather.asmx?WSDL"
#headers = {'content-type': 'application/soap+xml'}
headers = {'content-type': 'text/xml'}
body = """<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:ns0="http://ws.cdyne.com/WeatherWS/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
<SOAP-ENV:Header/>
<ns1:Body><ns0:GetWeatherInformation/></ns1:Body>
</SOAP-ENV:Envelope>"""
response = requests.post(url,data=body,headers=headers)
print response.content
Some notes:
- The headers are important. Most SOAP requests will not work without the correct headers.
application/soap+xmlis probably the more correct header to use (but the weatherservice preferstext/xml - This will return the response as a string of xml - you would then need to parse that xml.
- For simplicity I have included the request as plain text. But best practise would be to store this as a template, then you can load it using jinja2 (for example) - and also pass in variables.
For example:
from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('myapp', 'templates'))
template = env.get_template('soaprequests/WeatherSericeRequest.xml')
body = template.render()
Some people have mentioned the suds library. Suds is probably the more correct way to be interacting with SOAP, but I often find that it panics a little when you have WDSLs that are badly formed (which, TBH, is more likely than not when you're dealing with an institution that still uses SOAP ;) ).
You can do the above with suds like so:
from suds.client import Client
url="http://wsf.cdyne.com/WeatherWS/Weather.asmx?WSDL"
client = Client(url)
print client ## shows the details of this service
result = client.service.GetWeatherInformation()
print result
Note: when using suds, you will almost always end up needing to use the doctor!
Finally, a little bonus for debugging SOAP; TCPdump is your friend. On Mac, you can run TCPdump like so:
sudo tcpdump -As 0
This can be helpful for inspecting the requests that actually go over the wire.
The above two code snippets are also available as gists:
React Native add bold or italics to single words in <Text> field
you can use https://www.npmjs.com/package/react-native-parsed-text
import ParsedText from 'react-native-parsed-text';_x000D_
_x000D_
class Example extends React.Component {_x000D_
static displayName = 'Example';_x000D_
_x000D_
handleUrlPress(url) {_x000D_
LinkingIOS.openURL(url);_x000D_
}_x000D_
_x000D_
handlePhonePress(phone) {_x000D_
AlertIOS.alert(`${phone} has been pressed!`);_x000D_
}_x000D_
_x000D_
handleNamePress(name) {_x000D_
AlertIOS.alert(`Hello ${name}`);_x000D_
}_x000D_
_x000D_
handleEmailPress(email) {_x000D_
AlertIOS.alert(`send email to ${email}`);_x000D_
}_x000D_
_x000D_
renderText(matchingString, matches) {_x000D_
// matches => ["[@michel:5455345]", "@michel", "5455345"]_x000D_
let pattern = /\[(@[^:]+):([^\]]+)\]/i;_x000D_
let match = matchingString.match(pattern);_x000D_
return `^^${match[1]}^^`;_x000D_
}_x000D_
_x000D_
render() {_x000D_
return (_x000D_
<View style={styles.container}>_x000D_
<ParsedText_x000D_
style={styles.text}_x000D_
parse={_x000D_
[_x000D_
{type: 'url', style: styles.url, onPress: this.handleUrlPress},_x000D_
{type: 'phone', style: styles.phone, onPress: this.handlePhonePress},_x000D_
{type: 'email', style: styles.email, onPress: this.handleEmailPress},_x000D_
{pattern: /Bob|David/, style: styles.name, onPress: this.handleNamePress},_x000D_
{pattern: /\[(@[^:]+):([^\]]+)\]/i, style: styles.username, onPress: this.handleNamePress, renderText: this.renderText},_x000D_
{pattern: /42/, style: styles.magicNumber},_x000D_
{pattern: /#(\w+)/, style: styles.hashTag},_x000D_
]_x000D_
}_x000D_
childrenProps={{allowFontScaling: false}}_x000D_
>_x000D_
Hello this is an example of the ParsedText, links like http://www.google.com or http://www.facebook.com are clickable and phone number 444-555-6666 can call too._x000D_
But you can also do more with this package, for example Bob will change style and David too. [email protected]_x000D_
And the magic number is 42!_x000D_
#react #react-native_x000D_
</ParsedText>_x000D_
</View>_x000D_
);_x000D_
}_x000D_
}_x000D_
_x000D_
const styles = StyleSheet.create({_x000D_
container: {_x000D_
flex: 1,_x000D_
justifyContent: 'center',_x000D_
alignItems: 'center',_x000D_
backgroundColor: '#F5FCFF',_x000D_
},_x000D_
_x000D_
url: {_x000D_
color: 'red',_x000D_
textDecorationLine: 'underline',_x000D_
},_x000D_
_x000D_
email: {_x000D_
textDecorationLine: 'underline',_x000D_
},_x000D_
_x000D_
text: {_x000D_
color: 'black',_x000D_
fontSize: 15,_x000D_
},_x000D_
_x000D_
phone: {_x000D_
color: 'blue',_x000D_
textDecorationLine: 'underline',_x000D_
},_x000D_
_x000D_
name: {_x000D_
color: 'red',_x000D_
},_x000D_
_x000D_
username: {_x000D_
color: 'green',_x000D_
fontWeight: 'bold'_x000D_
},_x000D_
_x000D_
magicNumber: {_x000D_
fontSize: 42,_x000D_
color: 'pink',_x000D_
},_x000D_
_x000D_
hashTag: {_x000D_
fontStyle: 'italic',_x000D_
},_x000D_
_x000D_
});How can I add a hint or tooltip to a label in C# Winforms?
just another way to do it.
Label lbl = new Label();
new ToolTip().SetToolTip(lbl, "tooltip text here");
How to use XPath in Python?
libxml2 has a number of advantages:
- Compliance to the spec
- Active development and a community participation
- Speed. This is really a python wrapper around a C implementation.
- Ubiquity. The libxml2 library is pervasive and thus well tested.
Downsides include:
- Compliance to the spec. It's strict. Things like default namespace handling are easier in other libraries.
- Use of native code. This can be a pain depending on your how your application is distributed / deployed. RPMs are available that ease some of this pain.
- Manual resource handling. Note in the sample below the calls to freeDoc() and xpathFreeContext(). This is not very Pythonic.
If you are doing simple path selection, stick with ElementTree ( which is included in Python 2.5 ). If you need full spec compliance or raw speed and can cope with the distribution of native code, go with libxml2.
Sample of libxml2 XPath Use
import libxml2
doc = libxml2.parseFile("tst.xml")
ctxt = doc.xpathNewContext()
res = ctxt.xpathEval("//*")
if len(res) != 2:
print "xpath query: wrong node set size"
sys.exit(1)
if res[0].name != "doc" or res[1].name != "foo":
print "xpath query: wrong node set value"
sys.exit(1)
doc.freeDoc()
ctxt.xpathFreeContext()
Sample of ElementTree XPath Use
from elementtree.ElementTree import ElementTree
mydoc = ElementTree(file='tst.xml')
for e in mydoc.findall('/foo/bar'):
print e.get('title').textHow can I show data using a modal when clicking a table row (using bootstrap)?
The best practice is to ajax load the order information when click tr tag, and render the information html in $('#orderDetails') like this:
$.get('the_get_order_info_url', { order_id: the_id_var }, function(data){
$('#orderDetails').html(data);
}, 'script')
Alternatively, you can add class for each td that contains the order info, and use jQuery method $('.class').html(html_string) to insert specific order info into your #orderDetails BEFORE you show the modal, like:
<% @restaurant.orders.each do |order| %>
<!-- you should add more class and id attr to help control the DOM -->
<tr id="order_<%= order.id %>" onclick="orderModal(<%= order.id %>);">
<td class="order_id"><%= order.id %></td>
<td class="customer_id"><%= order.customer_id %></td>
<td class="status"><%= order.status %></td>
</tr>
<% end %>
js:
function orderModal(order_id){
var tr = $('#order_' + order_id);
// get the current info in html table
var customer_id = tr.find('.customer_id');
var status = tr.find('.status');
// U should work on lines here:
var info_to_insert = "order: " + order_id + ", customer: " + customer_id + " and status : " + status + ".";
$('#orderDetails').html(info_to_insert);
$('#orderModal').modal({
keyboard: true,
backdrop: "static"
});
};
That's it. But I strongly recommend you to learn sth about ajax on Rails. It's pretty cool and efficient.
AttributeError: 'str' object has no attribute 'strftime'
you should change cr_date(str) to datetime object then you 'll change the date to the specific format:
cr_date = '2013-10-31 18:23:29.000227'
cr_date = datetime.datetime.strptime(cr_date, '%Y-%m-%d %H:%M:%S.%f')
cr_date = cr_date.strftime("%m/%d/%Y")
Angular 2 Sibling Component Communication
This is not what you exactly want but for sure will help you out
I'm surprised there's not more information out there about component communication <=> consider this tutorial by angualr2
For sibling components communication, I'd suggest to go with sharedService. There are also other options available though.
import {Component,bind} from 'angular2/core';
import {bootstrap} from 'angular2/platform/browser';
import {HTTP_PROVIDERS} from 'angular2/http';
import {NameService} from 'src/nameService';
import {TheContent} from 'src/content';
import {Navbar} from 'src/nav';
@Component({
selector: 'app',
directives: [TheContent,Navbar],
providers: [NameService],
template: '<navbar></navbar><thecontent></thecontent>'
})
export class App {
constructor() {
console.log('App started');
}
}
bootstrap(App,[]);
Please refer to link at top for more code.
Edit: This is a very small demo. You have already mention that you have already tried with sharedService. So please consider this tutorial by angualr2 for more information.
Is there a way to run Python on Android?
One more option seems to be pyqtdeploy which citing the docs is:
a tool that, in conjunction with other tools provided with Qt, enables the deployment of PyQt4 and PyQt5 applications written with Python v2.7 or Python v3.3 or later. It supports deployment to desktop platforms (Linux, Windows and OS X) and to mobile platforms (iOS and Android).
According to Deploying PyQt5 application to Android via pyqtdeploy and Qt5 it is actively developed, although it is difficult to find examples of working Android apps or tutorial on how to cross-compile all the required libraries to Android. It is an interesting project to keep in mind though!
How to create custom exceptions in Java?
For a checked exception:
public class MyCustomException extends Exception { }
Technically, anything that extends Throwable can be an thrown, but exceptions are generally extensions of the Exception class so that they're checked exceptions (except RuntimeException or classes based on it, which are not checked), as opposed to the other common type of throwable, Errors which usually are not something designed to be gracefully handled beyond the JVM internals.
You can also make exceptions non-public, but then you can only use them in the package that defines them, as opposed to across packages.
As far as throwing/catching custom exceptions, it works just like the built-in ones - throw via
throw new MyCustomException()
and catch via
catch (MyCustomException e) { }
Disabling browser print options (headers, footers, margins) from page?
Any recent version of Chrome and Opera, as well as Firefox 48 alpha 1 and greater
You can set the page margin to a size that's too small to contain the text in order to disable this (borrowing from awe's answer):
@page {
size: auto; /* auto is the initial value */
margin: 0mm; /* this affects the margin in the printer settings */
}
html {
background-color: #FFFFFF;
margin: 0px; /* this affects the margin on the HTML before sending to printer */
}
body {
border: solid 1px blue;
margin: 10mm 15mm 10mm 15mm; /* margin you want for the content */
}<ol>
<li>
<a href="data:,No Javascript :-(" target="_blank">Middle-click to open in new tab</a>
</li>
<li>
<a href="javascript:print()">Print</a>
</li>
</ol><!-- Hack to work around stack snippet restrictions --><script type=application/javascript>document.links[0].href="data:text/html;charset=utf-8,"+encodeURIComponent('<!doctype html>'+document.documentElement.outerHTML)</script>For versions of Firefox up to 48 alpha 1
You can add a mozNoMarginBoxes attribute to the <html> tag to prevent the URL, page numbers and other things Firefox adds to the page margin from being printed.
It is working in Firefox 29 and onwards. You can see a screen shot of the difference here, or see here for a live example.
Note that the mozDisallowSelectionPrint attribute in the example is not required to remove the text from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?.
Other browsers
Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts.
The same goes for Safari; according to a comment by @Luiz Perez, the most recent versions of Safari (8, 9.1 and 10) still do not support @page for suppressing margin texts.
I can't find anything on Edge and I don't have a Windows 10 installation available to test.
GlobalConfiguration.Configure() not present after Web API 2 and .NET 4.5.1 migration
GlobalConfiguration.Configure API is available in "Microsoft.AspNet.WebApi.WebHost" version="5.2.3"
and not in "Microsoft.AspNet.WebApi.WebHost" version="4.0.0"
Java: How to Indent XML Generated by Transformer
Neither of the suggested solutions worked for me. So I kept on searching for an alternative solution, which ended up being a mixture of the two before mentioned and a third step.
- set the indent-number into the transformerfactory
- enable the indent in the transformer
- wrap the otuputstream with a writer (or bufferedwriter)
//(1)
TransformerFactory tf = TransformerFactory.newInstance();
tf.setAttribute("indent-number", new Integer(2));
//(2)
Transformer t = tf.newTransformer();
t.setOutputProperty(OutputKeys.INDENT, "yes");
//(3)
t.transform(new DOMSource(doc),
new StreamResult(new OutputStreamWriter(out, "utf-8"));
You must do (3) to workaround a "buggy" behavior of the xml handling code.
Source: johnnymac75 @ http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6296446
(If I have cited my source incorrectly please let me know)
React Native version mismatch
For me it was due to react-native version in dependency section of package.json file. It was:
"dependencies": {
"expo": "^27.0.1",
"react": "16.3.1",
"react-native": "~0.55.0"
}
I chaged it to:
"dependencies": {
"expo": "^27.0.1",
"react": "16.3.1",
"react-native": "0.52.0"
}
Now it works fine.
Converting an int to std::string
You can use this function to convert int to std::string after including <sstream>:
#include <sstream>
string IntToString (int a)
{
stringstream temp;
temp<<a;
return temp.str();
}
How to read/write files in .Net Core?
Package: System.IO.FileSystem
System.IO.File.ReadAllText("MyTextFile.txt"); ?
MySql Query Replace NULL with Empty String in Select
UPDATE your_table set your_field="" where your_field is null
Convert String to double in Java
Using Double.parseDouble() without surrounding try/catch block can cause potential NumberFormatException had the input double string not conforming to a valid format.
Guava offers a utility method for this which returns null in case your String can't be parsed.
Double valueDouble = Doubles.tryParse(aPotentiallyCorruptedDoubleString);
In runtime, a malformed String input yields null assigned to valueDouble
jQuery .load() call doesn't execute JavaScript in loaded HTML file
You've almost got it. Tell jquery you want to load only the script:
$("#myBtn").click(function() {
$("#myDiv").load("trackingCode.html script");
});
addClass and removeClass in jQuery - not removing class
Use .on()
you need event delegation as these classes are not present on DOM when DOM is ready.
$(document).on("click", ".clickable", function () {
$(this).addClass("grown");
$(this).removeClass("spot");
});
$(document).on("click", ".close_button", function () {
$("#spot1").removeClass("grown");
$("#spot1").addClass("spot");
});
Formatting a double to two decimal places
Well, depending on your needs you can choose any of the following. Out put is written against each method
You can choose the one you need
This will round
decimal d = 2.5789m;
Console.WriteLine(d.ToString("#.##")); // 2.58
This will ensure that 2 decimal places are written.
d = 2.5m;
Console.WriteLine(d.ToString("F")); //2.50
if you want to write commas you can use this
d=23545789.5432m;
Console.WriteLine(d.ToString("n2")); //23,545,789.54
if you want to return the rounded of decimal value you can do this
d = 2.578m;
d = decimal.Round(d, 2, MidpointRounding.AwayFromZero); //2.58
Response::json() - Laravel 5.1
However, the previous answer could still be confusing for some programmers. Most especially beginners who are most probably using an older book or tutorial. Or perhaps you still feel the facade is needed. Sure you can use it. Me for one I still love to use the facade, this is because some times while building my api I forget to use the '\' before the Response.
if you are like me, simply add
"use Response;"
above your class ...extends contoller. this should do.
with this you can now use:
$response = Response::json($posts, 200);
instead of:
$response = \Response::json($posts, 200);
Regex match text between tags
var root = document.createElement("div");
root.innerHTML = "My name is <b>Bob</b>, I'm <b>20</b> years old, I like <b>programming</b>.";
var texts = [].map.call( root.querySelectorAll("b"), function(v){
return v.textContent || v.innerText || "";
});
//["Bob", "20", "programming"]
Setting unique Constraint with fluent API?
Here is an extension method for setting unique indexes more fluently:
public static class MappingExtensions
{
public static PrimitivePropertyConfiguration IsUnique(this PrimitivePropertyConfiguration configuration)
{
return configuration.HasColumnAnnotation("Index", new IndexAnnotation(new IndexAttribute { IsUnique = true }));
}
}
Usage:
modelBuilder
.Entity<Person>()
.Property(t => t.Name)
.IsUnique();
Will generate migration such as:
public partial class Add_unique_index : DbMigration
{
public override void Up()
{
CreateIndex("dbo.Person", "Name", unique: true);
}
public override void Down()
{
DropIndex("dbo.Person", new[] { "Name" });
}
}
Src: Creating Unique Index with Entity Framework 6.1 fluent API
MYSQL Truncated incorrect DOUBLE value
Mainly invalid query strings will give this warning.
Wrong due to a subtle syntax error (misplaced right parenthesis) when using INSTR function:
INSERT INTO users (user_name) SELECT name FROM site_users WHERE
INSTR(status, 'active'>0);
Correct:
INSERT INTO users (user_name) SELECT name FROM site_users WHERE
INSTR(status, 'active')>0;
Need to find element in selenium by css
You can describe your css selection like cascading style sheet dows:
protected override void When()
{
SUT.Browser.FindElements(By.CssSelector("#carousel > a.tiny.button"))
}
Printing object properties in Powershell
My solution to this problem was to use the $() sub-expression block.
Add-Type -Language CSharp @"
public class Thing{
public string Name;
}
"@;
$x = New-Object Thing
$x.Name = "Bill"
Write-Output "My name is $($x.Name)"
Write-Output "This won't work right: $x.Name"
Gives:
My name is Bill
This won't work right: Thing.Name
Javascript: formatting a rounded number to N decimals
I think that there is a more simple approach to all given here, and is the method Number.toFixed() already implemented in JavaScript.
simply write:
var myNumber = 2;
myNumber.toFixed(2); //returns "2.00"
myNumber.toFixed(1); //returns "2.0"
etc...
format a Date column in a Data Frame
try this package, works wonders, and was made for date/time...
library(lubridate)
Portfolio$Date2 <- mdy(Portfolio.all$Date2)
Cannot run the macro... the macro may not be available in this workbook
You also run into this issue when you are creating routine in a class module.
When you try to run the code externally, you get this error.
You can't assign macro to button to a member of a class module either.
If you try to run from within the code by pressing green play button you will also see the same error.
Either move the routine in to a regular module or create a new routine in a regular module that calls the class member.
Downloading a picture via urllib and python
A simpler solution may be(python 3):
import urllib.request
import os
os.chdir("D:\\comic") #your path
i=1;
s="00000000"
while i<1000:
try:
urllib.request.urlretrieve("http://www.gunnerkrigg.com//comics/"+ s[:8-len(str(i))]+ str(i)+".jpg",str(i)+".jpg")
except:
print("not possible" + str(i))
i+=1;
How do I parse a URL query parameters, in Javascript?
You could get a JavaScript object containing the parameters with something like this:
var regex = /[?&]([^=#]+)=([^&#]*)/g,
url = window.location.href,
params = {},
match;
while(match = regex.exec(url)) {
params[match[1]] = match[2];
}
The regular expression could quite likely be improved. It simply looks for name-value pairs, separated by = characters, and pairs themselves separated by & characters (or an = character for the first one). For your example, the above would result in:
{v: "123", p: "hello"}
Here's a working example.
How To Check If A Key in **kwargs Exists?
if kwarg.__len__() != 0:
print(kwarg)
Difference between a User and a Login in SQL Server
In Short,
Logins will have the access of the server.
and
Users will have the access of the database.
Fastest way to convert a dict's keys & values from `unicode` to `str`?
DATA = { u'spam': u'eggs', u'foo': frozenset([u'Gah!']), u'bar': { u'baz': 97 },
u'list': [u'list', (True, u'Maybe'), set([u'and', u'a', u'set', 1])]}
def convert(data):
if isinstance(data, basestring):
return str(data)
elif isinstance(data, collections.Mapping):
return dict(map(convert, data.iteritems()))
elif isinstance(data, collections.Iterable):
return type(data)(map(convert, data))
else:
return data
print DATA
print convert(DATA)
# Prints:
# {u'list': [u'list', (True, u'Maybe'), set([u'and', u'a', u'set', 1])], u'foo': frozenset([u'Gah!']), u'bar': {u'baz': 97}, u'spam': u'eggs'}
# {'bar': {'baz': 97}, 'foo': frozenset(['Gah!']), 'list': ['list', (True, 'Maybe'), set(['and', 'a', 'set', 1])], 'spam': 'eggs'}
Assumptions:
- You've imported the collections module and can make use of the abstract base classes it provides
- You're happy to convert using the default encoding (use
data.encode('utf-8')rather thanstr(data)if you need an explicit encoding).
If you need to support other container types, hopefully it's obvious how to follow the pattern and add cases for them.
Get all files and directories in specific path fast
I know this is old, but... Another option may be to use the FileSystemWatcher like so:
void SomeMethod()
{
System.IO.FileSystemWatcher m_Watcher = new System.IO.FileSystemWatcher();
m_Watcher.Path = path;
m_Watcher.Filter = "*.*";
m_Watcher.NotifyFilter = m_Watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
m_Watcher.Created += new FileSystemEventHandler(OnChanged);
m_Watcher.EnableRaisingEvents = true;
}
private void OnChanged(object sender, FileSystemEventArgs e)
{
string path = e.FullPath;
lock (listLock)
{
pathsToUpload.Add(path);
}
}
This would allow you to watch the directories for file changes with an extremely lightweight process, that you could then use to store the names of the files that changed so that you could back them up at the appropriate time.
no match for ‘operator<<’ in ‘std::operator
You need to overload operator << for mystruct class
Something like :-
friend ostream& operator << (ostream& os, const mystruct& m)
{
os << m.m_a <<" " << m.m_b << endl;
return os ;
}
See here
Is there are way to make a child DIV's width wider than the parent DIV using CSS?
To make child div as wide as the content, try this:
.child{
position:absolute;
left:0;
overflow:visible;
white-space:nowrap;
}
Compare cell contents against string in Excel
You can use the EXACT Function for exact string comparisons.
=IF(EXACT(A1, "ENG"), 1, 0)
Assign null to a SqlParameter
Try this:
if (AgeItem.AgeIndex != null)
{
SqlParameter[] parameters = new SqlParameter[1];
SqlParameter planIndexParameter = new SqlParameter("@AgeIndex", SqlDbType.Int);
planIndexParameter.Value = AgeItem.AgeIndex;
parameters[0] = planIndexParameter;
}
In other words, if the parameter is null just don't send it to your stored proc (assuming, of course, that the stored proc accepts null parameters which is implicit in your question).
curl -GET and -X GET
The use of -X [WHATEVER] merely changes the request's method string used in the HTTP request. This is easier to understand with two examples — one with -X [WHATEVER] and one without — and the associated HTTP request headers for each:
# curl -XPANTS -o nul -v http://neverssl.com/
* Connected to neverssl.com (13.224.86.126) port 80 (#0)
> PANTS / HTTP/1.1
> Host: neverssl.com
> User-Agent: curl/7.42.0
> Accept: */*
# curl -o nul -v http://neverssl.com/
* Connected to neverssl.com (13.33.50.167) port 80 (#0)
> GET / HTTP/1.1
> Host: neverssl.com
> User-Agent: curl/7.42.0
> Accept: */*
Angular: How to download a file from HttpClient?
After spending much time searching for a response to this answer: how to download a simple image from my API restful server written in Node.js into an Angular component app, I finally found a beautiful answer in this web Angular HttpClient Blob. Essentially it consist on:
API Node.js restful:
/* After routing the path you want ..*/
public getImage( req: Request, res: Response) {
// Check if file exist...
if (!req.params.file) {
return res.status(httpStatus.badRequest).json({
ok: false,
msg: 'File param not found.'
})
}
const absfile = path.join(STORE_ROOT_DIR,IMAGES_DIR, req.params.file);
if (!fs.existsSync(absfile)) {
return res.status(httpStatus.badRequest).json({
ok: false,
msg: 'File name not found on server.'
})
}
res.sendFile(path.resolve(absfile));
}
Angular 6 tested component service (EmployeeService on my case):
downloadPhoto( name: string) : Observable<Blob> {
const url = environment.api_url + '/storer/employee/image/' + name;
return this.http.get(url, { responseType: 'blob' })
.pipe(
takeWhile( () => this.alive),
filter ( image => !!image));
}
Template
<img [src]="" class="custom-photo" #photo>
Component subscriber and use:
@ViewChild('photo') image: ElementRef;
public LoadPhoto( name: string) {
this._employeeService.downloadPhoto(name)
.subscribe( image => {
const url= window.URL.createObjectURL(image);
this.image.nativeElement.src= url;
}, error => {
console.log('error downloading: ', error);
})
}
How to develop or migrate apps for iPhone 5 screen resolution?
If you have an app built for iPhone 4S or earlier, it'll run letterboxed on iPhone 5.
To adapt your app to the new taller screen, the first thing you do is to change the launch image to: [email protected]. Its size should be 1136x640 (HxW). Yep, having the default image in the new screen size is the key to let your app take the whole of new iPhone 5's screen.
(Note that the naming convention works only for the default image. Naming another image "[email protected]" will not cause it to be loaded in place of "[email protected]". If you need to load different images for different screen sizes, you'll have to do it programmatically.)
If you're very very lucky, that might be it... but in all likelihood, you'll have to take a few more steps.
- Make sure, your Xibs/Views use auto-layout to resize themselves.
- Use springs and struts to resize views.
- If this is not good enough for your app, design your xib/storyboard for one specific screen size and reposition programmatically for the other.
In the extreme case (when none of the above suffices), design the two Xibs and load the appropriate one in the view controller.
To detect screen size:
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
{
CGSize result = [[UIScreen mainScreen] bounds].size;
if(result.height == 480)
{
// iPhone Classic
}
if(result.height == 568)
{
// iPhone 5
}
}
Add 2 hours to current time in MySQL?
The DATE_ADD() function will do the trick. (You can also use the ADDTIME() function if you're running at least v4.1.1.)
For your query, this would be:
SELECT *
FROM courses
WHERE DATE_ADD(now(), INTERVAL 2 HOUR) > start_time
Or,
SELECT *
FROM courses
WHERE ADDTIME(now(), '02:00:00') > start_time
Is it possible to run .php files on my local computer?
Sure you just need to setup a local web server. Check out XAMPP: http://www.apachefriends.org/en/xampp.html
That will get you up and running in about 10 minutes.
There is now a way to run php locally without installing a server: https://stackoverflow.com/a/21872484/672229
Yes but the files need to be processed. For example you can install test servers like mamp / lamp / wamp depending on your plateform.
Basically you need apache / php running.
Java Comparator class to sort arrays
[...] How should Java Comparator class be declared to sort the arrays by their first elements in decreasing order [...]
Here's a complete example using Java 8:
import java.util.*;
public class Test {
public static void main(String args[]) {
int[][] twoDim = { {1, 2}, {3, 7}, {8, 9}, {4, 2}, {5, 3} };
Arrays.sort(twoDim, Comparator.comparingInt(a -> a[0])
.reversed());
System.out.println(Arrays.deepToString(twoDim));
}
}
Output:
[[8, 9], [5, 3], [4, 2], [3, 7], [1, 2]]
For Java 7 you can do:
Arrays.sort(twoDim, new Comparator<int[]>() {
@Override
public int compare(int[] o1, int[] o2) {
return Integer.compare(o2[0], o1[0]);
}
});
If you unfortunate enough to work on Java 6 or older, you'd do:
Arrays.sort(twoDim, new Comparator<int[]>() {
@Override
public int compare(int[] o1, int[] o2) {
return ((Integer) o2[0]).compareTo(o1[0]);
}
});
What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
You don't need to specify the module path per se. CMake ships with its own set of built-in find_package scripts, and their location is in the default CMAKE_MODULE_PATH.
The more normal use case for dependent projects that have been CMakeified would be to use CMake's external_project command and then include the Use[Project].cmake file from the subproject. If you just need the Find[Project].cmake script, copy it out of the subproject and into your own project's source code, and then you won't need to augment the CMAKE_MODULE_PATH in order to find the subproject at the system level.
Java: unparseable date exception
From Oracle docs, Date.toString() method convert Date object to a String of the specific form - do not use toString method on Date object. Try to use:
String stringDate = new SimpleDateFormat(YOUR_STRING_PATTERN).format(yourDateObject);
Next step is parse stringDate to Date:
Date date = new SimpleDateFormat(OUTPUT_PATTERN).parse(stringDate);
Note that, parse method throws ParseException
How to convert CharSequence to String?
By invoking its toString() method.
Returns a string containing the characters in this sequence in the same order as this sequence. The length of the string will be the length of this sequence.
How to add column if not exists on PostgreSQL?
With Postgres 9.6 this can be done using the option if not exists
ALTER TABLE table_name ADD COLUMN IF NOT EXISTS column_name INTEGER;
jQuery.inArray(), how to use it right?
$.inArray returns the index of the element if found or -1 if it isn't -- not a boolean value. So the correct is
if(jQuery.inArray("test", myarray) != -1) {
console.log("is in array");
} else {
console.log("is NOT in array");
}
How to change the type of a field?
Starting Mongo 4.2, db.collection.update() can accept an aggregation pipeline, finally allowing the update of a field based on its own value:
// { a: "45", b: "x" }
// { a: 53, b: "y" }
db.collection.update(
{ a : { $type: 1 } },
[{ $set: { a: { $toString: "$a" } } }],
{ multi: true }
)
// { a: "45", b: "x" }
// { a: "53", b: "y" }
The first part
{ a : { $type: 1 } }is the match query:- It filters which documents to update.
- In this case, since we want to convert
"a"to string when its value is a double, this matches elements for which"a"is of type1(double)). - This table provides the codes representing the different possible types.
The second part
[{ $set: { a: { $toString: "$a" } } }]is the update aggregation pipeline:- Note the squared brackets signifying that this update query uses an aggregation pipeline.
$setis a new aggregation operator (Mongo 4.2) which in this case modifies a field.- This can be simply read as
"$set"the value of"a"to"$a"converted"$toString". - What's really new here, is being able in
Mongo 4.2to reference the document itself when updating it: the new value for"a"is based on the existing value of"$a". - Also note
"$toString"which is a new aggregation operator introduced inMongo 4.0.
Don't forget
{ multi: true }, otherwise only the first matching document will be updated.
In case your cast isn't from double to string, you have the choice between different conversion operators introduced in Mongo 4.0 such as $toBool, $toInt, ...
And if there isn't a dedicated converter for your targeted type, you can replace { $toString: "$a" } with a $convert operation: { $convert: { input: "$a", to: 2 } } where the value for to can be found in this table:
db.collection.update(
{ a : { $type: 1 } },
[{ $set: { a: { $convert: { input: "$a", to: 2 } } } }],
{ multi: true }
)
How do I get logs/details of ansible-playbook module executions?
If you pass the -v flag to ansible-playbook on the command line, you'll see the stdout and stderr for each task executed:
$ ansible-playbook -v playbook.yaml
Ansible also has built-in support for logging. Add the following lines to your ansible configuration file:
[defaults]
log_path=/path/to/logfile
Ansible will look in several places for the config file:
ansible.cfgin the current directory where you ranansible-playbook~/.ansible.cfg/etc/ansible/ansible.cfg
Output data with no column headings using PowerShell
The -expandproperty does not work with more than 1 object. You can use this one :
Select-Object Name | ForEach-Object {$_.Name}
If there is more than one value then :
Select-Object Name, Country | ForEach-Object {$_.Name + " " + $Country}
Using Google Text-To-Speech in Javascript
The below JavaScript code sends "text" to be spoken/converted to mp3 audio to google cloud text-to-speech API and gets mp3 audio content as response back.
var text-to-speech = function(state) {
const url = 'https://texttospeech.googleapis.com/v1beta1/text:synthesize?key=GOOGLE_API_KEY'
const data = {
'input':{
'text':'Android is a mobile operating system developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.'
},
'voice':{
'languageCode':'en-gb',
'name':'en-GB-Standard-A',
'ssmlGender':'FEMALE'
},
'audioConfig':{
'audioEncoding':'MP3'
}
};
const otherparam={
headers:{
"content-type":"application/json; charset=UTF-8"
},
body:JSON.stringify(data),
method:"POST"
};
fetch(url,otherparam)
.then(data=>{return data.json()})
.then(res=>{console.log(res.audioContent); })
.catch(error=>{console.log(error);state.onError(error)})
};
Recursive query in SQL Server
Sample of the Recursive Level:
DECLARE @VALUE_CODE AS VARCHAR(5);
--SET @VALUE_CODE = 'A' -- Specify a level
WITH ViewValue AS
(
SELECT ValueCode
, ValueDesc
, PrecedingValueCode
FROM ValuesTable
WHERE PrecedingValueCode IS NULL
UNION ALL
SELECT A.ValueCode
, A.ValueDesc
, A.PrecedingValueCode
FROM ValuesTable A
INNER JOIN ViewValue V ON
V.ValueCode = A.PrecedingValueCode
)
SELECT ValueCode, ValueDesc, PrecedingValueCode
FROM ViewValue
--WHERE PrecedingValueCode = @VALUE_CODE -- Specific level
--WHERE PrecedingValueCode IS NULL -- Root
Read all contacts' phone numbers in android
Accepted answer working but not given unique numbers.
See this code, it return unique numbers.
public static void readContacts(Context context) {
if (context == null)
return;
ContentResolver contentResolver = context.getContentResolver();
if (contentResolver == null)
return;
String[] fieldListProjection = {
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER,
ContactsContract.Contacts.HAS_PHONE_NUMBER
};
Cursor phones = contentResolver
.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI
, fieldListProjection, null, null, null);
HashSet<String> normalizedNumbersAlreadyFound = new HashSet<>();
if (phones != null && phones.getCount() > 0) {
while (phones.moveToNext()) {
String normalizedNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER));
if (Integer.parseInt(phones.getString(phones.getColumnIndex(
ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
if (normalizedNumbersAlreadyFound.add(normalizedNumber)) {
String id = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));
String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
Log.d("test", " Print all values");
}
}
}
phones.close();
}
}
How to ORDER BY a SUM() in MySQL?
The problem I see here is that "sum" is an aggregate function.
first, you need to fix the query itself.
Select sum(c_counts + f_counts) total, [column to group sums by]
from table
group by [column to group sums by]
then, you can sort it:
Select *
from (query above) a
order by total
EDIT: But see post by Virat. Perhaps what you want is not the sum of your total fields over a group, but just the sum of those fields for each record. In that case, Virat has the right solution.
How do you convert CString and std::string std::wstring to each other?
If you want something more C++-like, this is what I use. Although it depends on Boost, that's just for exceptions. You can easily remove those leaving it to depend only on the STL and the WideCharToMultiByte() Win32 API call.
#include <string>
#include <vector>
#include <cassert>
#include <exception>
#include <boost/system/system_error.hpp>
#include <boost/integer_traits.hpp>
/**
* Convert a Windows wide string to a UTF-8 (multi-byte) string.
*/
std::string WideStringToUtf8String(const std::wstring& wide)
{
if (wide.size() > boost::integer_traits<int>::const_max)
throw std::length_error(
"Wide string cannot be more than INT_MAX characters long.");
if (wide.size() == 0)
return "";
// Calculate necessary buffer size
int len = ::WideCharToMultiByte(
CP_UTF8, 0, wide.c_str(), static_cast<int>(wide.size()),
NULL, 0, NULL, NULL);
// Perform actual conversion
if (len > 0)
{
std::vector<char> buffer(len);
len = ::WideCharToMultiByte(
CP_UTF8, 0, wide.c_str(), static_cast<int>(wide.size()),
&buffer[0], static_cast<int>(buffer.size()), NULL, NULL);
if (len > 0)
{
assert(len == static_cast<int>(buffer.size()));
return std::string(&buffer[0], buffer.size());
}
}
throw boost::system::system_error(
::GetLastError(), boost::system::system_category);
}
How to use UIScrollView in Storyboard
Disclaimer :- Only for ios 9 and above (Stack View).
If you are deploying your app on ios 9 devices use a stack view. Here are the steps :-
- Add a scroll view with constraints - pin to left, right, bottom, top (without margins) to superview (view)
- Add a stack view with same constraints to scroll view.
- Stack View Other Constraints :- stackView.bottom = view.bottom and stackView.width = scrollView.width
- Start adding your views. The scroll view will decide to scroll based on the size of the stack view (which is essentially your content view)
"Parser Error Message: Could not load type" in Global.asax
Yes, I read all the answers. However, if you are me and have been pulling out all of what's left of your hair, then try checking the \bin folder. Like most proj files might have several configurations grouped under the XML element PropertyGroup, then I changed the OutputPath value from 'bin\Debug' to remove the '\Debug' part and Rebuild. This placed the files in the \bin folder allowing the Express IIS to find and load the build. I am left wondering what is the correct way to manage these different builds so that a local debug deploy is able to find and load the target environment.
When should I use double or single quotes in JavaScript?
Strictly speaking, there is no difference in meaning; so the choice comes down to convenience.
Here are several factors that could influence your choice:
- House style: Some groups of developers already use one convention or the other.
- Client-side requirements: Will you be using quotes within the strings? (See Ady's answer.)
- Server-side language: VB.NET people might choose to use single quotes for JavaScript so that the scripts can be built server-side (VB.NET uses double-quotes for strings, so the JavaScript strings are easy to distinguished if they use single quotes).
- Library code: If you're using a library that uses a particular style, you might consider using the same style yourself.
- Personal preference: You might think one or other style looks better.
How can I remove a character from a string using JavaScript?
Your first func is almost right. Just remove the 'g' flag which stands for 'global' (edit) and give it some context to spot the second 'r'.
Edit: didn't see it was the second 'r' before so added the '/'. Needs \/ to escape the '/' when using a regEx arg. Thanks for the upvotes but I was wrong so I'll fix and add more detail for people interested in understanding the basics of regEx better but this would work:
mystring.replace(/\/r/, '/')
Now for the excessive explanation:
When reading/writing a regEx pattern think in terms of: <a character or set of charcters> followed by <a character or set of charcters> followed by <...
In regEx <a character or set of charcters> could be one at a time:
/each char in this pattern/
So read as e, followed by a, followed by c, etc...
Or a single <a character or set of charcters> could be characters described by a character class:
/[123!y]/
//any one of these
/[^123!y]/
//anything but one of the chars following '^' (very useful/performance enhancing btw)
Or expanded on to match a quantity of characters (but still best to think of as a single element in terms of the sequential pattern):
/a{2}/
//precisely two 'a' chars - matches identically as /aa/ would
/[aA]{1,3}/
//1-3 matches of 'a' or 'A'
/[a-zA-Z]+/
//one or more matches of any letter in the alphabet upper and lower
//'-' denotes a sequence in a character class
/[0-9]*/
//0 to any number of matches of any decimal character (/\d*/ would also work)
So smoosh a bunch together:
var rePattern = /[aA]{4,8}(Eat at Joes|Joes all you can eat)[0-5]+/g
var joesStr = 'aaaAAAaaEat at Joes123454321 or maybe aAaAJoes all you can eat098765';
joesStr.match(rePattern);
//returns ["aaaAAAaaEat at Joes123454321", "aAaAJoes all you can eat0"]
//without the 'g' after the closing '/' it would just stop at the first match and return:
//["aaaAAAaaEat at Joes123454321"]
And of course I've over-elaborated but my point was simply that this:
/cat/
is a series of 3 pattern elements (a thing followed by a thing followed by a thing).
And so is this:
/[aA]{4,8}(Eat at Joes|Joes all you can eat)[0-5]+/
As wacky as regEx starts to look, it all breaks down to series of things (potentially multi-character things) following each other sequentially. Kind of a basic point but one that took me a while to get past so I've gone overboard explaining it here as I think it's one that would help the OP and others new to regEx understand what's going on. The key to reading/writing regEx is breaking it down into those pieces.
How to make exe files from a node.js app?
Haven't tried it, but nexe looks like nexe can do this:
How to resolve compiler warning 'implicit declaration of function memset'
Old question but I had similar issue and I solved it by adding
extern void* memset(void*, int, size_t);
or just
extern void* memset();
at the top of translation unit ( *.c file ).
Passing Multiple route params in Angular2
Two Methods for Passing Multiple route params in Angular
Method-1
In app.module.ts
Set path as component2.
imports: [
RouterModule.forRoot(
[ {path: 'component2/:id1/:id2', component: MyComp2}])
]
Call router to naviagte to MyComp2 with multiple params id1 and id2.
export class MyComp1 {
onClick(){
this._router.navigate( ['component2', "id1","id2"]);
}
}
Method-2
In app.module.ts
Set path as component2.
imports: [
RouterModule.forRoot(
[ {path: 'component2', component: MyComp2}])
]
Call router to naviagte to MyComp2 with multiple params id1 and id2.
export class MyComp1 {
onClick(){
this._router.navigate( ['component2', {id1: "id1 Value", id2:
"id2 Value"}]);
}
}
How to drop a list of rows from Pandas dataframe?
I solved this in a simpler way - just in 2 steps.
Make a dataframe with unwanted rows/data.
Use the index of this unwanted dataframe to drop the rows from the original dataframe.
Example:
Suppose you have a dataframe df which as many columns including 'Age' which is an integer. Now let's say you want to drop all the rows with 'Age' as negative number.
df_age_negative = df[ df['Age'] < 0 ] # Step 1
df = df.drop(df_age_negative.index, axis=0) # Step 2
Hope this is much simpler and helps you.
Which to use <div class="name"> or <div id="name">?
Read the spec for the attributes and for CSS.
idmust be unique.classdoes not have to beidhas higher (highest!) specificity in CSS- Elements can have multiple non-ordinal classes (separated by spaces), but only one
id - It is faster to select an element by it's ID when querying the DOM
idcan be used as an anchor target (using the fragment of the request) for any element.nameonly works with anchors (<a>)
How to make a transparent HTML button?
Make a div and use your image ( png with transparent background ) as the background of the div, then you can apply any text within that div to hover over the button. Something like this:
<div class="button" onclick="yourbuttonclickfunction();" >
Your Button Label Here
</div>
CSS:
.button {
height:20px;
width:40px;
background: url("yourimage.png");
}
VBA using ubound on a multidimensional array
Looping D3 ways;
Sub SearchArray()
Dim arr(3, 2) As Variant
arr(0, 0) = "A"
arr(0, 1) = "1"
arr(0, 2) = "w"
arr(1, 0) = "B"
arr(1, 1) = "2"
arr(1, 2) = "x"
arr(2, 0) = "C"
arr(2, 1) = "3"
arr(2, 2) = "y"
arr(3, 0) = "D"
arr(3, 1) = "4"
arr(3, 2) = "z"
Debug.Print "Loop Dimension 1"
For i = 0 To UBound(arr, 1)
Debug.Print "arr(" & i & ", 0) is " & arr(i, 0)
Next i
Debug.Print ""
Debug.Print "Loop Dimension 2"
For j = 0 To UBound(arr, 2)
Debug.Print "arr(0, " & j & ") is " & arr(0, j)
Next j
Debug.Print ""
Debug.Print "Loop Dimension 1 and 2"
For i = 0 To UBound(arr, 1)
For j = 0 To UBound(arr, 2)
Debug.Print "arr(" & i & ", " & j & ") is " & arr(i, j)
Next j
Next i
Debug.Print ""
End Sub
Convert tabs to spaces in Notepad++
To convert existing tabs to spaces, press Edit->Blank Operations->TAB to Space.
If in the future you want to enter spaces instead of tab when you press tab key:
- Go to
Settings->Preferences...->Language(since version 7.1) orSettings->Preferences...->Tab Settings(previous versions) - Check
Replace by space - (Optional) You can set the number of spaces to use in place of a Tab by changing the
Tab sizefield.
Return Index of an Element in an Array Excel VBA
The only (& even though cumbersome but yet expedient / relatively quick) way I can do this, is to concatenate the any-dimensional array, and reduce it to 1 dimension, with "/[column number]//\|" as the delimiter.
& use a single-cell result multiple lookupall macro function on the this 1-d column.
& then index match to pull out the positions. (usuing multiple find match)
That way you get all matching occurrences of the element/string your looking for, in the original any-dimension array, and their positions. In one cell.
Wish I could write a macro / function for this entire process. It would save me more fuss.
Multiple maven repositories in one gradle file
In short you have to do like this
repositories {
maven { url "http://maven.springframework.org/release" }
maven { url "https://maven.fabric.io/public" }
}
Detail:
You need to specify each maven URL in its own curly braces. Here is what I got working with skeleton dependencies for the web services project I’m going to build up:
apply plugin: 'java'
sourceCompatibility = 1.7
version = '1.0'
repositories {
maven { url "http://maven.springframework.org/release" }
maven { url "http://maven.restlet.org" }
mavenCentral()
}
dependencies {
compile group:'org.restlet.jee', name:'org.restlet', version:'2.1.1'
compile group:'org.restlet.jee', name:'org.restlet.ext.servlet',version.1.1'
compile group:'org.springframework', name:'spring-web', version:'3.2.1.RELEASE'
compile group:'org.slf4j', name:'slf4j-api', version:'1.7.2'
compile group:'ch.qos.logback', name:'logback-core', version:'1.0.9'
testCompile group:'junit', name:'junit', version:'4.11'
}