% mysql --user=root mysql
CREATE USER 'monty'@'localhost' IDENTIFIED BY 'some_pass';
GRANT ALL PRIVILEGES ON *.* TO 'monty'@'localhost' WITH GRANT OPTION;
CREATE USER 'monty'@'%' IDENTIFIED BY 'some_pass';
GRANT ALL PRIVILEGES ON *.* TO 'monty'@'%' WITH GRANT OPTION;
CREATE USER 'admin'@'localhost';
GRANT RELOAD,PROCESS ON *.* TO 'admin'@'localhost';
CREATE USER 'dummy'@'localhost';
FLUSH PRIVILEGES;
I have got the solution for my query:
i have done something like this:
cell.innerHTML="<img height=40 width=40 alt='' src='<%=request.getContextPath()%>/writeImage.htm?' onerror='onImgError(this);' onLoad='setDefaultImage(this);'>"
function setDefaultImage(source){
var badImg = new Image();
badImg.src = "video.png";
var cpyImg = new Image();
cpyImg.src = source.src;
if(!cpyImg.width)
{
source.src = badImg.src;
}
}
function onImgError(source){
source.src = "video.png";
source.onerror = "";
return true;
}
This way it's working in all browsers.
This answer is based on the ones provided by @Sasan and @CAD bloke.
If you wish to use this in .NET Standard 2 or don't want Newtonsoft, see Xaniff's answer below
JsonConvert
)builder.Entity<YourEntity>().Property(p => p.Strings)
.HasConversion(
v => JsonConvert.SerializeObject(v),
v => JsonConvert.DeserializeObject<List<string>>(v));
Using the EF Core fluent configuration we serialize/deserialize the List
to/from JSON.
Why this code is the perfect mix of everything you could strive for:
SUPER-SHIFT-p > File: Revert File
is the only way
(where SUPER
is Command
on Mac and Ctrl
on PC)
With openpyxl
version 2.4.0
and pandas
version 0.19.2
, the process @ski came up with gets a bit simpler:
import pandas
from openpyxl import load_workbook
with pandas.ExcelWriter('Masterfile.xlsx', engine='openpyxl') as writer:
writer.book = load_workbook('Masterfile.xlsx')
data_filtered.to_excel(writer, "Main", cols=['Diff1', 'Diff2'])
#That's it!
i got this to work. you just need to change the variables
$query ="SELECT `column_name` FROM `information_schema`.`columns` WHERE `table_schema`='" . $_SESSION['db'] . "' AND `table_name`='" . $table . "' ";
$stmt = $dbh->prepare($query);
$stmt->execute();
$columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
$query="SELECT name FROM `" . $database . "`.`" . $table . "` WHERE ( ";
foreach ( $columns as $column ) {
$query .=" CONVERT( `" . $column['column_name'] . "` USING utf8 ) LIKE '%" . $search . "%' OR ";
}
$query = substr($query, 0, -3);
$query .= ")";
echo $query . "<br>";
$stmt=$dbh->prepare($query);
$stmt->execute();
$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo "<pre>";
print_r ($results );
echo "</pre>";
None of the solution are working currently. Here is my solution. You can add prefixes.
box-shadow: inset 0px 0px 0px 0px red;
Enable "resolveJsonModule": true
in tsconfig.json
file and implement as below code, it's work for me:
const config = require('./config.json');
A better JQuery answer would be:
$('#ParentContainer').scroll(function() {
$('#FixedDiv').animate({top:$(this).scrollTop()});
});
You can also add a number after scrollTop i.e .scrollTop() + 5 to give it buff.
A good suggestion would also to limit the duration to 100 and go from default swing to linear easing.
$('#ParentContainer').scroll(function() {
$('#FixedDiv').animate({top:$(this).scrollTop()},100,"linear");
})
try to use the array_unique()
this elminates duplicated data inside the list of your arrays..
int i = 65;
char c = Convert.ToChar(i);
I used the below code and it worked for me:
@InjectMocks
private ClassABC classABC;
@Before
public void setUp() {
ReflectionTestUtils.setField(classABC, "constantFromConfigFile", 3);
}
Reference: https://www.jeejava.com/mock-an-autowired-value-field-in-spring-with-junit-mockito/
Here is a piece of my Android app's code:
This app is able to communicate with a HTTP get-post model between a servlet running on a server and an Android device plugged in USB-Debuggable mode (because the app was in developing progress).
I also can run the app over Wi-Fi when the server, Tomcat Apache 7, running on (when the app development was finished).
To get the IP address of yours
ipconfig
In the list, IPv4 Address is your IP.
For those of you who are building on a MacOS, and don't like leaving your password in clear text on your machine, you can use the keychain tool to store the credentials and then inject it into the build. Credits go to Viktor Eriksson. https://pilloxa.gitlab.io/posts/safer-passwords-in-gradle/
Single quotes will not parse PHP variables inside of them. Either use double quotes or use a dot to extend the echo.
$variableName = 'Ralph';
echo 'Hello '.$variableName.'!';
OR
echo "Hello $variableName!";
And in your case:
$i = 1;
echo '<p class="paragraph'.$i.'"></p>';
++i;
OR
$i = 1;
echo "<p class='paragraph$i'></p>";
++i;
df[df.duplicated(['ID'], keep=False)]
it'll return all duplicated rows back to you.
According to documentation:
keep : {‘first’, ‘last’, False}, default ‘first’
- first : Mark duplicates as True except for the first occurrence.
- last : Mark duplicates as True except for the last occurrence.
- False : Mark all duplicates as True.
ROUTER LINK DIRECTIVE:
[routerLink]="link" //when u pass URL value from COMPONENT file
[routerLink]="['link','parameter']" //when you want to pass some parameters along with route
routerLink="link" //when you directly pass some URL
[routerLink]="['link']" //when you directly pass some URL
The precise algorithm for INNER JOIN
, LEFT/RIGHT OUTER JOIN
are as following:
a
(a, b[i])
ON ...
clause against each pair: ON( a, b[i] ) = true/false?
true
, return that combined row (a, b[i])
.Outer Join
then return a (virtual) pair using Null
for all columns of other table: (a, Null)
for LEFT outer join or (Null, b)
for RIGHT outer join. This is to ensure all rows of first table exists in final results.Note: the condition specified in ON
clause could be anything, it is not required to use Primary Keys (and you don't need to always refer to Columns from both tables)! For example:
... ON T1.title = T2.title AND T1.version < T2.version
( => see this post as a sample usage: Select only rows with max value on a column)... ON T1.y IS NULL
... ON 1 = 0
(just as sample)Note: Left Join = Left Outer Join, Right Join = Right Outer Join.
What I use on the start of literally every CSS file I use is the following:
html, body{
margin: 0;
padding: 0;
min-width: 100%;
width: 100%;
max-width: 100%;
min-height: 100%;
height: 100%;
max-height: 100%;
}
The margin of 0 ensures that the HTML and BODY elements aren't being auto-positioned by the browser to have some space to the left or right of them.
The padding of 0 ensures that the HTML and BODY elements aren't automatically pushing everything inside them down or right because of browser defaults.
The width and height variants are set to 100% to ensure that the browser doesn't resize them in anticipation of actually having an auto-set margin or padding, with min and max set just in case some weird, unexplainable stuff happens, though you probably dont need them.
This solution also means that, like I did when I first started on HTML and CSS several years ago, you won't have to give your first <div>
a margin:-8px;
to make it fit in the corner of the browser window.
Before I posted, I looked at my other fullscreen CSS project and found that all I used there was just body{margin:0;}
and nothing else, which has worked fine over the 2 years I've been working on it.
Hope this detailed answer helps, and I feel your pain. In my eyes, it is dumb that browsers should set an invisible boundary on the left and sometimes top side of the body/html elements.
Here is answer for your question.
db.getCollection('users').aggregate([
{$match : {admin : 1}},
{$lookup: {from: "posts",localField: "_id",foreignField: "owner_id",as: "posts"}},
{$project : {
posts : { $filter : {input : "$posts" , as : "post", cond : { $eq : ['$$post.via' , 'facebook'] } } },
admin : 1
}}
])
Or either you can go with mongodb group option.
db.getCollection('users').aggregate([
{$match : {admin : 1}},
{$lookup: {from: "posts",localField: "_id",foreignField: "owner_id",as: "posts"}},
{$unwind : "$posts"},
{$match : {"posts.via":"facebook"}},
{ $group : {
_id : "$_id",
posts : {$push : "$posts"}
}}
])
Similar to this question.
In essence it means that the method Bar
will not modify non mutable member variables of Foo
.
You can use convert
from hablar
to change a column of the data frame quickly.
library(tidyverse)
library(hablar)
x <- tibble(var = c(1.34, 4.45, 6.98))
x %>%
convert(int(var))
gives you:
# A tibble: 3 x 1
var
<int>
1 1
2 4
3 6
dtypes is a Pandas Series. That means it contains index & values attributes. If you only need the column names:
headers = df.dtypes.index
it will return a list containing the column names of "df" dataframe.
Assuming you use the declarative style (i.e. ORM classes), it is pretty easy:
query = db_session.query(User.id, User.name).filter(User.id.in_([123,456]))
results = query.all()
db_session
is your database session here, while User
is the ORM class with __tablename__
equal to "users"
.
Assuming your DateColumn formatted 3312018.0 should be converted to 03/31/2018 as a string. And, some records are missing or 0.
df['DateColumn'] = df['DateColumn'].astype(int)
df['DateColumn'] = df['DateColumn'].astype(str)
df['DateColumn'] = df['DateColumn'].apply(lambda x: x.zfill(8))
df.loc[df['DateColumn'] == '00000000','DateColumn'] = '01011980'
df['DateColumn'] = pd.to_datetime(df['DateColumn'], format="%m%d%Y")
df['DateColumn'] = df['DateColumn'].apply(lambda x: x.strftime('%m/%d/%Y'))
The $.browser
method has been removed as of jQuery 1.9.
The
jQuery.browser()
method has been deprecated since jQuery 1.3 and is removed in 1.9. If needed, it is available as part of the jQuery Migrate plugin. We recommend using feature detection with a library such as Modernizr.
As stated in the Upgrade Guide you can try using the jQuery Migrate plugin to restore this functionality and let jQuery Tools work.
In user crontab (crontab -e
) do not put the user field.
Correct cron is:
0-59 * * * * echo "Hello World"
Syntax with user field is for /etc/crontab
only:
0-59 * * * * mollerhoj3 echo "Hello World"
@kajetons' answer is fully functional.
You can also pass multiple variables by passing them like: use($var1, $var2)
DB::table('users')->where(function ($query) use ($activated,$var2) {
$query->where('activated', '=', $activated);
$query->where('var2', '>', $var2);
})->get();
Vue.set(object, prop, value)
For vuex you will want to do Vue.set(state.object, key, value)
So just for others who come to this question. It appears at some point in Vue 2.* they removed this.items.$set(index, val)
in favor of this.$set(this.items, index, val)
.
Splice is still available and here is a link to array mutation methods available in vue link.
You can do something like that:
uniqueCount = ['a','b','c','d','d','e','a','b','c','f','g','h','h','h','e','a'];
var map = new Object();
for(var i = 0; i < uniqueCount.length; i++) {
if(map[uniqueCount[i]] != null) {
map[uniqueCount[i]] += 1;
} else {
map[uniqueCount[i]] = 1;
}
}
now you have a map with all characters count
Simplest answer:
command.ExecuteScalar()
by default returns the first column
Return Value Type: System.Object The first column of the first row in the result set, or a null reference (Nothing in Visual Basic) if the result set is empty. Returns a maximum of 2033 characters.
Copied from MSDN
This is how I do it.
try:
do_something()
except:
# How can I log my exception here, complete with its traceback?
import traceback
traceback.format_exc() # this will print a complete trace to stout.
You just have to put it under separate folders with different names depending on orientation and resolution, the device will automatically select the right one for its screen settings
More info here:
http://developer.android.com/guide/practices/screens_support.html
under "Resource directory qualifiers for screen size and density"
try this :
function getChartJs() {
**var dynamicColors = function () {
var r = Math.floor(Math.random() * 255);
var g = Math.floor(Math.random() * 255);
var b = Math.floor(Math.random() * 255);
return "rgb(" + r + "," + g + "," + b + ")";
}**
$.ajax({
type: "POST",
url: "ADMIN_DEFAULT.aspx/GetChartByJenisKerusakan",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (r) {
var labels = r.d[0];
var series1 = r.d[1];
var data = {
labels: r.d[0],
datasets: [
{
label: "My First dataset",
data: series1,
strokeColor: "#77a8a8",
pointColor: "#eca1a6"
}
]
};
var ctx = $("#bar_chart").get(0).getContext('2d');
ctx.canvas.height = 300;
ctx.canvas.width = 500;
var lineChart = new Chart(ctx).Bar(data, {
bezierCurve: false,
title:
{
display: true,
text: "ProductWise Sales Count"
},
responsive: true,
maintainAspectRatio: true
});
$.each(r.d, function (key, value) {
**lineChart.datasets[0].bars[key].fillColor = dynamicColors();
lineChart.datasets[0].bars[key].fillColor = dynamicColors();**
lineChart.update();
});
},
failure: function (r) {
alert(r.d);
},
error: function (r) {
alert(r.d);
}
});
}
Multiple generic constraints can't be combined in an OR fashion (less restrictive), only in an AND fashion (more restrictive). Meaning that one method can't handle both scenarios. The generic constraints also cannot be used to make a unique signature for the method, so you'd have to use 2 separate method names.
However, you can use the generic constraints to make sure that the methods are used correctly.
In my case, I specifically wanted null to be returned, and never the default value of any possible value types. GetValueOrDefault = bad. GetValueOrNull = good.
I used the words "Null" and "Nullable" to distinguish between reference types and value types. And here is an example of a couple extension methods I wrote that compliments the FirstOrDefault method in System.Linq.Enumerable class.
public static TSource FirstOrNull<TSource>(this IEnumerable<TSource> source)
where TSource: class
{
if (source == null) return null;
var result = source.FirstOrDefault(); // Default for a class is null
return result;
}
public static TSource? FirstOrNullable<TSource>(this IEnumerable<TSource?> source)
where TSource : struct
{
if (source == null) return null;
var result = source.FirstOrDefault(); // Default for a nullable is null
return result;
}
This article:
may be if interest to you.
In a couple of words, this query:
SELECT d1.short_code
FROM domain1 d1
LEFT JOIN
domain2 d2
ON d2.short_code = d1.short_code
WHERE d2.short_code IS NULL
will work but it is less efficient than a NOT NULL
(or NOT EXISTS
) construct.
You can also use this:
SELECT short_code
FROM domain1
EXCEPT
SELECT short_code
FROM domain2
This is using neither NOT IN
nor WHERE
(and even no joins!), but this will remove all duplicates on domain1.short_code
if any.
For frequent uses of this command I found it easy to add the location of C:\xampp\apache\bin
to the PATH
. Use whatever directory you have this installed in.
Then you can run from any directory in command line:
httpd -k restart
The answer above that suggests httpd -k -restart is actually a typo. You can see the commands by running httpd /?
Add this code into your StyleSheet:
margin-top:80px;
I too needed a rounded ImageView, I used the below code, you can modify it accordingly:
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class RoundedImageView extends ImageView {
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}
Bitmap b = ((BitmapDrawable) drawable).getBitmap();
Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
int w = getWidth();
@SuppressWarnings("unused")
int h = getHeight();
Bitmap roundBitmap = getCroppedBitmap(bitmap, w);
canvas.drawBitmap(roundBitmap, 0, 0, null);
}
public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
Bitmap sbmp;
if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
float factor = smallest / radius;
sbmp = Bitmap.createScaledBitmap(bmp,
(int) (bmp.getWidth() / factor),
(int) (bmp.getHeight() / factor), false);
} else {
sbmp = bmp;
}
Bitmap output = Bitmap.createBitmap(radius, radius, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final String color = "#BAB399";
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, radius, radius);
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor(color));
canvas.drawCircle(radius / 2 + 0.7f, radius / 2 + 0.7f,
radius / 2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);
return output;
}
}
Make sure, that all of your class methods (updateVelocity
, updatePosition
, ...) take at least one positional argument, which is canonically named self
and refers to the current instance of the class.
When you call particle.updateVelocity()
, the called method implicitly gets an argument: the instance, here particle
as first parameter.
I think your assignment is backwards:
a[i] = b[i];
should be:
b[i] = a[i];
You can try using this open source solution that makes dealing with Excel a lot more cleaner.
Covert .ppk to id_rsa using tool PuttyGen, (http://mydailyfindingsit.blogspot.in/2015/08/create-keys-for-your-linux-machine.html) and
scp -C -i ./id_rsa -r /var/www/* [email protected]:/var/www
it should work !
The right way is to use Culture:
System.Globalization.CultureInfo.CurrentCulture.TextInfo.ToTitleCase(word.ToLower())
Note: This will capitalise each word within a string, e.g. "red house" --> "Red House". The solution will also lower-case capitalisation within words, e.g. "old McDonald" --> "Old Mcdonald".
URLs should be case insensitive unless there is a good reason why they are should not be.
This is not mandatory (it is not any part of an RFC) but it makes the communication and storage of URLs far more reliable.
If I have two pages on a website:
http://stackoverflow.com/ABOUT.html
and
http://stackoverflow.com/about.html
How should they differ? Maybe one is written 'shouting style' (caps) - but from an IA point of view, the distinction should never be made by a change in the case of the URL.
Moreover, it is easy to implement this in Apache - just use CheckSpelling On
from mod_Speling.
As per http://content-security-policy.com/ The best place to start:
default-src 'none';
script-src 'self';
connect-src 'self';
img-src 'self';
style-src 'self';
font-src 'self';
Never inline styles or scripts as it undermines the purpose of CSP. You can use a stylesheet to set a style property and then use a function in a .js
file to change the style property (if need be).
On the one hand, the title is helpful as a tooltip when moving the mouse over the element. This could be solved with CSS-> element::after. But it is much more important as an aid for visually impaired people (topic handicap-free website). And for this it MUST be included as an attribute in the HTML element. Everything else is junk, botch, idiot stuff ...!
This should do it:
img {
min-width: 100%;
min-height: 100%;
width: auto;
height: auto;
}
To assign the font to the textView:
TextView textView = (TextView) findViewById(R.id.your_textView);
final Typeface font = Typeface.createFromAsset(context.getAssets(), "fonts/your_font_name");
your_font_name includes font extension.
I usually use numpy sum over the logical condition column:
>>> import numpy as np
>>> import pandas as pd
>>> df = pd.DataFrame({'Age' : [20,24,18,5,78]})
>>> np.sum(df['Age'] > 20)
2
This seems to me slightly shorter than the solution presented above
I believe your 1:m relationships should already implicitly create DISTINCT JOINs.
But, if you're goal is just C's in each A, it might be easier to just use DISTINCT on the outer-most query.
SELECT DISTINCT a.valueA, c.valueC
FROM C
INNER JOIN B ON B.lookupC = C.id
INNER JOIN A ON A.lookupB = B.id
ORDER BY a.valueA, c.valueC
Seems like regular UNIQUE CONSTRAINT :)
CREATE TABLE example (
a integer,
b integer,
c integer,
UNIQUE (a, c));
More here
A fundamental mistake is here:
result = methodInfo.Invoke(methodInfo, parametersArray);
You are invoking the method on an instance of MethodInfo
. You need to pass in an instance of the type of object that you want to invoke on.
result = methodInfo.Invoke(classInstance, parametersArray);
ES6 version:
const angleInRadians = angleInDegrees => (angleInDegrees - 90) * (Math.PI / 180.0);
const polarToCartesian = (centerX, centerY, radius, angleInDegrees) => {
const a = angleInRadians(angleInDegrees);
return {
x: centerX + (radius * Math.cos(a)),
y: centerY + (radius * Math.sin(a)),
};
};
const arc = (x, y, radius, startAngle, endAngle) => {
const fullCircle = endAngle - startAngle === 360;
const start = polarToCartesian(x, y, radius, endAngle - 0.01);
const end = polarToCartesian(x, y, radius, startAngle);
const arcSweep = endAngle - startAngle <= 180 ? '0' : '1';
const d = [
'M', start.x, start.y,
'A', radius, radius, 0, arcSweep, 0, end.x, end.y,
].join(' ');
if (fullCircle) d.push('z');
return d;
};
More generic and short
function findFromArray(array,key,value) {
return array.filter(function (element) {
return element[key] == value;
}).shift();
}
in your case Ex. var element = findFromArray(myArray,'id',45)
that will give you the whole element.
TASKLIST
doesn't set an exit code that you could check in a batch file. One workaround to checking the exit code could be parsing its standard output (which you are presently redirecting to NUL
). Apparently, if the process is found, TASKLIST
will display its details, which include the image name too. Therefore, you could just use FIND
or FINDSTR
to check if the TASKLIST
's output contains the name you have specified in the request. Both FIND
and FINDSTR
set a non-null exit code if the search was unsuccessful. So, this would work:
@echo off
tasklist /fi "imagename eq notepad.exe" | find /i "notepad.exe" > nul
if not errorlevel 1 (taskkill /f /im "notepad.exe") else (
specific commands to perform if the process was not found
)
exit
There's also an alternative that doesn't involve TASKLIST
at all. Unlike TASKLIST
, TASKKILL
does set an exit code. In particular, if it couldn't terminate a process because it simply didn't exist, it would set the exit code of 128. You could check for that code to perform your specific actions that you might need to perform in case the specified process didn't exist:
@echo off
taskkill /f /im "notepad.exe" > nul
if errorlevel 128 (
specific commands to perform if the process
was not terminated because it was not found
)
exit
Following is simple example that may help you:
json_string = """
{
"pk": 1,
"fa": "cc.ee",
"fb": {
"fc": "",
"fd_id": "12345"
}
}"""
import json
data = json.loads(json_string)
if data["fa"] == "cc.ee":
data["fb"]["new_key"] = "cc.ee was present!"
print json.dumps(data)
The output for the above code will be:
{"pk": 1, "fb": {"new_key": "cc.ee was present!", "fd_id": "12345",
"fc": ""}, "fa": "cc.ee"}
Note that you can set the ident argument of dump to print it like so (for example,when using print json.dumps(data , indent=4)):
{
"pk": 1,
"fb": {
"new_key": "cc.ee was present!",
"fd_id": "12345",
"fc": ""
},
"fa": "cc.ee"
}
With Python 3.5 you could do it this way:
import os
import subprocess
my_env = {**os.environ, 'PATH': '/usr/sbin:/sbin:' + os.environ['PATH']}
subprocess.Popen(my_command, env=my_env)
Here we end up with a copy of os.environ
and overridden PATH
value.
It was made possible by PEP 448 (Additional Unpacking Generalizations).
Another example. If you have a default environment (i.e. os.environ
), and a dict you want to override defaults with, you can express it like this:
my_env = {**os.environ, **dict_with_env_variables}
I'm on Ubuntu 11.04 and had similar issues. Installing Node.js fixed it.
As of Ubuntu 13.04 x64 you only need to run:
sudo apt-get install nodejs
This will solve the problem.
sudo yum install nodejs
There are so many difference exist between Serializable and Externalizable but when we compare difference between custom Serializable(overrided writeObject() & readObject()) and Externalizable then we find that custom implementation is tightly bind with ObjectOutputStream class where as in Externalizable case , we ourself provide an implementation of ObjectOutput which may be ObjectOutputStream class or it could be some other like org.apache.mina.filter.codec.serialization.ObjectSerializationOutputStream
In case of Externalizable interface
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeUTF(key);
out.writeUTF(value);
out.writeObject(emp);
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
this.key = in.readUTF();
this.value = in.readUTF();
this.emp = (Employee) in.readObject();
}
**In case of Serializable interface**
/*
We can comment below two method and use default serialization process as well
Sequence of class attributes in read and write methods MUST BE same.
// below will not work it will not work .
// Exception = java.io.StreamCorruptedException: invalid type code: 00\
private void writeObject(java.io.ObjectOutput stream)
*/
private void writeObject(java.io.ObjectOutputStream Outstream)
throws IOException {
System.out.println("from writeObject()");
/* We can define custom validation or business rules inside read/write methods.
This way our validation methods will be automatically
called by JVM, immediately after default serialization
and deserialization process
happens.
checkTestInfo();
*/
stream.writeUTF(name);
stream.writeInt(age);
stream.writeObject(salary);
stream.writeObject(address);
}
private void readObject(java.io.ObjectInputStream Instream)
throws IOException, ClassNotFoundException {
System.out.println("from readObject()");
name = (String) stream.readUTF();
age = stream.readInt();
salary = (BigDecimal) stream.readObject();
address = (Address) stream.readObject();
// validateTestInfo();
}
I have added sample code to explain better. please check in/out object case of Externalizable. These are not bound to any implementation directly.
Where as Outstream/Instream are tightly bind to classes. We can extends ObjectOutputStream/ObjectInputStream but it will a bit difficult to use.
Try this batch :
@echo off
Title List of connected external devices by Hackoo
Mode con cols=100 lines=20 & Color 9E
wmic LOGICALDISK where driveType=2 get deviceID > wmic.txt
for /f "skip=1" %%b IN ('type wmic.txt') DO (echo %%b & pause & Dir %%b)
Del wmic.txt
pause
self.tableView.tableHeaderView = segmentedControl;
If you want it to obey your width and height properly though enclose your segmentedControl in a UIView first as the tableView likes to mangle your view a bit to fit the width.
To align one flex child to the right set it withmargin-left: auto;
From the flex spec:
One use of auto margins in the main axis is to separate flex items into distinct "groups". The following example shows how to use this to reproduce a common UI pattern - a single bar of actions with some aligned on the left and others aligned on the right.
.wrap div:last-child {
margin-left: auto;
}
.wrap {_x000D_
display: flex;_x000D_
background: #ccc;_x000D_
width: 100%;_x000D_
justify-content: space-between;_x000D_
}_x000D_
.wrap div:last-child {_x000D_
margin-left: auto;_x000D_
}_x000D_
.result {_x000D_
background: #ccc;_x000D_
margin-top: 20px;_x000D_
}_x000D_
.result:after {_x000D_
content: '';_x000D_
display: table;_x000D_
clear: both;_x000D_
}_x000D_
.result div {_x000D_
float: left;_x000D_
}_x000D_
.result div:last-child {_x000D_
float: right;_x000D_
}
_x000D_
<div class="wrap">_x000D_
<div>One</div>_x000D_
<div>Two</div>_x000D_
<div>Three</div>_x000D_
</div>_x000D_
_x000D_
<!-- DESIRED RESULT -->_x000D_
<div class="result">_x000D_
<div>One</div>_x000D_
<div>Two</div>_x000D_
<div>Three</div>_x000D_
</div>
_x000D_
Note:
You could achieve a similar effect by setting flex-grow:1 on the middle flex item (or shorthand flex:1
) which would push the last item all the way to the right. (Demo)
The obvious difference however is that the middle item becomes bigger than it may need to be. Add a border to the flex items to see the difference.
.wrap {_x000D_
display: flex;_x000D_
background: #ccc;_x000D_
width: 100%;_x000D_
justify-content: space-between;_x000D_
}_x000D_
.wrap div {_x000D_
border: 3px solid tomato;_x000D_
}_x000D_
.margin div:last-child {_x000D_
margin-left: auto;_x000D_
}_x000D_
.grow div:nth-child(2) {_x000D_
flex: 1;_x000D_
}_x000D_
.result {_x000D_
background: #ccc;_x000D_
margin-top: 20px;_x000D_
}_x000D_
.result:after {_x000D_
content: '';_x000D_
display: table;_x000D_
clear: both;_x000D_
}_x000D_
.result div {_x000D_
float: left;_x000D_
}_x000D_
.result div:last-child {_x000D_
float: right;_x000D_
}
_x000D_
<div class="wrap margin">_x000D_
<div>One</div>_x000D_
<div>Two</div>_x000D_
<div>Three</div>_x000D_
</div>_x000D_
_x000D_
<div class="wrap grow">_x000D_
<div>One</div>_x000D_
<div>Two</div>_x000D_
<div>Three</div>_x000D_
</div>_x000D_
_x000D_
<!-- DESIRED RESULT -->_x000D_
<div class="result">_x000D_
<div>One</div>_x000D_
<div>Two</div>_x000D_
<div>Three</div>_x000D_
</div>
_x000D_
<div id="test">
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
</div>
<div id="test2"></div>
<script type="text/javascript">
var getDiv = document.getElementById('test');
var getSpan = getDiv.getElementsByTagName('span');???
var divDump = document.getElementById('test2');
for (var i=0; i<getSpan.length; i++) {
divDump.innerHTML = divDump.innerHTML + ' ' + getSpan[i].innerHTML;
}
</script>
?
In case, anyone is wondering how to do this, here's one way: (Thanks to Mark again!)
mBox = new TextView(context);
mBox.setText(Html.fromHtml("<b>" + title + "</b>" + "<br />" +
"<small>" + description + "</small>" + "<br />" +
"<small>" + DateAdded + "</small>"));
For an unofficial list of tags supported by this method, refer to this link or this question: Which HTML tags are supported by Android TextView?
Here's a modification to mercurial's answer that uses the subquery on the decode as well, allowing the use of variables in both instances.
DECLARE
@EncodeIn VARCHAR(100) = 'Test String In',
@EncodeOut VARCHAR(500),
@DecodeOut VARCHAR(200)
SELECT @EncodeOut =
CAST(N'' AS XML).value(
'xs:base64Binary(xs:hexBinary(sql:column("bin")))'
, 'VARCHAR(MAX)'
)
FROM (
SELECT CAST(@EncodeIn AS VARBINARY(MAX)) AS bin
) AS bin_sql_server_temp;
PRINT @EncodeOut
SELECT @DecodeOut =
CAST(
CAST(N'' AS XML).value(
'xs:base64Binary(sql:column("bin"))'
, 'VARBINARY(MAX)'
)
AS VARCHAR(MAX)
)
FROM (
SELECT CAST(@EncodeOut AS VARCHAR(MAX)) AS bin
) AS bin_sql_server_temp;
PRINT @DecodeOut
To pass arguments to the jar:
java -jar myjar.jar one two
You can access them in the main() method of "Main-Class" (mentioned in the manifest.mf
file of a JAR).
String one = args[0];
String two = args[1];
The heredoc solutions are certainly the most common way to do this. Other common solutions are:
echo 'line 1, '"${kernel}"' line 2, line 3, '"${distro}"' line 4' > /etc/myconfig.conf
and
exec 3>&1 # Save current stdout exec > /etc/myconfig.conf echo line 1, ${kernel} echo line 2, echo line 3, ${distro} ... exec 1>&3 # Restore stdout
I've had the same requirement, but the solutions here didn't quite get me across the line, due to the source of data for the recyclerView.
I was extracting the RecyclerViews' LinearLayoutManager state in onPause()
private Parcelable state;
Public void onPause() {
state = mLinearLayoutManager.onSaveInstanceState();
}
Parcelable state
is saved in onSaveInstanceState(Bundle outState)
, and extracted again in onCreate(Bundle savedInstanceState)
, when savedInstanceState != null
.
However, the recyclerView adapter is populated and updated by a ViewModel LiveData object returned by a DAO call to a Room database.
mViewModel.getAllDataToDisplay(mSelectedData).observe(this, new Observer<List<String>>() {
@Override
public void onChanged(@Nullable final List<String> displayStrings) {
mAdapter.swapData(displayStrings);
mLinearLayoutManager.onRestoreInstanceState(state);
}
});
I eventually found that restoring the instance state directly after the data is set in the adapter would keep the scroll-state across rotations.
I suspect this either is because the LinearLayoutManager
state that I'd restored was being overwritten when the data was returned by the database call, or the restored state was meaningless against an 'empty' LinearLayoutManager.
If the adapter data is available directly (ie not contigent on a database call), then restoring the instance state on the LinearLayoutManager can be done after the adapter is set on the recyclerView.
The distinction between the two scenarios held me up for ages.
Here is a very simple way to do it by hand. You could also use the <algorithm>
, as Peter suggests.
#include <iostream>
int find(int arr[], int len, int seek)
{
for (int i = 0; i < len; ++i)
{
if (arr[i] == seek) return i;
}
return -1;
}
int main()
{
int arr[ 5 ] = { 4, 1, 3, 2, 6 };
int x = find(arr,5,3);
std::cout << x << std::endl;
}
Looks like the installed driver was in bad state. Here is what I did to make it work:
This time the device got installed properly.
Note that I didn't have to modify winusb.inf file or update any other driver.
Hope this helps.
The fetch mode only says that the association must be fetched. If you want to add restrictions on an associated entity, you must create an alias, or a subcriteria. I generally prefer using aliases, but YMMV:
Criteria c = session.createCriteria(Dokument.class, "dokument");
c.createAlias("dokument.role", "role"); // inner join by default
c.createAlias("role.contact", "contact");
c.add(Restrictions.eq("contact.lastName", "Test"));
return c.list();
This is of course well explained in the Hibernate reference manual, and the javadoc for Criteria even has examples. Read the documentation: it has plenty of useful information.
Using Oracle's sub query factory clause: "WITH", you can select numbers from 1 to 100:
WITH t(n) AS (
SELECT 1 from dual
UNION ALL
SELECT n+1 FROM t WHERE n < 100
)
SELECT * FROM t;
There is nothing wrong with the idea of modifying an element inside a list while traversing it (don't modify the list itself, that's not recommended), but it can be better expressed like this:
for (int i = 0; i < letters.size(); i++) {
letters.set(i, "D");
}
At the end the whole list will have the letter "D"
as its content. It's not a good idea to use an enhanced for
loop in this case, you're not using the iteration variable for anything, and besides you can't modify the list's contents using the iteration variable.
Notice that the above snippet is not modifying the list's structure - meaning: no elements are added or removed and the lists' size remains constant. Simply replacing one element by another doesn't count as a structural modification. Here's the link to the documentation quoted by @ZouZou in the comments, it states that:
A structural modification is any operation that adds or deletes one or more elements, or explicitly resizes the backing array; merely setting the value of an element is not a structural modification
The way I know how to convert an integer into a string is by using the following code:
Integer.toString(int);
and
String.valueOf(int);
If you had an integer i, and a string s, then the following would apply:
int i;
String s = Integer.toString(i); or
String s = String.valueOf(i);
If you wanted to convert a string "s" into an integer "i", then the following would work:
i = Integer.valueOf(s).intValue();
Using the Functional Java library, import these:
import static fj.pre.Monoid.stringMonoid;
import static fj.data.List.list;
import fj.data.List;
... then you can do this:
List<String> ss = list("foo", "bar", "baz");
String s = stringMonoid.join(ss, ", ");
Or, the generic way, if you don't have a list of Strings:
public static <A> String showList(List<A> l, Show<A> s) {
return stringMonoid.join(l.map(s.showS_()), ", ");
}
I don't know how much of this is supported in older or not-so-modern browsers, but I'm using something like this (without the neeed for any libraries):
function visible(element) {
if (element.offsetWidth === 0 || element.offsetHeight === 0) return false;
var height = document.documentElement.clientHeight,
rects = element.getClientRects(),
on_top = function(r) {
var x = (r.left + r.right)/2, y = (r.top + r.bottom)/2;
return document.elementFromPoint(x, y) === element;
};
for (var i = 0, l = rects.length; i < l; i++) {
var r = rects[i],
in_viewport = r.top > 0 ? r.top <= height : (r.bottom > 0 && r.bottom <= height);
if (in_viewport && on_top(r)) return true;
}
return false;
}
It checks that the element has an area > 0 and then it checks if any part of the element is within the viewport and that it is not hidden "under" another element (actually I only check on a single point in the center of the element, so it's not 100% assured -- but you could just modify the script to itterate over all the points of the element, if you really need to...).
Update
Modified on_top function that check every pixel:
on_top = function(r) {
for (var x = Math.floor(r.left), x_max = Math.ceil(r.right); x <= x_max; x++)
for (var y = Math.floor(r.top), y_max = Math.ceil(r.bottom); y <= y_max; y++) {
if (document.elementFromPoint(x, y) === element) return true;
}
return false;
};
Don't know about the performance :)
You are looking for a simple code, like this:
List<string> tagList = new List<string>(new[]
{
"A"
,"B"
,"C"
,"D"
,"E"
});
You can also use a helper function to add spacing after each child.
List<Widget> childrenWithSpacing({
@required List<Widget> children,
double spacing = 8,
}) {
final space = Container(width: spacing, height: spacing);
return children.expand((widget) => [widget, space]).toList();
}
So then, the returned list may be used as a children of a column
Column(
children: childrenWithSpacing(
spacing: 14,
children: [
Text('This becomes a text with an adjacent spacing'),
if (true == true) Text('Also, makes it easy to add conditional widgets'),
],
),
);
I'm not sure though if it's wrong or have a performance penalty to run the children through a helper function for the same goal?
It depends on how you tested it, and possibly on differences in the TCP stack implementation of the personal computer and the server.
For example, if your sendall
always completes immediately (or very quickly) on the personal computer, the connection may simply never have broken during sending. This is very likely if your browser is running on the same machine (since there is no real network latency).
In general, you just need to handle the case where a client disconnects before you're finished, by handling the exception.
Remember that TCP communications are asynchronous, but this is much more obvious on physically remote connections than on local ones, so conditions like this can be hard to reproduce on a local workstation. Specifically, loopback connections on a single machine are often almost synchronous.
Problem 2 is OK, because " System.out.println(set);" means "System.out.println(set.toString());" set is an instance of List, so complier will call List.toString();
public static void test(List<?> set){
set.add(new Long(2)); //--> Error
set.add("2"); //--> Error
System.out.println(set);
}
Element ? will not promise Long and String, so complier will not accept Long and String Object
public static void test(List<String> set){
set.add(new Long(2)); //--> Error
set.add("2"); //--> Work
System.out.println(set);
}
Element String promise it a String, so complier will accept String Object
Problem 3: these symbols are same, but you can give them differet specification. For example:
public <T extends Integer,E extends String> void p(T t, E e) {}
Problem 4: Collection does not allow type parameter covariance. But array does allow covariance.
There are so many ways to do this. The listed ones work great, but here's another way if you have a datetime field:
SELECT [fields]
FROM [table]
WHERE timediff(now(), my_datetime_field) < '24:00:00'
timediff()
returns a time object, so don't make the mistake of comparing it to 86400 (number of seconds in a day), or your output will be all kinds of wrong.
You have to supply to the JLabel an Icon
implementation (i.e ImageIcon
). You can do it trough the setIcon
method, as in your question, or through the JLabel
constructor:
Image image=GenerateImage.toImage(true); //this generates an image file
ImageIcon icon = new ImageIcon(image);
JLabel thumb = new JLabel();
thumb.setIcon(icon);
I recommend you to read the Javadoc for JLabel
, Icon
, and ImageIcon
. Also, you can check the How to Use Labels Tutorial, for more information.
[v[0] for v in sorted(foo.items(), key=lambda(k,v): (v,k))]
Inspired by the insightful answers on this page, I created a mixed approach, which I consider the simplest and more flexible one. What do you think?
First, I define the usage in a variable, which allows me to reuse it in different contexts. The format is very simple, almost WYSIWYG, without the need to add any control characters. This seems reasonably portable to me (I ran it on MacOS and Ubuntu)
__usage="
Usage: $(basename $0) [OPTIONS]
Options:
-l, --level <n> Something something something level
-n, --nnnnn <levels> Something something something n
-h, --help Something something something help
-v, --version Something something something version
"
Then I can simply use it as
echo "$__usage"
or even better, when parsing parameters, I can just echo it there in a one-liner:
levelN=${2:?"--level: n is required!""${__usage}"}
I had the same error message, my mistake was that I had a semicolon at the end of COMMIT TRANSACTION line
p=[2,3,4,4,4]
p.clear()
print(p)
[]
Only with Python 3
Instead of checking, just perform the action (web request, mail, ftp, etc.) and be prepared for the request to fail, which you have to do anyway, even if your check was successful.
Consider the following:
1 - check, and it is OK
2 - start to perform action
3 - network goes down
4 - action fails
5 - lot of good your check did
If the network is down your action will fail just as rapidly as a ping, etc.
1 - start to perform action
2 - if the net is down(or goes down) the action will fail
Connect the phone to a PC, make sure your developer options are enabled. Then, connection type must be MTP or File Transfer. Charge only does not allow USB debugging(disables the option).
I would like to add that you should make sure that the generated config.yml
file when doing ruby dk.rb init
contains the path to the ruby installation you want to use DevKit with. In my case, I had the Heroku Toolbelt installed on my system, which provided its own ruby installation, located at a different place. The config.yml
file used that particular installation, and that's not what I wanted. I had to manually edit the file to point it to the correct one, then continue with ruby dk.rb review
, etc.
You Can use just finish();
everywhere after Activity Start for clear that Activity from Stack.
From Wikipedia (I think that would make a really good answer for the interviewer :P)
Threads differ from traditional multitasking operating system processes in that:
- processes are typically independent, while threads exist as subsets of a process
- processes carry considerable state information, whereas multiple threads within a process share state as well as memory and other resources
- processes have separate address spaces, whereas threads share their address space
- processes interact only through system-provided inter-process communication mechanisms.
- Context switching between threads in the same process is typically faster than context switching between processes.
Example for escaped string with variable:
@some-variable-height: 10px;
...
div {
height: ~"calc(100vh - "@some-variable-height~")";
}
compiles to
div {
height: calc(100vh - 10px );
}
input type=image will do it for you.
use &
in place of &
change to
<string name="magazine">Newspaper & Magazines</string>
Find difference of two matrices first. Then, apply element wise multiplication with numpy's multiply command. After then, find summation of the element wise multiplied new matrix. Finally, find square root of the summation.
def findEuclideanDistance(a, b):
euclidean_distance = a - b
euclidean_distance = np.sum(np.multiply(euclidean_distance, euclidean_distance))
euclidean_distance = np.sqrt(euclidean_distance)
return euclidean_distance
struct emp {
int id;
char *name;
};
struct emp get() {
char *name = "John";
struct emp e1 = {100, name};
return (e1);
}
int main() {
struct emp e2 = get();
printf("%s\n", e2.name);
}
works fine with newer versions of compilers. Just like id, content of the name gets copied to the assigned structure variable.
This problem usually happen if eclipse accidentally compile the main.xml incorrectly. The easiest solution is to delete R.java inside gen directory. Once we delete, than eclipse will generate the new R.java base on the latest main.xml
PEAR::Mail_Mime? Sure, PEAR dependency of (min) 2 files (just mail_mime itself if you edit it to remove the pear dependencies), but it works well. Additionally, most servers have PEAR installed to some extent, and in the best cases they have Pear/Mail and Pear/Mail_Mime. Something that cannot be said for most other libraries offering the same functionality.
You may also consider looking in to PHP's IMAP extension. It's a little more complicated, and requires more setup (not enabled or installed by default), but is must more efficient at compilng and sending messages to an IMAP capable server.
In Java, an initializer with the declaration means the field is always initialized the same way, regardless of which constructor is used (if you have more than one) or the parameters of your constructors (if they have arguments), although a constructor might subsequently change the value (if it is not final). So using an initializer with a declaration suggests to a reader that the initialized value is the value that the field has in all cases, regardless of which constructor is used and regardless of the parameters passed to any constructor. Therefore use an initializer with the declaration only if, and always if, the value for all constructed objects is the same.
Running your code shows an image for me, after adjusting the path. Can you verify that your image path is correct, try absolute path for instance?
You can include git repository to composer.json like this:
"repositories": [
{
"type": "package",
"package": {
"name": "example-package-name", //give package name to anything, must be unique
"version": "1.0",
"source": {
"url": "https://github.com/example-package-name.git", //git url
"type": "git",
"reference": "master" //git branch-name
}
}
}],
"require" : {
"example-package-name": "1.0"
}
You just need to get selenium package imported, that you can do from command prompt using the command
pip install selenium
When you have to use it in any IDE just import this package, no other documentation required to be imported
For Eg :
import selenium
print(selenium.__filepath__)
This is just a general command you may use in starting to check the filepath of selenium
You are accessing the list elements and then using them to attempt to index your list. This is not a good idea. You already have an answer showing how you could use indexing to get your sum list, but another option would be to zip
the list with a slice of itself such that you can sum the pairs.
b = [i + j for i, j in zip(a, a[1:])]
console.log is only defined when the console is open. If you want to check for it in your code make sure you check for for it within the window property
if (window.console)
console.log(msg)
this throws an exception in IE9 and will not work correctly. Do not do this
if (console)
console.log(msg)
Also this is possible:
Dictionary<string, string[]> previousAnswers = null;
This way, we can have unique keys. Hope this works for you.
Here my approach to using fonts in asset pipeline:
1) Put all your font file under app/assets/fonts/
, actually you are not restricted to put it under fonts
folder name. You can put any subfolder name you like. E.g. app/assets/abc
or app/assets/anotherfonts
. But i highly recommend you put it under app/assets/fonts/
for better folder structure.
2) From your sass file, using the sass helper font-path
to request your font assets like this
@font-face {
font-family: 'FontAwesome';
src: url(font-path('fontawesome-webfont.eot') + '?v=4.4.0');
src: url(font-path('fontawesome-webfont.eot') + '?#iefix&v=4.4.0') format('embedded-opentype'),
url(font-path('fontawesome-webfont.woff2') + '?v=4.4.0') format('woff2'),
url(font-path('fontawesome-webfont.woff') + '?v=4.4.0') format('woff'),
url(font-path('fontawesome-webfont.ttf') + '?v=4.4.0') format('truetype'),
url(font-path('fontawesome-webfont.svg') + '?v=4.4.0#fontawesomeregular') format('svg');
font-weight: normal;
font-style: normal;
}
3) Run bundle exec rake assets:precompile
from your local machine and see your application.css result. You should see something like this:
@font-face {
font-family: 'FontAwesome';
src: url("/assets/fontawesome-webfont-d4f5a99224154f2a808e42a441ddc9248ffe78b7a4083684ce159270b30b912a.eot" "?v=4.4.0");
src: url("/assets/fontawesome-webfont-d4f5a99224154f2a808e42a441ddc9248ffe78b7a4083684ce159270b30b912a.eot" "?#iefix&v=4.4.0") format("embedded-opentype"), url("/assets/fontawesome-webfont-3c4a1bb7ce3234407184f0d80cc4dec075e4ad616b44dcc5778e1cfb1bc24019.woff2" "?v=4.4.0") format("woff2"), url("/assets/fontawesome-webfont-a7c7e4930090e038a280fd61d88f0dc03dad4aeaedbd8c9be3dd9aa4c3b6f8d1.woff" "?v=4.4.0") format("woff"), url("/assets/fontawesome-webfont-1b7f3de49d68b01f415574ebb82e6110a1d09cda2071ad8451bdb5124131a292.ttf" "?v=4.4.0") format("truetype"), url("/assets/fontawesome-webfont-7414288c272f6cc10304aa18e89bf24fb30f40afd644623f425c2c3d71fbe06a.svg" "?v=4.4.0#fontawesomeregular") format("svg");
font-weight: normal;
font-style: normal;
}
If you want to know more how asset pipeline work, you can visit the following simple guide: https://designcode.commandrun.com/rails-asset-pipeline-simple-guide-830e2e666f6c#.6lejlayk2
If you are on the first line, pressing (upper case) J will join that line and the next line together, removing the newline. You can also combine this with a count, so pressing 3J
will combine all 3 lines together.
I tried all solutions above (Native, changing url of VCS repository, updating Git, updating IDEA, invalidating Caches), but nothing helped me. Finally I found solution that works for me.
SOLUTION: I closed Idea and replaced content of file ~\.IntelliJIdea20xx.x\config\options\git.xml
with this:
<application>
<component name="Git.Application.Settings">
<option name="SSH_EXECUTABLE" value="IDEA_SSH" />
</component>
</application>
Then I started IDEA, try to checkout SSH GIT repository and it works and existing projects works as well. Interesting fact is that when I switch to NATIVE in Idea Settings, repository not working.
USE THIS FUNCTION BELOW AND MAKE YOUR LIFE EASY
The easiest approach is using regular expressions to detect and replace newlines in the string. In this case, we use replace function along with string to replace with, which in our case is an empty string.
function remove_linebreaks( var message ) {
return message.replace( /[\r\n]+/gm, "" );
}
In the above expression, g and m are for global and multiline flags
You can also use regular expressions (less readable though)
string regex = "^.{0,7}abc";
System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex(regex);
string Value1 = "sssddabcgghh";
Console.WriteLine(reg.Match(Value1).Success);
Version 12.5 of wkhtmltopdf only lists DEB files on their download page now. Being a mac user and not knowing much linux or what DEB files were I couldn't use the solutions posted.
This page helped me get past the knew twist of downloading a DEB file: http://www.g-loaded.eu/2008/01/28/how-to-extract-rpm-or-deb-packages/
Basically what I did was:
Then I found out that the 'exec' function was disabled on my host. So make sure you can specifically run 'exec' if you're using PHP to run this. "Can I run the wkhtmltopdf binary" isn't specific enough. My fault.
What @JosephSilber said, or pass the $event object into ng-click
callback and stop the propagation inside of it:
<div ng-controller="OverlayCtrl" class="overlay" ng-click="hideOverlay()">
<img src="http://some_src" ng-click="nextImage($event)"/>
</div>
$scope.nextImage = function($event) {
$event.stopPropagation();
// Some code to find and display the next image
}
The best practice is to explicitly list the columns:
Insert Into TableName(col1, col2,col2) Values(?, ?, ?)
Otherwise, your original insert will break if you add another column to your table.
Maybe you can leverage the std::bitset
type available in C++11. It can be used to represent a fixed sequence of N
bits, which can be manipulated by conventional logic.
#include<iostream>
#include<bitset>
class MissileLauncher {
public:
MissileLauncher() {}
void show_bits() const {
std::cout<<m_abc[2]<<", "<<m_abc[1]<<", "<<m_abc[0]<<std::endl;
}
bool toggle_a() {
// toggles (i.e., flips) the value of `a` bit and returns the
// resulting logical value
m_abc[0].flip();
return m_abc[0];
}
bool toggle_c() {
// toggles (i.e., flips) the value of `c` bit and returns the
// resulting logical value
m_abc[2].flip();
return m_abc[2];
}
bool matches(const std::bitset<3>& mask) {
// tests whether all the bits specified in `mask` are turned on in
// this instance's bitfield
return ((m_abc & mask) == mask);
}
private:
std::bitset<3> m_abc;
};
typedef std::bitset<3> Mask;
int main() {
MissileLauncher ml;
// notice that the bitset can be "built" from a string - this masks
// can be made available as constants to test whether certain bits
// or bit combinations are "on" or "off"
Mask has_a("001"); // the zeroth bit
Mask has_b("010"); // the first bit
Mask has_c("100"); // the second bit
Mask has_a_and_c("101"); // zeroth and second bits
Mask has_all_on("111"); // all on!
Mask has_all_off("000"); // all off!
// I can even create masks using standard logic (in this case I use
// the or "|" operator)
Mask has_a_and_b = has_a | has_b;
std::cout<<"This should be 011: "<<has_a_and_b<<std::endl;
// print "true" and "false" instead of "1" and "0"
std::cout<<std::boolalpha;
std::cout<<"Bits, as created"<<std::endl;
ml.show_bits();
std::cout<<"is a turned on? "<<ml.matches(has_a)<<std::endl;
std::cout<<"I will toggle a"<<std::endl;
ml.toggle_a();
std::cout<<"Resulting bits:"<<std::endl;
ml.show_bits();
std::cout<<"is a turned on now? "<<ml.matches(has_a)<<std::endl;
std::cout<<"are both a and c on? "<<ml.matches(has_a_and_c)<<std::endl;
std::cout<<"Toggle c"<<std::endl;
ml.toggle_c();
std::cout<<"Resulting bits:"<<std::endl;
ml.show_bits();
std::cout<<"are both a and c on now? "<<ml.matches(has_a_and_c)<<std::endl;
std::cout<<"but, are all bits on? "<<ml.matches(has_all_on)<<std::endl;
return 0;
}
Compiling using gcc 4.7.2
g++ example.cpp -std=c++11
I get:
This should be 011: 011
Bits, as created
false, false, false
is a turned on? false
I will toggle a
Resulting bits:
false, false, true
is a turned on now? true
are both a and c on? false
Toggle c
Resulting bits:
true, false, true
are both a and c on now? true
but, are all bits on? false
I had a requirement to provide a report showing details by month where the date field was formatted as date & time, I simply changed the formatting of the date column to "General" and then used the following formula in a new column,
=CONCATENATE(YEAR(C2),MONTH(C2))
As per this PPI calculation tool, Google Nexus 10 has a display density of about 300 DPI...
However, Android documentation states that:
ldpi : ~120dpi mdpi : ~160dpi hdpi : ~240dpi xhdpi : ~320dpi xxhdpi is not specified.
I think we just let Android OS scale up xhdpi resources...
Try:
git add -A
Warning: Starting with git 2.0 (mid 2013), this will always stage files on the whole working tree.
If you want to stage files under the current path of your working tree, you need to use:
git add -A .
Also see: Difference of git add -A
and git add .
Change it to:
<div style="background-color:black; overflow:hidden;" onmouseover="this.bgColor='white'">
<div style="float:left">hello</div>
<div style="float:right">world</div>
</div>
Basically the outer div only contains floats. Floats are removed from the normal flow. As such the outer div really contains nothing and thus has no height. It really is black but you just can't see it.
The overflow:hidden property basically makes the outer div enclose the floats. The other way to do this is:
<div style="background-color:black" onmouseover="this.bgColor='white'">
<div style="float:left">hello</div>
<div style="float:right">world</div>
<div style="clear:both></div>
</div>
Oh and just for completeness, you should really prefer classes to direct CSS styles.
I have this problem to but my label was in UITableViewCell, and in fund that the easiest way to solve the problem was to create an empty UIView and set the label inside it with constraints to the top and to the left side only, on off curse set the number of lines to 0
enum MyEnum
{ A_ENUM_VALUE=0,
B_ENUM_VALUE,
C_ENUM_VALUE
};
int main()
{
printf("My enum Value : %d\n", (int)C_ENUM_VALUE);
return 0;
}
You have just to cast enum to int !
Output : My enum Value : 2
call EnumProcesses()
and check if the PID is in the list.
http://msdn.microsoft.com/en-us/library/ms682629%28VS.85%29.aspx
Rather than deleting, I think we can nullify the file, because the file will be created if the mail service is still on. Something like following will do the job
cat /dev/null >/var/spool/mail/tomlinuxusr
And yes, sorry for awakening this old thread but I felt I could contribute.
public function updtitle()
{
$data = array(
'table_name' => 'your_table_name_to_update', // pass the real table name
'id' => $this->input->post('id'),
'title' => $this->input->post('title')
);
$this->load->model('Updmodel'); // load the model first
if($this->Updmodel->upddata($data)) // call the method from the model
{
// update successful
}
else
{
// update not successful
}
}
public function upddata($data) {
extract($data);
$this->db->where('emp_no', $id);
$this->db->update($table_name, array('title' => $title));
return true;
}
The active record query is similar to
"update $table_name set title='$title' where emp_no=$id"
From the Android Docs -
From View.OnLongClickListener. This is called when the user either touches and holds the item (when in touch mode), or focuses upon the item with the navigation-keys or trackball and presses and holds the suitable "enter" key or presses and holds down on the trackball (for one second).
From View.OnTouchListener. This is called when the user performs an action qualified as a touch event, including a press, a release, or any movement gesture on the screen (within the bounds of the item).
As for the "moving happens even when I touch" I would set a delta and make sure the View has been moved by at least the delta before kicking in the movement code. If it hasn't been, kick off the touch code.
Here's a an answer how to find country calling code without using third-party libraries (as real developer does):
Get list of all available country codes, Wikipedia can help here: https://en.wikipedia.org/wiki/List_of_country_calling_codes
Parse data in a tree structure where each digit is a branch.
Traverse your tree digit by digit until you are at the last branch - that's your country code.
It looks to me like the UIWebView has a UIScrollView. You can use documented APIs for this, but bouncing is set for both directions, not individually. This is in the API docs. UIScrollView has a bounce property, so something like this works (don't know if there's more than one scrollview):
NSArray *subviews = myWebView.subviews;
NSObject *obj = nil;
int i = 0;
for (; i < subviews.count ; i++)
{
obj = [subviews objectAtIndex:i];
if([[obj class] isSubclassOfClass:[UIScrollView class]] == YES)
{
((UIScrollView*)obj).bounces = NO;
}
}
A temporary table can have 3 kinds, the #
is the most used. This is a temp table that only exists in the current session.
An equivalent of this is @
, a declared table variable. This has a little less "functions" (like indexes etc) and is also only used for the current session.
The ##
is one that is the same as the #
, however, the scope is wider, so you can use it within the same session, within other stored procedures.
You can create a temp table in various ways:
declare @table table (id int)
create table #table (id int)
create table ##table (id int)
select * into #table from xyz
If a method only accesses local variables, it's thread safe. Is that it?
Absolultely not. You can write a program with only a single local variable accessed from a single thread that is nevertheless not threadsafe:
https://stackoverflow.com/a/8883117/88656
Does that apply for static methods as well?
Absolutely not.
One answer, provided by @Cybis, was: "Local variables cannot be shared among threads because each thread gets its own stack."
Absolutely not. The distinguishing characteristic of a local variable is that it is only visible from within the local scope, not that it is allocated on the temporary pool. It is perfectly legal and possible to access the same local variable from two different threads. You can do so by using anonymous methods, lambdas, iterator blocks or async methods.
Is that the case for static methods as well?
Absolutely not.
If a method is passed a reference object, does that break thread safety?
Maybe.
I've done some research, and there is a lot out there about certain cases, but I was hoping to be able to define, by using just a few rules, guidelines to follow to make sure a method is thread safe.
You are going to have to learn to live with disappointment. This is a very difficult subject.
So, I guess my ultimate question is: "Is there a short list of rules that define a thread-safe method?
Nope. As you saw from my example earlier an empty method can be non-thread-safe. You might as well ask "is there a short list of rules that ensures a method is correct". No, there is not. Thread safety is nothing more than an extremely complicated kind of correctness.
Moreover, the fact that you are asking the question indicates your fundamental misunderstanding about thread safety. Thread safety is a global, not a local property of a program. The reason why it is so hard to get right is because you must have a complete knowledge of the threading behaviour of the entire program in order to ensure its safety.
Again, look at my example: every method is trivial. It is the way that the methods interact with each other at a "global" level that makes the program deadlock. You can't look at every method and check it off as "safe" and then expect that the whole program is safe, any more than you can conclude that because your house is made of 100% non-hollow bricks that the house is also non-hollow. The hollowness of a house is a global property of the whole thing, not an aggregate of the properties of its parts.
Most Javascript engines do not optimize tail recursion (this might not be an issue if your JSON isn't deeply nested), but I usually err on the side of caution and do iteration instead, e.g.
function traverse(o, fn) {
const stack = [o]
while (stack.length) {
const obj = stack.shift()
Object.keys(obj).forEach((key) => {
fn(key, obj[key], obj)
if (obj[key] instanceof Object) {
stack.unshift(obj[key])
return
}
})
}
}
const o = {
name: 'Max',
legal: false,
other: {
name: 'Maxwell',
nested: {
legal: true
}
}
}
const fx = (key, value, obj) => console.log(key, value)
traverse(o, fx)
I don't know about Windows (never used it), but on a Linux system you just have to create a build directory (in the top source directory)
mkdir build-dir
go inside it
cd build-dir
then run cmake
and point to the parent directory
cmake ..
and finally run make
make
Notice that make
and cmake
are different programs. cmake
is a Makefile
generator, and the make
utility is governed by a Makefile
textual file. See cmake & make wikipedia pages.
NB: On Windows, cmake
might operate so could need to be used differently. You'll need to read the documentation (like I did for Linux)
This is a bit of a pain on Windows. Here's what I do.
Install latest Sun JDK, e.g. 6u11, in path like c:\install\jdk\sun\6u11
, then let the installer install public JRE in the default place (c:\program files\blah
). This will setup your default JRE for the majority of things.
Install older JDKs as necessary, like 5u18 in c:\install\jdk\sun\5u18
, but don't install the public JREs.
When in development, I have a little batch file that I use to setup a command prompt for each JDK version. Essentially just set JAVA_HOME=c:\jdk\sun\JDK_DESIRED
and then set PATH=%JAVA_HOME%\bin;%PATH%
. This will put the desired JDK first in the path and any secondary tools like Ant or Maven can use the JAVA_HOME
variable.
The path is important because most public JRE installs put a linked executable at c:\WINDOWS\System32\java.exe
, which usually overrides most other settings.
EDIT:
If you're saying that you're changing it from a nested element, you don't need the ID at all. You can do this instead:
$(this).closest('td').toggleClass('change_me some_other_class');
//or
$(this).parents('td:first').toggleClass('change_me some_other_class');
Original answer:
$('#td_id').removeClass('change_me').addClass('some_other_class');
Another option is:
$('#td_id').toggleClass('change_me some_other_class');
A default/non-bare Git repo contains two pieces of state:
The snapshot is what you probably think of as your project: your code files, build files, helper scripts, and anything else you version with Git.
The history is the state that allows you to check out a different commit and get a complete snapshot of what the files in your repository looked like when that commit was added. It consists of a bunch of data structures that are internal to Git that you've probably never interacted with directly. Importantly, the history doesn't just store metadata (e.g. "User U added this many lines to File F at Time T as part of Commit C"), it also stores data (e.g. "User U added these exact lines to File F").
The key idea of a bare repository is that you don't actually need to have the snapshot. Git keeps the snapshot around because it's convenient for humans and other non-Git processes that want to interact with your code, but the snapshot is just duplicating state that's already in the history.
A bare repository is a Git repository that does not have a snapshot. It just stores the history.
Why would you want this? Well, if you're only going to interact with your files using Git (that is, you're not going to edit your files directly or use them to build an executable), you can save space by not keeping around the snapshot. In particular, if you're maintaining a centralized version of your repo on a server somewhere (i.e. you're basically hosting your own GitHub), that server should probably have a bare repo (you would still use a non-bare repo on your local machine though, since you'll presumably want to edit your snapshot).
If you want a more in-depth explanation of bare repos and another example use case, I wrote up a blog post here: https://stegosaurusdormant.com/bare-git-repo/
My answer is a mod of some prior answers from @JoeMills and @user.
Get a cURL
command to log into server:
Modify cURL command to be able to save session cookie after login
-H 'Cookie: <somestuff>'
curl
at beginning -c login_cookie.txt
'login_cookie.txt'
in the same folderCall a new web page using this new cookie that requires you to be logged in
curl -b login_cookie.txt <url_that_requires_log_in>
I have tried this on Ubuntu 20.04 and it works like a charm.
Specifically, I want to mention one situation, by which you may confuse.
What is the difference between "\0" and ""?
The answer is that "\0"
represents in array is {0 0}
and ""
is {0}
.
Because "\0"
is still a string literal and it will also add "\0"
at the end of it. And ""
is empty but also add "\0"
.
Understanding of this will help you understand "\0"
deeply.
m
- for classes that set margin, like this :
mt
- for classes that set margin-top
mb
- for classes that set margin-bottom
ml
- for classes that set margin-left
mr
- for classes that set margin-right
mx
- for classes that set both margin-left
and margin-right
my
- for classes that set both margin-top
and margin-bottom
Where size is one of margin :
0
- for classes that eliminate the margin by setting it to
0, like mt-0
1
- (by default) for classes that set the margin to
$spacer * .25, like mt-1
2
- (by default) for classes that set the margin to
$spacer * .5, like mt-2
3
- (by default) for classes that set the margin to
$spacer, like mt-3
4
- (by default) for classes that set the margin to
$spacer * 1.5, like mt-4
5
- (by default) for classes that set the margin to $spacer * 3, like mt-5
auto
- for classes that set the margin to auto, like mx-auto
The basic purpose of ValidateAntiForgeryToken attribute is to prevent cross-site request forgery attacks.
A cross-site request forgery is an attack in which a harmful script element, malicious command, or code is sent from the browser of a trusted user. For more information on this please visit http://www.asp.net/mvc/overview/security/xsrfcsrf-prevention-in-aspnet-mvc-and-web-pages.
It is simple to use, you need to decorate method with ValidateAntiForgeryToken attribute as below:
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult CreateProduct(Product product)
{
if (ModelState.IsValid)
{
//your logic
}
return View(ModelName);
}
It is derived from System.Web.Mvc namespace.
And in your view, add this code to add the token so it is used to validate the form upon submission.
@Html.AntiForgeryToken()
You probably want the next transformation for you pixels:
pixels = map(list, image.getdata())
If you want to remove all the data from all your tables, you might want to try the command python manage.py flush
. This will delete all of the data in your tables, but the tables themselves will still exist.
See more here: https://docs.djangoproject.com/en/1.8/ref/django-admin/
For Typescript users, the "atom-typescript" package adds a typescript aware symbols view, you can trigger it with Cmd+R, and it works great to jump to methods-
https://atom.io/packages/atom-typescript#alternative-to-symbols-view
If we want the strict type safety and scoped enum, using enum class
is good in C++11.
If we had to work in C++98, we can using the advice given by InitializeSahib
,San
to enable the scoped enum.
If we also want the strict type safety, the follow code can implement somthing like enum
.
#include <iostream>
class Color
{
public:
static Color RED()
{
return Color(0);
}
static Color BLUE()
{
return Color(1);
}
bool operator==(const Color &rhs) const
{
return this->value == rhs.value;
}
bool operator!=(const Color &rhs) const
{
return !(*this == rhs);
}
private:
explicit Color(int value_) : value(value_) {}
int value;
};
int main()
{
Color color = Color::RED();
if (color == Color::RED())
{
std::cout << "red" << std::endl;
}
return 0;
}
The code is modified from the class Month example in book Effective C++ 3rd: Item 18
Use java assist Java library for manipulating the Java bytecode (.class file) of an application.
-> Spring , Hibernate , EJB using this for proxy implementation
-> we can bytecode manipulation to do some program analysis
-> we can use Javassist to implement a transparent cache for method return values, by intercepting all method invocations and only delegating to the super implementation on the first invocation.
GetUserId()
is an extension method on IIdentity
and it is in Microsoft.AspNet.Identity.IdentityExtensions
. Make sure you have added the namespace with using Microsoft.AspNet.Identity;
.
An output stream is generally related to some data destination like a file or a network etc.In java output stream is a destination where data is eventually written and it ends
import java.io.printstream;
class PPrint {
static PPrintStream oout = new PPrintStream();
}
class PPrintStream {
void print(String str) {
System.out.println(str)
}
}
class outputstreamDemo {
public static void main(String args[]) {
System.out.println("hello world");
System.out.prinln("this is output stream demo");
}
}
Based on the official documentation:
dummies = pd.get_dummies(df['Category']).rename(columns=lambda x: 'Category_' + str(x))
df = pd.concat([df, dummies], axis=1)
df = df.drop(['Category'], inplace=True, axis=1)
There is also a nice post in the FastML blog.
I prefer to use something like this:
int? var1 = ds.Tables[0].Rows[0].Field<int?>("ColumnName");
or
int? var1 = ds.Tables[0].Rows[0].Field<int?>(3); //column index
Use sorted()
with a key
as follows -
>>> unsorted_list = [['a','b','c','5','d'],['e','f','g','3','h'],['i','j','k','4','m']]
>>> sorted(unsorted_list, key = lambda x: int(x[3]))
[['e', 'f', 'g', '3', 'h'], ['i', 'j', 'k', '4', 'm'], ['a', 'b', 'c', '5', 'd']]
The lambda
returns the fourth element of each of the inner lists and the sorted
function uses that to sort those list. This assumes that int(elem)
will not fail for the list.
Or use itemgetter
(As Ashwini's comment pointed out, this method would not work if you have string representations of the numbers, since they are bound to fail somewhere for 2+ digit numbers)
>>> from operator import itemgetter
>>> sorted(unsorted_list, key = itemgetter(3))
[['e', 'f', 'g', '3', 'h'], ['i', 'j', 'k', '4', 'm'], ['a', 'b', 'c', '5', 'd']]
As @Marc Claesen mentioned that one of the ways to write cache friendly code is to exploit the structure in which our data is stored. In addition to that another way to write cache friendly code is: change the way our data is stored; then write new code to access the data stored in this new structure.
This makes sense in the case of how database systems linearize the tuples of a table and store them. There are two basic ways to store the tuples of a table i.e. row store and column store. In row store as the name suggests the tuples are stored row wise. Lets suppose a table named Product
being stored has 3 attributes i.e. int32_t key, char name[56]
and int32_t price
, so the total size of a tuple is 64
bytes.
We can simulate a very basic row store query execution in main memory by creating an array of Product
structs with size N, where N is the number of rows in table. Such memory layout is also called array of structs. So the struct for Product can be like:
struct Product
{
int32_t key;
char name[56];
int32_t price'
}
/* create an array of structs */
Product* table = new Product[N];
/* now load this array of structs, from a file etc. */
Similarly we can simulate a very basic column store query execution in main memory by creating an 3 arrays of size N, one array for each attribute of the Product
table. Such memory layout is also called struct of arrays. So the 3 arrays for each attribute of Product can be like:
/* create separate arrays for each attribute */
int32_t* key = new int32_t[N];
char* name = new char[56*N];
int32_t* price = new int32_t[N];
/* now load these arrays, from a file etc. */
Now after loading both the array of structs (Row Layout) and the 3 separate arrays (Column Layout), we have row store and column store on our table Product
present in our memory.
Now we move on to the cache friendly code part. Suppose that the workload on our table is such that we have an aggregation query on the price attribute. Such as
SELECT SUM(price)
FROM PRODUCT
For the row store we can convert the above SQL query into
int sum = 0;
for (int i=0; i<N; i++)
sum = sum + table[i].price;
For the column store we can convert the above SQL query into
int sum = 0;
for (int i=0; i<N; i++)
sum = sum + price[i];
The code for the column store would be faster than the code for the row layout in this query as it requires only a subset of attributes and in column layout we are doing just that i.e. only accessing the price column.
Suppose that the cache line size is 64
bytes.
In the case of row layout when a cache line is read, the price value of only 1(cacheline_size/product_struct_size = 64/64 = 1
) tuple is read, because our struct size of 64 bytes and it fills our whole cache line, so for every tuple a cache miss occurs in case of a row layout.
In the case of column layout when a cache line is read, the price value of 16(cacheline_size/price_int_size = 64/4 = 16
) tuples is read, because 16 contiguous price values stored in memory are brought into the cache, so for every sixteenth tuple a cache miss ocurs in case of column layout.
So the column layout will be faster in the case of given query, and is faster in such aggregation queries on a subset of columns of the table. You can try out such experiment for yourself using the data from TPC-H benchmark, and compare the run times for both the layouts. The wikipedia article on column oriented database systems is also good.
So in database systems, if the query workload is known beforehand, we can store our data in layouts which will suit the queries in workload and access data from these layouts. In the case of above example we created a column layout and changed our code to compute sum so that it became cache friendly.
I tried the answers above but the generated script file was very large and I was having problems while importing the data. I ended up Detaching the database, then copying .mdf to my new machine, then Attaching it to my new version of SQL Server Management Studio.
I found instructions for how to do this on the Microsoft Website:
https://msdn.microsoft.com/en-us/library/ms187858.aspx
NOTE: After Detaching the database I found the .mdf file within this directory:
C:\Program Files\Microsoft SQL Server\
This works for me (using jquery) to overload Ctrl+S, Ctrl+F and Ctrl+G:
$(window).bind('keydown', function(event) {
if (event.ctrlKey || event.metaKey) {
switch (String.fromCharCode(event.which).toLowerCase()) {
case 's':
event.preventDefault();
alert('ctrl-s');
break;
case 'f':
event.preventDefault();
alert('ctrl-f');
break;
case 'g':
event.preventDefault();
alert('ctrl-g');
break;
}
}
});
android.os.NetworkOnMainThreadException is thrown when network operations are performed on the main thread. You better do this in AsyncTask to remove this Exception. Write it this way:
new AsyncTask<Void,String,String>(){
@Override
protected Void doInBackground(Void... params) {
// Perform your network operation.
// Get JSON or XML string from the server.
// Store in a local variable (say response) and return.
return response;
}
protected void onPostExecute(String results){
// Response returned by doInBackGround() will be received
// by onPostExecute(String results).
// Now manipulate your jason/xml String(results).
}
}.execute();
}
MySQL says:
All integer types can have an optional (nonstandard) attribute UNSIGNED. Unsigned type can be used to permit only nonnegative numbers in a column or when you need a larger upper numeric range for the column. For example, if an INT column is UNSIGNED, the size of the column's range is the same but its endpoints shift from -2147483648 and 2147483647 up to 0 and 4294967295.
When do I use it ?
Ask yourself this question: Will this field ever contain a negative value?
If the answer is no, then you want an UNSIGNED
data type.
A common mistake is to use a primary key that is an auto-increment INT
starting at zero, yet the type is SIGNED
, in that case you’ll never touch any of the negative numbers and you are reducing the range of possible id's to half.
Use --build-arg
with each argument.
If you are passing two argument then add --build-arg
with each argument like:
docker build \
-t essearch/ess-elasticsearch:1.7.6 \
--build-arg number_of_shards=5 \
--build-arg number_of_replicas=2 \
--no-cache .
Array.filter is not implemented in many browsers,It is better to define this function if it does not exist.
The source code for Array.prototype is posted in MDN
if (!Array.prototype.filter)
{
Array.prototype.filter = function(fun /*, thisp */)
{
"use strict";
if (this == null)
throw new TypeError();
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun != "function")
throw new TypeError();
var res = [];
var thisp = arguments[1];
for (var i = 0; i < len; i++)
{
if (i in t)
{
var val = t[i]; // in case fun mutates this
if (fun.call(thisp, val, i, t))
res.push(val);
}
}
return res;
};
}
see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter for more details
This works for me (YAML):
spring:
jpa:
properties:
hibernate:
show_sql: true
format_sql: true
logging:
level:
org:
hibernate:
type: trace
With TypeScript generics you can do something like this.
class Person {
constructor (public Name : string, public Age: number) {}
}
var list = new Array<Person>();
list.push(new Person("Baby", 1));
list.push(new Person("Toddler", 2));
list.push(new Person("Teen", 14));
list.push(new Person("Adult", 25));
var oldest_person = list.reduce( (a, b) => a.Age > b.Age ? a : b );
alert(oldest_person.Name);
Basic Structure Here is an example of a JUnit output file, showing a skip and failed result, as well as a single passed result.
<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
<testsuite name="JUnitXmlReporter" errors="0" tests="0" failures="0" time="0" timestamp="2013-05-24T10:23:58" />
<testsuite name="JUnitXmlReporter.constructor" errors="0" skipped="1" tests="3" failures="1" time="0.006" timestamp="2013-05-24T10:23:58">
<properties>
<property name="java.vendor" value="Sun Microsystems Inc." />
<property name="compiler.debug" value="on" />
<property name="project.jdk.classpath" value="jdk.classpath.1.6" />
</properties>
<testcase classname="JUnitXmlReporter.constructor" name="should default path to an empty string" time="0.006">
<failure message="test failure">Assertion failed</failure>
</testcase>
<testcase classname="JUnitXmlReporter.constructor" name="should default consolidate to true" time="0">
<skipped />
</testcase>
<testcase classname="JUnitXmlReporter.constructor" name="should default useDotNotation to true" time="0" />
</testsuite>
</testsuites>
Below is the documented structure of a typical JUnit XML report. Notice that a report can contain 1 or more test suite. Each test suite has a set of properties (recording environment information). Each test suite also contains 1 or more test case and each test case will either contain a skipped, failure or error node if the test did not pass. If the test case has passed, then it will not contain any nodes. For more details of which attributes are valid for each node please consult the following section "Schema".
<testsuites> => the aggregated result of all junit testfiles
<testsuite> => the output from a single TestSuite
<properties> => the defined properties at test execution
<property> => name/value pair for a single property
...
</properties>
<error></error> => optional information, in place of a test case - normally if the tests in the suite could not be found etc.
<testcase> => the results from executing a test method
<system-out> => data written to System.out during the test run
<system-err> => data written to System.err during the test run
<skipped/> => test was skipped
<failure> => test failed
<error> => test encountered an error
</testcase>
...
</testsuite>
...
</testsuites>
Another way, not yet mentioned here is the initialisation of parameters in infinite while-loops. Below is not the cleanest example, but it serves it's purpose.
#!/usr/bin/env bash
[ "$1" ] && foo=0 && bar="baz"
while : "${foo=2}" "${bar:=qux}"; do
echo "$foo"
(( foo == 3 )) && echo "$bar" && break
(( foo=foo+1 ))
done
Material please go through this Link And also try this
ArrayList<Class> myArray= new ArrayList<Class>();
With pure javascript:
var buttons = document.getElementsByTagName("button");
var buttonsCount = buttons.length;
for (var i = 0; i <= buttonsCount; i += 1) {
buttons[i].onclick = function(e) {
alert(this.id);
};
}?
The overall dimensions of a range are in its Width
and Height
properties.
Dim r As Range
Set r = ActiveSheet.Range("A4:H12")
Debug.Print r.Width
Debug.Print r.Height
What's perplexing to me is that the visual studio designer only allows you to use BackgroundWorkers and Timers that don't actually work with the service project.
It gives you neat drag and drop controls onto your service but... don't even try deploying it. Won't work.
Services: Only use System.Timers.Timer System.Windows.Forms.Timer won't work even though it's available in the toolbox
Services: BackgroundWorkers will not work when it's running as a service Use System.Threading.ThreadPools instead or Async calls
The Qt documentations has an Image Viewer example which demonstrates handling resizing images inside a QLabel
. The basic idea is to use QScrollArea
as a container for the QLabel
and if needed use label.setScaledContents(bool)
and scrollarea.setWidgetResizable(bool)
to fill available space and/or ensure QLabel inside is resizable.
Additionally, to resize QLabel while honoring aspect ratio use:
label.setPixmap(pixmap.scaled(width, height, Qt::KeepAspectRatio, Qt::FastTransformation));
The width
and height
can be set based on scrollarea.width()
and scrollarea.height()
.
In this way there is no need to subclass QLabel.
pixVals = list(pilImg.getdata())
output is a list of all RGB values from the picture:
[(248, 246, 247), (246, 248, 247), (244, 248, 247), (244, 248, 247), (246, 248, 247), (248, 246, 247), (250, 246, 247), (251, 245, 247), (253, 244, 247), (254, 243, 247)]
You need the whole python package, with a setup.py
file in it.
A package named foo
would be:
foo # the installable package
+-- foo
¦ +-- __init__.py
¦ +-- bar.py
+-- setup.py
And install from github like:
$ pip install git+ssh://[email protected]/myuser/foo.git
or
$ pip install git+https://github.com/myuser/foo.git@v123
or
$ pip install git+https://github.com/myuser/foo.git@newbranch
More info at https://pip.pypa.io/en/stable/reference/pip_install/#vcs-support
This will do it assuming you want this to happen each time you open the command line:
echo cd ../../../d/work_space_for_my_company/project/code_source >> ~/.bashrc
Now when you open the shell it will move up three directories from home and change to code_source.
This code simply appends the line "cd ../../../d/work_space_for_my_company/project/code_source" to a file named ".bashrc". The ">>" creates a file if it does not exist and then appends. The .bashrc file is useful for running commands at start-up/log-in time (i.e. loading modules etc.)
String1.scan(/<([^>]*)>/).last.first
scan
creates an array which, for each <item>
in String1
contains the text between the <
and the >
in a one-element array (because when used with a regex containing capturing groups, scan creates an array containing the captures for each match). last
gives you the last of those arrays and first
then gives you the string in it.
All you need is to set values first to your RadioButton, for example:
RadioButton radioButton = (RadioButton)findViewById(R.id.radioButton);
radioButton.setId(1); //some int value
and then whenever this spacific radioButton will be chosen you can pull its value by the Id you gave it with
RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radioGroup);
int whichIndex = radioGroup.getCheckedRadioButtonId(); //of course the radioButton
//should be inside the "radioGroup"
//in the XML
Cheers!
Add this to AppServiceProvider.php
use Illuminate\Support\Facades\Schema;
public function boot() {
Schema::defaultStringLength(191);
}
In Mac there is a fast method with brew:
brew search node
You see some version, for example: node@10 node@12 ... Then
brew unlink node
And now select a before version for example node@12
brew link --overwrite --force node@12
Ready, you have downgraded you node version.
With this method you can set font size, font style and Header background also. there are have 2 method for this
First Method
- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section{
UITableViewHeaderFooterView *header = (UITableViewHeaderFooterView *)view;
header.backgroundView.backgroundColor = [UIColor darkGrayColor];
header.textLabel.font=[UIFont fontWithName:@"Open Sans-Regular" size:12];
[header.textLabel setTextColor:[UIColor whiteColor]];
}
Second Method
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 30)];
// myLabel.frame = CGRectMake(20, 8, 320, 20);
myLabel.font = [UIFont fontWithName:@"Open Sans-Regular" size:12];
myLabel.text = [NSString stringWithFormat:@" %@",[self tableView:FilterSearchTable titleForHeaderInSection:section]];
myLabel.backgroundColor=[UIColor blueColor];
myLabel.textColor=[UIColor whiteColor];
UIView *headerView = [[UIView alloc] init];
[headerView addSubview:myLabel];
return headerView;
}
I reworked Doug Glancy's solution to avoid rows deletion, which can lead to #Ref issue in formulae.
Sub ListReset(lst As ListObject)
'clears a listObject while leaving row 1 empty, with formulae
With lst
If .ShowAutoFilter Then .AutoFilter.ShowAllData
On Error Resume Next
With .DataBodyRange
.Offset(1).Rows.Clear
.Rows(1).SpecialCells(xlCellTypeConstants).ClearContents
End With
On Error GoTo 0
.Resize .Range.Rows("1:2")
End With
End Sub
I've been using this amazing nuget that does dynamic annotations ExpressiveAnnotations
You could validate any logic you can dream of:
public string Email { get; set; }
public string Phone { get; set; }
[RequiredIf("Email != null")]
[RequiredIf("Phone != null")]
[AssertThat("AgreeToContact == true")]
public bool? AgreeToContact { get; set; }
found a paper at: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1924044 that suggests a formula to calculate the downloads:
d_iPad=13,516*rank^(-0.903)
d_iPhone=52,958*rank^(-0.944)
If you are using intellij go to Run > Edit Configurations
menu setting. A dialog box will appear. Now you can add arguments to the Program arguments
input field.
here is the one working fine:
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *
app = QApplication(sys.argv)
web = QWebView()
web.load(QUrl("http://www.yahoo.com"))
printer = QPrinter()
printer.setPageSize(QPrinter.A4)
printer.setOutputFormat(QPrinter.PdfFormat)
printer.setOutputFileName("fileOK.pdf")
def convertIt():
web.print_(printer)
print("Pdf generated")
QApplication.exit()
QObject.connect(web, SIGNAL("loadFinished(bool)"), convertIt)
sys.exit(app.exec_())
This happens when a python extension (written in C) tries to access a memory beyond reach.
You can trace it in following ways.
sys.settrace
at the very first line of the code.Use gdb
as described by Mark in this answer.. At the command prompt
gdb python
(gdb) run /path/to/script.py
## wait for segfault ##
(gdb) backtrace
## stack trace of the c code
At the extreme ranges, an unsigned int can become larger than an int.
Therefore, the compiler generates a warning. If you are sure that this is not a problem, feel free to cast the types to the same type so the warning disappears (use C++ cast so that they are easy to spot).
Alternatively, make the variables the same type to stop the compiler from complaining.
I mean, is it possible to have a negative padding? If so then keep it as an int. Otherwise you should probably use unsigned int and let the stream catch the situations where the user types in a negative number.
check
System.getProperty("sun.jnu.encoding")
it seems to be the same encoding as the one used in your system's command line.
run "eclipse -clean -refresh" from command line. This fixed the issue for me when all other solutions failed.
int *arr1[5]
In this declaration, arr1
is an array of 5 pointers to integers.
Reason: Square brackets have higher precedence over * (dereferncing operator).
And in this type, number of rows are fixed (5 here), but number of columns is variable.
int (*arr2)[5]
In this declaration, arr2
is a pointer to an integer array of 5 elements.
Reason: Here, () brackets have higher precedence than [].
And in this type, number of rows is variable, but the number of columns is fixed (5 here).
You could retrieve the body text of the whole page like this:
bodyText = self.driver.find_element_by_tag_name('body').text
then use an assert to check it like this:
self.assertTrue("the text you want to check for" in bodyText)
Of course, you can be specific and retrieve a specific DOM element's text and then check that instead of retrieving the whole page.
Where $GIT_DIR is the path to the folder to be searched (the git repo path), execute the following in terminal.
find $GIT_DIR -name *.git* -ok rm -Rf {} \;
This will recursively search for any directories or files containing ".git" in the file/directory name within the specified Git directory. This will include .git/ and .gitignore files and any other .git-like assets. The command is interactive and will ask before removing. To proceed with the deletion, simply enter y, then Enter.
You can also use html to override the css locally. I was having a similar issue and this worked for me:
<html>
<body>
<h4>A nested List:</h4>
<ul style="PADDING-LEFT: 12px">
<li>Coffee</li>
<li>Tea
<ul>
<li>Black tea</li>
<li>Green tea</li>
</ul>
</li>
<li>Milk</li>
</ul>
</body>
</html>
You need to add the PHP directory to your path. On the command line (e.g. in a batch file), it would look like this:
SET PATH=%PATH%;C:\your\wamp\path\php
if in doubt, it's the directory containing the php.exe
.
You can also pre-set the path in Windows' control panel. See here on how to do this in Windows 7 for example.
Be aware that if you call the PHP executable from an arbitrary directory, that directory will be the working directory. You may need to adjust your scripts so they use the proper directories for their file operations (if there are any).
Better yet - just HTML:
<a [routerLink]="[]" [queryParams]="{key: 'value'}">Your Query Params Link</a>
Note the empty array instead of just doing routerLink=""
or [routerLink]="''"
Before proceeding with this post, it is important to understand the difference between NaN and None. One is a float type, the other is an object type. Pandas is better suited to working with scalar types as many methods on these types can be vectorised. Pandas does try to handle None and NaN consistently, but NumPy cannot.
My suggestion (and Andy's) is to stick with NaN.
But to answer your question...
na_values=['-']
argument with read_csv
If you loaded this data from CSV/Excel, I have good news for you. You can quash this at the root during data loading instead of having to write a fix with code as a subsequent step.
Most of the pd.read_*
functions (such as read_csv
and read_excel
) accept a na_values
attribute.
file.csv
A,B
-,1
3,-
2,-
5,3
1,-2
-5,4
-1,-1
-,0
9,0
Now, to convert the -
characters into NaNs, do,
import pandas as pd
df = pd.read_csv('file.csv', na_values=['-'])
df
A B
0 NaN 1.0
1 3.0 NaN
2 2.0 NaN
3 5.0 3.0
4 1.0 -2.0
5 -5.0 4.0
6 -1.0 -1.0
7 NaN 0.0
8 9.0 0.0
And similar for other functions/file formats.
P.S.: On v0.24+, you can preserve integer type even if your column has NaNs (yes, talk about having the cake and eating it too). You can specify dtype='Int32'
df = pd.read_csv('file.csv', na_values=['-'], dtype='Int32')
df
A B
0 NaN 1
1 3 NaN
2 2 NaN
3 5 3
4 1 -2
5 -5 4
6 -1 -1
7 NaN 0
8 9 0
df.dtypes
A Int32
B Int32
dtype: object
The dtype is not a conventional int type... but rather, a Nullable Integer Type. There are other options.
pd.to_numeric
with errors='coerce
If you're dealing with numeric data, a faster solution is to use pd.to_numeric
with the errors='coerce'
argument, which coerces invalid values (values that cannot be cast to numeric) to NaN.
pd.to_numeric(df['A'], errors='coerce')
0 NaN
1 3.0
2 2.0
3 5.0
4 1.0
5 -5.0
6 -1.0
7 NaN
8 9.0
Name: A, dtype: float64
To retain (nullable) integer dtype, use
pd.to_numeric(df['A'], errors='coerce').astype('Int32')
0 NaN
1 3
2 2
3 5
4 1
5 -5
6 -1
7 NaN
8 9
Name: A, dtype: Int32
To coerce multiple columns, use apply
:
df[['A', 'B']].apply(pd.to_numeric, errors='coerce').astype('Int32')
A B
0 NaN 1
1 3 NaN
2 2 NaN
3 5 3
4 1 -2
5 -5 4
6 -1 -1
7 NaN 0
8 9 0
...and assign the result back after.
More information can be found in this answer.
Reason of the error: Package name left blank while creating a class. This make use of default package. Thus causes this error.
Quick fix:
helloWorld
inside the src
folder.helloWorld.java
file in that package. Just drag and drop on
the package. Error should disappear.Explanation:
Latest version of Eclipse required java11 or above. The module
feature is introduced in java9 and onward. It was proposed in 2005 for Java7 but later suspended. Java is object oriented based. And module is the moduler approach which can be seen in language like C. It was harder to implement it, due to which it took long time for the release. Source: Understanding Java 9 Modules
When you create a new project in Eclipse then by default module feature is selected. And in Eclipse-2020-09-R, a pop-up appears which ask for creation of module-info.java
file. If you select don't create
then module-info.java
will not create and your project will free from this issue.
Best practice is while crating project, after giving project name. Click on next
button instead of finish
. On next page at the bottom it ask for creation of module-info.java
file. Select or deselect as per need.
If selected: (by default) click on finish
button and give name for module. Now while creating a class don't forget to give package name. Whenever you create a class just give package name. Any name, just don't left it blank.
If deselect: No issue
The line #!/bin/bash/python3
or #!/bin/bash/python
specifies which python compiler to use. You might have multiple python versions installed. For example,
a.py :
#!/bin/bash/python3
print("Hello World")
is a python3 script, and
b.py :
#!/bin/bash/python
print "Hello World"
is a python 2.x script
In order to run this file ./a.py
or ./b.py
is used, you need to give the files execution privileges before hand, otherwise executing will lead to Permission denied
error.
For giving execution permission,
chmod +x a.py
This will do it if you only want the first "B" value, you can sub a cell address for "B" if you want to make it more generic.
=INDEX(A2:A6,SUMPRODUCT(MATCH(TRUE,(B2:B6)="B",0)),1)
To use this based on two columns, just concatenate inside the match:
=INDEX(A2:A6,SUMPRODUCT(MATCH(TRUE,(A2:A6&B2:B6)=("3"&"B"),0)),1)
@Alan's answer will do what you're looking for, but this solution fails when you use the responsive capabilities of Bootstrap. In your case, you're using the xs
sizes so you won't notice, but if you used anything else (e.g. col-sm
, col-md
, etc), you'd understand.
Another approach is to play with margins and padding. See the updated fiddle: http://jsfiddle.net/jz8j247x/1/
.left-side {
background-color: blue;
padding-bottom: 1000px;
margin-bottom: -1000px;
height: 100%;
}
.something {
height: 100%;
background-color: red;
padding-bottom: 1000px;
margin-bottom: -1000px;
height: 100%;
}
.row {
background-color: green;
overflow: hidden;
}
No, #region does not exist in the T-SQL language.
You can get code-folding using begin-end blocks:
-- my region begin -- code goes here end
I'm not sure I'd recommend using them for this unless the code cannot be acceptably refactored by other means though!
SELECT last_value, increment_by from "other_schema".id_seq;
for adding a seq to a column where the schema is not public try this.
nextval('"other_schema".id_seq'::regclass)
Just another example to add BigDecimals
. Key point is that they are immutable and they can be initialized only in the constructor. Here is the code:
import java.util.*;
import java.math.*;
public class Main {
public static void main(String[] args) {
Scanner sc;
boolean first_right_number = false;
BigDecimal initBigDecimal = BigDecimal.ZERO;
BigDecimal add1 = BigDecimal.ZERO;
BigDecimal add2 = BigDecimal.ZERO;
while (!first_right_number)
{
System.out.print("Enter a first single numeric value: ");
sc = new Scanner(System.in);
if (sc.hasNextBigDecimal())
{
first_right_number = true;
add1 = sc.nextBigDecimal();
}
}
boolean second_right_number = false;
while (!second_right_number)
{
System.out.print("Enter a second single numeric value: ");
sc = new Scanner(System.in);
if (sc.hasNextBigDecimal())
{
second_right_number = true;
add2 = sc.nextBigDecimal();
}
}
BigDecimal result = initBigDecimal.add(add1).add(add2);
System.out.println("Sum of the 2 numbers is: " + result.toString());
}
}
-w
(warnings) flag