if (dtCustomers.Columns[j - 1].DataType != typeof(decimal) && dtCustomers.Columns[j - 1].DataType != typeof(int))
{
myWorksheet.Cells[i + 2, j].NumberFormat = "@";
}
To add previous iOS simulator to Xcode 4.2, you need old xcode_3.2.6_and_ios_sdk_4.3.dmg (or similar version) installer file and do as following:
Now there are a list of your installed simulator.
Java doesn't natively allow building of an exe, that would defeat its purpose of being cross-platform.
AFAIK, these are your options:
Make a runnable JAR. If the system supports it and is configured appropriately, in a GUI, double clicking the JAR will launch the app. Another option would be to write a launcher shell script/batch file which will start your JAR with the appropriate parameters
There also executable wrappers - see How can I convert my Java program to an .exe file?
You have to know if the problem come from the listener or from the database.
So first, restart the listener, it could solve the problem.
Second, it could come from the db if it's not in open mode (nomount, mount, restrict). To check it, connect locally and do the following query:
sqlplus /nolog
connect / as sysdba
SQL> select instance_name, status, database_status from v$instance;
You can try the following VBA code to export Macro contents directly without converting them to VBA first. Unlike Tables, Forms, Reports, and Modules, the Macros are in a container called Scripts. But they are there and can be exported and imported using SaveAsText and LoadFromText
Option Compare Database
Option Explicit
Public Sub ExportDatabaseObjects()
On Error GoTo Err_ExportDatabaseObjects
Dim db As Database
Dim d As Document
Dim c As Container
Dim sExportLocation As String
Set db = CurrentDb()
sExportLocation = "C:\SomeFolder\"
Set c = db.Containers("Scripts")
For Each d In c.Documents
Application.SaveAsText acMacro, d.Name, sExportLocation & "Macro_" & d.Name & ".txt"
Next d
An alternative object to use is as follows:
For Each obj In Access.Application.CurrentProject.AllMacros
Access.Application.SaveAsText acMacro, obj.Name, strFilePath & "\Macro_" & obj.Name & ".txt"
Next
You would also want to use refs on the element instead of using document.getElementById
, it's just a slightly more robust thing.
use array.splice
/*array.splice(index , howMany[, element1[, ...[, elementN]]])
array.splice(index) // SpiderMonkey/Firefox extension*/
array.splice(1,1)
Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
Meanwhile you can use the isSameOrAfter
method:
moment('2010-10-20').isSameOrAfter('2010-10-20', 'day');
It worked for me:
window.location = $('#myanchor').attr('href');
To use the default android drawable resource, no need copy anything.. you can just import it first with..
import android.R;
but i will make your own resources will have an error if you want to use it. The error will be something like:
R. cannot be resolved
So, I prefer not to import android.R
but import *my.own.package*.R;
then when I can normally use my own resource with R.drawable.*something*
without error,
and put android.R.*something_default*
to use the default android resources.
Nesting a stackpanel will cause the textbox to wrap properly:
<Viewbox Margin="120,0,120,0">
<StackPanel Orientation="Vertical" Width="400">
<TextBlock x:Name="subHeaderText"
FontSize="20"
TextWrapping="Wrap"
Foreground="Black"
Text="Lorem ipsum dolor, lorem isum dolor,Lorem ipsum dolor sit amet, lorem ipsum dolor sit amet " />
</StackPanel>
</Viewbox>
If you have Model or transfer object passed to GET method but still have this error, check naming of your variables. Use entity/transfer object names in camelcase. I had BusinessTripDTO object and named it 'trip' for short. It caused this error to occure, even I had all other parts in place. Renaming varaibles to businessTripDTO in Java and Thymeleaf solved this problem for me.
I had a git submodule problem when getting this error. Try running gradle tasks --info
for a more detailed problem description. I first used gradle tasks --debug
, which was not nearly as helpful as --info
.
I have two button for form submission, button named save and exit bypasses the validation :
$('.save_exist').on('click', function (event) {
$('#MyformID').removeData('validator');
$('.form-control').removeClass('error');
$('.form-control').removeClass('required');
$("#loanApplication").validate().cancelSubmit = true;
$('#loanApplication').submit();
event.preventDefault();
});
http://en.wikipedia.org/wiki/Division_by_zero
http://en.wikipedia.org/wiki/Unix_signal#SIGFPE
This should give you a really good idea. Since a modulus is, in its basic sense, division with a remainder, something % 0
IS division by zero and as such, will trigger a SIGFPE being thrown.
Arrays can't be passed as function parameters by value in C.
You can put the array in a struct:
typedef struct type24 {
char byte[3];
} type24;
and then pass that by value, but of course then it's less convenient to use: x.byte[0]
instead of x[0]
.
Your function type24_to_int32(char value[3])
actually passes by pointer, not by value. It's exactly equivalent to type24_to_int32(char *value)
, and the 3
is ignored.
If you're happy passing by pointer, you could stick with the array and do:
type24_to_int32(const type24 *value);
This will pass a pointer-to-array, not pointer-to-first-element, so you use it as:
(*value)[0]
I'm not sure that's really a gain, since if you accidentally write value[1]
then something stupid happens.
All you need to do is to find a folder called "flutter" (lowecase), which is located inside a folder called "Flutter" (uppercase), select it, and browse it.
In my case it is located at:
C:\Users\Administrator\Flutter\flutter_windows_v1.12.13+hotfix.5-stable\flutter
Also make sure that your Flutter and Dart are of the latest version. If they are not, upgrade them and re-start the IDE.
Try the Offstage
widget
if attribute offstage:true
the not occupy the physical space and invisible,
if attribute offstage:false
it will occupy the physical space and visible
Offstage(
offstage: true,
child: Text("Visible"),
),
Your code should look like below
let image = UIImage(named: "name") as UIImage?
let button = UIButton(type: UIButtonType.Custom) as UIButton
button.frame = CGRectMake(100, 100, 100, 100)
button.setImage(image, forState: .Normal)
button.addTarget(self, action: "btnTouched:", forControlEvents:.TouchUpInside)
self.view.addSubview(button)
In case anyone's interested in the Method syntax, if you have a navigation property, it's way easy:
db.Services.Where(s=>s.ServiceAssignment.LocationId == 1);
If you don't, unless there's some Join()
override I'm unaware of, I think it looks pretty gnarly (and I'm a Method syntax purist):
db.Services.Join(db.ServiceAssignments,
s => s.Id,
sa => sa.ServiceId,
(s, sa) => new {service = s, asgnmt = sa})
.Where(ssa => ssa.asgnmt.LocationId == 1)
.Select(ssa => ssa.service);
You need to ensure that any code that modifies the HTTP headers is executed before the headers are sent. This includes statements like session_start()
. The headers will be sent automatically when any HTML is output.
Your problem here is that you're sending the HTML ouput at the top of your page before you've executed any PHP at all.
Move the session_start()
to the top of your document :
<?php session_start(); ?> <html> <head> <title>PHP SDK</title> </head> <body> <?php require_once 'src/facebook.php'; // more PHP code here.
You have to use a negative lookahead assertion.
(?!^ABC$)
You could for example use the following.
(?!^ABC$)(^.*$)
If this does not work in your editor, try this. It is tested to work in ruby and javascript:
^((?!ABC).)*$
Zero-size array passed to numpy.mean
raises this warning (as indicated in several comments).
For some other candidates:
median
also raises this warning on zero-sized array.other candidates do not raise this warning:
min,argmin
both raise ValueError
on empty arrayrandn
takes *arg
; using randn(*[])
returns a single random numberstd,var
return nan
on an empty arrayNew Font-Awesome v5 has Power Transforms
You can rotate any icon by adding attribute data-fa-transform
to icon
<i class="fas fa-magic" data-fa-transform="rotate-45"></i>
Here is a fiddle
For more information, check this out : Font-Awesome5 Power Tranforms
Nothing work for me but when i set tint color it works on Shape Drawable
Drawable background = imageView.getBackground();
background.setTint(getRandomColor())
require android 5.0 API 21
If you need just quick dump and don't want to implement custom encoder. You can use the following:
json_string = json.dumps(data, iterable_as_array=True)
This will convert all sets (and other iterables) into arrays. Just beware that those fields will stay arrays when you parse the json back. If you want to preserve the types, you need to write custom encoder.
If you want to automate the creating of a custom divergent colormap commonly used for surface plots, this module combined with @unutbu method worked well for me.
def diverge_map(high=(0.565, 0.392, 0.173), low=(0.094, 0.310, 0.635)):
'''
low and high are colors that will be used for the two
ends of the spectrum. they can be either color strings
or rgb color tuples
'''
c = mcolors.ColorConverter().to_rgb
if isinstance(low, basestring): low = c(low)
if isinstance(high, basestring): high = c(high)
return make_colormap([low, c('white'), 0.5, c('white'), high])
The high and low values can be either string color names or rgb tuples. This is the result using the surface plot demo:
I compiled and run my code. This is accurate code. You can try it your own.
data = pd.read_excel('file.xlsx')
If you have any special character or space in column name you can write it in ''
like in the given code:
data = data[data['expire/t'].notnull()]
print (date)
If there is just a single string column name without any space or special character you can directly access it.
data = data[data.expire ! = 0]
print (date)
I know the OP was very old, at that time in-app-update was not available. But from API 21, you can use in-app-update checking. You may need to keep your eyes on some points which are nicely written up here:
timedeltas have a days
and seconds
attribute .. you can convert them yourself with ease.
git rev-parse --show-toplevel
could be enough if executed within a git repo.
From git rev-parse
man page:
--show-toplevel
Show the absolute path of the top-level directory.
For older versions (before 1.7.x), the other options are listed in "Is there a way to get the git root directory in one command?":
git rev-parse --git-dir
That would give the path of the .git
directory.
The OP mentions:
git rev-parse --show-prefix
which returns the local path under the git repo root. (empty if you are at the git repo root)
Note: for simply checking if one is in a git repo, I find the following command quite expressive:
git rev-parse --is-inside-work-tree
And yes, if you need to check if you are in a .git
git-dir folder:
git rev-parse --is-inside-git-dir
Microsoft Msdn article The Forgotten Controls: HTML Server Controls explains use of runat="server" with an example on text box <input type="text">
by converting it to <input type="text" id="Textbox1" runat="server">
Doing this will give you programmatic access to the HTML element on the server before the Web page is created and sent down to the client. The HTML element must contain an id attribute. This attribute serves as an identity for the element and enables you to program to elements by their specific IDs. In addition to this attribute, the HTML element must contain runat="server". This tells the processing server that the tag is processed on the server and is not to be considered a traditional HTML element.
In short, to enable programmatic access to the HTML element add runat="server"
to it.
Whatever goes to softmax
is logit, this is what J. Hinton repeats in coursera videos all the time.
Here's the correct way of doing it:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
Uri imageUri = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
}
}
If you need to load very large images, the following code will load it in in tiles (avoiding large memory allocations):
BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance(myStream, false);
Bitmap region = decoder.decodeRegion(new Rect(10, 10, 50, 50), null);
See the answer here
Is there a reason you didn't just use this?
<select id="animal" name="animal">
<option value="0">--Select Animal--</option>
<option value="Cat">Cat</option>
<option value="Dog">Dog</option>
<option value="Cow">Cow</option>
</select>
if($_POST['submit'] && $_POST['submit'] != 0)
{
$animal=$_POST['animal'];
}
They are used for different things. The alt
attribute is used instead of the image. If the image can't be shown, and in screen readers.
The title
attribute is shown along with the image, typically as a hover tooltip.
One should not be used "instead" of the other. Each should be used properly, to do the things they were designed to do.
They are access modifiers and help us implement Encapsulation (or information hiding). They tell the compiler which other classes should have access to the field or method being defined.
private
- Only the current class will have access to the field or method.
protected
- Only the current class and subclasses (and sometimes also same-package classes) of this class will have access to the field or method.
public
- Any class can refer to the field or call the method.
This assumes these keywords are used as part of a field or method declaration within a class definition.
Zimi's answer describes this process generally. Here are the specifics:
Create and switch to a new branch. Make sure the new branch is based on master
so it will include the recent hotfixes.
git checkout master
git branch feature1_new
git checkout feature1_new
# Or, combined into one command:
git checkout -b feature1_new master
After switching to the new branch, merge the changes from your existing feature branch. This will add your commits without duplicating the hotfix commits.
git merge feature1
On the new branch, resolve any conflicts between your feature and the master branch.
Done! Now use the new branch to continue to develop your feature.
You need to use IFS
instead of -d
:
while IFS=, read -r col1 col2
do
echo "I got:$col1|$col2"
done < myfile.csv
Note that for general purpose CSV parsing you should use a specialized tool which can handle quoted fields with internal commas, among other issues that Bash can't handle by itself. Examples of such tools are cvstool
and csvkit
.
If you are using remote interpreter you have to also check if its executable PATH is defined. In my case switching from remote Docker interpreter to local interpreter solved the problem.
Here is new may to authenticate from "admin" and then switch to your desired DB for further operations:
var MongoClient = require('mongodb').MongoClient;
var Db = require('mongodb').Db, Server = require('mongodb').Server ,
assert = require('assert');
var user = 'user';
var password = 'password';
MongoClient.connect('mongodb://'+user+':'+password+'@localhost:27017/opsdb',{native_parser:true, authSource:'admin'}, function(err,db){
if(err){
console.log("Auth Failed");
return;
}
console.log("Connected");
db.collection("cols").find({loc:{ $eq: null } }, function(err, docs) {
docs.each(function(err, doc) {
if(doc) {
console.log(doc['_id']);
}
});
});
db.close();
});
Try
find . -type d
or
find . -type d -ls
None of the answers worked for me. However, I simply did sudo mysql.server start
and it worked nicely.
Also, for me, it did NOT show permissions issue in *.err file.
Look at the types of those properties:
In [1]: import datetime
In [2]: d = datetime.date.today()
In [3]: type(d.month)
Out[3]: <type 'int'>
In [4]: type(d.day)
Out[4]: <type 'int'>
Both are integers. So there is no automatic way to do what you want. So in the narrow sense, the answer to your question is no.
If you want leading zeroes, you'll have to format them one way or another. For that you have several options:
In [5]: '{:02d}'.format(d.month)
Out[5]: '03'
In [6]: '%02d' % d.month
Out[6]: '03'
In [7]: d.strftime('%m')
Out[7]: '03'
In [8]: f'{d.month:02d}'
Out[8]: '03'
It is at the same location: ~/.android/debug.keystore
The error occurs when trying to run mongo.exe WITHOUT having executed mongod.exe. The following batch script solved the problem:
@echo off
cd C:\mongodb\bin\
start mongod.exe
start mongo.exe
exit
You mean menu Project -> Generate Javadoc ?
This confused me for a while until I worked out that the dependencies of the various projects in the solution had been messed up. Get that straight and naturally your assembly appears in the right place.
while installing python packages in a global environment is doable, it is a best practice to isolate the environment between projects (creating virtual environments). Otherwise, confusion between Python versions will arise, just like your problem.
The simplest method is to use venv
library in the project directory:
python3 -m venv venv
Where the first venv
is to call the venv
package, and the second venv
defines the virtual environment directory name.
Then activate the virtual environment:
source venv/bin/activate
Once the virtual environment has been activated, your pip install ...
commands would not be interfered with any other Python version or pip version anymore.
For installing requests
:
pip install requests
Another benefit of the virtual environment is to have a concise list of libraries needed for that specific project.
*note: commands only work on Linux and Mac OS
I think your code is trying to "divide by zero" or "divide by NaN". If you are aware of that and don't want it to bother you, then you can try:
import numpy as np
np.seterr(divide='ignore', invalid='ignore')
For more details see:
Using 400
status codes for any other purpose than indicating that the request is malformed is just plain wrong.
If the request payload contains a byte-sequence that could not be parsed as application/json
(if the server expects that dataformat), the appropriate status code is 415
:
The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method.
If the request payload is syntactically correct but semantically incorrect, the non-standard 422
response code may be used, or the standard 403
status code:
The server understood the request, but is refusing to fulfill it. Authorization will not help and the request SHOULD NOT be repeated.
This will give you duplicate rows:
vocabulary[duplicated(vocabulary$id),]
This will give you the number of duplicates:
dim(vocabulary[duplicated(vocabulary$id),])[1]
Example:
vocabulary2 <-rbind(vocabulary,vocabulary[1,]) #creates a duplicate at the end
vocabulary2[duplicated(vocabulary2$id),]
# id year sex education vocabulary
#21639 20040001 2004 Female 9 3
dim(vocabulary2[duplicated(vocabulary2$id),])[1]
#[1] 1 #=1 duplicate
OK, with the additional information, here's what you should do: duplicated
has a fromLast
option which allows you to get duplicates from the end. If you combine this with the normal duplicated
, you get all duplicates. The following example adds duplicates to the original vocabulary object (line 1 is duplicated twice and line 5 is duplicated once). I then use table
to get the total number of duplicates per ID.
#Create vocabulary object with duplicates
voc.dups <-rbind(vocabulary,vocabulary[1,],vocabulary[1,],vocabulary[5,])
#List duplicates
dups <-voc.dups[duplicated(voc.dups$id)|duplicated(voc.dups$id, fromLast=TRUE),]
dups
# id year sex education vocabulary
#1 20040001 2004 Female 9 3
#5 20040008 2004 Male 14 1
#21639 20040001 2004 Female 9 3
#21640 20040001 2004 Female 9 3
#51000 20040008 2004 Male 14 1
#Count duplicates by id
table(dups$id)
#20040001 20040008
# 3 2
Note: This solution only works for Mac and *nix users.
I also tried to find Jad with no luck. My quick solution was to download MacJad that contains jad. Once you downloaded it you can find jad in [where-you-downloaded-macjad]/MacJAD/Contents/Resources/jad.
You can capture the image from windows using the Python web driver. Use the code below which page need to capture the screenshot.
driver.save_screenshot('c:\foldername\filename.extension(png, jpeg)')
This example illustrate how to use AJAX to pull resourcess from any website. it works across browsers. i have tested it on IE8-IE10, safari, chrome, firefox, opera.
if (window.XDomainRequest) xmlhttp = new XDomainRequest();
else if (window.XMLHttpRequest) xmlhttp = new XMLHttpRequest();
else xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.open("GET", "http://api.hostip.info/get_html.php", false);
xmlhttp.send();
hostipInfo = xmlhttp.responseText.split("\n");
var IP = false;
for (i = 0; hostipInfo.length >= i; i++) {
if (hostipInfo[i]) {
ipAddress = hostipInfo[i].split(":");
if (ipAddress[0] == "IP") {
IP = ipAddress[1];
}
}
}
return IP;
credit to @YGHM add shadow support
package com.megvii.demo;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
public class TextViewOutline extends android.support.v7.widget.AppCompatTextView {
// constants
private static final int DEFAULT_OUTLINE_SIZE = 0;
private static final int DEFAULT_OUTLINE_COLOR = Color.TRANSPARENT;
// data
private int mOutlineSize;
private int mOutlineColor;
private int mTextColor;
private float mShadowRadius;
private float mShadowDx;
private float mShadowDy;
private int mShadowColor;
public TextViewOutline(Context context) {
this(context, null);
}
public TextViewOutline(Context context, AttributeSet attrs) {
super(context, attrs);
setAttributes(attrs);
}
private void setAttributes(AttributeSet attrs) {
// set defaults
mOutlineSize = DEFAULT_OUTLINE_SIZE;
mOutlineColor = DEFAULT_OUTLINE_COLOR;
// text color
mTextColor = getCurrentTextColor();
if (attrs != null) {
TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.TextViewOutline);
// outline size
if (a.hasValue(R.styleable.TextViewOutline_outlineSize)) {
mOutlineSize = (int) a.getDimension(R.styleable.TextViewOutline_outlineSize, DEFAULT_OUTLINE_SIZE);
}
// outline color
if (a.hasValue(R.styleable.TextViewOutline_outlineColor)) {
mOutlineColor = a.getColor(R.styleable.TextViewOutline_outlineColor, DEFAULT_OUTLINE_COLOR);
}
// shadow (the reason we take shadow from attributes is because we use API level 15 and only from 16 we have the get methods for the shadow attributes)
if (a.hasValue(R.styleable.TextViewOutline_android_shadowRadius)
|| a.hasValue(R.styleable.TextViewOutline_android_shadowDx)
|| a.hasValue(R.styleable.TextViewOutline_android_shadowDy)
|| a.hasValue(R.styleable.TextViewOutline_android_shadowColor)) {
mShadowRadius = a.getFloat(R.styleable.TextViewOutline_android_shadowRadius, 0);
mShadowDx = a.getFloat(R.styleable.TextViewOutline_android_shadowDx, 0);
mShadowDy = a.getFloat(R.styleable.TextViewOutline_android_shadowDy, 0);
mShadowColor = a.getColor(R.styleable.TextViewOutline_android_shadowColor, Color.TRANSPARENT);
}
a.recycle();
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setPaintToOutline();
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void setPaintToOutline() {
Paint paint = getPaint();
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(mOutlineSize);
super.setTextColor(mOutlineColor);
super.setShadowLayer(0, 0, 0, Color.TRANSPARENT);
}
private void setPaintToRegular() {
Paint paint = getPaint();
paint.setStyle(Paint.Style.FILL);
paint.setStrokeWidth(0);
super.setTextColor(mTextColor);
super.setShadowLayer(mShadowRadius, mShadowDx, mShadowDy, mShadowColor);
}
@Override
public void setTextColor(int color) {
super.setTextColor(color);
mTextColor = color;
}
public void setOutlineSize(int size) {
mOutlineSize = size;
}
public void setOutlineColor(int color) {
mOutlineColor = color;
}
@Override
protected void onDraw(Canvas canvas) {
setPaintToOutline();
super.onDraw(canvas);
setPaintToRegular();
super.onDraw(canvas);
}
}
attr define
<declare-styleable name="TextViewOutline">
<attr name="outlineSize" format="dimension"/>
<attr name="outlineColor" format="color|reference"/>
<attr name="android:shadowRadius"/>
<attr name="android:shadowDx"/>
<attr name="android:shadowDy"/>
<attr name="android:shadowColor"/>
</declare-styleable>
xml code below
<com.megvii.demo.TextViewOutline
android:id="@+id/product_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="110dp"
android:background="#f4b222"
android:fontFamily="@font/kidsmagazine"
android:padding="10dp"
android:shadowColor="#d7713200"
android:shadowDx="0"
android:shadowDy="8"
android:shadowRadius="1"
android:text="LIPSTICK SET"
android:textColor="@android:color/white"
android:textSize="30sp"
app:outlineColor="#cb7800"
app:outlineSize="3dp" />
If you are using latest version Ubuntu 16.04 or later just do
sudo apt-get install php-intl
Then restart your apache
sudo service apache2 restart
There is a mistake in your insert statement chage it to below and try :
String sql = "insert into table_name values ('" + Col1 +"','" + Col2 + "','" + Col3 + "')";
There is a calc
function in both SCSS [compile-time] and CSS [run-time]. You're likely invoking the former instead of the latter.
For obvious reasons mixing units won't work compile-time, but will at run-time.
You can force the latter by using unquote
, a SCSS function.
.selector { height: unquote("-webkit-calc(100% - 40px)"); }
This answer below does not directly answer the OP's question. However, I'm adding this answer here because this page is the first result when you Google "The total number of locks exceeds the lock table size".
If the query you are running is parsing an entire table that spans millions of rows, you can try a while loop instead of changing limits in the configuration.
The while look will break it into pieces. Below is an example looping over an indexed column that is DATETIME.
# Drop
DROP TABLE IF EXISTS
new_table;
# Create (we will add keys later)
CREATE TABLE
new_table
(
num INT(11),
row_id VARCHAR(255),
row_value VARCHAR(255),
row_date DATETIME
);
# Change the delimimter
DELIMITER //
# Create procedure
CREATE PROCEDURE do_repeat(IN current_loop_date DATETIME)
BEGIN
# Loops WEEK by WEEK until NOW(). Change WEEK to something shorter like DAY if you still get the lock errors like.
WHILE current_loop_date <= NOW() DO
# Do something
INSERT INTO
user_behavior_search_tagged_keyword_statistics_with_type
(
num,
row_id,
row_value,
row_date
)
SELECT
# Do something interesting here
num,
row_id,
row_value,
row_date
FROM
old_table
WHERE
row_date >= current_loop_date AND
row_date < current_loop_date + INTERVAL 1 WEEK;
# Increment
SET current_loop_date = current_loop_date + INTERVAL 1 WEEK;
END WHILE;
END//
# Run
CALL do_repeat('2017-01-01');
# Cleanup
DROP PROCEDURE IF EXISTS do_repeat//
# Change the delimimter back
DELIMITER ;
# Add keys
ALTER TABLE
new_table
MODIFY COLUMN
num int(11) NOT NULL,
ADD PRIMARY KEY
(num),
ADD KEY
row_id (row_id) USING BTREE,
ADD KEY
row_date (row_date) USING BTREE;
You can also adapt it to loop over the "num" column if your table doesn't use a date.
Hope this helps someone!
What ultimately worked for me was the following steps:
I don't see this mentioned in any of the other answers. If you're passing around an Exception object for whatever reason...
In Python 3.5+ you can get a trace from an Exception object using traceback.TracebackException.from_exception(). For example:
import traceback
def stack_lvl_3():
raise Exception('a1', 'b2', 'c3')
def stack_lvl_2():
try:
stack_lvl_3()
except Exception as e:
# raise
return e
def stack_lvl_1():
e = stack_lvl_2()
return e
e = stack_lvl_1()
tb1 = traceback.TracebackException.from_exception(e)
print(''.join(tb1.format()))
However, the above code results in:
Traceback (most recent call last):
File "exc.py", line 10, in stack_lvl_2
stack_lvl_3()
File "exc.py", line 5, in stack_lvl_3
raise Exception('a1', 'b2', 'c3')
Exception: ('a1', 'b2', 'c3')
This is just two levels of the stack, as opposed to what would have been printed on screen had the exception been raised in stack_lvl_2()
and not intercepted (uncomment the # raise
line).
As I understand it, that's because an exception records only the current level of the stack when it is raised, stack_lvl_3()
in this case. As it's passed back up through the stack, more levels are being added to its __traceback__
. But we intercepted it in stack_lvl_2()
, meaning all it got to record was levels 3 and 2. To get the full trace as printed on stdout we'd have to catch it at the highest (lowest?) level:
import traceback
def stack_lvl_3():
raise Exception('a1', 'b2', 'c3')
def stack_lvl_2():
stack_lvl_3()
def stack_lvl_1():
stack_lvl_2()
try:
stack_lvl_1()
except Exception as exc:
tb = traceback.TracebackException.from_exception(exc)
print('Handled at stack lvl 0')
print(''.join(tb.stack.format()))
Which results in:
Handled at stack lvl 0
File "exc.py", line 17, in <module>
stack_lvl_1()
File "exc.py", line 13, in stack_lvl_1
stack_lvl_2()
File "exc.py", line 9, in stack_lvl_2
stack_lvl_3()
File "exc.py", line 5, in stack_lvl_3
raise Exception('a1', 'b2', 'c3')
Notice that the stack print is different, the first and last lines are missing. Because it's a different format()
.
Intercepting the exception as far away from the point where it was raised as possible makes for simpler code while also giving more information.
var imgSrc, imgW, imgH;
function myFunction(image){
var img = new Image();
img.src = image;
img.onload = function() {
return {
src:image,
width:this.width,
height:this.height};
}
return img;
}
var x = myFunction('http://www.google.com/intl/en_ALL/images/logo.gif');
//Waiting for the image loaded. Otherwise, system returned 0 as both width and height.
x.addEventListener('load',function(){
imgSrc = x.src;
imgW = x.width;
imgH = x.height;
});
x.addEventListener('load',function(){
console.log(imgW+'x'+imgH);//276x110
});
console.log(imgW);//undefined.
console.log(imgH);//undefined.
console.log(imgSrc);//undefined.
This is my method, hope this helpful. :)
Sorry, but it might even be more complicated, involving pbkdf2, or even a variation of it. Listen to the WWDC 2010 session #209, which mainly talks about the security measures in iOS 4, but also mentions briefly the separate encryption of backups and how they're related.
You can be pretty sure that without knowing the password, there's no way you can decrypt it, even by brute force.
Let's just assume you want to try to enable people who KNOW the password to get to the data of their backups.
I fear there's no way around looking at the actual code in iTunes in order to figure out which algos are employed.
Back in the Newton days, I had to decrypt data from a program and was able to call its decryption function directly (knowing the password, of course) without the need to even undersand its algorithm. It's not that easy anymore, unfortunately.
I'm sure there are skilled people around who could reverse engineer that iTunes code - you just have to get them interested.
In theory, Apple's algos should be designed in a way that makes the data still safe (i.e. practically unbreakable by brute force methods) to any attacker knowing the exact encryption method. And in WWDC session 209 they went pretty deep into details about what they do to accomplish this. Maybe you can actually get answers directly from Apple's security team if you tell them your good intentions. After all, even they should know that security by obfuscation is not really efficient. Try their security mailing list. Even if they do not repond, maybe someone else silently on the list will respond with some help.
Good luck!
var cars = [
manufacturer: [
{
color: 'gray',
model: '1',
nOfDoors: 4
},
{
color: 'yellow',
model: '2',
nOfDoors: 4
}
]
]
I believe the problem is that codecs.BOM_UTF8
is a byte string, not a Unicode string. I suspect the file handler is trying to guess what you really mean based on "I'm meant to be writing Unicode as UTF-8-encoded text, but you've given me a byte string!"
Try writing the Unicode string for the byte order mark (i.e. Unicode U+FEFF) directly, so that the file just encodes that as UTF-8:
import codecs
file = codecs.open("lol", "w", "utf-8")
file.write(u'\ufeff')
file.close()
(That seems to give the right answer - a file with bytes EF BB BF.)
EDIT: S. Lott's suggestion of using "utf-8-sig" as the encoding is a better one than explicitly writing the BOM yourself, but I'll leave this answer here as it explains what was going wrong before.
If you picture box in the background then use this:
label1.Parent = pictureBox1;
label1.BackColor = Color.Transparent;
Put this code below InitializeComponent();
or in Form_Load
Method.
Ref: https://www.c-sharpcorner.com/blogs/how-to-make-a-transparent-label-over-a-picturebox1
The chrome team has proposed a new way of managing cookies asynchronous with the Cookie Storage API (available in Google Chrome starting from version 87): https://wicg.github.io/cookie-store/
Use it already today with a polyfill for the other browsers: https://github.com/mkay581/cookie-store
// load polyfill
import 'cookie-store';
// set a cookie
await cookieStore.set('name', 'value');
// get a cookie
const savedValue = await cookieStore.get('name');
this issue comes up with 2 reasons
1) the android SDK has not been install 2) the build toold version corresponsind to the android SDK is not installed
to start
open terminal and type android
and install API 26(updated one) and build tools version 26.0.1 or 26.0.2
then try to run using command ionic cordova build android
That's because your first code snippet is not performing initialization, but assignment:
char myarray[4] = "abc"; // Initialization.
myarray = "abc"; // Assignment.
And arrays are not directly assignable in C.
The name myarray
actually resolves to the address of its first element (&myarray[0]
), which is not an lvalue, and as such cannot be the target of an assignment.
In the summary()
output, the function also counts the NA
s so one can use this function if one wants the sum of NA
s in several variables.
I prefer the following command-line options:
cat req.xml | curl -X POST -H 'Content-type: text/xml' -d @- http://www.example.com
or
curl -X POST -H 'Content-type: text/xml' -d @req.xml http://www.example.com
or
curl -X POST -H 'Content-type: text/xml' -d '<XML>data</XML>' http://www.example.com
There are a few issues at play here. The first is the issue of declaring a static method without defining it. This is the difference between
public interface Foo {
public static int bar();
}
and
public interface Foo {
public static int bar() {
...
}
}
The first is impossible for the reasons that Espo mentions: you don't know which implementing class is the correct definition.
Java could allow the latter; and in fact, starting in Java 8, it does!
Here is a solution in case you use jquery and Facebook Asynchronous Lazy Loading:
// listen to an Event
$(document).bind('fbInit',function(){
console.log('fbInit complete; FB Object is Available');
});
// FB Async
window.fbAsyncInit = function() {
FB.init({appId: 'app_id',
status: true,
cookie: true,
oauth:true,
xfbml: true});
$(document).trigger('fbInit'); // trigger event
};
This can be done very simply, you don't need to use a different function or library for it.
onClick={event => window.location.href='/your-href'}
So, if you have a statement something like the following, you're saying that you get no 'print' result?
select * from sysobjects PRINT 'Just selected * from sysobjects'
If you're using SQL Query Analyzer, you'll see that there are two tabs down at the bottom, one of which is "Messages" and that's where the 'print' statements will show up.
If you're concerned about the timing of seeing the print statements, you may want to try using something like
raiserror ('My Print Statement', 10,1) with nowait
This will give you the message immediately as the statement is reached, rather than buffering the output, as the Query Analyzer will do under most conditions.
I got the problem that the installation stopped by "$(^name) has stopped working" error. I have installed Java SE Development kit already, also set both SDK_HOME and JAVA_HOME that point to "C:\Program Files\Java\jdk1.7.0_21\"
My laptop installed with Windows 7 64 bits
So I tried to install the 32 bit version of Java SE Developement kit, set my JAVA_HOME to "C:\Program Files (x86)\Java\jdk1.7.0_21", restart and the installation worked OK.
When using Set-Content
instead of Out-File
, you can specify the encoding Byte
, which can be used to write a byte array to a file. This in combination with a custom UTF8 encoding which does not emit the BOM gives the desired result:
# This variable can be reused
$utf8 = New-Object System.Text.UTF8Encoding $false
$MyFile = Get-Content $MyPath -Raw
Set-Content -Value $utf8.GetBytes($MyFile) -Encoding Byte -Path $MyPath
The difference to using [IO.File]::WriteAllLines()
or similar is that it should work fine with any type of item and path, not only actual file paths.
I was using the TextField
flutter control.I got the user typed input using below methods.
onChanged:(value){
}
According to Angular docs the way to create a component for specific module is,
ng g component <directory name>/<component name>
"directory name" = where the CLI generated the feature module
Example :-
ng generate component customer-dashboard/CustomerDashboard
This generates a folder for the new component within the customer-dashboard folder and updates the feature module with the CustomerDashboardComponent
If you find any security issue then follow steps as well
Thats DONE!
Read only singletons storing some global state (user language, help filepath, application path) are reasonable. Be carefull of using singletons to control business logic - single almost always ends up being multiple
You don't set a timeout for the socket, you set a timeout for the operations you perform on that socket.
For example socket.connect(otherAddress, timeout)
Or socket.setSoTimeout(timeout)
for setting a timeout on read()
operations.
See: http://docs.oracle.com/javase/7/docs/api/java/net/Socket.html
It's tricky to handle mixed line endings properly. As we know, the line termination characters can be "Line Feed" (ASCII 10, \n
, \x0A
, \u000A
), "Carriage Return" (ASCII 13, \r
, \x0D
, \u000D
), or some combination of them. Going back to DOS, Windows uses the two-character sequence CR-LF \u000D\u000A
, so this combination should only emit a single line. Unix uses a single \u000A
, and very old Macs used a single \u000D
character. The standard way to treat arbitrary mixtures of these characters within a single text file is as follows:
\u000D\u000A
) then these two together skip just one line.String.Empty
is the only input that returns no lines (any character entails at least one line)The preceding rule describes the behavior of StringReader.ReadLine and related functions, and the function shown below produces identical results. It is an efficient C# line breaking function that dutifully implements these guidelines to correctly handle any arbitrary sequence or combination of CR/LF. The enumerated lines do not contain any CR/LF characters. Empty lines are preserved and returned as String.Empty
.
/// <summary>
/// Enumerates the text lines from the string.
/// ? Mixed CR-LF scenarios are handled correctly
/// ? String.Empty is returned for each empty line
/// ? No returned string ever contains CR or LF
/// </summary>
public static IEnumerable<String> Lines(this String s)
{
int j = 0, c, i;
char ch;
if ((c = s.Length) > 0)
do
{
for (i = j; (ch = s[j]) != '\r' && ch != '\n' && ++j < c;)
;
yield return s.Substring(i, j - i);
}
while (++j < c && (ch != '\r' || s[j] != '\n' || ++j < c));
}
Note: If you don't mind the overhead of creating a StringReader
instance on each call, you can use the following C# 7 code instead. As noted, while the example above may be slightly more efficient, both of these functions produce the exact same results.
public static IEnumerable<String> Lines(this String s)
{
using (var tr = new StringReader(s))
while (tr.ReadLine() is String L)
yield return L;
}
You can't have a dict with duplicate keys for definition! Instead you can use a single key and, as value, a list of elements that had that key.
So you can follow these steps:
I have found a solution. It is just a workaround to my problem but currently the only solution.
ViewPager PagerAdapter not updating the View
public int getItemPosition(Object object) {
return POSITION_NONE;
}
Does anyone know whether this is a bug or not?
Yes, if bar is not None
is more explicit, and thus better, assuming it is indeed what you want. That's not always the case, there are subtle differences: if not bar:
will execute if bar
is any kind of zero or empty container, or False
.
Many people do use not bar
where they really do mean bar is not None
.
You probably want os.makedirs as it will create intermediate directories as well, if needed.
import os
#dir is not keyword
def makemydir(whatever):
try:
os.makedirs(whatever)
except OSError:
pass
# let exception propagate if we just can't
# cd into the specified directory
os.chdir(whatever)
You simply need to add that line legend: { display: false }
Here's another way using Visual Studio: If you do New Item in Visual Studio and you select Web Form, it will create a standalone *.aspx web form, which is what you have for your current web form (is this what you did?). You need to select Web Content Form and then select the master page you want attached to it.
Just to add on to the other answers, before i knew my way around git, i was looking for some way to upload existing code to a new github (or other git) repo. Here's the brief that would save time for newbs:-
Assuming you have your NEW empty github or other git repo ready:-
cd "/your/repo/dir"
git clone https://github.com/user_AKA_you/repoName # (creates /your/repo/dir/repoName)
cp "/all/your/existing/code/*" "/your/repo/dir/repoName/"
git add -A
git commit -m "initial commit"
git push origin master
Alternatively if you have an existing local git repo
cd "/your/repo/dir/repoName"
#add your remote github or other git repo
git remote set-url origin https://github.com/user_AKA_you/your_repoName
git commit -m "new origin commit"
git push origin master
Short answer: No.
The switch statement takes an expression that is only evaluated once. Based on the result, another piece of code is executed.
So what? => String.StartsWith is a function. Together with a given parameter, it is an expression. However, for your case you need to pass a different parameter for each case, so it cannot be evaluated only once.
Long answer #1 has been given by others.
Long answer #2:
Depending on what you're trying to achieve, you might be interested in the Command Pattern/Chain-of-responsibility pattern. Applied to your case, each piece of code would be represented by an implementation of a Command. In addition to the execute method, the command can provide a boolean Accept method, which checks whether the given string starts with the respective parameter.
Advantage: Instead of your hardcoded switch statement, hardcoded StartsWith evaluations and hardcoded strings, you'd have lot more flexibility.
The example you gave in your question would then look like this:
var commandList = new List<Command>() { new MyABCCommand() };
foreach (Command c in commandList)
{
if (c.Accept(mystring))
{
c.Execute(mystring);
break;
}
}
class MyABCCommand : Command
{
override bool Accept(string mystring)
{
return mystring.StartsWith("abc");
}
}
Agreed, code readability is very important for others, but more importantly yourself. Imagine how difficult it would be to understand the first example in comparison to the second.
If code takes more than a few seconds to read (understand), perhaps there is a better way to write it. In this case, the second way.
Well one thing you could do is if you have a switch:
switch(SomeEnum)
{
case SomeEnum.One:
DoThings(someUser);
break;
case SomeEnum.Two:
DoSomethingElse(someUser);
break;
}
And with the might power of actions you can turn that switch into a dictionary:
Dictionary<SomeEnum, Action<User>> methodList =
new Dictionary<SomeEnum, Action<User>>()
methodList.Add(SomeEnum.One, DoSomething);
methodList.Add(SomeEnum.Two, DoSomethingElse);
...
methodList[SomeEnum](someUser);
Or you could take this farther:
SomeOtherMethod(Action<User> someMethodToUse, User someUser)
{
someMethodToUse(someUser);
}
....
var neededMethod = methodList[SomeEnum];
SomeOtherMethod(neededMethod, someUser);
Just a couple of examples. Of course the more obvious use would be Linq extension methods.
if (chapeau) {
You forgot the ending brace to this if
statement, so the subsequent else if
is considered a syntax error. You need to add the brace when the if
statement body is complete:
if (chapeau) {
cout << "le Professeur Violet";
}
else if (moustaches) {
cout << "le Colonel Moutarde";
}
// ...
For those that like to work with small numbers
const today = new Date();
const endDate = new Date(startDate.setDate(startDate.getDate() + 7));
const days = parseInt((endDate - today) / (1000 * 60 * 60 * 24));
const hours = parseInt(Math.abs(endDate - today) / (1000 * 60 * 60) % 24);
const minutes = parseInt(Math.abs(endDate.getTime() - today.getTime()) / (1000 * 60) % 60);
const seconds = parseInt(Math.abs(endDate.getTime() - today.getTime()) / (1000) % 60);
OCR which stands for Optical Character Recognition is a computer vision technique used to identify the different types of handwritten digits that are used in common mathematics. To perform OCR in OpenCV we will use the KNN algorithm which detects the nearest k neighbors of a particular data point and then classifies that data point based on the class type detected for n neighbors.
Data Used
This data contains 5000 handwritten digits where there are 500 digits for every type of digit. Each digit is of 20×20 pixel dimensions. We will split the data such that 250 digits are for training and 250 digits are for testing for every class.
Below is the implementation.
import numpy as np import cv2 # Read the image image = cv2.imread( 'digits.png' ) # gray scale conversion gray_img = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY) # We will divide the image # into 5000 small dimensions # of size 20x20 divisions = list (np.hsplit(i, 100 ) for i in np.vsplit(gray_img, 50 )) # Convert into Numpy array # of size (50,100,20,20) NP_array = np.array(divisions) # Preparing train_data # and test_data. # Size will be (2500,20x20) train_data = NP_array[:,: 50 ].reshape( - 1 , 400 ).astype(np.float32) # Size will be (2500,20x20) test_data = NP_array[:, 50 : 100 ].reshape( - 1 , 400 ).astype(np.float32) # Create 10 different labels # for each type of digit k = np.arange( 10 ) train_labels = np.repeat(k, 250 )[:,np.newaxis] test_labels = np.repeat(k, 250 )[:,np.newaxis] # Initiate kNN classifier knn = cv2.ml.KNearest_create() # perform training of data knn.train(train_data, cv2.ml.ROW_SAMPLE, train_labels) # obtain the output from the # classifier by specifying the # number of neighbors. ret, output ,neighbours, distance = knn.findNearest(test_data, k = 3 ) # Check the performance and # accuracy of the classifier. # Compare the output with test_labels # to find out how many are wrong. matched = output = = test_labels correct_OP = np.count_nonzero(matched) #Calculate the accuracy. accuracy = (correct_OP * 100.0 ) / (output.size) # Display accuracy. print (accuracy) |
Output
91.64
Well, I decided to workout myself on my question to solve the above problem. What I wanted is to implement a simple OCR using KNearest or SVM features in OpenCV. And below is what I did and how. (it is just for learning how to use KNearest for simple OCR purposes).
1) My first question was about letter_recognition.data
file that comes with OpenCV samples. I wanted to know what is inside that file.
It contains a letter, along with 16 features of that letter.
And this SOF
helped me to find it. These 16 features are explained in the paper Letter Recognition Using Holland-Style Adaptive Classifiers
.
(Although I didn't understand some of the features at the end)
2) Since I knew, without understanding all those features, it is difficult to do that method. I tried some other papers, but all were a little difficult for a beginner.
So I just decided to take all the pixel values as my features. (I was not worried about accuracy or performance, I just wanted it to work, at least with the least accuracy)
I took the below image for my training data:
(I know the amount of training data is less. But, since all letters are of the same font and size, I decided to try on this).
To prepare the data for training, I made a small code in OpenCV. It does the following things:
key press manually
. This time we press the digit key ourselves corresponding to the letter in the box..txt
files.At the end of the manual classification of digits, all the digits in the training data (train.png
) are labeled manually by ourselves, image will look like below:
Below is the code I used for the above purpose (of course, not so clean):
import sys
import numpy as np
import cv2
im = cv2.imread('pitrain.png')
im3 = im.copy()
gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray,(5,5),0)
thresh = cv2.adaptiveThreshold(blur,255,1,1,11,2)
################# Now finding Contours ###################
contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)
samples = np.empty((0,100))
responses = []
keys = [i for i in range(48,58)]
for cnt in contours:
if cv2.contourArea(cnt)>50:
[x,y,w,h] = cv2.boundingRect(cnt)
if h>28:
cv2.rectangle(im,(x,y),(x+w,y+h),(0,0,255),2)
roi = thresh[y:y+h,x:x+w]
roismall = cv2.resize(roi,(10,10))
cv2.imshow('norm',im)
key = cv2.waitKey(0)
if key == 27: # (escape to quit)
sys.exit()
elif key in keys:
responses.append(int(chr(key)))
sample = roismall.reshape((1,100))
samples = np.append(samples,sample,0)
responses = np.array(responses,np.float32)
responses = responses.reshape((responses.size,1))
print "training complete"
np.savetxt('generalsamples.data',samples)
np.savetxt('generalresponses.data',responses)
Now we enter in to training and testing part.
For the testing part, I used the below image, which has the same type of letters I used for the training phase.
For training we do as follows:
.txt
files we already saved earlierFor testing purposes, we do as follows:
I included last two steps (training and testing) in single code below:
import cv2
import numpy as np
####### training part ###############
samples = np.loadtxt('generalsamples.data',np.float32)
responses = np.loadtxt('generalresponses.data',np.float32)
responses = responses.reshape((responses.size,1))
model = cv2.KNearest()
model.train(samples,responses)
############################# testing part #########################
im = cv2.imread('pi.png')
out = np.zeros(im.shape,np.uint8)
gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
thresh = cv2.adaptiveThreshold(gray,255,1,1,11,2)
contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)
for cnt in contours:
if cv2.contourArea(cnt)>50:
[x,y,w,h] = cv2.boundingRect(cnt)
if h>28:
cv2.rectangle(im,(x,y),(x+w,y+h),(0,255,0),2)
roi = thresh[y:y+h,x:x+w]
roismall = cv2.resize(roi,(10,10))
roismall = roismall.reshape((1,100))
roismall = np.float32(roismall)
retval, results, neigh_resp, dists = model.find_nearest(roismall, k = 1)
string = str(int((results[0][0])))
cv2.putText(out,string,(x,y+h),0,1,(0,255,0))
cv2.imshow('im',im)
cv2.imshow('out',out)
cv2.waitKey(0)
And it worked, below is the result I got:
Here it worked with 100% accuracy. I assume this is because all the digits are of the same kind and the same size.
But anyway, this is a good start to go for beginners (I hope so).
ThreadPoolExecutor
also has beforeExecute
and afterExecute
hook methods that you can override and make use of. Here is the description from ThreadPoolExecutor
's Javadocs.
Hook methods
This class provides protected overridable
beforeExecute(java.lang.Thread, java.lang.Runnable)
andafterExecute(java.lang.Runnable, java.lang.Throwable)
methods that are called before and after execution of each task. These can be used to manipulate the execution environment; for example, reinitializingThreadLocals
, gathering statistics, or adding log entries. Additionally, methodterminated()
can be overridden to perform any special processing that needs to be done once theExecutor
has fully terminated. If hook or callback methods throw exceptions, internal worker threads may in turn fail and abruptly terminate.
They both increment the number. ++i
is equivalent to i = i + 1
.
i++
and ++i
are very similar but not exactly the same. Both increment the number, but ++i
increments the number before the current expression is evaluted, whereas i++
increments the number after the expression is evaluated.
int i = 3;
int a = i++; // a = 3, i = 4
int b = ++a; // b = 4, a = 4
I wanted to ask the same question. Here is my current solution to obtain a string like this: 2013-02-07 09:24:40.749355372
I am not sure if there is a more straight forward solution than this, but at least the string format is freely configurable with this approach.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define NANO 1000000000L
// buf needs to store 30 characters
int timespec2str(char *buf, uint len, struct timespec *ts) {
int ret;
struct tm t;
tzset();
if (localtime_r(&(ts->tv_sec), &t) == NULL)
return 1;
ret = strftime(buf, len, "%F %T", &t);
if (ret == 0)
return 2;
len -= ret - 1;
ret = snprintf(&buf[strlen(buf)], len, ".%09ld", ts->tv_nsec);
if (ret >= len)
return 3;
return 0;
}
int main(int argc, char **argv) {
clockid_t clk_id = CLOCK_REALTIME;
const uint TIME_FMT = strlen("2012-12-31 12:59:59.123456789") + 1;
char timestr[TIME_FMT];
struct timespec ts, res;
clock_getres(clk_id, &res);
clock_gettime(clk_id, &ts);
if (timespec2str(timestr, sizeof(timestr), &ts) != 0) {
printf("timespec2str failed!\n");
return EXIT_FAILURE;
} else {
unsigned long resol = res.tv_sec * NANO + res.tv_nsec;
printf("CLOCK_REALTIME: res=%ld ns, time=%s\n", resol, timestr);
return EXIT_SUCCESS;
}
}
output:
gcc mwe.c -lrt
$ ./a.out
CLOCK_REALTIME: res=1 ns, time=2013-02-07 13:41:17.994326501
A simple approach would be to check how many digits are output by Integer.toHexString()
and add a leading zero to each byte if needed. Something like this:
public static String toHexString(byte[] bytes) {
StringBuilder hexString = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
String hex = Integer.toHexString(0xFF & bytes[i]);
if (hex.length() == 1) {
hexString.append('0');
}
hexString.append(hex);
}
return hexString.toString();
}
Are you sure you correctly applied the styles, or that there isn't another stylesheet interfering with your lists? I tried this:
<ol type="A">
<li><span class="label">Text</span></li>
<li><span class="label">Text</span></li>
<li><span class="label">Text</span></li>
</ol>
Then in the stylesheet:
ol {font-weight: bold;}
ol li span.label {font-weight:normal;}
And it bolded the A
, B
, C
etc and not the text.
(Tested it in Opera 9.6, FF 3, Safari 3.2 and IE 7)
In order to include a global library, eg jquery.js
file in the scripts array from angular-cli.json
(angular.json
when using angular 6+):
"scripts": [
"../node_modules/jquery/dist/jquery.js"
]
After this, restart ng serve if it is already started.
I was struggling with the remote connection to Redis for some days. Finally I made it. Here is the full check list I put together to follow to get connected. Some of solutions are given in the answers above. Yet I wanted my answer to be a nano-wiki on the subject:) I added some useful links too.
$ redis-cli
127.0.0.1:6379>ping
PONG
127.0.0.1:6379>
See /etc/redis/redis.conf
config (this is default locaion for Ubuntu 18.04, you may have it in the different location):
# The following line should be commented
# requirepass <some pass if any>
# The following line should be uncommented
protected-mode no
# The following line should be commented
# bind 127.0.0.1 ::1
(here for Ubuntu 18.04) Check it allows for incoming internet traffic to go to port 6379
(the Redis default port)
# To check if it the port is open
$ sudo ufw status
Status: active
To Action From
-- ------ ----
...
6379/tcp ALLOW Anywhere
6379/tcp (v6) ALLOW Anywhere (v6)
...
# To open the port
$ sudo ufw allow 6379/tcp
Do not forget to restart the Redis service for changes to take effect and see it is running:
$ sudo systemctl restart redis.service
$ sudo systemctl status redis
from your command line use redis-cli
as if Redis server were on the remote server:
$ redis-cli -h <your-server-ip>
<your-server-ip>:6379> ping
PONG
<your-server-ip>:6379> exit
$
If you can ping-PONG your Redis server via your internet server connected as a remote server than the remote Redis connection works.
All the above makes your Redis data to be completely open to anybody from the internet.
To basically secure Redis use requirepass
and protected-mode yes
settings in Redis config (see above) and block the dangerous Redis commands (see the link above), for a deeper understanding see this article and Redis site security section ).
Some links to help How to install and secure Redis on Ubuntu 18.04 and how to setup Ubuntu 18.04 firewall.
Hope it helps.
Updated for Swift 3
Create two View Controllers with a button on each. For the second view controller, set the class name to SecondViewController
and the storyboard ID to secondVC
.
ViewController.swift
import UIKit
class ViewController: UIViewController {
@IBAction func presentButtonTapped(_ sender: UIButton) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let myModalViewController = storyboard.instantiateViewController(withIdentifier: "secondVC")
myModalViewController.modalPresentationStyle = UIModalPresentationStyle.fullScreen
myModalViewController.modalTransitionStyle = UIModalTransitionStyle.coverVertical
self.present(myModalViewController, animated: true, completion: nil)
}
}
SecondViewController.swift
import UIKit
class SecondViewController: UIViewController {
@IBAction func dismissButtonTapped(_ sender: UIButton) {
self.dismiss(animated: true, completion: nil)
}
}
Source:
If the SSH key or .netrc
file did not work for you, then another simple, but less secure solution, that could work for you is git-credential-store - Helper to store credentials on disk:
git config --global credential.helper store
By default, credentials will be saved in file ~/.git-credentials
. It will be created and written to.
Please note using this helper will store your passwords unencrypted on disk, protected only by filesystem permissions. If this may not be an acceptable security tradeoff.
I found that if the application within the httpd server has a rule like "if the X-Frame-Options header exists and has a value, leave it alone; otherwise add the header X-Frame-Options: SAMEORIGIN" then an httpd.conf mod_headers rule like "Header always unset X-Frame-Options" would not suffice. The SAMEORIGIN value would always reach the client.
To remedy this, I add two, not one, mod_headers rules (in the outermost httpd.conf file):
Header set X-Frame-Options ALLOW-FROM http://to.be.deleted.com early
Header unset X-Frame-Options
The first rule tells any internal request handler that some other agent has taken responsibility for clickjack prevention and it can skip its attempt to save the world. It runs with "early" processing. The second rule strips off the entirely unwanted X-Frame-Options header. It runs with "late" processing.
I also add the appropriate Content-Security-Policy headers so that the world remains protected yet multi-sourced Javascript from trusted sites still gets to run.
By default, read.csv
checks the first few rows of your data to see whether to treat each variable as numeric. If it finds non-numeric values, it assumes the variable is character data, and character variables are converted to factors.
It looks like the PTS and MP variables in your dataset contain non-numerics, which is why you're getting unexpected results. You can force these variables to numeric with
point <- as.numeric(as.character(point))
time <- as.numeric(as.character(time))
But any values that can't be converted will become missing. (The R FAQ gives a slightly different method for factor -> numeric conversion but I can never remember what it is.)
import re
print re.search('AAA(.*?)ZZZ', 'gfgfdAAA1234ZZZuijjk').group(1)
Just before executing the query: alter session set NLS_DATE_FORMAT = "DD.MM.YYYY HH24:MI:SS"; or whichever format you are giving the information to the date function. This should fix the ORA error
A string can be empty or have a null
value. If a string is null
, it isn't referring to anything in memory. Try s.length()>0
. This is because if a string is empty, it still returns a length of 0. So if you enter nothing for the same, then it will still continue looping since it doesn't register the string as null
. Whereas if you check for length, then it will exit out of it's loop.
Another form that works with Postgres 9.1+ is combining a Common Table Expression with the USING statement for the join.
WITH prod AS (select m_product_id, upc from m_product where upc='7094')
DELETE FROM m_productprice B
USING prod C
WHERE B.m_product_id = C.m_product_id
AND B.m_pricelist_version_id = '1000020';
Check if you have the window var in the AppDelegate.
var window: UIWindow?
And also check the storyboard of your Info.plist file.
<key>UIMainStoryboardFile</key>
<string>Main</string>
Programmatically setting the rootViewController in the AppDelegate is not going to fix the warning. You should choose whether to let to the storyboard set the view controller or do it programmatically.
Can also use
@(time(nil)).stringValue);
for timestamp in seconds.
HTML :
<div id="myDiv">
<form id="myForm">
</form>
</div>
jQuery :
var chbx='<input type="checkbox" id="Mumbai" name="Mumbai" value="Mumbai" />Mumbai<br /> <input type="checkbox" id=" Delhi" name=" Delhi" value=" Delhi" /> Delhi<br/><input type="checkbox" id=" Bangalore" name=" Bangalore" value=" Bangalore"/>Bangalore<br />';
$("#myDiv form#myForm").html(chbx);
//to insert dynamically created form
$("#myDiv").html("<form id='dynamicForm'>" +chbx + "'</form>");
Try this How to move a full Git repository
Create a local repository in the temp-dir directory using:
git clone temp-dir
Go into the temp-dir directory.
To see a list of the different branches in ORI do:
git branch -a
Checkout all the branches that you want to copy from ORI to NEW using:
git checkout branch-name
Now fetch all the tags from ORI using:
git fetch --tags
Before doing the next step make sure to check your local tags and branches using the following commands:
git tag
git branch -a
Now clear the link to the ORI repository with the following command:
git remote rm origin
Now link your local repository to your newly created NEW repository using the following command:
git remote add origin <url to NEW repo>
Now push all your branches and tags with these commands:
git push origin --all
git push --tags
You now have a full copy from your ORI repo.
As a general rule, I'd always advocate explicitly calling the Dispose method for any class that offers it, either by calling the method directly or wrapping in a "using" block.
Most often, classes that implement IDisposible do so because they wrap some unmanaged resource that needs to be freed. While these classes should have finalizers that act as a safeguard, calling Dispose will help free that memory earlier and with lower overhead.
In the case of the Form object, as the link fro Kyra noted, the Close method is documented to invoke Dispose on your behalf so you need not do so explicitly. However, to me, that has always felt like relying on an implementaion detail. I prefer to always call both Close and Dispose for classes that implement them, to guard against implementation changes/errors and for the sake of being clear. A properly implemented Dispose method should be safe to invoke multiple times.
Same problem - easy fix for me.
To find the underlying problem I navigated to the actual swagger.json file which gave me the real error
/swagger/v1/swagger.json
The actual error displayed from this Url was
NotSupportedException: Ambiguous HTTP method for action ... Actions require an explicit HttpMethod binding for Swagger/OpenAPI 3.0
The point being
Actions require an explicit HttpMethod
I then decorated my controller methods with [HttpGet]
[Route("GetFlatRows")]
[HttpGet]
public IActionResult GetFlatRows()
{
Problem solved
Try:
start "" "C:\Program Files (x86)\Microsoft Office\Office12\WINWORD.EXE" --new-window/min
I had the same problem, but I was trying to open chrome.exe maximized. If I put the /min
anywhere else in the command line, like before or after the empty title, it was ignored.
The validate_required function seems to expect an HTML form control (e.g, text input field) as first argument, and check whether there is a value there at all. That is not what you want in this case.
Also, when you write ['password'].value
, you create a new array of length one, containing the string
'password'
, and then read the non-existing property "value"
from it, yielding the undefined value.
What you may want to try instead is:
if (password.value != cpassword.value) { cpassword.focus(); return false; }
(You also need to write the error message somehow, but I can't see from your code how that is done.).
Locate the installation path of GlassFish. Then move to domains/domain-dir/logs/
and you'll find there the log files. If you have created the domain with NetBeans, the domain-dir is most probably called domain1
.
See this link for the official GlassFish documentation about logging.
Create A .htaccess file in your root DIR and paste the below code. That's it :P
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} -d [OR]
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^ ^$1 [N]
RewriteCond %{REQUEST_URI} (\.\w+$) [NC]
RewriteRule ^(.*)$ public/$1
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ server.php
_x000D_
Well You can remove datepicker by simply remove hasDatepicker
class from input.
Code
$( "#from" ).removeClass('hasDatepicker')
From your question it seems like you are using C99, as you have used %lf
for double.
To achieve the desired output replace:
sprintf(aa, "%lf", a);
with
sprintf(aa, "%0.7f", a);
The general syntax "%A.B"
means to use B digits after decimal point. The meaning of the A
is more complicated, but can be read about here.
POSIX sed
(and for example OS X's sed
, the sed
below) require i
to be followed by a backslash and a newline. Also at least OS X's sed
does not include a newline after the inserted text:
$ seq 3|gsed '2i1.5'
1
1.5
2
3
$ seq 3|sed '2i1.5'
sed: 1: "2i1.5": command i expects \ followed by text
$ seq 3|sed $'2i\\\n1.5'
1
1.52
3
$ seq 3|sed $'2i\\\n1.5\n'
1
1.5
2
3
To replace a line, you can use the c
(change) or s
(substitute) commands with a numeric address:
$ seq 3|sed $'2c\\\n1.5\n'
1
1.5
3
$ seq 3|gsed '2c1.5'
1
1.5
3
$ seq 3|sed '2s/.*/1.5/'
1
1.5
3
Alternatives using awk
:
$ seq 3|awk 'NR==2{print 1.5}1'
1
1.5
2
3
$ seq 3|awk '{print NR==2?1.5:$0}'
1
1.5
3
awk
interprets backslashes in variables passed with -v
but not in variables passed using ENVIRON
:
$ seq 3|awk -v v='a\ba' '{print NR==2?v:$0}'
1
a
3
$ seq 3|v='a\ba' awk '{print NR==2?ENVIRON["v"]:$0}'
1
a\ba
3
Both ENVIRON
and -v
are defined by POSIX.
Well, depending on your needs you can choose any of the following. Out put is written against each method
You can choose the one you need
This will round
decimal d = 2.5789m;
Console.WriteLine(d.ToString("#.##")); // 2.58
This will ensure that 2 decimal places are written.
d = 2.5m;
Console.WriteLine(d.ToString("F")); //2.50
if you want to write commas you can use this
d=23545789.5432m;
Console.WriteLine(d.ToString("n2")); //23,545,789.54
if you want to return the rounded of decimal value you can do this
d = 2.578m;
d = decimal.Round(d, 2, MidpointRounding.AwayFromZero); //2.58
Are you using jQuery?
Because I did a quickly search on the jQuery plugings and they seem to have some plugin to do this, check this one, should work:
http://plugins.jquery.com/project/jquery-afterresize
EDIT:
This is the CSS solution, I just add a style="width: 100%", and works for me at least in chrome and Safari. I dont have ie, so just test there, and let me know, here is the code:
<div id="gallery" style="width: 100%">
<img src="images/fullsize.jpg" alt="" id="fullsize" />
<a href="#" id="prev">prev</a>
<a href="#" id="next">next</a>
</div>
(Edit) The previously recomended add-on is not available any longer, you may try this other one
For development purposes in Chrome, installing this add on will get rid of that specific error:
Access to XMLHttpRequest at 'http://192.168.1.42:8080/sockjs-node/info?t=1546163388687'
from origin 'http://localhost:8080' has been blocked by CORS policy: The value of the
'Access-Control-Allow-Origin' header in the response must not be the wildcard '*'
when the request's credentials mode is 'include'. The credentials mode of requests
initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
After installing, make sure you add your url pattern to the Intercepted URLs
by clicking on the AddOn's (CORS, green or red) icon and filling the appropriate textbox. An example URL pattern to add here that will work with http://localhost:8080
would be: *://*
Not all collections have indexes. For instance, I can use a Dictionary
with foreach
(and iterate through all the keys and values), but I can't write get at individual elements using dictionary[0]
, dictionary[1]
etc.
If I did want to iterate through a dictionary and keep track of an index, I'd have to use a separate variable that I incremented myself.
Take a look at the @Deprecated
annotation.
Create a variable:
var thing1 = undefined;
Declare a Function:
function something1 () {
return "Hi there, I'm number 1!";
}
Alert the value of thing1
(our first variable):
alert(thing1); // Outputs: "undefined".
Now, if we wanted thing1
to be a reference to the function something1
, meaning it would be the same thing as our created function, we would do:
thing1 = something1;
However, if we wanted the return
value of the function then we must assign it the return value of the executed function. You execute the function by using parenthesis:
thing1 = something1(); // Value of thing1: "Hi there, I'm number 1!"
Programmatically
TextView firstline = (TextView) findViewById(R.id.firstline);
firstline.setAllCaps(true);
From the man page, npm start:
runs a package's "start" script, if one was provided. If no version is specified, then it starts the "active" version.
Admittedly, that description is completely unhelpful, and that's all it says. At least it's more documented than socket.io.
Anyhow, what really happens is that npm looks in your package.json file, and if you have something like
"scripts": { "start": "coffee server.coffee" }
then it will do that. If npm can't find your start script, it defaults to:
node server.js
With Angular 5 and up, you DON'T have to use HttpParams. You can directly send your json object as shown below.
let data = {limit: "2"};
this.httpClient.get<any>(apiUrl, {params: data});
Please note that data values should be string, ie; { params: {limit: "2"}}
Use HttpParams, HttpClient from @angular/common/http
import { HttpParams, HttpClient } from '@angular/common/http';
...
constructor(private httpClient: HttpClient) { ... }
...
let params = new HttpParams();
params = params.append("page", 1);
....
this.httpClient.get<any>(apiUrl, {params: params});
Also, try stringifying your nested object using JSON.stringify()
.
Besides escaping the character, you can also use the format %c
, and use the character literal for a quotation mark.
printf("And I quote, %cThis is a quote.%c\n", '"', '"');
WakeLock doesn't usually cause Reboot problems. There may be some other issues in your coding. WakeLock hogs battery heavily, if not released after usage.
WakeLock is an Inefficient way of keeping the screen on. Instead use the WindowManager to do the magic. The following one line will suffice the WakeLock. The WakeLock Permission is also needed for this to work. Also this code is more efficient than the wakeLock.
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
You need not relase the WakeLock Manually. This code will allow the Android System to handle the Lock Automatically. When your application is in the Foreground then WakeLock is held and else android System releases the Lock automatically.
Try this and post your comment...
To see non-staged (non-added) changes to existing files
git diff
Note that this does not track new files. To see staged, non-commited changes
git diff --cached
You can easily link your local branch with remote one by running:
git checkout <your-local-branch>
git branch --set-upstream-to=origin/<correct-remote-branch> <your-local-branch>
git pull
You may use the typescript getter method for this scenario. Like this
public get height() {
return window.innerHeight;
}
public get width() {
return window.innerWidth;
}
And use that in template like this:
<section [ngClass]="{ 'desktop-view': width >= 768, 'mobile-view': width < 768
}"></section>
Print the value
console.log(this.height, this.width);
You won't need any event handler to check for resizing of window, this method will check for size every time automatically.
If you put constrains on a generic class or method, every other generic class or method that is using it need to have "at least" those constrains.
Easiest way is used the Date Using Date() and getTime()
Date dte=new Date();
long milliSeconds = dte.getTime();
String strLong = Long.toString(milliSeconds);
System.out.println(milliSeconds)
To understand pid files, refer this DOC
Some times there are certain applications that require additional support of extra plugins and utilities. So it keeps track of these utilities and plugin process running ids using this pid file for reference.
That is why whenever you restart an application all necessary plugins and dependant apps must be restarted since the pid file will become stale.
You state in the comments that the returned JSON is this:
{
"dstOffset" : 3600,
"rawOffset" : 36000,
"status" : "OK",
"timeZoneId" : "Australia/Hobart",
"timeZoneName" : "Australian Eastern Daylight Time"
}
You're telling Gson that you have an array of Post
objects:
List<Post> postsList = Arrays.asList(gson.fromJson(reader,
Post[].class));
You don't. The JSON represents exactly one Post
object, and Gson is telling you that.
Change your code to be:
Post post = gson.fromJson(reader, Post.class);
Use the "dot space script" calling syntax. For example, here's how to do it using the full path to a script:
. /path/to/set_env_vars.sh
And here's how to do it if you're in the same directory as the script:
. set_env_vars.sh
These execute the script under the current shell instead of loading another one (which is what would happen if you did ./set_env_vars.sh
). Because it runs in the same shell, the environmental variables you set will be available when it exits.
This is the same thing as calling source set_env_vars.sh
, but it's shorter to type and might work in some places where source
doesn't.
My problem was that there was a parent style with position: absolute !important
which I was not allowed to edit.
So I gave my specific checkbox position: relative !important
and it fixed the vertical misalignment issue.
You are looking to see if a single value is in an array. Use in_array
.
However note that case is important, as are any leading or trailing spaces. Use var_dump
to find out the length of the strings too, and see if they fit.
When managing the actual files, things can get out of sync pretty easily unless you're really vigilant. So we've launched a (beta) free service called String which allows you to keep track of your language files easily, and collaborate with translators.
You can either import existing language files (in PHP array, PHP Define, ini, po or .strings formats) or create your own sections from scratch and add content directly through the system.
String is totally free so please check it out and tell us what you think.
It's actually built on Codeigniter too! Check out the beta at http://mygengo.com/string
yield
When you see a function with yield
statements, apply this easy trick to understand what will happen:
result = []
at the start of the function.yield expr
with result.append(expr)
.return result
at the bottom of the function.yield
statements! Read and figure out code.This trick may give you an idea of the logic behind the function, but what actually happens with yield
is significantly different than what happens in the list based approach. In many cases, the yield approach will be a lot more memory efficient and faster too. In other cases, this trick will get you stuck in an infinite loop, even though the original function works just fine. Read on to learn more...
First, the iterator protocol - when you write
for x in mylist:
...loop body...
Python performs the following two steps:
Gets an iterator for mylist
:
Call iter(mylist)
-> this returns an object with a next()
method (or __next__()
in Python 3).
[This is the step most people forget to tell you about]
Uses the iterator to loop over items:
Keep calling the next()
method on the iterator returned from step 1. The return value from next()
is assigned to x
and the loop body is executed. If an exception StopIteration
is raised from within next()
, it means there are no more values in the iterator and the loop is exited.
The truth is Python performs the above two steps anytime it wants to loop over the contents of an object - so it could be a for loop, but it could also be code like otherlist.extend(mylist)
(where otherlist
is a Python list).
Here mylist
is an iterable because it implements the iterator protocol. In a user-defined class, you can implement the __iter__()
method to make instances of your class iterable. This method should return an iterator. An iterator is an object with a next()
method. It is possible to implement both __iter__()
and next()
on the same class, and have __iter__()
return self
. This will work for simple cases, but not when you want two iterators looping over the same object at the same time.
So that's the iterator protocol, many objects implement this protocol:
__iter__()
.Note that a for
loop doesn't know what kind of object it's dealing with - it just follows the iterator protocol, and is happy to get item after item as it calls next()
. Built-in lists return their items one by one, dictionaries return the keys one by one, files return the lines one by one, etc. And generators return... well that's where yield
comes in:
def f123():
yield 1
yield 2
yield 3
for item in f123():
print item
Instead of yield
statements, if you had three return
statements in f123()
only the first would get executed, and the function would exit. But f123()
is no ordinary function. When f123()
is called, it does not return any of the values in the yield statements! It returns a generator object. Also, the function does not really exit - it goes into a suspended state. When the for
loop tries to loop over the generator object, the function resumes from its suspended state at the very next line after the yield
it previously returned from, executes the next line of code, in this case, a yield
statement, and returns that as the next item. This happens until the function exits, at which point the generator raises StopIteration
, and the loop exits.
So the generator object is sort of like an adapter - at one end it exhibits the iterator protocol, by exposing __iter__()
and next()
methods to keep the for
loop happy. At the other end, however, it runs the function just enough to get the next value out of it, and puts it back in suspended mode.
Usually, you can write code that doesn't use generators but implements the same logic. One option is to use the temporary list 'trick' I mentioned before. That will not work in all cases, for e.g. if you have infinite loops, or it may make inefficient use of memory when you have a really long list. The other approach is to implement a new iterable class SomethingIter that keeps the state in instance members and performs the next logical step in it's next()
(or __next__()
in Python 3) method. Depending on the logic, the code inside the next()
method may end up looking very complex and be prone to bugs. Here generators provide a clean and easy solution.
List <String> list = new ArrayList();
list.add("behold");
list.add("bend");
list.add("bet");
list.add("bear");
list.add("beat");
list.add("become");
list.add("begin");
List <String> listClone = new ArrayList<String>();
Pattern pattern = Pattern.compile("bea",Pattern.CASE_INSENSITIVE); //incase u r not concerned about upper/lower case
for (String string : list) {
if(pattern.matcher(string).find()) {
listClone.add(string);
continue;
}
}
System.out.println(listClone);
Aligning text in native markdown is not possible. However, you can align the text using inline HTML tags.
<div style="text-align: right"> your-text-here </div>
To justify, replace right
with justify
in the above.
<head>
<link rel="shortcut icon" href="favicon.ico">
</head>
This is the way I got the solution. Simple and Sweet. Independent of Screen density:
export default class AwesomeProject extends Component {
constructor(props){
super(props);
this.state = {text: ""}
}
render() {
return (
<View
style={{
flex: 1,
backgroundColor: "#ececec",
flexDirection: "column",
justifyContent: "center",
alignItems: "center"
}}
>
<View style={{ padding: 10, flexDirection: "row" }}>
<TextInput
style={{ flex: 0.8, height: 40, borderWidth: 1 }}
onChangeText={text => this.setState({ text })}
placeholder="Text 1"
value={this.state.text}
/>
</View>
<View style={{ padding: 10, flexDirection: "row" }}>
<TextInput
style={{ flex: 0.8, height: 40, borderWidth: 1 }}
onChangeText={text => this.setState({ text })}
placeholder="Text 2"
value={this.state.text}
/>
</View>
<View style={{ padding: 10, flexDirection: "row" }}>
<Button
onPress={onButtonPress}
title="Press Me"
accessibilityLabel="See an Information"
/>
</View>
</View>
);
}
}
An example with a little less stringified html:
var container = $('#my-container'),
table = $('<table>');
users.forEach(function(user) {
var tr = $('<tr>');
['ID', 'Name', 'Address'].forEach(function(attr) {
tr.append('<td>' + user[attr] + '</td>');
});
table.append(tr);
});
container.append(table);
Text wrapping is not part of SVG1.1, the currently implemented spec. You should rather use HTML via the <foreignObject/>
element.
<svg ...>
<switch>
<foreignObject x="20" y="90" width="150" height="200">
<p xmlns="http://www.w3.org/1999/xhtml">Text goes here</p>
</foreignObject>
<text x="20" y="20">Your SVG viewer cannot display html.</text>
</switch>
</svg>
If you installed postgres from brew, run this in your terminal :
/usr/local/opt/postgres/bin/createuser -s postgres
%
(any host) (see manual for details)The current problem is the first one, but right after you resolve it you will likely get the second one.
When you make a call to using namespace <some_namespace>;
all symbols in that namespace will become visible without adding the namespace prefix. A symbol may be for instance a function, class or a variable.
E.g. if you add using namespace std;
you can write just cout
instead of std::cout
when calling the operator cout
defined in the namespace std
.
This is somewhat dangerous because namespaces are meant to be used to avoid name collisions and by writing using namespace
you spare some code, but loose this advantage. A better alternative is to use just specific symbols thus making them visible without the namespace prefix. Eg:
#include <iostream>
using std::cout;
int main() {
cout << "Hello world!";
return 0;
}
This don't work since Andoid SDK R12 update. I think is because SDK don't find the Java SDK Path. You can solve that by adding the Java SDK Path in your PATH environment variable.
According to the select_list Oracle select documentation the AS is optional.
As a personal note I think it is easier to read with the AS
The const keyword used with the function declaration specifies that it is a const member function and it will not be able to change the data members of the object.
The problem solved when I don't use any declaration like var, let or const
Here is a really simple solution using SASS/SCSS and a math formula style:
/* frame circle */
.container {
position: relative;
border-radius: 50%;
background-color: white;
overflow: hidden;
width: 400px;
height: 400px; }
/* circle sectors */
.menu-frame-sector {
position: absolute;
width: 50%;
height: 50%;
z-index: 10000;
transform-origin: 100% 100%;
}
$sector_count: 8;
$sector_width: 360deg / $sector_count;
.sec0 {
transform: rotate(0 * $sector_width) skew($sector_width);
background-color: red; }
.sec1 {
transform: rotate(1 * $sector_width) skew($sector_width);
background-color: blue; }
.sec2 {
transform: rotate(2 * $sector_width) skew($sector_width);
background-color: red; }
.sec3 {
transform: rotate(3 * $sector_width) skew($sector_width);
background-color: blue; }
.sec4 {
transform: rotate(4 * $sector_width) skew($sector_width);
background-color: red; }
.sec5 {
transform: rotate(5 * $sector_width) skew($sector_width);
background-color: blue; }
.sec6 {
transform: rotate(6 * $sector_width) skew($sector_width);
background-color: red; }
.sec7 {
transform: rotate(7 * $sector_width) skew($sector_width);
background-color: blue; }
To conclude, I strongly suggest you to understand transform-origin
, rotate()
and skew()
:
https://tympanus.net/codrops/2013/08/09/building-a-circular-navigation-with-css-transforms/
I deleted the node_modules folder and run npm install
and my application started without any errors.
Similar to Howard's answer but a bit more efficient:
def my_func(low, up, leng):
step = ((up-low) * 1.0 / leng)
return [low+i*step for i in xrange(leng)]
According to the manual, in CPython id()
is the actual memory address of the variable. If you want it in hex format, call hex()
on it.
x = 5
print hex(id(x))
this will print the memory address of x.
I use this type of decorator in some debugging situations, it allows overriding class properties by decorating, without having to find the calling function.
class myclass(object):
def __init__(self):
self.property = "HELLO"
@adecorator(property="GOODBYE")
def method(self):
print self.property
Here is the decorator code
class adecorator (object):
def __init__ (self, *args, **kwargs):
# store arguments passed to the decorator
self.args = args
self.kwargs = kwargs
def __call__(self, func):
def newf(*args, **kwargs):
#the 'self' for a method function is passed as args[0]
slf = args[0]
# replace and store the attributes
saved = {}
for k,v in self.kwargs.items():
if hasattr(slf, k):
saved[k] = getattr(slf,k)
setattr(slf, k, v)
# call the method
ret = func(*args, **kwargs)
#put things back
for k,v in saved.items():
setattr(slf, k, v)
return ret
newf.__doc__ = func.__doc__
return newf
Note: because I've used a class decorator you'll need to use @adecorator() with the brackets on to decorate functions, even if you don't pass any arguments to the decorator class constructor.
@mikepenz has the right one.
You could just hit SHIFT+COMMAND+A (if you're using OSX and 1.4 android studio) and enter OFFLINE
in the search box.
Then you'll see what mike have shown you.
Just deselect offline
.
I think you will want to use ThreadSafeClientConnManager.
You can see how it works here: http://foo.jasonhudgins.com/2009/08/http-connection-reuse-in-android.html
Or in the AndroidHttpClient
which uses it internally.
Say that you have a list values = [3,6,1,5]
, and need the index of the smallest element, i.e. index_min = 2
in this case.
Avoid the solution with itemgetter()
presented in the other answers, and use instead
index_min = min(range(len(values)), key=values.__getitem__)
because it doesn't require to import operator
nor to use enumerate
, and it is always faster(benchmark below) than a solution using itemgetter()
.
If you are dealing with numpy arrays or can afford numpy
as a dependency, consider also using
import numpy as np
index_min = np.argmin(values)
This will be faster than the first solution even if you apply it to a pure Python list if:
numpy
arrayI have run the benchmark on my machine with python 2.7 for the two solutions above (blue: pure python, first solution) (red, numpy solution) and for the standard solution based on itemgetter()
(black, reference solution).
The same benchmark with python 3.5 showed that the methods compare exactly the same of the python 2.7 case presented above
Accepted answer is wrong. It's pretty easy using scope and references, though it may make Promise purists angry:
const createPromise = () => {
let resolver;
return [
new Promise((resolve, reject) => {
resolver = resolve;
}),
resolver,
];
};
const [ promise, resolver ] = createPromise();
promise.then(value => console.log(value));
setTimeout(() => resolver('foo'), 1000);
We are essentially grabbing the reference to the resolve function when the promise is created, and we return that so it can be set externally.
In one second the console will output:
> foo
I wanted to update slider as well as the inputbox. For me following is working
a.slider('value',1520);
$("#labelAID").val(1520);
where a
is object as following.
var a= $( "<div id='slider' style='width:200px;margin-left:20px;'></div>" ).insertAfter( "#labelAID" ).slider({
min: 0,
max: 2000,
range: "min",
value: 111,
slide: function( event, ui ) {
$("#labelAID").val(ui.value );
}
});
$( "#labelAID" ).keyup(function() {
a.slider( "value",$( "#labelAID" ).val() );
});
It only works if I replace it with another character. It will not simply remove it.
This is because when char
is equal to ""
, char.length
is 0, so your substrings combine to form the original string. Going with your code attempt, the following will work:
String.prototype.replaceAt = function (index, char) {
return this.substr(0, index) + char + this.substr(index + 1);
// this will 'replace' the character at index with char ^
}
The JavaDoc explains it very well:
With this option set to a non-zero timeout, a read() call on the InputStream associated with this Socket will block for only this amount of time. If the timeout expires, a java.net.SocketTimeoutException is raised, though the Socket is still valid. The option must be enabled prior to entering the blocking operation to have effect. The timeout must be > 0. A timeout of zero is interpreted as an infinite timeout.
SO_TIMEOUT
is the timeout that a read()
call will block. If the timeout is reached, a java.net.SocketTimeoutException will be thrown. If you want to block forever put this option to zero (the default value), then the read()
call will block until at least 1 byte could be read.
My answer is superfluous, but if you are OCD, visually oriented and you just have to see that now keyword in your code, use:
date( 'Y-m-d H:i:s', strtotime( 'now' ) );
This is the LRU cache I use, which encapsulates a LinkedHashMap and handles concurrency with a simple synchronize lock guarding the juicy spots. It "touches" elements as they are used so that they become the "freshest" element again, so that it is actually LRU. I also had the requirement of my elements having a minimum lifespan, which you can also think of as "maximum idle time" permitted, then you're up for eviction.
However, I agree with Hank's conclusion and accepted answer -- if I were starting this again today, I'd check out Guava's CacheBuilder
.
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
public class MaxIdleLRUCache<KK, VV> {
final static private int IDEAL_MAX_CACHE_ENTRIES = 128;
public interface DeadElementCallback<KK, VV> {
public void notify(KK key, VV element);
}
private Object lock = new Object();
private long minAge;
private HashMap<KK, Item<VV>> cache;
public MaxIdleLRUCache(long minAgeMilliseconds) {
this(minAgeMilliseconds, IDEAL_MAX_CACHE_ENTRIES);
}
public MaxIdleLRUCache(long minAgeMilliseconds, int idealMaxCacheEntries) {
this(minAgeMilliseconds, idealMaxCacheEntries, null);
}
public MaxIdleLRUCache(long minAgeMilliseconds, int idealMaxCacheEntries, final DeadElementCallback<KK, VV> callback) {
this.minAge = minAgeMilliseconds;
this.cache = new LinkedHashMap<KK, Item<VV>>(IDEAL_MAX_CACHE_ENTRIES + 1, .75F, true) {
private static final long serialVersionUID = 1L;
// This method is called just after a new entry has been added
public boolean removeEldestEntry(Map.Entry<KK, Item<VV>> eldest) {
// let's see if the oldest entry is old enough to be deleted. We don't actually care about the cache size.
long age = System.currentTimeMillis() - eldest.getValue().birth;
if (age > MaxIdleLRUCache.this.minAge) {
if ( callback != null ) {
callback.notify(eldest.getKey(), eldest.getValue().payload);
}
return true; // remove it
}
return false; // don't remove this element
}
};
}
public void put(KK key, VV value) {
synchronized ( lock ) {
// System.out.println("put->"+key+","+value);
cache.put(key, new Item<VV>(value));
}
}
public VV get(KK key) {
synchronized ( lock ) {
// System.out.println("get->"+key);
Item<VV> item = getItem(key);
return item == null ? null : item.payload;
}
}
public VV remove(String key) {
synchronized ( lock ) {
// System.out.println("remove->"+key);
Item<VV> item = cache.remove(key);
if ( item != null ) {
return item.payload;
} else {
return null;
}
}
}
public int size() {
synchronized ( lock ) {
return cache.size();
}
}
private Item<VV> getItem(KK key) {
Item<VV> item = cache.get(key);
if (item == null) {
return null;
}
item.touch(); // idle the item to reset the timeout threshold
return item;
}
private static class Item<T> {
long birth;
T payload;
Item(T payload) {
this.birth = System.currentTimeMillis();
this.payload = payload;
}
public void touch() {
this.birth = System.currentTimeMillis();
}
}
}
or you can simply use
def question_params
params.require(:question).permit(team_ids: [])
end
A simpler solution would be to just add #navigation ul li~li { border-left: 1px solid #857D7A; }
Here's a more terse approach that was introduced in 2012:
myInt = @(myFloat).intValue;
I'm doing the following:
getLocalStorageSizeLimit = function () {
var maxLength = Math.pow(2,24);
var preLength = 0;
var hugeString = "0";
var testString;
var keyName = "testingLengthKey";
//2^24 = 16777216 should be enough to all browsers
testString = (new Array(Math.pow(2, 24))).join("X");
while (maxLength !== preLength) {
try {
localStorage.setItem(keyName, testString);
preLength = testString.length;
maxLength = Math.ceil(preLength + ((hugeString.length - preLength) / 2));
testString = hugeString.substr(0, maxLength);
} catch (e) {
hugeString = testString;
maxLength = Math.floor(testString.length - (testString.length - preLength) / 2);
testString = hugeString.substr(0, maxLength);
}
}
localStorage.removeItem(keyName);
maxLength = JSON.stringify(this.storageObject).length + maxLength + keyName.length - 2;
return maxLength;
};
for swift4:
if obj is MyClass{
// then object type is MyClass Type
}
use split
Split a file into fixed-size pieces, creates output files containing consecutive sections of INPUT (standard input if none is given or INPUT is `-')
Syntax
split [options] [INPUT [PREFIX]]
you can use the below command for reset of single file
git checkout HEAD -- path_to_file/file_name
List all changed files to get path_to_file/filename
with below command
git status
on php: filter_var(gethostbyname($dns), FILTER_VALIDATE_IP) == true ? 'ip' : 'not ip'
A thing you have to understand first: you have no files.
A file is a subject of a filesystem, but you are making your request using HTTP protocol which supports no files but URLs.
So, you have to request an unexisting file using your browser and see the response code. if it's not 404, you are unable to use any wrappers to see if a file exists and you have to request your cdn using some other protocol, FTP for example
In Python 3.8... Preserves primary key and column types.
Takes 3 inputs:
def removeColumns(db_cur, t, columns_to_junk):
# Obtain column information
sql = "PRAGMA table_info(" + t + ")"
record = query(db_cur, sql)
# Initialize two strings: one for column names + column types and one just
# for column names
cols_w_types = "("
cols = ""
# Build the strings, filtering for the column to throw out
for r in record:
if r[1] not in columns_to_junk:
if r[5] == 0:
cols_w_types += r[1] + " " + r[2] + ","
if r[5] == 1:
cols_w_types += r[1] + " " + r[2] + " PRIMARY KEY,"
cols += r[1] + ","
# Cut potentially trailing commas
if cols_w_types[-1] == ",":
cols_w_types = cols_w_types[:-1]
else:
pass
if cols[-1] == ",":
cols = cols[:-1]
else:
pass
# Execute SQL
sql = "CREATE TEMPORARY TABLE xfer " + cols_w_types + ")"
db_cur.execute(sql)
sql = "INSERT INTO xfer SELECT " + cols + " FROM " + t
db_cur.execute(sql)
sql = "DROP TABLE " + t
db_cur.execute(sql)
sql = "CREATE TABLE " + t + cols_w_types + ")"
db_cur.execute(sql)
sql = "INSERT INTO " + t + " SELECT " + cols + " FROM xfer"
db_cur.execute(sql)
You'll find a reference to a query() function. Just a helper...
Takes two inputs:
def query(db_cur, query):
r = db_cur.execute(query).fetchall()
return r
Don't forget to include a "commit()"!
I think you can use Blueprint and that's will make ur code look better and neatly.
example:
from flask import Blueprint
bp = Blueprint(__name__, "example")
@bp.route("/example", methods=["POST"])
def example(self):
print("example")
Somehow, where you are using Sentry, you're not using its Facade, but the class itself. When you call a class through a Facade you're not really using statics, it's just looks like you are.
Do you have this:
use Cartalyst\Sentry\Sentry;
In your code?
Ok, but if this line is working for you:
$user = $this->sentry->register(array( 'username' => e($data['username']), 'email' => e($data['email']), 'password' => e($data['password']) ));
So you already have it instantiated and you can surely do:
$adminGroup = $this->sentry->findGroupById(5);
I think something like this:
btn.BackgroundImage = Properties.Resources.*Image_Identifier*;
Where *Image_Identifier*
is an identifier of the image in your resources.
If you are using Mac OS X, I would recommend you get Tower, it's a wonderful program that has made dealing with Git a pleasure for me. I now longer have to remember terminal commands and it offers a great GUI to view, track and solve differences in files.
And no, I'm not affiliated with them, I just use their software and really like it.
As of July, 2020 the following dependencies in pom.xml worked for me:
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest</artifactId>
<version>2.1</version>
</dependency>
With this 4.13 junit library and hamcrest, it uses hamcrest.MatcherAssert when asserting and throws exception- enter image description here
Please find the simple solution to convete Date & Time Format in Go Lang. Please find the example below.
Package Link: https://github.com/vigneshuvi/GoDateFormat.
Please find the plackholders:https://medium.com/@Martynas/formatting-date-and-time-in-golang-5816112bf098
package main
// Import Package
import (
"fmt"
"time"
"github.com/vigneshuvi/GoDateFormat"
)
func main() {
fmt.Println("Go Date Format(Today - 'yyyy-MM-dd HH:mm:ss Z'): ", GetToday(GoDateFormat.ConvertFormat("yyyy-MM-dd HH:mm:ss Z")))
fmt.Println("Go Date Format(Today - 'yyyy-MMM-dd'): ", GetToday(GoDateFormat.ConvertFormat("yyyy-MMM-dd")))
fmt.Println("Go Time Format(NOW - 'HH:MM:SS'): ", GetToday(GoDateFormat.ConvertFormat("HH:MM:SS")))
fmt.Println("Go Time Format(NOW - 'HH:MM:SS tt'): ", GetToday(GoDateFormat.ConvertFormat("HH:MM:SS tt")))
}
func GetToday(format string) (todayString string){
today := time.Now()
todayString = today.Format(format);
return
}
It's simple-
SELECT empname,
empid,
(SELECT COUNT (profileid)
FROM profile
WHERE profile.empid = employee.empid)
AS number_of_profiles
FROM employee;
It is even simpler when you use a table join like this:
SELECT e.empname, e.empid, COUNT (p.profileid) AS number_of_profiles
FROM employee e LEFT JOIN profile p ON e.empid = p.empid
GROUP BY e.empname, e.empid;
Explanation for the subquery:
Essentially, a subquery in a select
gets a scalar value and passes it to the main query. A subquery in select
is not allowed to pass more than one row and more than one column, which is a restriction. Here, we are passing a count
to the main query, which, as we know, would always be only a number- a scalar value. If a value is not found, the subquery returns null
to the main query. Moreover, a subquery can access columns from the from
clause of the main query, as shown in my query where employee.empid
is passed from the outer query to the inner query.
Edit:
When you use a subquery in a select
clause, Oracle essentially treats it as a left join (you can see this in the explain plan for your query), with the cardinality of the rows being just one on the right for every row in the left.
Explanation for the left join
A left join is very handy, especially when you want to replace the select
subquery due to its restrictions. There are no restrictions here on the number of rows of the tables in either side of the LEFT JOIN
keyword.
For more information read Oracle Docs on subqueries and left join or left outer join.
One more reason for this error (assuming that gradle properly setup) is incompatibility between andorid.gradle tools and gradle itself - check out this answer for the complete compatibility table.
In my case the error was the same as in the question and the stacktrace as following:
java.lang.NullPointerException
at java.util.Objects.requireNonNull(Objects.java:203)
at com.android.build.gradle.BasePlugin.lambda$configureProject$1(BasePlugin.java:436)
at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
...
I've fixed that by upgrading com.android.tools.build:gradle
to the current latest 3.1.4
buildscript {
repositories {
...
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.4'
}
}
Gradle version is 4.6
As mentioned here, you might need to disable the loopback
Loopback check can be removed by adding a registry entry as follows: