From Evans DDD:
An AGGREGATE is a cluster of associated objects that we treat as a unit for the purpose of data changes. Each AGGREGATE has a root and a boundary. The boundary defines what is inside the AGGREGATE. The root is a single, specific ENTITY contained in the AGGREGATE.
And:
The root is the only member of the AGGREGATE that outside objects are allowed to hold references to[.]
This means that aggregate roots are the only objects that can be loaded from a repository.
An example is a model containing a Customer
entity and an Address
entity. We would never access an Address
entity directly from the model as it does not make sense without the context of an associated Customer
. So we could say that Customer
and Address
together form an aggregate and that Customer
is an aggregate root.
You can do it like this and you mod function will work perfect let me know if you want a code pen
<div ng-repeat="icon in icons">
<div class="row" ng-if="$index % 3 == 0 ">
<i class="col col-33 {{icons[$index + n].icon}} custom-icon"></i>
<i class="col col-33 {{icons[$index + n + 1].icon}} custom-icon"></i>
<i class="col col-33 {{icons[$index + n + 2].icon}} custom-icon"></i>
</div>
</div>
I had a similar error but not from a Conversion...
System.Web.HttpException: 'Namespace.Website.MasterUserPages' is not allowed here because it does not extend class 'System.Web.UI.MasterPage'
I was also extending the MasterPage class.
The error was due to a simple compilation error in my Master Page itself:
System.Web.HttpCompileException: c:\directory\path\Website\MasterUserPages.Master(30): error CS1061: 'ASP.masteruserpages_master' does not contain a definition for 'btnHelp_Click' and no extension method 'btnHelp_Click' accepting a first argument of type 'ASP.masteruserpages_master' could be found (are you missing a using directive or an assembly reference?)
I was not able to see the error until I moved the MasterPage to the root website folder. Once that was taken care of I was able to put my MasterPage back in the folder I wanted.
If you use VS 2013 Update 5, you should manually install an update 2.8.7 for NuGet Packet Manager.
The bug report has more details.
Maybe a simple bank situation.
class Account {
double balance;
void withdraw(double amount){
balance -= amount;
}
void deposit(double amount){
balance += amount;
}
void transfer(Account from, Account to, double amount){
sync(from);
sync(to);
from.withdraw(amount);
to.deposit(amount);
release(to);
release(from);
}
}
Obviously, should there be two threads which attempt to run transfer(a, b) and transfer(b, a) at the same time, then a deadlock is going to occur because they try to acquire the resources in reverse order.
This code is also great for looking at solutions to the deadlock as well. Hope this helps!
In the sample, we are creating two datetime objects, one with current time and another one with 75 seconds added to the current time. Then we will call the method .Subtract() on the second DateTime object. This will return a TimeSpan object. Once we get the TimeSpan object, we can use the properties of TimeSpan to get the actual Hours, Minutes and Seconds.
DateTime startTime = DateTime.Now;
DateTime endTime = DateTime.Now.AddSeconds( 75 );
TimeSpan span = endTime.Subtract ( startTime );
Console.WriteLine( "Time Difference (seconds): " + span.Seconds );
Console.WriteLine( "Time Difference (minutes): " + span.Minutes );
Console.WriteLine( "Time Difference (hours): " + span.Hours );
Console.WriteLine( "Time Difference (days): " + span.Days );
Result:
Time Difference (seconds): 15
Time Difference (minutes): 1
Time Difference (hours): 0
Time Difference (days): 0
To sure, you should use function to check is null and empty as below:
string str = ...
if (!String.IsNullOrEmpty(str))
{
...
}
Here are some common datatypes I use (I am not much of a pro though):
| Column | Data type | Note
| ---------------- | ------------- | -------------------------------------
| id | INTEGER | AUTO_INCREMENT, UNSIGNED |
| uuid | CHAR(36) | or CHAR(16) binary |
| title | VARCHAR(255) | |
| full name | VARCHAR(70) | |
| gender | TINYINT | UNSIGNED |
| description | TINYTEXT | often may not be enough, use TEXT
instead
| post body | TEXT | |
| email | VARCHAR(255) | |
| url | VARCHAR(2083) | MySQL version < 5.0.3 - use TEXT |
| salt | CHAR(x) | randomly generated string, usually of
fixed length (x)
| digest (md5) | CHAR(32) | |
| phone number | VARCHAR(20) | |
| US zip code | CHAR(5) | Use CHAR(10) if you store extended
codes
| US/Canada p.code | CHAR(6) | |
| file path | VARCHAR(255) | |
| 5-star rating | DECIMAL(3,2) | UNSIGNED |
| price | DECIMAL(10,2) | UNSIGNED |
| date (creation) | DATE/DATETIME | usually displayed as initial date of
a post |
| date (tracking) | TIMESTAMP | can be used for tracking changes in a
post |
| tags, categories | TINYTEXT | comma separated values * |
| status | TINYINT(1) | 1 – published, 0 – unpublished, … You
can also use ENUM for human-readable
values
| json data | JSON | or LONGTEXT
I hope this will help reloading/refreshing directive on value from parent scope
<html>
<head>
<!-- version 1.4.5 -->
<script src="angular.js"></script>
</head>
<body ng-app="app" ng-controller="Ctrl">
<my-test reload-on="update"></my-test><br>
<button ng-click="update = update+1;">update {{update}}</button>
</body>
<script>
var app = angular.module('app', [])
app.controller('Ctrl', function($scope) {
$scope.update = 0;
});
app.directive('myTest', function() {
return {
restrict: 'AE',
scope: {
reloadOn: '='
},
controller: function($scope) {
$scope.$watch('reloadOn', function(newVal, oldVal) {
// all directive code here
console.log("Reloaded successfully......" + $scope.reloadOn);
});
},
template: '<span> {{reloadOn}} </span>'
}
});
</script>
</html>
long
can only take string convertibles which can end in a base 10 numeral. So, the decimal is causing the harm. What you can do is, float
the value before calling the long
. If your program is on Python 2.x where int and long difference matters, and you are sure you are not using large integers, you could have just been fine with using int
to provide the key as well.
So, the answer is long(float('234.89'))
or it could just be int(float('234.89'))
if you are not using large integers. Also note that this difference does not arise in Python 3, because int is upgraded to long by default. All integers are long in python3 and call to covert is just int
If you want the logo to take space, you are probably better of floating it left and then moving down the content using margin, sort of like this:
#logo { float: left; margin: 0 10px 10px 20px; } #content { margin: 10px 0 0 10px; }
or whatever margin you want.
I took the Ned Rockson's version and adjusted it to allow upwards scrolls as well.
var smoothScroll = function(elementId) {
var MIN_PIXELS_PER_STEP = 16;
var MAX_SCROLL_STEPS = 30;
var target = document.getElementById(elementId);
var scrollContainer = target;
do {
scrollContainer = scrollContainer.parentNode;
if (!scrollContainer) return;
scrollContainer.scrollTop += 1;
} while (scrollContainer.scrollTop === 0);
var targetY = 0;
do {
if (target === scrollContainer) break;
targetY += target.offsetTop;
} while (target = target.offsetParent);
var pixelsPerStep = Math.max(MIN_PIXELS_PER_STEP,
Math.abs(targetY - scrollContainer.scrollTop) / MAX_SCROLL_STEPS);
var isUp = targetY < scrollContainer.scrollTop;
var stepFunc = function() {
if (isUp) {
scrollContainer.scrollTop = Math.max(targetY, scrollContainer.scrollTop - pixelsPerStep);
if (scrollContainer.scrollTop <= targetY) {
return;
}
} else {
scrollContainer.scrollTop = Math.min(targetY, scrollContainer.scrollTop + pixelsPerStep);
if (scrollContainer.scrollTop >= targetY) {
return;
}
}
window.requestAnimationFrame(stepFunc);
};
window.requestAnimationFrame(stepFunc);
};
To my knowledge there is no cross-browser compatible way to make a circle with CSS & HTML only.
For the square I guess you could make a div with a border and a z-index higher than what you are putting it over. I don't understand why you would need to do this, when you could just put a border on the image or "something" itself.
If anyone else knows how to make a circle that is cross browser compatible with CSS & HTML only, I would love to hear about it!
@Caspar Kleijne border-radius does not work in IE8 or below, not sure about 9.
Oddly it looks like the other two answers don't spell it out, and it's definitely worth saying:
i++
means 'tell me the value of i
, then increment'
++i
means 'increment i
, then tell me the value'
They are Pre-increment, post-increment operators. In both cases the variable is incremented, but if you were to take the value of both expressions in exactly the same cases, the result will differ.
First check the version of Python
For python2:
sudo apt-get install python-matplotlib
For python3:
sudo apt-get install python3-matplotlib
If you mismatch the Matplotlib installation and the Python version you will get the no-module-error because no module for that version exits.
for…in
iterates over property names, not values, and does so in an unspecified order (yes, even after ES6). You shouldn’t use it to iterate over arrays. For them, there’s ES5’s forEach
method that passes both the value and the index to the function you give it:
var myArray = [123, 15, 187, 32];
myArray.forEach(function (value, i) {
console.log('%d: %s', i, value);
});
// Outputs:
// 0: 123
// 1: 15
// 2: 187
// 3: 32
Or ES6’s Array.prototype.entries
, which now has support across current browser versions:
for (const [i, value] of myArray.entries()) {
console.log('%d: %s', i, value);
}
For iterables in general (where you would use a for…of
loop rather than a for…in
), there’s nothing built-in, however:
function* enumerate(iterable) {
let i = 0;
for (const x of iterable) {
yield [i, x];
i++;
}
}
for (const [i, obj] of enumerate(myArray)) {
console.log(i, obj);
}
If you actually did mean for…in
– enumerating properties – you would need an additional counter. Object.keys(obj).forEach
could work, but it only includes own properties; for…in
includes enumerable properties anywhere on the prototype chain.
you should use "append" mode redirection >>
instead of >
SLEEP 5
was included in some of the Windows Resource Kits.
TIMEOUT 5
was included in some of the Windows Resource Kits, but is now a standard command in Windows 7 and 8 (not sure about Vista).
PING 1.1.1.1 -n 1 -w 5000 >NUL
For any MS-DOS or Windows version with a TCP/IP client, PING can be used to delay execution for a number of seconds.
NETSH badcommand
(Windows XP/Server 2003 only) or CHOICE
EDIT:
So which am I supposed to use? The proper 4 letter extension suggested by the creator, or the 3 letter extension found in the wild west of the internet?
This question could be:
A request for advice; or
A natural expression of that particular emotion which is experienced, while one is observing that some official recommendation is being disregarded—prominently, or even predominantly.
People differ in their predilection for following:
Official advice; or
The preponderance of practice.
Of course, I am unlikely to influence you, regarding which of these two paths you prefer to take!
In what follows (and, in the spirit of science), I merely make an hypothesis, about what (merely as a matter of fact) led the majority of people to use the 3-letter extension. And, I focus on efficient causes.
By this, I do not intend moral exhortation. As you may recall, the fact that something is, does not imply that it should be.
Whatever your personal inclination, be it to follow one path or the other, I do not object.
(End of edit.)
The suggestion, that this preference (in real life usage) was caused by a 8.3 character DOS-ish limitation, IMO is a red herring (erroneous and misleading).
As of August, 2016, the Google search counts for YML and YAML were approximately 6,000,000 and 4,100,000 (to two digits of precision). Furthermore, the "YAML" count was unfairly high because it included mention of the language by name, beyond its use as an extension.
As of July, 2018, the Google's search counts for YML and YAML were approximately 8,100,000 and 4,100,000 (again, to two digits of precision). So, in the last two years, YML has essentially doubled in popularity, but YAML has stayed the same.
Another cultural measure is websites which attempt to explain file extensions. For example, on the FilExt website (as of July, 2018), the page for YAML results in: "Ooops! The FILEXT.com database does not have any information on file extension .YAML."
Whereas, it has an entry for YML, which gives: "YAML...uses a text file and organizes it into a format which is Human-readable. 'database.yml' is a typical example when YAML is used by Ruby on Rails to connect to a database."
As of November, 2014, Wikipedia's article on extension YML still stated that ".yml" is "the file extension for the YAML file format" (emphasis added). Its YAML article lists both extensions, without expressing a preference.
The extension ".yml" is sufficiently clear, is more brief (thus easier to type and recognize), and is much more common.
Of course, both of these extensions could be viewed as abbreviations of a long, possible extension, ".yamlaintmarkuplanguage". But programmers (and users) don't want to type all of that!
Instead, we programmers (and users) want to type as little as possible, and still yet be unambiguous and clear. And we want to see what kind of file it is, as quickly as possible, without reading a longer word. Typing just how many characters accomplishes both of these goals? Isn't the answer three (3)? In other words, YML?
Wikipedia's Category:Filename_extensions page lists entries for .a, .o and .Z. Somehow, it missed .c and .h (used by the C language). These example single-letter extensions help us to see that extensions should be as long as necessary, but no longer (to half-quote Albert Einstein).
Instead, notice that, in general, few extensions start with "Y". Commonly, on the other hand, the letter X is used for a great variety of meanings including "cross," "extensible," "extreme," "variable," etc. (e.g. in XML). So starting with "Y" already conveys much information (in terms of information theory), whereas starting with "X" does not.
Linguistically speaking, therefore, the acronym "XML" has (in a way) only two informative letters ("M" and "L"). "YML", instead, has three informative letters ("M", "L" and "Y"). Indeed, the existing set of acronyms beginning with Y seems extremely small. By implication, this is why a four letter YAML file extension feels greatly overspecified.
Perhaps this is why we see in practice that the "linguistic" pressure (in natural use) to lengthen the abbreviation in question to four (4) characters is weak, and the "linguistic" pressure to shorten this abbreviation to three (3) characters is strong.
Purely as a result, probably, of these factors (and not as an official endorsement), I would note that the YAML.org website's latest news item (from November, 2011) is all about a project written in JavaScript, JS-YAML, which, itself, internally prefers to use the extension ".yml".
The above-mentioned factors may have been the main ones; nevertheless, all the factors (known or unknown) have resulted in the abbreviated, three (3) character extension becoming the one in predominant use for YAML—despite the inventors' preference.
".YML" seems to be the de facto standard. Yet the same inventors were perceptive and correct, about the world's need for a human-readable data language. And we should thank them for providing it.
Just to add another set of answers:
I was having the same problem here. Found out that the problem was with an Advanced Property of the file. There is there an option with the name 'Compilation Action' (may be not with the exact words, I am translating - my VS is in Portuguese).
My Class1.cs file was there as "Content" and I just had to change it to "Compile" to make it work, and have the classes recognized by the others files in the same project.
The easiest way is obviously as described in the MSDN article Share your code with Visual Studio 2017 and VSTS Git.
Create a new local Git repository for your project by selecting Add to Source Control in the status bar in the lower right hand corner of Visual Studio. This will create a new repository in the folder the solution is in and commit your code into that repository.
In the Push view in Team Explorer, select the Publish Git Repository button under Push to Visual Studio Team Services.
Connect Remote Source Control and enter your repository name and select Publish Repository.
I like to used this method the most, it will auto select the first column to the last column being used. However, if the last cell in the first row or the last cell in the first column are empty, this code will not calculate properly. Check the link for other methods to dynamically select cell range.
Sub DynamicRange()
'Best used when first column has value on last row and first row has a value in the last column
Dim sht As Worksheet
Dim LastRow As Long
Dim LastColumn As Long
Dim StartCell As Range
Set sht = Worksheets("Sheet1")
Set StartCell = Range("A1")
'Find Last Row and Column
LastRow = sht.Cells(sht.Rows.Count, StartCell.Column).End(xlUp).Row
LastColumn = sht.Cells(StartCell.Row, sht.Columns.Count).End(xlToLeft).Column
'Select Range
sht.Range(StartCell, sht.Cells(LastRow, LastColumn)).Select
End Sub
You can use NumericUpDown control for WPF written by me as a part of WPFControls library.
Please note that PrimeFaces supports the standard JSF 2.0+ keywords:
@this
Current component.@all
Whole view.@form
Closest ancestor form of current component.@none
No component.and the standard JSF 2.3+ keywords:
@child(n)
nth child.@composite
Closest composite component ancestor.@id(id)
Used to search components by their id ignoring the component tree structure and naming containers.@namingcontainer
Closest ancestor naming container of current component.@parent
Parent of the current component.@previous
Previous sibling.@next
Next sibling.@root
UIViewRoot instance of the view, can be used to start searching from the root instead the current component.But, it also comes with some PrimeFaces specific keywords:
@row(n)
nth row.@widgetVar(name)
Component with given widgetVar.And you can even use something called "PrimeFaces Selectors" which allows you to use jQuery Selector API. For example to process all inputs in a element with the CSS class myClass
:
process="@(.myClass :input)"
See:
Integer has no method length. Try string
var testvar={};
testvar[1]="2";
alert(testvar[1].length);
First save your program file type as "example.py then run your code its working fine.
You can use a fantastic library name Videojs. You will find more useful informations here. But with quick start you can do something like this:
<link href="//vjs.zencdn.net/5.11/video-js.min.css" rel="stylesheet">
<script src="//vjs.zencdn.net/5.11/video.min.js"></script>
<video
id="Video"
class="video-js vjs-default-skin vjs-big-play-centered"
controls
preload="none"
width="auto"
height="auto"
poster="poster.jpg"
data-setup='{"techOrder": ["flash", "html5", "other supported tech"], "nativeControlsForTouch": true, "controlBar": { "muteToggle": false, "volumeControl": false, "timeDivider": false, "durationDisplay": false, "progressControl": false } }'
>
<source src="rtmp://{domain_server}/{publisher}" type='rtmp/mp4'/>
</video>
<script>
var player = videojs('Video');
player.play();
</script>
i will get my answer as follow:
import java.io.IOException;
import java.io.Writer;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
public class findclass {
public static void main(String[] args) throws Exception, IllegalAccessException {
new findclass().findclass(new Object(), "objectName");
new findclass().findclass(1213, "int");
new findclass().findclass("ssdfs", "String");
}
public Map<String, String>map=new HashMap<String, String>();
public void findclass(Object c,String name) throws IllegalArgumentException, IllegalAccessException {
if(map.containsKey(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()))){
System.out.println(c.getClass().getSimpleName()+" "+name+" = "+map.get(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()))+" = "+c);
return;}
map.put(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()), name);
Class te=c.getClass();
if(te.equals(Integer.class)||te.equals(Double.class)||te.equals(Float.class)||te.equals(Boolean.class)||te.equals(Byte.class)||te.equals(Long.class)||te.equals(String.class)||te.equals(Character.class)){
System.out.println(c.getClass().getSimpleName()+" "+name+" = "+c);
return;
}
if(te.isArray()){
if(te==int[].class||te==char[].class||te==double[].class||te==float[].class||te==byte[].class||te==long[].class||te==boolean[].class){
boolean dotflag=true;
for (int i = 0; i < Array.getLength(c); i++) {
System.out.println(Array.get(c, i).getClass().getSimpleName()+" "+name+"["+i+"] = "+Array.get(c, i));
}
return;
}
Object[]arr=(Object[])c;
for (Object object : arr) {
if(object==null)
System.out.println(c.getClass().getSimpleName()+" "+name+" = null");
else {
findclass(object, name+"."+object.getClass().getSimpleName());
}
}
}
Field[] fields=c.getClass().getDeclaredFields();
for (Field field : fields) {
field.setAccessible(true);
if(field.get(c)==null){
System.out.println(field.getType().getSimpleName()+" "+name+"."+field.getName()+" = null");
continue;
}
findclass(field.get(c),name+"."+field.getName());
}
if(te.getSuperclass()==Number.class||te.getSuperclass()==Object.class||te.getSuperclass()==null)
return;
Field[]faFields=c.getClass().getSuperclass().getDeclaredFields();
for (Field field : faFields) {
field.setAccessible(true);
if(field.get(c)==null){
System.out.println(field.getType().getSimpleName()+" "+name+"<"+c.getClass().getSuperclass().getSimpleName()+"."+field.getName()+" = null");
continue;
}
Object check=field.get(c);
findclass(field.get(c),name+"<"+c.getClass().getSuperclass().getSimpleName()+"."+field.getName());
}
}
public void findclass(Object c,String name,Writer writer) throws IllegalArgumentException, IllegalAccessException, IOException {
if(map.containsKey(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()))){
writer.append(c.getClass().getSimpleName()+" "+name+" = "+map.get(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()))+" = "+c+"\n");
return;}
map.put(c.getClass().getName() + "@" + Integer.toHexString(c.hashCode()), name);
Class te=c.getClass();
if(te.equals(Integer.class)||te.equals(Double.class)||te.equals(Float.class)||te.equals(Boolean.class)||te.equals(Byte.class)||te.equals(Long.class)||te.equals(String.class)||te.equals(Character.class)){
writer.append(c.getClass().getSimpleName()+" "+name+" = "+c+"\n");
return;
}
if(te.isArray()){
if(te==int[].class||te==char[].class||te==double[].class||te==float[].class||te==byte[].class||te==long[].class||te==boolean[].class){
boolean dotflag=true;
for (int i = 0; i < Array.getLength(c); i++) {
writer.append(Array.get(c, i).getClass().getSimpleName()+" "+name+"["+i+"] = "+Array.get(c, i)+"\n");
}
return;
}
Object[]arr=(Object[])c;
for (Object object : arr) {
if(object==null){
writer.append(c.getClass().getSimpleName()+" "+name+" = null"+"\n");
}else {
findclass(object, name+"."+object.getClass().getSimpleName(),writer);
}
}
}
Field[] fields=c.getClass().getDeclaredFields();
for (Field field : fields) {
field.setAccessible(true);
if(field.get(c)==null){
writer.append(field.getType().getSimpleName()+" "+name+"."+field.getName()+" = null"+"\n");
continue;
}
findclass(field.get(c),name+"."+field.getName(),writer);
}
if(te.getSuperclass()==Number.class||te.getSuperclass()==Object.class||te.getSuperclass()==null)
return;
Field[]faFields=c.getClass().getSuperclass().getDeclaredFields();
for (Field field : faFields) {
field.setAccessible(true);
if(field.get(c)==null){
writer.append(field.getType().getSimpleName()+" "+name+"<"+c.getClass().getSuperclass().getSimpleName()+"."+field.getName()+" = null"+"\n");
continue;
}
Object check=field.get(c);
findclass(field.get(c),name+"<"+c.getClass().getSuperclass().getSimpleName()+"."+field.getName(),writer);
}
}
}
Understanding how to access multi-indexed pandas DataFrame can help you with all kinds of task like that.
Copy paste this in your code to generate example:
# hierarchical indices and columns
index = pd.MultiIndex.from_product([[2013, 2014], [1, 2]],
names=['year', 'visit'])
columns = pd.MultiIndex.from_product([['Bob', 'Guido', 'Sue'], ['HR', 'Temp']],
names=['subject', 'type'])
# mock some data
data = np.round(np.random.randn(4, 6), 1)
data[:, ::2] *= 10
data += 37
# create the DataFrame
health_data = pd.DataFrame(data, index=index, columns=columns)
health_data
Will give you table like this:
Standard access by column
health_data['Bob']
type HR Temp
year visit
2013 1 22.0 38.6
2 52.0 38.3
2014 1 30.0 38.9
2 31.0 37.3
health_data['Bob']['HR']
year visit
2013 1 22.0
2 52.0
2014 1 30.0
2 31.0
Name: HR, dtype: float64
# filtering by column/subcolumn - your case:
health_data['Bob']['HR']==22
year visit
2013 1 True
2 False
2014 1 False
2 False
health_data['Bob']['HR'][2013]
visit
1 22.0
2 52.0
Name: HR, dtype: float64
health_data['Bob']['HR'][2013][1]
22.0
Access by row
health_data.loc[2013]
subject Bob Guido Sue
type HR Temp HR Temp HR Temp
visit
1 22.0 38.6 40.0 38.9 53.0 37.5
2 52.0 38.3 42.0 34.6 30.0 37.7
health_data.loc[2013,1]
subject type
Bob HR 22.0
Temp 38.6
Guido HR 40.0
Temp 38.9
Sue HR 53.0
Temp 37.5
Name: (2013, 1), dtype: float64
health_data.loc[2013,1]['Bob']
type
HR 22.0
Temp 38.6
Name: (2013, 1), dtype: float64
health_data.loc[2013,1]['Bob']['HR']
22.0
Slicing multi-index
idx=pd.IndexSlice
health_data.loc[idx[:,1], idx[:,'HR']]
subject Bob Guido Sue
type HR HR HR
year visit
2013 1 22.0 40.0 53.0
2014 1 30.0 52.0 45.0
EDIT 2
After three months we can say: no more official Google Apps in Genymotion and CyanogenMod-like method is only way to get Google Apps. However, you can still use the previous project of the Genymotion team: AndroVM (download mirror).
EDIT
Google apps will be removed from Genymotion in November. You can find more information on the Genymotion Google Plus page.
Choose virtual device with Google Apps:
Done:
HTML code
<div ng-app>
<div ng-controller='ctrl'>
<div ng-class='whatClassIsIt(call.state[0])'>{{call.state[0]}}</div>
<div ng-class='whatClassIsIt(call.state[1])'>{{call.state[1]}}</div>
<div ng-class='whatClassIsIt(call.state[2])'>{{call.state[2]}}</div>
<div ng-class='whatClassIsIt(call.state[3])'>{{call.state[3]}}</div>
<div ng-class='whatClassIsIt(call.state[4])'>{{call.state[4]}}</div>
<div ng-class='whatClassIsIt(call.state[5])'>{{call.state[5]}}</div>
<div ng-class='whatClassIsIt(call.state[6])'>{{call.state[6]}}</div>
<div ng-class='whatClassIsIt(call.state[7])'>{{call.state[7]}}</div>
</div>
JavaScript Code
function ctrl($scope){
$scope.call={state:['second','first','nothing','Never', 'Gonna', 'Give', 'You', 'Up']}
$scope.whatClassIsIt= function(someValue){
if(someValue=="first")
return "ClassA"
else if(someValue=="second")
return "ClassB";
else
return "ClassC";
}
}
try this one :),
Get-LocalGroup | %{ $groups = "$(Get-LocalGroupMember -Group $_.Name | %{ $_.Name } | Out-String)"; Write-Output "$($_.Name)>`r`n$($groups)`r`n" }
Try using:
console.log($("#"+d));
This will remove the extra quotes you were using.
Field[] fields = YourClassName.class.getFields();
returns an array of all public variables of the class.
getFields()
return the fields in the whole class-heirarcy. If you want to have the fields defined only in the class in question, and not its superclasses, use getDeclaredFields()
, and filter the public
ones with the following Modifier
approach:
Modifier.isPublic(field.getModifiers());
The YourClassName.class
literal actually represents an object of type java.lang.Class
. Check its docs for more interesting reflection methods.
The Field
class above is java.lang.reflect.Field
. You may take a look at the whole java.lang.reflect
package.
ngOnInit()
is called right after the directive's data-bound properties have been checked for the first time, and before any of its children have been checked. It is invoked only once when the directive is instantiated.
ngAfterViewInit()
is called after a component's view, and its children's views, are created. Its a lifecycle hook that is called after a component's view has been fully initialized.
View model is same as your datamodel but you can add 2 or more data model classes in it. According to that you have to change your controller to take 2 models at once
All the above solutions are hacky and buggy. Don't even try. Use other libs. The best I have found - http://sachinchoolur.github.io/lightslider Works great with bootstrap, does not add junk html, highly-configurable, responsive, mobile-friendly etc...
$('.multi-item-carousel').lightSlider({
item: 4,
pager: false,
autoWidth: false,
slideMargin: 0
});
Yes you can. However, it depends on the C-library that you are linking against and you need to be aware of the consequences.
Since you are programming for embedded applications, realise that floating-point support is emulated for a lot of embedded architectures. Compiling in this floating-point support will end up increasing the size of your executable significantly.
problem is, it is not converted to proper format. Use function "printPreview(binaryPDFData)" to get print preview dialog of binary pdf data. you can comment script part if you don't want print dialog open.
printPreview = (data, type = 'application/pdf') => {
let blob = null;
blob = this.b64toBlob(data, type);
const blobURL = URL.createObjectURL(blob);
const theWindow = window.open(blobURL);
const theDoc = theWindow.document;
const theScript = document.createElement('script');
function injectThis() {
window.print();
}
theScript.innerHTML = `window.onload = ${injectThis.toString()};`;
theDoc.body.appendChild(theScript);
};
b64toBlob = (content, contentType) => {
contentType = contentType || '';
const sliceSize = 512;
// method which converts base64 to binary
const byteCharacters = window.atob(content);
const byteArrays = [];
for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
const slice = byteCharacters.slice(offset, offset + sliceSize);
const byteNumbers = new Array(slice.length);
for (let i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
const blob = new Blob(byteArrays, {
type: contentType
}); // statement which creates the blob
return blob;
};
If you define operator<<
as a member function it will have a different decomposed syntax than if you used a non-member operator<<
. A non-member operator<<
is a binary operator, where a member operator<<
is a unary operator.
// Declarations
struct MyObj;
std::ostream& operator<<(std::ostream& os, const MyObj& myObj);
struct MyObj
{
// This is a member unary-operator, hence one argument
MyObj& operator<<(std::ostream& os) { os << *this; return *this; }
int value = 8;
};
// This is a non-member binary-operator, 2 arguments
std::ostream& operator<<(std::ostream& os, const MyObj& myObj)
{
return os << myObj.value;
}
So.... how do you really call them? Operators are odd in some ways, I'll challenge you to write the operator<<(...)
syntax in your head to make things make sense.
MyObj mo;
// Calling the unary operator
mo << std::cout;
// which decomposes to...
mo.operator<<(std::cout);
Or you could attempt to call the non-member binary operator:
MyObj mo;
// Calling the binary operator
std::cout << mo;
// which decomposes to...
operator<<(std::cout, mo);
You have no obligation to make these operators behave intuitively when you make them into member functions, you could define operator<<(int)
to left shift some member variable if you wanted to, understand that people may be a bit caught off guard, no matter how many comments you may write.
Almost lastly, there may be times where both decompositions for an operator call are valid, you may get into trouble here and we'll defer that conversation.
Lastly, note how odd it might be to write a unary member operator that is supposed to look like a binary operator (as you can make member operators virtual..... also attempting to not devolve and run down this path....)
struct MyObj
{
// Note that we now return the ostream
std::ostream& operator<<(std::ostream& os) { os << *this; return os; }
int value = 8;
};
This syntax will irritate many coders now....
MyObj mo;
mo << std::cout << "Words words words";
// this decomposes to...
mo.operator<<(std::cout) << "Words words words";
// ... or even further ...
operator<<(mo.operator<<(std::cout), "Words words words");
Note how the cout
is the second argument in the chain here.... odd right?
Unfortunately std::map::operator[]
is a non-const member function, and you have a const reference.
You either need to change the signature of function
or do:
MAP::const_iterator pos = map.find("string");
if (pos == map.end()) {
//handle the error
} else {
std::string value = pos->second;
...
}
operator[]
handles the error by adding a default-constructed value to the map and returning a reference to it. This is no use when all you have is a const reference, so you will need to do something different.
You could ignore the possibility and write string value = map.find("string")->second;
, if your program logic somehow guarantees that "string"
is already a key. The obvious problem is that if you're wrong then you get undefined behavior.
It looks like most of post here described what you need here. However - something you might need more complex behavior - depending on what you're parsing. In your case it might be so that you won't need more complex parsing - but it depends what information you're extracting.
You can use regex groups as field name in class, after which could be written for example like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text.RegularExpressions;
public class Info
{
public String Identifier;
public char nextChar;
};
class testRegex {
const string input = "Lorem ipsum dolor sit %download%#456 amet, consectetur adipiscing %download%#3434 elit. " +
"Duis non nunc nec mauris feugiat porttitor. Sed tincidunt blandit dui a viverra%download%#298. Aenean dapibus nisl %download%#893434 id nibh auctor vel tempor velit blandit.";
static void Main(string[] args)
{
Regex regex = new Regex(@"%download%#(?<Identifier>[0-9]*)(?<nextChar>.)(?<thisCharIsNotNeeded>.)");
List<Info> infos = new List<Info>();
foreach (Match match in regex.Matches(input))
{
Info info = new Info();
for( int i = 1; i < regex.GetGroupNames().Length; i++ )
{
String groupName = regex.GetGroupNames()[i];
FieldInfo fi = info.GetType().GetField(regex.GetGroupNames()[i]);
if( fi != null ) // Field is non-public or does not exists.
fi.SetValue( info, Convert.ChangeType( match.Groups[groupName].Value, fi.FieldType));
}
infos.Add(info);
}
foreach ( var info in infos )
{
Console.WriteLine(info.Identifier + " followed by '" + info.nextChar.ToString() + "'");
}
}
};
This mechanism uses C# reflection to set value to class. group name is matched against field name in class instance. Please note that Convert.ChangeType won't accept any kind of garbage.
If you want to add tracking of line / column - you can add extra Regex split for lines, but in order to keep for loop intact - all match patterns must have named groups. (Otherwise column index will be calculated incorrectly)
This will results in following output:
456 followed by ' '
3434 followed by ' '
298 followed by '.'
893434 followed by ' '
If you have Python 2.6 installed then you already have simplejson - just import json
; it's the same thing.
The TypeError
is happening because k
is a list, since it is created using a slice from another list with the line k = list[0:j]
. This should probably be something like k = ' '.join(list[0:j])
, so you have a string instead.
In addition to this, your if
statement is incorrect as noted by Jesse's answer, which should read if k not in d
or if not k in d
(I prefer the latter).
You are also clearing your dictionary on each iteration since you have d = {}
inside of your for
loop.
Note that you should also not be using list
or file
as variable names, since you will be masking builtins.
Here is how I would rewrite your code:
d = {}
with open("filename.txt", "r") as input_file:
for line in input_file:
fields = line.split()
j = fields.index("x")
k = " ".join(fields[:j])
d.setdefault(k, []).append(" ".join(fields[j+1:]))
The dict.setdefault()
method above replaces the if k not in d
logic from your code.
The answer here is very simple:
You're already containing it in double quotes, so there's no need to escape it with \
.
If you want to escape single quotes in a single quote string:
var string = 'this isn\'t a double quoted string';
var string = "this isn\"t a single quoted string";
// ^ ^ same types, hence we need to escape it with a backslash
or if you want to escape \'
, you can escape the bashslash to \\
and the quote to \'
like so:
var string = 'this isn\\\'t a double quoted string';
// vvvv
// \ ' (the escaped characters)
However, if you contain the string with a different quote type, you don't need to escape:
var string = 'this isn"t a double quoted string';
var string = "this isn't a single quoted string";
// ^ ^ different types, hence we don't need escaping
The same may be achieved with the stringi package:
library('stringi')
char_array <- c("foo_bar","bar_foo","apple","beer")
a <- data.frame("data"=char_array, "data2"=1:4)
(a$data <- stri_sub(a$data, 1, -4)) # from the first to the last but 4th char
## [1] "foo_" "bar_" "ap" "b"
I found another server side solution for web dev using PHP to get the size of an iframe.
First is using server script PHP to an external call via internal function: (like a file_get_contents
with but curl and dom).
function curl_get_file_contents($url,$proxyActivation=false) {
global $proxy;
$c = curl_init();
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7");
curl_setopt($c, CURLOPT_REFERER, $url);
curl_setopt($c, CURLOPT_URL, $url);
curl_setopt($c, CURLOPT_FOLLOWLOCATION, 1);
if($proxyActivation) {
curl_setopt($c, CURLOPT_PROXY, $proxy);
}
$contents = curl_exec($c);
curl_close($c);
$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
@$dom->loadHTML($contents);
$form = $dom->getElementsByTagName("body")->item(0);
if ($contents) //si on a du contenu
return $dom->saveHTML();
else
return FALSE;
}
$url = "http://www.google.com"; //Exernal url test to iframe
<html>
<head>
<script type="text/javascript">
</script>
<style type="text/css">
#iframe_reserve {
width: 560px;
height: 228px
}
</style>
</head>
<body>
<div id="iframe_reserve"><?php echo curl_get_file_contents($url); ?></div>
<iframe id="myiframe" src="http://www.google.com" scrolling="no" marginwidth="0" marginheight="0" frameborder="0" style="overflow:none; width:100%; display:none"></iframe>
<script type="text/javascript">
window.onload = function(){
document.getElementById("iframe_reserve").style.display = "block";
var divHeight = document.getElementById("iframe_reserve").clientHeight;
document.getElementById("iframe_reserve").style.display = "none";
document.getElementById("myiframe").style.display = "block";
document.getElementById("myiframe").style.height = divHeight;
alert(divHeight);
};
</script>
</body>
</html>
You need to display under the div (iframe_reserve
) the html generated by the function call by using a simple echo curl_get_file_contents("location url iframe","activation proxy")
After doing this a body event function onload with javascript take height of the page iframe just with a simple control of the content div (iframe_reserve
)
So I used divHeight = document.getElementById("iframe_reserve").clientHeight;
to get height of the page external we are going to call after masked the div container (iframe_reserve
). After this we load the iframe with its good height that's all.
Use the filter_var()
function to validate whether a string is URL or not:
var_dump(filter_var('example.com', FILTER_VALIDATE_URL));
It is bad practice to use regular expressions when not necessary.
EDIT: Be careful, this solution is not unicode-safe and not XSS-safe. If you need a complex validation, maybe it's better to look somewhere else.
One of the reasons why the global variable needs a prefix (called a "sigil") is because in Ruby, unlike in C, you don't have to declare your variables before assigning to them. The sigil is used as a way to be explicit about the scope of the variable.
Without a specific prefix for globals, given a statement pointNew = offset + point
inside your draw
method then offset
refers to a local variable inside the method (and results in a NameError
in this case). The same for @
used to refer to instance variables and @@
for class variables.
In other languages that use explicit declarations such as C
, Java
etc. the placement of the declaration is used to control the scope.
The problem is your angular material version, I have the same, and I have resolved this when I have installed the good version of angular material in local.
Hope it solve yours too.
I tried every answer but cleaning my npm cache worked..
steps:
File >> New Project >> Java Project With Existing Source>Next >> Project Name(add a name for your project) >> Next>>Add Folder >> select your existing project source code from your Directory>>Next >> Finish
Java Project With Existing Source
This will help:
http://www.w3schools.com/tags/att_hr_width.asp
<hr width="50%">
This creates a horizontal line with a width of 50%, you would need to create/modify the class if you would like to edit the style.
@Bangonkali provide the right answer, but this syntax seems more readable and just nicer to me:
eventChange($event: KeyboardEvent): void {
(<HTMLInputElement>$event.target).value;
}
I threw this stored procedure together with a start from @lain's comments above, kind of nice if you need to call it more than a few times (and not needing php):
delimiter //
-- ------------------------------------------------------------
-- Use the inforamtion_schema to tell if a field exists.
-- Optional param dbName, defaults to current database
-- ------------------------------------------------------------
CREATE PROCEDURE fieldExists (
OUT _exists BOOLEAN, -- return value
IN tableName CHAR(255), -- name of table to look for
IN columnName CHAR(255), -- name of column to look for
IN dbName CHAR(255) -- optional specific db
) BEGIN
-- try to lookup db if none provided
SET @_dbName := IF(dbName IS NULL, database(), dbName);
IF CHAR_LENGTH(@_dbName) = 0
THEN -- no specific or current db to check against
SELECT FALSE INTO _exists;
ELSE -- we have a db to work with
SELECT IF(count(*) > 0, TRUE, FALSE) INTO _exists
FROM information_schema.COLUMNS c
WHERE
c.TABLE_SCHEMA = @_dbName
AND c.TABLE_NAME = tableName
AND c.COLUMN_NAME = columnName;
END IF;
END //
delimiter ;
Working with fieldExists
mysql> call fieldExists(@_exists, 'jos_vm_product', 'child_option', NULL) //
Query OK, 0 rows affected (0.01 sec)
mysql> select @_exists //
+----------+
| @_exists |
+----------+
| 0 |
+----------+
1 row in set (0.00 sec)
mysql> call fieldExists(@_exists, 'jos_vm_product', 'child_options', 'etrophies') //
Query OK, 0 rows affected (0.01 sec)
mysql> select @_exists //
+----------+
| @_exists |
+----------+
| 1 |
+----------+
If you want this type of code to run in IE11 (which does not support much of ES6 at all), then you need to get a 3rd party promise library (like Bluebird), include that library and change your coding to use ES5 coding structures (no arrow functions, no let
, etc...) so you can live within the limits of what older browsers support.
Or, you can use a transpiler (like Babel) to convert your ES6 code to ES5 code that will work in older browsers.
Here's a version of your code written in ES5 syntax with the Bluebird promise library:
<script src="https://cdnjs.cloudflare.com/ajax/libs/bluebird/3.3.4/bluebird.min.js"></script>
<script>
'use strict';
var promise = new Promise(function(resolve) {
setTimeout(function() {
resolve("result");
}, 1000);
});
promise.then(function(result) {
alert("Fulfilled: " + result);
}, function(error) {
alert("Rejected: " + error);
});
</script>
** Update ** A scalars converter has been added to retrofit that allows for a String
response with less ceremony than my original answer below.
Example interface --
public interface GitHubService {
@GET("/users/{user}")
Call<String> listRepos(@Path("user") String user);
}
Add the ScalarsConverterFactory
to your retrofit builder. Note: If using ScalarsConverterFactory
and another factory, add the scalars factory first.
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(ScalarsConverterFactory.create())
// add other factories here, if needed.
.build();
You will also need to include the scalars converter in your gradle file --
implementation 'com.squareup.retrofit2:converter-scalars:2.1.0'
--- Original Answer (still works, just more code) ---
I agree with @CommonsWare that it seems a bit odd that you want to intercept the request to process the JSON yourself. Most of the time the POJO has all the data you need, so no need to mess around in JSONObject
land. I suspect your specific problem might be better solved using a custom gson TypeAdapter
or a retrofit Converter
if you need to manipulate the JSON. However, retrofit provides more the just JSON parsing via Gson. It also manages a lot of the other tedious tasks involved in REST requests. Just because you don't want to use one of the features, doesn't mean you have to throw the whole thing out. There are times you just want to get the raw stream, so here is how to do it -
First, if you are using Retrofit 2, you should start using the Call
API. Instead of sending an object to convert as the type parameter, use ResponseBody
from okhttp --
public interface GitHubService {
@GET("/users/{user}")
Call<ResponseBody> listRepos(@Path("user") String user);
}
then you can create and execute your call --
GitHubService service = retrofit.create(GitHubService.class);
Call<ResponseBody> result = service.listRepos(username);
result.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Response<ResponseBody> response) {
try {
System.out.println(response.body().string());
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(Throwable t) {
e.printStackTrace();
}
});
Note The code above calls string()
on the response object, which reads the entire response into a String. If you are passing the body off to something that can ingest streams, you can call charStream()
instead. See the ResponseBody
docs.
1.question answer-In your mobile having Developer Option in settings and enable that one. after In android studio project source file in bin--> apk file .just copy the apk file and paste in mobile memory in ur pc.. after all finished .you click that apk file in your mobile is automatically installed.
2.question answer-Your mobile is Samsung are just add Samsung Kies software in your pc..its helps to android code run in your mobile ...
how to fetch the dropdown values from database and display in jsp:
Dynamically Fetch data from Mysql to (drop down) select option in Jsp. This post illustrates, to fetch the data from the mysql database and display in select option element in Jsp. You should know the following post before going through this post i.e :
How to Connect Mysql database to jsp.
How to create database in MySql and insert data into database. Following database is used, to illustrate ‘Dynamically Fetch data from Mysql to (drop down)
select option in Jsp’ :
id City
1 London
2 Bangalore
3 Mumbai
4 Paris
Following codes are used to insert the data in the MySql database. Database used is “City” and username = “root” and password is also set as “root”.
Create Database city;
Use city;
Create table new(id int(4), city varchar(30));
insert into new values(1, 'LONDON');
insert into new values(2, 'MUMBAI');
insert into new values(3, 'PARIS');
insert into new values(4, 'BANGLORE');
Here is the code to Dynamically Fetch data from Mysql to (drop down) select option in Jsp:
<%@ page import="java.sql.*" %>
<%ResultSet resultset =null;%>
<HTML>
<HEAD>
<TITLE>Select element drop down box</TITLE>
</HEAD>
<BODY BGCOLOR=##f89ggh>
<%
try{
//Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection =
DriverManager.getConnection
("jdbc:mysql://localhost/city?user=root&password=root");
Statement statement = connection.createStatement() ;
resultset =statement.executeQuery("select * from new") ;
%>
<center>
<h1> Drop down box or select element</h1>
<select>
<% while(resultset.next()){ %>
<option><%= resultset.getString(2)%></option>
<% } %>
</select>
</center>
<%
//**Should I input the codes here?**
}
catch(Exception e)
{
out.println("wrong entry"+e);
}
%>
</BODY>
</HTML>
How about:
return (returnValue == "1");
or as suggested below:
return (returnValue != "0");
The correct one will depend on what you are looking for as a success result.
This will work
@Cacheable(value="bookCache", key="#checkwarehouse.toString().append(#isbn.toString())")
<!DOCTYPE html>_x000D_
<html>_x000D_
<head>_x000D_
<style> _x000D_
_x000D_
.abc123_x000D_
{_x000D_
-webkit-appearance:none;_x000D_
width: 14px;_x000D_
height: 14px;_x000D_
display: inline-block;_x000D_
background: #FFFFFF;_x000D_
border: 1px solid rgba(220,220,225,1);_x000D_
}_x000D_
.abc123:after {_x000D_
content: "";_x000D_
display: inline-block;_x000D_
position: relative;_x000D_
top: -3px;_x000D_
left: 4px;_x000D_
width: 3px;_x000D_
height: 5px;_x000D_
border-bottom: 1px solid #fff;_x000D_
border-right: 1px solid #fff;_x000D_
-webkit-transform: rotate(45deg);_x000D_
}_x000D_
_x000D_
input[type=checkbox]:checked {_x000D_
background: #327DFF;_x000D_
outline: none;_x000D_
border: 1px solid rgba(50,125,255,1);_x000D_
}_x000D_
input:focus,input:active {_x000D_
outline: none;_x000D_
}_x000D_
_x000D_
input:hover {_x000D_
border: 1px solid rgba(50,125,255,1);_x000D_
}_x000D_
_x000D_
</style>_x000D_
</head>_x000D_
<body>_x000D_
_x000D_
<input class="abc123" type="checkbox"></input>_x000D_
_x000D_
_x000D_
</body>_x000D_
</html>
_x000D_
If this is just for debugging output, you can use the following to see all the types and values as well.
var_dump($obj);
If you want more control over the output you can use this:
foreach ($obj as $key => $value) {
echo "$key => $value\n";
}
After Struggling a bit with Arzoo International flight API, I've finally found the solution and the code simply works absolutely great with me. Here are the complete working code:
//Store your XML Request in a variable
$input_xml = '<AvailRequest>
<Trip>ONE</Trip>
<Origin>BOM</Origin>
<Destination>JFK</Destination>
<DepartDate>2013-09-15</DepartDate>
<ReturnDate>2013-09-16</ReturnDate>
<AdultPax>1</AdultPax>
<ChildPax>0</ChildPax>
<InfantPax>0</InfantPax>
<Currency>INR</Currency>
<PreferredClass>E</PreferredClass>
<Eticket>true</Eticket>
<Clientid>777ClientID</Clientid>
<Clientpassword>*Your API Password</Clientpassword>
<Clienttype>ArzooINTLWS1.0</Clienttype>
<PreferredAirline></PreferredAirline>
</AvailRequest>';
Now I've made a little changes in the above curl_setopt declaration as follows:
$url = "http://59.162.33.102:9301/Avalability";
//setting the curl parameters.
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
// Following line is compulsary to add as it is:
curl_setopt($ch, CURLOPT_POSTFIELDS,
"xmlRequest=" . $input_xml);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 300);
$data = curl_exec($ch);
curl_close($ch);
//convert the XML result into array
$array_data = json_decode(json_encode(simplexml_load_string($data)), true);
print_r('<pre>');
print_r($array_data);
print_r('</pre>');
That's it the code works absolutely fine for me. I really appreciate @hakre & @Lucas For their wonderful support.
Use the first; it directly tries to check if something is defined in environ
. Though the second form works equally well, it's lacking semantically since you get a value back if it exists and only use it for a comparison.
You're trying to see if something is present in environ
, why would you get just to compare it and then toss it away?
That's exactly what getenv
does:
Get an environment variable, return
None
if it doesn't exist. The optional second argument can specify an alternate default.
(this also means your check could just be if getenv("FOO")
)
you don't want to get it, you want to check for it's existence.
Either way, getenv
is just a wrapper around environ.get
but you don't see people checking for membership in mappings with:
from os import environ
if environ.get('Foo') is not None:
To summarize, use:
if "FOO" in os.environ:
pass
if you just want to check for existence, while, use getenv("FOO")
if you actually want to do something with the value you might get.
I’m going to hold the unpopular on SO selenium tag opinion that XPath is preferable to CSS in the longer run.
This long post has two sections - first I'll put a back-of-the-napkin proof the performance difference between the two is 0.1-0.3 milliseconds (yes; that's 100 microseconds), and then I'll share my opinion why XPath is more powerful.
Let's first tackle "the elephant in the room" – that xpath is slower than css.
With the current cpu power (read: anything x86 produced since 2013), even on browserstack/saucelabs/aws VMs, and the development of the browsers (read: all the popular ones in the last 5 years) that is hardly the case. The browser's engines have developed, the support of xpath is uniform, IE is out of the picture (hopefully for most of us). This comparison in the other answer is being cited all over the place, but it is very contextual – how many are running – or care about – automation against IE8?
If there is a difference, it is in a fraction of a millisecond.
Yet, most higher-level frameworks add at least 1ms of overhead over the raw selenium call anyways (wrappers, handlers, state storing etc); my personal weapon of choice – RobotFramework – adds at least 2ms, which I am more than happy to sacrifice for what it provides. A network roundtrip from an AWS us-east-1 to BrowserStack's hub is usually 11 milliseconds.
So with remote browsers if there is a difference between xpath and css, it is overshadowed by everything else, in orders of magnitude.
There are not that many public comparisons (I've really seen only the cited one), so – here's a rough single-case, dummy and simple one.
It will locate an element by the two strategies X times, and compare the average time for that.
The target – BrowserStack's landing page, and its "Sign Up" button; a screenshot of the html as writing this post:
Here's the test code (python):
from selenium import webdriver
import timeit
if __name__ == '__main__':
xpath_locator = '//div[@class="button-section col-xs-12 row"]'
css_locator = 'div.button-section.col-xs-12.row'
repetitions = 1000
driver = webdriver.Chrome()
driver.get('https://www.browserstack.com/')
css_time = timeit.timeit("driver.find_element_by_css_selector(css_locator)",
number=repetitions, globals=globals())
xpath_time = timeit.timeit('driver.find_element_by_xpath(xpath_locator)',
number=repetitions, globals=globals())
driver.quit()
print("css total time {} repeats: {:.2f}s, per find: {:.2f}ms".
format(repetitions, css_time, (css_time/repetitions)*1000))
print("xpath total time for {} repeats: {:.2f}s, per find: {:.2f}ms".
format(repetitions, xpath_time, (xpath_time/repetitions)*1000))
For those not familiar with Python – it opens the page, and finds the element – first with the css locator, then with the xpath; the find operation is repeated 1,000 times. The output is the total time in seconds for the 1,000 repetitions, and average time for one find in milliseconds.
The locators are:
Deliberately chosen not to be over-tuned; also, the class selector is cited for the css as "the second fastest after an id".
The environment – Chrome v66.0.3359.139, chromedriver v2.38, cpu: ULV Core M-5Y10 usually running at 1.5GHz (yes, a "word-processing" one, not even a regular i7 beast).
Here's the output:
css total time 1000 repeats: 8.84s, per find: 8.84ms xpath total time for 1000 repeats: 8.52s, per find: 8.52ms
Obviously the per find timings are pretty close; the difference is 0.32 milliseconds. Don't jump "the xpath is faster" – sometimes it is, sometimes it's css.
Let's try with another set of locators, a tiny-bit more complicated – an attribute having a substring (common approach at least for me, going after an element's class when a part of it bears functional meaning):
xpath_locator = '//div[contains(@class, "button-section")]'
css_locator = 'div[class~=button-section]'
The two locators are again semantically the same – "find a div element having in its class attribute this substring".
Here are the results:
css total time 1000 repeats: 8.60s, per find: 8.60ms xpath total time for 1000 repeats: 8.75s, per find: 8.75ms
Diff of 0.15ms.
As an exercise - the same test as done in the linked blog in the comments/other answer - the test page is public, and so is the testing code.
They are doing a couple of things in the code - clicking on a column to sort by it, then getting the values, and checking the UI sort is correct.
I'll cut it - just get the locators, after all - this is the root test, right?
The same code as above, with these changes in:
The url is now http://the-internet.herokuapp.com/tables
; there are 2 tests.
The locators for the first one - "Finding Elements By ID and Class" - are:
css_locator = '#table2 tbody .dues'
xpath_locator = "//table[@id='table2']//tr/td[contains(@class,'dues')]"
And here is the outcome:
css total time 1000 repeats: 8.24s, per find: 8.24ms xpath total time for 1000 repeats: 8.45s, per find: 8.45ms
Diff of 0.2 milliseconds.
The "Finding Elements By Traversing":
css_locator = '#table1 tbody tr td:nth-of-type(4)'
xpath_locator = "//table[@id='table1']//tr/td[4]"
The result:
css total time 1000 repeats: 9.29s, per find: 9.29ms xpath total time for 1000 repeats: 8.79s, per find: 8.79ms
This time it is 0.5 ms (in reverse, xpath turned out "faster" here).
So 5 years later (better browsers engines) and focusing only on the locators performance (no actions like sorting in the UI, etc), the same testbed - there is practically no difference between CSS and XPath.
So, out of xpath and css, which of the two to choose for performance? The answer is simple – choose locating by id.
Long story short, if the id of an element is unique (as it's supposed to be according to the specs), its value plays an important role in the browser's internal representation of the DOM, and thus is usually the fastest.
Yet, unique and constant (e.g. not auto-generated) ids are not always available, which brings us to "why XPath if there's CSS?"
With the performance out of the picture, why do I think xpath is better? Simple – versatility, and power.
Xpath is a language developed for working with XML documents; as such, it allows for much more powerful constructs than css.
For example, navigation in every direction in the tree – find an element, then go to its grandparent and search for a child of it having certain properties.
It allows embedded boolean conditions – cond1 and not(cond2 or not(cond3 and cond4))
; embedded selectors – "find a div having these children with these attributes, and then navigate according to it".
XPath allows searching based on a node's value (its text) – however frowned upon this practice is, it does come in handy especially in badly structured documents (no definite attributes to step on, like dynamic ids and classes - locate the element by its text content).
The stepping in css is definitely easier – one can start writing selectors in a matter of minutes; but after a couple of days of usage, the power and possibilities xpath has quickly overcomes css.
And purely subjective – a complex css is much harder to read than a complex xpath expression.
Finally, again very subjective - which one to chose?
IMO, there is no right or wrong choice - they are different solutions to the same problem, and whatever is more suitable for the job should be picked.
Being "a fan" of XPath I'm not shy to use in my projects a mix of both - heck, sometimes it is much faster to just throw a CSS one, if I know it will do the work just fine.
Math.floor(Math.random() * (limit+1))
Math.random()
generates a floating point number between 0 and 1, Math.floor()
rounds it down to an integer.
By multiplying it by a number, you effectively make the range 0..number-1
. If you wish to generate it in range from num1
to num2
, do:
Math.floor(Math.random() * (num2-num1 + 1) + num1)
To generate more numbers, just use a for loop and put results into an array or write them into the document directly.
1) You should be able to change the ssh configuration (on Ubuntu this is typically in /etc/ssh
or /etc/sshd
) and re-enable password logins.
2) There's nothing really AWS specific about this - Apache can handle VHOSTS (virtual hosts) out-of-the-box - allowing you to specify that a certain domain is served from a certain directory. I'd Google that for more info on the specifics.
Instead of LIKE
(which does work as other commenters have suggested), you can alternatively use CHARINDEX
:
declare @full varchar(100) = 'abcdefg'
declare @find varchar(100) = 'cde'
if (charindex(@find, @full) > 0)
print 'exists'
To use an image for body background in CSS
body {
background-image: url("image.jpg");
}
String result;
String str = "/usr/local/apache2/resumes/dir1/dir2/dir3/dir4";
String regex ="(dir)+[\\d]";
Matcher matcher = Pattern.compile( regex ).matcher( str);
while (matcher.find( ))
{
result = matcher.group();
System.out.println(result);
}
output-- dir1 dir2 dir3 dir4
>>> x = 'it is icy'.replace('i', '', 1)
>>> x
't is icy'
Since your code would only replace the first instance, I assumed that's what you wanted. If you want to replace them all, leave off the 1
argument.
Since you cannot replace the character in the string itself, you have to reassign it back to the variable. (Essentially, you have to update the reference instead of modifying the string.)
Java enums are not like C or C++ enums, which are really just labels for integers.
Java enums are implemented more like classes - and they can even have multiple attributes.
public enum Ids {
OPEN(100), CLOSE(200);
private final int id;
Ids(int id) { this.id = id; }
public int getValue() { return id; }
}
The big difference is that they are type-safe which means you don't have to worry about assigning a COLOR enum to a SIZE variable.
See http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html for more.
Or if you want a ripple pulse effect, you could use this:
http://jsfiddle.net/Fy8vD/3041/
.gps_ring {
border: 2px solid #fff;
-webkit-border-radius: 50%;
height: 18px;
width: 18px;
position: absolute;
left:20px;
top:214px;
-webkit-animation: pulsate 1s ease-out;
-webkit-animation-iteration-count: infinite;
opacity: 0.0;
}
.gps_ring:before {
content:"";
display:block;
border: 2px solid #fff;
-webkit-border-radius: 50%;
height: 30px;
width: 30px;
position: absolute;
left:-8px;
top:-8px;
-webkit-animation: pulsate 1s ease-out;
-webkit-animation-iteration-count: infinite;
-webkit-animation-delay: 0.1s;
opacity: 0.0;
}
.gps_ring:after {
content:"";
display:block;
border:2px solid #fff;
-webkit-border-radius: 50%;
height: 50px;
width: 50px;
position: absolute;
left:-18px;
top:-18px;
-webkit-animation: pulsate 1s ease-out;
-webkit-animation-iteration-count: infinite;
-webkit-animation-delay: 0.2s;
opacity: 0.0;
}
@-webkit-keyframes pulsate {
0% {-webkit-transform: scale(0.1, 0.1); opacity: 0.0;}
50% {opacity: 1.0;}
100% {-webkit-transform: scale(1.2, 1.2); opacity: 0.0;}
}
It's not January 1, 1753 but select cast('' as datetime) wich reveals: 1900-01-01 00:00:00.000 gives the default value by SQL server. (Looks more uninitialized to me anyway)
well, using the Macro record, and doing it manually, I ended up with this code .. which seems to work .. (although it's not a one liner like yours ;)
lrow = Selection.Row()
Rows(lrow).Select
Selection.Copy
Rows(lrow + 1).Select
Selection.Insert Shift:=xlDown
Application.CutCopyMode = False
Selection.ClearContents
(I put the ClearContents in there because you indicated you wanted format, and I'm assuming you didn't want the data ;) )
Here is a very basic understanding over interface vs abstract class.
The lower the loss, the better a model (unless the model has over-fitted to the training data). The loss is calculated on training and validation and its interperation is how well the model is doing for these two sets. Unlike accuracy, loss is not a percentage. It is a summation of the errors made for each example in training or validation sets.
In the case of neural networks, the loss is usually negative log-likelihood and residual sum of squares for classification and regression respectively. Then naturally, the main objective in a learning model is to reduce (minimize) the loss function's value with respect to the model's parameters by changing the weight vector values through different optimization methods, such as backpropagation in neural networks.
Loss value implies how well or poorly a certain model behaves after each iteration of optimization. Ideally, one would expect the reduction of loss after each, or several, iteration(s).
The accuracy of a model is usually determined after the model parameters are learned and fixed and no learning is taking place. Then the test samples are fed to the model and the number of mistakes (zero-one loss) the model makes are recorded, after comparison to the true targets. Then the percentage of misclassification is calculated.
For example, if the number of test samples is 1000 and model classifies 952 of those correctly, then the model's accuracy is 95.2%.
There are also some subtleties while reducing the loss value. For instance, you may run into the problem of over-fitting in which the model "memorizes" the training examples and becomes kind of ineffective for the test set. Over-fitting also occurs in cases where you do not employ a regularization, you have a very complex model (the number of free parameters W
is large) or the number of data points N
is very low.
My understanding is that when the font is set as follows
body {
font-size: 100%;
}
the browser will render the font as per the user settings for that browser.
The spec says that % is rendered
relative to parent element's font size
http://www.w3.org/TR/CSS1/#font-size
In this case, I take that to mean what the browser is set to.
I know this is a old question but i think i must provide my answer to it because my problem was not solved by others.
first of all : i was dynamically adding fragments using fragmentTransactions. Second: my fragments were modified using AsyncTasks (DB queries on a server). Third: my fragment was not instantiated at activity start Fourth: i used a custom fragment instantiation "create or load it" in order to get the fragment variable. Fourth: activity was recreated because of orientation change
The problem was that i wanted to "remove" the fragment because of the query answer, but the fragment was incorrectly created just before. I don't know why, probably because of the "commit" be done later, the fragment was not added yet when it was time to remove it. Therefore getActivity() was returning null.
Solution : 1)I had to check that i was correctly trying to find the first instance of the fragment before creating a new one 2)I had to put serRetainInstance(true) on that fragment in order to keep it through orientation change (no backstack needed therefore no problem) 3)Instead of "recreating or getting old fragment" just before "remove it", I directly put the fragment at activity start. Instantiating it at activity start instead of "loading" (or instantiating) the fragment variable before removing it prevented getActivity problems.
I've just put together what you may be looking for: http://www.graphdracula.net
It's JavaScript with directed graph layouting, SVG and you can even drag the nodes around. Still needs some tweaking, but is totally usable. You create nodes and edges easily with JavaScript code like this:
var g = new Graph();
g.addEdge("strawberry", "cherry");
g.addEdge("cherry", "apple");
g.addEdge("id34", "cherry");
I used the previously mentioned Raphael JS library (the graffle example) plus some code for a force based graph layout algorithm I found on the net (everything open source, MIT license). If you have any remarks or need a certain feature, I may implement it, just ask!
You may want to have a look at other projects, too! Below are two meta-comparisons:
SocialCompare has an extensive list of libraries, and the "Node / edge graph" line will filter for graph visualization ones.
DataVisualization.ch has evaluated many libraries, including node/graph ones. Unfortunately there's no direct link so you'll have to filter for "graph":
Here's a list of similar projects (some have been already mentioned here):
vis.js supports many types of network/edge graphs, plus timelines and 2D/3D charts. Auto-layout, auto-clustering, springy physics engine, mobile-friendly, keyboard navigation, hierarchical layout, animation etc. MIT licensed and developed by a Dutch firm specializing in research on self-organizing networks.
Cytoscape.js - interactive graph analysis and visualization with mobile support, following jQuery conventions. Funded via NIH grants and developed by by @maxkfranz (see his answer below) with help from several universities and other organizations.
The JavaScript InfoVis Toolkit - Jit, an interactive, multi-purpose graph drawing and layout framework. See for example the Hyperbolic Tree. Built by Twitter dataviz architect Nicolas Garcia Belmonte and bought by Sencha in 2010.
D3.js Powerful multi-purpose JS visualization library, the successor of Protovis. See the force-directed graph example, and other graph examples in the gallery.
Plotly's JS visualization library uses D3.js with JS, Python, R, and MATLAB bindings. See a nexworkx example in IPython here, human interaction example here, and JS Embed API.
sigma.js Lightweight but powerful library for drawing graphs
jsPlumb jQuery plug-in for creating interactive connected graphs
Springy - a force-directed graph layout algorithm
Processing.js Javascript port of the Processing library by John Resig
JS Graph It - drag'n'drop boxes connected by straight lines. Minimal auto-layout of the lines.
RaphaelJS's Graffle - interactive graph example of a generic multi-purpose vector drawing library. RaphaelJS can't layout nodes automatically; you'll need another library for that.
JointJS Core - David Durman's MPL-licensed open source diagramming library. It can be used to create either static diagrams or fully interactive diagramming tools and application builders. Works in browsers supporting SVG. Layout algorithms not-included in the core package
mxGraph Previously commercial HTML 5 diagramming library, now available under Apache v2.0. mxGraph is the base library used in draw.io.
GoJS Interactive graph drawing and layout library
yFiles for HTML Commercial graph drawing and layout library
KeyLines Commercial JS network visualization toolkit
ZoomCharts Commercial multi-purpose visualization library
Syncfusion JavaScript Diagram Commercial diagram library for drawing and visualization.
Cytoscape Web Embeddable JS Network viewer (no new features planned; succeeded by Cytoscape.js)
Canviz JS renderer for Graphviz graphs. Abandoned in Sep 2013.
arbor.js Sophisticated graphing with nice physics and eye-candy. Abandoned in May 2012. Several semi-maintained forks exist.
jssvggraph "The simplest possible force directed graph layout algorithm implemented as a Javascript library that uses SVG objects". Abandoned in 2012.
jsdot Client side graph drawing application. Abandoned in 2011.
Protovis Graphical Toolkit for Visualization (JavaScript). Replaced by d3.
Moo Wheel Interactive JS representation for connections and relations (2008)
JSViz 2007-era graph visualization script
dagre Graph layout for JavaScript
Graphviz Sophisticated graph visualization language
Flare Beautiful and powerful Flash based graph drawing
NodeBox Python Graph Visualization
Typically, iterators are used to access elements of a container in linear fashion; however, with "random access iterators", it is possible to access any element in the same fashion as operator[]
.
To access arbitrary elements in a vector vec
, you can use the following:
vec.begin() // 1st
vec.begin()+1 // 2nd
// ...
vec.begin()+(i-1) // ith
// ...
vec.begin()+(vec.size()-1) // last
The following is an example of a typical access pattern (earlier versions of C++):
int sum = 0;
using Iter = std::vector<int>::const_iterator;
for (Iter it = vec.begin(); it!=vec.end(); ++it) {
sum += *it;
}
The advantage of using iterator is that you can apply the same pattern with other containers:
sum = 0;
for (Iter it = lst.begin(); it!=lst.end(); ++it) {
sum += *it;
}
For this reason, it is really easy to create template code that will work the same regardless of the container type. Another advantage of iterators is that it doesn't assume the data is resident in memory; for example, one could create a forward iterator that can read data from an input stream, or that simply generates data on the fly (e.g. a range or random number generator).
Another option using std::for_each
and lambdas:
sum = 0;
std::for_each(vec.begin(), vec.end(), [&sum](int i) { sum += i; });
Since C++11 you can use auto
to avoid specifying a very long, complicated type name of the iterator as seen before (or even more complex):
sum = 0;
for (auto it = vec.begin(); it!=vec.end(); ++it) {
sum += *it;
}
And, in addition, there is a simpler for-each variant:
sum = 0;
for (auto value : vec) {
sum += value;
}
And finally there is also std::accumulate
where you have to be careful whether you are adding integer or floating point numbers.
$("#singlechatpanel-1").is(':visible');
$("#singlechatpanel-1").is(':hidden');
I was getting a similar issue from the Apache Lounge 32 bit version. After downloading the 64 bit version, the issue was resolved.
Here is an excellent video explain the steps involved: https://www.youtube.com/watch?v=17qhikHv5hY
For Mac users(OS X El Capitan
):
You need to kill the port that localhost:8080
is running on.
To do this, you need to do two commands in the terminal :N
sudo lsof -i tcp:8080
kill -15 PID
NB! PID
IS A NUMBER PROVIDED BY THE FIRST COMMAND.
The first command gives you the PID
for the localhost:8080
.
Replace the PID
in the second command with the PID
that the first command gives you to kill the process running on localhost:8080
.
In my sql use information function
select FOUND_ROWS();
it will return the no. of rows returned by select query.
The differences between an Abstract Class
and an Interface
:
Abstract Classes
An abstract class can provide some functionality and leave the rest for derived class.
The derived class may or may not override the concrete functions defined in the base class.
A child class extended from an abstract class should logically be related.
Interface
An interface cannot contain any functionality. It only contains definitions of the methods.
The derived class MUST provide code for all the methods defined in the interface.
Completely different and non-related classes can be logically grouped together using an interface.
Besides the third party products listed here, there is another one: NetLib Encryptionizer. However it works in a different way than the obfuscators. Obfuscators modify the assembly itself with a deobfuscation "engine" built into it. Encryptionizer encrypts the DLLs (Managed or Unmanaged) at the file level. So it does not modify the DLL except to encrypt it. The "engine" in this case is a kernel mode driver that sits between your application and the operating system. (Disclaimer: I am from NetLib Security)
If this error occurs when running a Gradle (or Maven) task, you need to modify that build tool configuration to point to your installation of Java JDK 1.8 following this route:
File -> Settings -> Build, Execution, Deployment -> Build Tools -> Gradle
There you check the Linked Gradle project is the one you are working on and select the Gradle JVM (You missed this when you imported the gradle project into IntelliJ)
Remember when importing a Gradle (or Maven) project to set the target JVM correctly here:
As of IE11, you need to use addEventListener
. attachEvent
is deprecated and throws an error.
https://angular.io/docs/ts/latest/guide/router.html
Add the base element just after the
<head>
tag. If theapp
folder is the application root, as it is for our application, set thehref
value exactly as shown here.
The <base href="/">
tells the Angular router what is the static part of the URL. The router then only modifies the remaining part of the URL.
<head>
<base href="/">
...
</head>
Alternatively add
>= Angular2 RC.6
import {APP_BASE_HREF} from '@angular/common';
@NgModule({
declarations: [AppComponent],
imports: [routing /* or RouterModule */],
providers: [{provide: APP_BASE_HREF, useValue : '/' }]
]);
in your bootstrap.
In older versions the imports had to be like
< Angular2 RC.6
import {APP_BASE_HREF} from '@angular/common';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
{provide: APP_BASE_HREF, useValue : '/' });
]);
< RC.0
import {provide} from 'angular2/core';
bootstrap(AppComponent, [
ROUTER_PROVIDERS,
provide(APP_BASE_HREF, {useValue : '/' });
]);
< beta.17
import {APP_BASE_HREF} from 'angular2/router';
>= beta.17
import {APP_BASE_HREF} from 'angular2/platform/common';
See also Location and HashLocationStrategy stopped working in beta.16
Use the approach where you send username and password in URL Request:
http://username:[email protected]
So just to make it more clear. The username is username
password is password
and the rest is usual URL of your test web
Works for me without needing any tweaks.
Sample Java code:
public static final String TEST_ENVIRONMENT = "the-site.com";
private WebDriver driver;
public void login(String uname, String pwd){
String URL = "http://" + uname + ":" + pwd + "@" + TEST_ENVIRONMENT;
driver.get(URL);
}
@Test
public void testLogin(){
driver = new FirefoxDriver();
login("Pavel", "UltraSecretPassword");
//Assert...
}
Thanks for above answer , here is my jQuery code that is working now:
$(".header-login-li").click(function(){
activaTab('pane_login');
});
$(".header-register-li").click(function(){
activaTab('pane_reg');
$("#reg_log_modal_header_text").css()
});
function activaTab(tab){
$('.nav-tabs a[href="#' + tab + '"]').tab('show');
};
Ok guys I found the reason for my encoding issue.
The fault was in my build process. I didn't tell Maven in my pom.xml
file to build the project with the UTF-8 encoding. Therefor Maven just took the default encoding from my system which is MacRoman and build it with the MacRoman encoding.
Luckily Maven is warning you about this when building your project (BUT there is a good chance that the warning disappears to fast from your screen because of all the other messages).
Here is the property you need to set in the pom.xml
file:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
...
</properties>
Thank you guys for all your help. Without you guys I wouldn't be able to figure this out!
More generally, I think you might want to get "top" of the rows that are sorted within a given group.
For the case of where a single value is max'd out, you have essentially sorted by only one column. However, it's often useful to hierarchically sort by multiple columns (for example: a date column and a time-of-day column).
# Answering the question of getting row with max "value".
df %>%
# Within each grouping of A and B values.
group_by( A, B) %>%
# Sort rows in descending order by "value" column.
arrange( desc(value) ) %>%
# Pick the top 1 value
slice(1) %>%
# Remember to ungroup in case you want to do further work without grouping.
ungroup()
# Answering an extension of the question of
# getting row with the max value of the lowest "C".
df %>%
# Within each grouping of A and B values.
group_by( A, B) %>%
# Sort rows in ascending order by C, and then within that by
# descending order by "value" column.
arrange( C, desc(value) ) %>%
# Pick the one top row based on the sort
slice(1) %>%
# Remember to ungroup in case you want to do further work without grouping.
ungroup()
With $("div.desc").hide();
you are essentially trying to hide a div with a class name of desc
. Which doesn't exist. With $("#"+test).show();
you are trying to show either a div with an id of #2
or #3
. Those are illegal id's in HTML (can't start with a number), though they will work in many browsers. However, they don't exist.
I'd rename the two divs to carDiv2
and carDiv3
and then use different logic to hide or show.
if((test) == 2) { ... }
Also, use a class for your checkboxes so your binding becomes something like
$('.carCheckboxes').click(function ...
The problem seems to be in the way how ng-model
works with input
and overwrites the name
object, making it lost for ng-repeat
.
As a workaround, one can use the following code:
<div ng-repeat="name in names">
Value: {{name}}
<input ng-model="names[$index]">
</div>
Hope it helps
IE didn't add media query support until IE9. So with IE8 you're out of luck.
PUT ing
PUT /binders/{id}/docs
Create or update, and relate a single document to a binder
e.g.:
PUT /binders/1/docs HTTP/1.1
{
"docNumber" : 1
}
PATCH ing
PATCH /docs
Create docs if they do not exist and relate them to binders
e.g.:
PATCH /docs HTTP/1.1
[
{ "op" : "add", "path" : "/binder/1/docs", "value" : { "doc_number" : 1 } },
{ "op" : "add", "path" : "/binder/8/docs", "value" : { "doc_number" : 8 } },
{ "op" : "add", "path" : "/binder/3/docs", "value" : { "doc_number" : 6 } }
]
I'll include additional insights later, but in the meantime if you want to, have a look at RFC 5789, RFC 6902 and William Durand's Please. Don't Patch Like an Idiot blog entry.
return dataSource.getParkingLots()
.stream()
.filter(parkingLot -> Objects.equals(parkingLot.getId(), id))
.findFirst()
.orElse(null);
I had to filter out only one object from a list of objects. So i used this, hope it helps.
Exception classes are like "normal" classes. You create a new class when it "is" a different type of object, with different fields and different operations.
As a rule of thumb, you should try balance between the number of exceptions and the granularity of the exceptions. If your method throws more than 4-5 different exceptions, you can probably merge some of them into more "general" exceptions, (e.g. in your case "AuthenticationFailedException"), and using the exception message to detail what went wrong. Unless your code handles each of them differently, you needn't creates many exception classes. And if it does, may you should just return an enum with the error that occured. It's a bit cleaner this way.
EDIT: Casting to a float/int no longer works in recent versions of SQL Server. Use the following instead:
select datediff(day, '1899-12-30T00:00:00', my_date_field)
from mytable
Note the string date should be in an unambiguous date format so that it isn't affected by your server's regional settings.
In older versions of SQL Server, you can convert from a DateTime to an Integer by casting to a float, then to an int:
select cast(cast(my_date_field as float) as int)
from mytable
(NB: You can't cast straight to an int, as MSSQL rounds the value up if you're past mid day!)
If there's an offset in your data, you can obviously add or subtract this from the result
You can convert in the other direction, by casting straight back:
select cast(my_integer_date as datetime)
from mytable
Jackson provides an annotation that can be used on class level (JsonIgnoreProperties).
Add the following to the top of your class (not to individual methods):
@JsonIgnoreProperties(ignoreUnknown = true)
public class Foo {
...
}
Depending on the jackson version you are using you would have to use a different import in the current version it is:
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
in older versions it has been:
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
In addition to what provided in the other answers, the keyword "zorder" allows one to decide the order in which different objects are plotted vertically. E.g.:
plt.plot(x,y,zorder=1)
plt.scatter(x,y,zorder=2)
plots the scatter symbols on top of the line, while
plt.plot(x,y,zorder=2)
plt.scatter(x,y,zorder=1)
plots the line over the scatter symbols.
See, e.g., the zorder demo
Android 3.2 introduces a new approach to screen sizes,the numbers describing the screen size are all in “dp” units.Mostly we can use
smallest width dp: the smallest width available for application layout in “dp” units; this is the smallest width dp that you will ever encounter in any rotation of the display.
To create one right click on res >>> new >>> Android resource directory
From Available qualifiers window move Smallest Screen Width to Chosen qualifiers
In Screen width window just write the "dp" value starting from you would like Android Studio to use that dimens.
Than change to Project view,right click on your new created resource directory
new >>> Values resource file enter a new file name dimens.xml and you are done.
Use ctrl+R or cmd+R in OSX
ps -eo pid,cmd,lstart | grep YOUR-PID-HERE
for those searching for an alternative to $result = $stmt->get_result()
I've made this function which allows you to mimic the $result->fetch_assoc()
but using directly the stmt object:
function fetchAssocStatement($stmt)
{
if($stmt->num_rows>0)
{
$result = array();
$md = $stmt->result_metadata();
$params = array();
while($field = $md->fetch_field()) {
$params[] = &$result[$field->name];
}
call_user_func_array(array($stmt, 'bind_result'), $params);
if($stmt->fetch())
return $result;
}
return null;
}
as you can see it creates an array and fetches it with the row data, since it uses $stmt->fetch()
internally, you can call it just as you would call mysqli_result::fetch_assoc
(just be sure that the $stmt
object is open and result is stored):
//mysqliConnection is your mysqli connection object
if($stmt = $mysqli_connection->prepare($query))
{
$stmt->execute();
$stmt->store_result();
while($assoc_array = fetchAssocStatement($stmt))
{
//do your magic
}
$stmt->close();
}
The following will order your data depending on both column in descending order.
ORDER BY article_rating DESC, article_time DESC
The best way is to specify the format.
format(a, 'b')
returns the binary value of a in string format.
To convert a binary string back to integer, use int() function.
int('110', 2)
returns integer value of binary string.
For completeness, the simplest solution i know with seaborn as of late 2019, if one is using Jupyter:
import seaborn as sns
sns.heatmap(dataframe.corr())
Old question I know, but just to add some additional information:
Note: It is important to understand that the "PHP CLI Version" is used by WAMP's own internal PHP scripts. This "PHP CLI Version" has nothing to do with the version you wish to use for your scripts, Composer or anything else.
For your scripts to work with the version you require, you need to add it's path to the Users Environmental Path. You could add it to the Systems environmental Path but the Users Path is the recommended option.
From WAMP v3.1.2, it would display an error when it detect reference to a PHP path in the System or User Environmental Path. This was to stop confusion such as you were experiencing. Since v3.1.7 the display of this error can now be optionally displayed through a selection in the WampSettings menu.
As indicated in previous answers, adding an installed PHP path (such as "C:\wamp64\bin\php\php7.2.30") to the Users Environmental Path is the correct approach. PS: As the value of the Users Environmental Path is a string, all paths added must be separated with a semi-colon (;)
After experiencing the exact same problem (IE: Choosing which version of PHP I wanted Composer to use), I created a script which could easily and rapidly switch between PHP CLI Versions depending on what project I was working on.
The Windows batch script "WampServer-PHP-CLI-Version-Changer" can be found at https://github.com/custom-dev-tools/WampServer-PHP-CLI-Version-Changer
I hope this helps others.
Good luck.
You can record a macro that removes the first blank line, and positions the cursor correctly for the second line. Then you can repeat executing that macro.
you can directly set boolean value equivalent to any string by System class and access it anywhere..
System.setProperty("n","false");
System.setProperty("y","true");
System.setProperty("yes","true");
System.setProperty("no","false");
System.out.println(Boolean.getBoolean("n")); //false
System.out.println(Boolean.getBoolean("y")); //true
System.out.println(Boolean.getBoolean("no")); //false
System.out.println(Boolean.getBoolean("yes")); //true
Just a small modification that might actually solve the problem:
window.onload = function() {
if (window.jQuery) {
// jQuery is loaded
alert("Yeah!");
} else {
location.reload();
}
}
Instead of $(document).Ready(function()
use window.onload = function()
.
I prefer to concatenate multiple Strings together. This works either for echo AND for variables. Also some IDEs auto-initialize new lines if you hit enter. This Syntax also generate small output because there are much less whitespaces in the strings.
echo ''
.'one {'
.' color: red;'
.'}'
;
$foo = ''
.'<h1>' . $bar . '</h1>' // insert value of bar
.$bar // insert value of bar again
."<p>$bar</p>" // and again
."<p>You can also use Double-Quoted \t Strings for single lines. \n To use Escape Sequences.</p>"
// also you can insert comments in middle, which aren't in the string.
.'<p>Or to insert Escape Sequences in middle '."\n".' of a string</p>'
;
Normally i start with an empty string and then append bit by bit to it:
$foo = '';
$foo .= 'function sayHello()'
.' alert( "Hello" );'
."}\n";
$foo .= 'function sum( a , b )'
.'{'
.' return a + b ;'
."}\n";
(Please stop Posts like "uh. You answer to an five jears old Question." Why not? There are much people searching for an answer. And what's wrong to use five year old ideas? If they don't find "their" solution they would open a new Question. Then the first five answers are only "use the search function before you ask!" So. I give you another solution to solve problems like this.)
You can simply use the ID attribute to the form and attach the <textarea>
tag to the form like this:
<form name="commentform" action="#" method="post" target="_blank" id="1321">
<textarea name="forcom" cols="40" rows="5" form="1321" maxlength="188">
Enter your comment here...
</textarea>
<input type="submit" value="OK">
<input type="reset" value="Clear">
</form>
A method has already been devised, however this way you don't need a temp file.
for /f "delims=" %%i in ('command') do set output=%%i
However, I'm sure this has its own exceptions and limitations.
You can enable the "Profiler" in Laravel 3 by setting
'profiler' => true,
In your application/config/application.php
and application/config/database.php
This enables a bar at the bottom of each page. One of its features is listing the executed queries and how long each one took.
It depends on what you are comparing to None. Some classes have custom comparison methods that treat == None
differently from is None
.
In particular the output of a == None
does not even have to be boolean !! - a frequent cause of bugs.
For a specific example take a numpy array where the ==
comparison is implemented elementwise:
import numpy as np
a = np.zeros(3) # now a is array([0., 0., 0.])
a == None #compares elementwise, outputs array([False, False, False]), i.e. not boolean!!!
a is None #compares object to object, outputs False
Sorry for only commenting in the first place, but i'm posting almost every day a similar comment since many people think that it would be smart to encapsulate ADO.NET functionality into a DB-Class(me too 10 years ago). Mostly they decide to use static/shared objects since it seems to be faster than to create a new object for any action.
That is neither a good idea in terms of peformance nor in terms of fail-safety.
There's a good reason why ADO.NET internally manages the underlying Connections to the DBMS in the ADO-NET Connection-Pool:
In practice, most applications use only one or a few different configurations for connections. This means that during application execution, many identical connections will be repeatedly opened and closed. To minimize the cost of opening connections, ADO.NET uses an optimization technique called connection pooling.
Connection pooling reduces the number of times that new connections must be opened. The pooler maintains ownership of the physical connection. It manages connections by keeping alive a set of active connections for each given connection configuration. Whenever a user calls Open on a connection, the pooler looks for an available connection in the pool. If a pooled connection is available, it returns it to the caller instead of opening a new connection. When the application calls Close on the connection, the pooler returns it to the pooled set of active connections instead of closing it. Once the connection is returned to the pool, it is ready to be reused on the next Open call.
So obviously there's no reason to avoid creating,opening or closing connections since actually they aren't created,opened and closed at all. This is "only" a flag for the connection pool to know when a connection can be reused or not. But it's a very important flag, because if a connection is "in use"(the connection pool assumes), a new physical connection must be openend to the DBMS what is very expensive.
So you're gaining no performance improvement but the opposite. If the maximum pool size specified (100 is the default) is reached, you would even get exceptions(too many open connections ...). So this will not only impact the performance tremendously but also be a source for nasty errors and (without using Transactions) a data-dumping-area.
If you're even using static connections you're creating a lock for every thread trying to access this object. ASP.NET is a multithreading environment by nature. So theres a great chance for these locks which causes performance issues at best. Actually sooner or later you'll get many different exceptions(like your ExecuteReader requires an open and available Connection).
Conclusion:
using-statement
to dispose and close(in case of Connections) implicitelyThat's true not only for Connections(although most noticable). Every object implementing IDisposable
should be disposed(simplest by using-statement
), all the more in the System.Data.SqlClient
namespace.
All the above speaks against a custom DB-Class which encapsulates and reuse all objects. That's the reason why i commented to trash it. That's only a problem source.
Edit: Here's a possible implementation of your retrievePromotion
-method:
public Promotion retrievePromotion(int promotionID)
{
Promotion promo = null;
var connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["MainConnStr"].ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
var queryString = "SELECT PromotionID, PromotionTitle, PromotionURL FROM Promotion WHERE PromotionID=@PromotionID";
using (var da = new SqlDataAdapter(queryString, connection))
{
// you could also use a SqlDataReader instead
// note that a DataTable does not need to be disposed since it does not implement IDisposable
var tblPromotion = new DataTable();
// avoid SQL-Injection
da.SelectCommand.Parameters.Add("@PromotionID", SqlDbType.Int);
da.SelectCommand.Parameters["@PromotionID"].Value = promotionID;
try
{
connection.Open(); // not necessarily needed in this case because DataAdapter.Fill does it otherwise
da.Fill(tblPromotion);
if (tblPromotion.Rows.Count != 0)
{
var promoRow = tblPromotion.Rows[0];
promo = new Promotion()
{
promotionID = promotionID,
promotionTitle = promoRow.Field<String>("PromotionTitle"),
promotionUrl = promoRow.Field<String>("PromotionURL")
};
}
}
catch (Exception ex)
{
// log this exception or throw it up the StackTrace
// we do not need a finally-block to close the connection since it will be closed implicitely in an using-statement
throw;
}
}
}
return promo;
}
You are creating a set
via set(...)
call, and set
needs hashable items. You can't have set of lists. Because list's arent hashable.
[[(a,b) for a in range(3)] for b in range(3)]
is a list. It's not a hashable type. The __hash__
you saw in dir(...) isn't a method, it's just None.
A list comprehension returns a list, you don't need to explicitly use list there, just use:
>>> [[(a,b) for a in range(3)] for b in range(3)]
[[(0, 0), (1, 0), (2, 0)], [(0, 1), (1, 1), (2, 1)], [(0, 2), (1, 2), (2, 2)]]
Try those:
>>> a = {1, 2, 3}
>>> b= [1, 2, 3]
>>> type(a)
<class 'set'>
>>> type(b)
<class 'list'>
>>> {1, 2, []}
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
>>> print([].__hash__)
None
>>> [[],[],[]] #list of lists
[[], [], []]
>>> {[], [], []} #set of lists
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
Just use "justify-content-center" in the row's class attribute.
<div class="container">
<div class="row justify-content-center">
<h1>This is a header</h1>
</div>
</div>
You can use the bindParam
or bindValue
methods to help prepare your statement.
It makes things more clear on first sight instead of doing $check->execute(array(':name' => $name));
Especially if you are binding multiple values/variables.
Check the clear, easy to read example below:
$q = $db->prepare("SELECT id FROM table WHERE forename = :forename and surname = :surname LIMIT 1");
$q->bindValue(':forename', 'Joe');
$q->bindValue(':surname', 'Bloggs');
$q->execute();
if ($q->rowCount() > 0){
$check = $q->fetch(PDO::FETCH_ASSOC);
$row_id = $check['id'];
// do something
}
If you are expecting multiple rows remove the LIMIT 1
and change the fetch method into fetchAll
:
$q = $db->prepare("SELECT id FROM table WHERE forename = :forename and surname = :surname");// removed limit 1
$q->bindValue(':forename', 'Joe');
$q->bindValue(':surname', 'Bloggs');
$q->execute();
if ($q->rowCount() > 0){
$check = $q->fetchAll(PDO::FETCH_ASSOC);
//$check will now hold an array of returned rows.
//let's say we need the second result, i.e. index of 1
$row_id = $check[1]['id'];
// do something
}
for 2.13.3 and onwards,writing just bin in your .gitignore file should ignore the bin and all its subdirectories and files
bin
In the real world, scenario its not about calling a simple function but a function with a proper value. So let's dive in. This is the scenario A user has a requirement to fire an event from his own component and also at the end he wants to call a function of another component as well. Let's say the service file is the same for both the components
componentOne.html
<button (click)="savePreviousWorkDetail()" data-dismiss="modal" class="btn submit-but" type="button">
Submit
</button>
When the user clicks on the submit button he needs to call savePreviousWorkDetail() in its own component componentOne.ts and in the end he needs to call a function of another component as well. So to do that a function in a service class can be called from componentOne.ts and when that called, the function from componentTwo will be fired.
componentOne.ts
constructor(private httpservice: CommonServiceClass) {
}
savePreviousWorkDetail() {
// Things to be Executed in this function
this.httpservice.callMyMethod("Niroshan");
}
commontServiceClass.ts
import {Injectable,EventEmitter} from '@angular/core';
@Injectable()
export class CommonServiceClass{
invokeMyMethod = new EventEmitter();
constructor(private http: HttpClient) {
}
callMyMethod(params: any = 'Niroshan') {
this.invokeMyMethod.emit(params);
}
}
And Below is the componentTwo which has the function that needed to be called from componentOne. And in ngOnInit() we have to subscribe for the invoked method so when it triggers methodToBeCalled() will be called
componentTwo.ts
import {Observable,Subscription} from 'rxjs';
export class ComponentTwo implements OnInit {
constructor(private httpservice: CommonServiceClass) {
}
myMethodSubs: Subscription;
ngOnInit() {
this.myMethodSubs = this.httpservice.invokeMyMethod.subscribe(res => {
console.log(res);
this.methodToBeCalled();
});
methodToBeCalled(){
//what needs to done
}
}
}
You should not throw an ArithmeticException. Since the error is in the supplied arguments, throw an IllegalArgumentException
. As the documentation says:
Thrown to indicate that a method has been passed an illegal or inappropriate argument.
Which is exactly what is going on here.
if (divisor == 0) {
throw new IllegalArgumentException("Argument 'divisor' is 0");
}
Ok so your code actually works but what you need to do is replace a and b in your click function with the jquery notation you used before the click. This will ensure you have the correct and most up to date values. so changing your click function to this should work:
$("submit").on("click", function(){
var sum = $("#a").val().match(/\d+/) + $("#b").val().match(/\d+/);
alert(sum);
})
or inlined to:
$("submit").on("click", function(){
alert($("#a").val().match(/\d+/) + $("#b").val().match(/\d+/));
})
Here it goes what I've learned about the subject!
The CSS 2 specification did not address the problem of how form elements should be presented to users period!
Read here: smashing magazine
Eventually, you will never find any technical article from w3c or other addressed to this topic. Styling form elements in particular select boxes is not fully supported however, you can drive around... with some effort!
Don't waste time with hacks e such read the links and learn how pros get the job done!
Difference between app.use
& app.get
:
app.use
? It is generally used for introducing middlewares in your application and can handle all type of HTTP requests.
app.get
? It is only for handling GET HTTP requests.
Now, there is a confusion between app.use
& app.all
. No doubt, there is one thing common in them, that both can handle all kind of HTTP requests.
But there are some differences which recommend us to use app.use for middlewares and app.all for route handling.
app.use()
? It takes only one callback.
app.all()
? It can take multiple callbacks.
app.use()
will only see whether url starts with specified path.
But, app.all()
will match the complete path.
For example,
app.use( "/book" , middleware);
// will match /book
// will match /book/author
// will match /book/subject
app.all( "/book" , handler);
// will match /book
// won't match /book/author
// won't match /book/subject
app.all( "/book/*" , handler);
// won't match /book
// will match /book/author
// will match /book/subject
next()
call inside the app.use()
will call either the next middleware or any route handler, but next()
call inside app.all()
will invoke the next route handler (app.all()
, app.get/post/put...
etc.) only. If there is any middleware after, it will be skipped. So, it is advisable to put all the middlewares always above the route handlers.I was getting the issue 'Newtonsoft.Json' already has a dependency defined for 'Microsoft.CSharp'
on the TeamCity build server.
I changed the "Update Mode" of the Nuget Installer build step from solution file to packages.config and NuGet.exe to the latest version (I had 3.5.0) and it worked !!
Use this
unescape(str);
I'm not a great JS programmer, tried all, and this worked awesome!
Try:
String words[]=temp.split("\\.");
The method is:
String[] split(String regex)
"." is a reserved char in regex
In the beginning I was also having a bit of trouble figuring out how this works so I wanted to post a better explanation of what is actually going on.
According to my research the best way to handle things like this is using the Command Bindings. What happens is a "Message" is broadcast to everything in the program. So what you have to do is use the CommandBinding
. What this essentially does is say "When you hear this Message do this".
So in the Question the User is trying to Close the Window. The first thing we need to do is setup our Functions that will be called when the SystemCommand.CloseWindowCommand
is broadcast. Optionally you can assign a Function that determines if the Command should be executed. An example would be closing a Form and checking if the User has saved.
void CloseApp( object target, ExecutedRoutedEventArgs e ) {
/*** Code to check for State before Closing ***/
this.Close();
}
void CloseAppCanExecute( object sender, CanExecuteRoutedEventArgs e ) {
/*** Logic to Determine if it is safe to Close the Window ***/
e.CanExecute = true;
}
Now we need to setup the "Connection" between the SystemCommands.CloseWindowCommand
and the CloseApp
and CloseAppCanExecute
<Window.CommandBindings>
<CommandBinding Command="SystemCommands.CloseWindowCommand"
Executed="CloseApp"
CanExecute="CloseAppCanExecute"/>
</Window.CommandBindings>
You can omit the CanExecute if you know that the Command should be able to always be executed Save might be a good example depending on the Application. Here is a Example:
<Window.CommandBindings>
<CommandBinding Command="SystemCommands.CloseWindowCommand"
Executed="CloseApp"/>
</Window.CommandBindings>
Finally you need to tell the UIElement to send out the CloseWindowCommand.
<Button Command="SystemCommands.CloseWindowCommand">
Its actually a very simple thing to do, just setup the link between the Command and the actual Function to Execute then tell the Control to send out the Command to the rest of your program saying "Ok everyone run your Functions for the Command CloseWindowCommand".
This is actually a very nice way of handing this because, you can reuse the Executed Function all over without having a wrapper like you would with say WinForms (using a ClickEvent and calling a function within the Event Function) like:
protected override void OnClick(EventArgs e){
/*** Function to Execute ***/
}
In WPF you attach the Function to a Command and tell the UIElement to execute the Function attached to the Command instead.
I hope this clears things up...
Two things to keep in mind Content-Type and the Encoding
1) What if the file is css
if (/.(css)$/.test(path)) {
res.writeHead(200, {'Content-Type': 'text/css'});
res.write(data, 'utf8');
}
2) What if the file is jpg/png
if (/.(jpg)$/.test(path)) {
res.writeHead(200, {'Content-Type': 'image/jpg'});
res.end(data,'Base64');
}
Above one is just a sample code to explain the answer and not the exact code pattern.
I guess the thread that needs to be killed is either in any kind of waiting mode, or doing some heavy job. I would suggest using a "naive" way.
Define some global boolean:
std::atomic_bool stop_thread_1 = false;
Put the following code (or similar) in several key points, in a way that it will cause all functions in the call stack to return until the thread naturally ends:
if (stop_thread_1)
return;
Then to stop the thread from another (main) thread:
stop_thread_1 = true;
thread1.join ();
stop_thread_1 = false; //(for next time. this can be when starting the thread instead)
You can use the momentjs http://momentjs.com/ Library.
var moment = require('moment');
foo = new moment(something).add(10, 'm').toDate();
When less than 9 datasets:
colors = "bgrcmykw"
color_index = 0
for X,Y in data:
scatter(X,Y, c=colors[color_index])
color_index += 1
From application perspective, if one needs only to avoid duplicates then HashSet
is what you are looking for since it's Lookup, Insert and Remove complexities are O(1) - constant. What this means it does not matter how many elements HashSet
has it will take same amount of time to check if there's such element or not, plus since you are inserting elements at O(1) too it makes it perfect for this sort of thing.
When you #include
a header, it's exactly as if you put the code into the source file itself. In both cases the varGlobal
variable is defined in the source so it will work no matter how it's declared.
Also as pointed out in the comments, C++ variables at file scope are not static in scope even though they will be assigned to static storage. If the variable were a class member for example, it would need to be accessible to other compilation units in the program by default and non-class members are no different.
I use Windows Explorer, navigate to C:\Windows\assembly , find the one I need. From the Properties you can copy the PublicKeyToken.
This doesn't rely on Visual Studio or any other utilities being installed.
sed -n '16224,16482p' < dump.sql
response.writeHead(301,
{Location: 'http://whateverhostthiswillbe:8675/'+newRoom}
);
response.end();
Is better to relay in requestAnimationFrame
than in a setTimeout
. this is my solution in es6 modules and using Promises
.
es6, modules and promises:
// onElementReady.js
const onElementReady = $element => (
new Promise((resolve) => {
const waitForElement = () => {
if ($element) {
resolve($element);
} else {
window.requestAnimationFrame(waitForElement);
}
};
waitForElement();
})
);
export default onElementReady;
// in your app
import onElementReady from './onElementReady';
const $someElement = document.querySelector('.some-className');
onElementReady($someElement)
.then(() => {
// your element is ready
}
plain js and promises
:
var onElementReady = function($element) {
return new Promise((resolve) => {
var waitForElement = function() {
if ($element) {
resolve($element);
} else {
window.requestAnimationFrame(waitForElement);
}
};
waitForElement();
})
};
var $someElement = document.querySelector('.some-className');
onElementReady($someElement)
.then(() => {
// your element is ready
});
I implemented something like this, using pickle for persistance and using sha1 for short almost-certainly-unique IDs. Basically the cache hashed the code of the function and the hist of arguments to get a sha1 then looked for a file with that sha1 in the name. If it existed, it opened it and returned the result; if not, it calls the function and saves the result (optionally only saving if it took a certain amount of time to process).
That said, I'd swear I found an existing module that did this and find myself here trying to find that module... The closest I can find is this, which looks about right: http://chase-seibert.github.io/blog/2011/11/23/pythondjango-disk-based-caching-decorator.html
The only problem I see with that is it wouldn't work well for large inputs since it hashes str(arg), which isn't unique for giant arrays.
It would be nice if there were a unique_hash() protocol that had a class return a secure hash of its contents. I basically manually implemented that for the types I cared about.
There is an underlying buffer/stream that getchar()
and friends read from. When you enter text, the text is stored in a buffer somewhere. getchar()
can stream through it one character at a time. Each read returns the next character until it reaches the end of the buffer. The reason it's not asking you for subsequent characters is that it can fetch the next one from the buffer.
If you run your script and type directly into it, it will continue to prompt you for input until you press CTRL+D (end of file). If you call it like ./program < myInput
where myInput
is a text file with some data, it will get the EOF
when it reaches the end of the input. EOF
isn't a character that exists in the stream, but a sentinel value to indicate when the end of the input has been reached.
As an extra warning, I believe getchar()
will also return EOF
if it encounters an error, so you'll want to check ferror()
. Example below (not tested, but you get the idea).
main() {
int c;
do {
c = getchar();
if (c == EOF && ferror()) {
perror("getchar");
}
else {
putchar(c);
}
}
while(c != EOF);
}
In case you're working with a regular old System.Collections.IEnumerable
instead of IEnumerable<T>
you can use enumerable.Cast<object>().ToList()
Can use CSS to show error message only on error.
.form-group.has-error .help-block {
display: block;
}
.form-group .help-block {
display: none;
}
<div class="form-group has-error">
<label class="control-label" for="inputError">Input with error</label>
<input type="text" class="form-control" id="inputError">
<span class="help-block">Please correct the error</span>
</div>
Try this,
HtmlElement head = _windowManager.ActiveBrowser.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = _windowManager.ActiveBrowser.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
element.text = "window.onload = function() { document.forms[0].submit(); }";
head.AppendChild(scriptEl);
strAdditionalHeader = "";
_windowManager.ActiveBrowser.Document.InvokeScript("webBrowserControl");
To make use of an index before using the BINARY, you could do something like this if you have large tables.
SELECT
*
FROM
(SELECT * FROM `table` WHERE `column` = 'value') as firstresult
WHERE
BINARY `column` = 'value'
The subquery would result in a really small case-insensitive subset of which you then select the only case-sensitive match.
ls -t
list files by creation time not last modified time. Use ls -ltc
if you want to list files by last modified time from last to first(top to bottom). Thus to list the last n: ls -ltc | head ${n}
Maybe not as elegant but another possibility would be to write a formula to do the check and fill it in an adjacent column. You could then filter on that column.
The following looks in cell b14 and would return true for all the file types you mention. This assumes that the file extension is by itself in the column. If it's not it would be a little more complicated but you could still do it this way.
=OR(B14=".pdf",B14=".doc",B14=".docx",B14=".xls",B14=".xlsx",B14=".rtf",B14=".txt",B14=".csv",B14=".pps")
Like I said, not as elegant as the advanced filters but options are always good.
You don't need an array to do it.
var ItemNode = this.state.data.map(function(itemData) {
return (
<ComponentName title={itemData.title} key={itemData.id} number={itemData.id}/>
);
});
You are allowed to use IDs that start with a digit in your HTML5 documents:
The value must be unique amongst all the IDs in the element's home subtree and must contain at least one character. The value must not contain any space characters.
There are no other restrictions on what form an ID can take; in particular, IDs can consist of just digits, start with a digit, start with an underscore, consist of just punctuation, etc.
But querySelector
method uses CSS3 selectors for querying the DOM and CSS3 doesn't support ID selectors that start with a digit:
In CSS, identifiers (including element names, classes, and IDs in selectors) can contain only the characters [a-zA-Z0-9] and ISO 10646 characters U+00A0 and higher, plus the hyphen (-) and the underscore (_); they cannot start with a digit, two hyphens, or a hyphen followed by a digit.
Use a value like b22
for the ID attribute and your code will work.
Since you want to select an element by ID you can also use .getElementById
method:
document.getElementById('22')
Put my two cents in :
function convertSecondsToMinutesAndSeconds(seconds){
var minutes;
var seconds;
minutes = Math.floor(seconds/60);
seconds = seconds%60;
return [minutes, seconds];
}
So this :
var minutesAndSeconds = convertSecondsToMinutesAndSeconds(101);
Will have the following output :
[1,41];
Then you can print it like so :
console.log('TIME : ' + minutesSeconds[0] + ' minutes, ' + minutesSeconds[1] + ' seconds');
//TIME : 1 minutes, 41 seconds
Internally, the rm command must test for file existence anyway,
so why add another test? Just issue
rm filename
and it will be gone after that, whether it was there or not.
Use rm -f is you don't want any messages about non-existent files.
If you need to take some action if the file does NOT exist, then you must test for that yourself. Based on your example code, this is not the case in this instance.
Having the developer code signing id is correct for sure, but also make sure you device is added to the Member Center via organizer, or through the developer portal.
A few days ago I reset my device list, and today I was suddenly getting this for an iPod I debug with all the time. About 15 mins later I realized the problem.
A complete method tested on iOS 7 and iOS 8.
@interface UIViewController (MBOverCurrentContextModalPresenting)
/// @warning Some method of viewControllerToPresent will called twice before iOS 8, e.g. viewWillAppear:.
- (void)MBOverCurrentContextPresentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion;
@end
@implementation UIViewController (MBOverCurrentContextModalPresenting)
- (void)MBOverCurrentContextPresentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion {
UIViewController *presentingVC = self;
// iOS 8 before
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
UIViewController *root = presentingVC;
while (root.parentViewController) {
root = root.parentViewController;
}
[presentingVC presentViewController:viewControllerToPresent animated:YES completion:^{
[viewControllerToPresent dismissViewControllerAnimated:NO completion:^{
UIModalPresentationStyle orginalStyle = root.modalPresentationStyle;
if (orginalStyle != UIModalPresentationCurrentContext) {
root.modalPresentationStyle = UIModalPresentationCurrentContext;
}
[presentingVC presentViewController:viewControllerToPresent animated:NO completion:completion];
if (orginalStyle != UIModalPresentationCurrentContext) {
root.modalPresentationStyle = orginalStyle;
}
}];
}];
return;
}
UIModalPresentationStyle orginalStyle = viewControllerToPresent.modalPresentationStyle;
if (orginalStyle != UIModalPresentationOverCurrentContext) {
viewControllerToPresent.modalPresentationStyle = UIModalPresentationOverCurrentContext;
}
[presentingVC presentViewController:viewControllerToPresent animated:YES completion:completion];
if (orginalStyle != UIModalPresentationOverCurrentContext) {
viewControllerToPresent.modalPresentationStyle = orginalStyle;
}
}
@end
you can do this as below in typescript
const _params = {} as any;
_params.name ='nazeh abel'
since typescript does not behave like javascript so we have to make the type as any otherwise it won't allow you to assign property dynamically to an object
You can use a bind variable at the SQLPlus level to do this. Of course you have little control over the formatting of the output.
VAR x REFCURSOR;
EXEC GetGrantListByPI(args, :x);
PRINT x;
Generic parameters can only bind to reference types, not primitive types, so you need to use the corresponding wrapper types. Try HashMap<Character, Integer>
instead.
However, I'm having trouble figuring out why HashMap fails to be able to deal with primitive data types.
This is due to type erasure. Java didn't have generics from the beginning so a HashMap<Character, Integer>
is really a HashMap<Object, Object>
. The compiler does a bunch of additional checks and implicit casts to make sure you don't put the wrong type of value in or get the wrong type out, but at runtime there is only one HashMap
class and it stores objects.
Other languages "specialize" types so in C++, a vector<bool>
is very different from a vector<my_class>
internally and they share no common vector<?>
super-type. Java defines things though so that a List<T>
is a List
regardless of what T
is for backwards compatibility with pre-generic code. This backwards-compatibility requirement that there has to be a single implementation class for all parameterizations of a generic type prevents the kind of template specialization which would allow generic parameters to bind to primitives.
I know I'm a little late to the party, but I did want to throw some interjections. (I would have commented but not enough reputation points yet, so, here's a full answer).
This requires the latest version of VS Code, Azure Repo Extention, and Git to be installed.
Anyone looking to use the new VS Code (or using the preview like myself), when you go to the Settings (Still File -> Preferences -> Settings or CTRL+, ) you'll be looking under User Settings -> Extensions -> Azure Repos.
Then under Tfvc: Location you can paste the location of the executable.
For 2017 it'll be
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer\TF.exe
Or for 2019 (Preview)
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\Common7\IDE\CommonExtensions\Microsoft\TeamFoundation\Team Explorer\TF.exe
After adding the location, I closed my VS Code (not sure if this was needed) and went my git repo to copy the git URL.
After that, went back into VS Code went to the Command Palette (View -> Command Palette or CTRL+Shift+P) typed Git: Clone
pasted my repo:
Selected the location for the repo to be stored. Next was an error that popped up. I proceeded to follow this video which walked me through clicking on the Team button with the exclamation mark on the bottom of your VS Code Screen
Then chose the new method of authentication
Copy by using CTRL+C and then press enter. Your browser will launch a page where you'll enter the code you copied (CTRL+V).
Click Continue
Log in with your Microsoft Credentials and you should see a change on the bottom bar of VS Code.
Cheers!
I had all my settings covered in the accepted answer. The problem I had was that I was trying to update the Entity Framework entity type "Task" like:
public IHttpActionResult Post(Task task)
What worked for me was to create my own entity "DTOTask" like:
public IHttpActionResult Post(DTOTask task)
C11 standard (n1570) §6.2.2.3 al1 p55 says :
A pointer to
void
may be converted to or from a pointer to any object type. A pointer to any object type may be converted to a pointer to void and back again; the result shall compare equal to the original pointer.
You can use this generic pointer to store a pointer to any object type, but you can't use usual arithmetic operations with it and you can't deference it.
The url with /1.1/
in it is correct, it is the new Twitter API Version 1.1.
But you need an application and authorize your application (and the user) using oAuth.
Read more about this on the Twitter Developers documentation site :)
To get a third order polynomial in x (x^3), you can do
lm(y ~ x + I(x^2) + I(x^3))
or
lm(y ~ poly(x, 3, raw=TRUE))
You could fit a 10th order polynomial and get a near-perfect fit, but should you?
EDIT: poly(x, 3) is probably a better choice (see @hadley below).
Try putting your text in another div inside your span:
i.e.
<span><div>some text</div></span>
You should follow the Google guide;
ToggleButton toggle = (ToggleButton) findViewById(R.id.togglebutton);
toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
// The toggle is enabled
} else {
// The toggle is disabled
}
}
});
You can check the documentation here
You can add escaped double quotes like this: String name = "\"john\"";
if you want your check box to keep its height and width but only be invisible:
.hiddenCheckBox{
visibility: hidden;
}
if you want your check box to be invisible without any with and height:
.hiddenCheckBox{
display: none;
}
Try the Apache Commons HttpClient library instead of trying to roll your own: http://hc.apache.org/httpclient-3.x/index.html
From their sample code:
HttpClient httpclient = new HttpClient();
httpclient.getHostConfiguration().setProxy("myproxyhost", 8080);
/* Optional if authentication is required.
httpclient.getState().setProxyCredentials("my-proxy-realm", " myproxyhost",
new UsernamePasswordCredentials("my-proxy-username", "my-proxy-password"));
*/
PostMethod post = new PostMethod("https://someurl");
NameValuePair[] data = {
new NameValuePair("user", "joe"),
new NameValuePair("password", "bloggs")
};
post.setRequestBody(data);
// execute method and handle any error responses.
// ...
InputStream in = post.getResponseBodyAsStream();
// handle response.
/* Example for a GET reqeust
GetMethod httpget = new GetMethod("https://someurl");
try {
httpclient.executeMethod(httpget);
System.out.println(httpget.getStatusLine());
} finally {
httpget.releaseConnection();
}
*/
In a browser like Chrome etc.:
ctrl + shift + c
);overflow: visible
on body element (for e.g., <body style="overflow: visible">
)overflow
property:
backspace
on your keyboard to remove it.ctrl + z
to undo whatever code you delete, or hit refresh to start over).Good luck!
Use the tee
command:
echo "hello" | tee logfile.txt
Just adding another solution that works for me.. You can simply append it in the marker options:
var marker = new google.maps.Marker({
map: map,
position: position,
// Custom Attributes / Data / Key-Values
store_id: id,
store_address: address,
store_type: type
});
And then retrieve them with:
marker.get('store_id');
marker.get('store_address');
marker.get('store_type');
I have use mkcert to create infinites *.dev.net subdomains & localhost with valid HTTPS/SSL certs (Windows 10 XAMPP & Linux Debian 10 Apache2)
I create the certs on Windows with mkcert v1.4.0 (execute CMD as Administrator):
mkcert -install
mkcert localhost "*.dev.net"
This create in Windows 10 this files (I will install it first in Windows 10 XAMPP)
localhost+1.pem
localhost+1-key.pem
Overwrite the XAMPP default certs:
copy "localhost+1.pem" C:\xampp\apache\conf\ssl.crt\server.crt
copy "localhost+1-key.pem" C:\xampp\apache\conf\ssl.key\server.key
Now, in Apache2 for Debian 10, activate SSL & vhost_alias
a2enmod vhosts_alias
a2enmod ssl
a2ensite default-ssl
systemctl restart apache2
For vhost_alias add this Apache2 config:
nano /etc/apache2/sites-available/999-vhosts_alias.conf
With this content:
<VirtualHost *:80>
UseCanonicalName Off
ServerAlias *.dev.net
VirtualDocumentRoot "/var/www/html/%0/"
</VirtualHost>
Add the site:
a2ensite 999-vhosts_alias
Copy the certs to /root/mkcert by SSH and let overwrite the Debian ones:
systemctl stop apache2
mv /etc/ssl/certs/ssl-cert-snakeoil.pem /etc/ssl/certs/ssl-cert-snakeoil.pem.bak
mv /etc/ssl/private/ssl-cert-snakeoil.key /etc/ssl/private/ssl-cert-snakeoil.key.bak
cp "localhost+1.pem" /etc/ssl/certs/ssl-cert-snakeoil.pem
cp "localhost+1-key.pem" /etc/ssl/private/ssl-cert-snakeoil.key
chown root:ssl-cert /etc/ssl/private/ssl-cert-snakeoil.key
chmod 640 /etc/ssl/private/ssl-cert-snakeoil.key
systemctl start apache2
Edit the SSL config
nano /etc/apache2/sites-enabled/default-ssl.conf
At the start edit the file with this content:
<IfModule mod_ssl.c>
<VirtualHost *:443>
UseCanonicalName Off
ServerAlias *.dev.net
ServerAdmin webmaster@localhost
# DocumentRoot /var/www/html/
VirtualDocumentRoot /var/www/html/%0/
...
Last restart:
systemctl restart apache2
NOTE: don´t forget to create the folders for your subdomains in /var/www/html/
/var/www/html/subdomain1.dev.net
/var/www/html/subdomain2.dev.net
/var/www/html/subdomain3.dev.net
I think it will work
for (int i = 1; i <= broj_ds; i++ )
{
QuantityInIssueUnit_value = dr_art_line_2[i]["Column"];
QuantityInIssueUnit_uom = dr_art_line_2[i]["Column"];
}
I was looking for the onClick option to set the title and body of the modal based on the item in a list. T145's answer helped a lot, so I wanted to share how I used it.
Make sure the tag containing the JavaScript function is of type text/javascript to avoid conflicts:
<script type="text/javascript"> function showMyModalSetTitle(myTitle, myBodyHtml) {
/*
* '#myModayTitle' and '#myModalBody' refer to the 'id' of the HTML tags in
* the modal HTML code that hold the title and body respectively. These id's
* can be named anything, just make sure they are added as necessary.
*
*/
$('#myModalTitle').html(myTitle);
$('#myModalBody').html(myBodyHtml);
$('#myModal').modal('show');
}</script>
This function can now be called in the onClick method from inside an element such as a button:
<button type="button" onClick="javascript:showMyModalSetTitle('Some Title', 'Some body txt')"> Click Me! </button>
You can use also in the php file like this
<?php ini_set('upload_max_filesize', '200M'); ?>
for i,j in dictionary .items():
if i=='C1':
c=[]
for k in j:
j=k+10
c.append(j)
dictionary .update({i:c})
Do this:
box-shadow: 0 4px 2px -2px gray;
It's actually much simpler, whatever you set the blur to (3rd value), set the spread (4th value) to the negative of it.
There is one link where it elaborated very well & solution is also given. Try it if you got proper solution please post here so other can understand. Given solution is ok then like the post so other can try these solution.
for you reference original link :- https://bensonxion.wordpress.com/2012/05/07/serializing-an-ienumerable-produces-collection-was-modified-enumeration-operation-may-not-execute/
When we use .Net Serialization classes to serialize an object where its definition contains an Enumerable type, i.e. collection, you will be easily getting InvalidOperationException saying "Collection was modified; enumeration operation may not execute" where your coding is under multi-thread scenarios. The bottom cause is that serialization classes will iterate through collection via enumerator, as such, problem goes to trying to iterate through a collection while modifying it.
First solution, we can simply use lock as a synchronization solution to ensure that the operation to the List object can only be executed from one thread at a time. Obviously, you will get performance penalty that if you want to serialize a collection of that object, then for each of them, the lock will be applied.
Well, .Net 4.0 which makes dealing with multi-threading scenarios handy. for this serializing Collection field problem, I found we can just take benefit from ConcurrentQueue(Check MSDN)class, which is a thread-safe and FIFO collection and makes code lock-free.
Using this class, in its simplicity, the stuff you need to modify for your code are replacing Collection type with it, use Enqueue to add an element to the end of ConcurrentQueue, remove those lock code. Or, if the scenario you are working on do require collection stuff like List, you will need a few more code to adapt ConcurrentQueue into your fields.
BTW, ConcurrentQueue doesnât have a Clear method due to underlying algorithm which doesnât permit atomically clearing of the collection. so you have to do it yourself, the fastest way is to re-create a new empty ConcurrentQueue for a replacement.
You can't access a MySQL DB from Android natively. EDIT: Actually you may be able to use JDBC, but it is not recommended (or may not work?) ... see Android JDBC not working: ClassNotFoundException on driver
See
http://www.helloandroid.com/tutorials/connecting-mysql-database
Android cannot connect directly to the database server. Therefore we need to create a simple web service that will pass the requests to the database and will return the response.
http://codeoncloud.blogspot.com/2012/03/android-mysql-client.html
For most [good] users this might be fine. But imagine you get a hacker that gets a hold of your program. I've decompiled my own applications and its scary what I've seen. What if they get your username / password to your database and wreak havoc? Bad.
Here's a quick overview:
One last thing: If you declare Foo foo;
without assigning it you don't have to worry - nothing is leaked. If Foo is a reference type, nothing was created. If Foo is a value type, it is allocated on the stack and thus will automatically be cleaned up.
Get-ChildItem "D:\Server\User\CUST\MEA\Data\In\Files\CORRECTED\CUST_MEAFile.csv"
|Select-Object -ExpandProperty Name
Come on guys, there is no need to loop, just use simple math to solve this equation system:
a*b = i;
a+b = j;
a = j/b;
a = i-b;
j/b = i-b; so:
b + j/b + i = 0
b^2 + i*b + j = 0
From here, its a quadratic equation, and it's trivial to find b (just implement the quadratic equation formula) and from there get the value for a.
EDIT:
There you go:
function finder($add,$product)
{
$inside_root = $add*$add - 4*$product;
if($inside_root >=0)
{
$b = ($add + sqrt($inside_root))/2;
$a = $add - $b;
echo "$a+$b = $add and $a*$b=$product\n";
}else
{
echo "No real solution\n";
}
}
Real live action:
For a string specifically, the quickest way is to use the StringContent constructor
response.Content = new StringContent("Your response text");
There are a number of additional HttpContent class descendants for other common scenarios.
This is a Python 101 type question,
It's a simple question but one where the answer is not so simple.
In python3, a "bytes" object represents a sequence of bytes, a "string" object represents a sequence of unicode code points.
To convert between from "bytes" to "string" and from "string" back to "bytes" you use the bytes.decode and string.encode functions. These functions take two parameters, an encoding and an error handling policy.
Sadly there are an awful lot of cases where sequences of bytes are used to represent text, but it is not necessarily well-defined what encoding is being used. Take for example filenames on unix-like systems, as far as the kernel is concerned they are a sequence of bytes with a handful of special values, on most modern distros most filenames will be UTF-8 but there is no gaurantee that all filenames will be.
If you want to write robust software then you need to think carefully about those parameters. You need to think carefully about what encoding the bytes are supposed to be in and how you will handle the case where they turn out not to be a valid sequence of bytes for the encoding you thought they should be in. Python defaults to UTF-8 and erroring out on any byte sequence that is not valid UTF-8.
print(bytesThing)
Python uses "repr" as a fallback conversion to string. repr attempts to produce python code that will recreate the object. In the case of a bytes object this means among other things escaping bytes outside the printable ascii range.
If you don't want to use a heavy dependency for something solvable in 15 lines of code, use the built in OpenSSL functions. Most PHP installations come with OpenSSL, which provides fast, compatible and secure AES encryption in PHP. Well, it's secure as long as you're following the best practices.
The following code:
IV is a public information and needs to be random for each message. The hash ensures that the data hasn't been tampered with.
function encrypt($plaintext, $password) {
$method = "AES-256-CBC";
$key = hash('sha256', $password, true);
$iv = openssl_random_pseudo_bytes(16);
$ciphertext = openssl_encrypt($plaintext, $method, $key, OPENSSL_RAW_DATA, $iv);
$hash = hash_hmac('sha256', $ciphertext . $iv, $key, true);
return $iv . $hash . $ciphertext;
}
function decrypt($ivHashCiphertext, $password) {
$method = "AES-256-CBC";
$iv = substr($ivHashCiphertext, 0, 16);
$hash = substr($ivHashCiphertext, 16, 32);
$ciphertext = substr($ivHashCiphertext, 48);
$key = hash('sha256', $password, true);
if (!hash_equals(hash_hmac('sha256', $ciphertext . $iv, $key, true), $hash)) return null;
return openssl_decrypt($ciphertext, $method, $key, OPENSSL_RAW_DATA, $iv);
}
Usage:
$encrypted = encrypt('Plaintext string.', 'password'); // this yields a binary string
echo decrypt($encrypted, 'password');
// decrypt($encrypted, 'wrong password') === null
edit: Updated to use hash_equals
and added IV to the hash.
A simple, recursive method with only 1 function and using an array of values:
class TreeNode(object):
def __init__(self, value: int, left=None, right=None):
super().__init__()
self.value = value
self.left = left
self.right = right
def __str__(self):
return str(self.value)
def create_node(values, lower, upper) -> TreeNode:
if lower > upper:
return None
index = (lower + upper) // 2
value = values[index]
node = TreeNode(value=value)
node.left = create_node(values, lower, index - 1)
node.right = create_node(values, index + 1, upper)
return node
def print_bst(node: TreeNode):
if node:
# Simple pre-order traversal when printing the tree
print("node: {}".format(node))
print_bst(node.left)
print_bst(node.right)
if __name__ == '__main__':
vals = [0, 1, 2, 3, 4, 5, 6]
bst = create_node(vals, lower=0, upper=len(vals) - 1)
print_bst(bst)
As you can see, we really only need 1 method, which is recursive: create_node
. We pass in the full values
array in each create_node
method call, however, we update the lower
and upper
index values every time that we make the recursive call.
Then, using the lower
and upper
index values, we calculate the index
value of the current node and capture it in value
. This value
is the value for the current node, which we use to create a node.
From there, we set the values of left
and right
by recursively calling the function, until we reach the end state of the recursion call when lower
is greater than upper
.
Important: we update the value of upper
when creating the left
side of the tree. Conversely, we update the value of lower
when creating the right
side of the tree.
Hopefully this helps!
Deprecated features in PHP 5.5.x
The original MySQL extension is now deprecated, and will generate E_DEPRECATED
errors when connecting to a database. Instead, use the **MYSQLi or PDO_MySQL extensions.**
Syntax:
<?php
$connect = mysqli_connect('localhost', 'user', 'password', 'dbname');
Also, replace all mysql_*
functions into mysqli_*
functions
instead of
<?php
$connect = mysql_connect('localhost','root','');
mysql_select_db('dbname');
?>
ALTER FUNCTION [dbo].[split_string](
@delimited NVARCHAR(MAX),
@delimiter NVARCHAR(100)
) RETURNS @t TABLE (id INT IDENTITY(1,1), val NVARCHAR(MAX))
AS
BEGIN
DECLARE @xml XML
SET @xml = N'<t>' + REPLACE(@delimited,@delimiter,'</t><t>') + '</t>'
INSERT INTO @t(val)
SELECT r.value('.','varchar(MAX)') as item
FROM @xml.nodes('/t') as records(r)
RETURN
END
While this usage of the PageName property on an object does in fact allow you to customize the exported sheet names in Excel, be warned that it can also update your report's namespace definitions, which could affect the ability to redeploy the report to your server.
I had a report that I applied this to within BIDS and it updated my namespace from 2008 to 2010. When I tried to publish the report to a 2008R2 report server, I got an error that the namespace was not valid and had to revert everything back. I am sure that my circumstance may be unique and perhaps this won't always happen, but I thought it worthy to post about. Once I found the problem, this page helped to revert the namespace back (There are tags that must also be removed in addition to resetting the namespace):
An abstract class is a type of class that can only be used as a base class for another class; such thus cannot be instantiated. To make a class abstract, the keyword abstract is used. Abstract classes may have one or more abstract methods that only have a header line (no method body). The method header line ends with a semicolon (;). Any class that is derived from the base class can define the method body in a way that is consistent with the header line using all the designated parameters and returning the correct data type (if the return type is not void). An abstract method acts as a place holder; all derived classes are expected to override and complete the method.
Example in Java
abstract public class Shape
{
double area;
public abstract double getArea();
}
Allow me to say yes there is definitely a difference, taking into consideration the scope of performance (Out of the box definition):
1- Using surrogate int is faster in application because you do not need to use ToUpper(), ToLower(), ToUpperInvarient(), or ToLowerInvarient() in your code or in your query and these 4 functions have different performance benchmarks. See Microsoft performance rules on this. (performance of application)
2- Using surrogate int guarantees not changing the key over time. Even country codes may change, see Wikipedia how ISO codes changed over time. That would take lots of time to change the primary key for subtrees. (performance of data maintenance)
3- It seems there are issues with ORM solutions, such as NHibernate when PK/FK is not int. (developer performance)
I think to add timestamp to every record and get the latest. In this situation you can get any ids, pack rows and other ops.
For scientific python users, here is a simple solution using Pandas:
import pandas as pd
stats = {'a': 1000, 'b': 3000, 'c': 100}
series = pd.Series(stats)
series.idxmax()
>>> b
The call to InitializeComponent()
(which is usually called in the default constructor of at least Window
and UserControl
) is actually a method call to the partial class of the control (rather than a call up the object hierarchy as I first expected).
This method locates a URI to the XAML for the Window
/UserControl
that is loading, and passes it to the System.Windows.Application.LoadComponent()
static method. LoadComponent()
loads the XAML file that is located at the passed in URI, and converts it to an instance of the object that is specified by the root element of the XAML file.
In more detail, LoadComponent
creates an instance of the XamlParser
, and builds a tree of the XAML. Each node is parsed by the XamlParser.ProcessXamlNode()
. This gets passed to the BamlRecordWriter
class. Some time after this I get a bit lost in how the BAML is converted to objects, but this may be enough to help you on the path to enlightenment.
Note: Interestingly, the InitializeComponent
is a method on the System.Windows.Markup.IComponentConnector
interface, of which Window
/UserControl
implement in the partial generated class.
Hope this helps!