DECLARE @dd VARCHAR(200) = 'Net Operating Loss - 2007';
SELECT SUBSTRING(@dd, 1, CHARINDEX('-', @dd) -1) F1,
SUBSTRING(@dd, CHARINDEX('-', @dd) +1, LEN(@dd)) F2
Those of you who work with google closure library, have at their disposal goog.array.removeDuplicates
, which is the same as unique. It changes the array itself, though.
2009: JavaDecompiler can do a good job with a jar: since 0.2.5, All files, in JAR files, are displayed.
See also the question "How do I “decompile” Java class files?".
The JD-Eclipse doesn't seem to have changed since late 2009 though (see Changes).
So its integration with latest Eclipse (3.8, 4.2+) might be problematic.
JD-Core is actively maintained.
Both are the result of the fantastic work of (SO user) Emmanuel Dupuy.
2018: A more modern option, mentioned in the comments by David Kennedy Araujo:
JetBrains/intellij-community/plugins/java-decompiler/engine
Fernflower is the first actually working analytical decompiler for Java and probably for a high-level programming language in general.
java -jar fernflower.jar [-<option>=<value>]* [<source>]+ <destination> java -jar fernflower.jar -hes=0 -hdc=0 c:\Temp\binary\ -e=c:\Java\rt.jar c:\Temp\source\
See also How to decompile to java files intellij idea for a command working with recent IntelliJ IDEA.
This is the complex (curly) syntax for string interpolation. From the manual:
Complex (curly) syntax
This isn't called complex because the syntax is complex, but because it allows for the use of complex expressions.
Any scalar variable, array element or object property with a string representation can be included via this syntax. Simply write the expression the same way as it would appear outside the string, and then wrap it in
{
and}
. Since{
can not be escaped, this syntax will only be recognised when the$
immediately follows the{
. Use{\$
to get a literal{$
. Some examples to make it clear:<?php // Show all errors error_reporting(E_ALL); $great = 'fantastic'; // Won't work, outputs: This is { fantastic} echo "This is { $great}"; // Works, outputs: This is fantastic echo "This is {$great}"; echo "This is ${great}"; // Works echo "This square is {$square->width}00 centimeters broad."; // Works, quoted keys only work using the curly brace syntax echo "This works: {$arr['key']}"; // Works echo "This works: {$arr[4][3]}"; // This is wrong for the same reason as $foo[bar] is wrong outside a string. // In other words, it will still work, but only because PHP first looks for a // constant named foo; an error of level E_NOTICE (undefined constant) will be // thrown. echo "This is wrong: {$arr[foo][3]}"; // Works. When using multi-dimensional arrays, always use braces around arrays // when inside of strings echo "This works: {$arr['foo'][3]}"; // Works. echo "This works: " . $arr['foo'][3]; echo "This works too: {$obj->values[3]->name}"; echo "This is the value of the var named $name: {${$name}}"; echo "This is the value of the var named by the return value of getName(): {${getName()}}"; echo "This is the value of the var named by the return value of \$object->getName(): {${$object->getName()}}"; // Won't work, outputs: This is the return value of getName(): {getName()} echo "This is the return value of getName(): {getName()}"; ?>
Often, this syntax is unnecessary. For example, this:
$a = 'abcd';
$out = "$a $a"; // "abcd abcd";
behaves exactly the same as this:
$out = "{$a} {$a}"; // same
So the curly braces are unnecessary. But this:
$out = "$aefgh";
will, depending on your error level, either not work or produce an error because there's no variable named $aefgh
, so you need to do:
$out = "${a}efgh"; // or
$out = "{$a}efgh";
Depending on how robust/flexible you want your implementation to be, this can actually be a bit tricky. Here's the implementation I use:
public static class StringExtensions {
/// <summary>
/// takes a substring between two anchor strings (or the end of the string if that anchor is null)
/// </summary>
/// <param name="this">a string</param>
/// <param name="from">an optional string to search after</param>
/// <param name="until">an optional string to search before</param>
/// <param name="comparison">an optional comparison for the search</param>
/// <returns>a substring based on the search</returns>
public static string Substring(this string @this, string from = null, string until = null, StringComparison comparison = StringComparison.InvariantCulture)
{
var fromLength = (from ?? string.Empty).Length;
var startIndex = !string.IsNullOrEmpty(from)
? @this.IndexOf(from, comparison) + fromLength
: 0;
if (startIndex < fromLength) { throw new ArgumentException("from: Failed to find an instance of the first anchor"); }
var endIndex = !string.IsNullOrEmpty(until)
? @this.IndexOf(until, startIndex, comparison)
: @this.Length;
if (endIndex < 0) { throw new ArgumentException("until: Failed to find an instance of the last anchor"); }
var subString = @this.Substring(startIndex, endIndex - startIndex);
return subString;
}
}
// usage:
var between = "a - to keep x more stuff".Substring(from: "-", until: "x");
// returns " to keep "
This also works for https needed a solution to making project directories this was it. because chrome doesn't like non ssl anymore used free ssl. Notice: My Web Server is Wamp64 on Windows 10 so I wouldn't use this config because of variables unless your using wamp.
<VirtualHost *:443>
ServerAdmin [email protected]
ServerName test.com
ServerAlias *.test.com
SSLEngine On
SSLCertificateFile "conf/key/certificatecom.crt"
SSLCertificateKeyFile "conf/key/privatecom.key"
VirtualDocumentRoot "${INSTALL_DIR}/www/subdomains/%1/"
DocumentRoot "${INSTALL_DIR}/www/subdomains"
<Directory "${INSTALL_DIR}/www/subdomains/">
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Require all granted
</Directory>
I liked the look of WenhaoWuI's idea above, but I needed to identify the div with class .ui-tree
in the PrimeNG tree component to set the height dynamically.
All the answers I could find required the div to be named (ie #treediv) to enable the use of @ViewChild()
, @ViewChildren()
, @ContentChild()
, @ContentChilden()
etc. This was messy with a third party component.
I finally found a snippet from Günter Zöchbauer :
ngAfterViewInit() {
this.elRef.nativeElement.querySelector('.myClass');
}
This made it easy:
@Input() height: number;
treeheight: number = 400; //default value
constructor(private renderer: Renderer2, private elRef: ElementRef) { }
ngOnInit() {
this.loading = true;
if (this.height != null) {
this.treeheight = this.height;
}
}
ngAfterViewInit() {
this.renderer.setStyle(this.elRef.nativeElement.querySelector('.ui-tree'), 'height', this.treeheight + "px");
}
Normally when querying a database with SQL and then fill a data-table with its results, it will never be a null Data table. You have the column headers filled with column information even if you returned 0 records.When one tried to process a data table with 0 records but with column information it will throw exception.To check the datatable before processing one could check like this.
if (DetailTable != null && DetailTable.Rows.Count>0)
You can't use variable names to bind columns or other system objects, you need dynamic sql
DECLARE @value varchar(10)
SET @value = 'intStep'
DECLARE @sqlText nvarchar(1000);
SET @sqlText = N'SELECT ' + @value + ' FROM dbo.tblBatchDetail'
Exec (@sqlText)
Below is a script adapted from @Zeelot 's answer. It should remove the history from all branches, not just the master branch:
for BR in $(git branch); do
git checkout $BR
git checkout --orphan ${BR}_temp
git commit -m "Initial commit"
git branch -D $BR
git branch -m $BR
done;
git gc --aggressive --prune=all
It worked for my purposes (I am not using submodules).
Looks like the secret key isn't on the other machine, so even with the right passphrase (read from a file) it wouldn't work.
These options should work, to
A few useful looking options from man gpg
:
--export
Either export all keys from all keyrings (default keyrings and those registered via option--keyring
), or if at least one name is given, those of the given name. The new keyring is written to STDOUT or to the file given with option--output
. Use together with--armor
to mail those keys.
--export-secret-keys
Same as--export
, but exports the secret keys instead.
--import
--fast-import
Import/merge keys. This adds the given keys to the keyring. The fast version is currently just a synonym.
And maybe
--keyring file
Add file to the current list of keyrings. If file begins with a tilde and a slash, these are replaced by the $HOME directory. If the file- name does not contain a slash, it is assumed to be in the GnuPG home directory ("~/.gnupg" if --homedir or $GNUPGHOME is not used).Note that this adds a keyring to the current list. If the intent is to use the specified keyring alone, use
--keyring
along with--no-default-keyring
.
--secret-keyring file
Same as--keyring
but for the secret keyrings.
A method taking a delegate can provide multiple values to the caller. This borrows from my answer here and uses a little bit from Hadas's accepted answer.
delegate void ValuesDelegate(int upVotes, int comments);
void GetMultipleValues(ValuesDelegate callback)
{
callback(1, 2);
}
Callers provide a lambda (or a named function) and intellisense helps by copying the variable names from the delegate.
GetMultipleValues((upVotes, comments) =>
{
Console.WriteLine($"This post has {upVotes} Up Votes and {comments} Comments.");
});
use the scan method e.g.
curl -XGET 'localhost:9200/_search?search_type=scan&scroll=10m&size=50' -d '
{
"query" : {
"match_all" : {}
}
}
see here
You can specify minDate as today by adding minDate: 0
to the options.
$("input.DateFrom").datepicker({
minDate: 0,
...
});
bundle install --path vendor/cache
generally fixes it as that is the more common problem. Basically, your bundler path configuration is messed up. See their documentation (first paragraph) for where to find those configurations and change them manually if needed.
def datetime_to_epoch(d1):
# create 1,1,1970 in same timezone as d1
d2 = datetime(1970, 1, 1, tzinfo=d1.tzinfo)
time_delta = d1 - d2
ts = int(time_delta.total_seconds())
return ts
def epoch_to_datetime_string(ts, tz_name="UTC"):
x_timezone = timezone(tz_name)
d1 = datetime.fromtimestamp(ts, x_timezone)
x = d1.strftime("%d %B %Y %H:%M:%S")
return x
I believe the error code indicates that the response was empty, (as not even headers were returned). This means the connection was accepted and then closed gracefully (TCP FIN). There are a number of things which could cause this, but based off of your description, some form of firewall seems the most likely culprit.
I also received this error when I named one of my component inputs 'formControl'. Probably it's reserved for something else. If you want to pass FormControl object between components, use it like that:
@Input() control: FormControl;
not like this:
@Input() formControl: FormControl;
Weird - but working :)
Generally speaking, this is better accomplished with an object instead since JavaScript doesn't really have associative arrays:
var foo = { bar: 0 };
Then use in
to check for a key:
if ( !( 'bar' in foo ) ) {
foo['bar'] = 42;
}
As was rightly pointed out in the comments below, this method is useful only when your keys will be strings, or items that can be represented as strings (such as numbers).
This works for me in Kotlin:
when(list.get(0)).thenThrow(new ArrayIndexOutOfBoundsException());
Note : Throw any defined exception other than Exception()
At an outset what I can say is - Agile is an evolutionary methodology from Unified Process which focuses on Iterative & Incremental Development (IID). IID emphasizes iterative development more on construction phases (actual coding) and incremental deliveries. It wouldn't emphasize more on Requirements Analysis (Inception) and Design (Elaboration) being handled in the iterations itself. So, Iteration here is not a "mini project by itself".
In Agile, we take this IDD a bit further, adding more realities like Team Collaboration, Evolutionary Requirements and Design etc. And SCRUM is the tool to enable it by considering the human factors and building around 'Wisdom of the Group' principle. So, Sprint here is a "mini project by itself" bettering a pure IID model.
So, iterations implemented in Agile way are, yes, theoretically Sprints (highlighting the size of the iterations being small and deliveries being quick). I don't really differentiate between Agile and SCRUM and I see that SCRUM is a natural way of putting the Agile principles into use.
What is ARIA?
ARIA emerged as a way to address the accessibility problem of using a markup language intended for documents, HTML, to build user interfaces (UI). HTML includes a great many features to deal with documents (P, h3,UL,TABLE) but only basic UI elements such as A, INPUT and BUTTON. Windows and other operating systems support APIs that allow (Assistive Technology) AT to access the functionality of UI controls. Internet Explorer and other browsers map the native HTML elements to the accessibility API, but the html controls are not as rich as the controls common on desktop operating systems, and are not enough for modern web applications Custom controls can extend html elements to provide the rich UI needed for modern web applications. Before ARIA, the browser had no way to expose this extra richness to the accessibility API or AT. The classic example of this issue is adding a click handler to an image. It creates what appears to be a clickable button to a mouse user, but is still just an image to a keyboard or AT user.
The solution was to create a set of attributes that allow developers to extend HTML with UI semantics. The ARIA term for a group of HTML elements that have custom functionality and use ARIA attributes to map these functions to accessibility APIs is a “Widget. ARIA also provides a means for authors to document the role of content itself, which in turn, allows AT to construct alternate navigation mechanisms for the content that are much easier to use than reading the full text or only iterating over a list of the links.
It is important to remember that in simple cases, it is much preferred to use native HTML controls and style them rather than using ARIA. That is don’t reinvent wheels, or checkboxes, if you don’t have to.
Fortunately, ARIA markup can be added to existing sites without changing the behavior for mainstream users. This greatly reduces the cost of modifying and testing the website or application.
Here is an example to fully programmatically:
I am using the following class vars:
Spinner varSpinner;
List<String> varSpinnerData;
float varScaleX;
float varScaleY;
A - Init and render the Spinner (varRoot is a pointer to my main Activity):
public void renderSpinner() {
List<String> myArraySpinner = new ArrayList<String>();
myArraySpinner.add("red");
myArraySpinner.add("green");
myArraySpinner.add("blue");
varSpinnerData = myArraySpinner;
Spinner mySpinner = new Spinner(varRoot);
varSpinner = mySpinner;
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(varRoot, android.R.layout.simple_spinner_item, myArraySpinner);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down vieww
mySpinner.setAdapter(spinnerArrayAdapter);
B - Resize and Add the Spinner to my View:
FrameLayout.LayoutParams myParamsLayout = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
myParamsLayout.gravity = Gravity.NO_GRAVITY;
myParamsLayout.leftMargin = (int) (100 * varScaleX);
myParamsLayout.topMargin = (int) (350 * varScaleY);
myParamsLayout.width = (int) (300 * varScaleX);;
myParamsLayout.height = (int) (60 * varScaleY);;
varLayoutECommerce_Dialogue.addView(mySpinner, myParamsLayout);
C - Make the Click handler and use this to set the font.
mySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int myPosition, long myID) {
Log.i("renderSpinner -> ", "onItemSelected: " + myPosition + "/" + myID);
((TextView) parentView.getChildAt(0)).setTextColor(Color.GREEN);
((TextView) parentView.getChildAt(0)).setTextSize(TypedValue.COMPLEX_UNIT_PX, (int) (varScaleY * 22.0f) );
((TextView) parentView.getChildAt(0)).setPadding(1,1,1,1);
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
}
D - Update the Spinner with new data:
private void updateInitSpinners(){
String mySelected = varSpinner.getSelectedItem().toString();
Log.i("TPRenderECommerce_Dialogue -> ", "updateInitSpinners -> mySelected: " + mySelected);
varSpinnerData.clear();
varSpinnerData.add("Hello World");
varSpinnerData.add("Hello World 2");
((BaseAdapter) varSpinner.getAdapter()).notifyDataSetChanged();
varSpinner.invalidate();
varSpinner.setSelection(1);
}
}
What I have not been able to solve in the updateInitSpinners, is to do varSpinner.setSelection(0); and have the custom font settings activated automatically.
UPDATE:
This "ugly" solution solves the varSpinner.setSelection(0); issue, but I am not very happy with it:
private void updateInitSpinners(){
String mySelected = varSpinner.getSelectedItem().toString();
Log.i("TPRenderECommerce_Dialogue -> ", "updateInitSpinners -> mySelected: " + mySelected);
varSpinnerData.clear();
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(varRoot, android.R.layout.simple_spinner_item, varSpinnerData);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
varSpinner.setAdapter(spinnerArrayAdapter);
varSpinnerData.add("Hello World");
varSpinnerData.add("Hello World 2");
((BaseAdapter) varSpinner.getAdapter()).notifyDataSetChanged();
varSpinner.invalidate();
varSpinner.setSelection(0);
}
}
Hope this helps......
You can also do something like this
date(cast('2016-03-22 15:19:34.0' as timestamp))
Here is what I use when adding validation to form:
// Adding validation to form.
$(form).validate({
rules: {
title: {
required: true,
minlength: 3,
},
server: {
ipAddress: true,
required: true
}
},
highlight: function(element) {
$(element).closest('.form-group').removeClass('has-success').addClass('has-error');
},
success: function(element) {
$(element).closest('.form-group').removeClass('has-error').addClass('has-success');
},
errorClass: 'help-block'
});
This worked for me for Bootstrap 3 styling when using the jquery validation library.
The broken pipe error usually occurs if your request is blocked or takes too long and after request-side timeout, it'll close the connection and then, when the respond-side (server) tries to write to the socket, it will throw a pipe broken error.
In my case the select2 would open correctly if there was zero or more pills.
But if there was one or more pills, and I deleted them all, it would shrink to the smallest width. My solution was simply:
$("#myselect").select2({ width: '100%' });
AngelBlueSky's answer worked partially for me. I had to execute these additional lines to clean the Git global configuration after step 4:
git config --global credential.helper wincred
git config http.sslcainfo "C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt"
git config --global --unset core.askpass
git config --global --unset mergetool.vsdiffmerge.keepbackup
git config --global --unset mergetool.vsdiffmerge.trustexitcode
git config --global --unset mergetool.vsdiffmerge.cmd
git config --global --unset mergetool.prompt
git config --global --unset merge.tool
git config --global --unset difftool.vsdiffmerge.keepbackup
git config --global --unset difftool.vsdiffmerge.cmd
git config --global --unset difftool.prompt
git config --global --unset diff.tool
Then git config -l
(executed from any git repo) should return only this:
core.symlinks=false
core.autocrlf=false
core.fscache=true
color.diff=auto
color.status=auto
color.branch=auto
color.interactive=true
help.format=html
diff.astextplain.textconv=astextplain
rebase.autosquash=true
user.name=xxxxxxxxxxxx
[email protected]
credential.helper=wincred
core.bare=false
core.filemode=false
core.symlinks=false
core.ignorecase=true
core.logallrefupdates=true
core.repositoryformatversion=0
remote.origin.url=https://[email protected]/xxx/xxx.git
remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
branch.master.remote=origin
branch.master.merge=refs/heads/master
branch.identityserver.remote=origin
branch.identityserver.merge=refs/heads/identityserver
http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt
Run the git status
and git fetch
commands to validate that it works from the command line.
Then go to Visual Studio, where your repositories should be back, and all sync/push/pull should work without issues.
Another method would be to do it sooner. You can create a Boolean variable and set it to true once you load data to the array. so all you really need is a simple if statement of when you load data into the array.
Swift 4
How about this small trick?
func showToast(controller: UIViewController, message : String, seconds: Double) {
let alert = UIAlertController(title: nil, message: message, preferredStyle: .alert)
alert.view.backgroundColor = UIColor.black
alert.view.alpha = 0.6
alert.view.layer.cornerRadius = 15
controller.present(alert, animated: true)
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + seconds) {
alert.dismiss(animated: true)
}
}
Example of calling:
showToast(controller: self, message : "This is a test", seconds: 2.0)
Output:
Another reply to your questions (assuming you are on master and already did "git fetch origin" to make you repo aware about remote changes):
1) Commits on remote branch since when local branch was created:
git diff HEAD...origin/master
2) I assume by "working copy" you mean your local branch with some local commits that are not yet on remote. To see the differences of what you have on your local branch but that does not exist on remote branch run:
git diff origin/master...HEAD
3) See the answer by dbyrne.
There is already an extension to do this.
namespace System.Reflection
{
// Summary:
// Contains static methods for retrieving custom attributes.
public static class CustomAttributeExtensions
{
public static T GetCustomAttribute<T>(this MemberInfo element, bool inherit) where T : Attribute;
}
}
So:
var attr = typeof(MyClass).GetCustomAttribute<DomainNameAttribute>(false);
return attr != null ? attr.DomainName : "";
<section ng-controller="testController as ctrl" class="test_cls" data-ng-init="fn_load()">
$scope.fn_load = function () {
console.log("page load")
};
Check out fontsquirrel. They have a web font generator, which will also spit out a suitable stylesheet for your font (look for "@font-face kit"). This stylesheet can be included in your own, or you can use it as a template.
You need to remember that IQueryable queries are not actually executed against the data store until you enumerate them.
using (var dataContext = new dataContext())
{
This line of code doesn't actually do anything other than build the SQL statement
users = dataContext.Users.Where(x => x.AccountID == accountId && x.IsAdmin == false);
.Any() is an operation that enumerates the IQueryable, so the SQL is sent to the data source (through dataContext), and then the .Any() operations is executed against it
if(users.Any() == false)
{
return null;
}
}
Your "problem" line is reusing the sql built above, and then doing an additional operation (.Select()), which just adds to the query. If you left it here, no exception, except your problem line
return users.Select(x => x.ToInfo()).ToList(); // this line is the problem
calls .ToList(), which enumerates the IQueryable, which causes the SQL to be sent to the datasource through the dataContext that was used in the original LINQ query. Since this dataContext has been disposed, it is no longer valid, and .ToList() throws an exception.
That is the "why it doesn't work". The fix is to move this line of code inside the scope of your dataContext.
How to use it properly is another question with a few arguably correct answers that depend on your application (Forms vs. ASP.net vs. MVC, etc.). The pattern that this implements is the Unit of Work pattern. There is almost no cost to creating a new context object, so the general rule is to create one, do your work, and then dispose of it. In web apps, some people will create a Context per request.
Instead of creating a thread, and using runOnUIThread
, this is a perfect job for ASyncTask:
In onPreExecute
, create & show the dialog.
in doInBackground
prepare the data, but don't touch the UI -- store each prepared datum in a field, then call publishProgress
.
In onProgressUpdate
read the datum field & make the appropriate change/addition to the UI.
In onPostExecute
dismiss the dialog.
If you have other reasons to want a thread, or are adding UI-touching logic to an existing thread, then do a similar technique to what I describe, to run on UI thread only for brief periods, using runOnUIThread
for each UI step. In this case, you will store each datum in a local final
variable (or in a field of your class), and then use it within a runOnUIThread
block.
In newer versions of Qt Creator (Currently using 4.4.1), you can follow these simple steps:
Tools > Options > Environment > Interface
Here you can change the theme to Flat Dark
.
It will change the whole Qt Creator theme, not just the editor window.
One-liner using String.replace with callback (no emoji support):
// 0 - index to replace, 'f' - replacement string
'dog'.replace(/./g, (c, i) => i == 0? 'f': c)
// "fog"
Explained:
//String.replace will call the callback on each pattern match
//in this case - each character
'dog'.replace(/./g, function (character, index) {
if (index == 0) //we want to replace the first character
return 'f'
return character //leaving other characters the same
})
Finally I found a solution - I'm posting it here for other people who might have the same problem (all 5 of you):
Under product add The following:
<Property Id="PREVIOUSVERSIONSINSTALLED" Secure="yes" />
<Upgrade Id="YOUR_GUID">
<UpgradeVersion
Minimum="1.0.0.0" Maximum="99.0.0.0"
Property="PREVIOUSVERSIONSINSTALLED"
IncludeMinimum="yes" IncludeMaximum="no" />
</Upgrade>
Under InstallExecuteSequence add:
<RemoveExistingProducts Before="InstallInitialize" />
From now on whenever I install the product it removed previous installed versions.
Note: replace upgrade Id with your own GUID
This is full degree image rotation code. I recommend you to check the below example app in the jsfiddle.
https://jsfiddle.net/casamia743/xqh48gno/
The process flow of this example app is
function init() {
...
image.onload = function() {
app.boundaryRad = Math.atan(image.width / image.height);
}
...
}
/**
* NOTE : When source rect is rotated at some rad or degrees,
* it's original width and height is no longer usable in the rendered page.
* So, calculate projected rect size, that each edge are sum of the
* width projection and height projection of the original rect.
*/
function calcProjectedRectSizeOfRotatedRect(size, rad) {
const { width, height } = size;
const rectProjectedWidth = Math.abs(width * Math.cos(rad)) + Math.abs(height * Math.sin(rad));
const rectProjectedHeight = Math.abs(width * Math.sin(rad)) + Math.abs(height * Math.cos(rad));
return { width: rectProjectedWidth, height: rectProjectedHeight };
}
/**
* @callback rotatedImageCallback
* @param {DOMString} dataURL - return value of canvas.toDataURL()
*/
/**
* @param {HTMLImageElement} image
* @param {object} angle
* @property {number} angle.degree
* @property {number} angle.rad
* @param {rotatedImageCallback} cb
*
*/
function getRotatedImage(image, angle, cb) {
const canvas = document.createElement('canvas');
const { degree, rad: _rad } = angle;
const rad = _rad || degree * Math.PI / 180 || 0;
debug('rad', rad);
const { width, height } = calcProjectedRectSizeOfRotatedRect(
{ width: image.width, height: image.height }, rad
);
debug('image size', image.width, image.height);
debug('projected size', width, height);
canvas.width = Math.ceil(width);
canvas.height = Math.ceil(height);
const ctx = canvas.getContext('2d');
ctx.save();
const sin_Height = image.height * Math.abs(Math.sin(rad))
const cos_Height = image.height * Math.abs(Math.cos(rad))
const cos_Width = image.width * Math.abs(Math.cos(rad))
const sin_Width = image.width * Math.abs(Math.sin(rad))
debug('sin_Height, cos_Width', sin_Height, cos_Width);
debug('cos_Height, sin_Width', cos_Height, sin_Width);
let xOrigin, yOrigin;
if (rad < app.boundaryRad) {
debug('case1');
xOrigin = Math.min(sin_Height, cos_Width);
yOrigin = 0;
} else if (rad < Math.PI / 2) {
debug('case2');
xOrigin = Math.max(sin_Height, cos_Width);
yOrigin = 0;
} else if (rad < Math.PI / 2 + app.boundaryRad) {
debug('case3');
xOrigin = width;
yOrigin = Math.min(cos_Height, sin_Width);
} else if (rad < Math.PI) {
debug('case4');
xOrigin = width;
yOrigin = Math.max(cos_Height, sin_Width);
} else if (rad < Math.PI + app.boundaryRad) {
debug('case5');
xOrigin = Math.max(sin_Height, cos_Width);
yOrigin = height;
} else if (rad < Math.PI / 2 * 3) {
debug('case6');
xOrigin = Math.min(sin_Height, cos_Width);
yOrigin = height;
} else if (rad < Math.PI / 2 * 3 + app.boundaryRad) {
debug('case7');
xOrigin = 0;
yOrigin = Math.max(cos_Height, sin_Width);
} else if (rad < Math.PI * 2) {
debug('case8');
xOrigin = 0;
yOrigin = Math.min(cos_Height, sin_Width);
}
debug('xOrigin, yOrigin', xOrigin, yOrigin)
ctx.translate(xOrigin, yOrigin)
ctx.rotate(rad);
ctx.drawImage(image, 0, 0);
if (DEBUG) drawMarker(ctx, 'red');
ctx.restore();
const dataURL = canvas.toDataURL('image/jpg');
cb(dataURL);
}
function render() {
getRotatedImage(app.image, {degree: app.degree}, renderResultImage)
}
var myProp = 'prop';
if(myObj.hasOwnProperty(myProp)){
alert("yes, i have that property");
}
Or
var myProp = 'prop';
if(myProp in myObj){
alert("yes, i have that property");
}
Or
if('prop' in myObj){
alert("yes, i have that property");
}
Note that hasOwnProperty
doesn't check for inherited properties, whereas in
does. For example 'constructor' in myObj
is true, but myObj.hasOwnProperty('constructor')
is not.
There is the function in guava libraries:
LongMath.log2()
So I suggest to use it.
Some background: I went looking for exactly this question because I had to do something to retrieve content, but all I had available was an old version of python with inadequate SSL support. If you're on an older MacBook, you know what I'm talking about. In any case, curl
runs fine from a shell (I suspect it has modern SSL support linked in) so sometimes you want to do this without using requests
or urllib2
.
You can use the subprocess
module to execute curl
and get at the retrieved content:
import subprocess
// 'response' contains a []byte with the retrieved content.
// use '-s' to keep curl quiet while it does its job, but
// it's useful to omit that while you're still writing code
// so you know if curl is working
response = subprocess.check_output(['curl', '-s', baseURL % page_num])
Python 3's subprocess
module also contains .run()
with a number of useful options. I'll leave it to someone who is actually running python 3 to provide that answer.
I prefer this way
Using ajaxStop
+ setInterval
,, this will refresh the page after any XHR[ajax] request in the same page
$(document).ajaxStop(function() {
setInterval(function() {
location.reload();
}, 3000);
});
The most easy way to do it is to go to values/strings (in your resource folder)
Declare a string there:
<string name="example_string">Line 1\Line2\Line n</string>
And in your specific xml file just call the string like
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/example_string" />
df.columns[df.isnull().any()].tolist()
it will return name of columns that contains null rows
According to the examples base64 encoding is directly supported, although I've not tested it myself. Take your base64 string (derived from a file or loaded with any other method, POST/GET, websockets etc), turn it to a binary with atob, and then parse this to getDocument on the PDFJS API likePDFJS.getDocument({data: base64PdfData});
Codetoffel answer does work just fine for me though.
Focus is for selecting UI components when you are using something besides touch (ie, a d-pad, a keyboard, etc.). Any view can receive focus, though some are not focusable by default. (You can make a view focusable with setFocusable(true)
and force it to be focused with requestFocus()
.)
However, it is important to note that when you are in touch mode, focus is disabled. So if you are using your fingers, changing the focus programmatically doesn't do anything. The exception to this is for views that receive input from an input editor. An EditText
is such an example. For this special situation setFocusableInTouchMode(true)
is used to let the soft keyboard know where to send input. An EditText
has this setting by default. The soft keyboard will automatically pop up.
If you don't want the soft keyboard popping up automatically then you can temporarily suppress it as @abeljus noted:
InputMethodManager inputManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
When a user clicks on the EditText
, it should still show the keyboard, though.
Plug in your network cable into a switch which has no other connection/cables. That should work imho.
If you know you want to convert from List<T1>
to List<T2>
then List<T>.ConvertAll
will be slightly more efficient than Select
/ToList
because it knows the exact size to start with:
target = orig.ConvertAll(x => new TargetType { SomeValue = x.SomeValue });
In the more general case when you only know about the source as an IEnumerable<T>
, using Select
/ToList
is the way to go. You could also argue that in a world with LINQ, it's more idiomatic to start with... but it's worth at least being aware of the ConvertAll
option.
Some people have pointed out that ‘ToUniversalTime’ is somewhat unsafe in that it can cause unintended incorrect time dispalys. Expanding on that I’m providing a more detailed example of a solution. The sample here creates an extension to the DateTime object that safely returns a UTC DateTime where you can use ToString as desired….
class Program
{
static void Main(string[] args)
{
DateTime dUtc = new DateTime(2016, 6, 1, 3, 17, 0, 0, DateTimeKind.Utc);
DateTime dUnspecified = new DateTime(2016, 6, 1, 3, 17, 0, 0, DateTimeKind.Unspecified);
//Sample of an unintended mangle:
//Prints "2016-06-01 10:17:00Z"
Console.WriteLine(dUnspecified.ToUniversalTime().ToString("u"));
//Prints "2016 - 06 - 01 03:17:00Z"
Console.WriteLine(dUtc.SafeUniversal().ToString("u"));
//Prints "2016 - 06 - 01 03:17:00Z"
Console.WriteLine(dUnspecified.SafeUniversal().ToString("u"));
}
}
public static class ConvertExtensions
{
public static DateTime SafeUniversal(this DateTime inTime)
{
return (DateTimeKind.Unspecified == inTime.Kind)
? new DateTime(inTime.Ticks, DateTimeKind.Utc)
: inTime.ToUniversalTime();
}
}
def sort(array=[12,4,5,6,7,3,1,15]):
"""Sort the array by using quicksort."""
less = []
equal = []
greater = []
if len(array) > 1:
pivot = array[0]
for x in array:
if x < pivot:
less.append(x)
elif x == pivot:
equal.append(x)
elif x > pivot:
greater.append(x)
# Don't forget to return something!
return sort(less)+equal+sort(greater) # Just use the + operator to join lists
# Note that you want equal ^^^^^ not pivot
else: # You need to handle the part at the end of the recursion - when you only have one element in your array, just return the array.
return array
I solved it by myself.
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.0.7.Final</version>
</dependency>
Depends on what you mean by "efficient". Performance-wise both versions are the same as its the same bytecode.
$ ./javap.exe -c java.lang.String | grep -A 10 "valueOf(boolean)"
public static java.lang.String valueOf(boolean);
Code:
0: iload_0
1: ifeq 9
4: ldc #14 // String true
6: goto 11
9: ldc #10 // String false
11: areturn
$ ./javap.exe -c java.lang.Boolean | grep -A 10 "toString(boolean)"
public static java.lang.String toString(boolean);
Code:
0: iload_0
1: ifeq 9
4: ldc #3 // String true
6: goto 11
9: ldc #2 // String false
11: areturn
In SSMS right click on a desired table > script as > create to > new query
-change the name of the table (ex. table2)
-change the PK key for the table (ex. PK_table2)
USE [NAMEDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[table_2](
[id] [int] NOT NULL,
[name] [varchar](50) NULL,
CONSTRAINT [PK_table_2] PRIMARY KEY CLUSTERED
(
[reference] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE =
OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON,
OPTIMIZE_FOR_SEQUENTIAL_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
GO
If the formulas are identical you can use Find and Replace with Match entire cell contents
checked and Look in: Formulas
. Select the range, go into Find and Replace, make your entries and `Replace All.
Or do you mean that there are several formulas with this same form, but different cell references? If so, then one way to go is a regular expression match and replace. Regular expressions are not built into Excel (or VBA), but can be accessed via Microsoft's VBScript Regular Expressions library.
The following function provides the necessary match and replace capability. It can be used in a subroutine that would identify cells with formulas in the specified range and use the formulas as inputs to the function. For formulas strings that match the pattern you are looking for, the function will produce the replacement formula, which could then be written back to the worksheet.
Function RegexFormulaReplace(formula As String)
Dim regex As New RegExp
regex.Pattern = "=\(\(([A-Z]+\d+)-([A-Z]+\d+)\)/([A-Z]+\d+)\)"
' Test if a match is found
If regex.Test(formula) = True Then
RegexFormulaReplace = regex.Replace(formula, "=(EXP((LN($1/$2)/14.32))-1")
Else
RegexFormulaReplace = CVErr(xlErrValue)
End If
Set regex = Nothing
End Function
In order for the function to work, you would need to add a reference to the Microsoft VBScript Regular Expressions 5.5 library. From the Developer
tab of the main ribbon, select VBA
and then References
from the main toolbar. Scroll down to find the reference to the library and check the box next to it.
I followed @user2314737's advice (his answer is on page 1) and enabled "Show debug information" under "Config" that after a restart of xampp showed me that my install path had a space " " in it which wasn't allowed.
My path was D:\Program files (x86)\xampp\ so I reinstalled it to D:\xampp\ and then it worked.
It's not generally correct that you can "remove an item from a database" with both methods. To be precise it is like so:
ObjectContext.DeleteObject(entity)
marks the entity as Deleted
in the context. (It's EntityState
is Deleted
after that.) If you call SaveChanges
afterwards EF sends a SQL DELETE
statement to the database. If no referential constraints in the database are violated the entity will be deleted, otherwise an exception is thrown.
EntityCollection.Remove(childEntity)
marks the relationship between parent and childEntity
as Deleted
. If the childEntity
itself is deleted from the database and what exactly happens when you call SaveChanges
depends on the kind of relationship between the two:
If the relationship is optional, i.e. the foreign key that refers from the child to the parent in the database allows NULL
values, this foreign will be set to null and if you call SaveChanges
this NULL
value for the childEntity
will be written to the database (i.e. the relationship between the two is removed). This happens with a SQL UPDATE
statement. No DELETE
statement occurs.
If the relationship is required (the FK doesn't allow NULL
values) and the relationship is not identifying (which means that the foreign key is not part of the child's (composite) primary key) you have to either add the child to another parent or you have to explicitly delete the child (with DeleteObject
then). If you don't do any of these a referential constraint is violated and EF will throw an exception when you call SaveChanges
- the infamous "The relationship could not be changed because one or more of the foreign-key properties is non-nullable" exception or similar.
If the relationship is identifying (it's necessarily required then because any part of the primary key cannot be NULL
) EF will mark the childEntity
as Deleted
as well. If you call SaveChanges
a SQL DELETE
statement will be sent to the database. If no other referential constraints in the database are violated the entity will be deleted, otherwise an exception is thrown.
I am actually a bit confused about the Remarks section on the MSDN page you have linked because it says: "If the relationship has a referential integrity constraint, calling the Remove method on a dependent object marks both the relationship and the dependent object for deletion.". This seems unprecise or even wrong to me because all three cases above have a "referential integrity constraint" but only in the last case the child is in fact deleted. (Unless they mean with "dependent object" an object that participates in an identifying relationship which would be an unusual terminology though.)
In Oracle query
select a.x
,(select b.y || ',' || b.z
from b
where b.v = a.v
and rownum = 1) as multple_columns
from a
can be transformed to:
select a.x, b1.y, b1.z
from a, b b1
where b1.rowid = (
select b.rowid
from b
where b.v = a.v
and rownum = 1
)
Is useful when we want to prevent duplication for table A. Similarly, we can increase the number of tables:
.... where (b1.rowid,c1.rowid) = (select b.rowid,c.rowid ....
If your Manifest.xml
has the default android:theme="@style/AppTheme"
Go to res/values/styles.xml and change
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
to
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
And the ActionBar
is disappeared!
unsigned int
randr(unsigned int min, unsigned int max)
{
double scaled = (double)rand()/RAND_MAX;
return (max - min +1)*scaled + min;
}
See here for other options.
$array[] = 'Hi';
pushes on top of the array.
$array['Hi'] = 'FooBar';
sets a specific index.
SQL Server databases are very Microsoft proprietary. Two options I can think of are:
Dump the database in CSV, XML or similar format that you'd then load into MySQL.
Setup ODBC connection to MySQL and then using DTS transport the data. As Charles Graham has suggested, you may need to build the tables before doing this. But that's as easy as a cut and paste from SQL Enterprise Manager windows to the corresponding MySQL window.
For triggers in general, you need to use a cursor to handle inserts or updates of multiple rows. For example:
DECLARE @Attribute;
DECLARE @ParameterValue;
DECLARE mycursor CURSOR FOR SELECT Attribute, ParameterValue FROM inserted;
OPEN mycursor;
FETCH NEXT FROM mycursor into @Attribute, @ParameterValue;
WHILE @@FETCH_STATUS = 0
BEGIN
If @Attribute LIKE 'NoHist_%'
Begin
Return
End
etc.
FETCH NEXT FROM mycursor into @Attribute, @ParameterValue;
END
Triggers, at least in SQL Server, are a big pain and I avoid using them at all.
I ran into the same issue today when trying to use a pod written in Objective-C in my Swift project, none of the above solutions seemed to work.
In the podfile I had use_frameworks!
written. Commenting this line and then running pod install
again solved this issue for me and the error went away.
This serves the purpose well enough:
list1 = [10, 'sumit', 43.21, 'kumar', '43', 'test', 3]
for x in list1:
print('index:', list1.index(x), 'value:', x)
I would suggest static class with static readonly. Please find the code snippet below:
public static class CachedKeysManager
{
public static readonly string DistributorList = "distributorList";
}
I created a small library that does this (along with some other handy conversions). It's called reimg, and it's really simple to use.
ReImg.fromCanvas(yourCanvasElement).toPng()
Reloading existing classes with existing data is likely to break things.
You can load new code into new class loaders relatively easily:
ClassLoader loader = URLClassLoader.newInstance(
new URL[] { yourURL },
getClass().getClassLoader()
);
Class<?> clazz = Class.forName("mypackage.MyClass", true, loader);
Class<? extends Runnable> runClass = clazz.asSubclass(Runnable.class);
// Avoid Class.newInstance, for it is evil.
Constructor<? extends Runnable> ctor = runClass.getConstructor();
Runnable doRun = ctor.newInstance();
doRun.run();
Class loaders no longer used can be garbage collected (unless there is a memory leak, as is often the case with using ThreadLocal, JDBC drivers, java.beans
, etc).
If you want to keep the object data, then I suggest a persistence mechanism such as Serialisation, or whatever you are used to.
Of course debugging systems can do fancier things, but are more hacky and less reliable.
It is possible to add new classes into a class loader. For instance, using URLClassLoader.addURL
. However, if a class fails to load (because, say, you haven't added it), then it will never load in that class loader instance.
When you use the keyword new
for example JFrame j = new JFrame();
you are creating an instance of the class JFrame
.
The
new
operator instantiates a class by allocating memory for a new object and returning a reference to that memory.
Note: The phrase "instantiating a class" means the same thing as "creating an object." When you create an object, you are creating an "instance" of a class, therefore "instantiating" a class.
Take a look here
Creating Objects
The types of the Java programming language are divided into two categories:
primitive types
andreference
types.
Thereference
types areclass
types,interface
types, andarray
types.
There is also a specialnull
type.
An object is a dynamically created instance of aclass
type or a dynamically createdarray
.
The values of areference
type are references to objects.
Refer Types, Values, and Variables for more information
Use:
File.open("out.txt", [your-option-string]) {|f| f.write("write your stuff here") }
where your options are:
r
- Read only. The file must exist. w
- Create an empty file for writing. a
- Append to a file.The file is created if it does not exist. r+
- Open a file for update both reading and writing. The file must exist. w+
- Create an empty file for both reading and writing. a+
- Open a file for reading and appending. The file is created if it does not exist. In your case, 'w'
is preferable.
OR you could have:
out_file = File.new("out.txt", "w")
#...
out_file.puts("write your stuff here")
#...
out_file.close
Here's something I've just knocked up. It inspects the environment of the last-launched "gnome-session" process (DISPLAY is set correctly when VNC launches a session/window manager). Replace "gnome-session" with the name of whatever process your VNC server launches on startup.
PID=`pgrep -n -u $USER gnome-session`
if [ -n "$PID" ]; then
export DISPLAY=`awk 'BEGIN{FS="="; RS="\0"} $1=="DISPLAY" {print $2; exit}' /proc/$PID/environ`
echo "DISPLAY set to $DISPLAY"
else
echo "Could not set DISPLAY"
fi
unset PID
You should just be able to drop that in your .bashrc file.
I used the following for creating a custom progress bar.
File res/drawable/progress_bar_states.xml
declares the colors of the different states:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@android:id/background">
<shape>
<gradient
android:startColor="#000001"
android:centerColor="#0b131e"
android:centerY="0.75"
android:endColor="#0d1522"
android:angle="270"
/>
</shape>
</item>
<item android:id="@android:id/secondaryProgress">
<clip>
<shape>
<gradient
android:startColor="#234"
android:centerColor="#234"
android:centerY="0.75"
android:endColor="#a24"
android:angle="270"
/>
</shape>
</clip>
</item>
<item android:id="@android:id/progress">
<clip>
<shape>
<gradient
android:startColor="#144281"
android:centerColor="#0b1f3c"
android:centerY="0.75"
android:endColor="#06101d"
android:angle="270"
/>
</shape>
</clip>
</item>
</layer-list>
And the code inside your layout xml:
<ProgressBar android:id="@+id/progressBar"
android:progressDrawable="@drawable/progress_bar_states"
android:layout_width="fill_parent" android:layout_height="8dip"
style="?android:attr/progressBarStyleHorizontal"
android:indeterminateOnly="false"
android:max="100">
</ProgressBar>
Enjoy!
You can actually extend Consumer
(and Function
etc.) with a new interface that handles exceptions -- using Java 8's default methods!
Consider this interface (extends Consumer
):
@FunctionalInterface
public interface ThrowingConsumer<T> extends Consumer<T> {
@Override
default void accept(final T elem) {
try {
acceptThrows(elem);
} catch (final Exception e) {
// Implement your own exception handling logic here..
// For example:
System.out.println("handling an exception...");
// Or ...
throw new RuntimeException(e);
}
}
void acceptThrows(T elem) throws Exception;
}
Then, for example, if you have a list:
final List<String> list = Arrays.asList("A", "B", "C");
If you want to consume it (eg. with forEach
) with some code that throws exceptions, you would traditionally have set up a try/catch block:
final Consumer<String> consumer = aps -> {
try {
// maybe some other code here...
throw new Exception("asdas");
} catch (final Exception ex) {
System.out.println("handling an exception...");
}
};
list.forEach(consumer);
But with this new interface, you can instantiate it with a lambda expression and the compiler will not complain:
final ThrowingConsumer<String> throwingConsumer = aps -> {
// maybe some other code here...
throw new Exception("asdas");
};
list.forEach(throwingConsumer);
Or even just cast it to be more succinct!:
list.forEach((ThrowingConsumer<String>) aps -> {
// maybe some other code here...
throw new Exception("asda");
});
Update: Looks like there's a very nice utility library part of Durian called Errors which can be used to solve this problem with a lot more flexibility. For example, in my implementation above I've explicitly defined the error handling policy (System.out...
or throw RuntimeException
), whereas Durian's Errors allow you to apply a policy on the fly via a large suite of utility methods. Thanks for sharing it, @NedTwigg!.
Sample usage:
list.forEach(Errors.rethrow().wrap(c -> somethingThatThrows(c)));
Find all IntelliJ (v15) symbols over here: https://www.jetbrains.com/idea/help/symbols.html
This site states that this icon stands for "Java class located out of the source root. Refer to the section Configuring Content Roots for details."
$six_digit_random_number = mt_rand(100000, 999999);
As all numbers between 100,000 and 999,999 are six digits, of course.
The issue appears with parsing the JSON from request body, tipical for an invalid JSON. If you're using curl on windows, try escaping the json like -d "{"name":"value"}"
or even -d "{"""name""":"value"""}"
On the other hand you can ommit the content-type header in which case whetewer is sent will be converted to your String argument
Javascript can be executed against the current page just by putting it in the URL address, e.g.
javascript:;alert(window.document.body.innerHTML);
javascript:;alert(window.document.body.childNodes[0].innerHTML);
Everything was too difficult or badly documented so I solved this with a simple script swagger-yaml-to-html.py, which works like this
python swagger-yaml-to-html.py < /path/to/api.yaml > doc.html
This is for YAML but modifying it to work with JSON is also trivial.
What about something like this (might have rounding errors and negative-value issues that need debugging, left as an exercise for the reader):
printf("%.0d%.4g\n", (int)f/10, f-((int)f-(int)f%10));
It's slightly programmatic but at least it doesn't make you do any string manipulation.
You could just nest the Text components with the required style. The style will be applied along with already defined style in the first Text component.
Example:
<Text style={styles.paragraph}>
Trouble singing in. <Text style={{fontWeight: "bold"}}> Resolve</Text>
</Text>
Windows Runtime equivalent of a function object in standard C++. One can use the whole function as a parameter (actually that is a function pointer). It is mostly used in conjunction with events. The delegate represents a contract that event handlers much fulfill. It facilitate how a function pointer can work for.
why not simply eg
var newList = list1.Union(list2)/*.Distinct()*//*.ToList()*/;
oh ... according to the documentation you can leave out the .Distinct()
This method excludes duplicates from the return set
jQuery("[name='test']")
Although you should avoid it and if possible select by ID (e.g. #myId
) as this has better performance because it invokes the native getElementById
.
You can avoid the password prompt on rsync
command by setting the environment variable RSYNC_PASSWORD
to the password you want to use or using the --password-file
option.
TF2 runs Eager Execution by default, thus removing the need for Sessions. If you want to run static graphs, the more proper way is to use tf.function()
in TF2. While Session can still be accessed via tf.compat.v1.Session()
in TF2, I would discourage using it. It may be helpful to demonstrate this difference by comparing the difference in hello worlds:
TF1.x hello world:
import tensorflow as tf
msg = tf.constant('Hello, TensorFlow!')
sess = tf.Session()
print(sess.run(msg))
TF2.x hello world:
import tensorflow as tf
msg = tf.constant('Hello, TensorFlow!')
tf.print(msg)
For more info, see Effective TensorFlow 2
As I have noticed this error occurs under two circumstances,
so use, either np.array(y_test) for y_true in scores or y_test.reset_index(drop=True)
Hope this helps.
When you use mysql_fetch_object
, you get an object (of class stdClass) with all fields for the row inside of it.
Use mysql_fetch_field
instead of mysql_fetch_object
, that will give you the first field of the result set (id
in your case). The docs are here
I know that JPA entities must have primary key but I can't change database structure due to reasons beyond my control.
More precisely, a JPA entity must have some Id
defined. But a JPA Id
does not necessarily have to be mapped on the table primary key (and JPA can somehow deal with a table without a primary key or unique constraint).
Is it possible to create JPA (Hibernate) entities that will be work with database structure like this?
If you have a column or a set of columns in the table that makes a unique value, you can use this unique set of columns as your Id
in JPA.
If your table has no unique columns at all, you can use all of the columns as the Id
.
And if your table has some id but your entity doesn't, make it an Embeddable
.
Maybe because its 2013-01-29 so +1 month would be 2013-02-29 which doesn't exist so it would be 2013-03-01
You could try
date('m/d/y h:i a',(strtotime('next month',strtotime(date('m/01/y')))));
from the comments on http://php.net/manual/en/function.strtotime.php
You could use
Calendar cal = Calendar.getInstance();
cal.setTime(beginupd);
long millis = cal.getTimeInMillis();
I have tried to make note about these and have collected and written examples from a java perspective.
Putting it here for any java developer who is looking into the same subject.
If you wanna update a table with that DateTime, you can use your SQL string like this example:
int fieldId;
DateTime myDateTime = DateTime.Now
string sql = string.Format(@"UPDATE TableName SET DateFieldName='{0}' WHERE FieldID={1}", myDateTime.ToString("yyyy-MM-dd HH:mm:ss"), fieldId.ToString());
I just created some directories, shared them and mapped using:
net use y: "\\mycomputername\folder with spaces"
So this solution gets "works on my machine" certificate. What error code do you get?
Use the SSMS, easiest way You can configure options for it as well (eg collation, syntax, drop...create)
Otherwise, SSMS Tools Pack, or DbFriend on CodePlex can help you generate scripts
JSON string that needs to be deserialized will have to contain the type information about parameter T
.
You will have to put Jackson annotations on every class that can be passed as parameter T
to class Data
so that the type information about parameter type T
can be read from / written to JSON string by Jackson.
Let us assume that T
can be any class that extends abstract class Result
.
class Data <T extends Result> {
int found;
Class<T> hits
}
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.WRAPPER_OBJECT)
@JsonSubTypes({
@JsonSubTypes.Type(value = ImageResult.class, name = "ImageResult"),
@JsonSubTypes.Type(value = NewsResult.class, name = "NewsResult")})
public abstract class Result {
}
public class ImageResult extends Result {
}
public class NewsResult extends Result {
}
Once each of the class (or their common supertype) that can be passed as parameter T
is annotated, Jackson will include information about parameter T
in the JSON. Such JSON can then be deserialized without knowing the parameter T
at compile time.
This Jackson documentation link talks about Polymorphic Deserialization but is useful to refer to for this question as well.
Not clear where My_ConnectionString
is coming from in your example, but try this
System.Configuration.ConfigurationManager.ConnectionStrings("My_ConnectionString").ConnectionString
like this
Dim DBConnection As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("My_ConnectionString").ConnectionString)
Similar to Julien's answer above, I had success with the following:
fig, ax = plt.subplots(figsize=(10,4))
for key, grp in df.groupby(['ticker']):
ax.plot(grp['Date'], grp['adj_close'], label=key)
ax.legend()
plt.show()
This solution might be more relevant if you want more control in matlab.
Solution inspired by: https://stackoverflow.com/a/52526454/10521959
Pass the decode pattern to ParseExact
Dim d as string = "201210120956"
Dim dt = DateTime.ParseExact(d, "yyyyMMddhhmm", Nothing)
ParseExact is available only from Net FrameWork 2.0.
If you are still on 1.1 you could use Parse, but you need to provide the IFormatProvider adequate to your string
Tested in Xcode 7 beta 4 , Swift 2.0 and iOS9 SDK . The following code will assign xib to the uiview. You can able to use this custom xib view in storyboard and access the IBOutlet object also.
import UIKit
@IBDesignable class SimpleCustomView:UIView
{
var view:UIView!;
@IBOutlet weak var lblTitle: UILabel!
@IBInspectable var lblTitleText : String?
{
get{
return lblTitle.text;
}
set(lblTitleText)
{
lblTitle.text = lblTitleText!;
}
}
override init(frame: CGRect) {
super.init(frame: frame)
loadViewFromNib ()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
loadViewFromNib ()
}
func loadViewFromNib() {
let bundle = NSBundle(forClass: self.dynamicType)
let nib = UINib(nibName: "SimpleCustomView", bundle: bundle)
let view = nib.instantiateWithOwner(self, options: nil)[0] as! UIView
view.frame = bounds
view.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
self.addSubview(view);
}
}
Access customview programatically
self.customView = SimpleCustomView(frame: CGRectMake(100, 100, 200, 200))
self.view.addSubview(self.customView!);
Source code - https://github.com/karthikprabhuA/CustomXIBSwift
SELECT
ISNULL(currate.currentrate, 1)
FROM ...
is less verbose than the winning answer and does the same thing
If you want to generate random numbers in range including '0' , use the following while 'max' is the maximum number in the range.
Random rand = new Random()
random_num = rand.nextInt(max+1)
The ZT Process Executor library is an alternative to Apache Commons Exec. It has functionality to run commands, capturing their output, setting timeouts, etc.
I have not used it yet, but it looks reasonably well-documented.
An example from the documentation: Executing a command, pumping the stderr to a logger, returning the output as UTF8 string.
String output = new ProcessExecutor().command("java", "-version")
.redirectError(Slf4jStream.of(getClass()).asInfo())
.readOutput(true).execute()
.outputUTF8();
Its documentation lists the following advantages over Commons Exec:
First you create method in your fragment
like
public void name()
{
}
in your activity
you add this
add onCreate()
method
myfragment fragment=new myfragment()
finally call the method where you want to call add this
fragment.method_name();
try this code
This is how you can dynamically create a class named Child
in your code, assuming Parent
already exists... even if you don't have an explicit Parent
class, you could use object
...
The code below defines __init__()
and then associates it with the class.
>>> child_name = "Child"
>>> child_parents = (Parent,)
>>> child body = """
def __init__(self, arg1):
# Initialization for the Child class
self.foo = do_something(arg1)
"""
>>> child_dict = {}
>>> exec(child_body, globals(), child_dict)
>>> childobj = type(child_name, child_parents, child_dict)
>>> childobj.__name__
'Child'
>>> childobj.__bases__
(<type 'object'>,)
>>> # Instantiating the new Child object...
>>> childinst = childobj()
>>> childinst
<__main__.Child object at 0x1c91710>
>>>
This answer is only applicable for websites which use Bootstrap. The responsive embed feature of the Bootstrap takes care of the scrollbars.
<!-- 16:9 aspect ratio -->
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="http://www.youtube.com/embed/WsFWhL4Y84Y"></iframe>
</div>
jsfiddle: http://jsfiddle.net/00qggsjj/2/
Consider using the decorator pattern http://en.wikipedia.org/wiki/Decorator_pattern
You can change the decorator at runtime with one that has different properties when an event occurs.
Microsoft provides us built-in functionality which we use in our application for security purposes, so no one can hack our site or invade some critical information.
From Purpose Of ValidateAntiForgeryToken In MVC Application by Harpreet Singh:
Use of ValidateAntiForgeryToken
Let’s try with a simple example to understand this concept. I do not want to make it too complicated, that’s why I am going to use a template of an MVC application, already available in Visual Studio. We will do this step by step. Let’s start.
Step 1 - Create two MVC applications with default internet template and give those names as CrossSite_RequestForgery and Attack_Application respectively.
Now, open CrossSite_RequestForgery application's Web Config and change the connection string with the one given below and then save.
`
<connectionStrings> <add name="DefaultConnection" connectionString="Data Source=local\SQLEXPRESS;Initial Catalog=CSRF; Integrated Security=true;" providerName="System.Data.SqlClient" /> </connectionStrings>
Now, click on Tools >> NuGet Package Manager, then Package Manager Console
Now, run the below mentioned three commands in Package Manager Console to create the database.
Enable-Migrations add-migration first update-database
Important Notes - I have created database with code first approach because I want to make this example in the way developers work. You can create database manually also. It's your choice.
- Now, open Account Controller. Here, you will see a register method whose type is post. Above this method, there should be an attribute available as [ValidateAntiForgeryToken]. Comment this attribute. Now, right click on register and click go to View. There again, you will find an html helper as @Html.AntiForgeryToken() . Comment this one also. Run the application and click on register button. The URL will be open as:
http://localhost:52269/Account/Register
Notes- I know now the question being raised in all readers’ minds is why these two helpers need to be commented, as everyone knows these are used to validate request. Then, I just want to let you all know that this is just because I want to show the difference after and before applying these helpers.
Now, open the second application which is Attack_Application. Then, open Register method of Account Controller. Just change the POST method with the simple one, shown below.
Registration Form
- @Html.LabelFor(m => m.UserName) @Html.TextBoxFor(m => m.UserName)
- @Html.LabelFor(m => m.Password) @Html.PasswordFor(m => m.Password)
- @Html.LabelFor(m => m.ConfirmPassword) @Html.PasswordFor(m => m.ConfirmPassword)
7.Now, suppose you are a hacker and you know the URL from where you can register user in CrossSite_RequestForgery application. Now, you created a Forgery site as Attacker_Application and just put the same URL in post method.
8.Run this application now and fill the register fields and click on register. You will see you are registered in CrossSite_RequestForgery application. If you check the database of CrossSite_RequestForgery application then you will see and entry you have entered.
- Important - Now, open CrossSite_RequestForgery application and comment out the token in Account Controller and register the View. Try to register again with the same process. Then, an error will occur as below.
Server Error in '/' Application. ________________________________________ The required anti-forgery cookie "__RequestVerificationToken" is not present.
This is what the concept says. What we add in View i.e. @Html.AntiForgeryToken() generates __RequestVerificationToken on load time and [ValidateAntiForgeryToken] available on Controller method. Match this token on post time. If token is the same, then it means this is a valid request.
Note the guidelines for performing work on a UI thread, collected on my blog:
There are two techniques you should use:
1) Use ConfigureAwait(false)
when you can.
E.g., await MyAsync().ConfigureAwait(false);
instead of await MyAsync();
.
ConfigureAwait(false)
tells the await
that you do not need to resume on the current context (in this case, "on the current context" means "on the UI thread"). However, for the rest of that async
method (after the ConfigureAwait
), you cannot do anything that assumes you're in the current context (e.g., update UI elements).
For more information, see my MSDN article Best Practices in Asynchronous Programming.
2) Use Task.Run
to call CPU-bound methods.
You should use Task.Run
, but not within any code you want to be reusable (i.e., library code). So you use Task.Run
to call the method, not as part of the implementation of the method.
So purely CPU-bound work would look like this:
// Documentation: This method is CPU-bound.
void DoWork();
Which you would call using Task.Run
:
await Task.Run(() => DoWork());
Methods that are a mixture of CPU-bound and I/O-bound should have an Async
signature with documentation pointing out their CPU-bound nature:
// Documentation: This method is CPU-bound.
Task DoWorkAsync();
Which you would also call using Task.Run
(since it is partially CPU-bound):
await Task.Run(() => DoWorkAsync());
I spent the better part of a day fiddling with this problem. Turned out the RowBackground Property on the DataGrid - which I had set - was overriding all attempts to change it in . As soon as I deleted it, everything worked. (Same goes for Foreground set in DataGridTextColumn, by the way).
(1)This is the native javascript solution for this issue. It works on most of modern browsers.
function export2csv() {_x000D_
let data = "";_x000D_
const tableData = [];_x000D_
const rows = document.querySelectorAll("table tr");_x000D_
for (const row of rows) {_x000D_
const rowData = [];_x000D_
for (const [index, column] of row.querySelectorAll("th, td").entries()) {_x000D_
// To retain the commas in the "Description" column, we can enclose those fields in quotation marks._x000D_
if ((index + 1) % 3 === 0) {_x000D_
rowData.push('"' + column.innerText + '"');_x000D_
} else {_x000D_
rowData.push(column.innerText);_x000D_
}_x000D_
}_x000D_
tableData.push(rowData.join(","));_x000D_
}_x000D_
data += tableData.join("\n");_x000D_
const a = document.createElement("a");_x000D_
a.href = URL.createObjectURL(new Blob([data], { type: "text/csv" }));_x000D_
a.setAttribute("download", "data.csv");_x000D_
document.body.appendChild(a);_x000D_
a.click();_x000D_
document.body.removeChild(a);_x000D_
}
_x000D_
table {_x000D_
border-collapse: collapse;_x000D_
}_x000D_
_x000D_
td, th {_x000D_
border: 1px solid #aaa;_x000D_
padding: 0.5rem;_x000D_
text-align: left;_x000D_
}_x000D_
_x000D_
td {_x000D_
font-size: 0.875rem;_x000D_
}_x000D_
_x000D_
.btn-group {_x000D_
padding: 1rem 0;_x000D_
}_x000D_
_x000D_
button {_x000D_
background-color: #fff;_x000D_
border: 1px solid #000;_x000D_
margin-top: 0.5rem;_x000D_
border-radius: 3px;_x000D_
padding: 0.5rem 1rem;_x000D_
font-size: 1rem;_x000D_
}_x000D_
_x000D_
button:hover {_x000D_
cursor: pointer;_x000D_
background-color: #000;_x000D_
color: #fff;_x000D_
}
_x000D_
<table>_x000D_
<thead>_x000D_
<tr>_x000D_
<th>Name</th>_x000D_
<th>Author</th>_x000D_
<th>Description</th>_x000D_
</tr>_x000D_
</thead>_x000D_
<tbody>_x000D_
<tr>_x000D_
<td>jQuery</td>_x000D_
<td>John Resig</td>_x000D_
<td>The Write Less, Do More, JavaScript Library.</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>React</td>_x000D_
<td>Jordan Walke</td>_x000D_
<td>React makes it painless to create interactive UIs.</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Vue.js</td>_x000D_
<td>Yuxi You</td>_x000D_
<td>The Progressive JavaScript Framework.</td>_x000D_
</tr>_x000D_
</tbody>_x000D_
</table>_x000D_
_x000D_
<div class="btn-group">_x000D_
<button onclick="export2csv()">csv</button>_x000D_
</div>
_x000D_
(2) If you want a pure javascript library, FileSaver.js could help you save the code snippets for triggering file download. Besides, FileSaver.js will not be responsible for constructing content for exporting. You have to construct the content by yourself in the format you want.
You need to change your code as below:
<html>
<body>
<span id="span_Id">Click the button to display the content.</span>
<button onclick="displayDate()">Click Me</button>
<script>
function displayDate() {
var span_Text = document.getElementById("span_Id").innerText;
alert (span_Text);
}
</script>
</body>
</html>
I've renamed the project' subfolder from: "android/app/src/main/java/MY/APP/OLD_ID/" to: "android/app/src/main/java/MY/APP/NEW_ID/"
Then manually switched the old and new package ids:
In: android/app/src/main/java/MY/APP/NEW_ID/MainActivity.java:
package MY.APP.NEW_ID;
In android/app/src/main/java/MY/APP/NEW_ID/MainApplication.java:
package MY.APP.NEW_ID;
In android/app/src/main/AndroidManifest.xml:
package="MY.APP.NEW_ID"
And in android/app/build.gradle:
applicationId "MY.APP.NEW_ID"
In android/app/BUCK:
android_build_config(
package="MY.APP.NEW_ID"
)
android_resource(
package="MY.APP.NEW_ID"
)
Gradle' cleaning in the end (in /android folder):
./gradlew clean
First, reset any changes
This will undo any changes you've made to tracked files and restore deleted files:
git reset HEAD --hard
Second, remove new files
This will delete any new files that were added since the last commit:
git clean -fd
Files that are not tracked due to .gitignore
are preserved; they will not be removed
Warning: using -x
instead of -fd
would delete ignored files. You probably don't want to do this.
It is:
<%=Html.ActionLink("Home", "Index", MyRouteValObj, new with {.class = "tab" })%>
In VB.net you set an anonymous type using
new with {.class = "tab" }
and, as other point out, your third parameter should be an object (could be an anonymous type, also).
pg_dump -h localhost -U postgres -F c -b -v -f mydb.backup mydb
Hi try with this overflow-y: scroll. I hope it may helps you
If it is just simple data contained in the Excel file you can read the data via ADO.NET. See the connection strings listed here:
http://www.connectionstrings.com/?carrier=excel2007 or http://www.connectionstrings.com/?carrier=excel
-Ryan
Update: then you can just read the worksheet via something like select * from [Sheet1$]
$sth = mysqli_query($conn, "SELECT ...");
$rows = array();
while($r = mysqli_fetch_assoc($sth)) {
$rows[] = $r;
}
print json_encode($rows);
The function json_encode
needs PHP >= 5.2 and the php-json package - as mentioned here
NOTE: mysql
is deprecated as of PHP 5.5.0, use mysqli
extension instead http://php.net/manual/en/migration55.deprecated.php.
This sample in VB.NET reads all extended properties:
Sub Main()
Dim arrHeaders(35)
Dim shell As New Shell32.Shell
Dim objFolder As Shell32.Folder
objFolder = shell.NameSpace("C:\tmp")
For i = 0 To 34
arrHeaders(i) = objFolder.GetDetailsOf(objFolder.Items, i)
Next
For Each strFileName In objfolder.Items
For i = 0 To 34
Console.WriteLine(i & vbTab & arrHeaders(i) & ": " & objfolder.GetDetailsOf(strFileName, i))
Next
Next
End Sub
You have to add a reference to Microsoft Shell Controls and Automation from the COM tab of the References dialog.
Use draw9patch... included within Android Studio's SDK tools. You can define the stretchable areas of your image. Important parts are constrained and the image doesn't look all warped. A good demo on dra9patch is HERE
Use draw9patch to change your existing splash.png into new_splash.9.png, drag new_splash.9.png into the drawable-hdpi project folder ensure the AndroidManifest and styles.xml are proper as below:
AndroidManifest.xml:
<application
...
android:theme="@style/splashScreenStyle"
>
styles.xml:
<style name="splashScreenStyle" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:windowBackground">@drawable/new_splash</item>
</style>
With a Maven build, you can add the @XmlRootElement
annotation
with the "jaxb2-basics-annotate
" plug-in.
See more information : see
Configure Maven to generate classes from XML Schema using JAXB
If you want all the bars to get the same color (fill
), you can easily add it inside geom_bar
.
ggplot(data=df, aes(x=c1+c2/2, y=c3)) +
geom_bar(stat="identity", width=c2, fill = "#FF6666")
Add fill = the_name_of_your_var
inside aes
to change the colors depending of the variable :
c4 = c("A", "B", "C")
df = cbind(df, c4)
ggplot(data=df, aes(x=c1+c2/2, y=c3, fill = c4)) +
geom_bar(stat="identity", width=c2)
Use scale_fill_manual()
if you want to manually the change of colors.
ggplot(data=df, aes(x=c1+c2/2, y=c3, fill = c4)) +
geom_bar(stat="identity", width=c2) +
scale_fill_manual("legend", values = c("A" = "black", "B" = "orange", "C" = "blue"))
Surprised that no one has mentioned conda
so far. I have found this is a lot more straightforward than the other methods mentioned here. Let's say I have python 3.9 and python 2.7 and a project I am working on was python 3.5.4, I could simply create the isolated virtual env for 3.5.4 with the conda command without downloading anything else.
To see a list of available python versions first, use the command
conda search "^python$"
To create the virtual environment for python version x.y.z, use the command
conda create -n yourenvname python=x.y.z
Activate venv with
conda activate yourenvname
Deactivate with
conda deactivate
To delete the virtual environment when done, use the command
conda remove -n yourenvname --all
In boto 3, the 'Key.set_contents_from_' methods were replaced by
For example:
import boto3
some_binary_data = b'Here we have some data'
more_binary_data = b'Here we have some more data'
# Method 1: Object.put()
s3 = boto3.resource('s3')
object = s3.Object('my_bucket_name', 'my/key/including/filename.txt')
object.put(Body=some_binary_data)
# Method 2: Client.put_object()
client = boto3.client('s3')
client.put_object(Body=more_binary_data, Bucket='my_bucket_name', Key='my/key/including/anotherfilename.txt')
Alternatively, the binary data can come from reading a file, as described in the official docs comparing boto 2 and boto 3:
Storing Data
Storing data from a file, stream, or string is easy:
# Boto 2.x from boto.s3.key import Key key = Key('hello.txt') key.set_contents_from_file('/tmp/hello.txt') # Boto 3 s3.Object('mybucket', 'hello.txt').put(Body=open('/tmp/hello.txt', 'rb'))
Xcode 8 Swift 3.0 use type(of:)
let className = "\(type(of: instance))"
It's the response code a SIP User Agent Server (UAS) will send to the client after the client sends a CANCEL request for the original unanswered INVITE request (yet to receive a final response).
Here is a nice CANCEL SIP Call Flow illustration.
I am surprised that the connection string works for you, because it is missing a semi-colon. Set is only used with objects, so you would not say Set strNaam.
Set cn = CreateObject("ADODB.Connection")
With cn
.Provider = "Microsoft.Jet.OLEDB.4.0"
.ConnectionString = "Data Source=D:\test.xls " & _
";Extended Properties=""Excel 8.0;HDR=Yes;"""
.Open
End With
strQuery = "SELECT * FROM [Sheet1$E36:E38]"
Set rs = cn.Execute(strQuery)
Do While Not rs.EOF
For i = 0 To rs.Fields.Count - 1
Debug.Print rs.Fields(i).Name, rs.Fields(i).Value
strNaam = rs.Fields(0).Value
Next
rs.MoveNext
Loop
rs.Close
There are other ways, depending on what you want to do, such as GetString (GetString Method Description).
1) Server.MapPath(".")
-- Returns the "Current Physical Directory" of the file (e.g. aspx
) being executed.
Ex. Suppose D:\WebApplications\Collage\Departments
2) Server.MapPath("..")
-- Returns the "Parent Directory"
Ex. D:\WebApplications\Collage
3) Server.MapPath("~")
-- Returns the "Physical Path to the Root of the Application"
Ex. D:\WebApplications\Collage
4) Server.MapPath("/")
-- Returns the physical path to the root of the Domain Name
Ex. C:\Inetpub\wwwroot
Basically, you're trying to use int
as if it was an Object
, which it isn't (well...it's complicated)
id.equals(list[pos].getItemNumber())
Should be...
id == list[pos].getItemNumber()
The spaces are significant. You created a variable named 'location '
with a value of
' "bob"'
. Note - enclosing single quotes were added to show location of space.
If you want quotes in your value, then your code should look like
set location="bob"
If you don't want quotes, then your code should look like
set location=bob
Or better yet
set "location=bob"
The last syntax prevents inadvertent trailing spaces from getting in the value, and also protects against special characters like &
|
etc.
In my case (i want to add 3 years to current date) the solution was:
$future_date = date('Y-m-d', strtotime("now + 3 years"));
To Gardenee, Treby and Daniel Lima: what will happen with 29th February? Sometimes February has only 28 days :)
@using (Html.BeginForm()) {
<p>Do you like pizza?
@Html.DropDownListFor(x => x.likesPizza, new[] {
new SelectListItem() {Text = "Yes", Value = bool.TrueString},
new SelectListItem() {Text = "No", Value = bool.FalseString}
}, "Choose an option")
</p>
<input type = "submit" value = "Submit my answer" />
}
I think this answer is similar to Berat's, in that you put all the code for your DropDownList directly in the view. But I think this is an efficient way of creating a y/n (boolean) drop down list, so I wanted to share it.
Some notes for beginners:
Hope this helps someone,
There are many great contributions here, but let me add mine non the less.
First thing i noticed is, you did not make any promises in the main file that you were going to create a function known as add(). This count have been done like this in the main file:
int add(int a, int b);
before your main function, that way your main function would recognize the add function and try to look for its executable code. So essentially your files should be
Main.c
int add(int a, int b);
int main(void) {
int result = add(5,6);
printf("%d\n", result);
}
and // add.c
int add(int a, int b) {
return a + b;
}
Alt+H, then type letters FC, then pick the color.
There is a bitshift
trick I use if I want to to convert from bytes
to any other unit. If you do a right shift by 10
you basically shift it by an order (multiple).
Example:
5GB are 5368709120 bytes
print (5368709120 >> 10) # 5242880 kilobytes (kB)
print (5368709120 >> 20 ) # 5120 megabytes (MB)
print (5368709120 >> 30 ) # 5 gigabytes (GB)
For me the problem was a wrong copy/paste of the public key into Gitlab. The copy generated an extra return. Make sure what you paste is a one-line key.
This is a circular dependency. It can be solved without any structural modifications to the code. The problem occurs because in vector
you demand that entity
be made available for use immediately, and vice versa. The reason for this problem is that you asking to access the contents of the module before it is ready -- by using from x import y
. This is essentially the same as
import x
y = x.y
del x
Python is able to detect circular dependencies and prevent the infinite loop of imports. Essentially all that happens is that an empty placeholder is created for the module (ie. it has no content). Once the circularly dependent modules are compiled it updates the imported module. This is works something like this.
a = module() # import a
# rest of module
a.update_contents(real_a)
For python to be able to work with circular dependencies you must use import x
style only.
import x
class cls:
def __init__(self):
self.y = x.y
Since you are no longer referring to the contents of the module at the top level, python can compile the module without actually having to access the contents of the circular dependency. By top level I mean lines that will be executed during compilation as opposed to the contents of functions (eg. y = x.y
). Static or class variables accessing the module contents will also cause problems.
If even sudo apt-get install python3-pymysql
does not work for you try this:
sudo python3 setup.py install
You can also use this approach in case you want to pass some http parameters and send a json request:
(note: I have added in some extra code just incase it helps any other future readers)
public void postJsonWithHttpParams() throws URISyntaxException, UnsupportedEncodingException, IOException {
//add the http parameters you wish to pass
List<NameValuePair> postParameters = new ArrayList<>();
postParameters.add(new BasicNameValuePair("param1", "param1_value"));
postParameters.add(new BasicNameValuePair("param2", "param2_value"));
//Build the server URI together with the parameters you wish to pass
URIBuilder uriBuilder = new URIBuilder("http://google.ug");
uriBuilder.addParameters(postParameters);
HttpPost postRequest = new HttpPost(uriBuilder.build());
postRequest.setHeader("Content-Type", "application/json");
//this is your JSON string you are sending as a request
String yourJsonString = "{\"str1\":\"a value\",\"str2\":\"another value\"} ";
//pass the json string request in the entity
HttpEntity entity = new ByteArrayEntity(yourJsonString.getBytes("UTF-8"));
postRequest.setEntity(entity);
//create a socketfactory in order to use an http connection manager
PlainConnectionSocketFactory plainSocketFactory = PlainConnectionSocketFactory.getSocketFactory();
Registry<ConnectionSocketFactory> connSocketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", plainSocketFactory)
.build();
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(connSocketFactoryRegistry);
connManager.setMaxTotal(20);
connManager.setDefaultMaxPerRoute(20);
RequestConfig defaultRequestConfig = RequestConfig.custom()
.setSocketTimeout(HttpClientPool.connTimeout)
.setConnectTimeout(HttpClientPool.connTimeout)
.setConnectionRequestTimeout(HttpClientPool.readTimeout)
.build();
// Build the http client.
CloseableHttpClient httpclient = HttpClients.custom()
.setConnectionManager(connManager)
.setDefaultRequestConfig(defaultRequestConfig)
.build();
CloseableHttpResponse response = httpclient.execute(postRequest);
//Read the response
String responseString = "";
int statusCode = response.getStatusLine().getStatusCode();
String message = response.getStatusLine().getReasonPhrase();
HttpEntity responseHttpEntity = response.getEntity();
InputStream content = responseHttpEntity.getContent();
BufferedReader buffer = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = buffer.readLine()) != null) {
responseString += line;
}
//release all resources held by the responseHttpEntity
EntityUtils.consume(responseHttpEntity);
//close the stream
response.close();
// Close the connection manager.
connManager.close();
}
The easiest way is start the simulator from the Xcode
, and then on the dock, Ctrl
+ Click
on the icon and select Keep in Dock
http://en.wikipedia.org/wiki/Post/Redirect/Get
The most common way to implement this pattern in ASP.Net is to use Response.Redirect(Request.RawUrl)
Consider the differences between Redirect and Transfer. Transfer really isn't telling the browser to forward to a clear form, it's simply returning a cleared form. That may or may not be what you want.
Response.Redirect() does not a waste round trip. If you post to a script that clears the form by Server.Transfer() and reload you will be asked to repost by most browsers since the last action was a HTTP POST. This may cause your users to unintentionally repeat some action, eg. place a second order which will have to be voided later.
I did it with:
python3 -m pip install --upgrade tensorflow
Put an -f
option in your rm
command.
rm -f .lambda .lambda_t .activity .activity_t_lambda
You can also use a function within stat_summary to calculate the mean and the hjust argument to place the text, you need a additional function but no additional data frame:
fun_mean <- function(x){
return(data.frame(y=mean(x),label=mean(x,na.rm=T)))}
ggplot(PlantGrowth,aes(x=group,y=weight)) +
geom_boxplot(aes(fill=group)) +
stat_summary(fun.y = mean, geom="point",colour="darkred", size=3) +
stat_summary(fun.data = fun_mean, geom="text", vjust=-0.7)
A deadlock happens when a thread is waiting for something that never occurs.
Typically, it happens when a thread is waiting on a mutex or semaphore that was never released by the previous owner.
It also frequently happens when you have a situation involving two threads and two locks like this:
Thread 1 Thread 2
Lock1->Lock(); Lock2->Lock();
WaitForLock2(); WaitForLock1(); <-- Oops!
You generally detect them because things that you expect to happen never do, or the application hangs entirely.
Try this link.... horizontal rule
That should do the trick.
The code below is xml.
<View
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="#FF00FF00" />
I find that no one mentions this difference:
__getattribute__
has a default implementation, but __getattr__
does not.
class A:
pass
a = A()
a.__getattr__ # error
a.__getattribute__ # return a method-wrapper
This has a clear meaning: since __getattribute__
has a default implementation, while __getattr__
not, clearly python encourages users to implement __getattr__
.
PEP 8 advises the first form for readability. You can find it here.
Function names should be lowercase, with words separated by underscores as necessary to improve readability.
Sorry for necroposting this, but I recently implemented a locally hosted site that had needed the ability to close the current browser tab and found some interesting workarounds that are not well documented anywhere I could find, so took it on myself to do so.
Note: These workarounds were done with a locally hosted site in mind, and (with the exception of Edge) require the browser to be specifically configured, so would not be ideal for publicly hosted sites.
Context: In the past, the jQuery script window.close()
was able to close the current tab without a problem on most browsers. However, modern browsers no longer support this script, potentially for security reasons.
Chrome does not allow the window.close() script to be to be run and nothing happens if you try to use it. By using the Chrome plugin TamperMonkey however we can use the window.close() method if you include the // @grant window.close
in the UserScript header of TamperMonkey.
For example, my script (which is triggered when a button with id = 'close_page' is clicked and if 'yes' is pressed on the browser popup) looks like:
// ==UserScript==
// @name Close Tab Script
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Closes current tab when triggered
// @author Mackey Johnstone
// @match http://localhost/index.php
// @grant window.close
// @require http://code.jquery.com/jquery-3.4.1.min.js
// ==/UserScript==
(function() {
'use strict';
$("#close_page").click(function() {
var confirm_result = confirm("Are you sure you want to quit?");
if (confirm_result == true) {
window.close();
}
});
})();
Note: This solution can only close the tab if it is NOT the last tab open however. So effectively, it cannot close the tab if it would cause window to closes by being the last tab open.
Firefox has an advanced setting that you can enable to allow scripts to close windows, effectively enabling the window.close()
method. To enable this setting go to about:config then search and find the dom.allow_scripts_to_close_windows preference and switch it from false to true.
This allows you to use the window.close()
method directly in your jQuery file as you would any other script.
For example, this script works perfectly with the preference set to true:
<script>
$("#close_page").click(function() {
var confirm_result = confirm("Are you sure you want to quit?");
if (confirm_result == true) {
window.close();
}
});
</script>
This works much better than the Chrome workaround as it allows the user to close the current tab even if it is the only tab open, and doesn't require a third party plugin. The one downside however is that it also enables this script to be run by different websites (not just the one you are intending it to use on) so could potentially be a security hazard, although I cant imagine closing the current tab being particularly dangerous.
Disappointingly Edge actually performed the best out of all 3 browsers I tried, and worked with the window.close()
method without requiring any configuration. When the window.close()
script is run, an additional popup alerts you that the page is trying to close the current tab and asks if you want to continue.
Edit: This was on the old version of Edge not based on chromium. I have not tested it, but imagine it will act similarly to Chrome on chromium based versions
Final Note: The solutions for both Chrome and Firefox are workarounds for something that the browsers intentionally disabled, potentially for security reasons. They also both require the user to configure their browsers up to be compatible before hand, so would likely not be viable for sites intended for public use, but are ideal for locally hosted solutions like mine.
Hope this helped! :)
You can do it as follow:
#include < iostream >
using namespace std;
int main () {
string texts[] = {"Apple", "Banana", "Orange"};
for( unsigned int a = 0; a < sizeof(texts) / 32; a++ ) { // 32 is the size of string data type
cout << "value of a: " << texts[a] << endl;
}
return 0;
}
You can use the %in%
operator:
vec <- c(1, 2, 3, 4, 5)
1 %in% vec # true
10 %in% vec # false
MSDN seems to have an article for this now:
https://msdn.microsoft.com/en-us/library/bb412196(v=vs.110).aspx
Intro:
By default, Windows Communication Foundation (WCF) makes endpoints available only to SOAP clients. In How to: Create a Basic WCF Web HTTP Service, an endpoint is made available to non-SOAP clients. There may be times when you want to make the same contract available both ways, as a Web endpoint and as a SOAP endpoint. This topic shows an example of how to do this.
Regards.
I wrote a useful scalar function to simulate the TRY_CAST function of SQL SERVER 2012 in SQL Server 2008.
You can see it in the next link below and we help each other to improve it. TRY_CAST Function for SQL Server 2008 https://gist.github.com/jotapardo/800881eba8c5072eb8d99ce6eb74c8bb
The two main differences are that you must pass 3 parameters and you must additionally perform an explicit CONVERT or CAST to the field. However, it is still very useful because it allows you to return a default value if CAST is not performed correctly.
dbo.TRY_CAST(Expression, Data_Type, ReturnValueIfErrorCast)
Example:
SELECT CASE WHEN dbo.TRY_CAST('6666666166666212', 'INT', DEFAULT) IS NULL
THEN 'Cast failed'
ELSE 'Cast succeeded'
END AS Result;
For now only supports the data types INT, DATE, NUMERIC, BIT and FLOAT
I hope you find it useful.
CODE:
DECLARE @strSQL NVARCHAR(1000)
IF NOT EXISTS (SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[dbo].[TRY_CAST]'))
BEGIN
SET @strSQL = 'CREATE FUNCTION [dbo].[TRY_CAST] () RETURNS INT AS BEGIN RETURN 0 END'
EXEC sys.sp_executesql @strSQL
END
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*
------------------------------------------------------------------------------------------------------------------------
Description:
Syntax
---------------
dbo.TRY_CAST(Expression, Data_Type, ReturnValueIfErrorCast)
+---------------------------+-----------------------+
| Expression | VARCHAR(8000) |
+---------------------------+-----------------------+
| Data_Type | VARCHAR(8000) |
+---------------------------+-----------------------+
| ReturnValueIfErrorCast | SQL_VARIANT = NULL |
+---------------------------+-----------------------+
Arguments
---------------
expression
The value to be cast. Any valid expression.
Data_Type
The data type into which to cast expression.
ReturnValueIfErrorCast
Value returned if cast fails or is not supported. Required. Set the DEFAULT value by default.
Return Type
----------------
Returns value cast to SQL_VARIANT type if the cast succeeds; otherwise, returns null if the parameter @pReturnValueIfErrorCast is set to DEFAULT,
or that the user indicates.
Remarks
----------------
dbo.TRY_CAST function simulates the TRY_CAST function reserved of SQL SERVER 2012 for using in SQL SERVER 2008.
dbo.TRY_CAST function takes the value passed to it and tries to convert it to the specified Data_Type.
If the cast succeeds, dbo.TRY_CAST returns the value as SQL_VARIANT type; if the cast doesn´t succees, null is returned if the parameter @pReturnValueIfErrorCast is set to DEFAULT.
If the Data_Type is unsupported will return @pReturnValueIfErrorCast.
dbo.TRY_CAST function requires user make an explicit CAST or CONVERT in ANY statements.
This version of dbo.TRY_CAST only supports CAST for INT, DATE, NUMERIC and BIT types.
Examples
====================================================================================================
--A. Test TRY_CAST function returns null
SELECT
CASE WHEN dbo.TRY_CAST('6666666166666212', 'INT', DEFAULT) IS NULL
THEN 'Cast failed'
ELSE 'Cast succeeded'
END AS Result;
GO
--B. Error Cast With User Value
SELECT
dbo.TRY_CAST('2147483648', 'INT', DEFAULT) AS [Error Cast With DEFAULT],
dbo.TRY_CAST('2147483648', 'INT', -1) AS [Error Cast With User Value],
dbo.TRY_CAST('2147483648', 'INT', NULL) AS [Error Cast With User NULL Value];
GO
--C. Additional CAST or CONVERT required in any assignment statement
DECLARE @IntegerVariable AS INT
SET @IntegerVariable = CAST(dbo.TRY_CAST(123, 'INT', DEFAULT) AS INT)
SELECT @IntegerVariable
GO
IF OBJECT_ID('tempdb..#temp') IS NOT NULL
DROP TABLE #temp
CREATE TABLE #temp (
Id INT IDENTITY
, FieldNumeric NUMERIC(3, 1)
)
INSERT INTO dbo.#temp (FieldNumeric)
SELECT CAST(dbo.TRY_CAST(12.3, 'NUMERIC(3,1)', 0) AS NUMERIC(3, 1));--Need explicit CAST on INSERT statements
SELECT *
FROM #temp
DROP TABLE #temp
GO
--D. Supports CAST for INT, DATE, NUMERIC and BIT types.
SELECT dbo.TRY_CAST(2147483648, 'INT', 0) AS [Cast failed]
, dbo.TRY_CAST(2147483647, 'INT', 0) AS [Cast succeeded]
, SQL_VARIANT_PROPERTY(dbo.TRY_CAST(212, 'INT', 0), 'BaseType') AS [BaseType];
SELECT dbo.TRY_CAST('AAAA0101', 'DATE', DEFAULT) AS [Cast failed]
, dbo.TRY_CAST('20160101', 'DATE', DEFAULT) AS [Cast succeeded]
, SQL_VARIANT_PROPERTY(dbo.TRY_CAST('2016-01-01', 'DATE', DEFAULT), 'BaseType') AS [BaseType];
SELECT dbo.TRY_CAST(1.23, 'NUMERIC(3,1)', DEFAULT) AS [Cast failed]
, dbo.TRY_CAST(12.3, 'NUMERIC(3,1)', DEFAULT) AS [Cast succeeded]
, SQL_VARIANT_PROPERTY(dbo.TRY_CAST(12.3, 'NUMERIC(3,1)', DEFAULT), 'BaseType') AS [BaseType];
SELECT dbo.TRY_CAST('A', 'BIT', DEFAULT) AS [Cast failed]
, dbo.TRY_CAST(1, 'BIT', DEFAULT) AS [Cast succeeded]
, SQL_VARIANT_PROPERTY(dbo.TRY_CAST('123', 'BIT', DEFAULT), 'BaseType') AS [BaseType];
GO
--E. B. TRY_CAST return NULL on unsupported data_types
SELECT dbo.TRY_CAST(4, 'xml', DEFAULT) AS [unsupported];
GO
====================================================================================================
------------------------------------------------------------------------------------------------------------------------
Responsible: Javier Pardo
Date: diciembre 29/2016
WB tests: Javier Pardo
------------------------------------------------------------------------------------------------------------------------
Update by: Javier Eduardo Pardo Moreno
Date: febrero 16/2017
Id update: JEPM20170216
Description: Fix ISNUMERIC function makes it unreliable. SELECT dbo.TRY_CAST('+', 'INT', 0) will yield Msg 8114,
Level 16, State 5, Line 16 Error converting data type varchar to float.
ISNUMERIC() function treats few more characters as numeric, like: – (minus), + (plus), $ (dollar), \ (back slash), (.)dot and (,)comma
Collaborator aperiooculus (http://stackoverflow.com/users/3083382/aperiooculus )
Fix dbo.TRY_CAST('2013/09/20', 'datetime', DEFAULT) for supporting DATETIME format
WB tests: Javier Pardo
------------------------------------------------------------------------------------------------------------------------
*/
ALTER FUNCTION dbo.TRY_CAST
(
@pExpression AS VARCHAR(8000),
@pData_Type AS VARCHAR(8000),
@pReturnValueIfErrorCast AS SQL_VARIANT = NULL
)
RETURNS SQL_VARIANT
AS
BEGIN
--------------------------------------------------------------------------------
-- INT
--------------------------------------------------------------------------------
IF @pData_Type = 'INT'
BEGIN
IF ISNUMERIC(@pExpression) = 1 AND @pExpression NOT IN ('-','+','$','.',',','\') --JEPM20170216
BEGIN
DECLARE @pExpressionINT AS FLOAT = CAST(@pExpression AS FLOAT)
IF @pExpressionINT BETWEEN - 2147483648.0 AND 2147483647.0
BEGIN
RETURN CAST(@pExpressionINT as INT)
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END --FIN IF @pExpressionINT BETWEEN - 2147483648.0 AND 2147483647.0
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END -- FIN IF ISNUMERIC(@pExpression) = 1
END -- FIN IF @pData_Type = 'INT'
--------------------------------------------------------------------------------
-- DATE
--------------------------------------------------------------------------------
IF @pData_Type IN ('DATE','DATETIME')
BEGIN
IF ISDATE(@pExpression) = 1
BEGIN
DECLARE @pExpressionDATE AS DATETIME = cast(@pExpression AS DATETIME)
IF @pData_Type = 'DATE'
BEGIN
RETURN cast(@pExpressionDATE as DATE)
END
IF @pData_Type = 'DATETIME'
BEGIN
RETURN cast(@pExpressionDATE as DATETIME)
END
END
ELSE
BEGIN
DECLARE @pExpressionDATEReplaced AS VARCHAR(50) = REPLACE(REPLACE(REPLACE(@pExpression,'\',''),'/',''),'-','')
IF ISDATE(@pExpressionDATEReplaced) = 1
BEGIN
IF @pData_Type = 'DATE'
BEGIN
RETURN cast(@pExpressionDATEReplaced as DATE)
END
IF @pData_Type = 'DATETIME'
BEGIN
RETURN cast(@pExpressionDATEReplaced as DATETIME)
END
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END
END --FIN IF ISDATE(@pExpression) = 1
END --FIN IF @pData_Type = 'DATE'
--------------------------------------------------------------------------------
-- NUMERIC
--------------------------------------------------------------------------------
IF @pData_Type LIKE 'NUMERIC%'
BEGIN
IF ISNUMERIC(@pExpression) = 1
BEGIN
DECLARE @TotalDigitsOfType AS INT = SUBSTRING(@pData_Type,CHARINDEX('(',@pData_Type)+1, CHARINDEX(',',@pData_Type) - CHARINDEX('(',@pData_Type) - 1)
, @TotalDecimalsOfType AS INT = SUBSTRING(@pData_Type,CHARINDEX(',',@pData_Type)+1, CHARINDEX(')',@pData_Type) - CHARINDEX(',',@pData_Type) - 1)
, @TotalDigitsOfValue AS INT
, @TotalDecimalsOfValue AS INT
, @TotalWholeDigitsOfType AS INT
, @TotalWholeDigitsOfValue AS INT
SET @pExpression = REPLACE(@pExpression, ',','.')
SET @TotalDigitsOfValue = LEN(REPLACE(@pExpression, '.',''))
SET @TotalDecimalsOfValue = CASE Charindex('.', @pExpression)
WHEN 0
THEN 0
ELSE Len(Cast(Cast(Reverse(CONVERT(VARCHAR(50), @pExpression, 128)) AS FLOAT) AS BIGINT))
END
SET @TotalWholeDigitsOfType = @TotalDigitsOfType - @TotalDecimalsOfType
SET @TotalWholeDigitsOfValue = @TotalDigitsOfValue - @TotalDecimalsOfValue
-- The total digits can not be greater than the p part of NUMERIC (p, s)
-- The total of decimals can not be greater than the part s of NUMERIC (p, s)
-- The total digits of the whole part can not be greater than the subtraction between p and s
IF (@TotalDigitsOfValue <= @TotalDigitsOfType) AND (@TotalDecimalsOfValue <= @TotalDecimalsOfType) AND (@TotalWholeDigitsOfValue <= @TotalWholeDigitsOfType)
BEGIN
DECLARE @pExpressionNUMERIC AS FLOAT
SET @pExpressionNUMERIC = CAST (ROUND(@pExpression, @TotalDecimalsOfValue) AS FLOAT)
RETURN @pExpressionNUMERIC --Returns type FLOAT
END
else
BEGIN
RETURN @pReturnValueIfErrorCast
END-- FIN IF (@TotalDigitisOfValue <= @TotalDigits) AND (@TotalDecimalsOfValue <= @TotalDecimals)
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END --FIN IF ISNUMERIC(@pExpression) = 1
END --IF @pData_Type LIKE 'NUMERIC%'
--------------------------------------------------------------------------------
-- BIT
--------------------------------------------------------------------------------
IF @pData_Type LIKE 'BIT'
BEGIN
IF ISNUMERIC(@pExpression) = 1
BEGIN
RETURN CAST(@pExpression AS BIT)
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END --FIN IF ISNUMERIC(@pExpression) = 1
END --IF @pData_Type LIKE 'BIT'
--------------------------------------------------------------------------------
-- FLOAT
--------------------------------------------------------------------------------
IF @pData_Type LIKE 'FLOAT'
BEGIN
IF ISNUMERIC(REPLACE(REPLACE(@pExpression, CHAR(13), ''), CHAR(10), '')) = 1
BEGIN
RETURN CAST(@pExpression AS FLOAT)
END
ELSE
BEGIN
IF REPLACE(@pExpression, CHAR(13), '') = '' --Only white spaces are replaced, not new lines
BEGIN
RETURN 0
END
ELSE
BEGIN
RETURN @pReturnValueIfErrorCast
END --IF REPLACE(@pExpression, CHAR(13), '') = ''
END --FIN IF ISNUMERIC(@pExpression) = 1
END --IF @pData_Type LIKE 'FLOAT'
--------------------------------------------------------------------------------
-- Any other unsupported data type will return NULL or the value assigned by the user to @pReturnValueIfErrorCast
--------------------------------------------------------------------------------
RETURN @pReturnValueIfErrorCast
END
In addition to @KenM's answer, another important distinction is that, when loading in a saved object, you can assign the contents of an Rds
file. Not so for Rda
> x <- 1:5
> save(x, file="x.Rda")
> saveRDS(x, file="x.Rds")
> rm(x)
## ASSIGN USING readRDS
> new_x1 <- readRDS("x.Rds")
> new_x1
[1] 1 2 3 4 5
## 'ASSIGN' USING load -- note the result
> new_x2 <- load("x.Rda")
loading in to <environment: R_GlobalEnv>
> new_x2
[1] "x"
# NOTE: `load()` simply returns the name of the objects loaded. Not the values.
> x
[1] 1 2 3 4 5
Since the parent-child interaction is not an easy task to do. But by having a reference for the parent component in the child component it would be much easier to interact. In my method, you need to first pass a reference of the parent component by calling the function of the child component. Here is the for this method.
The Code For Child Component.
import { Component, Input,ElementRef,Renderer2 } from '@angular/core';
import { ParentComponent } from './parent.component';
@Component({
selector: 'qb-child',
template: `<div class="child"><button (click)="parentClickFun()">Show text Of Parent Element</button><button (click)="childClickFun()">Show text Of Child Element</button><ng-content></ng-content></div>`,
styleUrls: ['./app.component.css']
})
export class ChildComponent {
constructor(private el: ElementRef,private rend: Renderer2){
};
qbParent:ParentComponent;
getParent(parentEl):void{
this.qbParent=parentEl;
console.log(this.el.nativeElement.innerText);
}
@Input() name: string;
childClickFun():void{
console.log("Properties of Child Component is Accessed");
}
parentClickFun():void{
this.qbParent.callFun();
}
}
This is Code for parent Component
import { Component, Input , AfterViewInit,ContentChild,ElementRef,Renderer2} from '@angular/core';
import { ChildComponent } from './child.component';
@Component({
selector: 'qb-parent',
template: `<div class="parent"><ng-content></ng-content></div>`,
styleUrls: ['./app.component.css']
})
export class ParentComponent implements AfterViewInit {
constructor(private el: ElementRef,private rend: Renderer2){
};
@Input() name: string;
@ContentChild(ChildComponent,{read:ChildComponent,static:true}) qbChild:ChildComponent;
ngAfterViewInit():void{
this.qbChild.getParent(this);
}
callFun():void{
console.log("Properties of Parent Component is Accessed");
}
}
The Html Code
<qb-parent>
This is Parent
<qb-child>
This is Child
</qb-child>
</qb-parent>
Here we pass the parent component by calling a function of the child component. The link below is an example of this method. Click here!
Yes! : Android Scripting Environment
An example via Matt Cutts via SL4A -- "here’s a barcode scanner written in six lines of Python code:
import android
droid = android.Android()
code = droid.scanBarcode()
isbn = int(code['result']['SCAN_RESULT'])
url = "http://books.google.com?q=%d" % isbn
droid.startActivity('android.intent.action.VIEW', url)
Thought this might be helpful to some who are using Javascript and/or Typescript in 2019.
I found the following, as some have suggested, to be incorrect:
let img = new Image();
img.onload = function() {
console.log(this.width, this.height) // Error: undefined is not an object
};
img.src = "http://example.com/myimage.jpg";
This is correct:
let img = new Image();
img.onload = function() {
console.log(img.width, img.height)
};
img.src = "http://example.com/myimage.jpg";
Conclusion:
Use img
, not this
, in onload
function.
Probably because you had something like this?
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
Uri fileUri = CommonUtilities.getTBCameraOutputMediaFileUri();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(takePictureIntent, 2);
However you must not put the extra output into the intent, because then the data goes into the URI instead of the data variable. For that reason, you have to take the two lines in the middle out, so that you have
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, 2);
That´s what caused the problem for me, hope that helped.
I had to use the install
function instead:
conda install pandas=0.13.1
Here's an example to make it clear how things work with GCC when static libraries are involved. So let's assume we have the following scenario:
myprog.o
- containing main()
function, dependent on libmysqlclient
libmysqlclient
- static, for the sake of the example (you'd prefer the shared library, of course, as the libmysqlclient
is huge); in /usr/local/lib
; and dependent on stuff from libz
libz
(dynamic)How do we link this? (Note: examples from compiling on Cygwin using gcc 4.3.4)
gcc -L/usr/local/lib -lmysqlclient myprog.o
# undefined reference to `_mysql_init'
# myprog depends on libmysqlclient
# so myprog has to come earlier on the command line
gcc myprog.o -L/usr/local/lib -lmysqlclient
# undefined reference to `_uncompress'
# we have to link with libz, too
gcc myprog.o -lz -L/usr/local/lib -lmysqlclient
# undefined reference to `_uncompress'
# libz is needed by libmysqlclient
# so it has to appear *after* it on the command line
gcc myprog.o -L/usr/local/lib -lmysqlclient -lz
# this works
I know this is an older question, but I felt the answer from t3chb0t led me to the best path and felt like sharing. You don't even need to go so far as implementing all the formatter's methods. I did the following for the content-type "application/vnd.api+json" being returned by an API I was using:
public class VndApiJsonMediaTypeFormatter : JsonMediaTypeFormatter
{
public VndApiJsonMediaTypeFormatter()
{
SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/vnd.api+json"));
}
}
Which can be used simply like the following:
HttpClient httpClient = new HttpClient("http://api.someaddress.com/");
HttpResponseMessage response = await httpClient.GetAsync("person");
List<System.Net.Http.Formatting.MediaTypeFormatter> formatters = new List<System.Net.Http.Formatting.MediaTypeFormatter>();
formatters.Add(new System.Net.Http.Formatting.JsonMediaTypeFormatter());
formatters.Add(new VndApiJsonMediaTypeFormatter());
var responseObject = await response.Content.ReadAsAsync<Person>(formatters);
Super simple and works exactly as I expected.
In an activity you can call recreate()
to "recreate" the activity (API 11+)
This code worked fine for me.
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
public class SaveImageFromUrl {
public static void main(String[] args) throws Exception {
String imageUrl = "http://www.avajava.com/images/avajavalogo.jpg";
String destinationFile = "image.jpg";
saveImage(imageUrl, destinationFile);
}
public static void saveImage(String imageUrl, String destinationFile) throws IOException {
URL url = new URL(imageUrl);
InputStream is = url.openStream();
OutputStream os = new FileOutputStream(destinationFile);
byte[] b = new byte[2048];
int length;
while ((length = is.read(b)) != -1) {
os.write(b, 0, length);
}
is.close();
os.close();
}
}
Data contract: It specifies that your entity class is ready for Serialization process.
Data members: It specifies that the particular field is part of the data contract and it can be serialized.
I found this resource that details the various methods: How to embed TIFF files in HTML documents
As mentioned, it will very much depend on browser support for the format. Viewing that page in Chrome on Windows didn't display any of the images.
It would also be helpful if you posted the code you've tried already.
You probably are looking for find_in_set
function:
Where find_in_set($needle,'column') > 0
This function acts like in_array
function in PHP
Make use of the log10
function to determine the number of digits and do like below:
char * toArray(int number)
{
int n = log10(number) + 1;
int i;
char *numberArray = calloc(n, sizeof(char));
for (i = n-1; i >= 0; --i, number /= 10)
{
numberArray[i] = (number % 10) + '0';
}
return numberArray;
}
Or the other option is sprintf(yourCharArray,"%ld", intNumber);
var img = new Image();
img.src = sYourFilePath;
var iSize = img.fileSize;
I could get solution for such a similar problem with addition of a simple line
HttpURLConnection hConn = (HttpURLConnection) url.openConnection();
hConn.setRequestMethod("HEAD");
My requirement was to know the response code and for that just getting the meta-information was sufficient, instead of getting the complete response body.
Default request method is GET and that was taking lot of time to return, finally throwing me SocketTimeoutException. The response was pretty fast when I set the Request Method to HEAD.
There exists an easy work-around.
TL;DR - Use ast.literal_eval()
instead of json.loads()
. Both ast
and json
are in the standard library.
While not a 'perfect' answer, it gets one pretty far if your plan is to ignore Unicode altogether. In Python 2.7
import json, ast
d = { 'field' : 'value' }
print "JSON Fail: ", json.loads(json.dumps(d))
print "AST Win:", ast.literal_eval(json.dumps(d))
gives:
JSON Fail: {u'field': u'value'}
AST Win: {'field': 'value'}
This gets more hairy when some objects are really Unicode strings. The full answer gets hairy quickly.
You can just do:
string myStr = "The quick brown fox jumps over the lazy dog";
string[] ssizes = myStr.Split(' ');
MSDN has more examples and references:
When I did just a remove the option remained in the ddl on the view, but was gone in the html (if u inspect the page)
$("#ddlSelectList option[value='2']").remove(); //removes the option with value = 2
$('#ddlSelectList').val('').trigger('chosen:updated'); //refreshes the drop down list
This came from standford's sna free tutorial and it states that ...
# Reachability can only be computed on one vertex at a time. To
# get graph-wide statistics, change the value of "vertex"
# manually or write a for loop. (Remember that, unlike R objects,
# igraph objects are numbered from 0.)
ok, so when ever using igraph, the first roll/column is 0 other than 1, but matrix starts at 1, thus for any calculation under igraph, you would need x-1, shown at
this_node_reach <- subcomponent(g, (i - 1), mode = m)
but for the alter calculation, there is a typo here
alter = this_node_reach[j] + 1
delete +1 and it will work alright
I like to use flutter_mobx for this and work on the state.
Next I use an observer:
Container(child: Observer(builder: (_) {
var method;
if (!controller.isDisabledButton) method = controller.methodController;
return RaiseButton(child: Text('Test') onPressed: method);
}));
On the Controller:
@observable
bool isDisabledButton = true;
Then inside the control you can manipulate this variable as you want.
Refs.: Flutter mobx
You should already have all needed variables in /etc/profile.d/oracle.sh
. Make sure you source it:
$ source /etc/profile.d/oracle.sh
The file's content looks like:
ORACLE_HOME=/usr/lib/oracle/11.2/client64
PATH=$ORACLE_HOME/bin:$PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib
export ORACLE_HOME
export LD_LIBRARY_PATH
export PATH
If you don't have it, create it and source it.
Consider it this way:
Pass: Python works purely on indentation! There are no empty curly braces, unlike other languages.
So, if you want to do nothing in case a condition is true there is no option other than pass.
Continue: This is useful only in case of loops. In case, for a range of values, you don't want to execute the remaining statements of the loop after that condition is true for that particular pass, then you will have to use continue.
These messages are rather misleading and understandably a source of confusion. Older Ubuntu versions used Libav which is a fork of the FFmpeg project. FFmpeg returned in Ubuntu 15.04 "Vivid Vervet".
The fork was basically a non-amicable result of conflicting personalities and development styles within the FFmpeg community. It is worth noting that the maintainer for Debian/Ubuntu switched from FFmpeg to Libav on his own accord due to being involved with the Libav fork.
ffmpeg
vs the fake oneFor a while both Libav and FFmpeg separately developed their own version of ffmpeg
.
Libav then renamed their bizarro ffmpeg
to avconv
to distance themselves from the FFmpeg project. During the transition period the "not developed anymore" message was displayed to tell users to start using avconv
instead of their counterfeit version of ffmpeg
. This confused users into thinking that FFmpeg (the project) is dead, which is not true. A bad choice of words, but I can't imagine Libav not expecting such a response by general users.
This message was removed upstream when the fake "ffmpeg
" was finally removed from the Libav source, but, depending on your version, it can still show up in Ubuntu because the Libav source Ubuntu uses is from the ffmpeg-to-avconv transition period.
In June 2012, the message was re-worded for the package libav - 4:0.8.3-0ubuntu0.12.04.1
. Unfortunately the new "deprecated" message has caused additional user confusion.
Starting with Ubuntu 15.04 "Vivid Vervet", FFmpeg's ffmpeg
is back in the repositories again.
To further complicate matters, Libav chose a name that was historically used by FFmpeg to refer to its libraries (libavcodec, libavformat, etc). For example the libav-user mailing list, for questions and discussions about using the FFmpeg libraries, is unrelated to the Libav project.
If you are using avconv
then you are using Libav. If you are using ffmpeg
you could be using FFmpeg or Libav. Refer to the first line in the console output to tell the difference: the copyright notice will either mention FFmpeg or Libav.
Secondly, the version numbering schemes differ. Each of the FFmpeg or Libav libraries contains a version.h
header which shows a version number. FFmpeg will end in three digits, such as 57.67.100, and Libav will end in one digit such as 57.67.0. You can also view the library version numbers by running ffmpeg
or avconv
and viewing the console output.
ffmpeg
The real ffmpeg
is in the repository, so you can install it with:
apt-get install ffmpeg
Your options are:
ffmpeg
,ffmpeg
,These methods are non-intrusive, reversible, and will not interfere with the system or any repository packages.
Another possible option is to upgrade to Ubuntu 15.04 "Vivid Vervet" or newer and just use ffmpeg
from the repository.
For an interesting blog article on the situation, as well as a discussion about the main technical differences between the projects, see The FFmpeg/Libav situation.
As @Peter Cullen answer mention, your script will meet browser timeout first. So its good idea to provide some log output, then flush()
, but connection have buffer and you'll not see anything unless much output provided. Here are code snippet what helps provide reliable log:
set_time_limit(0);
...
print "log message";
print "<!--"; print str_repeat (' ', 4000); print "-->"; flush();
print "log message";
print "<!--"; print str_repeat (' ', 4000); print "-->"; flush();
Compare every key in mapB against the counterpart in mapA. Then check if there is any key in mapA not existing in mapB
public boolean mapsAreEqual(Map<String, String> mapA, Map<String, String> mapB) {
try{
for (String k : mapB.keySet())
{
if (!mapA.get(k).equals(mapB.get(k))) {
return false;
}
}
for (String y : mapA.keySet())
{
if (!mapB.containsKey(y)) {
return false;
}
}
} catch (NullPointerException np) {
return false;
}
return true;
}
I take it from your question that your hover effect changes the content of your page. In that case, my advice is to:
touchstart
and mouseenter
.mouseleave
, touchmove
and click
.Alternatively, you can edit your page that there is no content change.
In order to simulate a mouse, browsers such as Webkit mobile fire the following events if a user touches and releases a finger on touch screen (like iPad) (source: Touch And Mouse on html5rocks.com):
touchstart
touchmove
touchend
mouseover
mouseenter
mouseover
, mouseenter
or mousemove
event changes the page content, the following events are never fired.mousemove
mousedown
mouseup
click
It does not seem possible to simply tell the webbrowser to skip the mouse events.
What's worse, if a mouseover event changes the page content, the click event is never fired, as explained on Safari Web Content Guide - Handling Events, in particular figure 6.4 in One-Finger Events. What exactly a "content change" is, will depend on browser and version. I've found that for iOS 7.0, a change in background color is not (or no longer?) a content change.
To recap:
touchstart
and mouseenter
.mouseleave
, touchmove
and click
.Note that there is no action on touchend
!
This clearly works for mouse events: mouseenter
and mouseleave
(slightly improved versions of mouseover
and mouseout
) are fired, and add and remove the hover.
If the user actually click
s a link, the hover effect is also removed. This ensure that it is removed if the user presses the back button in the web browser.
This also works for touch events: on touchstart the hover effect is added. It is '''not''' removed on touchend. It is added again on mouseenter
, and since this causes no content changes (it was already added), the click
event is also fired, and the link is followed without the need for the user to click again!
The 300ms delay that a browser has between a touchstart
event and click
is actually put in good use because the hover effect will be shown during this short time.
If the user decides to cancel the click, a move of the finger will do so just as normal. Normally, this is a problem since no mouseleave
event is fired, and the hover effect remains in place. Thankfully, this can easily be fixed by removing the hover effect on touchmove
.
That's it!
Note that it is possible to remove the 300ms delay, for example using the FastClick library, but this is out of scope for this question.
I've found the following problems with the following alternatives:
touchend
: This will incorrectly follow the link, even if the user only wanted to scroll or zoom, without the intention of actually clicking the link.touchend
that is used as a if-condition in subsequent mouse events to prevents state changes at that point in time. The variable is reset in the click event. See Walter Roman's answer on this page. This is a decent solution if you really don't want a hover effect on touch interfaces. Unfortunately, this does not work if a touchend
is fired for another reason and no click event is fired (e.g. the user scrolled or zoomed), and is subsequently trying to following the link with a mouse (i.e on a device with both mouse and touch interface).mouseover
or mousemove
event.This is how I solved this problem
$scope.downloadPDF = function () {
var link = document.createElement("a");
link.setAttribute("href", "path_to_pdf_file/pdf_filename.pdf");
link.setAttribute("download", "download_name.pdf");
document.body.appendChild(link); // Required for FF
link.click(); // This will download the data file named "download_name.pdf"
}
If you have too many installers to find what you are looking for easily, here is some powershell to provide a filter and narrow it down a little by display name.
$filter = "*core*sdk*"; (Get-ChildItem HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall).Name | % { $path = "Registry::$_"; Get-ItemProperty $path } | Where-Object { $_.DisplayName -like $filter } | Select-Object -Property DisplayName, PsChildName
try this:
import sys
sys.argv = ['arg1', 'arg2']
execfile('abc.py')
Note that when abc.py
finishes, control will be returned to the calling program. Note too that abc.py
can call quit()
if indeed finished.
try this
<iframe name="myIframe" id="myIframe" width="400px" height="400px" runat="server"></iframe>
Expose this iframe in the master page's codebehind:
public HtmlControl iframe
{
get
{
return this.myIframe;
}
}
Add the MasterType directive for the content page to strongly typed Master Page.
<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits=_Default" Title="Untitled Page" %>
<%@ MasterType VirtualPath="~/MasterPage.master" %>
In code behind
protected void Page_Load(object sender, EventArgs e)
{
this.Master.iframe.Attributes.Add("src", "some.aspx");
}
If you need to do this for a large number of textboxes (in Silverlight or WPF), then you can use the technique used in the blog post: http://dnchannel.blogspot.com/2010/01/silverlight-3-auto-select-text-in.html. It uses Attached Properties and Routed Events.
this worked for me....
I added the following line to properties in pom.xml
<properties>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
The problem is insufficient memory to load context.
Try to set VM options:
-da -Xmx2048m -Xms1024m -XX:MaxPermSize=2048m
Since Sheet.getPhysicalNumberOfRows()
does not count empty rows and Sheet.getLastRowNum()
returns 0 both if there is one row or no rows, I use a combination of the two methods to accurately calculate the total number of rows.
int rowTotal = sheet.getLastRowNum();
if ((rowTotal > 0) || (sheet.getPhysicalNumberOfRows() > 0)) {
rowTotal++;
}
Note: This will treat a spreadsheet with one empty row as having none but for most purposes this is probably okay.
You can achieve this with the following code:
$("input").change(function(e) {
for (var i = 0; i < e.originalEvent.srcElement.files.length; i++) {
var file = e.originalEvent.srcElement.files[i];
var img = document.createElement("img");
var reader = new FileReader();
reader.onloadend = function() {
img.src = reader.result;
}
reader.readAsDataURL(file);
$("input").after(img);
}
});
https://www.youtube.com/watch?v=jV8B24rSN5o
I think you can use display as grid:
.parent { display: grid };
Even without cloning or fetching, you can check the list of tags on the upstream repo with git ls-remote
:
git ls-remote --tags /url/to/upstream/repo
(as illustrated in "When listing git-ls-remote why there's “^{}
” after the tag name?")
xbmono illustrates in the comments that quotes are needed:
git ls-remote --tags /some/url/to/repo "refs/tags/MyTag^{}"
Note that you can always push your commits and tags in one command with (git 1.8.3+, April 2013):
git push --follow-tags
See Push git commits & tags simultaneously.
Regarding Atlassian SourceTree specifically:
Note that, from this thread, SourceTree ONLY shows local tags.
There is an RFE (Request for Enhancement) logged in SRCTREEWIN-4015
since Dec. 2015.
A simple workaround:
see a list of only unpushed tags?
git push --tags
or check the "
Push all tags
" box on the "Push" dialog box, all tags will be pushed to your remote.
That way, you will be "sure that they are present in remote so that other developers can pull them".
You should find the 'expect' command will do what you need it to do. Its widely available. See here for an example : http://www.thegeekstuff.com/2010/10/expect-examples/
(very rough example)
#!/usr/bin/expect
set pass "mysecret"
spawn /usr/bin/passwd
expect "password: "
send "$pass"
expect "password: "
send "$pass"
I was facing the Same Error.
Solution: The name of the variable in the View through which we are passing value to Controller should Match the Name of Variable on Controller Side.
.csHtml (View) :
@Html.ActionLink("Edit", "Edit" , new { id=item.EmployeeId })
.cs (Controller Method):
[HttpGet]
public ActionResult Edit(int id)
{
EmployeeContext employeeContext = new EmployeeContext();
Employee employee = employeeContext.Employees.Where(emp => emp.EmployeeId == id).First();
return View(employee);
}
this can be achieved with the css calc()
operator
@media screen and (min-width: 480px) {
body {
background-color: lightgreen;
zoom:calc(100% / 480);
}
}
In Notepad++ v7.8.9 you can use the Tab
key to increase the indention level, and use Shift + Tab
to decrease the indentation level.
You would need to use the following markup. If you want to float any menu items to the right, create a separate <ul class="nav navbar-nav">
with navbar-right
class to it.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<html>_x000D_
_x000D_
<head>_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />_x000D_
</head>_x000D_
_x000D_
<body>_x000D_
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">_x000D_
<div class="container">_x000D_
<div class="navbar-header">_x000D_
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">_x000D_
<span class="sr-only">Toggle navigation</span>_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
<span class="icon-bar"></span>_x000D_
</button>_x000D_
<a class="navbar-brand" href="#">Project name</a>_x000D_
</div>_x000D_
<div class="collapse navbar-collapse">_x000D_
<ul class="nav navbar-nav">_x000D_
<li class="active"><a href="#">Home</a></li>_x000D_
<li><a href="#about">About</a></li>_x000D_
_x000D_
</ul>_x000D_
<ul class="nav navbar-nav navbar-right">_x000D_
<li><a href="#contact">Contact</a></li>_x000D_
</ul>_x000D_
</div>_x000D_
</div>_x000D_
</div>_x000D_
</body>_x000D_
_x000D_
</html>
_x000D_