ASP.NET MVC 3 Razor: Include JavaScript file in the head tag
You can use Named Sections.
_Layout.cshtml
<head>
<script type="text/javascript" src="@Url.Content("/Scripts/jquery-1.6.2.min.js")"></script>
@RenderSection("JavaScript", required: false)
</head>
_SomeView.cshtml
@section JavaScript
{
<script type="text/javascript" src="@Url.Content("/Scripts/SomeScript.js")"></script>
<script type="text/javascript" src="@Url.Content("/Scripts/AnotherScript.js")"></script>
}
String length in bytes in JavaScript
Here is an independent and efficient method to count UTF-8 bytes of a string.
//count UTF-8 bytes of a string_x000D_
function byteLengthOf(s){_x000D_
//assuming the String is UCS-2(aka UTF-16) encoded_x000D_
var n=0;_x000D_
for(var i=0,l=s.length; i<l; i++){_x000D_
var hi=s.charCodeAt(i);_x000D_
if(hi<0x0080){ //[0x0000, 0x007F]_x000D_
n+=1;_x000D_
}else if(hi<0x0800){ //[0x0080, 0x07FF]_x000D_
n+=2;_x000D_
}else if(hi<0xD800){ //[0x0800, 0xD7FF]_x000D_
n+=3;_x000D_
}else if(hi<0xDC00){ //[0xD800, 0xDBFF]_x000D_
var lo=s.charCodeAt(++i);_x000D_
if(i<l&&lo>=0xDC00&&lo<=0xDFFF){ //followed by [0xDC00, 0xDFFF]_x000D_
n+=4;_x000D_
}else{_x000D_
throw new Error("UCS-2 String malformed");_x000D_
}_x000D_
}else if(hi<0xE000){ //[0xDC00, 0xDFFF]_x000D_
throw new Error("UCS-2 String malformed");_x000D_
}else{ //[0xE000, 0xFFFF]_x000D_
n+=3;_x000D_
}_x000D_
}_x000D_
return n;_x000D_
}_x000D_
_x000D_
var s="\u0000\u007F\u07FF\uD7FF\uDBFF\uDFFF\uFFFF";_x000D_
console.log("expect byteLengthOf(s) to be 14, actually it is %s.",byteLengthOf(s));Note that the method may throw error if an input string is UCS-2 malformed
List all of the possible goals in Maven 2?
A Build Lifecycle is Made Up of Phases
Each of these build lifecycles is defined by a different list of build phases, wherein a build phase represents a stage in the lifecycle.
For example, the default lifecycle comprises of the following phases (for a complete list of the lifecycle phases, refer to the Lifecycle Reference):
- validate - validate the project is correct and all necessary information is available
- compile - compile the source code of the project
- test - test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed
- package - take the compiled code and package it in its distributable format, such as a JAR. verify - run any checks on results of integration tests to ensure quality criteria are met
- install - install the package into the local repository, for use as a dependency in other projects locally
- deploy - done in the build environment, copies the final package to the remote repository for sharing with other developers and projects.
These lifecycle phases (plus the other lifecycle phases not shown here) are executed sequentially to complete the default lifecycle. Given the lifecycle phases above, this means that when the default lifecycle is used, Maven will first validate the project, then will try to compile the sources, run those against the tests, package the binaries (e.g. jar), run integration tests against that package, verify the integration tests, install the verified package to the local repository, then deploy the installed package to a remote repository.
Source: https://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html
Laravel Mail::send() sending to multiple to or bcc addresses
the accepted answer does not work any longer with laravel 5.3 because mailable tries to access ->email and results in
ErrorException in Mailable.php line 376: Trying to get property of non-object
a working code for laravel 5.3 is this:
$users_temp = explode(',', '[email protected],[email protected]');
$users = [];
foreach($users_temp as $key => $ut){
$ua = [];
$ua['email'] = $ut;
$ua['name'] = 'test';
$users[$key] = (object)$ua;
}
Mail::to($users)->send(new OrderAdminSendInvoice($o));
Select multiple columns from a table, but group by one
==EDIT==
I checked your question again and have concluded this can't be done.
ProductName is not unique, It must either be part of the Group By or excluded from your results.
For example how would SQL present these results to you if you Group By only ProductID?
ProductID | ProductName | OrderQuantity
---------------------------------------
1234 | abc | 1
1234 | def | 1
1234 | ghi | 1
1234 | jkl | 1
ActiveXObject is not defined and can't find variable: ActiveXObject
ActiveXObject is non-standard and only supported by Internet Explorer on Windows.
There is no native cross browser way to write to the file system without using plugins, even the draft File API gives read only access.
If you want to work cross platform, then you need to look at such things as signed Java applets (keeping in mind that that will only work on platforms for which the Java runtime is available).
a page can have only one server-side form tag
It sounds like you have a form tag in a Master Page and in the Page that is throwing the error.
You can have only one.
Python Inverse of a Matrix
If you hate numpy, get out RPy and your local copy of R, and use it instead.
(I would also echo to make you you really need to invert the matrix. In R, for example, linalg.solve and the solve() function don't actually do a full inversion, since it is unnecessary.)
Getting Data from Android Play Store
Disclaimer: I am from 42matters, who provides this data already on https://42matters.com/api , feel free to check it out or drop us a line.
As lenik mentioned there are open-source libraries that already help with obtaining some data from GPlay. If you want to build one yourself you can try to parse the Google Play App page, but you should pay attention to the following:
- Make sure the URL you are trying to parse is not blocked in robots.txt - e.g. https://play.google.com/robots.txt
- Make sure that you are not doing it too often, Google will throttle and potentially blacklist you if you are doing it too much.
- Send a correct User-Agent header to actually show you are a bot
- The page of an app is big - make sure you accept gzip and request the mobile version
- GPlay website is not an API, it doesn't care that you parse it so it will change over time. Make sure you handle changes - e.g. by having test to make sure you get what you expected.
So that in mind getting one page metadata is a matter of fetching the page html and parsing it properly. With JSoup you can try:
HttpClient httpClient = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(crawlUrl);
HttpResponse rsp = httpClient.execute(request);
int statusCode = rsp.getStatusLine().getStatusCode();
if (statusCode == 200) {
String content = EntityUtils.toString(rsp.getEntity());
Document doc = Jsoup.parse(content);
//parse content, whatever you need
Element price = doc.select("[itemprop=price]").first();
}
For that very simple use case that should get you started. However, the moment you want to do more interesting stuff, things get complicated:
- Search is forbidden in robots.
- Keeping app metadata up-to-date is hard to do. There are more than 2.2m apps, if you want to refresh their metadata daily there are 2.2 requests/day, which will 1) get blocked immediately, 2) costs a lot of money - pessimistic 220gb data transfer per day if one app is 100k
- How do you discover new apps
- How do you get pricing in each country, translations of each language
The list goes on. If you don't want to do all this by yourself, you can consider 42matters API, which supports lookup and search, top google charts, advanced queries and filters. And this for 35 languages and more than 50 countries.
[2]:
filtering a list using LINQ
Based on http://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b,
EqualAll is the approach that best meets your needs.
public void Linq96()
{
var wordsA = new string[] { "cherry", "apple", "blueberry" };
var wordsB = new string[] { "cherry", "apple", "blueberry" };
bool match = wordsA.SequenceEqual(wordsB);
Console.WriteLine("The sequences match: {0}", match);
}
Need table of key codes for android and presenter
They are ASCII dec codes. A full table can be found here.
Simple PHP calculator
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Calculator</title>
</head>
<body>
<form method="GET">
<h1>Calculator</h1>
<p>This is a calculator made by Hau Teen Yee Fabrice and is free to use.</p>
<ul>
<ol> Multiplication: * </ol>
<ol> Substraction: - </ol>
<ol> Division: / </ol>
<ol> Addition: + </ol>
</ul>
<p>Enter first number:</p>
<input type="text" name="cal1">
<p>Enter second number:</p>
<input type="text" name="cal2">
<p>Enter the calculator symbol</p>
<input type="text" name="symbol">
<button>Calculate</button>
</form>
<?php
$cal1= $_GET['cal1'];
$cal2= $_GET['cal2'];
$symbol =$_GET['symbol'];
if($symbol == '+')
{
$add = $cal1 + $cal2;
echo "Addition is:".$add;
}
else if($symbol == '-')
{
$subs = $cal1 - $cal2;
echo "Substraction is:".$subs;
}
else if($symbol == '*')
{
$mul = $cal1 * $cal2;
echo "Multiply is:".$mul;
}
else if($symbol == '/')
{
$div = $cal1 / $cal2;
echo "Division is:".$div;
}
else
{
echo "Oops ,something wrong in your code son";
}
?>
</body>
</html>
Days between two dates?
Assuming you’ve literally got two date objects, you can subtract one from the other and query the resulting timedelta object for the number of days:
>>> from datetime import date
>>> a = date(2011,11,24)
>>> b = date(2011,11,17)
>>> a-b
datetime.timedelta(7)
>>> (a-b).days
7
And it works with datetimes too — I think it rounds down to the nearest day:
>>> from datetime import datetime
>>> a = datetime(2011,11,24,0,0,0)
>>> b = datetime(2011,11,17,23,59,59)
>>> a-b
datetime.timedelta(6, 1)
>>> (a-b).days
6
What is the difference between compileSdkVersion and targetSdkVersion?
The compileSdkVersion should be newest stable version.
The targetSdkVersion should be fully tested and less or equal to compileSdkVersion.
How to highlight cell if value duplicate in same column for google spreadsheet?
Answer of @zolley is right. Just adding a Gif and steps for the reference.
- Goto menu
Format > Conditional formatting.. - Find
Format cells if.. - Add
=countif(A:A,A1)>1in fieldCustom formula is- Note: Change the letter
Awith your own column.
- Note: Change the letter
How can I set a dynamic model name in AngularJS?
You can use something like this scopeValue[field], but if your field is in another object you will need another solution.
To solve all kind of situations, you can use this directive:
this.app.directive('dynamicModel', ['$compile', '$parse', function ($compile, $parse) {
return {
restrict: 'A',
terminal: true,
priority: 100000,
link: function (scope, elem) {
var name = $parse(elem.attr('dynamic-model'))(scope);
elem.removeAttr('dynamic-model');
elem.attr('ng-model', name);
$compile(elem)(scope);
}
};
}]);
Html example:
<input dynamic-model="'scopeValue.' + field" type="text">
Find first element in a sequence that matches a predicate
J.F. Sebastian's answer is most elegant but requires python 2.6 as fortran pointed out.
For Python version < 2.6, here's the best I can come up with:
from itertools import repeat,ifilter,chain
chain(ifilter(predicate,seq),repeat(None)).next()
Alternatively if you needed a list later (list handles the StopIteration), or you needed more than just the first but still not all, you can do it with islice:
from itertools import islice,ifilter
list(islice(ifilter(predicate,seq),1))
UPDATE: Although I am personally using a predefined function called first() that catches a StopIteration and returns None, Here's a possible improvement over the above example: avoid using filter / ifilter:
from itertools import islice,chain
chain((x for x in seq if predicate(x)),repeat(None)).next()
Get filename from input [type='file'] using jQuery
This was a very important issue for me in order for my site to be multilingual. So here is my conclusion tested in Firefox and Chrome.
jQuery trigger comes in handy.
So this hides the standard boring type=file labels. You can place any label you want and format anyway. I customized a script from http://demo.smarttutorials.net/ajax1/. The script allows multiple file uploads with thumbnail preview and uses PHP and MySQL.
<form enctype="multipart/form-data" name='imageform' role="form" ="imageform" method="post" action="upload_ajax.php">
<div class="form-group">
<div id="select_file">Select a file</div>
<input class='file' type="file" style="display: none " class="form-control" name="images_up" id="images_up" placeholder="Please choose your image">
<div id="my_file"></div>
<span class="help-block"></span>
</div>
<div id="loader" style="display: none;">
Please wait image uploading to server....
</div>
<input type="submit" value="Upload" name="image_upload" id="image_upload" class="btn"/>
</form>
$('#select_file').click(function() {
$('#images_up').trigger('click');
$('#images_up').change(function() {
var filename = $('#images_up').val();
if (filename.substring(3,11) == 'fakepath') {
filename = filename.substring(12);
} // Remove c:\fake at beginning from localhost chrome
$('#my_file').html(filename);
});
});
Getting list of tables, and fields in each, in a database
Tables ::
SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'
columns ::
SELECT * FROM INFORMATION_SCHEMA.COLUMNS
or
SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='your_table_name'
NoClassDefFoundError on Maven dependency
when I try to run it, I get NoClassDefFoundError
Run it how? You're probably trying to run it with eclipse without having correctly imported your maven classpath. See the m2eclipse plugin for integrating maven with eclipse for that.
To verify that your maven config is correct, you could run your app with the exec plugin using:
mvn exec:java -D exec.mainClass=<your main class>
Update: First, regarding your error when running exec:java, your main class is tr.edu.hacettepe.cs.b21127113.bil138_4.App. When talking about class names, they're (almost) always dot-separated. The simple class name is just the last part: App in your case. The fully-qualified name is the full package plus the simple class name, and that's what you give to maven or java when you want to run something. What you were trying to use was a file system path to a source file. That's an entirely different beast. A class name generally translates directly to a class file that's found in the class path, as compared to a source file in the file system. In your specific case, the class file in question would probably be at target/classes/tr/edu/hacettepe/cs/b21127113/bil138_4/App.class because maven compiles to target/classes, and java traditionally creates a directory for each level of packaging.
Your original problem is simply that you haven't put the Jackson jars on your class path. When you run a java program from the command line, you have to set the class path to let it know where it can load classes from. You've added your own jar, but not the other required ones. Your comment makes me think you don't understand how to manually build a class path. In short, the class path can have two things: directories containing class files and jars containing class files. Directories containing jars won't work. For more details on building a class path, see "Setting the class path" and the java and javac tool documentation.
Your class path would need to be at least, and without the line feeds:
target/bil138_4-0.0.1-SNAPSHOT.jar:
/home/utdemir/.m2/repository/org/codehaus/jackson/jackson-core-asl/1.9.6/jackson-core-asl-1.9.6.jar:
/home/utdemir/.m2/repository/org/codehaus/jackson/jackson-mapper-asl/1.9.6/jackson-mapper-asl-1.9.6.jar
Note that the separator on Windows is a semicolon (;).
I apologize for not noticing it sooner. The problem was sitting there in your original post, but I missed it.
Why an inline "background-image" style doesn't work in Chrome 10 and Internet Explorer 8?
As c-smile mentioned: Just need to remove the apostrophes in the url():
<div style="background-image: url(http://i54.tinypic.com/4zuxif.jpg)"></div>
How to convert JSON string to array
There is a problem with the string you are calling a json. I have made some changes to it below. If you properly format the string to a correct json, the code below works.
$str = '{
"action" : "create",
"record": {
"type": "n$product",
"fields": {
"nname": "Bread",
"nprice": 2.11
},
"namespaces": { "my.demo": "n" }
}
}';
$response = json_decode($str, TRUE);
echo '<br> action' . $response["action"] . '<br><br>';
How to append text to a text file in C++?
You could also do it like this
#include <fstream>
int main(){
std::ofstream ost {outputfile, std::ios_base::app};
ost.open(outputfile);
ost << "something you want to add to your outputfile";
ost.close();
return 0;
}
How do I combine two data-frames based on two columns?
See the documentation on ?merge, which states:
By default the data frames are merged on the columns with names they both have,
but separate specifications of the columns can be given by by.x and by.y.
This clearly implies that merge will merge data frames based on more than one column. From the final example given in the documentation:
x <- data.frame(k1=c(NA,NA,3,4,5), k2=c(1,NA,NA,4,5), data=1:5)
y <- data.frame(k1=c(NA,2,NA,4,5), k2=c(NA,NA,3,4,5), data=1:5)
merge(x, y, by=c("k1","k2")) # NA's match
This example was meant to demonstrate the use of incomparables, but it illustrates merging using multiple columns as well. You can also specify separate columns in each of x and y using by.x and by.y.
How to make a new List in Java
In Java 8
To create a non-empty list of fixed size (operations like add, remove, etc., are not supported):
List<Integer> list = Arrays.asList(1, 2); // but, list.set(...) is supported
To create a non-empty mutable list:
List<Integer> list = new ArrayList<>(Arrays.asList(3, 4));
In Java 9
Using a new List.of(...) static factory methods:
List<Integer> immutableList = List.of(1, 2);
List<Integer> mutableList = new ArrayList<>(List.of(3, 4));
In Java 10
Using the Local Variable Type Inference:
var list1 = List.of(1, 2);
var list2 = new ArrayList<>(List.of(3, 4));
var list3 = new ArrayList<String>();
And follow best practices...
Don't use raw types
Since Java 5, generics have been a part of the language - you should use them:
List<String> list = new ArrayList<>(); // Good, List of String
List list = new ArrayList(); // Bad, don't do that!
Program to interfaces
For example, program to the List interface:
List<Double> list = new ArrayList<>();
Instead of:
ArrayList<Double> list = new ArrayList<>(); // This is a bad idea!
Set the location in iPhone Simulator
Pre iOS 5 you could do it in code:
I use this snippet just before the @implementation of the class where I need my fake heading and location data.
#if (TARGET_IPHONE_SIMULATOR)
@interface MyHeading : CLHeading
-(CLLocationDirection) magneticHeading;
-(CLLocationDirection) trueHeading;
@end
@implementation MyHeading
-(CLLocationDirection) magneticHeading { return 90; }
-(CLLocationDirection) trueHeading { return 91; }
@end
@implementation CLLocationManager (TemporaryLocationFix)
- (void)locationFix {
CLLocation *location = [[CLLocation alloc] initWithLatitude:55.932 longitude:12.321];
[[self delegate] locationManager:self didUpdateToLocation:location fromLocation:nil];
id heading = [[MyHeading alloc] init];
[[self delegate] locationManager:self didUpdateHeading: heading];
}
-(void)startUpdatingHeading {
[self performSelector:@selector(locationFix) withObject:nil afterDelay:0.1];
}
- (void)startUpdatingLocation {
[self performSelector:@selector(locationFix) withObject:nil afterDelay:0.1];
}
@end
#endif
After iOS 5 simply include a GPX file in your project like this to have the location updated continuously Hillerød.gpx:
<?xml version="1.0"?>
<gpx version="1.1" creator="Xcode">
<wpt lat="55.93619760" lon="12.29131930"></wpt>
<wpt lat="55.93625770" lon="12.29108330"></wpt>
<wpt lat="55.93631780" lon="12.29078290"></wpt>
<wpt lat="55.93642600" lon="12.29041810"></wpt>
<wpt lat="55.93653420" lon="12.28998890"></wpt>
<wpt lat="55.93660630" lon="12.28966710"></wpt>
<wpt lat="55.93670240" lon="12.28936670"></wpt>
<wpt lat="55.93677450" lon="12.28921650"></wpt>
<wpt lat="55.93709900" lon="12.28945250"></wpt>
<wpt lat="55.93747160" lon="12.28949540"></wpt>
<wpt lat="55.93770000" lon="12.28966710"></wpt>
<wpt lat="55.93785620" lon="12.28977440"></wpt>
<wpt lat="55.93809660" lon="12.28988170"></wpt>
<wpt lat="55.93832490" lon="12.28994600"></wpt>
<wpt lat="55.93845710" lon="12.28996750"></wpt>
<wpt lat="55.93856530" lon="12.29007480"></wpt>
<wpt lat="55.93872150" lon="12.29013910"></wpt>
<wpt lat="55.93886570" lon="12.28975290"></wpt>
<wpt lat="55.93898590" lon="12.28955980"></wpt>
<wpt lat="55.93910610" lon="12.28919500"></wpt>
<wpt lat="55.93861330" lon="12.28883020"></wpt>
<wpt lat="55.93845710" lon="12.28868000"></wpt>
<wpt lat="55.93827680" lon="12.28850840"></wpt>
<wpt lat="55.93809660" lon="12.28842250"></wpt>
<wpt lat="55.93796440" lon="12.28831520"></wpt>
<wpt lat="55.93780810" lon="12.28810070"></wpt>
<wpt lat="55.93755570" lon="12.28790760"></wpt>
<wpt lat="55.93739950" lon="12.28775730"></wpt>
<wpt lat="55.93726730" lon="12.28767150"></wpt>
<wpt lat="55.93707500" lon="12.28760710"></wpt>
<wpt lat="55.93690670" lon="12.28734970"></wpt>
<wpt lat="55.93675050" lon="12.28726380"></wpt>
<wpt lat="55.93649810" lon="12.28713510"></wpt>
<wpt lat="55.93625770" lon="12.28687760"></wpt>
<wpt lat="55.93596930" lon="12.28679180"></wpt>
<wpt lat="55.93587310" lon="12.28719940"></wpt>
<wpt lat="55.93575290" lon="12.28752130"></wpt>
<wpt lat="55.93564480" lon="12.28797190"></wpt>
<wpt lat="55.93554860" lon="12.28833670"></wpt>
<wpt lat="55.93550050" lon="12.28868000"></wpt>
<wpt lat="55.93535630" lon="12.28900190"></wpt>
<wpt lat="55.93515200" lon="12.28936670"></wpt>
<wpt lat="55.93505580" lon="12.28958120"></wpt>
<wpt lat="55.93481550" lon="12.29001040"></wpt>
<wpt lat="55.93468320" lon="12.29033230"></wpt>
<wpt lat="55.93452700" lon="12.29063270"></wpt>
<wpt lat="55.93438280" lon="12.29095450"></wpt>
<wpt lat="55.93425050" lon="12.29121200"></wpt>
<wpt lat="55.93413040" lon="12.29140520"></wpt>
<wpt lat="55.93401020" lon="12.29168410"></wpt>
<wpt lat="55.93389000" lon="12.29189870"></wpt>
<wpt lat="55.93372170" lon="12.29239220"></wpt>
<wpt lat="55.93385390" lon="12.29258530"></wpt>
<wpt lat="55.93409430" lon="12.29295010"></wpt>
<wpt lat="55.93421450" lon="12.29320760"></wpt>
<wpt lat="55.93433470" lon="12.29333630"></wpt>
<wpt lat="55.93445490" lon="12.29350800"></wpt>
<wpt lat="55.93463520" lon="12.29374400"></wpt>
<wpt lat="55.93479140" lon="12.29410880"></wpt>
<wpt lat="55.93491160" lon="12.29419460"></wpt>
<wpt lat="55.93515200" lon="12.29458090"></wpt>
<wpt lat="55.93545250" lon="12.29494570"></wpt>
<wpt lat="55.93571690" lon="12.29505300"></wpt>
<wpt lat="55.93593320" lon="12.29513880"></wpt>
<wpt lat="55.93617360" lon="12.29522460"></wpt>
<wpt lat="55.93622170" lon="12.29537480"></wpt>
<wpt lat="55.93713510" lon="12.29505300"></wpt>
<wpt lat="55.93776000" lon="12.29378700"></wpt>
<wpt lat="55.93904600" lon="12.29531040"></wpt>
<wpt lat="55.94004350" lon="12.29552500"></wpt>
<wpt lat="55.94023570" lon="12.29561090"></wpt>
<wpt lat="55.94019970" lon="12.29591130"></wpt>
<wpt lat="55.94017560" lon="12.29629750"></wpt>
<wpt lat="55.94017560" lon="12.29670520"></wpt>
<wpt lat="55.94017560" lon="12.29713430"></wpt>
<wpt lat="55.94019970" lon="12.29754200"></wpt>
<wpt lat="55.94024780" lon="12.29816430"></wpt>
<wpt lat="55.94051210" lon="12.29842180"></wpt>
<wpt lat="55.94084860" lon="12.29820720"></wpt>
<wpt lat="55.94105290" lon="12.29799270"></wpt>
<wpt lat="55.94123320" lon="12.29777810"></wpt>
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</gpx>
I use GPSies.com to create the base file for the gpx data. A bit of cleanup is required though.
Activate by running the simulator and choosing your file
(source: castleandersen.dk)
How do you set the width of an HTML Helper TextBox in ASP.NET MVC?
For this you have to use HtmlAttributes, but there is a catch: HtmlAttributes and css class .
you can define it like this:
new { Attrubute="Value", AttributeTwo = IntegerValue, @class="className" };
and here is a more realistic example:
new { style="width:50px" };
new { style="width:50px", maxsize = 50 };
new {size=30, @class="required"}
and finally in:
MVC 1
<%= Html.TextBox("test", new { style="width:50px" }) %>
MVC 2
<%= Html.TextBox("test", null, new { style="width:50px" }) %>
MVC 3
@Html.TextBox("test", null, new { style="width:50px" })
How to amend older Git commit?
You can use git rebase --interactive, using the edit command on the commit you want to amend.
How can I add an element after another element?
First of all, input element shouldn't have a closing tag (from http://www.w3.org/TR/html401/interact/forms.html#edef-INPUT : End tag: forbidden
).
Second thing, you need the after(), not append() function.
Convert varchar dd/mm/yyyy to dd/mm/yyyy datetime
I think you are after this:
CONVERT(datetime, date_as_string, 103)
Notice, that datetime hasn't any format. You think about its presentation. To get the data of datetime in an appropriate format you can use
CONVERT(varchar, date_as_datetime, 103)
git remove merge commit from history
Do git rebase -i <sha before the branches diverged> this will allow you to remove the merge commit and the log will be one single line as you wanted. You can also delete any commits that you do not want any more. The reason that your rebase wasn't working was that you weren't going back far enough.
WARNING: You are rewriting history doing this. Doing this with changes that have been pushed to a remote repo will cause issues. I recommend only doing this with commits that are local.
Batch script to delete files
You need to escape the % with another...
del "D:\TEST\TEST 100%%\Archive*.TXT"
Can anyone recommend a simple Java web-app framework?
Oracle ADF http://www.oracle.com/technology/products/jdev/index.html
How to change TextBox's Background color?
in web application in .cs page
txtbox.Style.Add("background-color","black");
in css specify it by using backcolor property
How to check if an element of a list is a list (in Python)?
Use isinstance:
if isinstance(e, list):
If you want to check that an object is a list or a tuple, pass several classes to isinstance:
if isinstance(e, (list, tuple)):
Testing two JSON objects for equality ignoring child order in Java
Do any of the major JSON libraries support this? The org.json library simply does a reference comparison.
But org.json does support this! Use similar() instead of equals().
Appending to list in Python dictionary
dates_dict[key] = dates_dict.get(key, []).append(date) sets dates_dict[key] to None as list.append returns None.
In [5]: l = [1,2,3]
In [6]: var = l.append(3)
In [7]: print var
None
You should use collections.defaultdict
import collections
dates_dict = collections.defaultdict(list)
Setting maxlength of textbox with JavaScript or jQuery
$('#yourTextBoxId').live('change keyup paste', function(){
if ($('#yourTextBoxId').val().length > 11) {
$('#yourTextBoxId').val($('#yourTextBoxId').val().substr(0,10));
}
});
I Used this along with vars and selectors caching for performance and that did the trick ..
How to run Nginx within a Docker container without halting?
Just FYI, as of today (22 October 2019) official Nginx docker images all have line:
CMD ["nginx", "-g", "daemon off;"]
.htaccess rewrite to redirect root URL to subdirectory
Two ways out of possible solutions to achieve this are:
1. Create a .htaccess file in root folder as under (just replace example.com and my_dir with your corresponding values):
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www.)?example.com$
RewriteCond %{REQUEST_URI} !^/my_dir/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /my_dir/$1
RewriteCond %{HTTP_HOST} ^(www.)?example.com$
RewriteRule ^(/)?$ my_dir/index.php [L]
</IfModule>
Use RedirectMatch to only redirect the root URL “/” to another folder or URL,
RedirectMatch ^/$ http://www.example.com/my_dir
Where is the default log location for SharePoint/MOSS?
By default they are stored here:
%commonprogramfiles%/Microsoft Shared/web server extensions/12/Logs
Using %commonprogramfiles% make it works in non-english systems.
Why does "pip install" inside Python raise a SyntaxError?
As @sinoroc suggested correct way of installing a package via pip is using separate process since pip may cause closing a thread or may require a restart of interpreter to load new installed package so this is the right way of using the API: subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'SomeProject']) but since Python allows to access internal API and you know what you're using the API for you may want to use internal API anyway eg. if you're building own GUI package manager with alternative resourcess like https://www.lfd.uci.edu/~gohlke/pythonlibs/
Following soulution is OUT OF DATE, instead of downvoting suggest updates. see https://github.com/pypa/pip/issues/7498 for reference.
UPDATE: Since pip version 10.x there is no more
get_installed_distributions() or main method under import pip instead use import pip._internal as pip.
UPDATE ca. v.18 get_installed_distributions() has been removed. Instead you may use generator freeze like this:
from pip._internal.operations.freeze import freeze
print([package for package in freeze()])
# eg output ['pip==19.0.3']
If you want to use pip inside the Python interpreter, try this:
import pip
package_names=['selenium', 'requests'] #packages to install
pip.main(['install'] + package_names + ['--upgrade'])
# --upgrade to install or update existing packages
If you need to update every installed package, use following:
import pip
for i in pip.get_installed_distributions():
pip.main(['install', i.key, '--upgrade'])
If you want to stop installing other packages if any installation fails, use it in one single pip.main([]) call:
import pip
package_names = [i.key for i in pip.get_installed_distributions()]
pip.main(['install'] + package_names + ['--upgrade'])
Note: When you install from list in file with -r / --requirement parameter you do NOT need open() function.
pip.main(['install', '-r', 'filename'])
Warning: Some parameters as simple --help may cause python interpreter to stop.
Curiosity: By using pip.exe you actually use python interpreter and pip module anyway. If you unpack pip.exe or pip3.exe regardless it's python 2.x or 3.x, inside is the SAME single file __main__.py:
# -*- coding: utf-8 -*-
import re
import sys
from pip import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())
Converting .NET DateTime to JSON
What is returned is milliseconds since epoch. You could do:
var d = new Date();
d.setTime(1245398693390);
document.write(d);
On how to format the date exactly as you want, see full Date reference at http://www.w3schools.com/jsref/jsref_obj_date.asp
You could strip the non-digits by either parsing the integer (as suggested here):
var date = new Date(parseInt(jsonDate.substr(6)));
Or applying the following regular expression (from Tominator in the comments):
var jsonDate = jqueryCall(); // returns "/Date(1245398693390)/";
var re = /-?\d+/;
var m = re.exec(jsonDate);
var d = new Date(parseInt(m[0]));
How to remove and clear all localStorage data
Something like this should do:
function cleanLocalStorage() {
for(key in localStorage) {
delete localStorage[key];
}
}
Be careful about using this, though, as the user may have other data stored in localStorage and would probably be pretty ticked if you deleted that. I'd recommend either a) not storing the user's data in localStorage or b) storing the user's account stuff in a single variable, and then clearing that instead of deleting all the keys in localStorage.
Edit: As Lyn pointed out, you'll be good with localStorage.clear(). My previous points still stand, however.
Securely storing passwords for use in python script
I typically have a secrets.py that is stored separately from my other python scripts and is not under version control. Then whenever required, you can do from secrets import <required_pwd_var>. This way you can rely on the operating systems in-built file security system without re-inventing your own.
Using Base64 encoding/decoding is also another way to obfuscate the password though not completely secure
More here - Hiding a password in a python script (insecure obfuscation only)
What exactly does big ? notation represent?
It means that the algorithm is both big-O and big-Omega in the given function.
For example, if it is ?(n), then there is some constant k, such that your function (run-time, whatever), is larger than n*k for sufficiently large n, and some other constant K such that your function is smaller than n*K for sufficiently large n.
In other words, for sufficiently large n, it is sandwiched between two linear functions :
For k < K and n sufficiently large, n*k < f(n) < n*K
How to get bitmap from a url in android?
This is a simple one line way to do it:
try {
URL url = new URL("http://....");
Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch(IOException e) {
System.out.println(e);
}
Display Records From MySQL Database using JTable in Java
Below is a class which will accomplish the very basics of what you want to do when reading data from a MySQL database into a JTable in Java.
import java.awt.*;
import java.sql.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableFromMySqlDatabase extends JFrame
{
public TableFromMySqlDatabase()
{
ArrayList columnNames = new ArrayList();
ArrayList data = new ArrayList();
// Connect to an MySQL Database, run query, get result set
String url = "jdbc:mysql://localhost:3306/yourdb";
String userid = "root";
String password = "sesame";
String sql = "SELECT * FROM animals";
// Java SE 7 has try-with-resources
// This will ensure that the sql objects are closed when the program
// is finished with them
try (Connection connection = DriverManager.getConnection( url, userid, password );
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery( sql ))
{
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++)
{
columnNames.add( md.getColumnName(i) );
}
// Get row data
while (rs.next())
{
ArrayList row = new ArrayList(columns);
for (int i = 1; i <= columns; i++)
{
row.add( rs.getObject(i) );
}
data.add( row );
}
}
catch (SQLException e)
{
System.out.println( e.getMessage() );
}
// Create Vectors and copy over elements from ArrayLists to them
// Vector is deprecated but I am using them in this example to keep
// things simple - the best practice would be to create a custom defined
// class which inherits from the AbstractTableModel class
Vector columnNamesVector = new Vector();
Vector dataVector = new Vector();
for (int i = 0; i < data.size(); i++)
{
ArrayList subArray = (ArrayList)data.get(i);
Vector subVector = new Vector();
for (int j = 0; j < subArray.size(); j++)
{
subVector.add(subArray.get(j));
}
dataVector.add(subVector);
}
for (int i = 0; i < columnNames.size(); i++ )
columnNamesVector.add(columnNames.get(i));
// Create table with database data
JTable table = new JTable(dataVector, columnNamesVector)
{
public Class getColumnClass(int column)
{
for (int row = 0; row < getRowCount(); row++)
{
Object o = getValueAt(row, column);
if (o != null)
{
return o.getClass();
}
}
return Object.class;
}
};
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
JPanel buttonPanel = new JPanel();
getContentPane().add( buttonPanel, BorderLayout.SOUTH );
}
public static void main(String[] args)
{
TableFromMySqlDatabase frame = new TableFromMySqlDatabase();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}
In the NetBeans IDE which you are using - you will need to add the MySQL JDBC Driver in Project Properties as I display here:
Otherwise the code will throw an SQLException stating that the driver cannot be found.
Now in my example, yourdb is the name of the database and animals is the name of the table that I am performing a query against.
Here is what will be output:
Parting note:
You stated that you were a novice and needed some help understanding some of the basic classes and concepts of Java. I will list a few here, but remember you can always browse the docs on Oracle's site.
Android: how to refresh ListView contents?
I'm doing the same thing using invalidateViews() and that works for me. If you want it to invalidate immediately you could try calling postInvalidate after calling invalidateViews.
Code for a simple JavaScript countdown timer?
Expanding upon the accepted answer, your machine going to sleep, etc. may delay the timer from working. You can get a true time, at the cost of a little processing. This will give a true time left.
<span id="timer"></span>
<script>
var now = new Date();
var timeup = now.setSeconds(now.getSeconds() + 30);
//var timeup = now.setHours(now.getHours() + 1);
var counter = setInterval(timer, 1000);
function timer() {
now = new Date();
count = Math.round((timeup - now)/1000);
if (now > timeup) {
window.location = "/logout"; //or somethin'
clearInterval(counter);
return;
}
var seconds = Math.floor((count%60));
var minutes = Math.floor((count/60) % 60);
document.getElementById("timer").innerHTML = minutes + ":" + seconds;
}
</script>
How can I detect if this dictionary key exists in C#?
Here is a little something I cooked up today. Seems to work for me. Basically you override the Add method in your base namespace to do a check and then call the base's Add method in order to actually add it. Hope this works for you
using System;
using System.Collections.Generic;
using System.Collections;
namespace Main
{
internal partial class Dictionary<TKey, TValue> : System.Collections.Generic.Dictionary<TKey, TValue>
{
internal new virtual void Add(TKey key, TValue value)
{
if (!base.ContainsKey(key))
{
base.Add(key, value);
}
}
}
internal partial class List<T> : System.Collections.Generic.List<T>
{
internal new virtual void Add(T item)
{
if (!base.Contains(item))
{
base.Add(item);
}
}
}
public class Program
{
public static void Main()
{
Dictionary<int, string> dic = new Dictionary<int, string>();
dic.Add(1,"b");
dic.Add(1,"a");
dic.Add(2,"c");
dic.Add(1, "b");
dic.Add(1, "a");
dic.Add(2, "c");
string val = "";
dic.TryGetValue(1, out val);
Console.WriteLine(val);
Console.WriteLine(dic.Count.ToString());
List<string> lst = new List<string>();
lst.Add("b");
lst.Add("a");
lst.Add("c");
lst.Add("b");
lst.Add("a");
lst.Add("c");
Console.WriteLine(lst[2]);
Console.WriteLine(lst.Count.ToString());
}
}
}
Lodash .clone and .cloneDeep behaviors
Thanks to Gruff Bunny and Louis' comments, I found the source of the issue.
As I use Backbone.js too, I loaded a special build of Lodash compatible with Backbone and Underscore that disables some features. In this example:
var clone = _.clone(data, true);
data[1].values.d = 'x';
- with the Normal build:
_.isEqual(data, clone) === false - with the Underscore build:
_.isEqual(data, clone) === true
I just replaced the Underscore build with the Normal build in my Backbone application and the application is still working. So I can now use the Lodash .clone with the expected behaviour.
Edit 2018: the Underscore build doesn't seem to exist anymore. If you are reading this in 2018, you could be interested by this documentation (Backbone and Lodash).
jQuery UI themes and HTML tables
I've got a one liner to make HTML Tables look BootStrapped:
<table class="table table-striped table-bordered table-hover">
The theme suits other controls and it supports alternate row highlighting.
Javascript Iframe innerHTML
Conroy's answer was right. In the case you need only stuff from body tag, just use:
$('#my_iframe').contents().find('body').html();
How to construct a WebSocket URI relative to the page URI?
Here is my version which adds the tcp port in case it's not 80 or 443:
function url(s) {
var l = window.location;
return ((l.protocol === "https:") ? "wss://" : "ws://") + l.hostname + (((l.port != 80) && (l.port != 443)) ? ":" + l.port : "") + l.pathname + s;
}
Edit 1: Improved version as by suggestion of @kanaka :
function url(s) {
var l = window.location;
return ((l.protocol === "https:") ? "wss://" : "ws://") + l.host + l.pathname + s;
}
Edit 2: Nowadays I create the WebSocket this:
var s = new WebSocket(((window.location.protocol === "https:") ? "wss://" : "ws://") + window.location.host + "/ws");
Load local HTML file in a C# WebBrowser
Note that the file:/// scheme does not work on the compact framework, at least it doesn't with 5.0.
You will need to use the following:
string appDir = Path.GetDirectoryName(
Assembly.GetExecutingAssembly().GetName().CodeBase);
webBrowser1.Url = new Uri(Path.Combine(appDir, @"Documentation\index.html"));
DBCC SHRINKFILE on log file not reducing size even after BACKUP LOG TO DISK
I tried many ways but this works.
Sample code is availalbe in DBCC SHRINKFILE
USE DBName;
GO
-- Truncate the log by changing the database recovery model to SIMPLE.
ALTER DATABASE DBName
SET RECOVERY SIMPLE;
GO
-- Shrink the truncated log file to 1 MB.
DBCC SHRINKFILE (DBName_log, 1); --File name SELECT * FROM sys.database_files; query to get the file name
GO
-- Reset the database recovery model.
ALTER DATABASE DBName
SET RECOVERY FULL;
GO
Interesting 'takes exactly 1 argument (2 given)' Python error
If a non-static method is member of a class, you have to define it like that:
def Method(self, atributes..)
So, I suppose your 'e' is instance of some class with implemented method that tries to execute and has too much arguments.
What is the difference between logical data model and conceptual data model?
logical data model
A logical data model describes the data in as much detail as possible, without regard to how they will be physical implemented in the database. Features of a logical data model include: · Includes all entities and relationships among them. · All attributes for each entity are specified. · The primary key for each entity is specified. · Foreign keys (keys identifying the relationship between different entities) are specified. · Normalization occurs at this level. conceptual data model
A conceptual data model identifies the highest-level relationships between the different entities. Features of conceptual data model include: · Includes the important entities and the relationships among them. · No attribute is specified. · No primary key is specified.
How do I edit an incorrect commit message in git ( that I've pushed )?
The message from Linus Torvalds may answer your question:
Modify/edit old commit messages
Short answer: you can not (if pushed).
extract (Linus refers to BitKeeper as BK):
Side note, just out of historical interest: in BK you could.
And if you're used to it (like I was) it was really quite practical. I would apply a patch-bomb from Andrew, notice something was wrong, and just edit it before pushing it out.
I could have done the same with git. It would have been easy enough to make just the commit message not be part of the name, and still guarantee that the history was untouched, and allow the "fix up comments later" thing.
But I didn't.
Part of it is purely "internal consistency". Git is simply a cleaner system thanks to everything being SHA1-protected, and all objects being treated the same, regardless of object type. Yeah, there are four different kinds of objects, and they are all really different, and they can't be used in the same way, but at the same time, even if their encoding might be different on disk, conceptually they all work exactly the same.
But internal consistency isn't really an excuse for being inflexible, and clearly it would be very flexible if we could just fix up mistakes after they happen. So that's not a really strong argument.
The real reason git doesn't allow you to change the commit message ends up being very simple: that way, you can trust the messages. If you allowed people to change them afterwards, the messages are inherently not very trustworthy.
To be complete, you could rewrite your local commit history in order to reflect what you want, as suggested by sykora (with some rebase and reset --hard, gasp!)
However, once you publish your revised history again (with a git push origin +master:master, the + sign forcing the push to occur, even if it doesn't result in a "fast-forward" commit)... you might get into some trouble.
Extract from this other SO question:
I actually once pushed with --force to git.git repository and got scolded by Linus BIG TIME. It will create a lot of problems for other people. A simple answer is "don't do it".
How can I print to the same line?
In Linux, there is different escape sequences for control terminal. For example, there is special escape sequence for erase whole line: \33[2K and for move cursor to previous line: \33[1A. So all you need is to print this every time you need to refresh the line. Here is the code which prints Line 1 (second variant):
System.out.println("Line 1 (first variant)");
System.out.print("\33[1A\33[2K");
System.out.println("Line 1 (second variant)");
There are codes for cursor navigation, clearing screen and so on.
I think there are some libraries which helps with it (ncurses?).
Show ProgressDialog Android
I am using the following code in one of my current projects where i download data from the internet. It is all inside my activity class.
// ---------------------------- START DownloadFileAsync // -----------------------//
class DownloadFileAsync extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// DIALOG_DOWNLOAD_PROGRESS is defined as 0 at start of class
showDialog(DIALOG_DOWNLOAD_PROGRESS);
}
@Override
protected String doInBackground(String... urls) {
try {
String xmlUrl = urls[0];
URL u = new URL(xmlUrl);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
int lengthOfFile = c.getContentLength();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
long total = 0;
while ((len1 = in.read(buffer)) > 0) {
total += len1; // total = total + len1
publishProgress("" + (int) ((total * 100) / lengthOfFile));
xmlContent += buffer;
}
} catch (Exception e) {
Log.d("Downloader", e.getMessage());
}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d("ANDRO_ASYNC", progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
@Override
protected void onPostExecute(String unused) {
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
}
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOWNLOAD_PROGRESS:
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Retrieving latest announcements...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
mProgressDialog.show();
return mProgressDialog;
default:
return null;
}
}
How do you write to a folder on an SD card in Android?
In order to download a file to Download or Music Folder In SDCard
File downlodDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);// or DIRECTORY_PICTURES
And dont forget to add these permission in manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
As pointed out by other answers, in python they return floats probably because of historical reasons to prevent overflow problems. However, they return integers in python 3.
>>> import math
>>> type(math.floor(3.1))
<class 'int'>
>>> type(math.ceil(3.1))
<class 'int'>
You can find more information in PEP 3141.
Search for executable files using find command
It is SO ridiculous that this is not super-easy... let alone next to impossible. Hands up, I defer to Apple/Spotlight...
mdfind 'kMDItemContentType=public.unix-executable'
At least it works!
How do I count cells that are between two numbers in Excel?
Example-
For cells containing the values between 21-31, the formula is:
=COUNTIF(M$7:M$83,">21")-COUNTIF(M$7:M$83,">31")
CSS to prevent child element from inheriting parent styles
CSS rules are inherited by default - hence the "cascading" name. To get what you want you need to use !important:
form div
{
font-size: 12px;
font-weight: bold;
}
div.content
{
// any rule you want here, followed by !important
}
Foreach loop in C++ equivalent of C#
If you have an array you can simply use a for loop. (I'm sorry, but I'm not going to type out the code for a for loop for you.)
ALTER table - adding AUTOINCREMENT in MySQL
The syntax:
ALTER TABLE `table1` CHANGE `itemId` `itemId` INT( 11 ) NOT NULL AUTO_INCREMENT
But the table needs a defined key (ex primary key on itemId).
Simple way to compare 2 ArrayLists
As far as I understand it correctly, I think it's easiest to work with 4 lists: - Your sourceList - Your destinationList - A removedItemsList - A newlyAddedItemsList
Passing multiple values to a single PowerShell script parameter
One way to do it would be like this:
param(
[Parameter(Position=0)][String]$Vlan,
[Parameter(ValueFromRemainingArguments=$true)][String[]]$Hosts
) ...
This would allow multiple hosts to be entered with spaces.
beyond top level package error in relative import
This is very tricky in Python.
I'll first comment on why you're having that problem and then I will mention two possible solutions.
- What's going on?
You must take this paragraph from the Python documentation into consideration:
Note that relative imports are based on the name of the current module. Since the name of the main module is always "main", modules intended for use as the main module of a Python application must always use absolute imports.
And also the following from PEP 328:
Relative imports use a module's name attribute to determine that module's position in the package hierarchy. If the module's name does not contain any package information (e.g. it is set to 'main') then relative imports are resolved as if the module were a top level module, regardless of where the module is actually located on the file system.
Relative imports work from the filename (__name__ attribute), which can take two values:
- It's the filename, preceded by the folder strucutre, separated by dots.
For eg:
package.test_A.testHere Python knows the parent directories: beforetestcomestest_Aand thenpackage. So you can use the dot notation for relative import.
# package.test_A/test.py
from ..A import foo
You can then have like a root file in the root directory which calls test.py:
# root.py
from package.test_A import test
- When you run the module (
test.py) directly, it becomes the entry point to the program , so__name__==__main__. The filename has no indication of the directory structure, so Python doesn't know how to go up in the directory. For Python,test.pybecomes the top-level script, there is nothing above it. That's why you cannot use relative import.
- Possible Solutions
A) One way to solve this is to have a root file (in the root directory) which calls the modules/packages, like this:
root.pyimportstest.py. (entry point,__name__ == __main__).test.py(relative) importsfoo.py.foo.pysays the module has been imported.
The output is:
package.A.foo has been imported
Module's name is: package.test_A.test
B) If you want to execute the code as a module and not as a top-level script, you can try this from the command line:
python -m package.test_A.test
Any suggestions are welcomed.
You should also check: Relative imports for the billionth time , specially BrenBarn's answer.
wamp server mysql user id and password
Previous answers might not work for later mysql versions. Try these steps if previous answers did not work for you:
Click on the wamp icon &rarr: mysql → mysql console
write following commands, one by one
use mysql; update user set authentication_string=password('your_password') where user='root'; FLUSH PRIVILEGES; quit
How do I format date in jQuery datetimepicker?
You can use the format option, as described in the documentation
$("#timePicker").datetimepicker({
format: 'Y-m-d H:i'
});
Creating composite primary key in SQL Server
it simple, select columns want to insert primary key and click on Key icon on header and save table
happy coding..,
Table header to stay fixed at the top when user scrolls it out of view with jQuery
This is by far the best solution I've found for having a fixed table header.
UPDATE 5/11: Fixed horizontal scrolling bug as pointed out by Kerry Johnson
Codepen: https://codepen.io/josephting/pen/demELL
;(function($) {_x000D_
$.fn.fixMe = function() {_x000D_
return this.each(function() {_x000D_
var $this = $(this),_x000D_
$t_fixed;_x000D_
function init() {_x000D_
$this.wrap('<div class="container" />');_x000D_
$t_fixed = $this.clone();_x000D_
$t_fixed.find("tbody").remove().end().addClass("fixed").insertBefore($this);_x000D_
resizeFixed();_x000D_
}_x000D_
function resizeFixed() {_x000D_
$t_fixed.width($this.outerWidth());_x000D_
$t_fixed.find("th").each(function(index) {_x000D_
$(this).css("width",$this.find("th").eq(index).outerWidth()+"px");_x000D_
});_x000D_
}_x000D_
function scrollFixed() {_x000D_
var offsetY = $(this).scrollTop(),_x000D_
offsetX = $(this).scrollLeft(),_x000D_
tableOffsetTop = $this.offset().top,_x000D_
tableOffsetBottom = tableOffsetTop + $this.height() - $this.find("thead").height(),_x000D_
tableOffsetLeft = $this.offset().left;_x000D_
if(offsetY < tableOffsetTop || offsetY > tableOffsetBottom)_x000D_
$t_fixed.hide();_x000D_
else if(offsetY >= tableOffsetTop && offsetY <= tableOffsetBottom && $t_fixed.is(":hidden"))_x000D_
$t_fixed.show();_x000D_
$t_fixed.css("left", tableOffsetLeft - offsetX + "px");_x000D_
}_x000D_
$(window).resize(resizeFixed);_x000D_
$(window).scroll(scrollFixed);_x000D_
init();_x000D_
});_x000D_
};_x000D_
})(jQuery);_x000D_
_x000D_
$(document).ready(function(){_x000D_
$("table").fixMe();_x000D_
$(".up").click(function() {_x000D_
$('html, body').animate({_x000D_
scrollTop: 0_x000D_
}, 2000);_x000D_
});_x000D_
});body{_x000D_
font:1.2em normal Arial,sans-serif;_x000D_
color:#34495E;_x000D_
}_x000D_
_x000D_
h1{_x000D_
text-align:center;_x000D_
text-transform:uppercase;_x000D_
letter-spacing:-2px;_x000D_
font-size:2.5em;_x000D_
margin:20px 0;_x000D_
}_x000D_
_x000D_
.container{_x000D_
width:90%;_x000D_
margin:auto;_x000D_
}_x000D_
_x000D_
table{_x000D_
border-collapse:collapse;_x000D_
width:100%;_x000D_
}_x000D_
_x000D_
.blue{_x000D_
border:2px solid #1ABC9C;_x000D_
}_x000D_
_x000D_
.blue thead{_x000D_
background:#1ABC9C;_x000D_
}_x000D_
_x000D_
.purple{_x000D_
border:2px solid #9B59B6;_x000D_
}_x000D_
_x000D_
.purple thead{_x000D_
background:#9B59B6;_x000D_
}_x000D_
_x000D_
thead{_x000D_
color:white;_x000D_
}_x000D_
_x000D_
th,td{_x000D_
text-align:center;_x000D_
padding:5px 0;_x000D_
}_x000D_
_x000D_
tbody tr:nth-child(even){_x000D_
background:#ECF0F1;_x000D_
}_x000D_
_x000D_
tbody tr:hover{_x000D_
background:#BDC3C7;_x000D_
color:#FFFFFF;_x000D_
}_x000D_
_x000D_
.fixed{_x000D_
top:0;_x000D_
position:fixed;_x000D_
width:auto;_x000D_
display:none;_x000D_
border:none;_x000D_
}_x000D_
_x000D_
.scrollMore{_x000D_
margin-top:600px;_x000D_
}_x000D_
_x000D_
.up{_x000D_
cursor:pointer;_x000D_
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<h1>↓ SCROLL ↓</h1>_x000D_
<table class="blue">_x000D_
<thead>_x000D_
<tr>_x000D_
<th>Colonne 1</th>_x000D_
<th>Colonne 2</th>_x000D_
<th>Colonne 3</th>_x000D_
</tr>_x000D_
</thead>_x000D_
<tbody>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>MaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMaisMais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
</tbody>_x000D_
</table>_x000D_
_x000D_
<h1 class="scrollMore">↓ SCROLL MORE ↓</h1>_x000D_
<table class="purple">_x000D_
<thead>_x000D_
<tr>_x000D_
<th>Colonne 1</th>_x000D_
<th>Colonne 2</th>_x000D_
<th>Colonne 3</th>_x000D_
</tr>_x000D_
</thead>_x000D_
<tbody>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>Non</td>_x000D_
<td>Mais</td>_x000D_
<td>Allo !</td>_x000D_
</tr>_x000D_
</tbody>_x000D_
</table>_x000D_
<h1 class="up scrollMore">↑ UP ↑</h1>Webclient / HttpWebRequest with Basic Authentication returns 404 not found for valid URL
This part of code worked fine for me:
WebRequest request = WebRequest.Create(url);
request.Method = WebRequestMethods.Http.Get;
NetworkCredential networkCredential = new NetworkCredential(logon, password); // logon in format "domain\username"
CredentialCache myCredentialCache = new CredentialCache {{new Uri(url), "Basic", networkCredential}};
request.PreAuthenticate = true;
request.Credentials = myCredentialCache;
using (WebResponse response = request.GetResponse())
{
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
using (Stream dataStream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(dataStream))
{
string responseFromServer = reader.ReadToEnd();
Console.WriteLine(responseFromServer);
}
}
}
How to store .pdf files into MySQL as BLOBs using PHP?
In regards to Gordon M's answer above, the 1st and 2nd parameter in mysqli_real_escape_string () call should be swapped for the newer php versions,
according to: http://php.net/manual/en/mysqli.real-escape-string.php
Set an empty DateTime variable
The .addwithvalue needs dbnull. You could do something like this:
DateTime? someDate = null;
//...
if (someDate == null)
myCommand.Parameters.AddWithValue("@SurgeryDate", DBnull.value);
or use a method extension...
public static class Extensions
{
public static SqlParameter AddWithNullValue(this SqlParameterCollection collection, string parameterName, object value)
{
if (value == null)
return collection.AddWithValue(parameterName, DBNull.Value);
else
return collection.AddWithValue(parameterName, value);
}
}
How to create an array containing 1...N
Using new Array methods and => function syntax from ES6 standard (only Firefox at the time of writing).
By filling holes with undefined:
Array(N).fill().map((_, i) => i + 1);
Array.from turns "holes" into undefined so Array.map works as expected:
Array.from(Array(5)).map((_, i) => i + 1)
I ran into a merge conflict. How can I abort the merge?
In this particular use case, you don't really want to abort the merge, just resolve the conflict in a particular way.
There is no particular need to reset and perform a merge with a different strategy, either. The conflicts have been correctly highlighted by git and the requirement to accept the other sides changes is only for this one file.
For an unmerged file in a conflict git makes available the common base, local and remote versions of the file in the index. (This is where they are read from for use in a 3-way diff tool by git mergetool.) You can use git show to view them.
# common base:
git show :1:_widget.html.erb
# 'ours'
git show :2:_widget.html.erb
# 'theirs'
git show :3:_widget.html.erb
The simplest way to resolve the conflict to use the remote version verbatim is:
git show :3:_widget.html.erb >_widget.html.erb
git add _widget.html.erb
Or, with git >= 1.6.1:
git checkout --theirs _widget.html.erb
Why do table names in SQL Server start with "dbo"?
It's new to SQL 2005 and offers a simplified way to group objects, especially for the purpose of securing the objects in that "group".
The following link offers a more in depth explanation as to what it is, why we would use it:
Understanding the Difference between Owners and Schemas in SQL Server
Get fragment (value after hash '#') from a URL in php
You can do it by a combination of javascript and php:
<div id="cont"></div>
And by the other side;
<script>
var h = window.location.hash;
var h1 = (win.substr(1));//string with no #
var q1 = '<input type="text" id="hash" name="hash" value="'+h1+'">';
setInterval(function(){
if(win1!="")
{
document.querySelector('#cont').innerHTML = q1;
} else alert("Something went wrong")
},1000);
</script>
Then, on form submit you can retrieve the value via $_POST['hash'] (set the form)
Plot two histograms on single chart with matplotlib
There is one caveat when you want to plot the histogram from a 2-d numpy array. You need to swap the 2 axes.
import numpy as np
import matplotlib.pyplot as plt
data = np.random.normal(size=(2, 300))
# swapped_data.shape == (300, 2)
swapped_data = np.swapaxes(x, axis1=0, axis2=1)
plt.hist(swapped_data, bins=30, label=['x', 'y'])
plt.legend()
plt.show()
How to set default value to the input[type="date"]
JS Code:
function TodayDate(){
let data= new Date();
return data.getFullYear().toString()+'-' + (data.getMonth()+1).toString()+'-' + data.getDate().toString()
}
document.getElementById('today').innerHTML = '<input type="date" name="Data" value="'+TodayDate()+'" ><br>';
Html Code:
<div id="today" > </div>
A little bit rough but it works!
reStructuredText tool support
Salvaging (and extending) the list from an old version of the Wikipedia page:
Documentation
Implementations
Although the reference implementation of reStructuredText is written in Python, there are reStructuredText parsers in other languages too.
Python - Docutils
The main distribution of reStructuredText is the Python Docutils package. It contains several conversion tools:
- rst2html - from reStructuredText to HTML
- rst2xml - from reStructuredText to XML
- rst2latex - from reStructuredText to LaTeX
- rst2odt - from reStructuredText to ODF Text (word processor) document.
- rst2s5 - from reStructuredText to S5, a Simple Standards-based Slide Show System
- rst2man - from reStructuredText to Man page
Haskell - Pandoc
Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. It can read Markdown and (subsets of) reStructuredText, HTML, and LaTeX, and it can write Markdown, reStructuredText, HTML, LaTeX, ConTeXt, PDF, RTF, DocBook XML, OpenDocument XML, ODT, GNU Texinfo, MediaWiki markup, groff man pages, and S5 HTML slide shows.
There is an Pandoc online tool (POT) to try this library. Unfortunately, compared to the reStructuredText online renderer (ROR),
- POT truncates input rather more shortly. The POT user must render input in chunks that could be rendered whole by the ROR.
- POT output lacks the helpful error messages displayed by the ROR (and generated by
docutils)
Java - JRst
JRst is a Java reStructuredText parser. It can currently output HTML, XHTML, DocBook xdoc and PDF, BUT seems to have serious problems: neither PDF or (X)HTML generation works using the current full download, result pages in (X)HTML are empty and PDF generation fails on IO problems with XSL files (not bundled??). Note that the original JRst has been removed from the website; a fork is found on GitHub.
Scala - Laika
Laika is a new library for transforming markup languages to other output formats. Currently it supports input from Markdown and reStructuredText and produce HTML output. The library is written in Scala but should be also usable from Java.
Perl
- Text::Restructured - Perl implementation of reStructuredText parser
- Dotiac::DTL::Addon::markup - Filters to work with common markup languages - support reStructuredText
- Pod::POM::View::Restructured - View for Pod::POM that outputs reStructuredText
PHP
- Gregwar/RST - A mature PHP5.3 parser with tests
- php-restructuredtext - A simple, incomplete (but functional) implementation
C#/.NET
- reStructuredText for ANTLR - A C# based parser with tests (in progress). It also provides the language server behind reStructuredText extension for Visual Studio Code.
Nim/C
The Nim compiler features the commands rst2htmland rst2tex which transform reStructuredText files to HTML and TeX files. The standard library provides the following modules (used by the compiler) to handle reStructuredText files programmatically:
- rst - implements a reStructuredText parser
- rstast - implements an AST for the reStructuredText parser
- rstgen - implements a generator of HTML/Latex from reStructuredText
Other 3rd party converters
Most (but not all) of these tools are based on Docutils (see above) and provide conversion to or from formats that might not be supported by the main distribution.
From reStructuredText
- restview - This
pip-installable python package requiresdocutils, which does the actual rendering.restview's major ease-of-use feature is that, when you save changes to your document(s), it automagically re-renders and re-displays them.restview- starts a small web server
- calls
docutilsto render your document(s) to HTML - calls your device's browser to display the output HTML.
- rst2pdf - from reStructuredText to PDF
- rst2odp - from reStructuredText to ODF Presentation
- rst2beamer - from reStructuredText to LaTeX beamer Presentation class
- Wikir - from reStructuredText to a Google (and possibly other) Wiki formats
- rst2qhc - Convert a collection of reStructuredText files into a Qt (toolkit) Help file and (optional) a Qt Help Project file
To reStructuredText
- xml2rst is an XSLT script to convert Docutils internal XML representation (back) to reStructuredText
- Pandoc (see above) can also convert from Markdown, HTML and LaTeX to reStructuredText
- db2rst is a simple and limited DocBook to reStructuredText translator
- pod2rst - convert .pod files to reStructuredText files
Extensions
Some projects use reStructuredText as a baseline to build on, or provide extra functionality extending the utility of the reStructuredText tools.
Sphinx
The Sphinx documentation generator translates a set of reStructuredText source files into various output formats, automatically producing cross-references, indices etc.
rest2web
rest2web is a simple tool that lets you build your website from a single template (or as many as you want), and keep the contents in reStructuredText.
Pygments
Pygments is a generic syntax highlighter for general use in all kinds of software such as forum systems, Wikis or other applications that need to prettify source code. See Using Pygments in reStructuredText documents.
Free Editors
While any plain text editor is suitable to write reStructuredText documents, some editors have better support than others.
Emacs
The Emacs support via rst-mode comes as part of the Docutils package under /docutils/tools/editors/emacs/rst.el
Vim
The vim-common package for that comes with most GNU/Linux distributions has reStructuredText syntax highlight and indentation support of reStructuredText out of the box:
- reStructuredText syntax highlighting mode for vim
- VST (Vim reStructured Text) is a plugin for Vim7 with folding for reStructuredText
- Riv.vim - fresh vim plugin for authoring rst and Sphinx doc
- Previm: Vim plugin for live previewing of reStructuredText and other mark up documents
Jed
There is a rst mode for the Jed programmers editor.
gedit
gedit, the official text editor of the GNOME desktop environment. There is a gedit reStructuredText plugin.
Geany
Geany, a small and lightweight Integrated Development Environment include support for reStructuredText from version 0.12 (October 10, 2007).
Leo
Leo, an outlining editor for programmers, supports reStructuredText via rst-plugin or via "@auto-rst" nodes (it's not well-documented, but @auto-rst nodes allow editing rst files directly, parsing the structure into the Leo outline).
It also provides a way to preview the resulting HTML, in a "viewrendered" pane.
FTE
The FTE Folding Text Editor - a free (licensed under the GNU GPL) text editor for developers. FTE has a mode for reStructuredText support. It provides color highlighting of basic RSTX elements and special menu that provide easy way to insert most popular RSTX elements to a document.
PyK
PyK is a successor of PyEdit and reStInPeace, written in Python with the help of the Qt4 toolkit.
Eclipse
The Eclipse IDE with the ReST Editor plug-in provides support for editing reStructuredText files.
NoTex
NoTex is a browser based (general purpose) text editor, with integrated project management and syntax highlighting. Plus it enables to write books, reports, articles etc. using rST and convert them to LaTex, PDF or HTML. The PDF files are of high publication quality and are produced via Sphinx with the Texlive LaTex suite.
Notepad++
Notepad++ is a general purpose text editor for Windows. It has syntax highlighting for many languages built-in and support for reStructuredText via a user defined language for reStructuredText.
Visual Studio Code
Visual Studio Code is a general purpose text editor for Windows/macOS/Linux. It has syntax highlighting for many languages built-in and supports reStructuredText via an extension from LeXtudio.
Dedicated reStructuredText Editors
- ReSTedit by Dinu Gherman and Bill Bumgarner
- Rest in Peace
- Enthought Tool Suite editor
- ReText a cross platform program that works like Marked.
- RSTPad a standalone cross-platform editor with live preview
Proprietary editors
Sublime Text
Sublime Text is a completely customizable and extensible source code editor available for Windows, OS X, and Linux. Registration is required for long-term use, but all functions are available in the unregistered version, with occasional reminders to purchase a license. Versions 2 and 3 (currently in beta) support reStructuredText syntax highlighting by default, and several plugins are available through the package manager Package Control to provide snippets and code completion, additional syntax highlighting, conversion to/from RST and other formats, and HTML preview in the browser.
BBEdit / TextWrangler
BBEdit (and its free variant TextWrangler) for Mac can syntax-highlight reStructuredText using this codeless language module.
TextMate
TextMate, a proprietary general-purpose GUI text editor for Mac OS X, has a bundle for reStructuredText.
Intype
Intype is a proprietary text editor for Windows, that support reStructuredText out of the box.
E Text Editor
E is a proprietary Text Editor licensed under the "Open Company License". It supports TextMate's bundles, so it should support reStructuredText the same way TextMate does.
PyCharm
PyCharm (and other IntelliJ platform IDEs?) has ReST/Sphinx support (syntax highlighting, autocomplete and preview).
)
Wiki
here are some Wiki programs that support the reStructuredText markup as the native markup syntax, or as an add-on:
MediaWiki
MediaWiki reStructuredText extension allows for reStructuredText markup in MediaWiki surrounded by <rst> and </rst>.
MoinMoin
MoinMoin is an advanced, easy to use and extensible WikiEngine with a large community of users. Said in a few words, it is about collaboration on easily editable web pages.
There is a reStructuredText Parser for MoinMoin.
Trac
Trac is an enhanced wiki and issue tracking system for software development projects. There is a reStructuredText Support in Trac.
This Wiki
This Wiki is a Webware for Python Wiki written by Ian Bicking. This wiki uses ReStructuredText for its markup.
rstiki
rstiki is a minimalist single-file personal wiki using reStructuredText syntax (via docutils) inspired by pwyky. It does not support authorship indication, versioning, hierarchy, chrome/framing/templating or styling. It leverages docutils/reStructuredText as the wiki syntax. As such, it's under 200 lines of code, and in a single file. You put it in a directory and it runs.
ikiwiki
Ikiwiki is a wiki compiler. It converts wiki pages into HTML pages suitable for publishing on a website. Ikiwiki stores pages and history in a revision control system such as Subversion or Git. There are many other features, including support for blogging, as well as a large array of plugins. It's reStructuredText plugin, however is somewhat limited and is not recommended as its' main markup language at this time.
Web Services
Sandbox
An Online reStructuredText editor can be used to play with the markup and see the results immediately.
Blogging frameworks
WordPress
WordPreSt reStructuredText plugin for WordPress. (PHP)
Zine
reStructuredText parser plugin for Zine (will become obsolete in version 0.2 when Zine is scheduled to get a native reStructuredText support). Zine is discontinued. (Python)
pelican
Pelican is a static blog generator that supports writing articles in ReST. (Python)
hyde
Hyde is a static website generator that supports ReST. (Python)
Acrylamid
Acrylamid is a static blog generator that supports writing articles in ReST. (Python)
Nikola
Nikola is a Static Site and Blog Generator that supports ReST. (Python)
ipsum genera
Ipsum genera is a static blog generator written in Nim.
Yozuch
Yozuch is a static blog generator written in Python.
More
- Voidspace: ReStructuredText Tools blog post.
- reStructuredText wiki post to the text.docutils.user mailing list.
- IBM's Developer Works XML Matters: reStructuredText article.
- MZlinux » Marc Links and Tips » Networking » World Wide Web » Wikis » Structured text formatters
Using ResourceManager
I went through a similar issue. If you consider your "YeagerTechResources.Resources", it means that your Resources.resx is at the root folder of your project.
Be careful to include the full path eg : "project\subfolder(s)\file[.resx]" to the ResourceManager constructor.
What IDE to use for Python?
Results
Alternatively, in plain text: (also available as a a screenshot)
Bracket Matching -. .- Line Numbering
Smart Indent -. | | .- UML Editing / Viewing
Source Control Integration -. | | | | .- Code Folding
Error Markup -. | | | | | | .- Code Templates
Integrated Python Debugging -. | | | | | | | | .- Unit Testing
Multi-Language Support -. | | | | | | | | | | .- GUI Designer (Qt, Eric, etc)
Auto Code Completion -. | | | | | | | | | | | | .- Integrated DB Support
Commercial/Free -. | | | | | | | | | | | | | | .- Refactoring
Cross Platform -. | | | | | | | | | | | | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Atom |Y |F |Y |Y*|Y |Y |Y |Y |Y |Y | |Y |Y | | | | |*many plugins
Editra |Y |F |Y |Y | | |Y |Y |Y |Y | |Y | | | | | |
Emacs |Y |F |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y | | | |
Eric Ide |Y |F |Y | |Y |Y | |Y | |Y | |Y | |Y | | | |
Geany |Y |F |Y*|Y | | | |Y |Y |Y | |Y | | | | | |*very limited
Gedit |Y |F |Y¹|Y | | | |Y |Y |Y | | |Y²| | | | |¹with plugin; ²sort of
Idle |Y |F |Y | |Y | | |Y |Y | | | | | | | | |
IntelliJ |Y |CF|Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |
JEdit |Y |F | |Y | | | | |Y |Y | |Y | | | | | |
KDevelop |Y |F |Y*|Y | | |Y |Y |Y |Y | |Y | | | | | |*no type inference
Komodo |Y |CF|Y |Y |Y |Y |Y |Y |Y |Y | |Y |Y |Y | |Y | |
NetBeans* |Y |F |Y |Y |Y | |Y |Y |Y |Y |Y |Y |Y |Y | | |Y |*pre-v7.0
Notepad++ |W |F |Y |Y | |Y*|Y*|Y*|Y |Y | |Y |Y*| | | | |*with plugin
Pfaide |W |C |Y |Y | | | |Y |Y |Y | |Y |Y | | | | |
PIDA |LW|F |Y |Y | | | |Y |Y |Y | |Y | | | | | |VIM based
PTVS |W |F |Y |Y |Y |Y |Y |Y |Y |Y | |Y | | |Y*| |Y |*WPF bsed
PyCharm |Y |CF|Y |Y*|Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |*JavaScript
PyDev (Eclipse) |Y |F |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y | | | |
PyScripter |W |F |Y | |Y |Y | |Y |Y |Y | |Y |Y |Y | | | |
PythonWin |W |F |Y | |Y | | |Y |Y | | |Y | | | | | |
SciTE |Y |F¹| |Y | |Y | |Y |Y |Y | |Y |Y | | | | |¹Mac version is
ScriptDev |W |C |Y |Y |Y |Y | |Y |Y |Y | |Y |Y | | | | | commercial
Spyder |Y |F |Y | |Y |Y | |Y |Y |Y | | | | | | | |
Sublime Text |Y |CF|Y |Y | |Y |Y |Y |Y |Y | |Y |Y |Y*| | | |extensible w/Python,
TextMate |M |F | |Y | | |Y |Y |Y |Y | |Y |Y | | | | | *PythonTestRunner
UliPad |Y |F |Y |Y |Y | | |Y |Y | | | |Y |Y | | | |
Vim |Y |F |Y |Y |Y |Y |Y |Y |Y |Y | |Y |Y |Y | | | |
Visual Studio |W |CF|Y |Y |Y |Y |Y |Y |Y |Y |? |Y |? |? |Y |? |Y |
Visual Studio Code|Y |F |Y |Y |Y |Y |Y |Y |Y |Y |? |Y |? |? |? |? |Y |uses plugins
WingIde |Y |C |Y |Y*|Y |Y |Y |Y |Y |Y | |Y |Y |Y | | | |*support for C
Zeus |W |C | | | | |Y |Y |Y |Y | |Y |Y | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Cross Platform -' | | | | | | | | | | | | | | | |
Commercial/Free -' | | | | | | | | | | | | | | '- Refactoring
Auto Code Completion -' | | | | | | | | | | | | '- Integrated DB Support
Multi-Language Support -' | | | | | | | | | | '- GUI Designer (Qt, Eric, etc)
Integrated Python Debugging -' | | | | | | | | '- Unit Testing
Error Markup -' | | | | | | '- Code Templates
Source Control Integration -' | | | | '- Code Folding
Smart Indent -' | | '- UML Editing / Viewing
Bracket Matching -' '- Line Numbering
Acronyms used:
L - Linux
W - Windows
M - Mac
C - Commercial
F - Free
CF - Commercial with Free limited edition
? - To be confirmed
I don't mention basics like syntax highlighting as I expect these by default.
This is a just dry list reflecting your feedback and comments, I am not advocating any of these tools. I will keep updating this list as you keep posting your answers.
PS. Can you help me to add features of the above editors to the list (like auto-complete, debugging, etc.)?
We have a comprehensive wiki page for this question https://wiki.python.org/moin/IntegratedDevelopmentEnvironments
What is a pre-revprop-change hook in SVN, and how do I create it?
For Windows, here's a link to an example batch file that only allows changes to the log message (not other properties):
http://ayria.livejournal.com/33438.html
Basically copy the code below into a text file and name it pre-revprop-change.bat and save it in the \hooks subdirectory for your repository.
@ECHO OFF
:: Set all parameters. Even though most are not used, in case you want to add
:: changes that allow, for example, editing of the author or addition of log messages.
set repository=%1
set revision=%2
set userName=%3
set propertyName=%4
set action=%5
:: Only allow the log message to be changed, but not author, etc.
if /I not "%propertyName%" == "svn:log" goto ERROR_PROPNAME
:: Only allow modification of a log message, not addition or deletion.
if /I not "%action%" == "M" goto ERROR_ACTION
:: Make sure that the new svn:log message is not empty.
set bIsEmpty=true
for /f "tokens=*" %%g in ('find /V ""') do (
set bIsEmpty=false
)
if "%bIsEmpty%" == "true" goto ERROR_EMPTY
goto :eof
:ERROR_EMPTY
echo Empty svn:log messages are not allowed. >&2
goto ERROR_EXIT
:ERROR_PROPNAME
echo Only changes to svn:log messages are allowed. >&2
goto ERROR_EXIT
:ERROR_ACTION
echo Only modifications to svn:log revision properties are allowed. >&2
goto ERROR_EXIT
:ERROR_EXIT
exit /b 1
Are parameters in strings.xml possible?
If you need to format your strings using String.format(String, Object...), then you can do so by putting your format arguments in the string resource. For example, with the following resource:
<string name="welcome_messages">Hello, %1$s! You have %2$d new messages.</string>In this example, the format string has two arguments: %1$s is a string and %2$d is a decimal number. You can format the string with arguments from your application like this:
Resources res = getResources(); String text = String.format(res.getString(R.string.welcome_messages), username, mailCount);
If you wish more look at: http://developer.android.com/intl/pt-br/guide/topics/resources/string-resource.html#FormattingAndStyling
Convert string (without any separator) to list
Did you try list(x)??
y = '+123-456-7890'
c =list(y)
c
['+', '1', '2', '3', '-', '4', '5', '6', '-', '7', '8', '9', '0']
Load resources from relative path using local html in uiwebview
I simply do this:
UIWebView *webView = [[[UIWebView alloc] init] autorelease];
NSURL *url = [[NSBundle mainBundle] URLForResource:@"index" withExtension:@"html"];
NSURLRequest* request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
Where "index.html" relatively references images, CSS, javascript, etc.
Read and Write CSV files including unicode with Python 2.7
Another alternative:
Use the code from the unicodecsv package ...
https://pypi.python.org/pypi/unicodecsv/
>>> import unicodecsv as csv
>>> from io import BytesIO
>>> f = BytesIO()
>>> w = csv.writer(f, encoding='utf-8')
>>> _ = w.writerow((u'é', u'ñ'))
>>> _ = f.seek(0)
>>> r = csv.reader(f, encoding='utf-8')
>>> next(r) == [u'é', u'ñ']
True
This module is API compatible with the STDLIB csv module.
Installation of SQL Server Business Intelligence Development Studio
http://msdn.microsoft.com/en-us/library/ms173767.aspx
Business Intelligence Development Studio is Microsoft Visual Studio 2008 with additional project types that are specific to SQL Server business intelligence. Business Intelligence Development Studio is the primary environment that you will use to develop business solutions that include Analysis Services, Integration Services, and Reporting Services projects. Each project type supplies templates for creating the objects required for business intelligence solutions, and provides a variety of designers, tools, and wizards to work with the objects.
If you already have Visual Studio installed, the new project types will be installed along with SQL Server.
Convert String with Dot or Comma as decimal separator to number in JavaScript
You could replace all spaces by an empty string, all comas by dots and then parse it.
var str = "110 000,23";
var num = parseFloat(str.replace(/\s/g, "").replace(",", "."));
console.log(num);
I used a regex in the first one to be able to match all spaces, not just the first one.
CSS scale height to match width - possibly with a formfactor
You could try using vw for height.
https://developer.mozilla.org/en/docs/Web/CSS/length
Something like
div#map {
width: 100%;
height: 60vw;
}
This would set the width of the div to 60% of the viewport width. You will probably need to use calc to adjust to take padding into account …
How to convert Windows end of line in Unix end of line (CR/LF to LF)
Go back to Windows, tell Eclipse to change the encoding to UTF-8, then back to Unix and run d2u on the files.
Break statement in javascript array map method
That's not possible using the built-in Array.prototype.map. However, you could use a simple for-loop instead, if you do not intend to map any values:
var hasValueLessThanTen = false;
for (var i = 0; i < myArray.length; i++) {
if (myArray[i] < 10) {
hasValueLessThanTen = true;
break;
}
}
Or, as suggested by @RobW, use Array.prototype.some to test if there exists at least one element that is less than 10. It will stop looping when some element that matches your function is found:
var hasValueLessThanTen = myArray.some(function (val) {
return val < 10;
});
How to add results of two select commands in same query
UNION ALL once, aggregate once:
SELECT sum(hours) AS total_hours
FROM (
SELECT hours FROM resource
UNION ALL
SELECT hours FROM "projects-time" -- illegal name without quotes in most RDBMS
) x
Install php-mcrypt on CentOS 6
To install mcrypt from http://namhuy.net/641/centos-6-install-mcrypt-for-phpmyadmin.html
i386
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
x86_64
http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
then just use yum command to install the mcrypt package
yum install php-mcrypt
Error running android: Gradle project sync failed. Please fix your project and try again
It could be that you are using gradle in offline mode.
To uncheck it go to File > Settings > Gradle, uncheck the Offline Work checkbox, and click Apply
Make sure you have internet connection and sync the project again.
Laravel blank white screen
There might be a lot of reasons behind the blank screen without errors. I have faced this problem many times whenever I want to upload laravel project in shared hosting.
Reason: Incorrect PHP Version
In my case, issue was because of incorrect php version. I had php 7.1 version in local computer where as in shared hosting cpanel, there was php 5.6 version. Switching up the version from 5.6 to 7.1 worked for me.
You can change php version in cpanel from multiphp manager available in cpanel home page.
How to add extra whitespace in PHP?
to make your code look better when viewing source
$variable = 'foo';
echo "this is my php variable $variable \n";
echo "this is another php echo here $variable\n";
your code when view source will look like, with nice line returns thanks to \n
this is my php variable foo
this is another php echo here foo
Flutter - Layout a Grid
There are few named constructors in GridView for different scenarios,
Constructors
GridViewGridView.builderGridView.countGridView.customGridView.extent
Below is a example of GridView constructor:
import 'package:flutter/material.dart';
void main() => runApp(
MaterialApp(
home: ExampleGrid(),
),
);
class ExampleGrid extends StatelessWidget {
List<String> images = [
"https://uae.microless.com/cdn/no_image.jpg",
"https://images-na.ssl-images-amazon.com/images/I/81aF3Ob-2KL._UX679_.jpg",
"https://www.boostmobile.com/content/dam/boostmobile/en/products/phones/apple/iphone-7/silver/device-front.png.transform/pdpCarousel/image.jpg",
"https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSgUgs8_kmuhScsx-J01d8fA1mhlCR5-1jyvMYxqCB8h3LCqcgl9Q",
"https://ae01.alicdn.com/kf/HTB11tA5aiAKL1JjSZFoq6ygCFXaw/Unlocked-Samsung-GALAXY-S2-I9100-Mobile-Phone-Android-Wi-Fi-GPS-8-0MP-camera-Core-4.jpg_640x640.jpg",
"https://media.ed.edmunds-media.com/gmc/sierra-3500hd/2018/td/2018_gmc_sierra-3500hd_f34_td_411183_1600.jpg",
"https://hips.hearstapps.com/amv-prod-cad-assets.s3.amazonaws.com/images/16q1/665019/2016-chevrolet-silverado-2500hd-high-country-diesel-test-review-car-and-driver-photo-665520-s-original.jpg",
"https://www.galeanasvandykedodge.net/assets/stock/ColorMatched_01/White/640/cc_2018DOV170002_01_640/cc_2018DOV170002_01_640_PSC.jpg",
"https://media.onthemarket.com/properties/6191869/797156548/composite.jpg",
"https://media.onthemarket.com/properties/6191840/797152761/composite.jpg",
];
@override
Widget build(BuildContext context) {
return Scaffold(
body: GridView(
physics: BouncingScrollPhysics(), // if you want IOS bouncing effect, otherwise remove this line
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),//change the number as you want
children: images.map((url) {
return Card(child: Image.network(url));
}).toList(),
),
);
}
}
If you want your GridView items to be dynamic according to the content, you can few lines to do that but the simplest way to use StaggeredGridView package. I have provided an answer with example here.
Below is an example for a GridView.count:
import 'package:flutter/material.dart';
void main() => runApp(
MaterialApp(
home: ExampleGrid(),
),
);
class ExampleGrid extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: GridView.count(
crossAxisCount: 4,
children: List.generate(40, (index) {
return Card(
child: Image.network("https://robohash.org/$index"),
); //robohash.org api provide you different images for any number you are giving
}),
),
);
}
}
Screenshot for above snippet:
Example for a SliverGridView:
import 'package:flutter/material.dart';
void main() => runApp(
MaterialApp(
home: ExampleGrid(),
),
);
class ExampleGrid extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: CustomScrollView(
primary: false,
slivers: <Widget>[
SliverPadding(
padding: const EdgeInsets.all(20.0),
sliver: SliverGrid.count(
crossAxisSpacing: 10.0,
crossAxisCount: 2,
children: List.generate(20, (index) {
return Card(child: Image.network("https://robohash.org/$index"));
}),
),
),
],
)
);
}
}
jQuery getJSON save result into variable
$.getJSon expects a callback functions either you pass it to the callback function or in callback function assign it to global variale.
var globalJsonVar;
$.getJSON("http://127.0.0.1:8080/horizon-update", function(json){
//do some thing with json or assign global variable to incoming json.
globalJsonVar=json;
});
IMO best is to call the callback function. which is nicer to eyes, readability aspects.
$.getJSON("http://127.0.0.1:8080/horizon-update", callbackFuncWithData);
function callbackFuncWithData(data)
{
// do some thing with data
}
CSS Outside Border
Try the outline property W3Schools - CSS Outline
Outline will not interfere with widths and lenghts of the elements/divs!
Please click the link I provided at the bottom to see working demos of the the different ways you can make borders, and inner/inline borders, even ones that do not disrupt the dimensions of the element! No need to add extra divs every time, as mentioned in another answer!
You can also combine borders with outlines, and if you like, box-shadows (also shown via link)
<head>
<style type="text/css" ref="stylesheet">
div {
width:22px;
height:22px;
outline:1px solid black;
}
</style>
</head>
<div>
outlined
</div>
Usually by default, 'border:' puts the border on the outside of the width, measurement, adding to the overall dimensions, unless you use the 'inset' value:
div {border: inset solid 1px black};
But 'outline:' is an extra border outside of the border, and of course still adds extra width/length to the element.
Hope this helps
PS: I also was inspired to make this for you : Using borders, outlines, and box-shadows
Get the current displaying UIViewController on the screen in AppDelegate.m
This is the best possible way that I have tried out. If it should help anyone...
+ (UIViewController*) topMostController
{
UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topController.presentedViewController) {
topController = topController.presentedViewController;
}
return topController;
}
UnicodeEncodeError: 'charmap' codec can't encode - character maps to <undefined>, print function
If you use Python 3.6 (possibly 3.5 or later), it doesn't give that error to me anymore. I had a similar issue, because I was using v3.4, but it went away after I uninstalled and reinstalled.
How to dynamically add a class to manual class names?
const ClassToggleFC= () =>{
const [isClass, setClass] = useState(false);
const toggle =() => {
setClass( prevState => !prevState)
}
return(
<>
<h1 className={ isClass ? "heading" : ""}> Hiii There </h1>
<button onClick={toggle}>Toggle</button>
</>
)
}
I simply created a Function Component. Inside I take a state and set initial value is false..
I have a button for toggling state..
Whenever we change state rerender component and if state value (isClass) is false h1's className should be "" and if state value (isClass) is true h1's className is "heading"
How can I get a specific number child using CSS?
For modern browsers, use td:nth-child(2) for the second td, and td:nth-child(3) for the third. Remember that these retrieve the second and third td for every row.
If you need compatibility with IE older than version 9, use sibling combinators or JavaScript as suggested by Tim. Also see my answer to this related question for an explanation and illustration of his method.
How do I remove the first characters of a specific column in a table?
If you have to remove the first few characters that are preceded by a special character like #, this is a good one:
UPDATE tblInvalidID
SET [ColumnName] =stuff(ColumnName, 1, charindex('#', ColumnName), ' ')
How to select rows that have current day's timestamp?
use DATE and CURDATE()
SELECT * FROM `table` WHERE DATE(`timestamp`) = CURDATE()
Warning! This query doesn't use an index efficiently. For the more efficient solution see the answer below
Counting the number of elements in array
This expands on the answer by Denis Bubnov.
I used this to find child values of array elements—namely if there was a anchor field in paragraphs on a Drupal 8 site to build a table of contents.
{% set count = 0 %}
{% for anchor in items %}
{% if anchor.content['#paragraph'].field_anchor_link.0.value %}
{% set count = count + 1 %}
{% endif %}
{% endfor %}
{% if count > 0 %}
--- build the toc here --
{% endif %}
Angular 2: How to call a function after get a response from subscribe http.post
get_categories(number){
return this.http.post( url, body, {headers: headers, withCredentials:true})
.map(t=> {
this.total = t.json();
return total;
}).share();
);
}
then
this.get_category(1).subscribe(t=> {
this.callfunc();
});
Mail not sending with PHPMailer over SSL using SMTP
First, Google created the "use less secure accounts method" function:
https://myaccount.google.com/security
Then created the another permission:
https://accounts.google.com/b/0/DisplayUnlockCaptcha
Hope it helps.
Spring Boot application as a Service
In systemd unit files you can set environment variables directory or through an EnvironmentFile. I would propose doing things this way since it seems to be the least amount of friction.
Sample unit file
$ cat /etc/systemd/system/hello-world.service
[Unit]
Description=Hello World Service
After=systend-user-sessions.service
[Service]
EnvironmentFile=/etc/sysconfig/hello-world
Type=simple
ExecStart=/usr/bin/java ... hello-world.jar
Then setup a file under /etc/sysconfig/hello-world which includes uppercase names of your Spring Boot variables. For example, a variable called server.port would follow the form SERVER_PORT as an environment variable:
$ cat /etc/sysconfig/hello-world
SERVER_PORT=8081
The mechanism being exploited here is that Spring Boot applications will take the list of properties and then translate them, making everything uppercase, and replacing dots with underscores. Once the Spring Boot app goes through this process, it then looks for environment variables that match, and uses any found accordingly.
This is highlighted in more detail in this SO Q&A titled: How to set a Spring Boot property with an underscore in its name via Environment Variables?
References
A failure occurred while executing com.android.build.gradle.internal.tasks
In my case problem arose due to gradle version upgradation from 6.2 all to 6.6 all in gradle wrapper. So i wiped out data of avd and restarted it and then deleted .gradle folder in android/.gradle and then run yarn start --reset-cache and yarn android. Then it worked for me
How does facebook, gmail send the real time notification?
One important issue with long polling is error handling. There are two types of errors:
The request might timeout in which case the client should reestablish the connection immediately. This is a normal event in long polling when no messages have arrived.
A network error or an execution error. This is an actual error which the client should gracefully accept and wait for the server to come back on-line.
The main issue is that if your error handler reestablishes the connection immediately also for a type 2 error, the clients would DOS the server.
Both answers with code sample miss this.
function longPoll() {
var shouldDelay = false;
$.ajax({
url: 'poll.php',
async: true, // by default, it's async, but...
dataType: 'json', // or the dataType you are working with
timeout: 10000, // IMPORTANT! this is a 10 seconds timeout
cache: false
}).done(function (data, textStatus, jqXHR) {
// do something with data...
}).fail(function (jqXHR, textStatus, errorThrown ) {
shouldDelay = textStatus !== "timeout";
}).always(function() {
// in case of network error. throttle otherwise we DOS ourselves. If it was a timeout, its normal operation. go again.
var delay = shouldDelay ? 10000: 0;
window.setTimeout(longPoll, delay);
});
}
longPoll(); //fire first handler
iOS Swift - Get the Current Local Time and Date Timestamp
For saving Current time to firebase database I use Unic Epoch Conversation:
let timestamp = NSDate().timeIntervalSince1970
and For Decoding Unix Epoch time to Date().
let myTimeInterval = TimeInterval(timestamp)
let time = NSDate(timeIntervalSince1970: TimeInterval(myTimeInterval))
How to fix apt-get: command not found on AWS EC2?
please, be sure your connected to a ubuntu server, I Had the same problem but I was connected to other distro, check the AMI value in your details instance, it should be something like
AMI: ubuntu/images/ebs/ubuntu-precise-12.04-amd64-server-20130411.1
hope it helps
password for postgres
Set the default password in the .pgpass file. If the server does not save the password, it is because it is not set in the .pgpass file, or the permissions are open and the file is therefore ignored.
Read more about the password file here.
Also, be sure to check the permissions: on *nix systems the permissions on .pgpass must disallow any access to world or group; achieve this by the command chmod 0600 ~/.pgpass. If the permissions are less strict than this, the file will be ignored.
Have you tried logging-in using PGAdmin? You can save the password there, and modify the pgpass file.
How to add "Maven Managed Dependencies" library in build path eclipse?
You could also consider to maven-dependency-plugin to your pom:
<plugins>
...
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<phase>process-resources</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
...
</plugins>
Than you can run "mvn package" and maven will copy all needed dependencies to your_project_path/target/your_project_name/WEB-INF/lib/ directory. From there you can copy them to your project/lib dir and add as external jars (configuring your project settings buildpath)
How to make 'submit' button disabled?
Form validation is very much straight forward in Angular 2
Here is an example,
<form (ngSubmit)="onSubmit()" #myForm="ngForm">
<div class="form-group">
<label for="firstname">First Name</label>
<input type="text" class="form-control" id="firstname"
required [(ngModel)]="firstname" name="firstname">
</div>
<div class="form-group">
<label for="middlename">Middle Name</label>
<input type="text" class="form-control" id="middlename"
[(ngModel)]="middlename" name="middlename">
</div>
<div class="form-group">
<label for="lastname">Last Name</label>
<input type="text" class="form-control" id="lastname"
required minlength = '2' maxlength="6" [(ngModel)] = "lastname" name="lastname">
</div>
<div class="form-group">
<label for="mobnumber">Mob Number</label>
<input type="text" class="form-control" id="mobnumber"
minlength = '2' maxlength="10" pattern="^[0-9()\-+\s]+$"
[(ngModel)] = "mobnumber" name="mobnumber">
</div>
<button type="submit" [disabled]="!myForm.form.valid">Submit</button>
</form>
Case Statement Equivalent in R
Here's a way using the switch statement:
df <- data.frame(name = c('cow','pig','eagle','pigeon'),
stringsAsFactors = FALSE)
df$type <- sapply(df$name, switch,
cow = 'animal',
pig = 'animal',
eagle = 'bird',
pigeon = 'bird')
> df
name type
1 cow animal
2 pig animal
3 eagle bird
4 pigeon bird
The one downside of this is that you have to keep writing the category name (animal, etc) for each item. It is syntactically more convenient to be able to define our categories as below (see the very similar question How do add a column in a data frame in R )
myMap <- list(animal = c('cow', 'pig'), bird = c('eagle', 'pigeon'))
and we want to somehow "invert" this mapping. I write my own invMap function:
invMap <- function(map) {
items <- as.character( unlist(map) )
nams <- unlist(Map(rep, names(map), sapply(map, length)))
names(nams) <- items
nams
}
and then invert the above map as follows:
> invMap(myMap)
cow pig eagle pigeon
"animal" "animal" "bird" "bird"
And then it's easy to use this to add the type column in the data-frame:
df <- transform(df, type = invMap(myMap)[name])
> df
name type
1 cow animal
2 pig animal
3 eagle bird
4 pigeon bird
Array to Hash Ruby
Enumerator includes Enumerable. Since 2.1, Enumerable also has a method #to_h. That's why, we can write :-
a = ["item 1", "item 2", "item 3", "item 4"]
a.each_slice(2).to_h
# => {"item 1"=>"item 2", "item 3"=>"item 4"}
Because #each_slice without block gives us Enumerator, and as per the above explanation, we can call the #to_h method on the Enumerator object.
How do I convert a float to an int in Objective C?
I'm pretty sure C-style casting syntax works in Objective C, so try that, too:
int myInt = (int) myFloat;
It might silence a compiler warning, at least.
XAMPP: Couldn't start Apache (Windows 10)
- Go to the start menu, and type Turn Windows features on or off
- Uncheck Internet Information Services
- Press OK
How to test if a DataSet is empty?
To check dataset is empty or not You have to check null and tables count.
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(sqlString, sqlConn);
da.Fill(ds);
if(ds != null && ds.Tables.Count > 0)
{
// your code
}
How can we stop a running java process through Windows cmd?
It is rather messy but you need to do something like the following:
START "do something window" dir
FOR /F "tokens=2" %I in ('TASKLIST /NH /FI "WINDOWTITLE eq do something window"' ) DO SET PID=%I
ECHO %PID%
TASKKILL /PID %PID%
Found this on this page.
(This kind of thing is much easier if you have a UNIX / LINUX system ... or if you run Cygwin or similar on Windows.)
Replace missing values with column mean
To add to the alternatives, using @akrun's sample data, I would do the following:
d1[] <- lapply(d1, function(x) {
x[is.na(x)] <- mean(x, na.rm = TRUE)
x
})
d1
Repeat a task with a time delay?
There are 3 ways to do it:
Use ScheduledThreadPoolExecutor
A bit of overkill since you don't need a pool of Thread
//----------------------SCHEDULER-------------------------
private final ScheduledThreadPoolExecutor executor_ =
new ScheduledThreadPoolExecutor(1);
ScheduledFuture<?> schedulerFuture;
public void startScheduler() {
schedulerFuture= executor_.scheduleWithFixedDelay(new Runnable() {
@Override
public void run() {
//DO YOUR THINGS
pageIndexSwitcher.setVisibility(View.GONE);
}
}, 0L, 5*MILLI_SEC, TimeUnit.MILLISECONDS);
}
public void stopScheduler() {
pageIndexSwitcher.setVisibility(View.VISIBLE);
schedulerFuture.cancel(false);
startScheduler();
}
Use Timer Task
Old Android Style
//----------------------TIMER TASK-------------------------
private Timer carousalTimer;
private void startTimer() {
carousalTimer = new Timer(); // At this line a new Thread will be created
carousalTimer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
//DO YOUR THINGS
pageIndexSwitcher.setVisibility(INVISIBLE);
}
}, 0, 5 * MILLI_SEC); // delay
}
void stopTimer() {
carousalTimer.cancel();
}
Use Handler and Runnable
Modern Android Style
//----------------------HANDLER-------------------------
private Handler taskHandler = new android.os.Handler();
private Runnable repeatativeTaskRunnable = new Runnable() {
public void run() {
//DO YOUR THINGS
}
};
void startHandler() {
taskHandler.postDelayed(repeatativeTaskRunnable, 5 * MILLI_SEC);
}
void stopHandler() {
taskHandler.removeCallbacks(repeatativeTaskRunnable);
}
Non-Leaky Handler with Activity / Context
Declare an inner Handler class which does not leak Memory in your Activity/Fragment class
/**
* Instances of static inner classes do not hold an implicit
* reference to their outer class.
*/
private static class NonLeakyHandler extends Handler {
private final WeakReference<FlashActivity> mActivity;
public NonLeakyHandler(FlashActivity activity) {
mActivity = new WeakReference<FlashActivity>(activity);
}
@Override
public void handleMessage(Message msg) {
FlashActivity activity = mActivity.get();
if (activity != null) {
// ...
}
}
}
Declare a runnable which will perform your repetitive task in your Activity/Fragment class
private Runnable repeatativeTaskRunnable = new Runnable() {
public void run() {
new Handler(getMainLooper()).post(new Runnable() {
@Override
public void run() {
//DO YOUR THINGS
}
};
Initialize Handler object in your Activity/Fragment (here FlashActivity is my activity class)
//Task Handler
private Handler taskHandler = new NonLeakyHandler(FlashActivity.this);
To repeat a task after fix time interval
taskHandler.postDelayed(repeatativeTaskRunnable , DELAY_MILLIS);
To stop the repetition of task
taskHandler .removeCallbacks(repeatativeTaskRunnable );
UPDATE: In Kotlin:
//update interval for widget
override val UPDATE_INTERVAL = 1000L
//Handler to repeat update
private val updateWidgetHandler = Handler()
//runnable to update widget
private var updateWidgetRunnable: Runnable = Runnable {
run {
//Update UI
updateWidget()
// Re-run it after the update interval
updateWidgetHandler.postDelayed(updateWidgetRunnable, UPDATE_INTERVAL)
}
}
// SATART updating in foreground
override fun onResume() {
super.onResume()
updateWidgetHandler.postDelayed(updateWidgetRunnable, UPDATE_INTERVAL)
}
// REMOVE callback if app in background
override fun onPause() {
super.onPause()
updateWidgetHandler.removeCallbacks(updateWidgetRunnable);
}
Open File in Another Directory (Python)
Its a very old question but I think it will help newbies line me who are learning python. If you have Python 3.4 or above, the pathlib library comes with the default distribution.
To use it, you just pass a path or filename into a new Path() object using forward slashes and it handles the rest. To indicate that the path is a raw string, put r in front of the string with your actual path.
For example,
from pathlib import Path
dataFolder = Path(r'D:\Desktop dump\example.txt')
Source: The easy way to deal with file paths on Windows, Mac and Linux
Can you style html form buttons with css?
Yes you can target those specificaly using input[type=submit] e.g.
.myFormClass input[type=submit] {
margin: 10px;
color: white;
background-color: blue;
}
How to Upload Image file in Retrofit 2
Using Retrofit 2.0 you may use this:
@Multipart
@POST("uploadImage")
Call<ResponseBody> uploadImage(@Part("file\"; fileName=\"myFile.png\" ")RequestBody requestBodyFile, @Part("image") RequestBody requestBodyJson);
Make a request:
File imgFile = new File("YOUR IMAGE FILE PATH");
RequestBody requestBodyFile = RequestBody.create(MediaType.parse("image/*"), imgFile);
RequestBody requestBodyJson = RequestBody.create(MediaType.parse("text/plain"),
retrofitClient.getJsonObject(uploadRequest));
//make sync call
Call<ResponseBody> uploadBundle = uploadImpl.uploadImage(requestBodyFile, requestBodyJson);
Response<BaseResponse> response = uploadBundle.execute();
please refer https://square.github.io/retrofit/
make script execution to unlimited
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();
Error Installing Homebrew - Brew Command Not Found
nano ~/.profile
add these lines:
export PATH="$HOME/.linuxbrew/bin:$PATH"
export MANPATH="$HOME/.linuxbrew/share/man:$MANPATH"
export INFOPATH="$HOME/.linuxbrew/share/info:$INFOPATH"
save the file:
Ctrl + X then Y then Enter
then render the changes:
source ~/.profile
Ruby class instance variable vs. class variable
For those with a C++ background, you may be interested in a comparison with the C++ equivalent:
class S
{
private: // this is not quite true, in Ruby you can still access these
static int k = 23;
int s = 15;
public:
int get_s() { return s; }
static int get_k() { return k; }
};
std::cerr << S::k() << "\n";
S instance;
std::cerr << instance.s() << "\n";
std::cerr << instance.k() << "\n";
As we can see, k is a static like variable. This is 100% like a global variable, except that it's owned by the class (scoped to be correct). This makes it easier to avoid clashes between similarly named variables. Like any global variable, there is just one instance of that variable and modifying it is always visible by all.
On the other hand, s is an object specific value. Each object has its own instance of the value. In C++, you must create an instance to have access to that variable. In Ruby, the class definition is itself an instance of the class (in JavaScript, this is called a prototype), therefore you can access s from the class without additional instantiation. The class instance can be modified, but modification of s is going to be specific to each instance (each object of type S). So modifying one will not change the value in another.
Saving an Excel sheet in a current directory with VBA
If the Path is omitted the file will be saved automaticaly in the current directory. Try something like this:
ActiveWorkbook.SaveAs "Filename.xslx"
How to add icon inside EditText view in Android ?
Use a relative layout and set the button the be align left of the edit text view, and set the left padding of your text view to the size of your button. I can't think of a good way to do it without hard coding the padding :/
You can also use apk tool to sorta unzip the facebook apk and take a look at its layout files.
MYSQL Truncated incorrect DOUBLE value
What it basically is
It's incorrect syntax that causes MySQL to think you're trying to do something with a column or parameter that has the incorrect type "DOUBLE".
Learn from my mistake
In my case I updated the varchar column in a table setting NULL where the value 0 stood. My update query was like this:
UPDATE myTable SET myValue = NULL WHERE myValue = 0;
Now, since the actual type of myValue is VARCHAR(255) this gives the warning:
+---------+------+-----------------------------------------------+
| Level | Code | Message |
+---------+------+-----------------------------------------------+
| Warning | 1292 | Truncated incorrect DOUBLE value: 'value xyz' |
+---------+------+-----------------------------------------------+
And now myTable is practically empty, because myValue is now NULL for EVERY ROW in the table! How did this happen?
*internal screaming*
Over 30k rows now have missing data.
*internal screaming intensifies*
Thank goodness for backups. I was able to recover all the data.
*internal screaming intensity lowers*
The corrected query is as follows:
UPDATE myTable SET myValue = NULL WHERE myValue = '0';
^^^
Quotation here!
I wish this was more than just a warning so it's less dangerous to forget those quotes.
*End internal screaming*
Order a MySQL table by two columns
ORDER BY article_rating ASC , article_time DESC
DESC at the end will sort by both columns descending. You have to specify ASC if you want it otherwise
Window.open as modal popup?
That solution will open up a new browser window without the normal features such as address bar and similar.
To implement a modal popup, I suggest you to take a look at jQuery and SimpleModal, which is really slick.
(Here are some simple demos using SimpleModal: http://www.ericmmartin.com/projects/simplemodal-demos/)
Is it possible to forward-declare a function in Python?
If you don't want to define a function before it's used, and defining it afterwards is impossible, what about defining it in some other module?
Technically you still define it first, but it's clean.
You could create a recursion like the following:
def foo():
bar()
def bar():
foo()
Python's functions are anonymous just like values are anonymous, yet they can be bound to a name.
In the above code, foo() does not call a function with the name foo, it calls a function that happens to be bound to the name foo at the point the call is made. It is possible to redefine foo somewhere else, and bar would then call the new function.
Your problem cannot be solved because it's like asking to get a variable which has not been declared.
How to set a DateTime variable in SQL Server 2008?
The CONVERT function helps.Check this:
declare @erro_event_timestamp as Timestamp;
set @erro_event_timestamp = CONVERT(Timestamp, '2020-07-06 05:19:44.380', 121);
The magic number 121 I found here: https://www.w3schools.com/SQL/func_sqlserver_convert.asp
NSArray + remove item from array
Here's a more functional approach using Key-Value Coding:
@implementation NSArray (Additions)
- (instancetype)arrayByRemovingObject:(id)object {
return [self filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"SELF != %@", object]];
}
@end
How to determine MIME type of file in android?
Pay super close attention to umerk44's solution above. getMimeTypeFromExtension invokes guessMimeTypeTypeFromExtension and is CASE SENSITIVE. I spent an afternoon on this then took a closer look - getMimeTypeFromExtension will return NULL if you pass it "JPG" whereas it will return "image/jpeg" if you pass it "jpg".
HTML5 Canvas Rotate Image
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
- load Image, calculate boundaryRad
- create temporary canvas
- move canvas context origin to joint position of the projected rect
- rotate canvas context with input degree amount
- use canvas.toDataURL method to make image blob
- using image blob, create new Image element and render
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)
}
send mail to multiple receiver with HTML mailto
"There are no safe means of assigning multiple recipients to a single mailto: link via HTML. There are safe, non-HTML, ways of assigning multiple recipients from a mailto: link."
http://www.sightspecific.com/~mosh/www_faq/multrec.html
For a quick fix to your problem, change your ; to a comma , and eliminate the spaces between email addresses
<a href='mailto:[email protected],[email protected]'>Email Us</a>
unresolved external symbol __imp__fprintf and __imp____iob_func, SDL2
Microsoft has a special note on this (https://msdn.microsoft.com/en-us/library/bb531344.aspx#BK_CRT):
The printf and scanf family of functions are now defined inline.
The definitions of all of the printf and scanf functions have been moved inline into stdio.h, conio.h, and other CRT headers. This is a breaking change that leads to a linker error (LNK2019, unresolved external symbol) for any programs that declared these functions locally without including the appropriate CRT headers. If possible, you should update the code to include the CRT headers (that is, add #include ) and the inline functions, but if you do not want to modify your code to include these header files, an alternative solution is to add an additional library to your linker input, legacy_stdio_definitions.lib.
To add this library to your linker input in the IDE, open the context menu for the project node, choose Properties, then in the Project Properties dialog box, choose Linker, and edit the Linker Input to add legacy_stdio_definitions.lib to the semi-colon-separated list.
If your project links with static libraries that were compiled with a release of Visual C++ earlier than 2015, the linker might report an unresolved external symbol. These errors might reference internal stdio definitions for _iob, _iob_func, or related imports for certain stdio functions in the form of __imp_*. Microsoft recommends that you recompile all static libraries with the latest version of the Visual C++ compiler and libraries when you upgrade a project. If the library is a third-party library for which source is not available, you should either request an updated binary from the third party or encapsulate your usage of that library into a separate DLL that you compile with the older version of the Visual C++ compiler and libraries.
HTML5 Canvas background image
Why don't you style it out:
<canvas id="canvas" width="800" height="600" style="background: url('./images/image.jpg')">
Your browser does not support the canvas element.
</canvas>
HTML embed autoplay="false", but still plays automatically
<embed ... autostart="0">
Replace false with 0
How can I use console logging in Internet Explorer?
There is Firebug Lite which gives a lot of Firebug functionality in IE.
How can I change the font-size of a select option?
Tell the option element to be 13pt
select option{
font-size: 13pt;
}
and then the first option element to be 7pt
select option:first-child {
font-size: 7pt;
}
Running demo: http://jsfiddle.net/VggvD/1/
How to make a variadic macro (variable number of arguments)
__VA_ARGS__ is the standard way to do it. Don't use compiler-specific hacks if you don't have to.
I'm really annoyed that I can't comment on the original post. In any case, C++ is not a superset of C. It is really silly to compile your C code with a C++ compiler. Don't do what Donny Don't does.
Send Email to multiple Recipients with MailMessage?
I've tested this using the following powershell script and using (,) between the addresses. It worked for me!
$EmailFrom = "<[email protected]>";
$EmailPassword = "<password>";
$EmailTo = "<[email protected]>,<[email protected]>";
$SMTPServer = "<smtp.server.com>";
$SMTPPort = <port>;
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer,$SMTPPort);
$SMTPClient.EnableSsl = $true;
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential($EmailFrom, $EmailPassword);
$Subject = "Notification from XYZ";
$Body = "this is a notification from XYZ Notifications..";
$SMTPClient.Send($EmailFrom, $EmailTo, $Subject, $Body);
Excel VBA If cell.Value =... then
You can determine if as certain word is found in a cell by using
If InStr(cell.Value, "Word1") > 0 Then
If Word1 is found in the string the InStr() function will return the location of the first character of Word1 in the string.
Node.js Write a line into a .txt file
Inserting data into the middle of a text file is not a simple task. If possible, you should append it to the end of your file.
The easiest way to append data some text file is to use build-in fs.appendFile(filename, data[, options], callback) function from fs module:
var fs = require('fs')
fs.appendFile('log.txt', 'new data', function (err) {
if (err) {
// append failed
} else {
// done
}
})
But if you want to write data to log file several times, then it'll be best to use fs.createWriteStream(path[, options]) function instead:
var fs = require('fs')
var logger = fs.createWriteStream('log.txt', {
flags: 'a' // 'a' means appending (old data will be preserved)
})
logger.write('some data') // append string to your file
logger.write('more data') // again
logger.write('and more') // again
Node will keep appending new data to your file every time you'll call .write, until your application will be closed, or until you'll manually close the stream calling .end:
logger.end() // close string
How to automatically crop and center an image
One solution is to use a background image centered within an element sized to the cropped dimensions.
Basic example
.center-cropped {_x000D_
width: 100px;_x000D_
height: 100px;_x000D_
background-position: center center;_x000D_
background-repeat: no-repeat;_x000D_
}<div class="center-cropped" _x000D_
style="background-image: url('http://placehold.it/200x200');">_x000D_
</div>Example with img tag
This version retains the img tag so that we do not lose the ability to drag or right-click to save the image. Credit to Parker Bennett for the opacity trick.
.center-cropped {_x000D_
width: 100px;_x000D_
height: 100px;_x000D_
background-position: center center;_x000D_
background-repeat: no-repeat;_x000D_
overflow: hidden;_x000D_
}_x000D_
_x000D_
/* Set the image to fill its parent and make transparent */_x000D_
.center-cropped img {_x000D_
min-height: 100%;_x000D_
min-width: 100%;_x000D_
/* IE 8 */_x000D_
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";_x000D_
/* IE 5-7 */_x000D_
filter: alpha(opacity=0);_x000D_
/* modern browsers */_x000D_
opacity: 0;_x000D_
}<div class="center-cropped" _x000D_
style="background-image: url('http://placehold.it/200x200');">_x000D_
<img src="http://placehold.it/200x200" />_x000D_
</div>object-fit/-position
The CSS3 Images specification defines the object-fit and object-position properties which together allow for greater control over the scale and position of the image content of an img element. With these, it will be possible to achieve the desired effect:
.center-cropped {_x000D_
object-fit: none; /* Do not scale the image */_x000D_
object-position: center; /* Center the image within the element */_x000D_
height: 100px;_x000D_
width: 100px;_x000D_
}<img class="center-cropped" src="http://placehold.it/200x200" />Deserialize JSON with C#
Here is another site that will help you with all the code you need as long as you have a correctly formated JSON string available:
Multi-Column Join in Hibernate/JPA Annotations
This worked for me . In my case 2 tables foo and boo have to be joined based on 3 different columns.Please note in my case ,in boo the 3 common columns are not primary key
i.e., one to one mapping based on 3 different columns
@Entity
@Table(name = "foo")
public class foo implements Serializable
{
@Column(name="foocol1")
private String foocol1;
//add getter setter
@Column(name="foocol2")
private String foocol2;
//add getter setter
@Column(name="foocol3")
private String foocol3;
//add getter setter
private Boo boo;
private int id;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "brsitem_id", updatable = false)
public int getId()
{
return this.id;
}
public void setId(int id)
{
this.id = id;
}
@OneToOne
@JoinColumns(
{
@JoinColumn(updatable=false,insertable=false, name="foocol1", referencedColumnName="boocol1"),
@JoinColumn(updatable=false,insertable=false, name="foocol2", referencedColumnName="boocol2"),
@JoinColumn(updatable=false,insertable=false, name="foocol3", referencedColumnName="boocol3")
}
)
public Boo getBoo()
{
return boo;
}
public void setBoo(Boo boo)
{
this.boo = boo;
}
}
@Entity
@Table(name = "boo")
public class Boo implements Serializable
{
private int id;
@Column(name="boocol1")
private String boocol1;
//add getter setter
@Column(name="boocol2")
private String boocol2;
//add getter setter
@Column(name="boocol3")
private String boocol3;
//add getter setter
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "item_id", updatable = false)
public int getId()
{
return id;
}
public void setId(int id)
{
this.id = id;
}
}
How do I kill background processes / jobs when my shell script exits?
To clean up some mess, trap can be used. It can provide a list of stuff executed when a specific signal arrives:
trap "echo hello" SIGINT
but can also be used to execute something if the shell exits:
trap "killall background" EXIT
It's a builtin, so help trap will give you information (works with bash). If you only want to kill background jobs, you can do
trap 'kill $(jobs -p)' EXIT
Watch out to use single ', to prevent the shell from substituting the $() immediately.
finding first day of the month in python
You can use dateutil.rrule:
In [1]: from dateutil.rrule import *
In [2]: rrule(DAILY, bymonthday=1)[0].date()
Out[2]: datetime.date(2018, 10, 1)
In [3]: rrule(DAILY, bymonthday=1)[1].date()
Out[3]: datetime.date(2018, 11, 1)
What is code coverage and how do YOU measure it?
Code coverage is a measurement of how many lines/blocks/arcs of your code are executed while the automated tests are running.
Code coverage is collected by using a specialized tool to instrument the binaries to add tracing calls and run a full set of automated tests against the instrumented product. A good tool will give you not only the percentage of the code that is executed, but also will allow you to drill into the data and see exactly which lines of code were executed during a particular test.
Our team uses Magellan - an in-house set of code coverage tools. If you are a .NET shop, Visual Studio has integrated tools to collect code coverage. You can also roll some custom tools, like this article describes.
If you are a C++ shop, Intel has some tools that run for Windows and Linux, though I haven't used them. I've also heard there's the gcov tool for GCC, but I don't know anything about it and can't give you a link.
As to how we use it - code coverage is one of our exit criteria for each milestone. We have actually three code coverage metrics - coverage from unit tests (from the development team), scenario tests (from the test team) and combined coverage.
BTW, while code coverage is a good metric of how much testing you are doing, it is not necessarily a good metric of how well you are testing your product. There are other metrics you should use along with code coverage to ensure the quality.
CSS property to pad text inside of div
Padding is a way to add kind of a margin inside the Div.
Just Use
div { padding-left: 20px; }
And to mantain the size, you would have to -20px from the original width of the Div.
SEVERE: ContainerBase.addChild: start:org.apache.catalina.LifecycleException: Failed to start error
I had the same error statement following a "Failed to access resource" error message:
Command
#cat callflow-java-logger-1.log.0
Output
Dec 09, 2015 8:09:03 AM org.apache.catalina.loader.WebappLoader startInternal
SEVERE: LifecycleException
java.io.IOException: Failed to access resource /WEB-INF/lib/ojdbc14.jar
In my case the solution was changing the connector permissions
-rw------- 1 owner creator size date ojdbc14.jar
This file in question wasn't initially located at /WEB-INF/lib, which was probably due to how BIRT works. It can be tricky if you are dealing with a higher number of files.
Form/JavaScript not working on IE 11 with error DOM7011
I had a similar problem on Internet Explorer, and got the same error number. The culprit was an HTML comment. I know it sounds unbelievable, so here is the story.
I saw a series of 6 articles on the Internet. I liked them, so I decided to download the 6 Web-Pages and store them on my Hard Drive. At the top of each page, was a couple of HTML <a> Tags, that would allow you to go to the next article or the previous article. So I changed the href attribute to point to the next folder on my Hard Drive, instead of the next URL on the Internet.
After all of the links had been re-directed, the Browser refused to display any of the Web-Pages when I clicked on the Links. The message in the Console was the Error Number that was mentioned at the top of this page.
However, the real problem was a Comment. Whenever you download a Web-Page using Google Chrome, the Chrome Browser inserts a Comment at the very top of the page that includes the URL of the location that you got the Web-Page from. After I removed the Comment at the top of each one of the 6 Pages, all of the Links worked fine ( although I continued to get the same Error Message in the Console. )
How to call jQuery function onclick?
Please have a look at http://jsfiddle.net/2dJAN/59/
$("#submit").click(function () {
var url = $(location).attr('href');
$('#spn_url').html('<strong>' + url + '</strong>');
});
Page loaded over HTTPS but requested an insecure XMLHttpRequest endpoint
I had the same issue for my angular project, then I make it work in Chrome by changing the setting. Go to Chrome setting -->site setting -->Insecure content --> click add button of allow, then add your domain name [*.]XXXX.biz
Now problem will be solved.
Auto-fit TextView for Android
If you are looking for something easier:
public MyTextView extends TextView{
public void resize(String text, float textViewWidth, float textViewHeight) {
Paint p = new Paint();
Rect bounds = new Rect();
p.setTextSize(1);
p.getTextBounds(text, 0, text.length(), bounds);
float widthDifference = (textViewWidth)/bounds.width();
float heightDifference = (textViewHeight);
textSize = Math.min(widthDifference, heightDifference);
setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
}
Design DFA accepting binary strings divisible by a number 'n'
Below, I have written an answer for n equals to 5, but you can apply same approach to draw DFAs for any value of n and 'any positional number system' e.g binary, ternary...
First lean the term 'Complete DFA', A DFA defined on complete domain in d:Q × S?Q is called 'Complete DFA'. In other words we can say; in transition diagram of complete DFA there is no missing edge (e.g. from each state in Q there is one outgoing edge present for every language symbol in S). Note: Sometime we define partial DFA as d ? Q × S?Q (Read: How does “d:Q × S?Q” read in the definition of a DFA).
Design DFA accepting Binary numbers divisible by number 'n':
Step-1: When you divide a number ? by n then reminder can be either 0, 1, ..., (n - 2) or (n - 1). If remainder is 0 that means ? is divisible by n otherwise not. So, in my DFA there will be a state qr that would be corresponding to a remainder value r, where 0 <= r <= (n - 1), and total number of states in DFA is n.
After processing a number string ? over S, the end state is qr implies that ? % n => r (% reminder operator).
In any automata, the purpose of a state is like memory element. A state in an atomata stores some information like fan's switch that can tell whether the fan is in 'off' or in 'on' state. For n = 5, five states in DFA corresponding to five reminder information as follows:
- State q0 reached if reminder is 0. State q0 is the final state(accepting state). It is also an initial state.
- State q1 reaches if reminder is 1, a non-final state.
- State q2 if reminder is 2, a non-final state.
- State q3 if reminder is 3, a non-final state.
- State q4 if reminder is 4, a non-final state.
Using above information, we can start drawing transition diagram TD of five states as follows:
Figure-1
So, 5 states for 5 remainder values. After processing a string ? if end-state becomes q0 that means decimal equivalent of input string is divisible by 5. In above figure q0 is marked final state as two concentric circle.
Additionally, I have defined a transition rule d:(q0, 0)?q0 as a self loop for symbol '0' at state q0, this is because decimal equivalent of any string consist of only '0' is 0 and 0 is a divisible by n.
Step-2: TD above is incomplete; and can only process strings of '0's. Now add some more edges so that it can process subsequent number's strings. Check table below, shows new transition rules those can be added next step:
+-------------------------------------+ ¦Number¦Binary¦Remainder(%5)¦End-state¦ +------+------+-------------+---------¦ ¦One ¦1 ¦1 ¦q1 ¦ +------+------+-------------+---------¦ ¦Two ¦10 ¦2 ¦q2 ¦ +------+------+-------------+---------¦ ¦Three ¦11 ¦3 ¦q3 ¦ +------+------+-------------+---------¦ ¦Four ¦100 ¦4 ¦q4 ¦ +-------------------------------------+
- To process binary string
'1'there should be a transition rule d:(q0, 1)?q1 - Two:- binary representation is
'10', end-state should be q2, and to process'10', we just need to add one more transition rule d:(q1, 0)?q2
Path: ?(q0)-1?(q1)-0?(q2) - Three:- in binary it is
'11', end-state is q3, and we need to add a transition rule d:(q1, 1)?q3
Path: ?(q0)-1?(q1)-1?(q3) - Four:- in binary
'100', end-state is q4. TD already processes prefix string'10'and we just need to add a new transition rule d:(q2, 0)?q4
Path: ?(q0)-1?(q1)-0?(q2)-0?(q4)
Figure-2
Step-3: Five = 101
Above transition diagram in figure-2 is still incomplete and there are many missing edges, for an example no transition is defined for d:(q2, 1)-?. And the rule should be present to process strings like '101'.
Because '101' = 5 is divisible by 5, and to accept '101' I will add d:(q2, 1)?q0 in above figure-2.
Path: ?(q0)-1?(q1)-0?(q2)-1?(q0)
with this new rule, transition diagram becomes as follows:
Figure-3
Below in each step I pick next subsequent binary number to add a missing edge until I get TD as a 'complete DFA'.
Step-4: Six = 110.
We can process '11' in present TD in figure-3 as: ?(q0)-11?(q3) -0?(?). Because 6 % 5 = 1 this means to add one rule d:(q3, 0)?q1.
Figure-4
Step-5: Seven = 111
+--------------------------------------------------------------+ ¦Number¦Binary¦Remainder(%5)¦End-state¦ Path ¦ Add ¦ +------+------+-------------+---------+------------+-----------¦ ¦Seven ¦111 ¦7 % 5 = 2 ¦q2 ¦ q0-11?q3 ¦ q3-1?q2 ¦ +--------------------------------------------------------------+
Figure-5
Step-6: Eight = 1000
+----------------------------------------------------------+ ¦Number¦Binary¦Remainder(%5)¦End-state¦ Path ¦ Add ¦ +------+------+-------------+---------+----------+---------¦ ¦Eight ¦1000 ¦8 % 5 = 3 ¦q3 ¦q0-100?q4 ¦ q4-0?q3 ¦ +----------------------------------------------------------+
Figure-6
Step-7: Nine = 1001
+----------------------------------------------------------+ ¦Number¦Binary¦Remainder(%5)¦End-state¦ Path ¦ Add ¦ +------+------+-------------+---------+----------+---------¦ ¦Nine ¦1001 ¦9 % 5 = 4 ¦q4 ¦q0-100?q4 ¦ q4-1?q4 ¦ +----------------------------------------------------------+
Figure-7
In TD-7, total number of edges are 10 == Q × S = 5 × 2. And it is a complete DFA that can accept all possible binary strings those decimal equivalent is divisible by 5.
Design DFA accepting Ternary numbers divisible by number n:
Step-1 Exactly same as for binary, use figure-1.
Step-2 Add Zero, One, Two
+------------------------------------------------------+ ¦Decimal¦Ternary¦Remainder(%5)¦End-state¦ Add ¦ +-------+-------+-------------+---------+--------------¦ ¦Zero ¦0 ¦0 ¦q0 ¦ d:(q0,0)?q0 ¦ +-------+-------+-------------+---------+--------------¦ ¦One ¦1 ¦1 ¦q1 ¦ d:(q0,1)?q1 ¦ +-------+-------+-------------+---------+--------------¦ ¦Two ¦2 ¦2 ¦q2 ¦ d:(q0,2)?q3 ¦ +------------------------------------------------------+
Figure-8
Step-3 Add Three, Four, Five
+-----------------------------------------------------+ ¦Decimal¦Ternary¦Remainder(%5)¦End-state¦ Add ¦ +-------+-------+-------------+---------+-------------¦ ¦Three ¦10 ¦3 ¦q3 ¦ d:(q1,0)?q3 ¦ +-------+-------+-------------+---------+-------------¦ ¦Four ¦11 ¦4 ¦q4 ¦ d:(q1,1)?q4 ¦ +-------+-------+-------------+---------+-------------¦ ¦Five ¦12 ¦0 ¦q0 ¦ d:(q1,2)?q0 ¦ +-----------------------------------------------------+
Figure-9
Step-4 Add Six, Seven, Eight
+-----------------------------------------------------+ ¦Decimal¦Ternary¦Remainder(%5)¦End-state¦ Add ¦ +-------+-------+-------------+---------+-------------¦ ¦Six ¦20 ¦1 ¦q1 ¦ d:(q2,0)?q1 ¦ +-------+-------+-------------+---------+-------------¦ ¦Seven ¦21 ¦2 ¦q2 ¦ d:(q2,1)?q2 ¦ +-------+-------+-------------+---------+-------------¦ ¦Eight ¦22 ¦3 ¦q3 ¦ d:(q2,2)?q3 ¦ +-----------------------------------------------------+
Figure-10
Step-5 Add Nine, Ten, Eleven
+-----------------------------------------------------+ ¦Decimal¦Ternary¦Remainder(%5)¦End-state¦ Add ¦ +-------+-------+-------------+---------+-------------¦ ¦Nine ¦100 ¦4 ¦q4 ¦ d:(q3,0)?q4 ¦ +-------+-------+-------------+---------+-------------¦ ¦Ten ¦101 ¦0 ¦q0 ¦ d:(q3,1)?q0 ¦ +-------+-------+-------------+---------+-------------¦ ¦Eleven ¦102 ¦1 ¦q1 ¦ d:(q3,2)?q1 ¦ +-----------------------------------------------------+
Figure-11
Step-6 Add Twelve, Thirteen, Fourteen
+------------------------------------------------------+ ¦Decimal ¦Ternary¦Remainder(%5)¦End-state¦ Add ¦ +--------+-------+-------------+---------+-------------¦ ¦Twelve ¦110 ¦2 ¦q2 ¦ d:(q4,0)?q2 ¦ +--------+-------+-------------+---------+-------------¦ ¦Thirteen¦111 ¦3 ¦q3 ¦ d:(q4,1)?q3 ¦ +--------+-------+-------------+---------+-------------¦ ¦Fourteen¦112 ¦4 ¦q4 ¦ d:(q4,2)?q4 ¦ +------------------------------------------------------+
Figure-12
Total number of edges in transition diagram figure-12 are 15 = Q × S = 5 * 3 (a complete DFA). And this DFA can accept all strings consist over {0, 1, 2} those decimal equivalent is divisible by 5.
If you notice at each step, in table there are three entries because at each step I add all possible outgoing edge from a state to make a complete DFA (and I add an edge so that qr state gets for remainder is r)!
To add further, remember union of two regular languages are also a regular. If you need to design a DFA that accepts binary strings those decimal equivalent is either divisible by 3 or 5, then draw two separate DFAs for divisible by 3 and 5 then union both DFAs to construct target DFA (for 1 <= n <= 10 your have to union 10 DFAs).
If you are asked to draw DFA that accepts binary strings such that decimal equivalent is divisible by 5 and 3 both then you are looking for DFA of divisible by 15 ( but what about 6 and 8?).
Note: DFAs drawn with this technique will be minimized DFA only when there is no common factor between number n and base e.g. there is no between 5 and 2 in first example, or between 5 and 3 in second example, hence both DFAs constructed above are minimized DFAs. If you are interested to read further about possible mini states for number n and base b read paper: Divisibility and State Complexity.
below I have added a Python script, I written it for fun while learning Python library pygraphviz. I am adding it I hope it can be helpful for someone in someway.
Design DFA for base 'b' number strings divisible by number 'n':
So we can apply above trick to draw DFA to recognize number strings in any base 'b' those are divisible a given number 'n'. In that DFA total number of states will be n (for n remainders) and number of edges should be equal to 'b' * 'n' — that is complete DFA: 'b' = number of symbols in language of DFA and 'n' = number of states.
Using above trick, below I have written a Python Script to Draw DFA for input base and number. In script, function divided_by_N populates DFA's transition rules in base * number steps. In each step-num, I convert num into number string num_s using function baseN(). To avoid processing each number string, I have used a temporary data-structure lookup_table. In each step, end-state for number string num_s is evaluated and stored in lookup_table to use in next step.
For transition graph of DFA, I have written a function draw_transition_graph using Pygraphviz library (very easy to use). To use this script you need to install graphviz. To add colorful edges in transition diagram, I randomly generates color codes for each symbol get_color_dict function.
#!/usr/bin/env python
import pygraphviz as pgv
from pprint import pprint
from random import choice as rchoice
def baseN(n, b, syms="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
""" converts a number `n` into base `b` string """
return ((n == 0) and syms[0]) or (
baseN(n//b, b, syms).lstrip(syms[0]) + syms[n % b])
def divided_by_N(number, base):
"""
constructs DFA that accepts given `base` number strings
those are divisible by a given `number`
"""
ACCEPTING_STATE = START_STATE = '0'
SYMBOL_0 = '0'
dfa = {
str(from_state): {
str(symbol): 'to_state' for symbol in range(base)
}
for from_state in range(number)
}
dfa[START_STATE][SYMBOL_0] = ACCEPTING_STATE
# `lookup_table` keeps track: 'number string' -->[dfa]--> 'end_state'
lookup_table = { SYMBOL_0: ACCEPTING_STATE }.setdefault
for num in range(number * base):
end_state = str(num % number)
num_s = baseN(num, base)
before_end_state = lookup_table(num_s[:-1], START_STATE)
dfa[before_end_state][num_s[-1]] = end_state
lookup_table(num_s, end_state)
return dfa
def symcolrhexcodes(symbols):
"""
returns dict of color codes mapped with alphabets symbol in symbols
"""
return {
symbol: '#'+''.join([
rchoice("8A6C2B590D1F4E37") for _ in "FFFFFF"
])
for symbol in symbols
}
def draw_transition_graph(dfa, filename="filename"):
ACCEPTING_STATE = START_STATE = '0'
colors = symcolrhexcodes(dfa[START_STATE].keys())
# draw transition graph
tg = pgv.AGraph(strict=False, directed=True, decorate=True)
for from_state in dfa:
for symbol, to_state in dfa[from_state].iteritems():
tg.add_edge("Q%s"%from_state, "Q%s"%to_state,
label=symbol, color=colors[symbol],
fontcolor=colors[symbol])
# add intial edge from an invisible node!
tg.add_node('null', shape='plaintext', label='start')
tg.add_edge('null', "Q%s"%START_STATE,)
# make end acception state as 'doublecircle'
tg.get_node("Q%s"%ACCEPTING_STATE).attr['shape'] = 'doublecircle'
tg.draw(filename, prog='circo')
tg.close()
def print_transition_table(dfa):
print("DFA accepting number string in base '%(base)s' "
"those are divisible by '%(number)s':" % {
'base': len(dfa['0']),
'number': len(dfa),})
pprint(dfa)
if __name__ == "__main__":
number = input ("Enter NUMBER: ")
base = input ("Enter BASE of number system: ")
dfa = divided_by_N(number, base)
print_transition_table(dfa)
draw_transition_graph(dfa)
Execute it:
~/study/divide-5/script$ python script.py
Enter NUMBER: 5
Enter BASE of number system: 4
DFA accepting number string in base '4' those are divisible by '5':
{'0': {'0': '0', '1': '1', '2': '2', '3': '3'},
'1': {'0': '4', '1': '0', '2': '1', '3': '2'},
'2': {'0': '3', '1': '4', '2': '0', '3': '1'},
'3': {'0': '2', '1': '3', '2': '4', '3': '0'},
'4': {'0': '1', '1': '2', '2': '3', '3': '4'}}
~/study/divide-5/script$ ls
script.py filename.png
~/study/divide-5/script$ display filename
Output:
DFA accepting number strings in base 4 those are divisible by 5
Similarly, enter base = 4 and number = 7 to generate - dfa accepting number string in base '4' those are divisible by '7'
Btw, try changing filename to .png or .jpeg.
References those I use to write this script:
➊ Function baseN from "convert integer to a string in a given numeric base in python"
➋ To install "pygraphviz": "Python does not see pygraphviz"
➌ To learn use of Pygraphviz: "Python-FSM"
➍ To generate random hex color codes for each language symbol: "How would I make a random hexdigit code generator using .join and for loops?"
FileSystemWatcher Changed event is raised twice
Here is a new solution you can try. Works well for me. In the event handler for the changed event programmatically remove the handler from the designer output a message if desired then programmatically add the handler back. example:
public void fileSystemWatcher1_Changed( object sender, System.IO.FileSystemEventArgs e )
{
fileSystemWatcher1.Changed -= new System.IO.FileSystemEventHandler( fileSystemWatcher1_Changed );
MessageBox.Show( "File has been uploaded to destination", "Success!" );
fileSystemWatcher1.Changed += new System.IO.FileSystemEventHandler( fileSystemWatcher1_Changed );
}
Function in JavaScript that can be called only once
Reusable invalidate function which works with setInterval:
var myFunc = function (){
if (invalidate(arguments)) return;
console.log('called once and never again!'); // your stuff here
};
const invalidate = function(a) {
var fired = a.callee.fired;
a.callee.fired = true;
return fired;
}
setInterval(myFunc, 1000);
Try it on JSBin: https://jsbin.com/vicipar/edit?js,console
Variation of answer from Bunyk
Replace multiple strings with multiple other strings
Just in case someone is wondering why the original poster's solution is not working:
var str = "I have a cat, a dog, and a goat.";
str = str.replace(/cat/gi, "dog");
// now str = "I have a dog, a dog, and a goat."
str = str.replace(/dog/gi, "goat");
// now str = "I have a goat, a goat, and a goat."
str = str.replace(/goat/gi, "cat");
// now str = "I have a cat, a cat, and a cat."
Using regular expressions to do mass replace in Notepad++ and Vim
Having the same problem (with jQuery " done..." strings), but only in Notepad++, I asked, received good friendly replies (that made me understand what I had missed), then spent the time to build a detailed step-by-step explanation, see Finding Line Beginning using Regular expression in Notepad++
Versailles, Tue 27 Apr 2010 22:53:25 +0200
SQL SERVER: Get total days between two dates
PRINT DATEDIFF(DAY, '1/1/2011', '3/1/2011') will give you what you're after.
This gives the number of times the midnight boundary is crossed between the two dates. You may decide to need to add one to this if you're including both dates in the count - or subtract one if you don't want to include either date.
Alternate output format for psql
you can use the zenity to displays the query output as html table.
first implement bash script with following code:
cat > '/tmp/sql.op'; zenity --text-info --html --filename='/tmp/sql.op';
save it like mypager.sh
Then export the environment variable PAGER by set full path of the script as value.
for example:- export PAGER='/path/mypager.sh'
Then login to the psql program then execute the command \H
And finally execute any query,the tabled output will displayed in the zenity in html table format.
Chrome Dev Tools - Modify javascript and reload
This is a bit of a work around, but one way you can achieve this is by adding a breakpoint at the start of the javascript file or block you want to manipulate.
Then when you reload, the debugger will pause on that breakpoint, and you can make any changes you want to the source, save the file and then run the debugger through the modified code.
But as everyone has said, next reload the changes will be gone - at least it let's you run some slightly modified JS client side.
Bringing a subview to be in front of all other views
In c#, View.BringSubviewToFront(childView); YourView.Layer.ZPosition = 1; both should work.
How to change context root of a dynamic web project in Eclipse?
In the java project, open .settings folder. there locate the file named "org.eclipse.wst.common.component" . Change tag <wb-module deploy-name="NEW_NAME"> .
Also you may want to change context root in project properties
How to declare a variable in a template in Angular
It is much simpler, no need for anything additional. In my example I declare variable "open" and then use it.
<mat-accordion class="accord-align" #open>
<mat-expansion-panel hideToggle="true" (opened)="open.value=true" (closed)="open.value=false">
<mat-expansion-panel-header>
<span class="accord-title">Review Policy Summary</span>
<span class="spacer"></span>
<a *ngIf="!open.value" class="f-accent">SHOW</a>
<a *ngIf="open.value" class="f-accent">HIDE</a>
</mat-expansion-panel-header>
<mat-divider></mat-divider>
<!-- Quote Details Component -->
<quote-details [quote]="quote"></quote-details>
</mat-expansion-panel>
</mat-accordion>
how to create and call scalar function in sql server 2008
Or you can simply use PRINT command instead of SELECT command. Try this,
PRINT dbo.fn_HomePageSlider(9, 3025)
Google Maps API OVER QUERY LIMIT per second limit
The geocoder has quota and rate limits. From experience, you can geocode ~10 locations without hitting the query limit (the actual number probably depends on server loading). The best solution is to delay when you get OVER_QUERY_LIMIT errors, then retry. See these similar posts:
How to use double or single brackets, parentheses, curly braces
The difference between test, [ and [[ is explained in great details in the BashFAQ.
To cut a long story short: test implements the old, portable syntax of the command. In almost all shells (the oldest Bourne shells are the exception), [ is a synonym for test (but requires a final argument of ]). Although all modern shells have built-in implementations of [, there usually still is an external executable of that name, e.g. /bin/[.
[[ is a new improved version of it, which is a keyword, not a program. This has beneficial effects on the ease of use, as shown below. [[ is understood by KornShell and BASH (e.g. 2.03), but not by the older POSIX or BourneShell.
And the conclusion:
When should the new test command [[ be used, and when the old one [? If portability to the BourneShell is a concern, the old syntax should be used. If on the other hand the script requires BASH or KornShell, the new syntax is much more flexible.
Pandas How to filter a Series
If you like a chained operation, you can also use compress function:
test = pd.Series({
383: 3.000000,
663: 1.000000,
726: 1.000000,
737: 9.000000,
833: 8.166667
})
test.compress(lambda x: x != 1)
# 383 3.000000
# 737 9.000000
# 833 8.166667
# dtype: float64
Input from the keyboard in command line application
Swift 5 : If you continuously want input from keyboard , without ending the program, like a stream of input, Use below steps:
Create new project of type comnnad line tool
Add below code in main.swift file:
var inputArray = [String]() while let input = readLine() { guard input != "quit" else { break } inputArray.append(input) print("You entered: \(input)") print(inputArray) print("Enter a word:") }- RunThe project and click the executable under Products folder in Xcode and open in finder
- Double click the executable to open it.
- Now enter your Inputs. Terminal will look something like this:
Add shadow to custom shape on Android
I would suggest a small improvement to Bruce's solution which is to prevent overdrawing the same shape on top of each other and to simply use stroke instead of solid. It would look like this:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Drop Shadow Stack -->
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#02000000" android:width="1dp" />
<corners android:radius="8dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#05000000" android:width="1dp" />
<corners android:radius="7dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#10000000" android:width="1dp" />
<corners android:radius="6dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#15000000" android:width="1dp" />
<corners android:radius="5dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#20000000" android:width="1dp" />
<corners android:radius="4dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#25000000" android:width="1dp" />
<corners android:radius="3dp" />
</shape>
</item>
<item>
<shape>
<padding android:top="1dp" android:right="1dp" android:bottom="1dp" android:left="1dp" />
<stroke android:color="#30000000" android:width="1dp" />
<corners android:radius="3dp" />
</shape>
</item>
<!-- Background -->
<item>
<shape>
<solid android:color="#FFF" />
<corners android:radius="3dp" />
</shape>
</item>
</layer-list>
Lastly I wanted to point out for people who would like a shadow in a specific direction that all you have to do is set the top, bottom, left or right to 0dp (for a solid line) or -1dp (for nothing)
How to Compare two strings using a if in a stored procedure in sql server 2008?
declare @temp as varchar
set @temp='Measure'
if(@temp = 'Measure')
Select Measure from Measuretable
else
Select OtherMeasure from Measuretable
Escape double quote in grep
The problem is that you aren't correctly escaping the input string, try:
echo "\"member\":\"time\"" | grep -e "member\""
Alternatively, you can use unescaped double quotes within single quotes:
echo '"member":"time"' | grep -e 'member"'
It's a matter of preference which you find clearer, although the second approach prevents you from nesting your command within another set of single quotes (e.g. ssh 'cmd').
Best /Fastest way to read an Excel Sheet into a DataTable?
You can use OpenXml SDK for *.xlsx files. It works very quickly. I made simple C# IDataReader implementation for this sdk. See here. Now you can easy read excel file to DataTable and you can import excel file to sql server database (use SqlBulkCopy). ExcelDataReader reads very fast. On my machine 10000 records less 3 sec and 60000 less 8 sec.
Read to DataTable example:
class Program
{
static void Main(string[] args)
{
var dt = new DataTable();
using (var reader = new ExcelDataReader(@"data.xlsx"))
dt.Load(reader);
Console.WriteLine("done: " + dt.Rows.Count);
Console.ReadKey();
}
}
Convert string to Python class object?
import sys
import types
def str_to_class(field):
try:
identifier = getattr(sys.modules[__name__], field)
except AttributeError:
raise NameError("%s doesn't exist." % field)
if isinstance(identifier, (types.ClassType, types.TypeType)):
return identifier
raise TypeError("%s is not a class." % field)
This accurately handles both old-style and new-style classes.
Where is localhost folder located in Mac or Mac OS X?
If you use apachectl to start or stop, then you can find it with this command
apachectl -t -D DUMP_RUN_CFG
How do I change the language of moment.js?
I'm using angular2-moment, but usage must be similar.
import { MomentModule } from "angular2-moment";
import moment = require("moment");
export class AppModule {
constructor() {
moment.locale('ru');
}
}
REST URI convention - Singular or plural name of resource while creating it
See Google's API Design Guide: Resource Names for another take on naming resources.
The guide requires collections to be named with plurals.
|--------------------------+---------------+-------------------+---------------+--------------|
| API Service Name | Collection ID | Resource ID | Collection ID | Resource ID |
|--------------------------+---------------+-------------------+---------------+--------------|
| //mail.googleapis.com | /users | /[email protected] | /settings | /customFrom |
| //storage.googleapis.com | /buckets | /bucket-id | /objects | /object-id |
|--------------------------+---------------+-------------------+---------------+--------------|
It's worthwhile reading if you're thinking about this subject.
How can I format decimal property to currency?
You can now use string interpolation and expression bodied properties in C# 6.
private decimal _amount;
public string FormattedAmount => $"{_amount:C}";
Creating instance list of different objects
You could create a list of Object like List<Object> list = new ArrayList<Object>(). As all classes implementation extends implicit or explicit from java.lang.Object class, this list can hold any object, including instances of Employee, Integer, String etc.
When you retrieve an element from this list, you will be retrieving an Object and no longer an Employee, meaning you need to perform a explicit cast in this case as follows:
List<Object> list = new ArrayList<Object>();
list.add("String");
list.add(Integer.valueOf(1));
list.add(new Employee());
Object retrievedObject = list.get(2);
Employee employee = (Employee)list.get(2); // explicit cast
How to determine tables size in Oracle
Here is a query, you can run it in SQL Developer (or SQL*Plus):
SELECT DS.TABLESPACE_NAME, SEGMENT_NAME, ROUND(SUM(DS.BYTES) / (1024 * 1024)) AS MB
FROM DBA_SEGMENTS DS
WHERE SEGMENT_NAME IN (SELECT TABLE_NAME FROM DBA_TABLES)
GROUP BY DS.TABLESPACE_NAME,
SEGMENT_NAME;
Is Python interpreted, or compiled, or both?
It really depends on the implementation of the language being used! There is a common step in any implementation, though: your code is first compiled (translated) to intermediate code - something between your code and machine (binary) code - called bytecode (stored into .pyc files). Note that this is a one-time step that will not be repeated unless you modify your code.
And that bytecode is executed every time you are running the program. How? Well, when we run the program, this bytecode (inside a .pyc file) is passed as input to a Virtual Machine (VM)1 - the runtime engine allowing our programs to be executed - that executes it.
Depending on the language implementation, the VM will either interpret the bytecode (in the case of CPython2 implementation) or JIT-compile3 it (in the case of PyPy4 implementation).
Notes:
1 an emulation of a computer system
2 a bytecode interpreter; the reference implementation of the language, written in C and Python - most widely used
3 compilation that is being done during the execution of a program (at runtime)
4 a bytecode JIT compiler; an alternative implementation to CPython, written in RPython (Restricted Python) - often runs faster than CPython