jQuery UI Tabs - How to Get Currently Selected Tab Index
If you need to get the tab index from outside the context of a tabs event, use this:
function getSelectedTabIndex() {
return $("#TabList").tabs('option', 'selected');
}
Update: From version 1.9 'selected' is changed to 'active'
$("#TabList").tabs('option', 'active')
jQuery - trapping tab select event
This post shows a complete working HTML file as an example of triggering code to run when a tab is clicked. The .on() method is now the way that jQuery suggests that you handle events.
To make something happen when the user clicks a tab can be done by giving the list element an id.
<li id="list">
Then referring to the id.
$("#list").on("click", function() {
alert("Tab Clicked!");
});
Make sure that you are using a current version of the jQuery api. Referencing the jQuery api from Google, you can get the link here:
https://developers.google.com/speed/libraries/devguide#jquery
Here is a complete working copy of a tabbed page that triggers an alert when the horizontal tab 1 is clicked.
<!-- This HTML doc is modified from an example by: -->
<!-- http://keith-wood.name/uiTabs.html#tabs-nested -->
<head>
<meta charset="utf-8">
<title>TabDemo</title>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.23/themes/south-street/jquery-ui.css">
<style>
pre {
clear: none;
}
div.showCode {
margin-left: 8em;
}
.tabs {
margin-top: 0.5em;
}
.ui-tabs {
padding: 0.2em;
background: url(http://code.jquery.com/ui/1.8.23/themes/south-street/images/ui-bg_highlight-hard_100_f5f3e5_1x100.png) repeat-x scroll 50% top #F5F3E5;
border-width: 1px;
}
.ui-tabs .ui-tabs-nav {
padding-left: 0.2em;
background: url(http://code.jquery.com/ui/1.8.23/themes/south-street/images/ui-bg_gloss-wave_100_ece8da_500x100.png) repeat-x scroll 50% 50% #ECE8DA;
border: 1px solid #D4CCB0;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
}
.ui-tabs-nav .ui-state-active {
border-color: #D4CCB0;
}
.ui-tabs .ui-tabs-panel {
background: transparent;
border-width: 0px;
}
.ui-tabs-panel p {
margin-top: 0em;
}
#minImage {
margin-left: 6.5em;
}
#minImage img {
padding: 2px;
border: 2px solid #448844;
vertical-align: bottom;
}
#tabs-nested > .ui-tabs-panel {
padding: 0em;
}
#tabs-nested-left {
position: relative;
padding-left: 6.5em;
}
#tabs-nested-left .ui-tabs-nav {
position: absolute;
left: 0.25em;
top: 0.25em;
bottom: 0.25em;
width: 6em;
padding: 0.2em 0 0.2em 0.2em;
}
#tabs-nested-left .ui-tabs-nav li {
right: 1px;
width: 100%;
border-right: none;
border-bottom-width: 1px !important;
-moz-border-radius: 4px 0px 0px 4px;
-webkit-border-radius: 4px 0px 0px 4px;
border-radius: 4px 0px 0px 4px;
overflow: hidden;
}
#tabs-nested-left .ui-tabs-nav li.ui-tabs-selected,
#tabs-nested-left .ui-tabs-nav li.ui-state-active {
border-right: 1px solid transparent;
}
#tabs-nested-left .ui-tabs-nav li a {
float: right;
width: 100%;
text-align: right;
}
#tabs-nested-left > div {
height: 10em;
overflow: auto;
}
</pre>
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.23/jquery-ui.min.js"></script>
<script>
$(function() {
$('article.tabs').tabs();
});
</script>
</head>
<body>
<header role="banner">
<h1>jQuery UI Tabs Styling</h1>
</header>
<section>
<article id="tabs-nested" class="tabs">
<script>
$(document).ready(function(){
$("#ForClick").on("click", function() {
alert("Tab Clicked!");
});
});
</script>
<ul>
<li id="ForClick"><a href="#tabs-nested-1">First</a></li>
<li><a href="#tabs-nested-2">Second</a></li>
<li><a href="#tabs-nested-3">Third</a></li>
</ul>
<div id="tabs-nested-1">
<article id="tabs-nested-left" class="tabs">
<ul>
<li><a href="#tabs-nested-left-1">First</a></li>
<li><a href="#tabs-nested-left-2">Second</a></li>
<li><a href="#tabs-nested-left-3">Third</a></li>
</ul>
<div id="tabs-nested-left-1">
<p>Nested tabs, horizontal then vertical.</p>
<form action="/sign" method="post">
<div><textarea name="content" rows="5" cols="100"></textarea></div>
<div><input type="submit" value="Sign Guestbook"></div>
</form>
</div>
<div id="tabs-nested-left-2">
<p>Nested Left Two</p>
</div>
<div id="tabs-nested-left-3">
<p>Nested Left Three</p>
</div>
</article>
</div>
<div id="tabs-nested-2">
<p>Tab Two Main</p>
</div>
<div id="tabs-nested-3">
<p>Tab Three Main</p>
</div>
</article>
</section>
</body>
</html>
Rounding up to next power of 2
A variant of @YannDroneaud answer valid for x==1, only for x86 plateforms, compilers, gcc or clang:
__attribute__ ((const))
static inline uint32_t p2(uint32_t x)
{
#if 0
assert(x > 0);
assert(x <= ((UINT32_MAX/2) + 1));
#endif
int clz;
uint32_t xm1 = x-1;
asm(
"lzcnt %1,%0"
:"=r" (clz)
:"rm" (xm1)
:"cc"
);
return 1 << (32 - clz);
}
How to get CSS to select ID that begins with a string (not in Javascript)?
Use the attribute selector
[id^=product]{property:value}
Generating random integer from a range
int RandU(int nMin, int nMax)
{
return nMin + (int)((double)rand() / (RAND_MAX+1) * (nMax-nMin+1));
}
This is a mapping of 32768 integers to (nMax-nMin+1) integers. The mapping will be quite good if (nMax-nMin+1) is small (as in your requirement). Note however that if (nMax-nMin+1) is large, the mapping won't work (For example - you can't map 32768 values to 30000 values with equal probability). If such ranges are needed - you should use a 32-bit or 64-bit random source, instead of the 15-bit rand(), or ignore rand() results which are out-of-range.
Why is Maven downloading the maven-metadata.xml every time?
I suppose because you didn't specify plugin version so it triggers the download of associated metadata in order to get the last one.
Otherwise did you try to force local repo usage using -o ?
How to change the datetime format in pandas
The below code worked for me instead of the previous one - try it out !
df['DOB']=pd.to_datetime(df['DOB'].astype(str), format='%m/%d/%Y')
Visual Studio 2015 doesn't have cl.exe
In Visual Studio 2019 you can find cl.exe inside
32-BIT : C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx86\x86
64-BIT : C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.20.27508\bin\Hostx64\x64
Before trying to compile either run vcvars32 for 32-Bit compilation or vcvars64 for 64-Bit.
32-BIT : "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
64-BIT : "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
If you can't find the file or the directory, try going to C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC and see if you can find a folder with a version number. If you can't, then you probably haven't installed C++ through the Visual Studio Installation yet.
Use of exit() function
Write header file #include<process.h> and replace exit(); with exit(0);. This will definitely work in Turbo C; for other compilers I don't know.
How do I count the number of rows and columns in a file using bash?
head -1 file.tsv |head -1 train.tsv |tr '\t' '\n' |wc -l
take the first line, change tabs (or you can use ',' instead of '\t' for commas), count the number of lines.
PHP If Statement with Multiple Conditions
Dont know, why you want to use &&. Theres an easier solution
echo in_array($var, array('abc', 'def', 'hij', 'klm', 'nop'))
? 'yes'
: 'no';
Custom ImageView with drop shadow
I've built upon the answer above - https://stackoverflow.com/a/11155031/2060486 - to create a shadow around ALL sides..
private static final int GRAY_COLOR_FOR_SHADE = Color.argb(50, 79, 79, 79);
// this method takes a bitmap and draws around it 4 rectangles with gradient to create a
// shadow effect.
public static Bitmap addShadowToBitmap(Bitmap origBitmap) {
int shadowThickness = 13; // can be adjusted as needed
int bmpOriginalWidth = origBitmap.getWidth();
int bmpOriginalHeight = origBitmap.getHeight();
int bigW = bmpOriginalWidth + shadowThickness * 2; // getting dimensions for a bigger bitmap with margins
int bigH = bmpOriginalHeight + shadowThickness * 2;
Bitmap containerBitmap = Bitmap.createBitmap(bigW, bigH, Bitmap.Config.ARGB_8888);
Bitmap copyOfOrigBitmap = Bitmap.createScaledBitmap(origBitmap, bmpOriginalWidth, bmpOriginalHeight, false);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
Canvas canvas = new Canvas(containerBitmap); // drawing the shades on the bigger bitmap
//right shade - direction of gradient is positive x (width)
Shader rightShader = new LinearGradient(bmpOriginalWidth, 0, bigW, 0, GRAY_COLOR_FOR_SHADE,
Color.TRANSPARENT, Shader.TileMode.CLAMP);
paint.setShader(rightShader);
canvas.drawRect(bigW - shadowThickness, shadowThickness, bigW, bigH - shadowThickness, paint);
//bottom shade - direction is positive y (height)
Shader bottomShader = new LinearGradient(0, bmpOriginalHeight, 0, bigH, GRAY_COLOR_FOR_SHADE,
Color.TRANSPARENT, Shader.TileMode.CLAMP);
paint.setShader(bottomShader);
canvas.drawRect(shadowThickness, bigH - shadowThickness, bigW - shadowThickness, bigH, paint);
//left shade - direction is negative x
Shader leftShader = new LinearGradient(shadowThickness, 0, 0, 0, GRAY_COLOR_FOR_SHADE,
Color.TRANSPARENT, Shader.TileMode.CLAMP);
paint.setShader(leftShader);
canvas.drawRect(0, shadowThickness, shadowThickness, bigH - shadowThickness, paint);
//top shade - direction is negative y
Shader topShader = new LinearGradient(0, shadowThickness, 0, 0, GRAY_COLOR_FOR_SHADE,
Color.TRANSPARENT, Shader.TileMode.CLAMP);
paint.setShader(topShader);
canvas.drawRect(shadowThickness, 0, bigW - shadowThickness, shadowThickness, paint);
// starting to draw bitmap not from 0,0 to get margins for shade rectangles
canvas.drawBitmap(copyOfOrigBitmap, shadowThickness, shadowThickness, null);
return containerBitmap;
}
Change the color in the const as you see fit.
How to use Google fonts in React.js?
In some sort of main or first loading CSS file, just do:
@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:regular,bold,italic&subset=latin,latin-ext');
You don't need to wrap in any sort of @font-face, etc. the response you get back from Google's API is ready to go and lets you use font families like normal.
Then in your main React app JavaScript, at the top put something like:
import './assets/css/fonts.css';
What I did actually was made an app.css that imported a fonts.css with a few font imports. Simply for organization (now I know where all my fonts are). The important thing to remember is that you import the fonts first.
Keep in mind that any component you import to your React app should be imported after the style import. Especially if those components also import their own styles. This way you can be sure of the ordering of styles. This is why it's best to import fonts at the top of your main file (don't forget to check your final bundled CSS file to double check if you're having trouble).
There's a few options you can pass the Google Font API to be more efficient when loading fonts, etc. See official documentation: Get Started with the Google Fonts API
Edit, note: If you are dealing with an "offline" application, then you may indeed need to download the fonts and load through Webpack.
Setting the Textbox read only property to true using JavaScript
I find that document.getElementById('textbox-id').readOnly=true sometimes doesn't work reliably.
Instead, try:
document.getElementById('textbox-id').setAttribute('readonly', 'readonly') and
document.getElementById('textbox-id').removeAttribute('readonly').
A little verbose but it seems to be dependable.
What does the "More Columns than Column Names" error mean?
This error can get thrown if your data frame has sf geometry columns.
Why do multiple-table joins produce duplicate rows?
This might sound like a really basic "DUH" answer, but make sure that the column you're using to Lookup from on the merging file is actually full of unique values!
I noticed earlier today that PowerQuery won't throw you an error (like in PowerPivot) and will happily allow you to run a Many-Many merge. This will result in multiple rows being produced for each record that matches with a non-unique value.
How to validate a credit card number
This works: http://jsfiddle.net/WHKeK/
function validate_creditcardnumber()
{
var re16digit=/^\d{16}$/
if (document.myform.CreditCardNumber.value.search(re16digit) == -1)
alert("Please enter your 16 digit credit card numbers");
return false;
}
You have a typo. You call the variable re16digit, but in your search you have re10digit.
Debugging Stored Procedure in SQL Server 2008
Yes you can (provided you have at least the professional version of visual studio), although it requires a little setting up once you've done this it's not much different from debugging code. MSDN has a basic walkthrough.
Insert multiple rows into single column
Kindly ensure, the other columns are not constrained to accept Not null values, hence while creating columns in table just ignore "Not Null" syntax. eg
Create Table Table_Name(
col1 DataType,
col2 DataType);
You can then insert multiple row values in any of the columns you want to. For instance:
Insert Into TableName(columnname)
values
(x),
(y),
(z);
and so on…
Hope this helps.
WordPress asking for my FTP credentials to install plugins
As mentioned by Niels, this happens because the server process user can't write to the Wordpress folder.
But here's the thing a lot of articles don't explain. It's the owner of the php process, not the nginx process. If you try to change the nginx owner, it won't solve this.
To solve it, try running ps aux to see which user owns the php-fpm process. Then check that user is the same user as the owner of the wordpress folder, or can at least write to it. If the user can't write to it, you'll need to change permissions and/or ownership of the folder; or put the two users (server owner and wordpress folder owner) in a common group which can write to the folder; or change php.ini "user" property to a user that can write to the folder.
What is the use of join() in Python threading?
Thanks for this thread -- it helped me a lot too.
I learned something about .join() today.
These threads run in parallel:
d.start()
t.start()
d.join()
t.join()
and these run sequentially (not what I wanted):
d.start()
d.join()
t.start()
t.join()
In particular, I was trying to clever and tidy:
class Kiki(threading.Thread):
def __init__(self, time):
super(Kiki, self).__init__()
self.time = time
self.start()
self.join()
This works! But it runs sequentially. I can put the self.start() in __ init __, but not the self.join(). That has to be done after every thread has been started.
join() is what causes the main thread to wait for your thread to finish. Otherwise, your thread runs all by itself.
So one way to think of join() as a "hold" on the main thread -- it sort of de-threads your thread and executes sequentially in the main thread, before the main thread can continue. It assures that your thread is complete before the main thread moves forward. Note that this means it's ok if your thread is already finished before you call the join() -- the main thread is simply released immediately when join() is called.
In fact, it just now occurs to me that the main thread waits at d.join() until thread d finishes before it moves on to t.join().
In fact, to be very clear, consider this code:
import threading
import time
class Kiki(threading.Thread):
def __init__(self, time):
super(Kiki, self).__init__()
self.time = time
self.start()
def run(self):
print self.time, " seconds start!"
for i in range(0,self.time):
time.sleep(1)
print "1 sec of ", self.time
print self.time, " seconds finished!"
t1 = Kiki(3)
t2 = Kiki(2)
t3 = Kiki(1)
t1.join()
print "t1.join() finished"
t2.join()
print "t2.join() finished"
t3.join()
print "t3.join() finished"
It produces this output (note how the print statements are threaded into each other.)
$ python test_thread.py
32 seconds start! seconds start!1
seconds start!
1 sec of 1
1 sec of 1 seconds finished!
21 sec of
3
1 sec of 3
1 sec of 2
2 seconds finished!
1 sec of 3
3 seconds finished!
t1.join() finished
t2.join() finished
t3.join() finished
$
The t1.join() is holding up the main thread. All three threads complete before the t1.join() finishes and the main thread moves on to execute the print then t2.join() then print then t3.join() then print.
Corrections welcome. I'm also new to threading.
(Note: in case you're interested, I'm writing code for a DrinkBot, and I need threading to run the ingredient pumps concurrently rather than sequentially -- less time to wait for each drink.)
How to change indentation mode in Atom?
This is built into core: See Settings ? Tab Type and choose auto:
When set to "auto", the editor auto-detects the tab type based on the contents of the buffer (it uses the first leading whitespace on a non-comment line), or uses the value of the Soft Tabs config setting if auto-detection fails.
You may also want to take a look at the Auto Detect Indentation package. From the docs:
Automatically detect indentation of opened files. It looks at each opened file and sets file specific tab settings (hard/soft tabs, tab length) based on the content of the file instead of always using the editor defaults.
You might have atom configured to use 4 spaces for tabs but open a rails project which defaults to 2 spaces. Without this package, you would have to change your tabstop settings globally or risk having inconsistent lead spacing in your files.
Kill a postgresql session/connection
I'm on a mac and I use postgres via Postgres.app. I solved this problem just quitting and starting again the app.
Boxplot in R showing the mean
With ggplot2:
p<-qplot(spray,count,data=InsectSprays,geom='boxplot')
p<-p+stat_summary(fun.y=mean,shape=1,col='red',geom='point')
print(p)
How to customize message box
You can't restyle the default MessageBox as that's dependant on the current Windows OS theme, however you can easily create your own MessageBox. Just add a new form (i.e. MyNewMessageBox) to your project with these settings:
FormBorderStyle FixedToolWindow
ShowInTaskBar False
StartPosition CenterScreen
To show it use myNewMessageBoxInstance.ShowDialog();. And add a label and buttons to your form, such as OK and Cancel and set their DialogResults appropriately, i.e. add a button to MyNewMessageBox and call it btnOK. Set the DialogResult property in the property window to DialogResult.OK. When that button is pressed it would return the OK result:
MyNewMessageBox myNewMessageBoxInstance = new MyNewMessageBox();
DialogResult result = myNewMessageBoxInstance.ShowDialog();
if (result == DialogResult.OK)
{
// etc
}
It would be advisable to add your own Show method that takes the text and other options you require:
public DialogResult Show(string text, Color foreColour)
{
lblText.Text = text;
lblText.ForeColor = foreColour;
return this.ShowDialog();
}
C# static class constructor
We can create static constructor
static class StaticParent
{
StaticParent()
{
//write your initialization code here
}
}
and it is always parameter less.
static class StaticParent
{
static int i =5;
static StaticParent(int i) //Gives error
{
//write your initialization code here
}
}
and it doesn't have the access modifier
Writing outputs to log file and console
for log file you may date to enter into text data. following code may help
# declaring variables
Logfile="logfile.txt"
MAIL_LOG="Message to print in log file"
Location="were is u want to store log file"
cd $Location
if [ -f $Logfile ]
then
echo "$MAIL_LOG " >> $Logfile
else
touch $Logfile
echo "$MAIL_LOG" >> $Logfile
fi
ouput: 2. Log file will be created in first run and keep on updating from next runs. In case log file missing in future run , script will create new log file.
SQL Server: Null VS Empty String
NULL is a non value, like undefined. '' is a empty string with 0 characters.
The value of a string in database depends of your value in your UI, but generally, it's an empty string '' if you specify the parameter in your query or stored procedure.
How do I use a custom Serializer with Jackson?
I wrote an example for a custom Timestamp.class serialization/deserialization, but you could use it for what ever you want.
When creating the object mapper do something like this:
public class JsonUtils {
public static ObjectMapper objectMapper = null;
static {
objectMapper = new ObjectMapper();
SimpleModule s = new SimpleModule();
s.addSerializer(Timestamp.class, new TimestampSerializerTypeHandler());
s.addDeserializer(Timestamp.class, new TimestampDeserializerTypeHandler());
objectMapper.registerModule(s);
};
}
for example in java ee you could initialize it with this:
import java.time.LocalDateTime;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
@Provider
public class JacksonConfig implements ContextResolver<ObjectMapper> {
private final ObjectMapper objectMapper;
public JacksonConfig() {
objectMapper = new ObjectMapper();
SimpleModule s = new SimpleModule();
s.addSerializer(Timestamp.class, new TimestampSerializerTypeHandler());
s.addDeserializer(Timestamp.class, new TimestampDeserializerTypeHandler());
objectMapper.registerModule(s);
};
@Override
public ObjectMapper getContext(Class<?> type) {
return objectMapper;
}
}
where the serializer should be something like this:
import java.io.IOException;
import java.sql.Timestamp;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
public class TimestampSerializerTypeHandler extends JsonSerializer<Timestamp> {
@Override
public void serialize(Timestamp value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
String stringValue = value.toString();
if(stringValue != null && !stringValue.isEmpty() && !stringValue.equals("null")) {
jgen.writeString(stringValue);
} else {
jgen.writeNull();
}
}
@Override
public Class<Timestamp> handledType() {
return Timestamp.class;
}
}
and deserializer something like this:
import java.io.IOException;
import java.sql.Timestamp;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.SerializerProvider;
public class TimestampDeserializerTypeHandler extends JsonDeserializer<Timestamp> {
@Override
public Timestamp deserialize(JsonParser jp, DeserializationContext ds) throws IOException, JsonProcessingException {
SqlTimestampConverter s = new SqlTimestampConverter();
String value = jp.getValueAsString();
if(value != null && !value.isEmpty() && !value.equals("null"))
return (Timestamp) s.convert(Timestamp.class, value);
return null;
}
@Override
public Class<Timestamp> handledType() {
return Timestamp.class;
}
}
Replace last occurrence of character in string
What about this?
function replaceLast(x, y, z){
var a = x.split("");
a[x.lastIndexOf(y)] = z;
return a.join("");
}
replaceLast("Hello world!", "l", "x"); // Hello worxd!
Javascript to open popup window and disable parent window
The key term is modal-dialog.
As such there is no built in modal-dialog offered.
But you can use many others available e.g. this
How do I calculate someone's age in Java?
public int getAge(Date dateOfBirth)
{
Calendar now = Calendar.getInstance();
Calendar dob = Calendar.getInstance();
dob.setTime(dateOfBirth);
if (dob.after(now))
{
throw new IllegalArgumentException("Can't be born in the future");
}
int age = now.get(Calendar.YEAR) - dob.get(Calendar.YEAR);
if (now.get(Calendar.DAY_OF_YEAR) < dob.get(Calendar.DAY_OF_YEAR))
{
age--;
}
return age;
}
How can I determine whether a specific file is open in Windows?
If the file is a .dll then you can use the TaskList command line app to see whose got it open:
TaskList /M nameof.dll
Hive: Convert String to Integer
It would return NULL but if taken as BIGINT would show the number
Multiple submit buttons on HTML form – designate one button as default
My suggestion is don't fight this behaviour. You can effectively alter the order using floats. For example:
<p id="buttons">
<input type="submit" name="next" value="Next">
<input type="submit" name="prev" value="Previous">
</p>
with:
#buttons { overflow: hidden; }
#buttons input { float: right; }
will effectively reverse the order and thus the "Next" button will be the value triggered by hitting enter.
This kind of technique will cover many circumstances without having to resort to more hacky JavaScript methods.
How to check if X server is running?
This is PHP script for checking.
$xsession = `pidof X`;
if (!$xsession) {
echo "There is no active X session, aborting..\n";
exit;
}
Similar command can be used in shell script too. like the pidof command.
onNewIntent() lifecycle and registered listeners
onNewIntent() is meant as entry point for singleTop activities which already run somewhere else in the stack and therefore can't call onCreate(). From activities lifecycle point of view it's therefore needed to call onPause() before onNewIntent(). I suggest you to rewrite your activity to not use these listeners inside of onNewIntent(). For example most of the time my onNewIntent() methods simply looks like this:
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
// getIntent() should always return the most recent
setIntent(intent);
}
With all setup logic happening in onResume() by utilizing getIntent().
PHP - check if variable is undefined
You can use -
$isTouch = isset($variable);
It will return true if the $variable is defined. if the variable is not defined it will return false.
Note : Returns TRUE if var exists and has value other than NULL, FALSE otherwise.
If you want to check for false, 0 etc You can then use empty() -
$isTouch = empty($variable);
empty() works for -
- "" (an empty string)
- 0 (0 as an integer)
- 0.0 (0 as a float)
- "0" (0 as a string)
- NULL
- FALSE
- array() (an empty array)
- $var; (a variable declared, but without a value)
Your password does not satisfy the current policy requirements
For MySQL 8*
SET GLOBAL validate_password.policy=LOW
Reference Link to explain about policy - Click Here
Warning: The method assertEquals from the type Assert is deprecated
You're using junit.framework.Assert instead of org.junit.Assert.
"Post Image data using POSTMAN"
The accepted answer works if you set the JSON as a key/value pair in the form-data panel (See the image hereunder)
Nevertheless, I am wondering if it is a very clean way to design an API. If it is mandatory for you to upload both image and JSON in a single call maybe it is ok but if you could separate the routes (one for image uploading, the other for JSON body with a proper content-type header), it seems better.
How to check a channel is closed or not without reading it?
You could set your channel to nil in addition to closing it. That way you can check if it is nil.
example in the playground: https://play.golang.org/p/v0f3d4DisCz
edit: This is actually a bad solution as demonstrated in the next example, because setting the channel to nil in a function would break it: https://play.golang.org/p/YVE2-LV9TOp
Change the bullet color of list
I would recommend you to use background-image instead of default list.
.listStyle {
list-style: none;
background: url(image_path.jpg) no-repeat left center;
padding-left: 30px;
width: 20px;
height: 20px;
}
Or, if you don't want to use background-image as bullet, there is an option to do it with pseudo element:
.liststyle{
list-style: none;
margin: 0;
padding: 0;
}
.liststyle:before {
content: "• ";
color: red; /* or whatever color you prefer */
font-size: 20px;/* or whatever the bullet size you prefer */
}
Create a text file for download on-the-fly
Check out this SO question's accepted solution. Substitute your own filename for basename($File) and change filesize($File) to strlen($your_string). (You may want to use mb_strlen just in case the string contains multibyte characters.)
What is the difference between an abstract function and a virtual function?
You must always override an abstract function.
Thus:
- Abstract functions - when the inheritor must provide its own implementation
- Virtual - when it is up to the inheritor to decide
Bootstrap: Open Another Modal in Modal
Twitter docs says custom code is required...
This works with no extra JavaScript, though, custom CSS would be highly recommended...
<link href="http://netdna.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="//netdna.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>_x000D_
<!-- Button trigger modal -->_x000D_
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#modalOneModal">_x000D_
Launch demo modal_x000D_
</button> _x000D_
<!-- Modal -->_x000D_
<div class="modal fade bg-info" id="modalOneModal" tabindex="-1" role="dialog" aria-labelledby="modalOneLabel" aria-hidden="true">_x000D_
_x000D_
<div class="modal-dialog">_x000D_
_x000D_
<div class="modal-content bg-info">_x000D_
<div class="modal-header btn-info">_x000D_
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>_x000D_
<h4 class="modal-title" id="modalOneLabel">modalOne</h4>_x000D_
</div>_x000D_
<div id="thismodalOne" class="modal-body bg-info">_x000D_
_x000D_
_x000D_
<!-- Button trigger modal -->_x000D_
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#twoModalsExample">_x000D_
Launch demo modal_x000D_
</button>_x000D_
_x000D_
<div class="modal fade bg-info" id="twoModalsExample" style="overflow:auto" tabindex="-1" role="dialog" aria-hidden="true">_x000D_
<h3>EXAMPLE</h3>_x000D_
</div>_x000D_
</div>_x000D_
<div class="modal-footer btn-info" id="woModalFoot">_x000D_
<button type="button" class="btn btn-info" data-dismiss="modal">Close</button>_x000D_
</div>_x000D_
</div>_x000D_
</div>_x000D_
</div>_x000D_
<!-- End Form Modals -->Simulator or Emulator? What is the difference?
In computer science both a simulation and emulation produce the same outputs, from the same inputs, that the original system does; However, an emulation also uses the same processes to achieve it and is made out of the same materials. A simulation uses different processes from the original system. Also worth noting is the term replication, which is the intermediate of the two - using the same processes but being made out of a different material.
So if I want to run my old Super Mario Bros game on my PC I use an SNES emulator, because it is using the same or similar computer code (processes) to run the game, and uses the same or similar materials (silicon chip). However, if I want to fly a Boeing 747 jet on my PC I use a flight simulator because it uses completely different processes from the original (there are no actual wings, lift or aerodynamics involved!).
Here are the exact definitions taken from a computer science glossary:
A simulation is a model of a system that captures the functional connections between inputs and outputs of the system, but without necessarily being based on processes that are the same as, or similar to, those of the system itself.
A replication is a model of a system that captures the functional connections between inputs and outputs of the system and is based on processes that are the same as, or similar to, those of the system itself.
An emulation is a model of some system that captures the functional connections between inputs and outputs of the system, based on processes that are the same as, or similar to, those of that system, and that is built of the same materials as that system.
Reference: The Open University, M366 Glossary 1.1, 2007
How to check if an user is logged in Symfony2 inside a controller?
SecurityContext will be deprecated in Symfony 3.0
Prior to Symfony 2.6 you would use SecurityContext.
SecurityContext will be deprecated in Symfony 3.0 in favour of the AuthorizationChecker.
For Symfony 2.6+ & Symfony 3.0 use AuthorizationChecker.
Symfony 2.6 (and below)
// Get our Security Context Object - [deprecated in 3.0]
$security_context = $this->get('security.context');
# e.g: $security_context->isGranted('ROLE_ADMIN');
// Get our Token (representing the currently logged in user)
$security_token = $security_context->getToken();
# e.g: $security_token->getUser();
# e.g: $security_token->isAuthenticated();
# [Careful] ^ "Anonymous users are technically authenticated"
// Get our user from that security_token
$user = $security_token->getUser();
# e.g: $user->getEmail(); $user->isSuperAdmin(); $user->hasRole();
// Check for Roles on the $security_context
$isRoleAdmin = $security_context->isGranted('ROLE_ADMIN');
# e.g: (bool) true/false
Symfony 3.0+ (and from Symfony 2.6+)
security.context becomes security.authorization_checker.
We now get our token from security.token_storage instead of the security.context
// [New 3.0] Get our "authorization_checker" Object
$auth_checker = $this->get('security.authorization_checker');
# e.g: $auth_checker->isGranted('ROLE_ADMIN');
// Get our Token (representing the currently logged in user)
// [New 3.0] Get the `token_storage` object (instead of calling upon `security.context`)
$token = $this->get('security.token_storage')->getToken();
# e.g: $token->getUser();
# e.g: $token->isAuthenticated();
# [Careful] ^ "Anonymous users are technically authenticated"
// Get our user from that token
$user = $token->getUser();
# e.g (w/ FOSUserBundle): $user->getEmail(); $user->isSuperAdmin(); $user->hasRole();
// [New 3.0] Check for Roles on the $auth_checker
$isRoleAdmin = $auth_checker->isGranted('ROLE_ADMIN');
// e.g: (bool) true/false
Read more here in the docs: AuthorizationChecker
How to do this in twig?: Symfony 2: How do I check if a user is not logged in inside a template?
iOS (iPhone, iPad, iPodTouch) view real-time console log terminal
EDIT: Please use @cbowns solution - deviceconsole is compatible with iOS9 and much easier to use.
This is a open-source program that displays the iDevice's system log in Terminal (in a manner similar to tail -F). No jailbreak is required, and the output is fully grep'able so you can filter to see output from your program only. What's particularly good about this solution is you can view the log whether or not the app was launched in debug mode from XCode.
Here's how:
Grab the libimobiledevice binary for Mac OS X from my github account at https://github.com/benvium/libimobiledevice-macosx/zipball/master
Follow the install instructions here: https://github.com/benvium/libimobiledevice-macosx/blob/master/README.md
Connect your device, open up Terminal.app and type:
idevicesyslog
Up pops a real-time display of the device's system log.
With it being a console app, you can filter the log using unix commands, such as grep
For instance, see all log messages from a particular app:
idevicesyslog | grep myappname
Taken from my blog at http://pervasivecode.blogspot.co.uk/2012/06/view-log-output-of-any-app-on-iphone-or.html
White space showing up on right side of page when background image should extend full length of page
Debug your CSS for Ghost CSS Elements.
Use this bookmark to debug your CSS: https://blog.wernull.com/2013/04/debug-ghost-css-elements-causing-unwanted-scrolling/
Or add the CSS directly yourself:
* {
background: #000 !important;
color: #0f0 !important;
outline: solid #f00 1px !important;
}
In my case a Facebook Like Button caused the problem.
Can't ping a local VM from the host
Maybe your VMnet8 ip is not in the same network segment, e.g., my vm ip is 192.168.71.105, I can ping my windows in vm, but can't ping vm in windows, so this time you may check if vmnet8 is configured right. IP: 192.168.71.1
How can I pass an argument to a PowerShell script?
Call the script from a batch file (*.bat) or CMD
pwsh.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 -Param1 Hello -Param2 World"
pwsh.exe -NoLogo -ExecutionPolicy Bypass -Command "path-to-script/Script.ps1 -Param1 Hello -Param2 World"
pwsh.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 Hello -Param2 World"
pwsh.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 Hello World"
pwsh.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 -Param2 World Hello"
PowerShell
powershell.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 -Param1 Hello -Param2 World"
powershell.exe -NoLogo -ExecutionPolicy Bypass -Command "path-to-script/Script.ps1 -Param1 Hello -Param2 World"
powershell.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 Hello -Param2 World"
powershell.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 Hello World"
powershell.exe -NoLogo -ExecutionPolicy Bypass -Command "./Script.ps1 -Param2 World Hello"
Call from PowerShell
PowerShell Core or Windows PowerShell
& path-to-script/Script.ps1 -Param1 Hello -Param2 World
& ./Script.ps1 -Param1 Hello -Param2 World
Script.ps1 - Script Code
param(
[Parameter(Mandatory=$True, Position=0, ValueFromPipeline=$false)]
[System.String]
$Param1,
[Parameter(Mandatory=$True, Position=1, ValueFromPipeline=$false)]
[System.String]
$Param2
)
Write-Host $Param1
Write-Host $Param2
AndroidStudio gradle proxy
For an NTLM Authentication Proxy:
File -> Settings -> Project Settings -> Gradle -> Global Gradle Settings -> Gradle VM Options
-Dhttp.proxyHost=myProxyAddr -Dhttp.proxyPort=myProxyPort -Dhttp.proxyUser=myUsername -Dhttp.proxyPassword=myPasswd -Dhttp.auth.ntlm.domain=myDomainName
Loading local JSON file
An approach I like to use is to pad/wrap the json with an object literal, and then save the file with a .jsonp file extension. This method also leaves your original json file (test.json) unaltered, as you will be working with the new jsonp file (test.jsonp) instead. The name on the wrapper can be anything, but it does need to be the same name as the callback function you use to process the jsonp. I'll use your test.json posted as an example to show the jsonp wrapper addition for the 'test.jsonp' file.
json_callback({"a" : "b", "c" : "d"});
Next, create a reusable variable with global scope in your script to hold the returned JSON. This will make the returned JSON data available to all other functions in your script instead of just the callback function.
var myJSON;
Next comes a simple function to retrieve your json by script injection. Note that we can not use jQuery here to append the script to the document head, as IE does not support the jQuery .append method. The jQuery method commented out in the code below will work on other browsers that do support the .append method. It is included as a reference to show the difference.
function getLocalJSON(json_url){
var json_script = document.createElement('script');
json_script.type = 'text/javascript';
json_script.src = json_url;
json_script.id = 'json_script';
document.getElementsByTagName('head')[0].appendChild(json_script);
// $('head')[0].append(json_script); DOES NOT WORK in IE (.append method not supported)
}
Next is a short and simple callback function (with the same name as the jsonp wrapper) to get the json results data into the global variable.
function json_callback(response){
myJSON = response; // Clone response JSON to myJSON object
$('#json_script').remove(); // Remove json_script from the document
}
The json data can now be accessed by any functions of the script using dot notation. As an example:
console.log(myJSON.a); // Outputs 'b' to console
console.log(myJSON.c); // Outputs 'd' to console
This method may be a bit different from what you are used to seeing, but has many advantages. First, the same jsonp file can be loaded locally or from a server using the same functions. As a bonus, jsonp is already in a cross-domain friendly format and can also be easily used with REST type API's.
Granted, there are no error handling functions, but why would you need one? If you are unable to get the json data using this method, then you can pretty much bet you have some problems within the json itself, and I would check it on a good JSON validator.
HTML5 Canvas Resize (Downscale) Image High Quality?
Here is a reusable Angular service for high quality image / canvas resizing: https://gist.github.com/fisch0920/37bac5e741eaec60e983
The service supports lanczos convolution and step-wise downscaling. The convolution approach is higher quality at the cost of being slower, whereas the step-wise downscaling approach produces reasonably antialiased results and is significantly faster.
Example usage:
angular.module('demo').controller('ExampleCtrl', function (imageService) {
// EXAMPLE USAGE
// NOTE: it's bad practice to access the DOM inside a controller,
// but this is just to show the example usage.
// resize by lanczos-sinc filter
imageService.resize($('#myimg')[0], 256, 256)
.then(function (resizedImage) {
// do something with resized image
})
// resize by stepping down image size in increments of 2x
imageService.resizeStep($('#myimg')[0], 256, 256)
.then(function (resizedImage) {
// do something with resized image
})
})
How to use linux command line ftp with a @ sign in my username?
A more complete answer would be it is not possible with ftp(at least the ftp program installed on centos 6).
Since you wanted an un-attended process, "pts"'s answer will work fine.
Do the unattended upload with curl instead of ftp:
curl -u user:password -T file ftp://server/dir/file
%40 doesn't appear to work.
[~]# ftp domain.com
ftp: connect: Connection refused
ftp> quit
[~]# ftp some_user%[email protected]
ftp: some_user%[email protected]: Name or service not known
ftp> quit
All I've got is to open the ftp program and use the domain and enter the user when asked. Usually, a password is required anyway, so the interactive nature probably isn't problematic.
[~]# ftp domain.com
Connected to domain.com (173.254.13.235).
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 2 of 1000 allowed.
220-Local time is now 02:47. Server port: 21.
220-This is a private system - No anonymous login
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
Name (domain.com:user): [email protected]
331 User [email protected] OK. Password required
Password:
230 OK. Current restricted directory is /
Remote system type is UNIX.
Using binary mode to transfer files.
How to restrict SSH users to a predefined set of commands after login?
Why don't you write your own login-shell? It would be quite simple to use Bash for this, but you can use any language.
Example in Bash
Use your favorite editor to create the file /root/rbash.sh (this can be any name or path, but should be chown root:root and chmod 700):
#!/bin/bash
commands=("man" "pwd" "ls" "whoami")
timestamp(){ date +'%Y-%m-%s %H:%M:%S'; }
log(){ echo -e "$(timestamp)\t$1\t$(whoami)\t$2" > /var/log/rbash.log; }
trycmd()
{
# Provide an option to exit the shell
if [[ "$ln" == "exit" ]] || [[ "$ln" == "q" ]]
then
exit
# You can do exact string matching for some alias:
elif [[ "$ln" == "help" ]]
then
echo "Type exit or q to quit."
echo "Commands you can use:"
echo " help"
echo " echo"
echo "${commands[@]}" | tr ' ' '\n' | awk '{print " " $0}'
# You can use custom regular expression matching:
elif [[ "$ln" =~ ^echo\ .*$ ]]
then
ln="${ln:5}"
echo "$ln" # Beware, these double quotes are important to prevent malicious injection
# For example, optionally you can log this command
log COMMAND "echo $ln"
# Or you could even check an array of commands:
else
ok=false
for cmd in "${commands[@]}"
do
if [[ "$cmd" == "$ln" ]]
then
ok=true
fi
done
if $ok
then
$ln
else
log DENIED "$cmd"
fi
fi
}
# Optionally show a friendly welcome-message with instructions since it is a custom shell
echo "$(timestamp) Welcome, $(whoami). Type 'help' for information."
# Optionally log the login
log LOGIN "$@"
# Optionally log the logout
trap "trap=\"\";log LOGOUT;exit" EXIT
# Optionally check for '-c custom_command' arguments passed directly to shell
# Then you can also use ssh user@host custom_command, which will execute /root/rbash.sh
if [[ "$1" == "-c" ]]
then
shift
trycmd "$@"
else
while echo -n "> " && read ln
do
trycmd "$ln"
done
fi
All you have to do is set this executable as your login shell. For example, edit your /etc/passwd file, and replace your current login shell of that user /bin/bash with /root/rbash.sh.
This is just a simple example, but you can make it as advanced as you want, the idea is there. Be careful to not lock yourself out by changing login shell of your own and only user. And always test weird symbols and commands to see if it is actually secure.
You can test it with: su -s /root/rbash.sh.
Beware, make sure to match the whole command, and be careful with wildcards! Better exclude Bash-symbols such as ;, &, &&, ||, $, and backticks to be sure.
Depending on the freedom you give the user, it won't get much safer than this. I've found that often I only needed to make a user that has access to only a few relevant commands, and in that case this is really the better solution. However, do you wish to give more freedom, a jail and permissions might be more appropriate. Mistakes are easily made, and only noticed when it's already too late.
Get the current URL with JavaScript?
var currentPageUrlIs = "";
if (typeof this.href != "undefined") {
currentPageUrlIs = this.href.toString().toLowerCase();
}else{
currentPageUrlIs = document.location.toString().toLowerCase();
}
The above code can also help someone
Best C++ IDE or Editor for Windows
The question says specifically IDE so I am guessing thats what you want. In that case, the main options are Visual Studio and Eclipse CDT as stated above. Of those, I personally prefer Eclipse. However, don't necessarily limit yourself to an IDE. I prefer to use vim as my editor and WinDbg as my debugger. For compilation, your project will probably dictate this. I currently use NMAke on the command line.
Python 3 Building an array of bytes
agf's bytearray solution is workable, but if you find yourself needing to build up more complicated packets using datatypes other than bytes, you can try struct.pack(). http://docs.python.org/release/3.1.3/library/struct.html
How to achieve function overloading in C?
Try to declare these functions as extern "C++" if your compiler supports this, http://msdn.microsoft.com/en-us/library/s6y4zxec(VS.80).aspx
Integer.toString(int i) vs String.valueOf(int i)
The String class provides valueOf methods for all primitive types and Object type so I assume they are convenience methods that can all be accessed through the one class.
NB Profiling results
Average intToString = 5368ms, Average stringValueOf = 5689ms (for 100,000,000 operations)
public class StringIntTest {
public static long intToString () {
long startTime = System.currentTimeMillis();
for (int i = 0; i < 100000000; i++) {
String j = Integer.toString(i);
}
long finishTime = System.currentTimeMillis();
return finishTime - startTime;
}
public static long stringValueOf () {
long startTime = System.currentTimeMillis();
for (int i = 0; i < 100000000; i++) {
String j = String.valueOf(i);
}
long finishTime = System.currentTimeMillis();
return finishTime - startTime;
}
public static void main(String[] args) {
long intToStringElapsed = 0;
long stringValueOfElapsed = 0;
for (int i = 0; i < 10; i++) {
intToStringElapsed += intToString();
stringValueOfElapsed+= stringValueOf();
}
System.out.println("Average intToString = "+ (intToStringElapsed /10));
System.out.println("Average stringValueOf = " +(stringValueOfElapsed / 10));
}
}
How to return a string from a C++ function?
Assign something to your strings. This will definitely help.
Temporarily disable all foreign key constraints
In case you use a different database schemas than ".dbo" or your db is containing Pk´s, which are composed by several fields, please don´t use the the solution of Carter Medlin, otherwise you will damage your db!!!
When you are working with different schemas try this (don´t forget to make a backup of your database before!):
DECLARE @sql AS NVARCHAR(max)=''
select @sql = @sql +
'ALTER INDEX ALL ON ' + SCHEMA_NAME( t.schema_id) +'.'+ '['+ t.[name] + '] DISABLE;'+CHAR(13)
from
sys.tables t
where type='u'
select @sql = @sql +
'ALTER INDEX ' + i.[name] + ' ON ' + SCHEMA_NAME( t.schema_id) +'.'+'[' + t.[name] + '] REBUILD;'+CHAR(13)
from
sys.key_constraints i
join
sys.tables t on i.parent_object_id=t.object_id
where i.type='PK'
exec dbo.sp_executesql @sql;
go
After doing some Fk-free actions, you can switch back with
DECLARE @sql AS NVARCHAR(max)=''
select @sql = @sql +
'ALTER INDEX ALL ON ' + SCHEMA_NAME( t.schema_id) +'.'+'[' + t.[name] + '] REBUILD;'+CHAR(13)
from
sys.tables t
where type='u'
print @sql
exec dbo.sp_executesql @sql;
exec sp_msforeachtable "ALTER TABLE ? WITH NOCHECK CHECK CONSTRAINT ALL";
What's your favorite "programmer" cartoon?
For those who have worked at Accenture www.bigtimeconsulting.com has some awesome ones...
Here are just a few:
biggest integer that can be stored in a double
Wikipedia has this to say in the same context with a link to IEEE 754:
On a typical computer system, a 'double precision' (64-bit) binary floating-point number has a coefficient of 53 bits (one of which is implied), an exponent of 11 bits, and one sign bit.
2^53 is just over 9 * 10^15.
How to subscribe to an event on a service in Angular2?
Update: I have found a better/proper way to solve this problem using a BehaviorSubject or an Observable rather than an EventEmitter. Please see this answer: https://stackoverflow.com/a/35568924/215945
Also, the Angular docs now have a cookbook example that uses a Subject.
Original/outdated/wrong answer: again, don't use an EventEmitter in a service. That is an anti-pattern.
Using beta.1... NavService contains the EventEmiter. Component Navigation emits events via the service, and component ObservingComponent subscribes to the events.
nav.service.ts
import {EventEmitter} from 'angular2/core';
export class NavService {
navchange: EventEmitter<number> = new EventEmitter();
constructor() {}
emitNavChangeEvent(number) {
this.navchange.emit(number);
}
getNavChangeEmitter() {
return this.navchange;
}
}
components.ts
import {Component} from 'angular2/core';
import {NavService} from '../services/NavService';
@Component({
selector: 'obs-comp',
template: `obs component, item: {{item}}`
})
export class ObservingComponent {
item: number = 0;
subscription: any;
constructor(private navService:NavService) {}
ngOnInit() {
this.subscription = this.navService.getNavChangeEmitter()
.subscribe(item => this.selectedNavItem(item));
}
selectedNavItem(item: number) {
this.item = item;
}
ngOnDestroy() {
this.subscription.unsubscribe();
}
}
@Component({
selector: 'my-nav',
template:`
<div class="nav-item" (click)="selectedNavItem(1)">nav 1 (click me)</div>
<div class="nav-item" (click)="selectedNavItem(2)">nav 2 (click me)</div>
`,
})
export class Navigation {
item = 1;
constructor(private navService:NavService) {}
selectedNavItem(item: number) {
console.log('selected nav item ' + item);
this.navService.emitNavChangeEvent(item);
}
}
Adding minutes to date time in PHP
$newtimestamp = strtotime('2011-11-17 05:05 + 16 minute');
echo date('Y-m-d H:i:s', $newtimestamp);
result is
2011-11-17 05:21:00
Live demo is here
If you are no familiar with strtotime yet, you better head to php.net to discover it's great power :-)
Floating Point Exception C++ Why and what is it?
A "floating point number" is how computers usually represent numbers that are not integers -- basically, a number with a decimal point. In C++ you declare them with float instead of int. A floating point exception is an error that occurs when you try to do something impossible with a floating point number, such as divide by zero.
How do you remove Subversion control for a folder?
If you are running Windows then you can do a search on that folder for .svn and that will list them all. Pressing Ctrl + A will select all of them and pressing delete will remove all the 'pesky' Subversion stuff.
How do I measure separate CPU core usage for a process?
dstat -C 0,1,2,3
Will also give you the CPU usage of first 4 cores. Of course, if you have 32 cores then this command gets a little bit longer but useful if you only interested in few cores.
For example, if you only interested in core 3 and 7 then you could do
dstat -C 3,7
How can I install the VS2017 version of msbuild on a build server without installing the IDE?
The Visual Studio Build tools are a different download than the IDE. They appear to be a pretty small subset, and they're called Build Tools for Visual Studio 2019 (download).
You can use the GUI to do the installation, or you can script the installation of msbuild:
vs_buildtools.exe --add Microsoft.VisualStudio.Workload.MSBuildTools --quiet
Microsoft.VisualStudio.Workload.MSBuildTools is a "wrapper" ID for the three subcomponents you need:
- Microsoft.Component.MSBuild
- Microsoft.VisualStudio.Component.CoreBuildTools
- Microsoft.VisualStudio.Component.Roslyn.Compiler
You can find documentation about the other available CLI switches here.
The build tools installation is much quicker than the full IDE. In my test, it took 5-10 seconds. With --quiet there is no progress indicator other than a brief cursor change. If the installation was successful, you should be able to see the build tools in %programfiles(x86)%\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin.
If you don't see them there, try running without --quiet to see any error messages that may occur during installation.
How do I run a program with commandline arguments using GDB within a Bash script?
If the --args parameter is not working on your machine (i.e. on Solaris 8), you may start gdb like
gdb -ex "set args <arg 1> <arg 2> ... <arg n>"
And you can combine this with inputting a file to stdin and "running immediatelly":
gdb -ex "set args <arg 1> <arg 2> ... <arg n> < <input file>" -ex "r"
How do you remove a Cookie in a Java Servlet
In my environment, following code works. Although looks redundant at first glance, cookies[i].setValue(""); and cookies[i].setPath("/"); are necessary to clear the cookie properly.
private void eraseCookie(HttpServletRequest req, HttpServletResponse resp) {
Cookie[] cookies = req.getCookies();
if (cookies != null)
for (Cookie cookie : cookies) {
cookie.setValue("");
cookie.setPath("/");
cookie.setMaxAge(0);
resp.addCookie(cookie);
}
}
How to see indexes for a database or table in MySQL?
I propose this query:
SELECT DISTINCT s.*
FROM INFORMATION_SCHEMA.STATISTICS s
LEFT OUTER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t
ON t.TABLE_SCHEMA = s.TABLE_SCHEMA
AND t.TABLE_NAME = s.TABLE_NAME
AND s.INDEX_NAME = t.CONSTRAINT_NAME
WHERE 0 = 0
AND t.CONSTRAINT_NAME IS NULL
AND s.TABLE_SCHEMA = 'YOUR_SCHEMA_SAMPLE';
You found all Index only index.
Regard.
How to access the content of an iframe with jQuery?
<html>
<head>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
<script type="text/javascript">
$(function() {
//here you have the control over the body of the iframe document
var iBody = $("#iView").contents().find("body");
//here you have the control over any element (#myContent)
var myContent = iBody.find("#myContent");
});
</script>
</head>
<body>
<iframe src="mifile.html" id="iView" style="width:200px;height:70px;border:dotted 1px red" frameborder="0"></iframe>
</body>
</html>
Easiest way to compare arrays in C#
elementwise compare ? what about
public void Linq78a()
{
int[] numbers1 = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
bool bb = numbers.Zip(numbers1, (a, b) => (a == b)).Any(p => !p);
if (!bb) Console.WriteLine("Lists are equal (bb)");
else Console.WriteLine("Lists are not equal (bb)");
}
Replace the (a==b) condition by anything you'd like to compare in a and b.
(this combines two examples from MSDN developer Linq samples)
How to trigger a file download when clicking an HTML button or JavaScript
Anywhere between your <body> and </body> tags, put in a button using the below code:
<button>
<a href="file.doc" download>Click to Download!</a>
</button>
This is sure to work!
how to convert JSONArray to List of Object using camel-jackson
I had similar json response coming from client. Created one main list class, and one POJO class.
Server Document Root Path in PHP
$files = glob($_SERVER["DOCUMENT_ROOT"]."/myFolder/*");
PHP foreach loop through multidimensional array
<?php
$php_multi_array = array("lang"=>"PHP", "type"=>array("c_type"=>"MULTI", "p_type"=>"ARRAY"));
//Iterate through an array declared above
foreach($php_multi_array as $key => $value)
{
if (!is_array($value))
{
echo $key ." => ". $value ."\r\n" ;
}
else
{
echo $key ." => array( \r\n";
foreach ($value as $key2 => $value2)
{
echo "\t". $key2 ." => ". $value2 ."\r\n";
}
echo ")";
}
}
?>
OUTPUT:
lang => PHP
type => array(
c_type => MULTI
p_type => ARRAY
)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
For python 3, the default encoding would be "utf-8". Following steps are suggested in the base documentation:https://docs.python.org/2/library/csv.html#csv-examples in case of any problem
Create a function
def utf_8_encoder(unicode_csv_data): for line in unicode_csv_data: yield line.encode('utf-8')Then use the function inside the reader, for e.g.
csv_reader = csv.reader(utf_8_encoder(unicode_csv_data))
How to make a TextBox accept only alphabetic characters?
works for me, even though not the simplest one.
private void Alpha_Click(object sender, EventArgs e)
{
int count = 0;
foreach (char letter in inputTXT.Text)
{
if (Char.IsLetter(letter))
{
count++;
}
else
{
count = 0;
}
}
if (count != inputTXT.Text.Length)
{
errorBox.Text = "The input text must contain only alphabetic characters";
}
else
{
errorBox.Text = "";
}
}
How to stop VBA code running?
Add another button called "CancelButton" that sets a flag, and then check for that flag.
If you have long loops in the "stuff" then check for it there too and exit if it's set. Use DoEvents inside long loops to ensure that the UI works.
Bool Cancel
Private Sub CancelButton_OnClick()
Cancel=True
End Sub
...
Private Sub SomeVBASub
Cancel=False
DoStuff
If Cancel Then Exit Sub
DoAnotherStuff
If Cancel Then Exit Sub
AndFinallyDothis
End Sub
Python check if list items are integers?
You can use exceptional handling as str.digit will only work for integers and can fail for something like this too:
>>> str.isdigit(' 1')
False
Using a generator function:
def solve(lis):
for x in lis:
try:
yield float(x)
except ValueError:
pass
>>> mylist = ['1','orange','2','3','4','apple', '1.5', '2.6']
>>> list(solve(mylist))
[1.0, 2.0, 3.0, 4.0, 1.5, 2.6] #returns converted values
or may be you wanted this:
def solve(lis):
for x in lis:
try:
float(x)
return True
except:
return False
...
>>> mylist = ['1','orange','2','3','4','apple', '1.5', '2.6']
>>> [x for x in mylist if solve(x)]
['1', '2', '3', '4', '1.5', '2.6']
or using ast.literal_eval, this will work for all types of numbers:
>>> from ast import literal_eval
>>> def solve(lis):
for x in lis:
try:
literal_eval(x)
return True
except ValueError:
return False
...
>>> mylist=['1','orange','2','3','4','apple', '1.5', '2.6', '1+0j']
>>> [x for x in mylist if solve(x)]
['1', '2', '3', '4', '1.5', '2.6', '1+0j']
JSON.Parse,'Uncaught SyntaxError: Unexpected token o
var jsonStringNoQuotes = [{"Id":"10","Name":"Matt"},{"Id":"1","Name":"Rock"}];
it will create json object. no need to parse.
jsonStringQuotes = "'" + jsonStringNoQuotes + "'";
will return '[object]'
thats why it(below) is causing error
var myData = JSON.parse(jsonStringQuotes);
AES Encryption for an NSString on the iPhone
Since you haven't posted any code, it's difficult to know exactly which problems you're encountering. However, the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt() which caused compile errors.
A later comment on that post includes this adapted code, which works for me, and seems a bit more straightforward. If you include their code for the NSData category, you can write something like this: (Note: The printf() calls are only for demonstrating the state of the data at various points — in a real application, it wouldn't make sense to print such values.)
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
NSString *key = @"my password";
NSString *secret = @"text to encrypt";
NSData *plain = [secret dataUsingEncoding:NSUTF8StringEncoding];
NSData *cipher = [plain AES256EncryptWithKey:key];
printf("%s\n", [[cipher description] UTF8String]);
plain = [cipher AES256DecryptWithKey:key];
printf("%s\n", [[plain description] UTF8String]);
printf("%s\n", [[[NSString alloc] initWithData:plain encoding:NSUTF8StringEncoding] UTF8String]);
[pool drain];
return 0;
}
Given this code, and the fact that encrypted data will not always translate nicely into an NSString, it may be more convenient to write two methods that wrap the functionality you need, in forward and reverse...
- (NSData*) encryptString:(NSString*)plaintext withKey:(NSString*)key {
return [[plaintext dataUsingEncoding:NSUTF8StringEncoding] AES256EncryptWithKey:key];
}
- (NSString*) decryptData:(NSData*)ciphertext withKey:(NSString*)key {
return [[[NSString alloc] initWithData:[ciphertext AES256DecryptWithKey:key]
encoding:NSUTF8StringEncoding] autorelease];
}
This definitely works on Snow Leopard, and @Boz reports that CommonCrypto is part of the Core OS on the iPhone. Both 10.4 and 10.5 have /usr/include/CommonCrypto, although 10.5 has a man page for CCCryptor.3cc and 10.4 doesn't, so YMMV.
EDIT: See this follow-up question on using Base64 encoding for representing encrypted data bytes as a string (if desired) using safe, lossless conversions.
How to move a marker in Google Maps API
<style>
#frame{
position: fixed;
top: 5%;
background-color: #fff;
border-radius: 5px;
box-shadow: 0 0 6px #B2B2B2;
display: inline-block;
padding: 8px 8px;
width: 98%;
height: 92%;
display: none;
z-index: 1000;
}
#map{
position: fixed;
display: inline-block;
width: 99%;
height: 93%;
display: none;
z-index: 1000;
}
#loading{
position: fixed;
top: 50%;
left: 50%;
opacity: 1!important;
margin-top: -100px;
margin-left: -150px;
background-color: #fff;
border-radius: 5px;
box-shadow: 0 0 6px #B2B2B2;
display: inline-block;
padding: 8px 8px;
max-width: 66%;
display: none;
color: #000;
}
#mytitle{
color: #FFF;
background-image: linear-gradient(to bottom,#d67631,#d67631);
// border-color: rgba(47, 164, 35, 1);
width: 100%;
cursor: move;
}
#closex{
display: block;
float:right;
position:relative;
top:-10px;
right: -10px;
height: 20px;
cursor: pointer;
}
.pointer{
cursor: pointer !important;
}
</style>
<div id="loading">
<i class="fa fa-circle-o-notch fa-spin fa-2x"></i>
Loading...
</div>
<div id="frame">
<div id="headerx"></div>
<div id="map" >
</div>
</div>
<?php
$url = Yii::app()->baseUrl . '/reports/reports/transponderdetails';
?>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script>
<script>
function clode() {
$('#frame').hide();
$('#frame').html();
}
function track(id) {
$('#loading').show();
$('#loading').parent().css("opacity", '0.7');
$.ajax({
type: "POST",
url: '<?php echo $url; ?>',
data: {'id': id},
success: function(data) {
$('#frame').show();
$('#headerx').html(data);
$('#loading').parents().css("opacity", '1');
$('#loading').hide();
var thelat = parseFloat($('#lat').text());
var long = parseFloat($('#long').text());
$('#map').show();
var lat = thelat;
var lng = long;
var orlat=thelat;
var orlong=long;
//Intialize the Path Array
var path = new google.maps.MVCArray();
var service = new google.maps.DirectionsService();
var myLatLng = new google.maps.LatLng(lat, lng), myOptions = {zoom: 4, center: myLatLng, mapTypeId: google.maps.MapTypeId.ROADMAP};
var map = new google.maps.Map(document.getElementById('map'), myOptions);
var poly = new google.maps.Polyline({map: map, strokeColor: '#4986E7'});
var marker = new google.maps.Marker({position: myLatLng, map: map});
function initialize() {
marker.setMap(map);
movepointer(map, marker);
var drawingManager = new google.maps.drawing.DrawingManager();
drawingManager.setMap(map);
}
function movepointer(map, marker) {
marker.setPosition(new google.maps.LatLng(lat, lng));
map.panTo(new google.maps.LatLng(lat, lng));
var src = myLatLng;//start point
var des = myLatLng;// should be the destination
path.push(src);
poly.setPath(path);
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.DRIVING
}, function(result, status) {
if (status == google.maps.DirectionsStatus.OK) {
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
}
;
// function()
setInterval(function() {
lat = Math.random() + orlat;
lng = Math.random() + orlong;
console.log(lat + "-" + lng);
myLatLng = new google.maps.LatLng(lat, lng);
movepointer(map, marker);
}, 1000);
},
error: function() {
$('#frame').html('Sorry, no details found');
},
});
return false;
}
$(function() {
$("#frame").draggable();
});
</script>
What is the 'instanceof' operator used for in Java?
If source is an object variable, instanceof is a way of checking to see if it is a Button or not.
HTTP 404 Page Not Found in Web Api hosted in IIS 7.5
For me the problem was the root site was configured to use a .NET 2.0 app pool, and my application within that site was .NET 4.5.
I created a new site with a .NET 4 app pool and placed my application at the root of that - and that worked fine.
How can I switch language in google play?
Answer below the dotted line below is the original that's now outdated.
Here is the latest information ( Thank you @deadfish ):
add &hl=<language> like &hl=pl or &hl=en
example: https://play.google.com/store/apps/details?id=com.example.xxx&hl=en or https://play.google.com/store/apps/details?id=com.example.xxx&hl=pl
All available languages and abbreviations can be looked up here: https://support.google.com/googleplay/android-developer/table/4419860?hl=en
......................................................................
To change the actual local market:
Basically the market is determined automatically based on your IP. You can change some local country settings from your Gmail account settings but still IP of the country you're browsing from is more important. To go around it you'd have to Proxy-cheat. Check out some ways/sites: http://www.affilorama.com/forum/market-research/how-to-change-country-search-settings-in-google-t4160.html
To do it from an Android phone you'd need to find an app. I don't have my Droid anymore but give this a try: http://forum.xda-developers.com/showthread.php?t=694720
React.js, wait for setState to finish before triggering a function?
setState takes new state and optional callback function which is called after the state has been updated.
this.setState(
{newState: 'whatever'},
() => {/*do something after the state has been updated*/}
)
Recover from git reset --hard?
I accidentally ran git reset --hard on my repo today too while having uncommitted changes too today. To get it back, I ran git fsck --lost-found, which wrote all unreferenced blobs to <path to repo>/.git/lost-found/. Since the files were uncommitted, I found them in the other directory within the <path to repo>/.git/lost-found/. From there, I can see the uncommitted files using git show <filename>, copy out the blobs, and rename them.
Note: This only works if you added the files you want to save to the index (using git add .). If the files weren't in the index, they are lost.
How good is Java's UUID.randomUUID?
Since most answers focused on the theory I think I can add something to the discussion by giving a practical test I did. In my database I have around 4.5 million UUIDs generated using Java 8 UUID.randomUUID(). The following ones are just some I found out:
c0f55f62-b990-47bc-8caa-f42313669948
c0f55f62-e81e-4253-8299-00b4322829d5
c0f55f62-4979-4e87-8cd9-1c556894e2bb
b9ea2498-fb32-40ef-91ef-0ba00060fe64
be87a209-2114-45b3-9d5a-86d00060fe64
4a8a74a6-e972-4069-b480-bdea1177b21f
12fb4958-bee2-4c89-8cf8-edea1177b21f
If it was truly random, the probability of having these kind of similar UUIDs would be considerably low (see edit), since we're considering only 4.5 million entries. So, although this function is good, in terms of not having collisions, for me it doesn't seem that good as it would be in theory.
Edit:
A lot of people seem to not understand this answer so I'll clarify my point: I know that the similarities are "small" and far from a full collision. However, I just wanted to compare the Java's UUID.randomUUID() with a true random number generator, which is the actual question.
In a true random number generator, the probability of the last case happening would be around = 0.007%. Therefore, I think my conclusion stands.
Formula is explained in this wiki article en.wikipedia.org/wiki/Birthday_problem
Why am I getting this redefinition of class error?
You should wrap the .h file like so:
#ifndef Included_NameModel_H
#define Included_NameModel_H
// Existing code goes here
#endif
Remove all subviews?
In objective-C, go ahead and create a category method off of the UIView class.
- (void)removeAllSubviews
{
for (UIView *subview in self.subviews)
[subview removeFromSuperview];
}
How to get the top 10 values in postgresql?
For this you can use limit
select *
from scores
order by score desc
limit 10
If performance is important (when is it not ;-) look for an index on score.
Starting with version 8.4, you can also use the standard (SQL:2008) fetch first
select *
from scores
order by score desc
fetch first 10 rows only
As @Raphvanns pointed out, this will give you the first 10 rows literally. To remove duplicate values, you have to select distinct rows, e.g.
select distinct *
from scores
order by score desc
fetch first 10 rows only
Unix command-line JSON parser?
If you're looking for a portable C compiled tool:
http://stedolan.github.com/jq/
From the website:
jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.
jq can mangle the data format that you have into the one that you want with very little effort, and the program to do so is often shorter and simpler than you’d expect.
Tutorial: http://stedolan.github.com/jq/tutorial/
Manual: http://stedolan.github.com/jq/manual/
Download: http://stedolan.github.com/jq/download/
How to get all groups that a user is a member of?
Get-ADPrincipalGroupMembership USERLOGON | select name
Is it ok to scrape data from Google results?
Google will eventually block your IP when you exceed a certain amount of requests.
Calculate difference between two datetimes in MySQL
If your start and end datetimes are on different days use TIMEDIFF.
SELECT TIMEDIFF(datetime1,datetime2)
if datetime1 > datetime2 then
SELECT TIMEDIFF("2019-02-20 23:46:00","2019-02-19 23:45:00")
gives: 24:01:00
and datetime1 < datetime2
SELECT TIMEDIFF("2019-02-19 23:45:00","2019-02-20 23:46:00")
gives: -24:01:00
What's the best way to join on the same table twice?
First, I would try and refactor these tables to get away from using phone numbers as natural keys. I am not a fan of natural keys and this is a great example why. Natural keys, especially things like phone numbers, can change and frequently so. Updating your database when that change happens will be a HUGE, error-prone headache. *
Method 1 as you describe it is your best bet though. It looks a bit terse due to the naming scheme and the short aliases but... aliasing is your friend when it comes to joining the same table multiple times or using subqueries etc.
I would just clean things up a bit:
SELECT t.PhoneNumber1, t.PhoneNumber2,
t1.SomeOtherFieldForPhone1, t2.someOtherFieldForPhone2
FROM Table1 t
JOIN Table2 t1 ON t1.PhoneNumber = t.PhoneNumber1
JOIN Table2 t2 ON t2.PhoneNumber = t.PhoneNumber2
What i did:
- No need to specify INNER - it's implied by the fact that you don't specify LEFT or RIGHT
- Don't n-suffix your primary lookup table
- N-Suffix the table aliases that you will use multiple times to make it obvious
*One way DBAs avoid the headaches of updating natural keys is to not specify primary keys and foreign key constraints which further compounds the issues with poor db design. I've actually seen this more often than not.
MongoDB: How to find out if an array field contains an element?
I am trying to explain by putting problem statement and solution to it. I hope it will help
Problem Statement:
Find all the published products, whose name like ABC Product or PQR Product, and price should be less than 15/-
Solution:
Below are the conditions that need to be taken care of
- Product price should be less than 15
- Product name should be either ABC Product or PQR Product
- Product should be in published state.
Below is the statement that applies above criterion to create query and fetch data.
$elements = $collection->find(
Array(
[price] => Array( [$lt] => 15 ),
[$or] => Array(
[0]=>Array(
[product_name]=>Array(
[$in]=>Array(
[0] => ABC Product,
[1]=> PQR Product
)
)
)
),
[state]=>Published
)
);
Getting Index of an item in an arraylist;
Rather than a brute force loop through the list (eg 1 to 10000), rather use an iterative search approach : The List needs to be sorted by the element to be tested.
Start search at the middle element size()/2 eg 5000 if search item greater than element at 5000, then test the element at the midpoint between the upper(10000) and midpoint(5000) - 7500
keep doing this until you reach the match (or use a brute force loop through once you get down to a smaller range (eg 20 items)
You can search a list of 10000 in around 13 to 14 tests, rather than potentially 9999 tests.
How to consume a SOAP web service in Java
Here you can find a nice tutorial of how you can create and consume a SOAP service through WSDL. Long story short you need to call wsimport tool from command line (you can find it in your jdk) with parameters like -s (source for .java files) -d (destination for .class files) and the wsdl link.
$ wsimport -s "C:\workspace\soap\src\main\java\com\test\soap\ws" -d "C:\workspace\soap\target\classes\com\test\soap\ws" http://localhost:8855/soap/test?wsdl
After the stubs are created, you can call the webservices very easy something like:
TestHarnessService harnessService = new TestHarnessService();
ITestApi testApi = harnessService.getBasicHttpBindingITestApi();
testApi.resetLogMemoryTarget();
NLTK and Stopwords Fail #lookuperror
If you want to manually install NLTK Corpus.
1) Go to http://www.nltk.org/nltk_data/ and download your desired NLTK Corpus file.
2) Now in a Python shell check the value of nltk.data.path
3) Choose one of the path that exists on your machine, and unzip the data files into the corpora sub directory inside.
4) Now you can import the data from nltk.corpos import stopwords
Reference: https://medium.com/@satorulogic/how-to-manually-download-a-nltk-corpus-f01569861da9
Difference between getAttribute() and getParameter()
It is crucial to know that attributes are not parameters.
The return type for attributes is an Object, whereas the return type for a parameter is a String. When calling the getAttribute(String name) method, bear in mind that the attributes must be cast.
Additionally, there is no servlet specific attributes, and there are no session parameters.
This post is written with the purpose to connect on @Bozho's response, as additional information that can be useful for other people.
PHP __get and __set magic methods
Drop the public $bar; declaration and it should work as expected.
SSRS chart does not show all labels on Horizontal axis
(Three years late...) but I believe the answer to your second question is that SSRS essentially treats data from your datasets as unsorted; I'm not sure if it ignores any ORDER BY in the sql, or if it just assumes the data is unsorted.
To sort your groups in a particular order, you need to specify it in the report:
- Select the chart,
- In the Chart Data popup window (where you specify the Category Groups), right-click your Group and click Category Group Properties,
- Click on the Sorting option to see a control to set the Sort order
For the report I just created, the default sort order on the category was alphabetic on the category group which was basically a string code. But sometimes it can be useful to sort by some other characteristic of the data; for example, my report is of Average and Maximum processing times for messages identified by some code (the category). By setting the sort order of the group to be on [MaxElapsedMs], Z->A it draws my attention to the worst-performing message-types.
This sort of presentation won't be useful for every report but it can be an excellent tool to guide readers to have a better understanding of the data; though on other occasions you might prefer a report to have the same ordering every time it runs, in which case sorting on the category label itself may be best... and I guess there are circumstances where changing the sort order could harm understanding, such as if the categories implied some sort of ordering (such as date values?)
Rotating x axis labels in R for barplot
Rotate the x axis labels with angle equal or smaller than 90 degrees using base graphics. Code adapted from the R FAQ:
par(mar = c(7, 4, 2, 2) + 0.2) #add room for the rotated labels
#use mtcars dataset to produce a barplot with qsec colum information
mtcars = mtcars[with(mtcars, order(-qsec)), ] #order mtcars data set by column "qsec"
end_point = 0.5 + nrow(mtcars) + nrow(mtcars) - 1 #this is the line which does the trick (together with barplot "space = 1" parameter)
barplot(mtcars$qsec, col = "grey50",
main = "",
ylab = "mtcars - qsec", ylim = c(0,5 + max(mtcars$qsec)),
xlab = "",
space = 1)
#rotate 60 degrees (srt = 60)
text(seq(1.5, end_point, by = 2), par("usr")[3]-0.25,
srt = 60, adj = 1, xpd = TRUE,
labels = paste(rownames(mtcars)), cex = 0.65)
What's the main difference between Java SE and Java EE?
Java EE is enterprise edition.
Includes jsp, servlets, beans, and some other stuff for server programming.
Java SE is standard edition. This is plain old Java. Includes GUI stuff.
Set disable attribute based on a condition for Html.TextBoxFor
If you don't use html helpers you may use simple ternary expression like this:
<input name="Field"
value="@Model.Field" tabindex="0"
@(Model.IsDisabledField ? "disabled=\"disabled\"" : "")>
Is there a better alternative than this to 'switch on type'?
You can create overloaded methods:
void Foo(A a)
{
a.Hop();
}
void Foo(B b)
{
b.Skip();
}
void Foo(object o)
{
throw new ArgumentException("Unexpected type: " + o.GetType());
}
And cast the argument to dynamic type in order to bypass static type checking:
Foo((dynamic)something);
postgresql port confusion 5433 or 5432?
I ran into this problem as well, it ended up that I had two postgres servers running at the same time. I uninstalled one of them and changed the port back to 5432 and works fine now.
How to create a Date in SQL Server given the Day, Month and Year as Integers
In SQL Server 2012+, you can use DATEFROMPARTS():
DECLARE @Year int = 2016, @Month int = 10, @Day int = 25;
SELECT DATEFROMPARTS (@Year, @Month, @Day);
In earlier versions, one method is to create and convert a string.
There are a few string date formats which SQL Server reliably interprets regardless of the date, language, or internationalization settings.
A six- or eight-digit string is always interpreted as ymd. The month and day must always be two digits.
https://docs.microsoft.com/en-us/sql/t-sql/data-types/datetime-transact-sql
So a string in the format 'yyyymmdd' will always be properly interpreted.
(ISO 8601-- YYYY-MM-DDThh:mm:ss-- also works, but you have to specify time and therefore it's more complicated than you need.)
While you can simply CAST this string as a date, you must use CONVERT in order to specify a style, and you must specify a style in order to be deterministic (if that matters to you).
The "yyyymmdd" format is style 112, so your conversion looks like this:
DECLARE @Year int = 2016, @Month int = 10, @Day int = 25;
SELECT CONVERT(date,CONVERT(varchar(50),(@Year*10000 + @Month*100 + @Day)),112);
And it results in:
2016-10-25
Technically, the ISO/112/yyyymmdd format works even with other styles specified. For example, using that text format with style 104 (German, dd.mm.yyyy):
DECLARE @Year int = 2016, @Month int = 10, @Day int = 25;
SELECT CONVERT(date,CONVERT(varchar(50),(@Year*10000 + @Month*100 + @Day)),104);
Also still results in:
2016-10-25
Other formats are not as robust. For example this:
SELECT CASE WHEN CONVERT(date,'01-02-1900',110) = CONVERT(date,'01-02-1900',105) THEN 1 ELSE 0 END;
Results in:
0
As a side note, with this method, beware that nonsense inputs can yield valid but incorrect dates:
DECLARE @Year int = 2016, @Month int = 0, @Day int = 1025;
SELECT CONVERT(date,CONVERT(varchar(50),(@Year*10000 + @Month*100 + @Day)),112);
Also yields:
2016-10-25
DATEFROMPARTS protects you from invalid inputs. This:
DECLARE @Year int = 2016, @Month int = 10, @Day int = 32;
SELECT DATEFROMPARTS (@Year, @Month, @Day);
Yields:
Msg 289, Level 16, State 1, Line 2 Cannot construct data type date, some of the arguments have values which are not valid.
Also beware that this method does not work for dates prior to 1000-01-01. For example:
DECLARE @Year int = 900, @Month int = 1, @Day int = 1;
SELECT CONVERT(date,CONVERT(varchar(50),(@Year*10000 + @Month*100 + @Day)),112);
Yields:
Msg 241, Level 16, State 1, Line 2 Conversion failed when converting date and/or time from character string.
That's because the resulting string, '9000101', is not in the 'yyyymmdd' format. To ensure proper formatting, you'd have to pad it with leading zeroes, at the sacrifice of some small amount of performance. For example:
DECLARE @Year int = 900, @Month int = 1, @Day int = 1;
SELECT CONVERT(date,RIGHT('000' + CONVERT(varchar(50),(@Year*10000 + @Month*100 + @Day)),8),112);
Results in:
0900-01-01
There are other methods aside from string conversion. Several are provided in answers to "Create a date with T-SQL". A notable example involves creating the date by adding years, months, and days to the "zero date".
(This answer was inspired by Gordon Linoff's answer, which I expanded on and provided additional documentation and notes.)
javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
Issue resolved.!!! Below are the solutions.
For Java 6: Add below jars into {JAVA_HOME}/jre/lib/ext. 1. bcprov-ext-jdk15on-154.jar 2. bcprov-jdk15on-154.jar
Add property into {JAVA_HOME}/jre/lib/security/java.security security.provider.1=org.bouncycastle.jce.provider.BouncyCastleProvider
Java 7:download jar from below link and add to {JAVA_HOME}/jre/lib/security http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
Java 8:download jar from below link and add to {JAVA_HOME}/jre/lib/security http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html
Issue is that it is failed to decrypt 256 bits of encryption.
*ngIf and *ngFor on same element causing error
On other solution might be to put an empty array in your for loop in the case where you don't want to display it
<div *ngFor="let thing of show ? stuff : []">
Where "stuff" is an array of "thing" and "show" the boolean to display or not the content
Transparent background on winforms?
A simple solution to get a transparent background in a windows form is to overwrite the OnPaintBackground method like this:
protected override void OnPaintBackground(PaintEventArgs e)
{
//empty implementation
}
(Notice that the base.OnpaintBackground(e) is removed from the function)
How do I prevent site scraping?
Sorry, it's really quite hard to do this...
I would suggest that you politely ask them to not use your content (if your content is copyrighted).
If it is and they don't take it down, then you can take furthur action and send them a cease and desist letter.
Generally, whatever you do to prevent scraping will probably end up with a more negative effect, e.g. accessibility, bots/spiders, etc.
Overriding a JavaScript function while referencing the original
The examples above don't correctly apply this or pass arguments correctly to the function override. Underscore _.wrap() wraps existing functions, applies this and passes arguments correctly. See: http://underscorejs.org/#wrap
In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros?
The method javax.xml.bind.DatatypeConverter.printHexBinary(), part of the Java Architecture for XML Binding (JAXB), was a convenient way to convert a byte[] to a hex string. The DatatypeConverter class also included many other useful data-manipulation methods.
In Java 8 and earlier, JAXB was part of the Java standard library. It was deprecated with Java 9 and removed with Java 11, as part of an effort to move all Java EE packages into their own libraries. It's a long story. Now, javax.xml.bind doesn't exist, and if you want to use JAXB, which contains DatatypeConverter, you'll need to install the JAXB API and JAXB Runtime from Maven.
Example usage:
byte bytes[] = {(byte)0, (byte)0, (byte)134, (byte)0, (byte)61};
String hex = javax.xml.bind.DatatypeConverter.printHexBinary(bytes);
Will result in:
000086003D
How can I dynamically set the position of view in Android?
One thing to keep in mind with positioning is that each view has an index relative to its parent view. So if you have a linear layout with three subviews, the subviews will each have an index: 0, 1, 2 in the above case.
This allows you to add a view to the last position (or the end) in a parent view by doing something like this:
int childCount = parent.getChildCount();
parentView.addView(newView, childCount);
Alternatively you could replace a view using something like the following:
int childIndex = parentView.indexOfChild(childView);
childView.setVisibility(View.GONE);
parentView.addView(newView, childIndex);
Execute curl command within a Python script
Try with subprocess
CurlUrl="curl 'https://www.example.com/' -H 'Connection: keep-alive' -H 'Cache-
Control: max-age=0' -H 'Origin: https://www.example.com' -H 'Accept-Encoding:
gzip, deflate, br' -H 'Cookie: SESSID=ABCDEF' --data-binary 'Pathfinder' --
compressed"
Use getstatusoutput to store the results
status, output = subprocess.getstatusoutput(CurlUrl)
how to install python distutils
You can install the python-distutils package. sudo apt-get install python-distutils should suffice.
How to remove a class from elements in pure JavaScript?
var elems = document.querySelectorAll(".widget.hover");
[].forEach.call(elems, function(el) {
el.classList.remove("hover");
});
You can patch .classList into IE9. Otherwise, you'll need to modify the .className.
var elems = document.querySelectorAll(".widget.hover");
[].forEach.call(elems, function(el) {
el.className = el.className.replace(/\bhover\b/, "");
});
The .forEach() also needs a patch for IE8, but that's pretty common anyway.
How to round an average to 2 decimal places in PostgreSQL?
According to Bryan's response you can do this to limit decimals in a query. I convert from km/h to m/s and display it in dygraphs but when I did it in dygraphs it looked weird. Looks fine when doing the calculation in the query instead. This is on postgresql 9.5.1.
select date,(wind_speed/3.6)::numeric(7,1) from readings;
SASS :not selector
I tried re-creating this, and .someclass.notip was being generated for me but .someclass:not(.notip) was not, for as long as I did not have the @mixin tip() defined. Once I had that, it all worked.
http://sassmeister.com/gist/9775949
$dropdown-width: 100px;
$comp-tip: true;
@mixin tip($pos:right) {
}
@mixin dropdown-pos($pos:right) {
&:not(.notip) {
@if $comp-tip == true{
@if $pos == right {
top:$dropdown-width * -0.6;
background-color: #f00;
@include tip($pos:$pos);
}
}
}
&.notip {
@if $pos == right {
top: 0;
left:$dropdown-width * 0.8;
background-color: #00f;
}
}
}
.someclass { @include dropdown-pos(); }
EDIT: http://sassmeister.com/ is a good place to debug your SASS because it gives you error messages. Undefined mixin 'tip'. it what I get when I remove @mixin tip($pos:right) { }
Bigger Glyphicons
The .btn-lg class has the following CSS in Bootstrap 3 (link):
.btn-lg {
padding: 10px 16px;
font-size: 18px;
line-height: 1.33;
border-radius: 6px;
}
If you apply the same font-size and line-height to your span (either .glyphicon-link or a newly created .glyphicons-lg if you're going to use this effect in more than one instance), you'll get a Glyphicon the same size as the large button.
How to add jQuery code into HTML Page
Make sure that you embedd the jQuery library into your page by adding the below
shown line into your <head> block:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
Submitting HTML form using Jquery AJAX
If you add:
jquery.form.min.js
You can simply do this:
<script>
$('#myform').ajaxForm(function(response) {
alert(response);
});
// this will register the AJAX for <form id="myform" action="some_url">
// and when you submit the form using <button type="submit"> or $('myform').submit(), then it will send your request and alert response
</script>
NOTE:
You could use simple $('FORM').serialize() as suggested in post above, but that will not work for FILE INPUTS... ajaxForm() will.
Merging two images with PHP
Merger two image png and jpg/png [Image Masking]
//URL or Local path
$src_url = '1.png';
$dest_url = '2.jpg';
$src = imagecreatefrompng($src_url);
$dest1 = imagecreatefromjpeg($dest_url);
//if you want to make same size
list($width, $height) = getimagesize($dest_url);
list($newWidth, $newHeight) = getimagesize($src_url);
$dest = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($dest, $dest1, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
list($src_w, $src_h) = getimagesize($src_url);
//merger with same size
$this->imagecopymerge_alpha($dest, $src, 0, 0, 0, 0, $src_w, $src_h, 100);
//show output on browser
header('Content-Type: image/png');
imagejpeg($dest);
function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct)
{
$cut = imagecreatetruecolor($src_w, $src_h);
imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h);
imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h);
imagecopymerge($dst_im, $cut, $dst_x, $dst_y, 0, 0, $src_w, $src_h, $pct);
}
What is the difference between up-casting and down-casting with respect to class variable
Upcasting is casting to a supertype, while downcasting is casting to a subtype. Upcasting is always allowed, but downcasting involves a type check and can throw a ClassCastException.
In your case, a cast from a Dog to an Animal is an upcast, because a Dog is-a Animal. In general, you can upcast whenever there is an is-a relationship between two classes.
Downcasting would be something like this:
Animal animal = new Dog();
Dog castedDog = (Dog) animal;
Basically what you're doing is telling the compiler that you know what the runtime type of the object really is. The compiler will allow the conversion, but will still insert a runtime sanity check to make sure that the conversion makes sense. In this case, the cast is possible because at runtime animal is actually a Dog even though the static type of animal is Animal.
However, if you were to do this:
Animal animal = new Animal();
Dog notADog = (Dog) animal;
You'd get a ClassCastException. The reason why is because animal's runtime type is Animal, and so when you tell the runtime to perform the cast it sees that animal isn't really a Dog and so throws a ClassCastException.
To call a superclass's method you can do super.method() or by performing the upcast.
To call a subclass's method you have to do a downcast. As shown above, you normally risk a ClassCastException by doing this; however, you can use the instanceof operator to check the runtime type of the object before performing the cast, which allows you to prevent ClassCastExceptions:
Animal animal = getAnimal(); // Maybe a Dog? Maybe a Cat? Maybe an Animal?
if (animal instanceof Dog) {
// Guaranteed to succeed, barring classloader shenanigans
Dog castedDog = (Dog) animal;
}
JSON array get length
I came here and looking how to get the number of elements inside a JSONArray. From your question i used length() like that:
JSONArray jar = myjson.getJSONArray("_types");
System.out.println(jar.length());
and it worked as expected. On the other hand jar.size();(as proposed in the other answer) is not working for me.
So for future users searching (like me) how to get the size of a JSONArray, length() works just fine.
How to support HTTP OPTIONS verb in ASP.NET MVC/WebAPI application
I've had same problem, and this is how I fixed it:
Just throw this in your web.config:
<system.webServer>
<modules>
<remove name="WebDAVModule" />
</modules>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Expose-Headers " value="WWW-Authenticate"/>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Methods" value="GET, POST, OPTIONS, PUT, PATCH, DELETE" />
<add name="Access-Control-Allow-Headers" value="accept, authorization, Content-Type" />
<remove name="X-Powered-By" />
</customHeaders>
</httpProtocol>
<handlers>
<remove name="WebDAV" />
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
</system.webServer>
How to create a simple map using JavaScript/JQuery
var map = {'myKey1':myObj1, 'mykey2':myObj2};
// You don't need any get function, just use
map['mykey1']
Adding a color background and border radius to a Layout
background.xml in drawable folder.
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFFFFF"/>
<stroke
android:width="3dp"
android:color="#0FECFF" />
//specify gradient
<gradient
android:startColor="#ffffffff"
android:endColor="#110000FF"
android:angle="90"/>
<padding
android:left="5dp"
android:top="5dp"
android:right="5dp"
android:bottom="5dp"/>
<corners
android:bottomRightRadius="7dp"
android:bottomLeftRadius="7dp"
android:topLeftRadius="7dp"
android:topRightRadius="7dp"/>
</shape>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="210dp"
android:orientation="vertical"
android:layout_marginBottom="10dp"
android:background="@drawable/background">
Operand type clash: uniqueidentifier is incompatible with int
The reason is that the data doesn't match the datatype. I have come across the same issues that I forgot to make the fields match. Though my case is not same as yours, but it shows the similar error message.
The situation is that I copy a table, but accidently I misspell one field, so I change it using the ALTER after creating the database. And the order of fields in both table is not identical. so when I use the INSERT INTO TableName SELECT * FROM TableName, the result showed the similar errors: Operand type clash: datetime is incompatible with uniqueidentifier
This is a simiple example:
use example
go
create table Test1 (
id int primary key,
item uniqueidentifier,
inserted_at datetime
)
go
create table Test2 (
id int primary key,
inserted_at datetime
)
go
alter table Test2 add item uniqueidentifier;
go
--insert into Test1 (id, item, inserted_at) values (1, newid(), getdate()), (2, newid(), getdate());
insert into Test2 select * from Test1;
select * from Test1;
select * from Test2;
The error message is:
Msg 206, Level 16, State 2, Line 24
Operand type clash: uniqueidentifier is incompatible with datetime
JSON.parse unexpected character error
You can make sure that the object in question is stringified before passing it to parse function by simply using JSON.stringify() .
Updated your line below,
JSON.parse(JSON.stringify({"balance":0,"count":0,"time":1323973673061,"firstname":"howard","userId":5383,"localid":1,"freeExpiration":0,"status":false}));
or if you have JSON stored in some variable:
JSON.parse(JSON.stringify(yourJSONobject));
Android error: Failed to install *.apk on device *: timeout
Try changing the ADB connection timeout. I think it defaults that to 5000ms and I changed mine to 10000ms to get rid of that problem.
If you are in Eclipse, you can do this by going through
Window -> Preferences -> Android -> DDMS -> ADB Connection Timeout (ms)
Forbidden: You don't have permission to access / on this server, WAMP Error
Adding Allow from All didn't worked for me. Then I tried this and it worked.
OS: Windows 8.1
Wamp : 2.5
I added this in the file C:\wamp\bin\apache\apache2.4.9\conf\extra\httpd-vhosts.conf
<VirtualHost *:80>
ServerAdmin [email protected]
DocumentRoot "c:/wamp/www/"
ServerName localhost
ServerAlias localhost
ErrorLog "logs/localhost-error.log"
CustomLog "logs/localhost-access.log" common
</VirtualHost>
Combining CSS Pseudo-elements, ":after" the ":last-child"
Adding another answer to this question because I needed precisely what @derek was asking for and I'd already gotten a bit further before seeing the answers here. Specifically, I needed CSS that could also account for the case with exactly two list items, where the comma is NOT desired. As an example, some authorship bylines I wanted to produce would look like the following:
One author:
By Adam Smith.
Two authors:
By Adam Smith and Jane Doe.
Three authors:
By Adam Smith, Jane Doe, and Frank Underwood.
The solutions already given here work for one author and for 3 or more authors, but neglect to account for the two author case—where the "Oxford Comma" style (also known as "Harvard Comma" style in some parts) doesn't apply - ie, there should be no comma before the conjunction.
After an afternoon of tinkering, I had come up with the following:
<html>
<head>
<style type="text/css">
.byline-list {
list-style: none;
padding: 0;
margin: 0;
}
.byline-list > li {
display: inline;
padding: 0;
margin: 0;
}
.byline-list > li::before {
content: ", ";
}
.byline-list > li:last-child::before {
content: ", and ";
}
.byline-list > li:first-child + li:last-child::before {
content: " and ";
}
.byline-list > li:first-child::before {
content: "By ";
}
.byline-list > li:last-child::after {
content: ".";
}
</style>
</head>
<body>
<ul class="byline-list">
<li>Adam Smith</li>
</ul>
<ul class="byline-list">
<li>Adam Smith</li><li>Jane Doe</li>
</ul>
<ul class="byline-list">
<li>Adam Smith</li><li>Jane Doe</li><li>Frank Underwood</li>
</ul>
</body>
</html>
It displays the bylines as I've got them above.
In the end, I also had to get rid of any whitespace between li elements, in order to get around an annoyance: the inline-block property would otherwise leave a space before each comma. There's probably an alternative decent hack for it but that isn't the subject of this question so I'll leave that for someone else to answer.
Fiddle here: http://jsfiddle.net/5REP2/
Order by descending date - month, day and year
Assuming that you have the power to make schema changes the only acceptable answer to this question IMO is to change the base data type to something more appropriate (e.g. date if SQL Server 2008).
Storing dates as mm/dd/yyyy strings is space inefficient, difficult to validate correctly and makes sorting and date calculations needlessly painful.
E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
In your Dockerfile, run this first:
apt-get update && apt-get install -y gnupg2
Get current index from foreach loop
IEnumerable list = DataGridDetail.ItemsSource as IEnumerable;
List<string> lstFile = new List<string>();
int i = 0;
foreach (var row in list)
{
bool IsChecked = (bool)((CheckBox)DataGridDetail.Columns[0].GetCellContent(row)).IsChecked;
if (IsChecked)
{
MessageBox.show(i);
--Here i want to get the index or current row from the list
}
++i;
}
Reset the database (purge all), then seed a database
I use rake db:reset which drops and then recreates the database and includes your seeds.rb file.
http://guides.rubyonrails.org/migrations.html#resetting-the-database
Using an image caption in Markdown Jekyll
I know this is an old question but I thought I'd still share my method of adding image captions. You won't be able to use the caption or figcaption tags, but this would be a simple alternative without using any plugins.
In your markdown, you can wrap your caption with the emphasis tag and put it directly underneath the image without inserting a new line like so:
*image_caption*
This would generate the following HTML:
<p>
<img src="path_to_image" alt>
<em>image_caption</em>
</p>
Then in your CSS you can style it using the following selector without interfering with other em tags on the page:
img + em { }
Note that you must not have a blank line between the image and the caption because that would instead generate:
<p>
<img src="path_to_image" alt>
</p>
<p>
<em>image_caption</em>
</p>
You can also use whatever tag you want other than em. Just make sure there is a tag, otherwise you won't be able to style it.
Fit cell width to content
There are many ways to do this!
correct me if I'm wrong but the question is looking for this kind of result.
<table style="white-space:nowrap;width:100%;">
<tr>
<td class="block" style="width:50%">this should stretch</td>
<td class="block" style="width:50%">this should stretch</td>
<td class="block" style="width:auto">this should be the content width</td>
</tr>
</table>
The first 2 fields will "share" the remaining page (NOTE: if you add more text to either 50% fields it will take more space), and the last field will dominate the table constantly.
If you are happy to let text wrap you can move white-space:nowrap; to the style of the 3rd field
will be the only way to start a new line in that field.
alternatively, you can set a length on the last field ie. width:150px, and leave percentage's on the first 2 fields.
Hope this helps!
Android: Pass data(extras) to a fragment
I prefer Serializable = no boilerplate code. For passing data to other Fragments or Activities the speed difference to a Parcelable does not matter.
I would also always provide a helper method for a Fragment or Activity, this way you always know, what data has to be passed. Here an example for your ListMusicFragment:
private static final String EXTRA_MUSIC_LIST = "music_list";
public static ListMusicFragment createInstance(List<Music> music) {
ListMusicFragment fragment = new ListMusicFragment();
Bundle bundle = new Bundle();
bundle.putSerializable(EXTRA_MUSIC_LIST, music);
fragment.setArguments(bundle);
return fragment;
}
@Override
public View onCreateView(...) {
...
Bundle bundle = intent.getArguments();
List<Music> musicList = (List<Music>)bundle.getSerializable(EXTRA_MUSIC_LIST);
...
}
Generate SHA hash in C++ using OpenSSL library
C version of @Nayfe code, generating SHA1 hash from file:
#include <stdio.h>
#include <openssl/sha.h>
static const int K_READ_BUF_SIZE = { 1024 * 16 };
unsigned char* calculateSHA1(char *filename)
{
if (!filename) {
return NULL;
}
FILE *fp = fopen(filename, "rb");
if (fp == NULL) {
return NULL;
}
unsigned char* sha1_digest = malloc(sizeof(char)*SHA_DIGEST_LENGTH);
SHA_CTX context;
if(!SHA1_Init(&context))
return NULL;
unsigned char buf[K_READ_BUF_SIZE];
while (!feof(fp))
{
size_t total_read = fread(buf, 1, sizeof(buf), fp);
if(!SHA1_Update(&context, buf, total_read))
{
return NULL;
}
}
fclose(fp);
if(!SHA1_Final(sha1_digest, &context))
return NULL;
return sha1_digest;
}
It can be used as follows:
unsigned char *sha1digest = calculateSHA1("/tmp/file1");
The res variable contains the sha1 hash.
You can print it on the screen using the following for-loop:
char *sha1hash = (char *)malloc(sizeof(char) * 41);
sha1hash[41] = '\0';
int i;
for (i = 0; i < SHA_DIGEST_LENGTH; i++)
{
sprintf(&sha1hash[i*2], "%02x", sha1digest[i]);
}
printf("SHA1 HASH: %s\n", sha1hash);
How to get screen width and height
Alternative way using function
private int[] getScreenSIze(){
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int h = displaymetrics.heightPixels;
int w = displaymetrics.widthPixels;
int[] size={w,h};
return size;
}
on button click or on your create function add the following code
int[] screenSize= getScreenSIze();
int width=screenSize[0];
int height=screenSize[1];
screenSizes.setText("Phone Screen sizes \n\n width = "+width+" \n Height = "+height);
Java method to swap primitives
Apparently I don't have enough reputation points to comment on Dansalmo's answer, but it is a good one, though mis-named. His answer is actually a K-combinator.
int K( int a, int b ) {
return a;
}
The JLS is specific about argument evaluation when passing to methods/ctors/etc. (Was this not so in older specs?)
Granted, this is a functional idiom, but it is clear enough to those who recognize it. (If you don't understand code you find, don't mess with it!)
y = K(x, x=y); // swap x and y
The K-combinator is specifically designed for this kind of thing. AFAIK there's no reason it shouldn't pass a code review.
My $0.02.
Copying Code from Inspect Element in Google Chrome
Click on the line or element you want to copy. Copy to clipboard. Paste.
The only tricky thing is if you click on a line, you get everything that line includes if it was folded. For example if you click on a div, and copy, you get everything that the div includes.
You can also get only what you want by Right Clicking, and select 'Edit as HTML'. This will make that section essentially text, with none of the folding activated. You can then select, copy and paste the relevant bits.
How do I export (and then import) a Subversion repository?
You might find some help on migrating SVN repositories in Chapter 5. Repository Administration, Migrating a repository.
This approach requires access to svnadmin.
Simulating Slow Internet Connection
For Linux, the following list of papers might be useful:
- A Comparative Study of Network Link Emulators (2009)
- KauNet: A Versatile and Flexible Emulation System (2009)
- Dummynet Revisited (2010)
- Measuring Accuracy and Performance of Network Emulators (2015)
Personally, whilst Dummynet is good, I find NetEm to be the most versatile for my use-cases; I'm usually interested in the effect of delays, rather than bandwidth (i.e. WiFi connection issues), and it's super-easy to emulate random packet loss/corruption, etc. It's also very accessible, and free (unlike the hardware-based Linktropy).
On a side-note, for Windows, Clumsy is awesome. I would also like to add that (regarding websites) browser throttling is not an accurate method for emulating real-life network issues (I think "TKK" commented on a few of the reasons why above).
Hope this helps someone!
Determine the path of the executing BASH script
Vlad's code is overquoted. Should be:
MY_PATH=`dirname "$0"`
MY_PATH=`( cd "$MY_PATH" && pwd )`
How do I POST JSON data with cURL?
Try to put your data in a file, say body.json and then use
curl -H "Content-Type: application/json" --data @body.json http://localhost:8080/ui/webapp/conf
Excel VBA - How to Redim a 2D array?
i solved this in a shorter fashion.
Dim marray() as variant, array2() as variant, YY ,ZZ as integer
YY=1
ZZ=1
Redim marray(1 to 1000, 1 to 10)
Do while ZZ<100 ' this is populating the first array
marray(ZZ,YY)= "something"
ZZ=ZZ+1
YY=YY+1
Loop
'this part is where you store your array in another then resize and restore to original
array2= marray
Redim marray(1 to ZZ-1, 1 to YY)
marray = array2
How to Delete node_modules - Deep Nested Folder in Windows
From this looks of this MSDN article, it looks like you can now bypass the MAX_PATH restriction in Windows 10 v1607 (AKA 'anniversary update') by changing a value in the registry - or via Group Policy
Git diff against a stash
Combining what I learned in this thread and in this one, when I want to see "what is inside the stash", I first run:
git stash show stash@{0}
That will show what files were modified. Then, to get a nice visual diff in a difftool, I do:
git difftool --dir-diff stash@{0} stash@{0}^
This will display all the differences at once of the given stash against its parent.
You can configure the diff tool in ~/.gitconfig, e.g. with Meld:
...
[diff]
tool = meld
Concatenating two one-dimensional NumPy arrays
There are several possibilities for concatenating 1D arrays, e.g.,
numpy.r_[a, a],
numpy.stack([a, a]).reshape(-1),
numpy.hstack([a, a]),
numpy.concatenate([a, a])
All those options are equally fast for large arrays; for small ones, concatenate has a slight edge:
The plot was created with perfplot:
import numpy
import perfplot
perfplot.show(
setup=lambda n: numpy.random.rand(n),
kernels=[
lambda a: numpy.r_[a, a],
lambda a: numpy.stack([a, a]).reshape(-1),
lambda a: numpy.hstack([a, a]),
lambda a: numpy.concatenate([a, a]),
],
labels=["r_", "stack+reshape", "hstack", "concatenate"],
n_range=[2 ** k for k in range(19)],
xlabel="len(a)",
)
Make XAMPP / Apache serve file outside of htdocs folder
Ok, per pix0r's, Sparks' and Dave's answers it looks like there are three ways to do this:
Virtual Hosts
- Open C:\xampp\apache\conf\extra\httpd-vhosts.conf.
- Un-comment ~line 19 (
NameVirtualHost *:80). Add your virtual host (~line 36):
<VirtualHost *:80> DocumentRoot C:\Projects\transitCalculator\trunk ServerName transitcalculator.localhost <Directory C:\Projects\transitCalculator\trunk> Order allow,deny Allow from all </Directory> </VirtualHost>Open your hosts file (C:\Windows\System32\drivers\etc\hosts).
Add
127.0.0.1 transitcalculator.localhost #transitCalculatorto the end of the file (before the Spybot - Search & Destroy stuff if you have that installed).
- Save (You might have to save it to the desktop, change the permissions on the old hosts file (right click > properties), and copy the new one into the directory over the old one (or rename the old one) if you are using Vista and have trouble).
- Restart Apache.
Now you can access that directory by browsing to http://transitcalculator.localhost/.
Make an Alias
Starting ~line 200 of your
http.conffile, copy everything between<Directory "C:/xampp/htdocs">and</Directory>(~line 232) and paste it immediately below withC:/xampp/htdocsreplaced with your desired directory (in this caseC:/Projects) to give your server the correct permissions for the new directory.Find the
<IfModule alias_module></IfModule>section (~line 300) and addAlias /transitCalculator "C:/Projects/transitCalculator/trunk"(or whatever is relevant to your desires) below the
Aliascomment block, inside the module tags.
Change your document root
Edit ~line 176 in C:\xampp\apache\conf\httpd.conf; change
DocumentRoot "C:/xampp/htdocs"to#DocumentRoot "C:/Projects"(or whatever you want).Edit ~line 203 to match your new location (in this case
C:/Projects).
Notes:
- You have to use forward slashes "/" instead of back slashes "\".
- Don't include the trailing "/" at the end.
- restart your server.
How to crop an image using PIL?
There is a crop() method:
w, h = yourImage.size
yourImage.crop((0, 30, w, h-30)).save(...)
Linux command-line call not returning what it should from os.system?
using commands module
import commands
"""
Get high load process details
"""
result = commands.getoutput("ps aux | sort -nrk 3,3 | head -n 1")
print result -- python 2x
print (result) -- python 3x
Check if a div exists with jquery
The first is the most concise, I would go with that. The first two are the same, but the first is just that little bit shorter, so you'll save on bytes. The third is plain wrong, because that condition will always evaluate true because the object will never be null or falsy for that matter.
How to run function in AngularJS controller on document ready?
See this post How to execute angular controller function on page load?
For fast lookup:
// register controller in html
<div data-ng-controller="myCtrl" data-ng-init="init()"></div>
// in controller
$scope.init = function () {
// check if there is query in url
// and fire search in case its value is not empty
};
This way, You don't have to wait till document is ready.
Parsing JSON giving "unexpected token o" error
Try parse so:
var yourval = jQuery.parseJSON(JSON.stringify(data));
Git ignore file for Xcode projects
Regarding the 'build' directory exclusion -
If you place your build files in a different directory from your source, as I do, you don't have the folder in the tree to worry about.
This also makes life simpler for sharing your code, preventing bloated backups, and even when you have dependencies to other Xcode projects (while require the builds to be in the same directory as each other)
You can grab an up-to-date copy from the Github gist https://gist.github.com/708713
My current .gitignore file is
# Mac OS X
*.DS_Store
# Xcode
*.pbxuser
*.mode1v3
*.mode2v3
*.perspectivev3
*.xcuserstate
project.xcworkspace/
xcuserdata/
# Generated files
*.o
*.pyc
#Python modules
MANIFEST
dist/
build/
# Backup files
*~.nib
Inserting values into tables Oracle SQL
You can insert into a table from a SELECT.
INSERT INTO
Employee (emp_id, emp_name, emp_address, emp_state, emp_position, emp_manager)
SELECT
001,
'John Doe',
'1 River Walk, Green Street',
(SELECT id FROM state WHERE name = 'New York'),
(SELECT id FROM positions WHERE name = 'Sales Executive'),
(SELECT id FROM manager WHERE name = 'Barry Green')
FROM
dual
Or, similarly...
INSERT INTO
Employee (emp_id, emp_name, emp_address, emp_state, emp_position, emp_manager)
SELECT
001,
'John Doe',
'1 River Walk, Green Street',
state.id,
positions.id,
manager.id
FROM
state
CROSS JOIN
positions
CROSS JOIN
manager
WHERE
state.name = 'New York'
AND positions.name = 'Sales Executive'
AND manager.name = 'Barry Green'
Though this one does assume that all the look-ups exist. If, for example, there is no position name 'Sales Executive', nothing would get inserted with this version.
Disabling the long-running-script message in Internet Explorer
In my case, while playing video, I needed to call a function everytime currentTime of video updates. So I used timeupdate event of video and I came to know that it was fired at least 4 times a second (depends on the browser you use, see this). So I changed it to call a function every second like this:
var currentIntTime = 0;
var someFunction = function() {
currentIntTime++;
// Do something here
}
vidEl.on('timeupdate', function(){
if(parseInt(vidEl.currentTime) > currentIntTime) {
someFunction();
}
});
This reduces calls to someFunc by at least 1/3 and it may help your browser to behave normally. It did for me !!!
NGinx Default public www location?
The default web folder for nginx depends on how you installed it, but normally it's in these locations:
/usr/local/nginx/html
/usr/nginx/html
How can I capture packets in Android?
Option 1 - Android PCAP
Limitation
Android PCAP should work so long as:
Your device runs Android 4.0 or higher (or, in theory, the few devices which run Android 3.2). Earlier versions of Android do not have a USB Host API
Option 2 - TcpDump
Limitation
Phone should be rooted
Option 3 - bitshark (I would prefer this)
Limitation
Phone should be rooted
Reason - the generated PCAP files can be analyzed in WireShark which helps us in doing the analysis.
Other Options without rooting your phone
- tPacketCapture
https://play.google.com/store/apps/details?id=jp.co.taosoftware.android.packetcapture&hl=en
Advantages
Using tPacketCapture is very easy, captured packet save into a PCAP file that can be easily analyzed by using a network protocol analyzer application such as Wireshark.
- You can route your android mobile traffic to PC and capture the traffic in the desktop using any network sniffing tool.
http://lifehacker.com/5369381/turn-your-windows-7-pc-into-a-wireless-hotspot
Uncaught SyntaxError: Unexpected token :
Seeing red errors
Uncaught SyntaxError: Unexpected token <
in your Chrome developer's console tab is an indication of HTML in the response body.
What you're actually seeing is your browser's reaction to the unexpected top line <!DOCTYPE html> from the server.
Unbound classpath container in Eclipse
The problem happens when you
- Import project folders into the eclipse workspace.(when projects use different Jre).
- Update or Reinstall eclipse
- Change Jre or Build related Settings.
- Or by there is a configuration mismatch.
You get two errors for each misconfigured files.
- The project cannot be built until build path errors are resolved.
- Unbound classpath container: 'JRE System Library.
If the no. of projects having problem is few:
- Select each project and apply Quick fix(Ctrl+1)
- Either Replace the project's JRE with default JRE or Specify Alternate JRE (or JDK).
You can do the same by right-click project-->Properties(from context menu)-->Java Build Path-->Libraries-->select current unbound library -->Remove-->Add Libraries-->Jre System library-->select default or alternate Jre.
Or directly choose Build Path-->Add libraries in project's context menu.
But the best way to get rid of such problem when you have many projects is:
EITHER
- Open the current workspace (in which your project is) in File Explorer.
- Delete all org.eclipse.jdt.core.prefs file present in .settings folder of your imported projects.(Be careful while deleting. Don't delete any files or folders inside .metadata folder.)**
- Now,Select the .classpath files of projects (those with errors) and open them in a powerful text editor(such as Notepad++).
- Find the line similar to
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>and replace it with<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>- Save all the files. And Refresh or restart Eclipse IDE. All the problems are gone.
OR
Get the JRE used by the projects and install on your computer and then specify it..
Is there any way to debug chrome in any IOS device
Old Answer (July 2016):
You can't directly debug Chrome for iOS due to restrictions on the published WKWebView apps, but there are a few options already discussed in other SO threads:
If you can reproduce the issue in Safari as well, then use Remote Debugging with Safari Web Inspector. This would be the easiest approach.
WeInRe allows some simple debugging, using a simple client-server model. It's not fully featured, but it may well be enough for your problem. See instructions on set up here.
You could try and create a simple
WKWebViewbrowser app (some instructions here), or look for an existing one on GitHub. Since Chrome uses the same rendering engine, you could debug using that, as it will be close to what Chrome produces.
There's a "bug" opened up for WebKit: Allow Web Inspector usage for release builds of WKWebView. If and when we get an API to WKWebView, Chrome for iOS would be debuggable.
Update January 2018:
Since my answer back in 2016, some work has been done to improve things.
There is a recent project called RemoteDebug iOS WebKit Adapter, by some of the Microsoft team. It's an adapter that handles the API differences between Webkit Remote Debugging Protocol and Chrome Debugging Protocol, and this allows you to debug iOS WebViews in any app that supports the protocol - Chrome DevTools, VS Code etc.
Check out the getting started guide in the repo, which is quite detailed.
If you are interesting, you can read up on the background and architecture here.
PHP create key => value pairs within a foreach
Something like this?
foreach ($Offer as $key => $value) {
$offerArray[$key] = $value[4];
}
Delete duplicate records from a SQL table without a primary key
It is very simple. I tried in SQL Server 2008
DELETE SUB FROM
(SELECT ROW_NUMBER() OVER (PARTITION BY EmpId, EmpName, EmpSSN ORDER BY EmpId) cnt
FROM Employee) SUB
WHERE SUB.cnt > 1
Read properties file outside JAR file
So, you want to treat your .properties file on the same folder as the main/runnable jar as a file rather than as a resource of the main/runnable jar. In that case, my own solution is as follows:
First thing first: your program file architecture shall be like this (assuming your main program is main.jar and its main properties file is main.properties):
./ - the root of your program
|__ main.jar
|__ main.properties
With this architecture, you can modify any property in the main.properties file using any text editor before or while your main.jar is running (depending on the current state of the program) since it is just a text-based file. For example, your main.properties file may contain:
app.version=1.0.0.0
app.name=Hello
So, when you run your main program from its root/base folder, normally you will run it like this:
java -jar ./main.jar
or, straight away:
java -jar main.jar
In your main.jar, you need to create a few utility methods for every property found in your main.properties file; let say the app.version property will have getAppVersion() method as follows:
/**
* Gets the app.version property value from
* the ./main.properties file of the base folder
*
* @return app.version string
* @throws IOException
*/
import java.util.Properties;
public static String getAppVersion() throws IOException{
String versionString = null;
//to load application's properties, we use this class
Properties mainProperties = new Properties();
FileInputStream file;
//the base folder is ./, the root of the main.properties file
String path = "./main.properties";
//load the file handle for main.properties
file = new FileInputStream(path);
//load all the properties from this file
mainProperties.load(file);
//we have loaded the properties, so close the file handle
file.close();
//retrieve the property we are intrested, the app.version
versionString = mainProperties.getProperty("app.version");
return versionString;
}
In any part of the main program that needs the app.version value, we call its method as follows:
String version = null;
try{
version = getAppVersion();
}
catch (IOException ioe){
ioe.printStackTrace();
}
How to use matplotlib tight layout with Figure?
Just call fig.tight_layout() as you normally would. (pyplot is just a convenience wrapper. In most cases, you only use it to quickly generate figure and axes objects and then call their methods directly.)
There shouldn't be a difference between the QtAgg backend and the default backend (or if there is, it's a bug).
E.g.
import matplotlib.pyplot as plt
#-- In your case, you'd do something more like:
# from matplotlib.figure import Figure
# fig = Figure()
#-- ...but we want to use it interactive for a quick example, so
#-- we'll do it this way
fig, axes = plt.subplots(nrows=4, ncols=4)
for i, ax in enumerate(axes.flat, start=1):
ax.set_title('Test Axes {}'.format(i))
ax.set_xlabel('X axis')
ax.set_ylabel('Y axis')
plt.show()
Before Tight Layout
After Tight Layout
import matplotlib.pyplot as plt
fig, axes = plt.subplots(nrows=4, ncols=4)
for i, ax in enumerate(axes.flat, start=1):
ax.set_title('Test Axes {}'.format(i))
ax.set_xlabel('X axis')
ax.set_ylabel('Y axis')
fig.tight_layout()
plt.show()
Clear the form field after successful submission of php form
They remain in the fields because you are explicitly telling PHP to fill the form with the submitted data.
<input name="firstname" type="text" placeholder="First Name" required="required"
value="<?php echo $_POST['firstname'];?>">
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ HERE
Just remove this, or if you want a condition to not do so make a if statement to that echo or just cleanup the $_POST fields.
$_POST = array(); // lets pretend nothing was posted
Or, if successful, redirect the user to another page:
header("Location: success.html");
exit; // Location header is set, pointless to send HTML, stop the script
Which by the way is the prefered method. If you keep the user in a page that was reached through a POST method, if he refreshes the page the form will be submitted again.
disable editing default value of text input
I don't think all the other answerers understood the question correctly. The question requires disabling editing part of the text. One solution I can think of is simulating a textbox with a fixed prefix which is not part of the textarea or input.
An example of this approach is:
<div style="border:1px solid gray; color:#999999; font-family:arial; font-size:10pt; width:200px; white-space:nowrap;">Default Notes<br/>
<textarea style="border:0px solid black;" cols="39" rows="5"></textarea></div>
The other approach, which I end up using is using JS and JQuery to simulate "Disable" feature. Example with pseudo-code (cannot be specific cause of legal issue):
// disable existing notes by preventing keystroke
document.getElementById("txtNotes").addEventListener('keydown', function (e) {
if (cursorLocation < defaultNoteLength ) {
e.preventDefault();
});
// disable existing notes by preventing right click
document.addEventListener('contextmenu', function (e) {
if (cursorLocation < defaultNoteLength )
e.preventDefault();
});
Thanks, Carsten, for mentioning that this question is old, but I found that the solution might help other people in the future.
How to jump to top of browser page
// When the user scrolls down 20px from the top of the document, show the button_x000D_
window.onscroll = function() {scrollFunction()};_x000D_
_x000D_
function scrollFunction() {_x000D_
if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {_x000D_
document.getElementById("myBtn").style.display = "block";_x000D_
} else {_x000D_
document.getElementById("myBtn").style.display = "none";_x000D_
}_x000D_
_x000D_
}_x000D_
_x000D_
// When the user clicks on the button, scroll to the top of the document_x000D_
function topFunction() {_x000D_
_x000D_
$('html, body').animate({scrollTop:0}, 'slow');_x000D_
}body {_x000D_
font-family: Arial, Helvetica, sans-serif;_x000D_
font-size: 20px;_x000D_
}_x000D_
_x000D_
#myBtn {_x000D_
display: none;_x000D_
position: fixed;_x000D_
bottom: 20px;_x000D_
right: 30px;_x000D_
z-index: 99;_x000D_
font-size: 18px;_x000D_
border: none;_x000D_
outline: none;_x000D_
background-color: red;_x000D_
color: white;_x000D_
cursor: pointer;_x000D_
padding: 15px;_x000D_
border-radius: 4px;_x000D_
}_x000D_
_x000D_
#myBtn:hover {_x000D_
background-color: #555;_x000D_
}<script src="https://code.jquery.com/jquery-1.10.2.js"></script>_x000D_
_x000D_
<button onclick="topFunction()" id="myBtn" title="Go to top">Top</button>_x000D_
_x000D_
<div style="background-color:black;color:white;padding:30px">Scroll Down</div>_x000D_
<div style="background-color:lightgrey;padding:30px 30px 2500px">This example demonstrates how to create a "scroll to top" button that becomes visible when the user starts to scroll the page.</div>When do Java generics require <? extends T> instead of <T> and is there any downside of switching?
I know this is an old question but I want to share an example that I think explains bounded wildcards pretty well. java.util.Collections offers this method:
public static <T> void sort(List<T> list, Comparator<? super T> c) {
list.sort(c);
}
If we have a List of T, the List can, of course, contain instances of types that extend T. If the List contains Animals, the List can contain both Dogs and Cats (both Animals). Dogs have a property "woofVolume" and Cats have a property "meowVolume." While we might like to sort based upon these properties particular to subclasses of T, how can we expect this method to do that? A limitation of Comparator is that it can compare only two things of only one type (T). So, requiring simply a Comparator<T> would make this method usable. But, the creator of this method recognized that if something is a T, then it is also an instance of the superclasses of T. Therefore, he allows us to use a Comparator of T or any superclass of T, i.e. ? super T.
Fetch: POST json data
With ES2017 async/await support, this is how to POST a JSON payload:
(async () => {_x000D_
const rawResponse = await fetch('https://httpbin.org/post', {_x000D_
method: 'POST',_x000D_
headers: {_x000D_
'Accept': 'application/json',_x000D_
'Content-Type': 'application/json'_x000D_
},_x000D_
body: JSON.stringify({a: 1, b: 'Textual content'})_x000D_
});_x000D_
const content = await rawResponse.json();_x000D_
_x000D_
console.log(content);_x000D_
})();Can't use ES2017? See @vp_art's answer using promises
The question however is asking for an issue caused by a long since fixed chrome bug.
Original answer follows.
chrome devtools doesn't even show the JSON as part of the request
This is the real issue here, and it's a bug with chrome devtools, fixed in Chrome 46.
That code works fine - it is POSTing the JSON correctly, it just cannot be seen.
I'd expect to see the object I've sent back
that's not working because that is not the correct format for JSfiddle's echo.
The correct code is:
var payload = {
a: 1,
b: 2
};
var data = new FormData();
data.append( "json", JSON.stringify( payload ) );
fetch("/echo/json/",
{
method: "POST",
body: data
})
.then(function(res){ return res.json(); })
.then(function(data){ alert( JSON.stringify( data ) ) })
For endpoints accepting JSON payloads, the original code is correct
Is there a need for range(len(a))?
Sometimes matplotlib requires range(len(y)), e.g., while y=array([1,2,5,6]), plot(y) works fine, scatter(y) does not. One has to write scatter(range(len(y)),y). (Personally, I think this is a bug in scatter; plot and its friends scatter and stem should use the same calling sequences as much as possible.)
TreeMap sort by value
You can't have the TreeMap itself sort on the values, since that defies the SortedMap specification:
A
Mapthat further provides a total ordering on its keys.
However, using an external collection, you can always sort Map.entrySet() however you wish, either by keys, values, or even a combination(!!) of the two.
Here's a generic method that returns a SortedSet of Map.Entry, given a Map whose values are Comparable:
static <K,V extends Comparable<? super V>>
SortedSet<Map.Entry<K,V>> entriesSortedByValues(Map<K,V> map) {
SortedSet<Map.Entry<K,V>> sortedEntries = new TreeSet<Map.Entry<K,V>>(
new Comparator<Map.Entry<K,V>>() {
@Override public int compare(Map.Entry<K,V> e1, Map.Entry<K,V> e2) {
int res = e1.getValue().compareTo(e2.getValue());
return res != 0 ? res : 1;
}
}
);
sortedEntries.addAll(map.entrySet());
return sortedEntries;
}
Now you can do the following:
Map<String,Integer> map = new TreeMap<String,Integer>();
map.put("A", 3);
map.put("B", 2);
map.put("C", 1);
System.out.println(map);
// prints "{A=3, B=2, C=1}"
System.out.println(entriesSortedByValues(map));
// prints "[C=1, B=2, A=3]"
Note that funky stuff will happen if you try to modify either the SortedSet itself, or the Map.Entry within, because this is no longer a "view" of the original map like entrySet() is.
Generally speaking, the need to sort a map's entries by its values is atypical.
Note on == for Integer
Your original comparator compares Integer using ==. This is almost always wrong, since == with Integer operands is a reference equality, not value equality.
System.out.println(new Integer(0) == new Integer(0)); // prints "false"!!!
Related questions
How do I reset the setInterval timer?
If by "restart", you mean to start a new 4 second interval at this moment, then you must stop and restart the timer.
function myFn() {console.log('idle');}
var myTimer = setInterval(myFn, 4000);
// Then, later at some future time,
// to restart a new 4 second interval starting at this exact moment in time
clearInterval(myTimer);
myTimer = setInterval(myFn, 4000);
You could also use a little timer object that offers a reset feature:
function Timer(fn, t) {
var timerObj = setInterval(fn, t);
this.stop = function() {
if (timerObj) {
clearInterval(timerObj);
timerObj = null;
}
return this;
}
// start timer using current settings (if it's not already running)
this.start = function() {
if (!timerObj) {
this.stop();
timerObj = setInterval(fn, t);
}
return this;
}
// start with new or original interval, stop current interval
this.reset = function(newT = t) {
t = newT;
return this.stop().start();
}
}
Usage:
var timer = new Timer(function() {
// your function here
}, 5000);
// switch interval to 10 seconds
timer.reset(10000);
// stop the timer
timer.stop();
// start the timer
timer.start();
Working demo: https://jsfiddle.net/jfriend00/t17vz506/
How do I use grep to search the current directory for all files having the a string "hello" yet display only .h and .cc files?
find . -name \*.cc -print0 -or -name \*.h -print0 | xargs -0 grep "hello".
Check the manual pages for find and xargs for details.
DateTimePicker: pick both date and time
You can get it to display time. From that you will probably have to have two controls (one date, one time) the accomplish what you want.
How do I combine two lists into a dictionary in Python?
dict(zip([1,2,3,4], [a,b,c,d]))
If the lists are big you should use itertools.izip.
If you have more keys than values, and you want to fill in values for the extra keys, you can use itertools.izip_longest.
Here, a, b, c, and d are variables -- it will work fine (so long as they are defined), but you probably meant ['a','b','c','d'] if you want them as strings.
zip takes the first item from each iterable and makes a tuple, then the second item from each, etc. etc.
dict can take an iterable of iterables, where each inner iterable has two items -- it then uses the first as the key and the second as the value for each item.
how to get rid of notification circle in right side of the screen?
This stuff comes from ES file explorer
Just go into this app > settings
Then there is an option that says logging floating window, you just need to disable that and you will get rid of this infernal bubble for good
Simple check for SELECT query empty result
well there is a way to do it a little more code but really effective
$sql = "SELECT * FROM messages"; //your query_x000D_
$result=$connvar->query($sql); //$connvar is the connection variable_x000D_
$flag=0;_x000D_
while($rows2=mysqli_fetch_assoc($result2))_x000D_
{ $flag++;}_x000D_
_x000D_
if($flag==0){no rows selected;}_x000D_
else{_x000D_
echo $flag." "."rows are selected"_x000D_
}How do I mock an open used in a with statement (using the Mock framework in Python)?
Python 3
Patch builtins.open and use mock_open, which is part of the mock framework. patch used as a context manager returns the object used to replace the patched one:
from unittest.mock import patch, mock_open
with patch("builtins.open", mock_open(read_data="data")) as mock_file:
assert open("path/to/open").read() == "data"
mock_file.assert_called_with("path/to/open")
If you want to use patch as a decorator, using mock_open()'s result as the new= argument to patch can be a little bit weird. Instead, use patch's new_callable= argument and remember that every extra argument that patch doesn't use will be passed to the new_callable function, as described in the patch documentation:
patch()takes arbitrary keyword arguments. These will be passed to theMock(or new_callable) on construction.
@patch("builtins.open", new_callable=mock_open, read_data="data")
def test_patch(mock_file):
assert open("path/to/open").read() == "data"
mock_file.assert_called_with("path/to/open")
Remember that in this case patch will pass the mocked object as an argument to your test function.
Python 2
You need to patch __builtin__.open instead of builtins.open and mock is not part of unittest, you need to pip install and import it separately:
from mock import patch, mock_open
with patch("__builtin__.open", mock_open(read_data="data")) as mock_file:
assert open("path/to/open").read() == "data"
mock_file.assert_called_with("path/to/open")
Early exit from function?
Using a return will stop the function and return undefined, or the value that you specify with the return command.
function myfunction(){
if(a=="stop"){
//return undefined;
return; /** Or return "Hello" or any other value */
}
}
Spring application context external properties?
One way to do it is to add your external config folder to the classpath of the java process. That's how I've often done it in the past.
Remove carriage return from string
Since you're using VB.NET, you'll need the following code:
Dim newString As String = origString.Replace(vbCr, "").Replace(vbLf, "")
You could use escape characters (\r and \n) in C#, but these won't work in VB.NET. You have to use the equivalent constants (vbCr and vbLf) instead.
Convert object string to JSON
You have to write round brackets, because without them eval will consider code inside curly brackets as block of commands.
var i = eval("({ hello: 'world', places: ['Africa', 'America', 'Asia', 'Australia'] })");
How to create temp table using Create statement in SQL Server?
Same thing, Just start the table name with # or ##:
CREATE TABLE #TemporaryTable -- Local temporary table - starts with single #
(
Col1 int,
Col2 varchar(10)
....
);
CREATE TABLE ##GlobalTemporaryTable -- Global temporary table - note it starts with ##.
(
Col1 int,
Col2 varchar(10)
....
);
Temporary table names start with # or ## - The first is a local temporary table and the last is a global temporary table.
Here is one of many articles describing the differences between them.
Could not obtain information about Windows NT group user
I was having the same issue, which turned out to be caused by the Domain login that runs the SQL service being locked out in AD. The lockout was caused by an unrelated usage of the service account for another purpose with the wrong password.
The errors received from SQL Agent logs did not mention the service account's name, just the name of the user (job owner) that couldn't be authenticated (since it uses the service account to check with AD).