Everything in the java.lang
package is implicitly imported (including String) and you do not need to do so yourself. This is simply a feature of the Java language. ArrayList and HashMap are however in the java.util
package, which is not implicitly imported.
The package java.lang mostly includes essential features, such a class version of primitives, basic exceptions and the Object class. This being integral to most programs, forcing people to import them is redundant and thus the contents of this package are implicitly imported.
I looked into this before buying a Mac Mini. The answer is, essentially, no. You pretty much have to buy a Leopard Mac to do iPhone SDK development for apps that run on non-jailbroken iPhones.
Not that it's 100% impossible, but it's 99.99% unreasonable. Like changing light bulbs with your feet.
Not only do you have to be in Xcode, but you have to get certificates into the Keychain manager to be able to have Xcode and the iPhone communicate. And you have to set all kinds of setting in Xcode just right.
Yes to output {
in string.Format
you have to escape it like this {{
So this
String val = "1,2,3";
String.Format(" foo {{{0}}}", val);
will output "foo {1,2,3}"
.
BUT you have to know about a design bug in C# which is that by going on the above logic you would assume this below code will print {24.00}
int i = 24;
string str = String.Format("{{{0:N}}}", i); //gives '{N}' instead of {24.00}
But this prints {N}. This is because the way C# parses escape sequences and format characters. To get the desired value in the above case you have to use this instead.
String.Format("{0}{1:N}{2}", "{", i, "}") //evaluates to {24.00}
Reference Articles String.Format gottach and String Formatting FAQ
To find the Kafka Version, We can use the jps
command which show all the java processes running on the machine.
Step 1: Let's say, you are running Kafka as the root user, so login to your machine with root and use jps -m
. It will show the result like
4979 Jps -m
9434 Kafka config/server.properties
Step 2: From the above result, you can take the PID for Kafka application and use pwdx 9434
which reports the current directory of the process. the result will be like
9434: /apps/kafka_2.12-2.4.0
here you can see the Kafka version which is 2.12-2.4.0
It ignores the cached content when refreshing...
https://support.google.com/a/answer/3001912?hl=en
F5 or Control + R = Reload the current page
Control+Shift+R or Shift + F5 = Reload your current page, ignoring cached content
render: ->
<a className="upvotes" onClick={(e) => {this.upvote(e); }}>upvote</a>
There is no direct HTML solution for the task for now. Even HTML Imports (which is permanently in draft) will not do the thing, because Import != Include and some JS magic will be required anyway.
I recently wrote a VanillaJS script that is just for inclusion HTML into HTML, without any complications.
Just place in your a.html
<link data-wi-src="b.html" />
<!-- ... and somewhere below is ref to the script ... -->
<script src="wm-html-include.js"> </script>
It is open-source
and may give an idea (I hope)
import os
from PIL import Image
from PIL import ImageFile
import imagehash
#just use to the size diferent picture
def compare_image(img_file1, img_file2):
if img_file1 == img_file2:
return True
fp1 = open(img_file1, 'rb')
fp2 = open(img_file2, 'rb')
img1 = Image.open(fp1)
img2 = Image.open(fp2)
ImageFile.LOAD_TRUNCATED_IMAGES = True
b = img1 == img2
fp1.close()
fp2.close()
return b
#through picturu hash to compare
def get_hash_dict(dir):
hash_dict = {}
image_quantity = 0
for _, _, files in os.walk(dir):
for i, fileName in enumerate(files):
with open(dir + fileName, 'rb') as fp:
hash_dict[dir + fileName] = imagehash.average_hash(Image.open(fp))
image_quantity += 1
return hash_dict, image_quantity
def compare_image_with_hash(image_file_name_1, image_file_name_2, max_dif=0):
"""
max_dif: The maximum hash difference is allowed, the smaller and more accurate, the minimum is 0.
recommend to use
"""
ImageFile.LOAD_TRUNCATED_IMAGES = True
hash_1 = None
hash_2 = None
with open(image_file_name_1, 'rb') as fp:
hash_1 = imagehash.average_hash(Image.open(fp))
with open(image_file_name_2, 'rb') as fp:
hash_2 = imagehash.average_hash(Image.open(fp))
dif = hash_1 - hash_2
if dif < 0:
dif = -dif
if dif <= max_dif:
return True
else:
return False
def compare_image_dir_with_hash(dir_1, dir_2, max_dif=0):
"""
max_dif: The maximum hash difference is allowed, the smaller and more accurate, the minimum is 0.
"""
ImageFile.LOAD_TRUNCATED_IMAGES = True
hash_dict_1, image_quantity_1 = get_hash_dict(dir_1)
hash_dict_2, image_quantity_2 = get_hash_dict(dir_2)
if image_quantity_1 > image_quantity_2:
tmp = image_quantity_1
image_quantity_1 = image_quantity_2
image_quantity_2 = tmp
tmp = hash_dict_1
hash_dict_1 = hash_dict_2
hash_dict_2 = tmp
result_dict = {}
for k in hash_dict_1.keys():
result_dict[k] = None
for dif_i in range(0, max_dif + 1):
have_none = False
for k_1 in result_dict.keys():
if result_dict.get(k_1) is None:
have_none = True
if not have_none:
return result_dict
for k_1, v_1 in hash_dict_1.items():
for k_2, v_2 in hash_dict_2.items():
sub = (v_1 - v_2)
if sub < 0:
sub = -sub
if sub == dif_i and result_dict.get(k_1) is None:
result_dict[k_1] = k_2
break
return result_dict
def main():
print(compare_image('image1\\815.jpg', 'image2\\5.jpg'))
print(compare_image_with_hash('image1\\815.jpg', 'image2\\5.jpg', 7))
r = compare_image_dir_with_hash('image1\\', 'image2\\', 10)
for k in r.keys():
print(k, r.get(k))
if __name__ == '__main__':
main()
source: @mokagio
Intrinsic Content Size - Pretty self-explanatory, but views with variable content are aware of how big their content is and describe their content's size through this property. Some obvious examples of views that have intrinsic content sizes are UIImageViews, UILabels, UIButtons.
Content Hugging Priority - The higher this priority is, the more a view resists growing larger than its intrinsic content size.
Content Compression Resistance Priority - The higher this priority is, the more a view resists shrinking smaller than its intrinsic content size.
Check here for more explanation: AUTO LAYOUT MAGIC: CONTENT SIZING PRIORITIES
I was able to resolve this problem by cleaning my assets cache:
$ rake assets:clean
Also you can pipe the answers to the script:
printf "y\npassword\n" | sh test.sh
where \n
is escape-sequence
Yea, java is Garbage collected, it will delete the memory for you.
It is strange, that no one yet has suggested the most robust way of closing a feature branches... You can just combine merge commit with --close-branch flag (i.e. commit modified files and close the branch simultaneously):
hg up feature-x
hg merge default
hg ci -m "Merge feature-x and close branch" --close-branch
hg branch default -f
So, that is all. No one extra head on revgraph. No extra commit.
From what I understand, Python lists are already quite similar to ArrayLists. But if you want to tweak those parameters I found this post on the Internet that may be interesting (basically, just create your own ScalableList
extension):
http://mail.python.org/pipermail/python-list/2000-May/035082.html
With the Entity Framework most of the time SaveChanges()
is sufficient. This creates a transaction, or enlists in any ambient transaction, and does all the necessary work in that transaction.
Sometimes though the SaveChanges(false) + AcceptAllChanges()
pairing is useful.
The most useful place for this is in situations where you want to do a distributed transaction across two different Contexts.
I.e. something like this (bad):
using (TransactionScope scope = new TransactionScope())
{
//Do something with context1
//Do something with context2
//Save and discard changes
context1.SaveChanges();
//Save and discard changes
context2.SaveChanges();
//if we get here things are looking good.
scope.Complete();
}
If context1.SaveChanges()
succeeds but context2.SaveChanges()
fails the whole distributed transaction is aborted. But unfortunately the Entity Framework has already discarded the changes on context1
, so you can't replay or effectively log the failure.
But if you change your code to look like this:
using (TransactionScope scope = new TransactionScope())
{
//Do something with context1
//Do something with context2
//Save Changes but don't discard yet
context1.SaveChanges(false);
//Save Changes but don't discard yet
context2.SaveChanges(false);
//if we get here things are looking good.
scope.Complete();
context1.AcceptAllChanges();
context2.AcceptAllChanges();
}
While the call to SaveChanges(false)
sends the necessary commands to the database, the context itself is not changed, so you can do it again if necessary, or you can interrogate the ObjectStateManager
if you want.
This means if the transaction actually throws an exception you can compensate, by either re-trying or logging state of each contexts ObjectStateManager
somewhere.
If both "document.ready" variants are used they will both fire, in the order of appearance
$(function(){
alert('shorthand document.ready');
});
//try changing places
$(document).ready(function(){
alert('document.ready');
});
Enabling a previously-installed Sublime Text package
If you have a subdirectory under Sublime Text 2\Packages
for a package that isn't working, you may need to enable it.
Follow these steps to enable an installed package:
Preferences > Package Control > Enable Package
You could provide your function with the object and its attribute. Next, do what you need to do inside the function. Finally, assign the value returned in the promise to the right place in your object. Here's an example:
let myFunction = function (vm, feed) {
getFeed().then( data => {
vm[feed] = data
})
}
myFunction(vm, "feed")
You can also write a self-invoking function if you want.
If you are dealing with money I suggest checking the Money design pattern (originally from Martin Fowler's book on enterprise architectural design).
I suggest reading this link for the motivation: http://wiki.moredesignpatterns.com/space/Value+Object+Motivation+v2
Subprocess is based on popen2, and as such has a number of advantages - there's a full list in the PEP here, but some are:
As @Bozho says, you probably want to use getScaledInstance
.
To understand how grph.scale(2.0, 2.0)
works however, you could have a look at this code:
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
class Main {
public static void main(String[] args) throws IOException {
final int SCALE = 2;
Image img = new ImageIcon("duke.png").getImage();
BufferedImage bi = new BufferedImage(SCALE * img.getWidth(null),
SCALE * img.getHeight(null),
BufferedImage.TYPE_INT_ARGB);
Graphics2D grph = (Graphics2D) bi.getGraphics();
grph.scale(SCALE, SCALE);
// everything drawn with grph from now on will get scaled.
grph.drawImage(img, 0, 0, null);
grph.dispose();
ImageIO.write(bi, "png", new File("duke_double_size.png"));
}
}
Given duke.png:
it produces duke_double_size.png:
Using the Excel Text import wizard to import it if it is a text file, like a CSV file, is another option and can be done based on which row number to which row numbers you specify. See: This link
The csh
shell has never been known for its extensive ability to manipulate file handles in the redirection process.
You can redirect both standard output and error to a file with:
xxx >& filename
but that's not quite what you were after, redirecting standard error to the current standard output.
However, if your underlying operating system exposes the standard output of a process in the file system (as Linux does with /dev/stdout
), you can use that method as follows:
xxx >& /dev/stdout
This will force both standard output and standard error to go to the same place as the current standard output, effectively what you have with the bash
redirection, 2>&1
.
Just keep in mind this isn't a csh
feature. If you run on an operating system that doesn't expose standard output as a file, you can't use this method.
However, there is another method. You can combine the two streams into one if you send it to a pipeline with |&
, then all you need to do is find a pipeline component that writes its standard input to its standard output. In case you're unaware of such a thing, that's exactly what cat
does if you don't give it any arguments. Hence, you can achieve your ends in this specific case with:
xxx |& cat
Of course, there's also nothing stopping you from running bash
(assuming it's on the system somewhere) within a csh
script to give you the added capabilities. Then you can use the rich redirections of that shell for the more complex cases where csh
may struggle.
Let's explore this in more detail. First, create an executable echo_err
that will write a string to stderr
:
#include <stdio.h>
int main (int argc, char *argv[]) {
fprintf (stderr, "stderr (%s)\n", (argc > 1) ? argv[1] : "?");
return 0;
}
Then a control script test.csh
which will show it in action:
#!/usr/bin/csh
ps -ef ; echo ; echo $$ ; echo
echo 'stdout (csh)'
./echo_err csh
bash -c "( echo 'stdout (bash)' ; ./echo_err bash ) 2>&1"
The echo
of the PID and ps
are simply so you can ensure it's csh
running this script. When you run this script with:
./test.csh >test.out 2>test.err
(the initial redirection is set up by bash
before csh
starts running the script), and examine the out/err
files, you see:
test.out:
UID PID PPID TTY STIME COMMAND
pax 5708 5364 cons0 11:31:14 /usr/bin/ps
pax 5364 7364 cons0 11:31:13 /usr/bin/tcsh
pax 7364 1 cons0 10:44:30 /usr/bin/bash
5364
stdout (csh)
stdout (bash)
stderr (bash)
test.err:
stderr (csh)
You can see there that the test.csh
process is running in the C shell, and that calling bash
from within there gives you the full bash
power of redirection.
The 2>&1
in the bash
command quite easily lets you redirect standard error to the current standard output (as desired) without prior knowledge of where standard output is currently going.
It means that the field is (part of) a non-unique index. You can issue
show create table <table>;
To see more information about the table structure.
To the best of my memory, a physical address is an explicit, set in stone address in memory, while a logical address consists of a base pointer and offset.
The reason is as you have basically specified. It allows for not only the segmentation of programs and processes into threads and data, but also for the dynamic loading of such programs, and the allowance for at least pseudo-parallelism, without any actual interlacing of instructions in memory needing to take place.
This is untested but will probably work.
In your .htaccess file put:
<Files ~ "\.html?$">
Header set Content-Type "text/html; charset=utf-8"
</Files>
However, this will require mod_headers on the server.
Old question but throwing my solution into the ring for completeness. I needed this when I needed a specific find but a different create if it doesn't exist.
def self.find_by_or_create_with(args, attributes) # READ CAREFULLY! args for finding, attributes for creating!
obj = self.find_or_initialize_by(args)
return obj if obj.persisted?
return obj if obj.update_attributes(attributes)
end
add this code to your project
public static class Extension {
public static string TextAfter(this string value ,string search) {
return value.Substring(value.IndexOf(search) + search.Length);
}
}
then use
"code : string text ".TextAfter(":")
Here's my only-somewhat-contrived example of a case where the null
key can be useful:
public class Timer {
private static final Logger LOG = Logger.getLogger(Timer.class);
private static final Map<String, Long> START_TIMES = new HashMap<String, Long>();
public static synchronized void start() {
long now = System.currentTimeMillis();
if (START_TIMES.containsKey(null)) {
LOG.warn("Anonymous timer was started twice without being stopped; previous timer has run for " + (now - START_TIMES.get(null).longValue()) +"ms");
}
START_TIMES.put(null, now);
}
public static synchronized long stop() {
if (! START_TIMES.containsKey(null)) {
return 0;
}
return printTimer("Anonymous", START_TIMES.remove(null), System.currentTimeMillis());
}
public static synchronized void start(String name) {
long now = System.currentTimeMillis();
if (START_TIMES.containsKey(name)) {
LOG.warn(name + " timer was started twice without being stopped; previous timer has run for " + (now - START_TIMES.get(name).longValue()) +"ms");
}
START_TIMES.put(name, now);
}
public static synchronized long stop(String name) {
if (! START_TIMES.containsKey(name)) {
return 0;
}
return printTimer(name, START_TIMES.remove(name), System.currentTimeMillis());
}
private static long printTimer(String name, long start, long end) {
LOG.info(name + " timer ran for " + (end - start) + "ms");
return end - start;
}
}
You need to link with the math library, libm:
$ gcc -Wall foo.c -o foo -lm
What the code does, is that the number 8000 is counting up from 0 to 8000. The problem is, that it is placed at the middle of quite long page, and once user scroll down and actually see the number, the animation is already dine. I would like to trigger the counter, once it appears in the viewport.
JS:
$('.count').each(function () {
$(this).prop('Counter',0).animate({
Counter: $(this).text()
}, {
duration: 4000,
easing: 'swing',
step: function (now) {
$(this).text(Math.ceil(now));
}
});
});
And HTML:
<span class="count">8000</span>
Don't get me wrong, but you can do this way ;)
function nagitive_check($value){
if (isset($value)){
if (substr(strval($value), 0, 1) == "-"){
return 'It is negative<br>';
} else {
return 'It is not negative!<br>';
}
}
}
Output:
echo nagitive_check(-100); // It is negative
echo nagitive_check(200); // It is not negative!
echo nagitive_check(200-300); // It is negative
echo nagitive_check(200-300+1000); // It is not negative!
As many have pointed out, emacspeak has been the enduring solution cross platform for many of the older hackers out there. Since it supports Linux and Mac out of the box, it has become my prefered means of developing Windows egnostic projects.
To the issue of actually getting down syntax through an auditory one as opposed to a visual one, I have found that there exists a variety of techniques to get one close if not on the same playing field.
Auditory icons can stand in place for verbal descriptors for one example. You can, put tones for how far a line is indented. The longer the tone, the further the indent. Since tones can play in parallel with text to speech, the information comes through in the same timeframe and doesn't serialize the communication of something so basic.
Braille can quickly and precisely decode to the user the exact syntax of a line. This is something more useful for people who use braille in daily life; the biggest advantage is random access to the contents of the display. Refreshable units typically have router keys above each character cell which can place the cursor to that cell. No fiddling with arrow keys O(n) op vs O(1) access.
Auditory dimensionality (pitch, rate, volume, inflection, richness, stress, etc) can convey a concept (keyword, class, variable, error, etc). For example, comments can be read in a monotone inflection...suiting, if I might say so :).
Emacs and other editors to lesser extents (Visual Studio) allow a coder to peruse a program symantically (next block, fold block, down defun, jump to def, walk up the parse tree, etc). You can very quickly get the "big" picture of the structure of an entire project doing this; with extensions like Cedet, you can get the goodness of VS/Eclipse/etc cross platform and in a textual editor.
Could probably go on and on, but that in a nutshell, is the basis of why a few of us are out there hacking away in industry, adacdemia, or in our basements :).
For me it's the Valid OAuth Redirect URIs in Facebook Login Settings. The 191 error is gone once I updated the correct redirect URI.
$rand = rand(1,4);
or, for arrays specifically:
$array = array('a value', 'another value', 'just some value', 'not some value');
$rand = $array[ rand(0, count($array)-1) ];
The execution plans are typically going to be identical in these cases, but until you see how the optimizer factors in all the other aspects of indexes etc., you really will never know.
It's also possible to use a regular expression to achieve this when you want to test for any whitespace character and not just a space.
var text = "sossjj ssskkk";
var regex = new Regex(@"\s");
regex.IsMatch(text); // true
value = value.setScale(2, RoundingMode.CEILING)
Try git rm -r --cached .idea
in your terminal. It disables the change tracking.
The package fBasics
has a function colStdevs
require('fBasics')
set.seed(123)
colStdevs(matrix(rnorm(1000, mean=10, sd=1), ncol=5))
[1] 0.9431599 0.9959210 0.9648052 1.0246366 1.0351268
To have a constant date format irrespective of the computer settings, you must use 3 different input elements to capture day, month, and year respectively. However, you need to validate the user input to ensure that you have a valid date as shown bellow
<input id="txtDay" type="text" placeholder="DD" />
<input id="txtMonth" type="text" placeholder="MM" />
<input id="txtYear" type="text" placeholder="YYYY" />
<button id="but" onclick="validateDate()">Validate</button>
function validateDate() {
var date = new Date(document.getElementById("txtYear").value, document.getElementById("txtMonth").value, document.getElementById("txtDay").value);
if (date == "Invalid Date") {
alert("jnvalid date");
}
}
I recommend: if your search is simple , you can use `
column*1 = column
` operator interesting :) is work and faster than on fields varchar/char
SELECT * FROM myTable WHERE column*1 = column;
ABC*1 => 0 (NOT EQU **ABC**)
AB15*A => 15 (NOT EQU **AB15**)
15AB => 15 (NOT EQU **15AB**)
15 => 15 (EQUALS TRUE **15**)
You want $_SERVER['REQUEST_URI']
. From the docs:
'REQUEST_URI'
The URI which was given in order to access this page; for instance,
'/index.html'
.
SqlConnection con = new SqlConnection(@"Data Source=NIKOLAY;Initial Catalog=PlanZadanie;Integrated Security=True");
SqlCommand cmd = new SqlCommand();
DataTable dt = new DataTable();
public void loadTree(TreeView tree)
{
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT [RAZDEL_ID],[NAME_RAZDEL] FROM [tbl_RAZDEL]";
try
{
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
tree.Nodes.Add(reader.GetString(1));
tree.Nodes[0].Nodes.Add("yourChildNode");
tree.ExpandAll();
}
con.Close();
}
catch (Exception ex)
{
MessageBox.Show("?????? ? ??????????: " + ex.Message);
}
}
Either !=
or ne
will work, but you need to get the accessor syntax and nested quotes sorted out.
<c:if test="${content.contentType.name ne 'MCE'}">
<%-- snip --%>
</c:if>
The following snippet simply hides the keyboard:
public static void hideSoftKeyboard(Activity activity) {
InputMethodManager inputMethodManager =
(InputMethodManager) activity.getSystemService(
Activity.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(
activity.getCurrentFocus().getWindowToken(), 0);
}
You can put this up in a utility class, or if you are defining it within an activity, avoid the activity parameter, or call hideSoftKeyboard(this)
.
The trickiest part is when to call it. You can write a method that iterates through every View
in your activity, and check if it is an instanceof EditText
if it is not register a setOnTouchListener
to that component and everything will fall in place. In case you are wondering how to do that, it is in fact quite simple. Here is what you do, you write a recursive method like the following, in fact you can use this to do anything, like setup custom typefaces etc... Here is the method
public void setupUI(View view) {
// Set up touch listener for non-text box views to hide keyboard.
if (!(view instanceof EditText)) {
view.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
hideSoftKeyboard(MyActivity.this);
return false;
}
});
}
//If a layout container, iterate over children and seed recursion.
if (view instanceof ViewGroup) {
for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
View innerView = ((ViewGroup) view).getChildAt(i);
setupUI(innerView);
}
}
}
That is all, just call this method after you setContentView
in your activity. In case you are wondering what parameter you would pass, it is the id
of the parent container. Assign an id
to your parent container like
<RelativeLayoutPanel android:id="@+id/parent"> ... </RelativeLayout>
and call setupUI(findViewById(R.id.parent))
, that is all.
If you want to use this effectively, you may create an extended Activity
and put this method in, and make all other activities in your application extend this activity and call its setupUI()
in the onCreate()
method.
Hope it helps.
If you use more than 1 activity define common id to parent layout like
<RelativeLayout android:id="@+id/main_parent"> ... </RelativeLayout>
Then extend a class from Activity
and define setupUI(findViewById(R.id.main_parent))
Within its OnResume()
and extend this class instead of ``Activityin your program
Here is a Kotlin version of the above function:
@file:JvmName("KeyboardUtils")
fun Activity.hideSoftKeyboard() {
currentFocus?.let {
val inputMethodManager = ContextCompat.getSystemService(this, InputMethodManager::class.java)!!
inputMethodManager.hideSoftInputFromWindow(it.windowToken, 0)
}
}
#include <iostream>
#include <sstream>
#include <vector>
using namespace std;
int main() {
string s1="split on whitespace";
istringstream iss(s1);
vector<string> result;
for(string s;iss>>s;)
result.push_back(s);
int n=result.size();
for(int i=0;i<n;i++)
cout<<result[i]<<endl;
return 0;
}
Output:-
split
on
whitespace
Pull "pulls" the div towards the left of the browser and and Push "pushes" the div away from left of browser.
Like:
So basically in a 3 column layout of any web page the "Main Body" appears at the "Center" and in "Mobile" view the "Main Body" appears at the "Top" of the page. This is mostly desired by everyone with 3 column layout.
<div class="container">
<div class="row">
<div id="content" class="col-lg-4 col-lg-push-4 col-sm-12">
<h2>This is Content</h2>
<p>orem Ipsum ...</p>
</div>
<div id="sidebar-left" class="col-lg-4 col-sm-6 col-lg-pull-4">
<h2>This is Left Sidebar</h2>
<p>orem Ipsum...</p>
</div>
<div id="sidebar-right" class="col-lg-4 col-sm-6">
<h2>This is Right Sidebar</h2>
<p>orem Ipsum.... </p>
</div>
</div>
</div>
You can view it here: http://jsfiddle.net/DrGeneral/BxaNN/1/
Hope it helps
Some "real world" examples for static variables:
building a class where you can reach hardcoded values for your application. Similar to an enumeration, but with more flexibility on the datatype.
public static class Enemies
{
public readonly static Guid Orc = new Guid("{937C145C-D432-4DE2-A08D-6AC6E7F2732C}");
}
The widely known singleton, this allows to control to have exactly one instance of a class. This is very useful if you want access to it in your whole application, but not pass it to every class just to allow this class to use it.
public sealed class TextureManager
{
private TextureManager() {}
public string LoadTexture(string aPath);
private static TextureManager sInstance = new TextureManager();
public static TextureManager Instance
{
get { return sInstance; }
}
}
and this is how you would call the texturemanager
TextureManager.Instance.LoadTexture("myImage.png");
About your last question: You are refering to compiler error CS0176. I tried to find more infor about that, but could only find what the msdn had to say about it:
A static method, field, property, or event is callable on a class even when no instance of the class has been created. If any instances of the class are created, they cannot be used to access the static member. Only one copy of static fields and events exists, and static methods and properties can only access static fields and static events.
Using Dict Comprehensions
final_dict = {key: t[key] for key in t if key not in [key1, key2]}
where key1 and key2 are to be removed.
In the example below, keys "b" and "c" are to be removed & it's kept in a keys list.
>>> a
{'a': 1, 'c': 3, 'b': 2, 'd': 4}
>>> keys = ["b", "c"]
>>> print {key: a[key] for key in a if key not in keys}
{'a': 1, 'd': 4}
>>>
Go to your Android SDK installed directory then extras > android > support > v7 > appcompat.
in my case : D:\Software\adt-bundle-windows-x86-20140702\sdk\extras\android\support\v7\appcompat
once you are in appcompat folder ,check for project.properties file then change the value from default 19 to 21 as :
target=android-21.
Save the file and then refresh your project.
Then clean the project: In project tab , select clean option then select your project and clean...
This will resolve the error. If not, make sure your project also targets API 21 or higher (same steps as before, and easily forgotten when upgrading a project which targets an older version). Enjoy coding...
If it is a reversible migration and the last one which has been executed, then run rake db:rollback
. And you can always use version.
e.g
the migration file is 20140716084539_create_customer_stats.rb,so the rollback command will be,
rake db:migrate:down VERSION=20140716084539
Check that your index is really datetime
, not str
Can be helpful:
data.index = pd.to_datetime(data['Index']).values
Car.js
class Car {
getName() {return 'car'};
}
export default Car;
TestFile.js
const object = require('./Car.js');
const instance = new object();
error: TypeError: instance is not a constructor
printing content of object
object = {default: Car}
append default to the require function and it will work as contructor
const object = require('object-fit-images').default;
const instance = new object();
instance.getName();
I had the same problem in my newly started project with minimum api 23, and finally i have added these lines of codes in my gradle dependency file and it solved the error:)
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:customtabs:28.0.0'
implementation 'com.android.support:support-vector-drawable:28.0.0'
implementation 'com.android.support:support-media-compat:28.0.0'
JsonPath jsonPathEvaluator = response.jsonPath();
return jsonPathEvaluator.get("user_id").toString();
Here's an alternative:
<svg ...>
<switch>
<g requiredFeatures="http://www.w3.org/Graphics/SVG/feature/1.2/#TextFlow">
<textArea width="200" height="auto">
Text goes here
</textArea>
</g>
<foreignObject width="200" height="200"
requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
<p xmlns="http://www.w3.org/1999/xhtml">Text goes here</p>
</foreignObject>
<text x="20" y="20">No automatic linewrapping.</text>
</switch>
</svg>
Noting that even though foreignObject may be reported as being supported with that featurestring, there's no guarantee that HTML can be displayed because that's not required by the SVG 1.1 specification. There is no featurestring for html-in-foreignobject support at the moment. However, it is still supported in many browsers, so it's likely to become required in the future, perhaps with a corresponding featurestring.
Note that the 'textArea' element in SVG Tiny 1.2 supports all the standard svg features, e.g advanced filling etc, and that you can specify either of width or height as auto, meaning that the text can flow freely in that direction. ForeignObject acts as clipping viewport.
Note: while the above example is valid SVG 1.1 content, in SVG 2 the 'requiredFeatures' attribute has been removed, which means the 'switch' element will try to render the first 'g' element regardless of having support for SVG 1.2 'textArea' elements. See SVG2 switch element spec.
Java 8:
int[] intArr = Arrays.stream(integerList).mapToInt(i->i).toArray();
In python a list knows its length, so you can just do len(sys.argv)
to get the number of elements in argv
.
Consider the signal()
function from the C standard:
extern void (*signal(int, void(*)(int)))(int);
Perfectly obscurely obvious - it's a function that takes two arguments, an integer and a pointer to a function that takes an integer as an argument and returns nothing, and it (signal()
) returns a pointer to a function that takes an integer as an argument and returns nothing.
If you write:
typedef void (*SignalHandler)(int signum);
then you can instead declare signal()
as:
extern SignalHandler signal(int signum, SignalHandler handler);
This means the same thing, but is usually regarded as somewhat easier to read. It is clearer that the function takes an int
and a SignalHandler
and returns a SignalHandler
.
It takes a bit of getting used to, though. The one thing you can't do, though is write a signal handler function using the SignalHandler
typedef
in the function definition.
I'm still of the old-school that prefers to invoke a function pointer as:
(*functionpointer)(arg1, arg2, ...);
Modern syntax uses just:
functionpointer(arg1, arg2, ...);
I can see why that works - I just prefer to know that I need to look for where the variable is initialized rather than for a function called functionpointer
.
Sam commented:
I have seen this explanation before. And then, as is the case now, I think what I didn't get was the connection between the two statements:
extern void (*signal(int, void()(int)))(int); /*and*/ typedef void (*SignalHandler)(int signum); extern SignalHandler signal(int signum, SignalHandler handler);
Or, what I want to ask is, what is the underlying concept that one can use to come up with the second version you have? What is the fundamental that connects "SignalHandler" and the first typedef? I think what needs to be explained here is what is typedef is actually doing here.
Let's try again. The first of these is lifted straight from the C standard - I retyped it, and checked that I had the parentheses right (not until I corrected it - it is a tough cookie to remember).
First of all, remember that typedef
introduces an alias for a type. So, the alias is SignalHandler
, and its type is:
a pointer to a function that takes an integer as an argument and returns nothing.
The 'returns nothing' part is spelled void
; the argument that is an integer is (I trust) self-explanatory. The following notation is simply (or not) how C spells pointer to function taking arguments as specified and returning the given type:
type (*function)(argtypes);
After creating the signal handler type, I can use it to declare variables and so on. For example:
static void alarm_catcher(int signum)
{
fprintf(stderr, "%s() called (%d)\n", __func__, signum);
}
static void signal_catcher(int signum)
{
fprintf(stderr, "%s() called (%d) - exiting\n", __func__, signum);
exit(1);
}
static struct Handlers
{
int signum;
SignalHandler handler;
} handler[] =
{
{ SIGALRM, alarm_catcher },
{ SIGINT, signal_catcher },
{ SIGQUIT, signal_catcher },
};
int main(void)
{
size_t num_handlers = sizeof(handler) / sizeof(handler[0]);
size_t i;
for (i = 0; i < num_handlers; i++)
{
SignalHandler old_handler = signal(handler[i].signum, SIG_IGN);
if (old_handler != SIG_IGN)
old_handler = signal(handler[i].signum, handler[i].handler);
assert(old_handler == SIG_IGN);
}
...continue with ordinary processing...
return(EXIT_SUCCESS);
}
Please note How to avoid using printf()
in a signal handler?
So, what have we done here - apart from omit 4 standard headers that would be needed to make the code compile cleanly?
The first two functions are functions that take a single integer and return nothing. One of them actually doesn't return at all thanks to the exit(1);
but the other does return after printing a message. Be aware that the C standard does not permit you to do very much inside a signal handler; POSIX is a bit more generous in what is allowed, but officially does not sanction calling fprintf()
. I also print out the signal number that was received. In the alarm_handler()
function, the value will always be SIGALRM
as that is the only signal that it is a handler for, but signal_handler()
might get SIGINT
or SIGQUIT
as the signal number because the same function is used for both.
Then I create an array of structures, where each element identifies a signal number and the handler to be installed for that signal. I've chosen to worry about 3 signals; I'd often worry about SIGHUP
, SIGPIPE
and SIGTERM
too and about whether they are defined (#ifdef
conditional compilation), but that just complicates things. I'd also probably use POSIX sigaction()
instead of signal()
, but that is another issue; let's stick with what we started with.
The main()
function iterates over the list of handlers to be installed. For each handler, it first calls signal()
to find out whether the process is currently ignoring the signal, and while doing so, installs SIG_IGN
as the handler, which ensures that the signal stays ignored. If the signal was not previously being ignored, it then calls signal()
again, this time to install the preferred signal handler. (The other value is presumably SIG_DFL
, the default signal handler for the signal.) Because the first call to 'signal()' set the handler to SIG_IGN
and signal()
returns the previous error handler, the value of old
after the if
statement must be SIG_IGN
- hence the assertion. (Well, it could be SIG_ERR
if something went dramatically wrong - but then I'd learn about that from the assert firing.)
The program then does its stuff and exits normally.
Note that the name of a function can be regarded as a pointer to a function of the appropriate type. When you do not apply the function-call parentheses - as in the initializers, for example - the function name becomes a function pointer. This is also why it is reasonable to invoke functions via the pointertofunction(arg1, arg2)
notation; when you see alarm_handler(1)
, you can consider that alarm_handler
is a pointer to the function and therefore alarm_handler(1)
is an invocation of a function via a function pointer.
So, thus far, I've shown that a SignalHandler
variable is relatively straight-forward to use, as long as you have some of the right type of value to assign to it - which is what the two signal handler functions provide.
Now we get back to the question - how do the two declarations for signal()
relate to each other.
Let's review the second declaration:
extern SignalHandler signal(int signum, SignalHandler handler);
If we changed the function name and the type like this:
extern double function(int num1, double num2);
you would have no problem interpreting this as a function that takes an int
and a double
as arguments and returns a double
value (would you? maybe you'd better not 'fess up if that is problematic - but maybe you should be cautious about asking questions as hard as this one if it is a problem).
Now, instead of being a double
, the signal()
function takes a SignalHandler
as its second argument, and it returns one as its result.
The mechanics by which that can also be treated as:
extern void (*signal(int signum, void(*handler)(int signum)))(int signum);
are tricky to explain - so I'll probably screw it up. This time I've given the parameters names - though the names aren't critical.
In general, in C, the declaration mechanism is such that if you write:
type var;
then when you write var
it represents a value of the given type
. For example:
int i; // i is an int
int *ip; // *ip is an int, so ip is a pointer to an integer
int abs(int val); // abs(-1) is an int, so abs is a (pointer to a)
// function returning an int and taking an int argument
In the standard, typedef
is treated as a storage class in the grammar, rather like static
and extern
are storage classes.
typedef void (*SignalHandler)(int signum);
means that when you see a variable of type SignalHandler
(say alarm_handler) invoked as:
(*alarm_handler)(-1);
the result has type void
- there is no result. And (*alarm_handler)(-1);
is an invocation of alarm_handler()
with argument -1
.
So, if we declared:
extern SignalHandler alt_signal(void);
it means that:
(*alt_signal)();
represents a void value. And therefore:
extern void (*alt_signal(void))(int signum);
is equivalent. Now, signal()
is more complex because it not only returns a SignalHandler
, it also accepts both an int and a SignalHandler
as arguments:
extern void (*signal(int signum, SignalHandler handler))(int signum);
extern void (*signal(int signum, void (*handler)(int signum)))(int signum);
If that still confuses you, I'm not sure how to help - it is still at some levels mysterious to me, but I've grown used to how it works and can therefore tell you that if you stick with it for another 25 years or so, it will become second nature to you (and maybe even a bit quicker if you are clever).
You could also use a core dump and then examine it with gdb. To get useful information you also need to compile with the -g
flag.
Whenever you get the message:
Segmentation fault (core dumped)
a core file is written into your current directory. And you can examine it with the command
gdb your_program core_file
The file contains the state of the memory when the program crashed. A core dump can be useful during the deployment of your software.
Make sure your system doesn't set the core dump file size to zero. You can set it to unlimited with:
ulimit -c unlimited
Careful though! that core dumps can become huge.
.gitignore
to match the file you want to ignoregit rm --cached /path/to/file
See also:
The current accepted answer doesn't work for multiple groupings.
Try this when you need to operate on categories of column row-values.
Suppose I have the following data:
+---------+-----------+
| column1 | column2 |
+---------+-----------+
| cat | Felon |
| cat | Purz |
| dog | Fido |
| dog | Beethoven |
| dog | Buddy |
| bird | Tweety |
+---------+-----------+
And I want this as my output:
+------+----------------------+
| type | names |
+------+----------------------+
| cat | Felon,Purz |
| dog | Fido,Beethoven,Buddy |
| bird | Tweety |
+------+----------------------+
(If you're following along:
create table #column_to_list (column1 varchar(30), column2 varchar(30))
insert into #column_to_list
values
('cat','Felon'),
('cat','Purz'),
('dog','Fido'),
('dog','Beethoven'),
('dog','Buddy'),
('bird','Tweety')
)
Now – I don’t want to go into all the syntax, but as you can see, this does the initial trick for us:
select ',' + cast(column2 as varchar(255)) as [text()]
from #column_to_list sub
where column1 = 'dog'
for xml path('')
--Using "as [text()]" here is specific to the “for XML” line after our where clause and we can’t give a name to our selection, hence the weird column_name
output:
+------------------------------------------+
| XML_F52E2B61-18A1-11d1-B105-00805F49916B |
+------------------------------------------+
| ,Fido,Beethoven,Buddy |
+------------------------------------------+
You can see it’s limited in that it was for just one grouping (where column1 = ‘dog’) and it left a comma in the front, and additionally it’s named weird.
So, first let's handle the leading comma using the 'stuff' function and name our column stuff_list:
select stuff([list],1,1,'') as stuff_list
from (select ',' + cast(column2 as varchar(255)) as [text()]
from #column_to_list sub
where column1 = 'dog'
for xml path('')
) sub_query([list])
--"sub_query([list])" just names our column as '[list]' so we can refer to it in the stuff function.
Output:
+----------------------+
| stuff_list |
+----------------------+
| Fido,Beethoven,Buddy |
+----------------------+
Finally let’s just mush this into a select statement, noting the reference to the top_query alias defining which column1 we want (on the 5th line here):
select top_query.column1,
(select stuff([list],1,1,'') as stuff_list
from (select ',' + cast(column2 as varchar(255)) as [text()]
from #column_to_list sub
where sub.column1 = top_query.column1
for xml path('')
) sub_query([list])
) as pet_list
from #column_to_list top_query
group by column1
order by column1
output:
+---------+----------------------+
| column1 | pet_list |
+---------+----------------------+
| bird | Tweety |
| cat | Felon,Purz |
| dog | Fido,Beethoven,Buddy |
+---------+----------------------+
And we’re done.
You can read more here:
So the answer to the original question, can you join scopes with 'or' instead of 'and' seems to be "no you can't". But you can hand code a completely different scope or query that does the job, or use a different framework from ActiveRecord e.g. MetaWhere or Squeel. Not useful in my case
I'm 'or'ing a scope generated by pg_search, which does a bit more than select, it includes order by ASC, which makes a mess of a clean union. I want to 'or' it with a handcrafted scope that does stuff I can't do in pg_search. So I've had to do it like this.
Product.find_by_sql("(#{Product.code_starts_with('Tom').to_sql}) union (#{Product.name_starts_with('Tom').to_sql})")
I.e. turn the scopes into sql, put brackets around each one, union them together and then find_by_sql using the sql generated. It's a bit rubbish, but it does work.
No, don't tell me I can use "against: [:name,:code]" in pg_search, I'd like to do it like that, but the 'name' field is an hstore, which pg_search can't handle yet. So the scope by name has to be hand crafted and then unioned with the pg_search scope.
You need to get ObjectNode
type object in order to set values.
Take a look at this
You could use python-benedict
, it's a dict subclass.
Installation: pip install python-benedict
from benedict import benedict
dict_you_want = benedict(your_dict).subset(keys=['firstname', 'lastname', 'email'])
It's open-source on GitHub: https://github.com/fabiocaccamo/python-benedict
Disclaimer: I'm the author of this library.
There are two options:
This is the suggested option. It ensures your fonts go through the build pipeline, get hashes during compilation so that browser caching works correctly, and that you get compilation errors if the files are missing.
As described in “Adding Images, Fonts, and Files”, you need to have a CSS file imported from JS. For example, by default src/index.js
imports src/index.css
:
import './index.css';
A CSS file like this goes through the build pipeline, and can reference fonts and images. For example, if you put a font in src/fonts/MyFont.woff
, your index.css
might include this:
@font-face {
font-family: 'MyFont';
src: local('MyFont'), url(./fonts/MyFont.woff) format('woff');
}
Notice how we’re using a relative path starting with ./
. This is a special notation that helps the build pipeline (powered by Webpack) discover this file.
Normally this should be enough.
public
FolderIf for some reason you prefer not to use the build pipeline, and instead do it the “classic way”, you can use the public
folder and put your fonts there.
The downside of this approach is that the files don’t get hashes when you compile for production so you’ll have to update their names every time you change them, or browsers will cache the old versions.
If you want to do it this way, put the fonts somewhere into the public
folder, for example, into public/fonts/MyFont.woff
. If you follow this approach, you should put CSS files into public
folder as well and not import them from JS because mixing these approaches is going to be very confusing. So, if you still want to do it, you’d have a file like public/index.css
. You would have to manually add <link>
to this stylesheet from public/index.html
:
<link rel="stylesheet" href="%PUBLIC_URL%/index.css">
And inside of it, you would use the regular CSS notation:
@font-face {
font-family: 'MyFont';
src: local('MyFont'), url(fonts/MyFont.woff) format('woff');
}
Notice how I’m using fonts/MyFont.woff
as the path. This is because index.css
is in the public
folder so it will be served from the public path (usually it’s the server root, but if you deploy to GitHub Pages and set your homepage
field to http://myuser.github.io/myproject
, it will be served from /myproject
). However fonts
are also in the public
folder, so they will be served from fonts
relatively (either http://mywebsite.com/fonts
or http://myuser.github.io/myproject/fonts
). Therefore we use the relative path.
Note that since we’re avoiding the build pipeline in this example, it doesn’t verify that the file actually exists. This is why I don’t recommend this approach. Another problem is that our index.css
file doesn’t get minified and doesn’t get a hash. So it’s going to be slower for the end users, and you risk the browsers caching old versions of the file.
Go with the first method (“Using Imports”). I only described the second one since that’s what you attempted to do (judging by your comment), but it has many problems and should only be the last resort when you’re working around some issue.
ALTER TABLE `group` RENAME `member`
group is keyword so you must have to enclose into group
//sample01_x000D_
(function(_){_[0]()})([_x000D_
function(){$('#art1').animate({'width':'10px'},100,this[1].bind(this))},_x000D_
function(){$('#art2').animate({'width':'10px'},100,this[2].bind(this))},_x000D_
function(){$('#art3').animate({'width':'10px'},100)},_x000D_
])_x000D_
_x000D_
//sample02_x000D_
(function(_){_.next=function(){_[++_.i].apply(_,arguments)},_[_.i=0]()})([_x000D_
function(){$('#art1').animate({'width':'10px'},100,this.next)},_x000D_
function(){$('#art2').animate({'width':'10px'},100,this.next)},_x000D_
function(){$('#art3').animate({'width':'10px'},100)},_x000D_
]);_x000D_
_x000D_
//sample03_x000D_
(function(_){_.next=function(){return _[++_.i].bind(_)},_[_.i=0]()})([_x000D_
function(){$('#art1').animate({'width':'10px'},100,this.next())},_x000D_
function(){$('#art2').animate({'width':'10px'},100,this.next())},_x000D_
function(){$('#art3').animate({'width':'10px'},100)},_x000D_
]);
_x000D_
--- I know this answer is not for this question, but I want people who reads this question and want to handle Services such as Factories to avoid trouble doing this ----
For this you will need to use a Service or a Factory.
The services are the BEST PRACTICE to share data between not nested controllers.
A very very good annotation on this topic about data sharing is how to declare objects. I was unlucky because I fell in a AngularJS trap before I read about it, and I was very frustrated. So let me help you avoid this trouble.
I read from the "ng-book: The complete book on AngularJS" that AngularJS ng-models that are created in controllers as bare-data are WRONG!
A $scope element should be created like this:
angular.module('myApp', [])
.controller('SomeCtrl', function($scope) {
// best practice, always use a model
$scope.someModel = {
someValue: 'hello computer'
});
And not like this:
angular.module('myApp', [])
.controller('SomeCtrl', function($scope) {
// anti-pattern, bare value
$scope.someBareValue = 'hello computer';
};
});
This is because it is recomended(BEST PRACTICE) for the DOM(html document) to contain the calls as
<div ng-model="someModel.someValue"></div> //NOTICE THE DOT.
This is very helpful for nested controllers if you want your child controller to be able to change an object from the parent controller....
But in your case you don't want nested scopes, but there is a similar aspect to get objects from services to the controllers.
Lets say you have your service 'Factory' and in the return space there is an objectA that contains objectB that contains objectC.
If from your controller you want to GET the objectC into your scope, is a mistake to say:
$scope.neededObjectInController = Factory.objectA.objectB.objectC;
That wont work... Instead use only one dot.
$scope.neededObjectInController = Factory.ObjectA;
Then, in the DOM you can call objectC from objectA. This is a best practice related to factories, and most important, it will help to avoid unexpected and non-catchable errors.
you can use Package Manager to add it as package and it is the easiest way to do. You don't need anything else to work with mysql database.
Or you can run below command in Package Manager Console
PM> Install-Package MySql.Data
Your "listen" directives are wrong. See this page: http://nginx.org/en/docs/http/server_names.html.
They should be
server {
listen 80;
server_name www.domain1.com;
root /var/www/domain1;
}
server {
listen 80;
server_name www.domain2.com;
root /var/www/domain2;
}
Note, I have only included the relevant lines. Everything else looked okay but I just deleted it for clarity. To test it you might want to try serving a text file from each server first before actually serving php. That's why I left the 'root' directive in there.
A cleaner (but less verbose, and perhaps not as preferred) alternative to user454322's answer on Java 6 (i.e., Android) would be to catch all Exception
s and re-throw RuntimeException
s. This wouldn't work if you're planning on catching other types of exceptions further up the stack (unless you also re-throw them), but will effectively catch all checked exceptions.
For instance:
try {
// CODE THAT THROWS EXCEPTION
} catch (Exception e) {
if (e instanceof RuntimeException) {
// this exception was not expected, so re-throw it
throw e;
} else {
// YOUR CODE FOR ALL CHECKED EXCEPTIONS
}
}
That being said, for verbosity, it might be best to set a boolean or some other variable and based on that execute some code after the try-catch block.
Use the method "toArray()"
ArrayList<String> mStringList= new ArrayList<String>();
mStringList.add("ann");
mStringList.add("john");
Object[] mStringArray = mStringList.toArray();
for(int i = 0; i < mStringArray.length ; i++){
Log.d("string is",(String)mStringArray[i]);
}
or you can do it like this: (mentioned in other answers)
ArrayList<String> mStringList= new ArrayList<String>();
mStringList.add("ann");
mStringList.add("john");
String[] mStringArray = new String[mStringList.size()];
mStringArray = mStringList.toArray(mStringArray);
for(int i = 0; i < mStringArray.length ; i++){
Log.d("string is",(String)mStringArray[i]);
}
http://developer.android.com/reference/java/util/ArrayList.html#toArray()
JSON
An alternative Solution could be converting your list in the JSON format and print the Json-String. The advantage is a well formatted and readable Object-String without a need of implementing the toString()
. Additionaly it works for any other Object
or Collection
on the fly.
Example using Google's Gson:
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
...
public static void printJsonString(Object o) {
GsonBuilder gsonBuilder = new GsonBuilder();
/*
* Some options for GsonBuilder like setting dateformat or pretty printing
*/
Gson gson = gsonBuilder.create();
String json= gson.toJson(o);
System.out.println(json);
}
My answer, perhaps listed already but i did not notice, was simple: I deleted the app in question from the target itself, then fired up Xcode and the target was then available. And yes, i tried most of the other suggestions, and was resorting to activating the target from the Product menu, but that was getting tedious.
Suppose you want to set a pop-up text box for clicking a button lets say bt whose id is button, then code using Toast will somewhat look like this:
Button bt;
bt = (Button) findViewById(R.id.button);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"The text you want to display",Toast.LENGTH_LONG)
}
Go to installed updates and just uninstall Internet Explorer 11 Windows update. It works for me.
You can do it this way:
.container{
position: relative;
width: 100px;
height: 100px;
overflow: hidden;
z-index: 1;
}
img{
left: 50%;
position: absolute;
top: 50%;
-ms-transform: translate(-50%, -50%);
-webkit-transform: translate(-50%, -50%);
-moz-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
max-width: 100%;
}
I fixed this by deleting the locked branch file. It may seem crude, and I have no idea why it worked, but it fixed my issue (i.e. the same error you are getting)
Deleted:
.git/refs/remotes/origin/[locked branch name]
Then I simply ran
git fetch
and the git file restored itself, fully repaired
I use a small set of documentation patterns:
Another way is to use a website thumbnail/link preview service LinkPeek (even happens to show a screenshot of StackOverflow as a demo right now), URL2PNG, Browshot, Websnapr, or an alternative.
You have to initialise the object (create the object itself) in order to be able to call its methods otherwise you would get a NullPointerException
.
WordList words = new WordList();
try this,it may help you
import java.util.Scanner;
public class MulTwoArray {
public static void main(String[] args) {
int i, j, k;
int[][] a = new int[3][3];
int[][] b = new int[3][3];
int[][] c = new int[3][3];
Scanner sc = new Scanner(System.in);
System.out.println("Enter size of array a");
int rowa = sc.nextInt();
int cola = sc.nextInt();
System.out.println("Enter size of array b");
int rowb = sc.nextInt();
int colb = sc.nextInt();
//read and b
System.out.println("Enter elements of array a");
for (i = 0; i < rowa; ++i) {
for (j = 0; j < cola; ++j) {
a[i][j] = sc.nextInt();
}
System.out.println();
}
System.out.println("Enter elements of array b");
for (i = 0; i < rowb; ++i) {
for (j = 0; j < colb; ++j) {
b[i][j] = sc.nextInt();
}
System.out.println("\n");
}
//print a and b
System.out.println("the elements of array a");
for (i = 0; i < rowa; ++i) {
for (j = 0; j < cola; ++j) {
System.out.print(a[i][j]);
System.out.print("\t");
}
System.out.println("\n");
}
System.out.println("the elements of array b");
for (i = 0; i < rowb; ++i) {
for (j = 0; j < colb; ++j) {
System.out.print(b[i][j]);
System.out.print("\t");
}
System.out.println("\n");
}
//multiply a and b
for (i = 0; i < rowa; ++i) {
for (j = 0; j < colb; ++j) {
c[i][j] = 0;
for (k = 0; k < cola; ++k) {
c[i][j] += a[i][k] * b[k][j];
}
}
}
//print multi result
System.out.println("result of multiplication of array a and b is ");
for (i = 0; i < rowa; ++i) {
for (j = 0; j < colb; ++j) {
System.out.print(c[i][j]);
System.out.print("\t");
}
System.out.println("\n");
}
}
}
Do you mean that for a select element with an id of "next" you need to perform some specific script?
$("#next").change(function(){
//enter code here
});
Put the table in the second image on Sheet2, columns D to F.
In Sheet1, cell D2 use the formula
=iferror(vlookup($A2,Sheet2!$D$1:$F$100,column(A1),false),"")
copy across and down.
Edit: here is a picture. The data is in two sheets. On Sheet1, enter the formula into cell D2. Then copy the formula across to F2 and then down as many rows as you need.
Inline media queries are possible by using something like Breakpoint for Sass
This blog post does a good job explaining how inline media queries are more manageable than separate blocks: There Is No Breakpoint
Related to inline media queries is the idea of "element queries", a few interesting reads are:
I created a global define with more information:
#include <iostream>
#include <ctime>
#include <iomanip>
#define __FILENAME__ (__builtin_strrchr(__FILE__, '/') ? __builtin_strrchr(__FILE__, '/') + 1 : __FILE__) // only show filename and not it's path (less clutter)
#define INFO std::cout << std::put_time(std::localtime(&time_now), "%y-%m-%d %OH:%OM:%OS") << " [INFO] " << __FILENAME__ << "(" << __FUNCTION__ << ":" << __LINE__ << ") >> "
#define ERROR std::cout << std::put_time(std::localtime(&time_now), "%y-%m-%d %OH:%OM:%OS") << " [ERROR] " << __FILENAME__ << "(" << __FUNCTION__ << ":" << __LINE__ << ") >> "
static std::time_t time_now = std::time(nullptr);
Use it like this:
INFO << "Hello world" << std::endl;
ERROR << "Goodbye world" << std::endl;
Sample output:
16-06-23 21:33:19 [INFO] main.cpp(main:6) >> Hello world
16-06-23 21:33:19 [ERROR] main.cpp(main:7) >> Goodbye world
Put these lines in your header file. I find this very useful for debugging, etc.
This is implemented in Nexus since Version 3.9.0.
For example, I will create a table called users
as below and give a column named date
a default value NOW()
create table users_parent (
user_id varchar(50),
full_name varchar(240),
login_id_1 varchar(50),
date timestamp NOT NULL DEFAULT NOW()
);
Thanks
I had the same problem for Winforms.
The solution for me is:
Install-Package Microsoft.ReportViewer.Runtime.Winforms
For problems where it seems to be an error on a line you think is correct, you can often remove/comment the line where the error appears to be and, if the error moves to the next line, there are two possibilities.
Either both lines have a problem or the previous line has a problem which is being carried forward. The most likely case is the second option (even more so if you remove another line and it moves again).
For example, the following Python program twisty_passages.py
:
xyzzy = (1 +
plugh = 7
generates the error:
File "twisty_passages.py", line 2
plugh = 7
^
SyntaxError: invalid syntax
despite the problem clearly being on line 1.
In your particular case, that is the problem. The parentheses in the line before your error line is unmatched, as per the following snippet:
# open parentheses: 1 2 3
# v v v
fi2=0.460*scipy.sqrt(1-(Tr-0.566)**2/(0.434**2)+0.494
# ^ ^
# close parentheses: 1 2
Depending on what you're trying to achieve, the solution may be as simple as just adding another closing parenthesis at the end, to close off the sqrt
function.
I can't say for certain since I don't recognise the expression off the top of my head. Hardly surprising if (assuming PSAT is the enzyme, and the use of the typeMolecule
identifier) it's to do with molecular biology - I seem to recall failing Biology consistently in my youth :-)
If you just need to resync
windows time, open an elevated command prompt and type:
w32tm /resync
C:\WINDOWS\system32>w32tm /resync
Sending resync command to local computer
The command completed successfully.
The following are the ways to pass a arguments/parameters to function in C++.
1. by value.
// passing parameters by value . . .
void foo(int x)
{
x = 6;
}
2. by reference.
// passing parameters by reference . . .
void foo(const int &x) // x is a const reference
{
x = 6;
}
// passing parameters by const reference . . .
void foo(const int &x) // x is a const reference
{
x = 6; // compile error: a const reference cannot have its value changed!
}
3. by object.
class abc
{
display()
{
cout<<"Class abc";
}
}
// pass object by value
void show(abc S)
{
cout<<S.display();
}
// pass object by reference
void show(abc& S)
{
cout<<S.display();
}
pd.date_range('2019-01-01', '2019-02-01').shape[0]
A different way to return an empty array is to use a constant as all empty arrays of a given type are the same.
private static final File[] NO_FILES = {};
private static File[] bar(){
return NO_FILES;
}
This worked for me on Mac
sudo chown -R $(whoami) $(brew --prefix)/*
I had this issue on VS2008: I removed the .suo; .ncb; and user project file, then restarted the solution and it fixed the problem for me.
You can simply use:
List<string> items = new List<string>() { "foo", "boo", "john", "doe" };
Console.WriteLine(string.Join(",", items));
Happy coding!
We can use replace
to change the values in 'mpg' to NA
that corresponds to cyl==4
.
mtcars %>%
mutate(mpg=replace(mpg, cyl==4, NA)) %>%
as.data.frame()
Source: Selenium WebDriver windows switching issue in Internet Explorer 8-10
For my case, IE began detecting new window handles after the registry edit.
Tab Process Growth : Sets the rate at which IE creates New Tab processes.
The "Max-Number" algorithm: This specifies the maximum number of tab processes that may be executed for a single isolation session for a single frame process at a specific mandatory integrity level (MIC). Relative values are:
- TabProcGrowth=0 : tabs and frames run within the same process; frames are not unified across MIC levels.
- TabProcGrowth =1: all tabs for a given frame process run in a single tab process for a given MIC level.
Source: Opening a New Tab may launch a New Process with Internet Explorer 8.0
Browser: IE11 x64 (Zoom: 100%)
OS: Windows 7 x64
Selenium: 3.5.1
WebDriver: IEDriverServer x64 3.5.1
public static String openWindow(WebDriver driver, By by) throws IOException {
String parentHandle = driver.getWindowHandle(); // Save parent window
WebElement clickableElement = driver.findElement(by);
clickableElement.click(); // Open child window
WebDriverWait wait = new WebDriverWait(driver, 10); // Timeout in 10s
boolean isChildWindowOpen = wait.until(ExpectedConditions.numberOfWindowsToBe(2));
if (isChildWindowOpen) {
Set<String> handles = driver.getWindowHandles();
// Switch to child window
for (String handle : handles) {
driver.switchTo().window(handle);
if (!parentHandle.equals(handle)) {
break;
}
}
driver.manage().window().maximize();
}
return parentHandle; // Returns parent window if need to switch back
}
/* How to use method */
String parentHandle = Selenium.openWindow(driver, by);
// Do things in child window
driver.close();
// Return to parent window
driver.switchTo().window(parentHandle);
The above code includes an if-check to make sure you are not switching to the parent window as Set<T>
has no guaranteed ordering in Java. WebDriverWait
appears to increase the chance of success as supported by below statement.
The browser may take time to acknowledge the new window, and you may be falling into your switchTo() loop before the popup window appears.
You automatically assume that the last window returned by getWindowHandles() will be the last one opened. That's not necessarily true, as they are not guaranteed to be returned in any order.
Source: Unable to handle a popup in IE,control is not transferring to popup window
BindingSource
is the only way without going for a 3rd party ORM, it may seem long winded at first but the benefits of one update method on the BindingSource
are so helpful.
If your source is say for example a list of user strings
List<string> users = GetUsers();
BindingSource source = new BindingSource();
source.DataSource = users;
dataGridView1.DataSource = source;
then when your done editing just update your data object whether that be a DataTable
or List of user strings like here and ResetBindings
on the BindingSource
;
users = GetUsers(); //Update your data object
source.ResetBindings(false);
These examples cover the three types of shifts applied to both a positive and a negative number:
// Signed left shift on 626348975
00100101010101010101001110101111 is 626348975
01001010101010101010011101011110 is 1252697950 after << 1
10010101010101010100111010111100 is -1789571396 after << 2
00101010101010101001110101111000 is 715824504 after << 3
// Signed left shift on -552270512
11011111000101010000010101010000 is -552270512
10111110001010100000101010100000 is -1104541024 after << 1
01111100010101000001010101000000 is 2085885248 after << 2
11111000101010000010101010000000 is -123196800 after << 3
// Signed right shift on 626348975
00100101010101010101001110101111 is 626348975
00010010101010101010100111010111 is 313174487 after >> 1
00001001010101010101010011101011 is 156587243 after >> 2
00000100101010101010101001110101 is 78293621 after >> 3
// Signed right shift on -552270512
11011111000101010000010101010000 is -552270512
11101111100010101000001010101000 is -276135256 after >> 1
11110111110001010100000101010100 is -138067628 after >> 2
11111011111000101010000010101010 is -69033814 after >> 3
// Unsigned right shift on 626348975
00100101010101010101001110101111 is 626348975
00010010101010101010100111010111 is 313174487 after >>> 1
00001001010101010101010011101011 is 156587243 after >>> 2
00000100101010101010101001110101 is 78293621 after >>> 3
// Unsigned right shift on -552270512
11011111000101010000010101010000 is -552270512
01101111100010101000001010101000 is 1871348392 after >>> 1
00110111110001010100000101010100 is 935674196 after >>> 2
00011011111000101010000010101010 is 467837098 after >>> 3
Ok, the question seems to have been answered fairly well, the UNICODE overload should take a wide character array as its second parameter. So if the command line parameter is "Hello"
that would probably end up as "H\0e\0l\0l\0o\0\0\0"
and your program would only print the 'H'
before it sees what it thinks is a null terminator.
So now you may wonder why it even compiles and links.
Well it compiles because you are allowed to define an overload to a function.
Linking is a slightly more complex issue. In C, there is no decorated symbol information so it just finds a function called main. The argc and argv are probably always there as call-stack parameters just in case even if your function is defined with that signature, even if your function happens to ignore them.
Even though C++ does have decorated symbols, it almost certainly uses C-linkage for main, rather than a clever linker that looks for each one in turn. So it found your wmain and put the parameters onto the call-stack in case it is the int wmain(int, wchar_t*[])
version.
Another approach using the new Swift 2 syntax is to use guard and nest it all in one conditional.
guard let touch = object.AnyObject() as? UITouch, let picker = touch.view as? UIPickerView else {
return //Do Nothing
}
//Do something with picker
In my opinion, the most elegant and idiomatic way of prepending an element or list to another list, in Python, is using the expansion operator * (also called unpacking operator),
# Initial list
l = [4, 5, 6]
# Modification
l = [1, 2, 3, *l]
Where the resulting list after the modification is [1, 2, 3, 4, 5, 6]
I also like simply combining two lists with the operator +, as shown,
# Prepends [1, 2, 3] to l
l = [1, 2, 3] + l
# Prepends element 42 to l
l = [42] + l
I don't like the other common approach, l.insert(0, value)
, as it requires a magic number. Moreover, insert()
only allows prepending a single element, however the approach above has the same syntax for prepending a single element or multiple elements.
for bootstrap 3 use like
$('#myModal').on('hidden.bs.modal', function () {
// do something…
})
I normally just run git mergetool
and it will prompt me if I want to keep the modified file or keep it deleted. This is the quickest way IMHO since it's one command instead of several per file.
If you have a bunch of deleted files in a specific subdirectory and you want all of them to be resolved by deleting the files, you can do this:
yes d | git mergetool -- the/subdirectory
The d
is provided to choose deleting each file. You can also use m
to keep the modified file. Taken from the prompt you see when you run mergetool
:
Use (m)odified or (d)eleted file, or (a)bort?
If you don't want to bother with weird expansions from bash you can do this
me$ FOO="BAR \x2A BAR" # 2A is hex code for *
me$ echo -e $FOO
BAR * BAR
me$
Explanation here why using -e option of echo makes life easier:
Relevant quote from man here:
SYNOPSIS
echo [SHORT-OPTION]... [STRING]...
echo LONG-OPTION
DESCRIPTION
Echo the STRING(s) to standard output.
-n do not output the trailing newline
-e enable interpretation of backslash escapes
-E disable interpretation of backslash escapes (default)
--help display this help and exit
--version
output version information and exit
If -e is in effect, the following sequences are recognized:
\\ backslash
...
\0NNN byte with octal value NNN (1 to 3 digits)
\xHH byte with hexadecimal value HH (1 to 2 digits)
For the hex code you can check man ascii page (first line in octal, second decimal, third hex):
051 41 29 ) 151 105 69 i
052 42 2A * 152 106 6A j
053 43 2B + 153 107 6B k
I also had this problem recently, and it was the SELinux which caused it. I was trying to have the post-commit of subversion to notify Jenkins that the code has change so Jenkins would do a build and deploy to Nexus.
I had to do the following to get it to work.
1) First I checked if SELinux is enabled:
less /selinux/enforce
This will output 1 (for on) or 0 (for off)
2) Temporary disable SELinux:
echo 0 > /selinux/enforce
Now test see if it works now.
3) Enable SELinux:
echo 1 > /selinux/enforce
Change the policy for SELinux.
4) First view the current configuration:
/usr/sbin/getsebool -a | grep httpd
This will give you: httpd_can_network_connect --> off
5) Set this to on and your post-commit will work with SELinux:
/usr/sbin/setsebool -P httpd_can_network_connect on
Now it should be working again.
The answer of @jfmercer must be modified slightly to work with current brew, because the output of brew missing
has changed:
brew deps [FORMULA] | xargs brew remove --ignore-dependencies && brew missing | cut -f1 -d: | xargs brew install
Use replace with Environment.NewLine
myString = myString.Replace(System.Environment.NewLine, "replacement text"); //add a line terminating ;
As mentioned in other posts, if the string comes from another environment (OS) then you'd need to replace that particular environments implementation of new line control characters.
Take a look at some of the crazy parsing examples in .Net's IPAddress.Parse: (MSDN)
"65536" ==> 0.0.255.255
"20.2" ==> 20.0.0.2
"20.65535" ==> 20.0.255.255
"128.1.2" ==> 128.1.0.2
You can use:
for (int x = 0; x < 10; x++) {
if (x == 5) { // If x is 5, then break it.
break;
}
}
You can map next and previous to function keys too, making cycling through buffers a breeze
map <F2> :bprevious<CR>
map <F3> :bnext<CR>
from my vimrc
If you don't need to initiate a post back when you press this button, then making the overhead of a server control isn't necesary.
<input id="addButton" type="button" value="Add" />
<script type="text/javascript" language="javascript">
$(document).ready(function()
{
$('#addButton').click(function()
{
showDialog('#addPerson');
});
});
</script>
If you still need to be able to do a post back, you can conditionally stop the rest of the button actions with a little different code:
<asp:Button ID="buttonAdd" runat="server" Text="Add" />
<script type="text/javascript" language="javascript">
$(document).ready(function()
{
$('#<%= buttonAdd.ClientID %>').click(function(e)
{
showDialog('#addPerson');
if(/*Some Condition Is Not Met*/)
return false;
});
});
</script>
May be useful for someone.. In Run as if you are getting only java application (No spring bootapp).. then probably you need to install "Spring Tools (aka Spring IDE and Spring Tool Suite)" through Eclipse market place. After successful installation and restart of Eclipse.. now you can see in Run as "Spring Boot app".
String.Format
adds many options in addition to the concatenation operators, including the ability to specify the specific format of each item added into the string.
For details on what is possible, I'd recommend reading the section on MSDN titled Composite Formatting. It explains the advantage of String.Format
(as well as xxx.WriteLine
and other methods that support composite formatting) over normal concatenation operators.
Maybe your ssh-agent is not enable You can try it
Install it
Enable ssh-agent
C:\Program Files\Git\cmd
start-ssh-agent
If you're in a method bound to an event, simply return false:
@Component({
(...)
template: `
<a href="/test.html" (click)="doSomething()">Test</a>
`
})
export class MyComp {
doSomething() {
(...)
return false;
}
}
Hopefully this helps someone else.
In the case when there is a error that something is not json serializable the answers above will not work. If you only want to save it so that is human readable then you need to recursively call string on all the non dictionary elements of your dictionary. If you want to load it later then save it as a pickle file then load it (e.g. torch.save(obj, f)
works fine).
This is what worked for me:
#%%
def _to_json_dict_with_strings(dictionary):
"""
Convert dict to dict with leafs only being strings. So it recursively makes keys to strings
if they are not dictionaries.
Use case:
- saving dictionary of tensors (convert the tensors to strins!)
- saving arguments from script (e.g. argparse) for it to be pretty
e.g.
"""
if type(dictionary) != dict:
return str(dictionary)
d = {k: _to_json_dict_with_strings(v) for k, v in dictionary.items()}
return d
def to_json(dic):
import types
import argparse
if type(dic) is dict:
dic = dict(dic)
else:
dic = dic.__dict__
return _to_json_dict_with_strings(dic)
def save_to_json_pretty(dic, path, mode='w', indent=4, sort_keys=True):
import json
with open(path, mode) as f:
json.dump(to_json(dic), f, indent=indent, sort_keys=sort_keys)
def my_pprint(dic):
"""
@param dic:
@return:
Note: this is not the same as pprint.
"""
import json
# make all keys strings recursively with their naitve str function
dic = to_json(dic)
# pretty print
pretty_dic = json.dumps(dic, indent=4, sort_keys=True)
print(pretty_dic)
# print(json.dumps(dic, indent=4, sort_keys=True))
# return pretty_dic
import torch
# import json # results in non serializabe errors for torch.Tensors
from pprint import pprint
dic = {'x': torch.randn(1, 3), 'rec': {'y': torch.randn(1, 3)}}
my_pprint(dic)
pprint(dic)
output:
{
"rec": {
"y": "tensor([[-0.3137, 0.3138, 1.2894]])"
},
"x": "tensor([[-1.5909, 0.0516, -1.5445]])"
}
{'rec': {'y': tensor([[-0.3137, 0.3138, 1.2894]])},
'x': tensor([[-1.5909, 0.0516, -1.5445]])}
I don't know why returning the string then printing it doesn't work but it seems you have to put the dumps directly in the print statement. Note pprint
as it has been suggested already works too. Note not all objects can be converted to a dict with dict(dic)
which is why some of my code has checks on this condition.
Context:
I wanted to save pytorch strings but I kept getting the error:
TypeError: tensor is not JSON serializable
so I coded the above. Note that yes, in pytorch you use torch.save
but pickle files aren't readable. Check this related post: https://discuss.pytorch.org/t/typeerror-tensor-is-not-json-serializable/36065/3
PPrint also has indent arguments but I didn't like how it looks:
pprint(stats, indent=4, sort_dicts=True)
output:
{ 'cca': { 'all': {'avg': tensor(0.5132), 'std': tensor(0.1532)},
'avg': tensor([0.5993, 0.5571, 0.4910, 0.4053]),
'rep': {'avg': tensor(0.5491), 'std': tensor(0.0743)},
'std': tensor([0.0316, 0.0368, 0.0910, 0.2490])},
'cka': { 'all': {'avg': tensor(0.7885), 'std': tensor(0.3449)},
'avg': tensor([1.0000, 0.9840, 0.9442, 0.2260]),
'rep': {'avg': tensor(0.9761), 'std': tensor(0.0468)},
'std': tensor([5.9043e-07, 2.9688e-02, 6.3634e-02, 2.1686e-01])},
'cosine': { 'all': {'avg': tensor(0.5931), 'std': tensor(0.7158)},
'avg': tensor([ 0.9825, 0.9001, 0.7909, -0.3012]),
'rep': {'avg': tensor(0.8912), 'std': tensor(0.1571)},
'std': tensor([0.0371, 0.1232, 0.1976, 0.9536])},
'nes': { 'all': {'avg': tensor(0.6771), 'std': tensor(0.2891)},
'avg': tensor([0.9326, 0.8038, 0.6852, 0.2867]),
'rep': {'avg': tensor(0.8072), 'std': tensor(0.1596)},
'std': tensor([0.0695, 0.1266, 0.1578, 0.2339])},
'nes_output': { 'all': {'avg': None, 'std': None},
'avg': tensor(0.2975),
'rep': {'avg': None, 'std': None},
'std': tensor(0.0945)},
'query_loss': { 'all': {'avg': None, 'std': None},
'avg': tensor(12.3746),
'rep': {'avg': None, 'std': None},
'std': tensor(13.7910)}}
compare to:
{
"cca": {
"all": {
"avg": "tensor(0.5144)",
"std": "tensor(0.1553)"
},
"avg": "tensor([0.6023, 0.5612, 0.4874, 0.4066])",
"rep": {
"avg": "tensor(0.5503)",
"std": "tensor(0.0796)"
},
"std": "tensor([0.0285, 0.0367, 0.1004, 0.2493])"
},
"cka": {
"all": {
"avg": "tensor(0.7888)",
"std": "tensor(0.3444)"
},
"avg": "tensor([1.0000, 0.9840, 0.9439, 0.2271])",
"rep": {
"avg": "tensor(0.9760)",
"std": "tensor(0.0468)"
},
"std": "tensor([5.7627e-07, 2.9689e-02, 6.3541e-02, 2.1684e-01])"
},
"cosine": {
"all": {
"avg": "tensor(0.5945)",
"std": "tensor(0.7146)"
},
"avg": "tensor([ 0.9825, 0.9001, 0.7907, -0.2953])",
"rep": {
"avg": "tensor(0.8911)",
"std": "tensor(0.1571)"
},
"std": "tensor([0.0371, 0.1231, 0.1975, 0.9554])"
},
"nes": {
"all": {
"avg": "tensor(0.6773)",
"std": "tensor(0.2886)"
},
"avg": "tensor([0.9326, 0.8037, 0.6849, 0.2881])",
"rep": {
"avg": "tensor(0.8070)",
"std": "tensor(0.1595)"
},
"std": "tensor([0.0695, 0.1265, 0.1576, 0.2341])"
},
"nes_output": {
"all": {
"avg": "None",
"std": "None"
},
"avg": "tensor(0.2976)",
"rep": {
"avg": "None",
"std": "None"
},
"std": "tensor(0.0945)"
},
"query_loss": {
"all": {
"avg": "None",
"std": "None"
},
"avg": "tensor(12.3616)",
"rep": {
"avg": "None",
"std": "None"
},
"std": "tensor(13.7976)"
}
}
I've created a vertical menu and tabs changing in the middle of the page. I changed two words on the code source and I set apart two different divs
menu:
<div class="arrowgreen">
<ul class="tabNavigation">
<li> <a href="#first" title="Home">Tab 1</a></li>
<li> <a href="#secund" title="Home">Tab 2</a></li>
</ul>
</div>
content:
<div class="pages">
<div id="first">
CONTENT 1
</div>
<div id="secund">
CONTENT 2
</div>
</div>
the code works with the div apart
$(function () {
var tabContainers = $('div.pages > div');
$('div.arrowgreen ul.tabNavigation a').click(function () {
tabContainers.hide().filter(this.hash).show();
$('div.arrowgreen ul.tabNavigation a').removeClass('selected');
$(this).addClass('selected');
return false;
}).filter(':first').click();
});
Adding a column using SSMS or ALTER TABLE .. ADD
will not drop any existing data.
Google Chrome Developer Tools has (a currently experimental) feature called CSS Overview which will allow you to find unused CSS rules.
To enable it follow these steps:
If you use Android Studio .Open the SDK-Manager, checked "Show Package Details" you will find out "Android Wear ARM EABI v7a System Image" download it , success !
The typical way is with scanf
:
int input_value;
scanf("%d", &input_value);
In most cases, however, you want to check whether your attempt at reading input succeeded. scanf
returns the number of items it successfully converted, so you typically want to compare the return value against the number of items you expected to read. In this case you're expecting to read one item, so:
if (scanf("%d", &input_value) == 1)
// it succeeded
else
// it failed
Of course, the same is true of all the scanf
family (sscanf
, fscanf
and so on).
Salaamun Alekum
Works For Google Chrome
<textarea placeholder="Enter Choice#1 Enter Choice#2 Enter Choice#3"></textarea>
I Tested This On Windows 10.0 (Build 10240) And Google Chrome Version 47.0.2526.80 m
08:43:08 AST 6 Rabi Al-Awwal, 1437 Thursday, 17 December 2015
Thank You
List View
<iframe src="https://drive.google.com/embeddedfolderview?id=YOURID#list" width="700" height="500" frameborder="0"></iframe>
Grid View
<iframe src="https://drive.google.com/embeddedfolderview?id=YOURID#grid" width="700" height="500" frameborder="0"></iframe>
Read More at: https://thomas.vanhoutte.be/miniblog/embed-add-google-drive-folder-file-website/
You can use calc
:
height: calc(100% - 18px);
Note that some old browsers don't support the CSS3 calc()
function, so implementing the vendor-specific versions of the function may be required:
/* Firefox */
height: -moz-calc(100% - 18px);
/* WebKit */
height: -webkit-calc(100% - 18px);
/* Opera */
height: -o-calc(100% - 18px);
/* Standard */
height: calc(100% - 18px);
In my case , I had removed gradlew and gradle folders from project. Reran clean build tasks through "Run Gradle Task" from Gradle Projects window in intellij
I had a similar issue with restoring using SQL Management Studio. I tried to restore a backup of the database to a new one with a different name. At first this failed and after fixing the new database's file names it was successfully performed - in any case the issue I'm describing re-occurred even if I got this right from the first time. So, after the restoration, the original database remained with a (Restoring...) next to its name. Considering the answers of the forum above (Bhusan's) I tried running in the query editor on the side the following:
RESTORE DATABASE "[NAME_OF_DATABASE_STUCK_IN_RESTORING_STATE]"
which fixed the issue. I was having trouble at first because of the database name which contained special characters. I resolved this by adding double quotes around - single quotes wouldn't work giving an "Incorrect syntax near ..." error.
This was the minimal solution I've tried to resolve this issue (stuck database in restoring state) and I hope it can be applied to more cases.
The above answers will work, but just in case you want a different approach, try classname: https://github.com/JedWatson/classnames
There are several approaches to customize the error handling behavior with JAX-RS. Here are three of the easier ways.
The first approach is to create an Exception class that extends WebApplicationException.
Example:
public class NotAuthorizedException extends WebApplicationException {
public NotAuthorizedException(String message) {
super(Response.status(Response.Status.UNAUTHORIZED)
.entity(message).type(MediaType.TEXT_PLAIN).build());
}
}
And to throw this newly create Exception you simply:
@Path("accounts/{accountId}/")
public Item getItem(@PathParam("accountId") String accountId) {
// An unauthorized user tries to enter
throw new NotAuthorizedException("You Don't Have Permission");
}
Notice, you don't need to declare the exception in a throws clause because WebApplicationException is a runtime Exception. This will return a 401 response to the client.
The second and easier approach is to simply construct an instance of the WebApplicationException
directly in your code. This approach works as long as you don't have to implement your own application Exceptions.
Example:
@Path("accounts/{accountId}/")
public Item getItem(@PathParam("accountId") String accountId) {
// An unauthorized user tries to enter
throw new WebApplicationException(Response.Status.UNAUTHORIZED);
}
This code too returns a 401 to the client.
Of course, this is just a simple example. You can make the Exception much more complex if necessary, and you can generate what ever http response code you need to.
One other approach is to wrap an existing Exception, perhaps an ObjectNotFoundException
with an small wrapper class that implements the ExceptionMapper
interface annotated with a @Provider
annotation. This tells the JAX-RS runtime, that if the wrapped Exception is raised, return the response code defined in the ExceptionMapper
.
Another option is to use the defer attribute on the script, but it's only appropriate for external scripts with a src attribute:
<script src = "exampleJsFile.js" defer> </script>
Anyone can use underscore _ (its Okay)
No one should use hypen - (its Bad practice)
No one should use capital letters inside package names (Bad practice)
NOTE: Here "Bad Practice" is meant for technically you are allowed to use that, but conventionally its not in good manners to write.
Source: Naming a Package(docs.oracle)
If rooted:
Runtime.getRuntime().exec("su -c service call activity 42 s16 com.example.your_app");
edit: I guess it's now starting to be safe to use the native JSON.stringify() method, supported by most browsers (yes, even IE8+ if you're wondering).
As simple as:
JSON.stringify(yourData)
You should encode you data in JSON before sending it, you can't just send an object like this as POST data.
I recommand using the jQuery json plugin to do so. You can then use something like this in jQuery:
$.post(_saveDeviceUrl, {
data : $.toJSON(postData)
}, function(response){
//Process your response here
}
);
Following are some of the places where you can use annotations.
a. Annotations can be used by compiler to detect errors and suppress warnings
b. Software tools can use annotations to generate code, xml files, documentation etc., For example, Javadoc use annotations while generating java documentation for your class.
c. Runtime processing of the application can be possible via annotations.
d. You can use annotations to describe the constraints (Ex: @Null, @NotNull, @Max, @Min, @Email).
e. Annotations can be used to describe type of an element. Ex: @Entity, @Repository, @Service, @Controller, @RestController, @Resource etc.,
f. Annotation can be used to specify the behaviour. Ex: @Transactional, @Stateful
g. Annotation are used to specify how to process an element. Ex: @Column, @Embeddable, @EmbeddedId
h. Test frameworks like junit and testing use annotations to define test cases (@Test), define test suites (@Suite) etc.,
i. AOP (Aspect Oriented programming) use annotations (@Before, @After, @Around etc.,)
j. ORM tools like Hibernate, Eclipselink use annotations
You can refer this link for more details on annotations.
You can refer this link to see how annotations are used to build simple test suite.
Using pathlib you can get the folder in which the current file is located. __file__
is the pathname of the file from which the module was loaded.
Ref: docs
import pathlib
current_dir = pathlib.Path(__file__).parent
current_file = pathlib.Path(__file__)
Doc ref: link
There are ways of executing tests in a given order. Normally though, tests have to be repeatable and independent to guarantee it is testing only the desired functionality and is not dependent on side effects of code outside of what is being tested.
So, to answer your question, you'll need to provide more information such as WHY it is important to run tests in a specific order.
As an alternative to bc, you can use awk within your script.
For example:
echo "$IMG_WIDTH $IMG2_WIDTH" | awk '{printf "%.2f \n", $1/$2}'
In the above, " %.2f " tells the printf function to return a floating point number with two digits after the decimal place. I used echo to pipe in the variables as fields since awk operates properly on them. " $1 " and " $2 " refer to the first and second fields input into awk.
And you can store the result as some other variable using:
RESULT = `echo ...`
I think of it this way
+----------------+
| super |
+----------------+ <-----------------+
| +------------+ | |
| | this | | <-+ |
| +------------+ | | |
| | @method1() | | | |
| | @method2() | | | |
| +------------+ | | |
| method4() | | |
| method5() | | |
+----------------+ | |
We instantiate that class, not that one!
Let me move that subclass a little to the left to reveal what's beneath... (Man, I do love ASCII graphics)
We are here
|
/ +----------------+
| | super |
v +----------------+
+------------+ |
| this | |
+------------+ |
| @method1() | method1() |
| @method2() | method2() |
+------------+ method3() |
| method4() |
| method5() |
+----------------+
Then we call the method
over here...
| +----------------+
_____/ | super |
/ +----------------+
| +------------+ | bar() |
| | this | | foo() |
| +------------+ | method0() |
+-> | @method1() |--->| method1() | <------------------------------+
| @method2() | ^ | method2() | |
+------------+ | | method3() | |
| | method4() | |
| | method5() | |
| +----------------+ |
\______________________________________ |
\ |
| |
...which calls super, thus calling the super's method1() here, so that that
method (the overidden one) is executed instead[of the overriding one].
Keep in mind that, in the inheritance hierarchy, since the instantiated
class is the sub one, for methods called via super.something() everything
is the same except for one thing (two, actually): "this" means "the only
this we have" (a pointer to the class we have instantiated, the
subclass), even when java syntax allows us to omit "this" (most of the
time); "super", though, is polymorphism-aware and always refers to the
superclass of the class (instantiated or not) that we're actually
executing code from ("this" is about objects [and can't be used in a
static context], super is about classes).
In other words, quoting from the Java Language Specification:
The form
super.Identifier
refers to the field namedIdentifier
of the current object, but with the current object viewed as an instance of the superclass of the current class.The form
T.super.Identifier
refers to the field namedIdentifier
of the lexically enclosing instance corresponding toT
, but with that instance viewed as an instance of the superclass ofT
.
In layman's terms, this
is basically an object (*the** object; the very same object you can move around in variables), the instance of the instantiated class, a plain variable in the data domain; super
is like a pointer to a borrowed block of code that you want to be executed, more like a mere function call, and it's relative to the class where it is called.
Therefore if you use super
from the superclass you get code from the superduper class [the grandparent] executed), while if you use this
(or if it's used implicitly) from a superclass it keeps pointing to the subclass (because nobody has changed it - and nobody could).
from datetime import datetime, timedelta
nine_hours_from_now = datetime.now() + timedelta(hours=9)
#datetime.datetime(2012, 12, 3, 23, 24, 31, 774118)
And then use string formatting to get the relevant pieces:
>>> '{:%H:%M:%S}'.format(nine_hours_from_now)
'23:24:31'
If you're only formatting the datetime then you can use:
>>> format(nine_hours_from_now, '%H:%M:%S')
'23:24:31'
Or, as @eumiro has pointed out in comments - strftime
Adding another simple alternative that is quite elegant in my opinion.
Your plot:
plot(1:3, rnorm(3), pch = 1, lty = 1, type = "o", ylim=c(-2,2))
lines(1:3, rnorm(3), pch = 2, lty = 2, type="o")
Legend:
legend("bottomright", c("group A", "group B"), pch=c(1,2), lty=c(1,2),
inset=c(0,1), xpd=TRUE, horiz=TRUE, bty="n"
)
Result:
Here only the second line of the legend was added to your example. In turn:
inset=c(0,1)
- moves the legend by fraction of plot region in (x,y) directions. In this case the legend is at "bottomright"
position. It is moved by 0 plotting regions in x direction (so stays at "right") and by 1 plotting region in y direction (from bottom to top). And it so happens that it appears right above the plot.xpd=TRUE
- let's the legend appear outside of plotting region.horiz=TRUE
- instructs to produce a horizontal legend.bty="n"
- a style detail to get rid of legend bounding box.Same applies when adding legend to the side:
par(mar=c(5,4,2,6))
plot(1:3, rnorm(3), pch = 1, lty = 1, type = "o", ylim=c(-2,2))
lines(1:3, rnorm(3), pch = 2, lty = 2, type="o")
legend("topleft", c("group A", "group B"), pch=c(1,2), lty=c(1,2),
inset=c(1,0), xpd=TRUE, bty="n"
)
Here we simply adjusted legend positions and added additional margin space to the right side of the plot. Result:
I'm surprised nobody suggested using Applet. Use Applet
. You'll have to supply the beep audio file as a wav
file, but it works. I tried this on Ubuntu:
package javaapplication2;
import java.applet.Applet;
import java.applet.AudioClip;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
public class JavaApplication2 {
public static void main(String[] args) throws MalformedURLException {
File file = new File("/path/to/your/sounds/beep3.wav");
URL url = null;
if (file.canRead()) {url = file.toURI().toURL();}
System.out.println(url);
AudioClip clip = Applet.newAudioClip(url);
clip.play();
System.out.println("should've played by now");
}
}
//beep3.wav was available from: http://www.pacdv.com/sounds/interface_sound_effects/beep-3.wav
You need to give height
for the parent element too! Check out this fiddle.
html, body {height: 100%;}
#content, .container-fluid, .span9
{
border: 1px solid #000;
overflow-y:auto;
height:100%;
}?
$(document).ready(function(){
$(window).resize(function(){
$(".fullheight").height($(document).height());
});
});
Here's a rev 0.0.1 of an attempt at a dark background colour scheme for Eclipse (and a screenshot). Any feedback at all? (this is a big departure from what I normally use for Vim.
<?php
list($width, $height) = getimagesize("http://site.com/image.png");
$arr = array('h' => $height, 'w' => $width );
?>
I upgraded mac os to macOS High Sierra - 10.13.3 and faced a similar issue while trying to install watchman (with command - brew install watchman).
ran the command: xcode-select --install, then ran "brew install watchman" - Everything works fine!
flex-grow - This defines the ability for a flex item to grow if necessary. It accepts a unitless value that serves as a proportion. It dictates what amount of the available space inside the flex container the item should take up.
If all items have flex-grow set to 1, the remaining space in the container will be distributed equally to all children. If one of the children has a value of 2, the remaining space would take up twice as much space as the others (or it will try to, at least). See more here
.parent {_x000D_
display: flex;_x000D_
}_x000D_
_x000D_
.child {_x000D_
flex-grow: 1; // It accepts a unitless value that serves as a proportion_x000D_
}_x000D_
_x000D_
.left {_x000D_
background: red;_x000D_
}_x000D_
_x000D_
.right {_x000D_
background: green;_x000D_
}
_x000D_
<div class="parent"> _x000D_
<div class="child left">_x000D_
Left 50%_x000D_
</div>_x000D_
<div class="child right">_x000D_
Right 50%_x000D_
</div>_x000D_
</div>
_x000D_
var test = {'red':'#FF0000', 'blue':'#0000FF'};_x000D_
delete test.blue; // or use => delete test['blue'];_x000D_
console.log(test);
_x000D_
this deletes test.blue
Add the following line in your Dockerfile then rebuild the docker image.
RUN apt-get update && apt-get install -y vim
My bible for JPA work is the Java Persistence wikibook. It has a section on unidirectional OneToMany
which explains how to do this with a @JoinColumn
annotation. In your case, i think you would want:
@OneToMany
@JoinColumn(name="TXTHEAD_CODE")
private Set<Text> text;
I've used a Set
rather than a List
, because the data itself is not ordered.
The above is using a defaulted referencedColumnName
, unlike the example in the wikibook. If that doesn't work, try an explicit one:
@OneToMany
@JoinColumn(name="TXTHEAD_CODE", referencedColumnName="DATREG_META_CODE")
private Set<Text> text;
var buttons = document.getElementsByTagName('button');
var buttonsLength = buttons.length;
for (var i = 0; i < buttonsLength; i++){
buttons[i].addEventListener('click', clickResponse, false);
};
function clickResponse(){
// do something based on button selection here...
alert(this.id);
}
Working JSFiddle here.
Try this
import os
import subprocess
DIR = os.path.join('C:\\', 'Users', 'Sergey', 'Desktop', 'helloword.py')
subprocess.call(['python', DIR])
You cannot assign expressions with types such as List<NavigableMap<String,String>>
to the first.
(If you want to know why you can't assign List<String>
to List<Object>
see a zillion other questions on SO.)
This issue recently became relevant for me because of the notch in my Pixel 3XL. I really liked android developer's solution, but I wanted to be able to get the status bar height at will, since it was specifically necessary for a full screen animation that I needed to play. The function below enabled a reliable query:
private val DEFAULT_INSET = 96
fun getInsets(view: View?): Int {
var inset = DEFAULT_INSET
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//Safe because only P supports notches
inset = view?.rootWindowInsets?.stableInsetTop ?: DEFAULT_INSET
}
return inset
}
fun blurView(rootView: View?, a: SpacesActivity?) {
val screenBitmap = getBitmapFromView(rootView!!)
val heightDifference = getInsets(rootView)
val croppedMap = Bitmap.createBitmap(
screenBitmap, 0, heightDifference,
screenBitmap.width,
screenBitmap.height - heightDifference)
val blurredScreen = blurBitmap(croppedMap)
if (blurredScreen != null) {
val myDrawable = BitmapDrawable(a!!.resources, blurredScreen)
a.errorHudFrameLayout?.background = myDrawable
a.appBarLayout?.visibility = View.INVISIBLE
}
}
And then in the activity class:
fun blurView() {
this.runOnUiThread {
Helper.blurView(this)
}
}
You will of course want to make pass a weak reference of the activity to the static Helper class method parameter, but for the sake of brevity I refrained in this example. The blurBitmap
and errorHudFrameLayout
are omitted for the same reason, since they don't directly pertain to obtaining the height of the status bar.
When you say [:-1]
you are stripping the last element. Instead of slicing the string, you can apply startswith
and endswith
on the string object itself like this
if str1.startswith('"') and str1.endswith('"'):
So the whole program becomes like this
>>> str1 = '"xxx"'
>>> if str1.startswith('"') and str1.endswith('"'):
... print "hi"
>>> else:
... print "condition fails"
...
hi
Even simpler, with a conditional expression, like this
>>> print("hi" if str1.startswith('"') and str1.endswith('"') else "fails")
hi
Use Split() function to slice them and ToList() to return them as a list.
var names = "Brian,Joe,Chris";
List<string> nameList = names.Split(',').ToList();
As far as I know, there's no method to do what you want; at least not directly. I'd store the photosLocation
as a path relative to the application; for example: "~/Images/"
. This way, you could use MapPath to get the physical location, and ResolveUrl
to get the URL (with a bit of help from System.IO.Path
):
string photosLocationPath = HttpContext.Current.Server.MapPath(photosLocation);
if (Directory.Exists(photosLocationPath))
{
string[] files = Directory.GetFiles(photosLocationPath, "*.jpg");
if (files.Length > 0)
{
string filenameRelative = photosLocation + Path.GetFilename(files[0])
return Page.ResolveUrl(filenameRelative);
}
}
On older versions of Docker it seems you need to use this order:
docker build -t tag .
and not
docker build . -t tag
For example, you have a Button
named as Button1
. First click on it it will open the EventHandler
of that Button2
to call another Form
you should write the following code to your Button.
your name example=form2.
form2 obj=new form2();
obj.show();
To close form1, write the following code:
form1.visible=false;
or
form1.Hide();
A DataTable or DataSet object will have a Select Method that will return a DataRow array of results based on the query passed in as it's parameter.
Looking at your requirement your filterexpression will have to be somewhat general to make this work.
myDataTable.Select("columnName1 like '%" + value + "%'");
Use the function advance(startIndex, endIndex)
:
var str = "45+22"
str = str.substringToIndex(advance(str.startIndex, countElements(str) - 1))
I usually use pyexiv2 to set exif information in JPG files, but when I import the library in a script QGIS script crash.
I found a solution using the library exif:
https://pypi.org/project/exif/
It's so easy to use, and with Qgis I don,'t have any problem.
In this code I insert GPS coordinates to a snapshot of screen:
from exif import Image
with open(file_name, 'rb') as image_file:
my_image = Image(image_file)
my_image.make = "Python"
my_image.gps_latitude_ref=exif_lat_ref
my_image.gps_latitude=exif_lat
my_image.gps_longitude_ref= exif_lon_ref
my_image.gps_longitude= exif_lon
with open(file_name, 'wb') as new_image_file:
new_image_file.write(my_image.get_file())
since you only want the files, you don't need to treat it as a git repo.
rsync -rlp --exclude '.git' user@host:path/to/git/repo/ .
and this only works with local path and remote ssh/rsync path, it may not work if the remote server only provides git:// or https:// access.
In my case, selecting Debug JS Remotely launched Chrome, but did not connect with the android device. Normally, the new Chrome tab/window would have the debugging URL pre-populated in the address bar, but in this case the address bar was blank. After the timeout period, the "Unable to connect with remote debugger" error message was displayed. I fixed this with the following procedure:
adb reverse tcp:8081 tcp:8081
http://localhost:8081/debugger-ui
into the address field of my Chrome browser. You should see the normal debugging screen but your app will still not be connected.That should fix the problem. If not, you may need to take the following additional steps:
react-native run-android
In my case I had a previous mySQL server installation (with non-standard port), and I re-installed to a different directory & port. Then I got the same issue. To resolve, you click on home + add new connection.
If you need to know the port of your server, you can find it when you start My SQL command line client via All Programs -> MySQL -> MySQL ServerX.Y -> MySQL X.Y Command Line Client and run command status (as below)
More precise:
$.each($('.testimonal'), function(index, value) {
console.log(index + ':' + value);
});
I faced the same issue today,
And solved it easily by following points
1) Start the StandAlone SDK manager (To open the standalone sdk manager - Tools>Android>SDKManager> at Bottom YOu will see a link to launch StandAlone SDK manager)
2) Delete tha package of SDK Build Tools that you have already installed for e.g 24.0.0 rc4.
3) Close the standalone SDK manager then Restart Android Studio.
4) Once after restart the gradle will start building the project and you will get an alert download the package of SDK build tool and Sync. CLick on that and you will start downloading like that...
I hope this helps
I currently use a very easy implementation, which does not require to use converters or special classes. The code I use is the following:
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
DialogHelper.dismiss();
if (response.isSuccessful()) {
// Do your success stuff...
} else {
try {
JSONObject jObjError = new JSONObject(response.errorBody().string());
Toast.makeText(getContext(), jObjError.getJSONObject("error").getString("message"), Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
For reference : Why does angularjs include an empty option in select?
The empty
option
is generated when a value referenced byng-model
doesn't exist in a set of options passed tong-options
. This happens to prevent accidental model selection: AngularJS can see that the initial model is either undefined or not in the set of options and don't want to decide model value on its own.In short: the empty option means that no valid model is selected (by valid I mean: from the set of options). You need to select a valid model value to get rid of this empty option.
Change your code like this
var MyApp=angular.module('MyApp1',[])
MyApp.controller('MyController', function($scope) {
$scope.feed = {};
//Configuration
$scope.feed.configs = [
{'name': 'Config 1',
'value': 'config1'},
{'name': 'Config 2',
'value': 'config2'},
{'name': 'Config 3',
'value': 'config3'}
];
//Setting first option as selected in configuration select
$scope.feed.config = $scope.feed.configs[0].value;
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div ng-app="MyApp1">
<div ng-controller="MyController">
<input type="text" ng-model="feed.name" placeholder="Name" />
<!-- <select ng-model="feed.config">
<option ng-repeat="template in configs">{{template.name}}</option>
</select> -->
<select ng-model="feed.config" ng-options="template.value as template.name for template in feed.configs">
</select>
</div>
</div>
_x000D_
UPDATE (Dec 31, 2015)
If You don't want to set a default value and want to remove blank option,
<select ng-model="feed.config" ng-options="template.value as template.name for template in feed.configs">
<option value="" selected="selected">Choose</option>
</select>
And in JS no need to initialize value.
$scope.feed.config = $scope.feed.configs[0].value;
If you don't want add the /s
regex modifier (perhaps you still want .
to retain its original meaning elsewhere in the regex), you may also use a character class. One possibility:
[\S\s]
a character which is not a space or is a space. In other words, any character.
You can also change modifiers locally in a small part of the regex, like so:
(?s:.)
The translation is correct, the typing of the expression isn't. TypeScript is incorrectly typing the expression new Thing[100]
as an array. It should be an error to index Thing
, a constructor function, using the index operator. In C# this would allocate an array of 100 elements. In JavaScript this calls the value at index 100 of Thing
as if was a constructor. Since that values is undefined
it raises the error you mentioned. In JavaScript and TypeScript you want new Array(100)
instead.
You should report this as a bug on CodePlex.
MenuItem Import = menu.findItem(R.id.Import);
Import.setVisible(false)
Use .lower()
- For example:
s = "Kilometer"
print(s.lower())
The official 2.x documentation is here: str.lower()
The official 3.x documentation is here: str.lower()
You can use casting in the select clause like:
SELECT id, name, CAST(hide AS BOOLEAN) FROM table_name;
An rvalue reference is a type that behaves much like the ordinary reference X&, with several exceptions. The most important one is that when it comes to function overload resolution, lvalues prefer old-style lvalue references, whereas rvalues prefer the new rvalue references:
void foo(X& x); // lvalue reference overload
void foo(X&& x); // rvalue reference overload
X x;
X foobar();
foo(x); // argument is lvalue: calls foo(X&)
foo(foobar()); // argument is rvalue: calls foo(X&&)
So what is an rvalue? Anything that is not an lvalue. An lvalue being an expression that refers to a memory location and allows us to take the address of that memory location via the & operator.
It is almost easier to understand first what rvalues accomplish with an example:
#include <cstring>
class Sample {
int *ptr; // large block of memory
int size;
public:
Sample(int sz=0) : ptr{sz != 0 ? new int[sz] : nullptr}, size{sz}
{
if (ptr != nullptr) memset(ptr, 0, sz);
}
// copy constructor that takes lvalue
Sample(const Sample& s) : ptr{s.size != 0 ? new int[s.size] :\
nullptr}, size{s.size}
{
if (ptr != nullptr) memcpy(ptr, s.ptr, s.size);
std::cout << "copy constructor called on lvalue\n";
}
// move constructor that take rvalue
Sample(Sample&& s)
{ // steal s's resources
ptr = s.ptr;
size = s.size;
s.ptr = nullptr; // destructive write
s.size = 0;
cout << "Move constructor called on rvalue." << std::endl;
}
// normal copy assignment operator taking lvalue
Sample& operator=(const Sample& s)
{
if(this != &s) {
delete [] ptr; // free current pointer
size = s.size;
if (size != 0) {
ptr = new int[s.size];
memcpy(ptr, s.ptr, s.size);
} else
ptr = nullptr;
}
cout << "Copy Assignment called on lvalue." << std::endl;
return *this;
}
// overloaded move assignment operator taking rvalue
Sample& operator=(Sample&& lhs)
{
if(this != &s) {
delete [] ptr; //don't let ptr be orphaned
ptr = lhs.ptr; //but now "steal" lhs, don't clone it.
size = lhs.size;
lhs.ptr = nullptr; // lhs's new "stolen" state
lhs.size = 0;
}
cout << "Move Assignment called on rvalue" << std::endl;
return *this;
}
//...snip
};
The constructor and assignment operators have been overloaded with versions that take rvalue references. Rvalue references allow a function to branch at compile time (via overload resolution) on the condition "Am I being called on an lvalue or an rvalue?". This allowed us to create more efficient constructor and assignment operators above that move resources rather copy them.
The compiler automatically branches at compile time (depending on the whether it is being invoked for an lvalue or an rvalue) choosing whether the move constructor or move assignment operator should be called.
Summing up: rvalue references allow move semantics (and perfect forwarding, discussed in the article link below).
One practical easy-to-understand example is the class template std::unique_ptr. Since a unique_ptr maintains exclusive ownership of its underlying raw pointer, unique_ptr's can't be copied. That would violate their invariant of exclusive ownership. So they do not have copy constructors. But they do have move constructors:
template<class T> class unique_ptr {
//...snip
unique_ptr(unique_ptr&& __u) noexcept; // move constructor
};
std::unique_ptr<int[] pt1{new int[10]};
std::unique_ptr<int[]> ptr2{ptr1};// compile error: no copy ctor.
// So we must first cast ptr1 to an rvalue
std::unique_ptr<int[]> ptr2{std::move(ptr1)};
std::unique_ptr<int[]> TakeOwnershipAndAlter(std::unique_ptr<int[]> param,\
int size)
{
for (auto i = 0; i < size; ++i) {
param[i] += 10;
}
return param; // implicitly calls unique_ptr(unique_ptr&&)
}
// Now use function
unique_ptr<int[]> ptr{new int[10]};
// first cast ptr from lvalue to rvalue
unique_ptr<int[]> new_owner = TakeOwnershipAndAlter(\
static_cast<unique_ptr<int[]>&&>(ptr), 10);
cout << "output:\n";
for(auto i = 0; i< 10; ++i) {
cout << new_owner[i] << ", ";
}
output:
10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
static_cast<unique_ptr<int[]>&&>(ptr)
is usually done using std::move
// first cast ptr from lvalue to rvalue
unique_ptr<int[]> new_owner = TakeOwnershipAndAlter(std::move(ptr),0);
An excellent article explaining all this and more (like how rvalues allow perfect forwarding and what that means) with lots of good examples is Thomas Becker's C++ Rvalue References Explained. This post relied heavily on his article.
A shorter introduction is A Brief Introduction to Rvalue References by Stroutrup, et. al
I was looking for something similar - a list of constraints on classes that provide Extension Methods. Seems tough to find a concise list so here goes:
You can't have any private or protected anything - fields, methods, etc.
It must be a static class, as in public static class...
.
Only methods can be in the class, and they must all be public static.
You can't have conventional static methods - ones that don't include a this argument aren't allowed.
All methods must begin:
public static ReturnType MethodName(this ClassName _this, ...)
So the first argument is always the this reference.
There is an implicit problem this creates - if you add methods that require a lock of any sort, you can't really provide it at the class level. Typically you'd provide a private instance-level lock, but it's not possible to add any private fields, leaving you with some very awkward options, like providing it as a public static on some outside class, etc. Gets dicey. Signs the C# language had kind of a bad turn in the design for these.
The workaround is to use your Extension Method class as just a Facade to a regular class, and all the static methods in your Extension class just call the real class, probably using a Singleton.
Its all depend on your client data access-layer. Many ORM frameworks rely on explicitly querying the SCOPE_IDENTITY during the insert operation.
If you are in complete control over the data access layer then is arguably better to return SCOPE_IDENTITY() as an output parameter. Wrapping the return in a result set adds unnecessary meta data overhead to describe the result set, and complicates the code to process the requests result.
If you prefer a result set return, then again is arguable better to use the OUTPUT clause:
INSERT INTO MyTable (col1, col2, col3)
OUTPUT INSERTED.id, col1, col2, col3
VALUES (@col1, @col2, @col3);
This way you can get the entire inserted row back, including default and computed columns, and you get a result set containing one row for each row inserted, this working correctly with set oriented batch inserts.
Overall, I can't see a single case when returning SCOPE_IDENTITY()
as a result set would be a good practice.
It does not work because sequence does not work in following scenarios:
Source: http://www.orafaq.com/wiki/ORA-02287
However this does work:
insert into table_name
(col1, col2)
select my_seq.nextval, inner_view.*
from (select 'some value' someval
from dual
union all
select 'another value' someval
from dual) inner_view;
Try it out:
create table table_name(col1 varchar2(100), col2 varchar2(100));
create sequence vcert.my_seq
start with 1
increment by 1
minvalue 0;
select * from table_name;
Starting in MongoDB 3.4, you can use the $sortByCount
aggregation.
Groups incoming documents based on the value of a specified expression, then computes the count of documents in each distinct group.
https://docs.mongodb.com/manual/reference/operator/aggregation/sortByCount/
For example:
db.contest.aggregate([
{ $sortByCount: "$province" }
]);
If SESSION_START_DATE_TIME is of type TIMESTAMP you may want to try using the SQL function TO_TIMESTAMP. Here is an example:
SQL> CREATE TABLE t (ts TIMESTAMP);
Table created.
SQL> INSERT INTO t
2 VALUES (
3 TO_TIMESTAMP (
4 '1/12/2012 5:03:27.221008 PM'
5 ,'mm/dd/yyyy HH:MI:SS.FF AM'
6 )
7 );
1 row created.
SQL> SELECT *
2 FROM t
3 WHERE ts =
4 TO_TIMESTAMP (
5 '1/12/2012 5:03:27.221008 PM'
6 ,'mm/dd/yyyy HH:MI:SS.FF AM'
7 );
TS
-------------------------------------------------
12-JAN-12 05.03.27.221008 PM
We have a couple of projects where this issue was logged from time to time on the Android Market. I found the following issues in the manifests:
If the package name is com.test then activities names should be .ActivityName
(with a leading dot), not just ActivityName
.
For some classes, those that appeared in the logs most often, the class name was specified as com.test.Name
while it should have been .Name
.
I guess many implementations of Android handle these minor issues successfully (this is why the exception never happened in testing), while others few are throwing the exception.
Just add other control types:
public static void ClearControls(Control c)
{
foreach (Control Ctrl in c.Controls)
{
//Console.WriteLine(Ctrl.GetType().ToString());
//MessageBox.Show ( (Ctrl.GetType().ToString())) ;
switch (Ctrl.GetType().ToString())
{
case "System.Windows.Forms.CheckBox":
((CheckBox)Ctrl).Checked = false;
break;
case "System.Windows.Forms.TextBox":
((TextBox)Ctrl).Text = "";
break;
case "System.Windows.Forms.RichTextBox":
((RichTextBox)Ctrl).Text = "";
break;
case "System.Windows.Forms.ComboBox":
((ComboBox)Ctrl).SelectedIndex = -1;
((ComboBox)Ctrl).SelectedIndex = -1;
break;
case "System.Windows.Forms.MaskedTextBox":
((MaskedTextBox)Ctrl).Text = "";
break;
case "Infragistics.Win.UltraWinMaskedEdit.UltraMaskedEdit":
((UltraMaskedEdit)Ctrl).Text = "";
break;
case "Infragistics.Win.UltraWinEditors.UltraDateTimeEditor":
DateTime dt = DateTime.Now;
string shortDate = dt.ToShortDateString();
((UltraDateTimeEditor)Ctrl).Text = shortDate;
break;
case "System.Windows.Forms.RichTextBox":
((RichTextBox)Ctrl).Text = "";
break;
case " Infragistics.Win.UltraWinGrid.UltraCombo":
((UltraCombo)Ctrl).Text = "";
break;
case "Infragistics.Win.UltraWinEditors.UltraCurrencyEditor":
((UltraCurrencyEditor)Ctrl).Value = 0.0m;
break;
default:
if (Ctrl.Controls.Count > 0)
ClearControls(Ctrl);
break;
}
}
}
You can abort a task like a thread if you can cause the task to be created on its own thread and call Abort
on its Thread
object. By default, a task runs on a thread pool thread or the calling thread - neither of which you typically want to abort.
To ensure the task gets its own thread, create a custom scheduler derived from TaskScheduler
. In your implementation of QueueTask
, create a new thread and use it to execute the task. Later, you can abort the thread, which will cause the task to complete in a faulted state with a ThreadAbortException
.
Use this task scheduler:
class SingleThreadTaskScheduler : TaskScheduler
{
public Thread TaskThread { get; private set; }
protected override void QueueTask(Task task)
{
TaskThread = new Thread(() => TryExecuteTask(task));
TaskThread.Start();
}
protected override IEnumerable<Task> GetScheduledTasks() => throw new NotSupportedException(); // Unused
protected override bool TryExecuteTaskInline(Task task, bool taskWasPreviouslyQueued) => throw new NotSupportedException(); // Unused
}
Start your task like this:
var scheduler = new SingleThreadTaskScheduler();
var task = Task.Factory.StartNew(action, cancellationToken, TaskCreationOptions.LongRunning, scheduler);
Later, you can abort with:
scheduler.TaskThread.Abort();
Note that the caveat about aborting a thread still applies:
The
Thread.Abort
method should be used with caution. Particularly when you call it to abort a thread other than the current thread, you do not know what code has executed or failed to execute when the ThreadAbortException is thrown, nor can you be certain of the state of your application or any application and user state that it is responsible for preserving. For example, callingThread.Abort
may prevent static constructors from executing or prevent the release of unmanaged resources.
In Java create the pattern with Pattern p = Pattern.compile("^\\w{14}$");
for further information see the javadoc
The fastest way to check if a string contains another string is using indexOf
:
if (code.indexOf('ST1') !== -1) {
// string code has "ST1" in it
} else {
// string code does not have "ST1" in it
}
SELECT * from games WHERE (lower(title) LIKE 'age of empires III');
The above query doesn't return any rows because you're looking for 'age of empires III' exact string which doesn't exists in any rows.
So in order to match with this string with different string which has 'age of empires'
as substring you need to use '%your string goes here%'
More on mysql string comparision
You need to try this
SELECT * from games WHERE (lower(title) LIKE '%age of empires III%');
In Like '%age of empires III%'
this will search for any matching substring in your rows, and it will show in results.
Try passing width=200
as additional paramater when creating the Label.
This should work in creating label with specified width.
If you want to change it later, you can use:
label.config(width=200)
As you want to change the size of font itself you can try:
label.config(font=("Courier", 44))
Carriage return is "\r"
. Mind the double quotes!
I think you want "\r\n"
btw to put a line break in your text so it will be rendered correctly in different operating systems.
Try asmcrypto.js — it's really fast.
PS: I'm an author and I can answer your questions if any. Also I'd be glad to get some feedback :)
You need to escape the backslash \
:
println yourString.replace("\\", "/")
Use pandas.Series.dt.day_name()
, since pandas.Timestamp.weekday_name
has been deprecated:
import pandas as pd
df = pd.DataFrame({'my_dates':['2015-01-01','2015-01-02','2015-01-03'],'myvals':[1,2,3]})
df['my_dates'] = pd.to_datetime(df['my_dates'])
df['day_of_week'] = df['my_dates'].dt.day_name()
Output:
my_dates myvals day_of_week
0 2015-01-01 1 Thursday
1 2015-01-02 2 Friday
2 2015-01-03 3 Saturday
As user jezrael points out below, dt.weekday_name
was added in version 0.18.1
Pandas Docs
import pandas as pd
df = pd.DataFrame({'my_dates':['2015-01-01','2015-01-02','2015-01-03'],'myvals':[1,2,3]})
df['my_dates'] = pd.to_datetime(df['my_dates'])
df['day_of_week'] = df['my_dates'].dt.weekday_name
Output:
my_dates myvals day_of_week
0 2015-01-01 1 Thursday
1 2015-01-02 2 Friday
2 2015-01-03 3 Saturday
Use this:
http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.dt.dayofweek.html
See this:
Get weekday/day-of-week for Datetime column of DataFrame
If you want a string instead of an integer do something like this:
import pandas as pd
df = pd.DataFrame({'my_dates':['2015-01-01','2015-01-02','2015-01-03'],'myvals':[1,2,3]})
df['my_dates'] = pd.to_datetime(df['my_dates'])
df['day_of_week'] = df['my_dates'].dt.dayofweek
days = {0:'Mon',1:'Tues',2:'Weds',3:'Thurs',4:'Fri',5:'Sat',6:'Sun'}
df['day_of_week'] = df['day_of_week'].apply(lambda x: days[x])
Output:
my_dates myvals day_of_week
0 2015-01-01 1 Thurs
1 2015-01-02 2 Fri
2 2015-01-01 3 Thurs
I don't know if this is still the recommended thing to use but the "Object Linking and Embedding" framework allows you to embed certain objects/controls directly into your application. This will probably only work for certain applications, I'm not sure if Notepad is one of them. For really simple things like notepad, you'll probably have an easier time just working with the text box controls provided by whatever medium you're using (e.g. WinForms).
Here's a link to OLE info to get started: