Yes, they are very different in theory, and in implementation.
Lexers are used to recognize "words" that make up language elements, because the structure of such words is generally simple. Regular expressions are extremely good at handling this simpler structure, and there are very high-performance regular-expression matching engines used to implement lexers.
Parsers are used to recognize "structure" of a language phrases. Such structure is generally far beyond what "regular expressions" can recognize, so one needs "context sensitive" parsers to extract such structure. Context-sensitive parsers are hard to build, so the engineering compromise is to use "context-free" grammars and add hacks to the parsers ("symbol tables", etc.) to handle the context-sensitive part.
Neither lexing nor parsing technology is likely to go away soon.
They may be unified by deciding to use "parsing" technology to recognize "words", as is currently explored by so-called scannerless GLR parsers. That has a runtime cost, as you are applying more general machinery to what is often a problem that doesn't need it, and usually you pay for that in overhead. Where you have lots of free cycles, that overhead may not matter. If you process a lot of text, then the overhead does matter and classical regular expression parsers will continue to be used.
and this is the php file to receive the uplaoded files
<?
$data = array();
//check with your logic
if (isset($_FILES)) {
$error = false;
$files = array();
$uploaddir = $target_dir;
foreach ($_FILES as $file) {
if (move_uploaded_file($file['tmp_name'], $uploaddir . basename( $file['name']))) {
$files[] = $uploaddir . $file['name'];
} else {
$error = true;
}
}
$data = ($error) ? array('error' => 'There was an error uploading your files') : array('files' => $files);
} else {
$data = array('success' => 'NO FILES ARE SENT','formData' => $_REQUEST);
}
echo json_encode($data);
?>
Use filectime. For Windows it will return the creation time, and for Unix the change time which is the best you can get because on Unix there is no creation time (in most filesystems).
Note also that in some Unix texts the ctime of a file is referred to as being the creation time of the file. This is wrong. There is no creation time for Unix files in most Unix filesystems.
There are several ways to reload the current page using a button or other trigger. The examples below use a button click to reload the page but you can use a text hyperlink or any trigger you like.
<input type="button" value="Reload Page" onClick="window.location.reload()">
<input type="button" value="Reload Page" onClick="history.go(0)">
<input type="button" value="Reload Page" onClick="window.location.href=window.location.href">
First, I think you're calling it the wrong thing. "JSON" stands for "JavaScript Object Notation" - it's just a specification for representing some data in a string that explicitly mimics JavaScript object (and array, string, number and boolean) literals. You're trying to build up a JavaScript object dynamically - so the word you're looking for is "object".
With that pedantry out of the way, I think that you're asking how to set object and array properties.
// make an empty object
var myObject = {};
// set the "list1" property to an array of strings
myObject.list1 = ['1', '2'];
// you can also access properties by string
myObject['list2'] = [];
// accessing arrays is the same, but the keys are numbers
myObject.list2[0] = 'a';
myObject['list2'][1] = 'b';
myObject.list3 = [];
// instead of placing properties at specific indices, you
// can push them on to the end
myObject.list3.push({});
// or unshift them on to the beginning
myObject.list3.unshift({});
myObject.list3[0]['key1'] = 'value1';
myObject.list3[1]['key2'] = 'value2';
myObject.not_a_list = '11';
That code will build up the object that you specified in your question (except that I call it myObject instead of myJSON). For more information on accessing properties, I recommend the Mozilla JavaScript Guide and the book JavaScript: The Good Parts.
An easy solution to center text horizontally and vertically in SVG:
Set the position of the text to the absolute center of the element in which you want to center it:
x="50%" y ="50%"
.x
would be the x
of that element + half its width (and similar for y
but with the height).Use the text-anchor
property to center the text horizontally with the value middle
:
middle
The rendered characters are aligned such that the geometric middle of the resulting rendered text is at the initial current text position.
Use the dominant-baseline
property to center the text vertically with the value middle
(or depending on how you want it to look like, you may want to do central
)
Here is a simple demo:
<svg width="200" height="100">_x000D_
<rect x="0" y="0" width="200" height="100" stroke="red" stroke-width="3px" fill="white"/>_x000D_
<text x="50%" y="50%" dominant-baseline="middle" text-anchor="middle">TEXT</text> _x000D_
</svg>
_x000D_
The best way I've found is:
<script type="text/javascript">
$(document).ready(function() {
$.fancybox(
$("#WRAPPER_FOR_hidden_div_with_content_to_show").html(), //fancybox works perfect with hidden divs
{
//fancybox options
}
);
});
</script>
To complement the previous stated solution, use:
str = str.replace("%", "%%");
You need to find what your local network's IP of that computer is. Then other people can access to your site by that IP.
You can find your local network's IP by go to Command Prompt or press Windows + R then type in ipconfig
. It will give out some information and your local IP should look like 192.168.1.x.
On Build Settings
search VALID_ARCH
then press delete
.
This should work for me with Xcode 12.0.1
On newer versions of Windows (Windows 10 and Windows Server 2016) the tasks you create are located in C:\Windows\Tasks
. They will have the extension .job
For example if you create the task "DoWork" it will create the task in
C:\Windows\Tasks\DoWork.job
Much of the code we write in front-end JavaScript is event-based — we define some behavior, then attach it to an event that is triggered by the user (such as a click or a keypress). Our code is generally attached as a callback: a single function which is executed in response to the event. size12, size14, and size16 are now functions which will resize the body text to 12, 14, and 16 pixels, respectively. We can attach them to buttons (in this case links) as follows:
function makeSizer(size) {
return function() {
document.body.style.fontSize = size + 'px';
};
}
var size12 = makeSizer(12);
var size14 = makeSizer(14);
var size16 = makeSizer(16);
document.getElementById('size-12').onclick = size12;
document.getElementById('size-14').onclick = size14;
document.getElementById('size-16').onclick = size16;
As a rule of thumb, the safest bet towards making your document be treated properly by all web servers, proxies, and client browsers, is probably the following:
In terms of the RFC 3023 spec, which some browsers fail to implement properly, the major difference in the content types is in how clients are supposed to treat the character encoding, as follows:
For application/xml, application/xml-dtd, application/xml-external-parsed-entity, or any one of the subtypes of application/xml such as application/atom+xml, application/rss+xml or application/rdf+xml, the character encoding is determined in this order:
For text/xml, text/xml-external-parsed-entity, or a subtype like text/foo+xml, the encoding attribute of the XML declaration within the document is ignored, and the character encoding is:
Most parsers don't implement the spec; they ignore the HTTP Context-Type and just use the encoding in the document. With so many ill-formed documents out there, that's unlikely to change any time soon.
You don't create subfolders of the drawable folder but rather 'sibling' folders next to it under the /res
folder for the different screen densities or screen sizes.
The /drawable
folder (without any dimension) is mostly used for drawables that don't relate to any screen sizes like selector
s.
See this screenshot (use the name drawable-hdpi
instead of mipmap-hdpi
):
Look at the following commands (especially the commented block).
DROP TABLE foo;
DROP TABLE bar;
CREATE TABLE foo (a int, b text);
CREATE TABLE bar (a serial, b text);
INSERT INTO foo (a, b) SELECT i, 'foo ' || i::text FROM generate_series(1, 5) i;
INSERT INTO bar (b) SELECT 'bar ' || i::text FROM generate_series(1, 5) i;
-- blocks of commands to turn foo into bar
CREATE SEQUENCE foo_a_seq;
ALTER TABLE foo ALTER COLUMN a SET DEFAULT nextval('foo_a_seq');
ALTER TABLE foo ALTER COLUMN a SET NOT NULL;
ALTER SEQUENCE foo_a_seq OWNED BY foo.a; -- 8.2 or later
SELECT MAX(a) FROM foo;
SELECT setval('foo_a_seq', 5); -- replace 5 by SELECT MAX result
INSERT INTO foo (b) VALUES('teste');
INSERT INTO bar (b) VALUES('teste');
SELECT * FROM foo;
SELECT * FROM bar;
This error could also be because you are not subscribing to the Observable.
Example, instead of:
this.products = this.productService.getProducts();
do this:
this.productService.getProducts().subscribe({
next: products=>this.products = products,
error: err=>this.errorMessage = err
});
In addition to return an exit code to parent process -
In UNIX, an important aspect that I think has been left out is, that exit() at first calls (in reverse order) all those functions, which were registered by atexit() call.
Please refer to SUSv4 for details.
In short, a Service is a broader implementation for the developer to set up background operations, while an IntentService is useful for "fire and forget" operations, taking care of background Thread creation and cleanup.
From the docs:
Service A Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other applications to use.
IntentService
Service is a base class for IntentService Services that handle asynchronous requests (expressed as Intents) on demand. Clients send requests through startService(Intent)
calls; the service is started as needed, handles each Intent in turn using a worker thread, and stops itself when it runs out of work.
Refer this doc - http://developer.android.com/reference/android/app/IntentService.html
The key is to encapsulate the expression in parentheses after the @ delimiter. You can make any compound expression work this way.
C:\xampp\mysql\bin\mysql -u root -p testdatabase < C:\Users\Juan\Desktop\databasebackup.sql
That worked for me to import 400MB file into my database.
You can fix this issue by deleting browser cookie from the begining of time. I have tried this and it is working fine for me.
To delete only cookies:
After hours of searching and looking for answer, finally I made it!!!!! Code is below :))))
HTML:
<form id="fileinfo" enctype="multipart/form-data" method="post" name="fileinfo">
<label>File to stash:</label>
<input type="file" name="file" required />
</form>
<input type="button" value="Stash the file!"></input>
<div id="output"></div>
jQuery:
$(function(){
$('#uploadBTN').on('click', function(){
var fd = new FormData($("#fileinfo"));
//fd.append("CustomField", "This is some extra data");
$.ajax({
url: 'upload.php',
type: 'POST',
data: fd,
success:function(data){
$('#output').html(data);
},
cache: false,
contentType: false,
processData: false
});
});
});
In the upload.php
file you can access the data passed with $_FILES['file']
.
Thanks everyone for trying to help:)
I took the answer from here (with some changes) MDN
Try:
new java.text.DecimalFormat("0").format( cell.getNumericCellValue() )
Should format the number correctly.
You can create a StreamReader
around the stream, then call StreamReader.ReadToEnd()
.
StreamReader responseReader = new StreamReader(request.GetResponse().GetResponseStream());
var responseData = responseReader.ReadToEnd();
My problem was solved by uhlocking the screen rotation on my android the app which was causing me a problem now works perfectly
If your pdf is text-based and not a scanned document (i.e. if you can click and drag to select text in your table in a PDF viewer), then you can use the module camelot-py
with
import camelot
tables = camelot.read_pdf('foo.pdf')
You then can choose how you want to save the tables (as csv, json, excel, html, sqlite), and whether the output should be compressed in a ZIP archive.
tables.export('foo.csv', f='csv', compress=False)
Edit: tabula-py
appears roughly 6 times faster than camelot-py
so that should be used instead.
import camelot
import cProfile
import pstats
import tabula
cmd_tabula = "tabula.read_pdf('table.pdf', pages='1', lattice=True)"
prof_tabula = cProfile.Profile().run(cmd_tabula)
time_tabula = pstats.Stats(prof_tabula).total_tt
cmd_camelot = "camelot.read_pdf('table.pdf', pages='1', flavor='lattice')"
prof_camelot = cProfile.Profile().run(cmd_camelot)
time_camelot = pstats.Stats(prof_camelot).total_tt
print(time_tabula, time_camelot, time_camelot/time_tabula)
gave
1.8495559890000015 11.057014036000016 5.978199147125147
This code
var title = news.title;
var link = news.link;
arr.push({title : link});
is not doing what you think it does. What gets pushed is a new object with a single member named "title" and with link
as the value ... the actual title
value is not used.
To save an object with two fields you have to do something like
arr.push({title:title, link:link});
or with recent Javascript advances you can use the shortcut
arr.push({title, link}); // Note: comma "," and not colon ":"
If instead you want the key of the object to be the content of the variable title
you can use
arr.push({[title]: link}); // Note that title has been wrapped in brackets
Wikipedia has a great example of Facade pattern.
/* Complex parts */
class CPU {
public void freeze() { ... }
public void jump(long position) { ... }
public void execute() { ... }
}
class Memory {
public void load(long position, byte[] data) { ... }
}
class HardDrive {
public byte[] read(long lba, int size) { ... }
}
/* Facade */
class ComputerFacade {
private CPU processor;
private Memory ram;
private HardDrive hd;
public ComputerFacade() {
this.processor = new CPU();
this.ram = new Memory();
this.hd = new HardDrive();
}
public void start() {
processor.freeze();
ram.load(BOOT_ADDRESS, hd.read(BOOT_SECTOR, SECTOR_SIZE));
processor.jump(BOOT_ADDRESS);
processor.execute();
}
}
/* Client */
class You {
public static void main(String[] args) {
ComputerFacade computer = new ComputerFacade();
computer.start();
}
}
Iterate string:
for ($i = 0; $i < strlen($str); $i++){
echo $str[$i];
}
If we want to copy an object in Java, there are two possibilities that we need to consider: a shallow copy and a deep copy.
The shallow copy is the approach when we only copy field values. Therefore, the copy might be dependent on the original object. In the deep copy approach, we make sure that all the objects in the tree are deeply copied, so the copy is not dependent on any earlier existing object that might ever change.
This question is the perfect definition for the application of the deep copy approach.
First, if you have a simple HashMap<Integer, List<T>>
map then we just create a workaround like this. Creating a new instance of the List<T>
.
public static <T> HashMap<Integer, List<T>> deepCopyWorkAround(HashMap<Integer, List<T>> original)
{
HashMap<Integer, List<T>> copy = new HashMap<>();
for (Map.Entry<Integer, List<T>> entry : original.entrySet()) {
copy.put(entry.getKey(), new ArrayList<>(entry.getValue()));
}
return copy;
}
This one uses Stream.collect()
method to create the clone map, but uses the same idea as the previous method.
public static <T> Map<Integer, List<T>> deepCopyStreamWorkAround(Map<Integer, List<T>> original)
{
return original
.entrySet()
.stream()
.collect(Collectors.toMap(Map.Entry::getKey, valueMapper -> new ArrayList<>(valueMapper.getValue())));
}
But, if the instances inside T
are also mutable objects we have a big problem. In this case a real deep copy is an alternative that solves this problem. Its advantage is that at least each mutable object in the object graph is recursively copied. Since the copy is not dependent on any mutable object that was created earlier, it won’t get modified by accident like we saw with the shallow copy.
To solve that this deep copy implementations will do the work.
public class DeepClone
{
public static void main(String[] args)
{
Map<Long, Item> itemMap = Stream.of(
entry(0L, new Item(2558584)),
entry(1L, new Item(254243232)),
entry(2L, new Item(986786)),
entry(3L, new Item(672542)),
entry(4L, new Item(4846)),
entry(5L, new Item(76867467)),
entry(6L, new Item(986786)),
entry(7L, new Item(7969768)),
entry(8L, new Item(68868486)),
entry(9L, new Item(923)),
entry(10L, new Item(986786)),
entry(11L, new Item(549768)),
entry(12L, new Item(796168)),
entry(13L, new Item(868421)),
entry(14L, new Item(923)),
entry(15L, new Item(986786)),
entry(16L, new Item(549768)),
entry(17L, new Item(4846)),
entry(18L, new Item(4846)),
entry(19L, new Item(76867467)),
entry(20L, new Item(986786)),
entry(21L, new Item(7969768)),
entry(22L, new Item(923)),
entry(23L, new Item(4846)),
entry(24L, new Item(986786)),
entry(25L, new Item(549768))
).collect(entriesToMap());
Map<Long, Item> clone = DeepClone.deepClone(itemMap);
clone.remove(1L);
clone.remove(2L);
System.out.println(itemMap);
System.out.println(clone);
}
private DeepClone() {}
public static <T> T deepClone(final T input)
{
if (input == null) return null;
if (input instanceof Map<?, ?>) {
return (T) deepCloneMap((Map<?, ?>) input);
} else if (input instanceof Collection<?>) {
return (T) deepCloneCollection((Collection<?>) input);
} else if (input instanceof Object[]) {
return (T) deepCloneObjectArray((Object[]) input);
} else if (input.getClass().isArray()) {
return (T) clonePrimitiveArray((Object) input);
}
return input;
}
private static Object clonePrimitiveArray(final Object input)
{
final int length = Array.getLength(input);
final Object output = Array.newInstance(input.getClass().getComponentType(), length);
System.arraycopy(input, 0, output, 0, length);
return output;
}
private static <E> E[] deepCloneObjectArray(final E[] input)
{
final E[] clone = (E[]) Array.newInstance(input.getClass().getComponentType(), input.length);
for (int i = 0; i < input.length; i++) {
clone[i] = deepClone(input[i]);
}
return clone;
}
private static <E> Collection<E> deepCloneCollection(final Collection<E> input)
{
Collection<E> clone;
if (input instanceof LinkedList<?>) {
clone = new LinkedList<>();
} else if (input instanceof SortedSet<?>) {
clone = new TreeSet<>();
} else if (input instanceof Set) {
clone = new HashSet<>();
} else {
clone = new ArrayList<>();
}
for (E item : input) {
clone.add(deepClone(item));
}
return clone;
}
private static <K, V> Map<K, V> deepCloneMap(final Map<K, V> map)
{
Map<K, V> clone;
if (map instanceof LinkedHashMap<?, ?>) {
clone = new LinkedHashMap<>();
} else if (map instanceof TreeMap<?, ?>) {
clone = new TreeMap<>();
} else {
clone = new HashMap<>();
}
for (Map.Entry<K, V> entry : map.entrySet()) {
clone.put(deepClone(entry.getKey()), deepClone(entry.getValue()));
}
return clone;
}
}
Assembly.LoadFile(@"C:\Windows\Microsoft.NET\Framework\v4.0.30319\system.data.dll").FullName
Will result in
System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
I was trying this:
After giving the file read, write, execute priviledges:
chmod 777 java-repl.jar
alias jr="java -jar $HOME/Dev/java-repl/java-repl.jar"
Unable to access bla bla..., this was on Mac OS though
So I tried this:
alias jr="cd $HOME/Dev/java-repl/ && java -jar java-repl.jar"
just uncheck the 'Sign the click once manifests' from the signing tab in project properties,it will remove the error and you can create a new one as from there.
Steps to start Apache Tomcat using cmd:
1. Firstly check that the JRE_HOME or JAVA_HOME is a variable available in environment variables.(If it is not create a new variable JRE_HOME or JAVA_HOME)
2. Goto cmd and change your working directory to bin path where apache is installed (or extracted).
3. Type Command -> catalina.bat start
to start the server.
4. Type Command -> catalina.bat stop
to stop the server.
Maybe these two examples illustrate you the difference between a deadlock and a livelock:
Java-Example for a deadlock:
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class DeadlockSample {
private static final Lock lock1 = new ReentrantLock(true);
private static final Lock lock2 = new ReentrantLock(true);
public static void main(String[] args) {
Thread threadA = new Thread(DeadlockSample::doA,"Thread A");
Thread threadB = new Thread(DeadlockSample::doB,"Thread B");
threadA.start();
threadB.start();
}
public static void doA() {
System.out.println(Thread.currentThread().getName() + " : waits for lock 1");
lock1.lock();
System.out.println(Thread.currentThread().getName() + " : holds lock 1");
try {
System.out.println(Thread.currentThread().getName() + " : waits for lock 2");
lock2.lock();
System.out.println(Thread.currentThread().getName() + " : holds lock 2");
try {
System.out.println(Thread.currentThread().getName() + " : critical section of doA()");
} finally {
lock2.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 2 any longer");
}
} finally {
lock1.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 1 any longer");
}
}
public static void doB() {
System.out.println(Thread.currentThread().getName() + " : waits for lock 2");
lock2.lock();
System.out.println(Thread.currentThread().getName() + " : holds lock 2");
try {
System.out.println(Thread.currentThread().getName() + " : waits for lock 1");
lock1.lock();
System.out.println(Thread.currentThread().getName() + " : holds lock 1");
try {
System.out.println(Thread.currentThread().getName() + " : critical section of doB()");
} finally {
lock1.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 1 any longer");
}
} finally {
lock2.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 2 any longer");
}
}
}
Sample output:
Thread A : waits for lock 1
Thread B : waits for lock 2
Thread A : holds lock 1
Thread B : holds lock 2
Thread B : waits for lock 1
Thread A : waits for lock 2
Java-Example for a livelock:
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class LivelockSample {
private static final Lock lock1 = new ReentrantLock(true);
private static final Lock lock2 = new ReentrantLock(true);
public static void main(String[] args) {
Thread threadA = new Thread(LivelockSample::doA, "Thread A");
Thread threadB = new Thread(LivelockSample::doB, "Thread B");
threadA.start();
threadB.start();
}
public static void doA() {
try {
while (!lock1.tryLock()) {
System.out.println(Thread.currentThread().getName() + " : waits for lock 1");
Thread.sleep(100);
}
System.out.println(Thread.currentThread().getName() + " : holds lock 1");
try {
while (!lock2.tryLock()) {
System.out.println(Thread.currentThread().getName() + " : waits for lock 2");
Thread.sleep(100);
}
System.out.println(Thread.currentThread().getName() + " : holds lock 2");
try {
System.out.println(Thread.currentThread().getName() + " : critical section of doA()");
} finally {
lock2.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 2 any longer");
}
} finally {
lock1.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 1 any longer");
}
} catch (InterruptedException e) {
// can be ignored here for this sample
}
}
public static void doB() {
try {
while (!lock2.tryLock()) {
System.out.println(Thread.currentThread().getName() + " : waits for lock 2");
Thread.sleep(100);
}
System.out.println(Thread.currentThread().getName() + " : holds lock 2");
try {
while (!lock1.tryLock()) {
System.out.println(Thread.currentThread().getName() + " : waits for lock 1");
Thread.sleep(100);
}
System.out.println(Thread.currentThread().getName() + " : holds lock 1");
try {
System.out.println(Thread.currentThread().getName() + " : critical section of doB()");
} finally {
lock1.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 1 any longer");
}
} finally {
lock2.unlock();
System.out.println(Thread.currentThread().getName() + " : does not hold lock 2 any longer");
}
} catch (InterruptedException e) {
// can be ignored here for this sample
}
}
}
Sample output:
Thread B : holds lock 2
Thread A : holds lock 1
Thread A : waits for lock 2
Thread B : waits for lock 1
Thread B : waits for lock 1
Thread A : waits for lock 2
Thread A : waits for lock 2
Thread B : waits for lock 1
Thread B : waits for lock 1
Thread A : waits for lock 2
Thread A : waits for lock 2
Thread B : waits for lock 1
...
Both examples force the threads to aquire the locks in different orders. While the deadlock waits for the other lock, the livelock does not really wait - it desperately tries to acquire the lock without the chance of getting it. Every try consumes CPU cycles.
There are two ways to do the same instruction, that is, an empty string. The first way is to allocate an empty string on static memory:
char* my_variable = "";
or, if you want to be explicit:
char my_variable = '\0';
The way posted above is only for a character. And, the second way:
#include <string.h>
char* my_variable = strdup("");
Don't forget to use free() with this one because strdup() use malloc inside.
Any time you get the...
"Fatal error: Call to a member function bind_param() on boolean"
...it is likely because there is an issue with your query. The prepare()
might return FALSE
(a Boolean), but this generic failure message doesn't leave you much in the way of clues. How do you find out what is wrong with your query? You ask!
First of all, make sure error reporting is turned on and visible: add these two lines to the top of your file(s) right after your opening <?php
tag:
error_reporting(E_ALL);
ini_set('display_errors', 1);
If your error reporting has been set in the php.ini you won't have to worry about this. Just make sure you handle errors gracefully and never reveal the true cause of any issues to your users. Revealing the true cause to the public can be a gold engraved invitation for those wanting to harm your sites and servers. If you do not want to send errors to the browser you can always monitor your web server error logs. Log locations will vary from server to server e.g., on Ubuntu the error log is typically located at /var/log/apache2/error.log
. If you're examining error logs in a Linux environment you can use tail -f /path/to/log
in a console window to see errors as they occur in real-time....or as you make them.
Once you're squared away on standard error reporting adding error checking on your database connection and queries will give you much more detail about the problems going on. Have a look at this example where the column name is incorrect. First, the code which returns the generic fatal error message:
$sql = "SELECT `foo` FROM `weird_words` WHERE `definition` = ?";
$query = $mysqli->prepare($sql)); // assuming $mysqli is the connection
$query->bind_param('s', $definition);
$query->execute();
The error is generic and not very helpful to you in solving what is going on.
With a couple of more lines of code you can get very detailed information which you can use to solve the issue immediately. Check the prepare()
statement for truthiness and if it is good you can proceed on to binding and executing.
$sql = "SELECT `foo` FROM `weird_words` WHERE `definition` = ?";
if($query = $mysqli->prepare($sql)) { // assuming $mysqli is the connection
$query->bind_param('s', $definition);
$query->execute();
// any additional code you need would go here.
} else {
$error = $mysqli->errno . ' ' . $mysqli->error;
echo $error; // 1054 Unknown column 'foo' in 'field list'
}
If something is wrong you can spit out an error message which takes you directly to the issue. In this case there is no foo
column in the table, solving the problem is trivial.
If you choose, you can include this checking in a function or class and extend it by handling the errors gracefully as mentioned previously.
You could use:
declare @foo as nvarchar(25)
select @foo = 'bar'
select @foo
Adapt this example to your code
HTML
<div class="img-holder">
<img src="images/img-1.png" alt="image description"/>
<a class="link" href=""></a>
</div>
CSS
.img-holder {position: relative;}
.img-holder .link {
position: absolute;
bottom: 10px; /*your button position*/
right: 10px; /*your button position*/
}
Printing the exception's stack trace in itself doesn't constitute bad practice, but only printing the stace trace when an exception occurs is probably the issue here -- often times, just printing a stack trace is not enough.
Also, there's a tendency to suspect that proper exception handling is not being performed if all that is being performed in a catch
block is a e.printStackTrace
. Improper handling could mean at best an problem is being ignored, and at worst a program that continues executing in an undefined or unexpected state.
Example
Let's consider the following example:
try {
initializeState();
} catch (TheSkyIsFallingEndOfTheWorldException e) {
e.printStackTrace();
}
continueProcessingAssumingThatTheStateIsCorrect();
Here, we want to do some initialization processing before we continue on to some processing that requires that the initialization had taken place.
In the above code, the exception should have been caught and properly handled to prevent the program from proceeding to the continueProcessingAssumingThatTheStateIsCorrect
method which we could assume would cause problems.
In many instances, e.printStackTrace()
is an indication that some exception is being swallowed and processing is allowed to proceed as if no problem every occurred.
Why has this become a problem?
Probably one of the biggest reason that poor exception handling has become more prevalent is due to how IDEs such as Eclipse will auto-generate code that will perform a e.printStackTrace
for the exception handling:
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
(The above is an actual try-catch
auto-generated by Eclipse to handle an InterruptedException
thrown by Thread.sleep
.)
For most applications, just printing the stack trace to standard error is probably not going to be sufficient. Improper exception handling could in many instances lead to an application running in a state that is unexpected and could be leading to unexpected and undefined behavior.
if you are talking about in the reference of String Class. so you can use
subString/split
for Explode & use String
concate
for Implode.
There is this extensions that adds an event listener to attribute changes.
Usage:
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript"
src="https://cdn.rawgit.com/meetselva/attrchange/master/js/attrchange.js"></script>
Bind attrchange handler function to selected elements
$(selector).attrchange({
trackValues: true, /* Default to false, if set to true the event object is
updated with old and new value.*/
callback: function (event) {
//event - event object
//event.attributeName - Name of the attribute modified
//event.oldValue - Previous value of the modified attribute
//event.newValue - New value of the modified attribute
//Triggered when the selected elements attribute is added/updated/removed
}
});
@Shadow Wizard's code should return 02:45 PM instead of 14:45 PM. So I modified his code a bit:
function getNowDateTimeStr(){
var now = new Date();
var hour = now.getHours() - (now.getHours() >= 12 ? 12 : 0);
return [[AddZero(now.getDate()), AddZero(now.getMonth() + 1), now.getFullYear()].join("/"), [AddZero(hour), AddZero(now.getMinutes())].join(":"), now.getHours() >= 12 ? "PM" : "AM"].join(" ");
}
//Pad given value to the left with "0"
function AddZero(num) {
return (num >= 0 && num < 10) ? "0" + num : num + "";
}
If you have an association on a property pointing to the user (let's say Credit\Entity\UserCreditHistory#user
, picked from your example), then the syntax is quite simple:
public function getHistory($users) {
$qb = $this->entityManager->createQueryBuilder();
$qb
->select('a', 'u')
->from('Credit\Entity\UserCreditHistory', 'a')
->leftJoin('a.user', 'u')
->where('u = :user')
->setParameter('user', $users)
->orderBy('a.created_at', 'DESC');
return $qb->getQuery()->getResult();
}
Since you are applying a condition on the joined result here, using a LEFT JOIN
or simply JOIN
is the same.
If no association is available, then the query looks like following
public function getHistory($users) {
$qb = $this->entityManager->createQueryBuilder();
$qb
->select('a', 'u')
->from('Credit\Entity\UserCreditHistory', 'a')
->leftJoin(
'User\Entity\User',
'u',
\Doctrine\ORM\Query\Expr\Join::WITH,
'a.user = u.id'
)
->where('u = :user')
->setParameter('user', $users)
->orderBy('a.created_at', 'DESC');
return $qb->getQuery()->getResult();
}
This will produce a resultset that looks like following:
array(
array(
0 => UserCreditHistory instance,
1 => Userinstance,
),
array(
0 => UserCreditHistory instance,
1 => Userinstance,
),
// ...
)
Solution:
Instead of using setHeader
method I have used addHeader
.
response.addHeader("Access-Control-Allow-Origin", "*");
*
in above line will allow access to all domains, For allowing access to specific domain only:
response.addHeader("Access-Control-Allow-Origin", "http://www.example.com");
For issues related to IE<=9, Please see here.
the $("body").append(r)
statement should be within the test
function, also there was misplaced "
in the test
method
function test() {
var r=$('<input/>').attr({
type: "button",
id: "field",
value: 'new'
});
$("body").append(r);
}
Demo: Fiddle
Update
In that case try a more jQuery-ish solution
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
jQuery(function($){
$('#mybutton').one('click', function(){
var r=$('<input/>').attr({
type: "button",
id: "field",
value: 'new'
});
$("body").append(r);
})
})
</script>
</head>
<body>
<button id="mybutton">Insert after</button>
</body>
</html>
Demo: Plunker
Have you considered List.BinarySearch(item)
?
You said that your large collection is already sorted so this seems like the perfect opportunity? A hash would definitely be the fastest, but this brings about its own problems and requires a lot more overhead for storage.
In Typescript use the For Each like below.
selectChildren(data, $event) {
let parentChecked = data.checked;
for(var obj in this.hierarchicalData)
{
for (var childObj in obj )
{
value.checked = parentChecked;
}
}
}
Use
#pragma once
at the top of header files, so if they're included more than once in a translation unit, the text of the header will only get included and parsed once.
If you use request.getPathInfo() inside a Filter, you always seem to get null (at least with jetty).
This terse invalid bug + response alludes to the issue I think:
https://issues.apache.org/bugzilla/show_bug.cgi?id=28323
I suspect it is related to the fact that filters run before the servlet gets the request. It may be a container bug, or expected behaviour that I haven't been able to identify.
The contextPath is available though, so fforws solution works even in filters. I don't like having to do it by hand, but the implementation is broken or
I updated answer of Morteza Ziaeemehr to a cleaner and better code, This will unzip a file provided within form into current directory using DIR.
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' >
<title>Unzip</title>
<style>
body{
font-family: arial, sans-serif;
word-wrap: break-word;
}
.wrapper{
padding:20px;
line-height: 1.5;
font-size: 1rem;
}
span{
font-family: 'Consolas', 'courier new', monospace;
background: #eee;
padding:2px;
}
</style>
</head>
<body>
<div class="wrapper">
<?php
if(isset($_GET['page']))
{
$type = $_GET['page'];
global $con;
switch($type)
{
case 'unzip':
{
$zip_filename =$_POST['filename'];
echo "Unzipping <span>" .__DIR__. "/" .$zip_filename. "</span> to <span>" .__DIR__. "</span><br>";
echo "current dir: <span>" . __DIR__ . "</span><br>";
$zip = new ZipArchive;
$res = $zip->open(__DIR__ . '/' .$zip_filename);
if ($res === TRUE)
{
$zip->extractTo(__DIR__);
$zip->close();
echo '<p style="color:#00C324;">Extract was successful! Enjoy ;)</p><br>';
}
else
{
echo '<p style="color:red;">Zip file not found!</p><br>';
}
break;
}
}
}
?>
End Script.
</div>
<form name="unzip" id="unzip" role="form">
<div class="body bg-gray">
<div class="form-group">
<input type="text" name="filename" class="form-control" placeholder="File Name (with extension)"/>
</div>
</div>
</form>
<script type="application/javascript">
$("#unzip").submit(function(event) {
event.preventDefault();
var url = "function.php?page=unzip"; // the script where you handle the form input.
$.ajax({
type: "POST",
url: url,
dataType:"json",
data: $("#unzip").serialize(), // serializes the form's elements.
success: function(data)
{
alert(data.msg); // show response from the php script.
document.getElementById("unzip").reset();
}
});
return false; // avoid to execute the actual submit of the form
});
</script>
</body>
</html>
I meet the problem in windows7, phpeclipse, when I start the XAMPP. My solution is :
1.Commented out the \xampp\apache\conf\httpd.conf -> line171 -> #LoadModule ssl_module modules/mod_ssl.so
2.line539 -> #Include conf/extra/httpd-ssl.conf
or you can change the 443 port to another one
I was using restify instead of express and ran into the same problem. The solution was to do:
server.use(restify.bodyParser());
Here's an example where I change the background image from one to another with a 2 second alpha fade delay both ways - 2s fadeout of the original image into a 2s fadein into the 2nd image.
public void fadeImageFunction(View view) {
backgroundImage = (ImageView) findViewById(R.id.imageViewBackground);
backgroundImage.animate().alpha(0f).setDuration(2000);
// A new thread with a 2-second delay before changing the background image
new Timer().schedule(
new TimerTask(){
@Override
public void run(){
// you cannot touch the UI from another thread. This thread now calls a function on the main thread
changeBackgroundImage();
}
}, 2000);
}
// this function runs on the main ui thread
private void changeBackgroundImage(){
runOnUiThread(new Runnable() {
@Override
public void run() {
backgroundImage = (ImageView) findViewById(R.id.imageViewBackground);
backgroundImage.setImageResource(R.drawable.supes);
backgroundImage.animate().alpha(1f).setDuration(2000);
}
});
}
I had a similar issue, which was a result of the hard drive being filled up. Turns out the issue was with the cdr table being corrupted and running repair in mysql remedied the issue.
This will scroll to the very top:
$(window).animate({scrollTop: 0});
This will scroll to the very bottom:
$(window).animate({scrollTop: $(document).height() + $(window).height()});
.. change window to your desired container id or class if necessary (in quotes).
If you don't want to go to bin
folder of MySQL then another option is to put a shortcut of mysql.exe
to your default path of command prompt (C:\Users\"your user name">
) with the contents of:
mysql -u(username) -p(password)
You can use the addMethod()
e.g
$.validator.addMethod('postalCode', function (value) {
return /^((\d{5}-\d{4})|(\d{5})|([A-Z]\d[A-Z]\s\d[A-Z]\d))$/.test(value);
}, 'Please enter a valid US or Canadian postal code.');
good article here https://web.archive.org/web/20130609222116/http://www.randallmorey.com/blog/2008/mar/16/extending-jquery-form-validation-plugin/
To do it with an effect like with $.fadeIn() and $.fadeOut() you can use transitions
.visible {
visibility: visible;
opacity: 1;
transition: opacity 1s linear;
}
.hidden {
visibility: hidden;
opacity: 0;
transition: visibility 0s 1s, opacity 1s linear;
}
As mentioned in other answers, by default div
will be rendered as a block element, while span
will be rendered inline within its context. But neither has any semantic value; they exist to allow you to apply styling and an identity to any given bit of content. Using styles, you can make a div
act like a span
and vice-versa.
One of the useful styles for div
is inline-block
Examples:
I have used inline-block
to a great success, in game web projects.
To add the contents of one list to another list which already exists, you can use:
targetList.AddRange(sourceList);
If you're just wanting to create a new copy of the list, see Lasse's answer.
Use DecimalFormat
double answer = 5.0;
DecimalFormat df = new DecimalFormat("###.#");
System.out.println(df.format(answer));
The accepted answer is perfect, except it does not record outgoing calls. Note that for outgoing calls it is not possible (as near as I can tell from scouring many posts) to detect when the call is actually answered (if anybody can find a way other than scouring notifications or logs please let me know). The easiest solution is to just start recording straight away when the outgoing call is placed and stop recording when IDLE is detected. Just adding the same class as above with outgoing recording in this manner for completeness:
private void startRecord(String seed) {
String out = new SimpleDateFormat("dd-MM-yyyy hh-mm-ss").format(new Date());
File sampleDir = new File(Environment.getExternalStorageDirectory(), "/TestRecordingDasa1");
if (!sampleDir.exists()) {
sampleDir.mkdirs();
}
String file_name = "Record" + seed;
try {
audiofile = File.createTempFile(file_name, ".amr", sampleDir);
} catch (IOException e) {
e.printStackTrace();
}
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION);
recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(audiofile.getAbsolutePath());
try {
recorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
recorder.start();
recordstarted = true;
}
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(ACTION_IN)) {
if ((bundle = intent.getExtras()) != null) {
state = bundle.getString(TelephonyManager.EXTRA_STATE);
if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
inCall = bundle.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
wasRinging = true;
Toast.makeText(context, "IN : " + inCall, Toast.LENGTH_LONG).show();
} else if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) {
if (wasRinging == true) {
Toast.makeText(context, "ANSWERED", Toast.LENGTH_LONG).show();
startRecord("incoming");
}
} else if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
wasRinging = false;
Toast.makeText(context, "REJECT || DISCO", Toast.LENGTH_LONG).show();
if (recordstarted) {
recorder.stop();
recordstarted = false;
}
}
}
} else if (intent.getAction().equals(ACTION_OUT)) {
if ((bundle = intent.getExtras()) != null) {
outCall = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Toast.makeText(context, "OUT : " + outCall, Toast.LENGTH_LONG).show();
startRecord("outgoing");
if ((bundle = intent.getExtras()) != null) {
state = bundle.getString(TelephonyManager.EXTRA_STATE);
if (state != null) {
if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
wasRinging = false;
Toast.makeText(context, "REJECT || DISCO", Toast.LENGTH_LONG).show();
if (recordstarted) {
recorder.stop();
recordstarted = false;
}
}
}
}
}
}
}
Use CURRENT_TIMESTAMP
when you need it, instead OF NOW()
(which is MySQL)
You can use cURL and CRON to run .php files at set times.
Here's an example of what cURL needs to run the .php file:
curl http://localhost/myscript.php
Then setup the CRON job to run the above cURL:
nano -w /var/spool/cron/root
or
crontab -e
Followed by:
01 * * * * /usr/bin/curl http://www.yoursite.com/script.php
For more info about, check out this post: https://www.scalescale.com/tips/nginx/execute-php-scripts-automatically-using-cron-curl/
For more info about cURL: What is cURL in PHP?
For more info about CRON: http://code.tutsplus.com/tutorials/scheduling-tasks-with-cron-jobs--net-8800
Also, if you would like to learn about setting up a CRON job on your hosted server, just inquire with your host provider, and they may have a GUI for setting it up in the c-panel (such as http://godaddy.com, or http://1and1.com/ )
NOTE: Technically I believe you can setup a CRON job to run the .php file directly, but I'm not certain.
Best of luck with the automatic PHP running :-)
One step using Array.reduce() - no jQuery
var items = [{id: 331}, {id: 220}, {id: 872}];
var searchIndexForId = 220;
var index = items.reduce(function(searchIndex, item, index){
if(item.id === searchIndexForId) {
console.log('found!');
searchIndex = index;
}
return searchIndex;
}, null);
will return null
if index was not found.
Strangely I only received this error in 1 of my many repos.
My issue was after installing the new GitHub Desktop for Windows where the previous old GitHub for Win kept keys in ~/.ssh/github_rsa
and ~/.ssh/github_rsa.pub
where as the new GitHub for Win expects it in ~/.ssh/id_rsa
so the solution was just renaming the existing private and public keys:
~/.ssh/github_rsa -> ~/.ssh/id_rsa
~/.ssh/github_rsa.pub -> ~/.ssh/id_rsa.pub
After which let me access the repo again without issue.
While some of the other answers have covered the simple cases using setjmp
and longjmp
, in a real application there's two concerns that really matter.
jmp_buf
will make these not work.jmp_buf
will cause all kinds of pain in this situation.The solution to these is to maintain a thread-local stack of jmp_buf
that get updated as you go. (I think this is what lua uses internally).
So instead of this (from JaredPar's awesome answer)
static jmp_buf s_jumpBuffer;
void Example() {
if (setjmp(s_jumpBuffer)) {
// The longjmp was executed and returned control here
printf("Exception happened\n");
} else {
// Normal code execution starts here
Test();
}
}
void Test() {
// Rough equivalent of `throw`
longjump(s_jumpBuffer, 42);
}
You'd use something like:
#define MAX_EXCEPTION_DEPTH 10;
struct exception_state {
jmp_buf s_jumpBuffer[MAX_EXCEPTION_DEPTH];
int current_depth;
};
int try_point(struct exception_state * state) {
if(current_depth==MAX_EXCEPTION_DEPTH) {
abort();
}
int ok = setjmp(state->jumpBuffer[state->current_depth]);
if(ok) {
state->current_depth++;
} else {
//We've had an exception update the stack.
state->current_depth--;
}
return ok;
}
void throw_exception(struct exception_state * state) {
longjump(state->current_depth-1,1);
}
void catch_point(struct exception_state * state) {
state->current_depth--;
}
void end_try_point(struct exception_state * state) {
state->current_depth--;
}
__thread struct exception_state g_exception_state;
void Example() {
if (try_point(&g_exception_state)) {
catch_point(&g_exception_state);
printf("Exception happened\n");
} else {
// Normal code execution starts here
Test();
end_try_point(&g_exception_state);
}
}
void Test() {
// Rough equivalent of `throw`
throw_exception(g_exception_state);
}
Again a more realistic version of this would include some way to store error information into the exception_state
, better handling of MAX_EXCEPTION_DEPTH
(maybe using realloc to grow the buffer, or something like that).
DISCLAIMER: The above code was written without any testing whatsoever. It is purely so you get an idea of how to structure things. Different systems and different compilers will need to implement the thread local storage differently. The code probably contains both compile errors and logic errors - so while you're free to use it as you choose, TEST it before using it ;)
Check the output on the server environment from which jupyter notebook
was launched if you can. You'll probably find error messages and print()
results.
You can try this code this works fine for me:
NotificationCompat.Builder mBuilder= new NotificationCompat.Builder(this);
Intent i = new Intent(noti.this, Xyz_activtiy.class);
PendingIntent pendingIntent= PendingIntent.getActivity(this,0,i,0);
mBuilder.setAutoCancel(true);
mBuilder.setDefaults(NotificationCompat.DEFAULT_ALL);
mBuilder.setWhen(20000);
mBuilder.setTicker("Ticker");
mBuilder.setContentInfo("Info");
mBuilder.setContentIntent(pendingIntent);
mBuilder.setSmallIcon(R.drawable.home);
mBuilder.setContentTitle("New notification title");
mBuilder.setContentText("Notification text");
mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));
NotificationManager notificationManager= (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(2,mBuilder.build());
I'm just starting to use EC2 myself so not an expert, but Amazon's own documentation says:
we recommend that you use the local instance store for temporary data and, for data requiring a higher level of durability, we recommend using Amazon EBS volumes or backing up the data to Amazon S3.
Emphasis mine.
I do more data analysis than web hosting, so persistence doesn't matter as much to me as it might for a web site. Given the distinction made by Amazon itself, I wouldn't assume that EBS is right for everyone.
I'll try to remember to weigh in again after I've used both.
Can use getElementsByTagName
var x = document.getElementsByTagName("title")[0];
alert(x.innerHTML)
// or
alert(x.textContent)
// or
document.querySelector('title')
Edits as suggested by Paul
var url = location.href;_x000D_
var newurl = url.replace('some-domain.com','another-domain.com';);_x000D_
location.href=newurl;
_x000D_
See this answer https://stackoverflow.com/a/42291014/3901511
After I removed
\usepackage{fontspec}% font selecting commands
\usepackage{xunicode}% unicode character macros
\usepackage{xltxtra} % some fixes/extras
it seems to have worked "correctly".
It may be worth noting that the headers and footers only appear from page 2 onwards. Although I've tried the fix for this given in the fancyhdr documentation, I can't get it to work either.
FYI: MikTeX 2.7 under Vista
I have <a>
inside the <li>
s.
To the <ul>
elements, apply the following CSS:
ul {
margin: 0;
padding: 0;
list-style: none;
}
To the <a>
elements, apply the following CSS:
a:before {
content: "";
height: 6px;
width: 6px;
border-radius: 50%;
background: #000;
display: inline-block;
margin: 0 6px 0 0;
vertical-align: middle;
}
This creates pseudo elements for the bullets. They can be styled just like any other elements.
I've implemented it here: http://www.cssdesk.com/R2AvX
here is my recursive solution.
vector<vector<int> > getSubsets(vector<int> a){
//base case
//if there is just one item then its subsets are that item and empty item
//for example all subsets of {1} are {1}, {}
if(a.size() == 1){
vector<vector<int> > temp;
temp.push_back(a);
vector<int> b;
temp.push_back(b);
return temp;
}
else
{
//here is what i am doing
// getSubsets({1, 2, 3})
//without = getSubsets({1, 2})
//without = {1}, {2}, {}, {1, 2}
//with = {1, 3}, {2, 3}, {3}, {1, 2, 3}
//total = {{1}, {2}, {}, {1, 2}, {1, 3}, {2, 3}, {3}, {1, 2, 3}}
//return total
int last = a[a.size() - 1];
a.pop_back();
vector<vector<int> > without = getSubsets(a);
vector<vector<int> > with = without;
for(int i=0;i<without.size();i++){
with[i].push_back(last);
}
vector<vector<int> > total;
for(int j=0;j<without.size();j++){
total.push_back(without[j]);
}
for(int k=0;k<with.size();k++){
total.push_back(with[k]);
}
return total;
}
}
If you're using php 7.3 for laravel 5.7. this work for me
sudo apt-get install php-gd php-xml php7.3-mbstring
On Windows I use Far Manager for file search. BSD licensed, works in console, saves time on typing cmdline parameters. Here is its search dialog invoked by Alt-F7.
A slave isn't a server, it's a client type application. Network clients (almost) never use a specific port. Instead, they ask the OS for a random free port. This works much better since you usually run clients on many machines where the current configuration isn't known in advance. This prevents thousands of "client wouldn't start because port is already in use" bug reports every day.
You need to tell the security department that the slave isn't a server but a client which connects to the server and you absolutely need to have a rule which says client:ANY -> server:FIXED. The client port number should be >= 1024 (ports 1 to 1023 need special permissions) but I'm not sure if you actually gain anything by adding a rule for this - if an attacker can open privileged ports, they basically already own the machine.
If they argue, then ask them why they don't require the same rule for all the web browsers which people use in your company.
This is just a sample code, but it may help you get on your way:
Public Sub testIt()
Workbooks("Workbook2").Activate
ActiveWorkbook.Sheets("Sheet2").Activate
ActiveSheet.Range("B3").Select
ActiveCell.EntireRow.Insert
End Sub
I am assuming that you can open the book (called Workbook2
in the example).
I think (but I'm not sure) you can squash all this in a single line of code:
Workbooks("Workbook2").Sheets("Sheet2").Range("B3").EntireRow.Insert
This way you won't need to activate the workbook (or sheet or cell)... Obviously, the book has to be open.
Reproducing tim_yates answer on current hardware and adding leftShift() and concat() method to check the finding:
'String leftShift' {
foo << bar << baz
}
'String concat' {
foo.concat(bar)
.concat(baz)
.toString()
}
The outcome shows concat() to be the faster solution for a pure String, but if you can handle GString somewhere else, GString template is still ahead, while honorable mention should go to leftShift() (bitwise operator) and StringBuffer() with initial allocation:
Environment
===========
* Groovy: 2.4.8
* JVM: OpenJDK 64-Bit Server VM (25.191-b12, Oracle Corporation)
* JRE: 1.8.0_191
* Total Memory: 238 MB
* Maximum Memory: 3504 MB
* OS: Linux (4.19.13-300.fc29.x86_64, amd64)
Options
=======
* Warm Up: Auto (- 60 sec)
* CPU Time Measurement: On
user system cpu real
String adder 453 7 460 469
String leftShift 287 2 289 295
String concat 169 1 170 173
GString template 24 0 24 24
Readable GString template 32 0 32 32
GString template toString 400 0 400 406
Readable GString template toString 412 0 412 419
StringBuilder 325 3 328 334
StringBuffer 390 1 391 398
StringBuffer with Allocation 259 1 260 265
The answer by Nils describes how to convert objects to maps, which I found very useful. However, the OP was also wondering where this information is in the MDN docs. While it may not have been there when the question was originally asked, it is now on the MDN page for Object.entries() under the heading Converting an Object to a Map which states:
Converting an Object to a Map
The
new Map()
constructor accepts an iterable ofentries
. WithObject.entries
, you can easily convert fromObject
toMap
:const obj = { foo: 'bar', baz: 42 }; const map = new Map(Object.entries(obj)); console.log(map); // Map { foo: "bar", baz: 42 }
While the original question may not have been specific to a web service, here is a complete testWebService you can add to display a web service non-cached response plus the file version. We use file version instead of assembly version because we want to know a version, but with all assembly versions 1.0.0.0, the web site can be easily patched (signing and demand link still active!). Replace @Class@ with the name of the web api controller this service is embedded in. It's good for a go/nogo on a web service plus a quick version check.
[Route("api/testWebService")]
[AllowAnonymous]
[HttpGet]
public HttpResponseMessage TestWebService()
{
HttpResponseMessage responseMessage = Request.CreateResponse(HttpStatusCode.OK);
string loc = Assembly.GetAssembly(typeof(@Class@)).Location;
FileVersionInfo versionInfo = FileVersionInfo.GetVersionInfo(loc);
responseMessage.Content = new StringContent($"<h2>The XXXXX web service GET test succeeded.</h2>{DateTime.Now}<br/><br/>File Version: {versionInfo.FileVersion}");
responseMessage.Content.Headers.ContentType = new MediaTypeHeaderValue("text/html");
Request.RegisterForDispose(responseMessage);
return responseMessage;
}
I found it also necessary to add the following to web.config under configuration to make it truly anonymous
<location path="api/testwebservice">
<system.web>
<authorization>
<allow users="*" />
</authorization>
</system.web>
</location>
You can try also a tidyverse
library(tidyverse)
dummyData %>%
as.tibble() %>%
count(value)
# A tibble: 2 x 2
value n
<dbl> <int>
1 1 25
2 2 75
As mentioned, PEP 8 says to use lower_case_with_underscores
for variables, methods and functions.
I prefer using lower_case_with_underscores
for variables and mixedCase
for methods and functions makes the code more explicit and readable. Thus following the Zen of Python's "explicit is better than implicit" and "Readability counts"
I would just like to add that if you are getting "deprecated" message when using getDrawable(...) you should use the following method from the support library instead.
ContextCompat.getDrawable(getContext(),R.drawable.[name])
You do not have to use getResources() when using this method.
This is equivalent to doing something like
Drawable mDrawable;
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP){
mDrawable = ContextCompat.getDrawable(getContext(),R.drawable.[name]);
} else {
mDrawable = getResources().getDrawable(R.id.[name]);
}
This works on both pre and post Lollipop versions.
The worse thing is not having a decent stack trace which you simply cannot generate using an HttpInterceptor
(hope to stand corrected). All you get is a load of zone and rxjs useless bloat, and not the line or class that generated the error.
To do this you will need to generate a stack in an extended HttpClient
, so its not advisable to do this in a production environment.
/**
* Extended HttpClient that generates a stack trace on error when not in a production build.
*/
@Injectable()
export class TraceHttpClient extends HttpClient {
constructor(handler: HttpHandler) {
super(handler);
}
request(...args: [any]): Observable<any> {
const stack = environment.production ? null : Error().stack;
return super.request(...args).pipe(
catchError((err) => {
// tslint:disable-next-line:no-console
if (stack) console.error('HTTP Client error stack\n', stack);
return throwError(err);
})
);
}
}
If you are using SQL Server 2005 the following will work:
select *
from sys.procedures
where is_ms_shipped = 0
.htpasswd requires full absolute path from the absolute root of the server.
Please get full absolute path of the file by echo echo $_SERVER['DOCUMENT_ROOT'];
.
here is working basic auth .htaccess script.
AuthType Basic
AuthName "Access to the Hidden Files"
AuthUserFile 'C:/xampp/htdocs/ht/.htpasswd'
Require valid-user
Before login
Afetr Login
in mysql lite you cannot insert multiple values, but you can save time by opening connection only one time and then doing all insertions and then closing connection. It saves a lot of time
If you forget your password for SQL plus 10g then follow the steps :
If it asks your old password then type the one you have given while installing.
I solved my problem using:
top -n1 -b | grep "proccess name"
in this case:
-n is used to set how many times top will what proccess
and -b is used to show all pids
it's prevents errors like : top: pid limit (20) exceeded
If you are using the package device_id to get the unique device id then that will add an android.permission.READ_PHONE_STATE
without your knowledge which eventually will lead to the Play Store warning.
Instead you can use the device_info package for the same purpose without the need of the extra permission. Check this SO thread
NSString* myNewString = [NSString stringWithFormat:@"%d", myInt];
No, for multiple reasons.
The path
module does not have an exists
/existsSync
method. It is in the fs
module. (Perhaps you just made a typo in your question?)
The docs explicitly discourage you from using exists
.
fs.exists()
is an anachronism and exists only for historical reasons. There should almost never be a reason to use it in your own code.In particular, checking if a file exists before opening it is an anti-pattern that leaves you vulnerable to race conditions: another process may remove the file between the calls to
fs.exists()
andfs.open()
. Just open the file and handle the error when it's not there.
Since we're talking about a directory rather than a file, this advice implies you should just unconditionally call mkdir
and ignore EEXIST
.
In general, You should avoid the *Sync
methods. They're blocking, which means absolutely nothing else in your program can happen while you go to the disk. This is a very expensive operation, and the time it takes breaks the core assumption of node's event loop.
The *Sync
methods are usually fine in single-purpose quick scripts (those that do one thing and then exit), but should almost never be used when you're writing a server: your server will be unable to respond to anyone for the entire duration of the I/O requests. If multiple client requests require I/O operations, your server will very quickly grind to a halt.
The only time I'd consider using *Sync
methods in a server application is in an operation that happens once (and only once), at startup. For example, require
actually uses readFileSync
to load modules.
Even then, you still have to be careful because lots of synchronous I/O can unnecessarily slow down your server's startup time.
Instead, you should use the asynchronous I/O methods.
So if we put together those pieces of advice, we get something like this:
function ensureExists(path, mask, cb) {
if (typeof mask == 'function') { // allow the `mask` parameter to be optional
cb = mask;
mask = 0777;
}
fs.mkdir(path, mask, function(err) {
if (err) {
if (err.code == 'EEXIST') cb(null); // ignore the error if the folder already exists
else cb(err); // something else went wrong
} else cb(null); // successfully created folder
});
}
And we can use it like this:
ensureExists(__dirname + '/upload', 0744, function(err) {
if (err) // handle folder creation error
else // we're all good
});
Of course, this doesn't account for edge cases like
If you are trying to track down which line caused an error, if you right-click in the Python shell where the line error is displayed it will come up with a "Go to file/line" which takes you directly to the line in question.
What you've got (according to the debug image) is an object array containing a string array. So you need something like:
Object[] objects = (Object[]) values;
String[] strings = (String[]) objects[0];
You haven't shown the type of values
- if this is already Object[]
then you could just use (String[])values[0]
.
Of course even with the cast to Object[]
you could still do it in one statement, but it's ugly:
String[] strings = (String[]) ((Object[])values)[0];
The thing makes Matlab so popular and special is its excellent toolboxes in different disciplines. Since your main goal is to learn Matlab, so there is not different at all if you work with Octave or Matlab!
Just going and buying Matlab without any cool toolbox (which basically depends on your major) is not really a reasonable expense!
You can definitely have a good start with Octave, and follow tons of tutorials on Matlab on the internet.
I used VML(Vector Markup Language) based formatting in my email template. In VML Based you have write your code within comment I took help from this site.
https://litmus.com/blog/a-guide-to-bulletproof-buttons-in-email-design#supporttable
Open SQL Developer. Go to Tools -> Preferences -> Databases -> Advanced Then explicitly set the Tnsnames Directory
My TNSNAMES was set up correctly and I could connect to Toad, SQL*Plus etc. but I needed to do this to get SQL Developer to work. Perhaps it was a Win 7 issue as it was a pain to install too.
You need to use "\n"
not '\n'
in your gsub. The different quote marks behave differently.
Double quotes "
allow character expansion and expression interpolation ie. they let you use escaped control chars like \n
to represent their true value, in this case, newline, and allow the use of #{expression}
so you can weave variables and, well, pretty much any ruby expression you like into the text.
While on the other hand, single quotes '
treat the string literally, so there's no expansion, replacement, interpolation or what have you.
In this particular case, it's better to use either the .delete
or .tr
String method to delete the newlines.
Once you have selected an element you can call click()
document.getElementById('link').click();
see: https://developer.mozilla.org/En/DOM/Element.click
I don't remember if this works on IE, but it should. I don't have a windows machine nearby.
set_include_path(get_include_path() . $_SERVER["DOCUMENT_ROOT"] . "/mysite/php/includes/");
Also this can help.See set_include_path()
Tomcat can tell you in several ways. Here's the easiest:
$ /path/to/catalina.sh version
Using CATALINA_BASE: /usr/local/apache-tomcat-7.0.29
Using CATALINA_HOME: /usr/local/apache-tomcat-7.0.29
Using CATALINA_TMPDIR: /usr/local/apache-tomcat-7.0.29/temp
Using JRE_HOME: /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home
Using CLASSPATH: /usr/local/apache-tomcat-7.0.29/bin/bootstrap.jar:/usr/local/apache-tomcat-7.0.29/bin/tomcat-juli.jar
Server version: Apache Tomcat/7.0.29
Server built: Jul 3 2012 11:31:52
Server number: 7.0.29.0
OS Name: Mac OS X
OS Version: 10.7.4
Architecture: x86_64
JVM Version: 1.6.0_33-b03-424-11M3720
JVM Vendor: Apple Inc.
If you don't know where catalina.sh
is (or it never gets called), you can usually find it via ps
:
$ ps aux | grep catalina
chris 930 0.0 3.1 2987336 258328 s000 S Wed01PM 2:29.43 /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -Dnop -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.library.path=/usr/local/apache-tomcat-7.0.29/lib -Djava.endorsed.dirs=/usr/local/apache-tomcat-7.0.29/endorsed -classpath /usr/local/apache-tomcat-7.0.29/bin/bootstrap.jar:/usr/local/apache-tomcat-7.0.29/bin/tomcat-juli.jar -Dcatalina.base=/Users/chris/blah/blah -Dcatalina.home=/usr/local/apache-tomcat-7.0.29 -Djava.io.tmpdir=/Users/chris/blah/blah/temp org.apache.catalina.startup.Bootstrap start
From the ps
output, you can see both catalina.home
and catalina.base
. catalina.home
is where the Tomcat base files are installed, and catalina.base
is where the running configuration of Tomcat exists. These are often set to the same value unless you have configured your Tomcat for multiple (configuration) instances to be launched from a single Tomcat base install.
You can also interrogate the JVM directly if you can't find it in a ps
listing:
$ jinfo -sysprops 930 | grep catalina
Attaching to process ID 930, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 20.8-b03-424
catalina.base = /Users/chris/blah/blah
[...]
catalina.home = /usr/local/apache-tomcat-7.0.29
If you can't manage that, you can always try to write a JSP that dumps the values of the two system properties catalina.home
and catalina.base
.
Well this should change your format to text.
Worksheets("Sheetname").Activate
Worksheets("SheetName").Columns(1).Select 'or Worksheets("SheetName").Range("A:A").Select
Selection.NumberFormat = "@"
getdate()
for MS-SQL, sysdate
for Oracle server
For Sql Server 2017 and later you can use the new STRING_AGG
function
https://docs.microsoft.com/en-us/sql/t-sql/functions/string-agg-transact-sql
The following example replaces null values with 'N/A' and returns the names separated by commas in a single result cell.
SELECT STRING_AGG ( ISNULL(FirstName,'N/A'), ',') AS csv FROM Person.Person;
Here is the result set.
John,N/A,Mike,Peter,N/A,N/A,Alice,Bob
Perhaps a more common use case is to group together and then aggregate, just like you would with SUM
, COUNT
or AVG
.
SELECT a.articleId, title, STRING_AGG (tag, ',') AS tags
FROM dbo.Article AS a
LEFT JOIN dbo.ArticleTag AS t
ON a.ArticleId = t.ArticleId
GROUP BY a.articleId, title;
You need to handle it via ajax
submit.
Something like this:
$(function(){
$('#subscribe-email-form').on('submit', function(e){
e.preventDefault();
$.ajax({
url: url, //this is the submit URL
type: 'GET', //or POST
data: $('#subscribe-email-form').serialize(),
success: function(data){
alert('successfully submitted')
}
});
});
});
A better way would be to use a django form, and then render the following snippet:
<form>
<div class="modal-body">
<input type="email" placeholder="email"/>
<p>This service will notify you by email should any issue arise that affects your plivo service.</p>
</div>
<div class="modal-footer">
<input type="submit" value="SUBMIT" class="btn"/>
</div>
</form>
via the context - example : {{form}}
.
When a user logs in on my website, a User() object is instantiated from the username and password.
If I need a user object without the user being there to log in (e.g. an admin user might want to delete another users account, so i need to instantiate that user and call its delete method):
I have class methods to grab the user object.
class User():
#lots of code
#...
# more code
@classmethod
def get_by_username(cls, username):
return cls.query(cls.username == username).get()
@classmethod
def get_by_auth_id(cls, auth_id):
return cls.query(cls.auth_id == auth_id).get()
The presence of argLine configurations in either of surefire and jacoco plugins stops the jacoco report generation. The argLine should be defined in properties
<properties>
<argLine>your jvm options here</argLine>
</properties>
This is impossible because generics in Java are only considered at compile time. Thus, the Java generics are just some kind of pre-processor. However you can get the actual class of the members of the list.
aws s3 ls s3://bucket-name/folder-prefix-if-any --recursive | wc -l
Well, if you want the super easiest method, just put
<div class="left">left</div>
<div class="right">right</div>
.left {
float: left;
}
though you may need more than that depending on what other layout requirements you have.
A good sample would help to understand things better:
HTML
<div id="root">
</div>
CSS
.box {
display: block;
width: 200px;
height: 200px;
background-color: gray;
color: white;
text-align: center;
vertical-align: middle;
cursor: pointer;
}
.box.green {
background-color: green;
}
React code
class App extends React.Component {
constructor(props) {
super(props);
this.state = {addClass: false}
}
toggle() {
this.setState({addClass: !this.state.addClass});
}
render() {
let boxClass = ["box"];
if(this.state.addClass) {
boxClass.push('green');
}
return(
<div className={boxClass.join(' ')} onClick={this.toggle.bind(this)}>{this.state.addClass ? "Remove a class" : "Add a class (click the box)"}<br />Read the tutorial <a href="http://www.automationfuel.com" target="_blank">here</a>.</div>
);
}
}
ReactDOM.render(<App />, document.getElementById("root"));
I started hosting as a service with pywin32.
Everything was well but I met the problem that service was not able to start within 30 seconds (default timeout for Windows) on system startup. It was critical for me because Windows startup took place simultaneous on several virtual machines hosted on one physical machine, and IO load was huge. Error messages were:
Error 1053: The service did not respond to the start or control request in a timely fashion.
Error 7009: Timeout (30000 milliseconds) waiting for the <ServiceName> service to connect.
I fought a lot with pywin, but ended up with using NSSM as it was proposed in this answer. It was very easy to migrate to it.
I'm not aware of any way to do it using the standard library. But I do know and use this class that deals with html entities.
"HTMLEntities is an Open Source Java class that contains a collection of static methods (htmlentities, unhtmlentities, ...) to convert special and extended characters into HTML entitities and vice versa."
http://www.tecnick.com/public/code/cp_dpage.php?aiocp_dp=htmlentities
This way work for me:
@Override
protected void onCreate(Bundle savedInstanceState) {
setTheme(GApplication.getInstance().getTheme());
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
Then you want to change a new theme:
GApplication.getInstance().setTheme(R.style.LightTheme);
recreate();
First modify the column to remove the auto_increment field like this: alter table user_customer_permission modify column id int;
Next, drop the primary key. alter table user_customer_permission drop primary key;
I was able to override compatibility mode by specifying the meta tag as THE FIRST TAG in the head section, not just the first meta tag but as and only as the VERY FIRST TAG.
Thanks to @stefan.s for putting me on to it in your excellent answer. Prior to reading that I had:
THIS DID NOT WORK
<head>
<link rel="stylesheet" type="text/css" href="/qmuat/plugins/editors/jckeditor/typography/typography.php"/>
<meta http-equiv="x-ua-compatible" content="IE=9" >
moved the link tag out of the way and it worked
THIS WORKS:
<head><meta http-equiv="x-ua-compatible" content="IE=9" >
So an IE8 client set to use compatibility renders the page as IE8 Standard mode - the content='IE=9' means use the highest standard available up to and including IE9.
Here a library that lets you write your python scripts once and decide which integration method (Jython, CPython/PyPy via Jep and Py4j) to use at runtime:
https://github.com/subes/invesdwin-context-python
Since each method has its own benefits/drawbacks as explained in the link.
port number 3306 is used for MySQL and tomcat using 8080 port.more port numbers are available for run the servers or software whatever may be for our instant compilation..8080 is default for number so only we are getting port error in eclipse IDE. jvm and tomcat always prefer the 8080.3306 is default port number for MySQL.So only do not want to mention every time as "localhost:3306"
<?php
$dbhost = 'localhost:3306';
//3306 default port number $dbhost='localhost'; is enough to specify the port number
//when we are utilizing xammp default port number is 8080.
$dbuser = 'root';
$dbpass = '';
$db='users';
$conn = mysqli_connect($dbhost, $dbuser, $dbpass,$db) or die ("could not connect to mysql");
// mysqli_select_db("users") or die ("no database");
if(! $conn ) {
die('Could not connect: ' . mysqli_error($conn));
}else{
echo 'Connected successfully';
}
?>
After few years, I moved to leaflet map and I have fixed this issue completely, the following could be applied to google maps too:
var headerHeight = $("#navMap").outerHeight();
var footerHeight = $("footer").outerHeight();
var windowHeight = window.innerHeight;
var mapContainerHeight = headerHeight + footerHeight;
var totalMapHeight = windowHeight - mapContainerHeight;
$("#map").css("margin-top", headerHeight);
$("#map").height(totalMapHeight);
$(window).resize(function(){
var headerHeight = $("#navMap").outerHeight();
var footerHeight = $("footer").outerHeight();
var windowHeight = window.innerHeight;
var mapContainerHeight = headerHeight + footerHeight;
var totalMapHeight = windowHeight - mapContainerHeight;
$("#map").css("margin-top", headerHeight);
$("#map").height(totalMapHeight);
map.fitBounds(group1.getBounds());
});
Following code might be useful if someone is using React and has a different component of Marker and want to remove marker from map.
export default function useGoogleMapMarker(props) {
const [marker, setMarker] = useState();
useEffect(() => {
// ...code
const marker = new maps.Marker({ position, map, title, icon });
// ...code
setMarker(marker);
return () => marker.setMap(null); // to remove markers when unmounts
}, []);
return marker;
}
Below code works for me in Angular 4
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
export class RegisterComponent implements OnInit {
registerForm: FormGroup;
constructor(private formBuilder: FormBuilder) { }
ngOnInit() {
this.registerForm = this.formBuilder.group({
empname: [''],
empemail: ['']
});
}
onRegister(){
//sending data to server using http request
this.registerForm.reset()
}
}
What you're basically doing here is relying on Date#toString()
which already has a fixed pattern. To convert a Java Date
object into another human readable String pattern, you need SimpleDateFormat#format()
.
private String modifyDateLayout(String inputDate) throws ParseException{
Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss z").parse(inputDate);
return new SimpleDateFormat("dd.MM.yyyy HH:mm:ss").format(date);
}
By the way, the "unparseable date" exception can here only be thrown by SimpleDateFormat#parse()
. This means that the inputDate
isn't in the expected pattern "yyyy-MM-dd HH:mm:ss z"
. You'll probably need to modify the pattern to match the inputDate
's actual pattern.
Update: Okay, I did a test:
public static void main(String[] args) throws Exception {
String inputDate = "2010-01-04 01:32:27 UTC";
String newDate = new Test().modifyDateLayout(inputDate);
System.out.println(newDate);
}
This correctly prints:
03.01.2010 21:32:27
(I'm on GMT-4)
Update 2: as per your edit, you really got a ParseException
on that. The most suspicious part would then be the timezone of UTC
. Is this actually known at your Java environment? What Java version and what OS version are you using? Check TimeZone.getAvailableIDs()
. There must be a UTC
in between.
When the LinkButton Enabled property is false it just renders a standard hyperlink. When you right click any disabled hyperlink you don't get the option to open in anything.
try
lbnkVidTtile1.Enabled = true;
I'm sorry if I misunderstood. Could I just make sure that you understand the purpose of a LinkButton? It is to give the appearance of a HyperLink but the behaviour of a Button. This means that it will have an anchor tag, but there is JavaScript wired up that performs a PostBack to the page. If you want to link to another page then it is recommended here that you use a standard HyperLink control.
Ok I was running into the same issue. What I failed to notice is that I was using json_decode() instead of using json_encode() so for those who are going to come here please make sure you are using the right function, which is json_encode()
Note: Depends on what you are working on but make sure you are using the right function.
Another option is to use one of my personal favorite CSS tools: box-shadow
.
A box shadow is really a drop-shadow on the node. It looks like this:
-moz-box-shadow: 1px 2px 3px rgba(0,0,0,.5);
-webkit-box-shadow: 1px 2px 3px rgba(0,0,0,.5);
box-shadow: 1px 2px 3px rgba(0,0,0,.5);
The arguments are:
1px: Horizontal offset of the effect. Positive numbers shift it right, negative left.
2px: Vertical offset of the effect. Positive numbers shift it down, negative up.
3px: The blur effect. 0 means no blur.
color: The color of the shadow.
So, you could leave your current design, and add a box-shadow like:
box-shadow: 0px -2px 2px rgba(34,34,34,0.6);
This should give you a 'blurry' top-edge.
This website will help with more information: http://css-tricks.com/snippets/css/css-box-shadow/
Try a slight different approach:
//set string and append it as object
var myHtmlString = '<iframe id="myFrame" width="854" height="480" src="http://www.youtube.com/embed/gYKqrjq5IjU?feature=oembed" frameborder="0" allowfullscreen></iframe>';
$('body').append(myHtmlString);
//as you noticed you can't just get it back
var myHtmlStringBack = $('#myFrame').html();
alert(myHtmlStringBack); // will be empty (a bug in jquery?) but...
//since an id was added to your iframe so you can retrieve its attributes back...
var width = $('#myFrame').attr('width');
var height = $('#myFrame').attr('height');
var src = $('#myFrame').attr('src');
var myReconstructedString = '<iframe id="myFrame" width="'+ width +'" height="'+ height +'" src="'+ src+'" frameborder="0" allowfullscreen></iframe>';
alert(myReconstructedString);
This can not be done purely with css. This is a behaviour, which affects the styling of the page.
With jquery you can quickly implement the behavior from your question:
$(function() {
$('#a').hover(function() {
$('#b').css('background-color', 'yellow');
}, function() {
// on mouseout, reset the background colour
$('#b').css('background-color', '');
});
});
I've found this answer in the site https://plainjs.com/javascript/styles/set-and-get-css-styles-of-elements-53/.
In this code we add multiple styles in an element:
let_x000D_
element = document.querySelector('span')_x000D_
, cssStyle = (el, styles) => {_x000D_
for (var property in styles) {_x000D_
el.style[property] = styles[property];_x000D_
}_x000D_
}_x000D_
;_x000D_
_x000D_
cssStyle(element, { background:'tomato', color: 'white', padding: '0.5rem 1rem'});
_x000D_
span{_x000D_
font-family: sans-serif;_x000D_
color: #323232;_x000D_
background: #fff;_x000D_
}
_x000D_
<span>_x000D_
lorem ipsum_x000D_
</span>
_x000D_
This can be achieved by creating a drawable xml file containing a list of states for the button. So for example if you create a new xml file called "button.xml" with the following code:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/YOURIMAGE" />
<item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/gradient" />
<item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/gradient" />
<item android:drawable="@drawable/YOURIMAGE" />
</selector>
To keep the background image with a darkened appearance on press, create a second xml file and call it gradient.xml with the following code:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<bitmap android:src="@drawable/YOURIMAGE"/>
</item>
<item>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient android:angle="90" android:startColor="#880f0f10" android:centerColor="#880d0d0f" android:endColor="#885d5d5e"/>
</shape>
</item>
</layer-list>
In the xml of your button set the background to be the button xml e.g.
android:background="@drawable/button"
Hope this helps!
Edit: Changed the above code to show an image (YOURIMAGE) in the button as opposed to a block colour.
You could use "Test Mail Server Tool" to test email sending on your machine or localhost. Google and Download "Test Mail Server Tool" and set it up.
Then in your settings.py:
EMAIL_BACKEND= 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'localhost'
EMAIL_PORT = 25
From shell:
from django.core.mail import send_mail
send_mail('subject','message','sender email',['receipient email'], fail_silently=False)
Since I'm the current world record holder for the most digits of pi, I'll add my two cents:
Unless you're actually setting a new world record, the common practice is just to verify the computed digits against the known values. So that's simple enough.
In fact, I have a webpage that lists snippets of digits for the purpose of verifying computations against them: http://www.numberworld.org/digits/Pi/
But when you get into world-record territory, there's nothing to compare against.
Historically, the standard approach for verifying that computed digits are correct is to recompute the digits using a second algorithm. So if either computation goes bad, the digits at the end won't match.
This does typically more than double the amount of time needed (since the second algorithm is usually slower). But it's the only way to verify the computed digits once you've wandered into the uncharted territory of never-before-computed digits and a new world record.
Back in the days where supercomputers were setting the records, two different AGM algorithms were commonly used:
These are both O(N log(N)^2)
algorithms that were fairly easy to implement.
However, nowadays, things are a bit different. In the last three world records, instead of performing two computations, we performed only one computation using the fastest known formula (Chudnovsky Formula):
This algorithm is much harder to implement, but it is a lot faster than the AGM algorithms.
Then we verify the binary digits using the BBP formulas for digit extraction.
This formula allows you to compute arbitrary binary digits without computing all the digits before it. So it is used to verify the last few computed binary digits. Therefore it is much faster than a full computation.
The advantage of this is:
The disadvantage is:
I've glossed over some details of why verifying the last few digits implies that all the digits are correct. But it is easy to see this since any computation error will propagate to the last digits.
Now this last step (verifying the conversion) is actually fairly important. One of the previous world record holders actually called us out on this because, initially, I didn't give a sufficient description of how it worked.
So I've pulled this snippet from my blog:
N = # of decimal digits desired
p = 64-bit prime number
Compute A using base 10 arithmetic and B using binary arithmetic.
If A = B
, then with "extremely high probability", the conversion is correct.
For further reading, see my blog post Pi - 5 Trillion Digits.
Here is my combined solution for various PHP versions.
In my company we are working with different servers with various PHP versions, so I had to find solution working for all.
$phpVersion = substr(phpversion(), 0, 3)*1;
if($phpVersion >= 5.4) {
$encodedValue = json_encode($value, JSON_UNESCAPED_UNICODE);
} else {
$encodedValue = preg_replace('/\\\\u([a-f0-9]{4})/e', "iconv('UCS-4LE','UTF-8',pack('V', hexdec('U$1')))", json_encode($value));
}
Credits should go to Marco Gasi & abu. The solution for PHP >= 5.4 is provided in the json_encode docs.
One notable difference in Python 2 is that if you're using ensure_ascii=False
, dump
will properly write UTF-8 encoded data into the file (unless you used 8-bit strings with extended characters that are not UTF-8):
dumps
on the other hand, with ensure_ascii=False
can produce a str
or unicode
just depending on what types you used for strings:
Serialize obj to a JSON formatted str using this conversion table. If ensure_ascii is False, the result may contain non-ASCII characters and the return value may be a
unicode
instance.
(emphasis mine). Note that it may still be a str
instance as well.
Thus you cannot use its return value to save the structure into file without checking which
format was returned and possibly playing with unicode.encode
.
This of course is not valid concern in Python 3 any more, since there is no more this 8-bit/Unicode confusion.
As for load
vs loads
, load
considers the whole file to be one JSON document, so you cannot use it to read multiple newline limited JSON documents from a single file.
I was facing this issue and fixed by putting a check in form attribute. This issue can happen when the FormGroup is not initialized.
<form [formGroup]="loginForm" *ngIf="loginForm">
OR
<form [formGroup]="loginForm" *ngIf="this.loginForm">
This will not render the form until it is initialized.
You can also use the following code :
package com.agileinfotech.bsviewer.ldap;
import java.util.Hashtable;
import java.util.ResourceBundle;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
public class LDAPLoginAuthentication {
public LDAPLoginAuthentication() {
// TODO Auto-generated constructor
}
ResourceBundle resBundle = ResourceBundle.getBundle("settings");
@SuppressWarnings("unchecked")
public String authenticateUser(String username, String password) {
String strUrl = "success";
Hashtable env = new Hashtable(11);
boolean b = false;
String Securityprinciple = "cn=" + username + "," + resBundle.getString("UserSearch");
env.put(Context.INITIAL_CONTEXT_FACTORY, resBundle.getString("InitialContextFactory"));
env.put(Context.PROVIDER_URL, resBundle.getString("Provider_url"));
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, Securityprinciple);
env.put(Context.SECURITY_CREDENTIALS, password);
try {
// Create initial context
DirContext ctx = new InitialDirContext(env);
// Close the context when we're done
b = true;
ctx.close();
} catch (NamingException e) {
b = false;
} finally {
if (b) {
strUrl = "success";
} else {
strUrl = "failer";
}
}
return strUrl;
}
}
I consider that the most Pythonic way is to use a list comprehension instead of map
and filter
. The reason is that list comprehensions are clearer than map
and filter
.
In [1]: odd_cubes = [x ** 3 for x in range(10) if x % 2 == 1] # using a list comprehension
In [2]: odd_cubes_alt = list(map(lambda x: x ** 3, filter(lambda x: x % 2 == 1, range(10)))) # using map and filter
In [3]: odd_cubes == odd_cubes_alt
Out[3]: True
As you an see, a comprehension does not require extra lambda
expressions as map
needs. Furthermore, a comprehension also allows filtering easily, while map
requires filter
to allow filtering.
You can also try BootFlat, which has a section in their documentation specifically for crafting Timelines:
input.split(/\s*[\s,]\s*/)
… \s*
matches zero or more white space characters (not just spaces, but also tabs and newlines).
... [\s,]
matches one white space character or one comma
If you want to avoid blank elements from input like "foo,bar,,foobar"
, this will do the trick:
input.split(/(\s*,?\s*)+/)
The +
matches one or more of the preceding character or group.
Edit:
Added ?
after comma which matches zero or one comma.
Edit 2:
Turns out edit 1 was a mistake. Fixed it. Now there has to be at least one comma or one space for the expression to find a match.
Ems is a typography term, it controls text size, etc. Check here
You could load each file separately, filter them with file.zipWithIndex().filter(_._2 > 0)
and then union all the file RDDs.
If the number of files is too large, the union could throw a StackOverflowExeption
.
Yes, it is possible. You have to do something like this:
if(isset($_POST['submit']))
{
$type_id = ($_POST['type_id'] == '' ? "null" : "'".$_POST['type_id']."'");
$sql = "INSERT INTO `table` (`type_id`) VALUES (".$type_id.")";
}
It checks if the $_POST['type_id']
variable has an empty value.
If yes, it assign NULL
as a string to it.
If not, it assign the value with ' to it for the SQL
notation
Thanks to the article above.
In my case, i have this issue with my WPF project in VS.Net 2008. After going through this article, i was realizing that the assembly used in the web service is different version of assembly used on client.
It works just fine after updating the assembly on the client.
use the JavaScript Date()
object. There are a number of ways to get the time, date, timestamps, etc from the object. (Reference)
function myFunction() {
var d = new Date();
var timeStamp = d.getTime(); // Number of ms since Jan 1, 1970
// OR:
var currentTime = d.toLocaleTimeString(); // "12:35 PM", for instance
}
An alternative solution is to execute an external command, obviously, this solution limits the portability of the application.
For example, for an application that runs on Windows, a PowerShell command can be executed through jPowershell, as shown in the following code:
public String getMyPublicIp() {
// PowerShell command
String command = "(Invoke-WebRequest ifconfig.me/ip).Content.Trim()";
String powerShellOut = PowerShell.executeSingleCommand(command).getCommandOutput();
// Connection failed
if (powerShellOut.contains("InvalidOperation")) {
powerShellOut = null;
}
return powerShellOut;
}
If your class is non-activity class, and creating an instance of it from the activiy, you can pass an instance of context via constructor of the later as follows:
class YourNonActivityClass{
// variable to hold context
private Context context;
//save the context recievied via constructor in a local variable
public YourNonActivityClass(Context context){
this.context=context;
}
}
You can create instance of this class from the activity as follows:
new YourNonActivityClass(this);
$array[] = 'Hi';
pushes on top of the array.
$array['Hi'] = 'FooBar';
sets a specific index.
Webkit's support for scrollbars is quite sophisticated. This CSS gives a very minimal scrollbar, with a light grey track and a darker thumb:
::-webkit-scrollbar
{
width: 12px; /* for vertical scrollbars */
height: 12px; /* for horizontal scrollbars */
}
::-webkit-scrollbar-track
{
background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb
{
background: rgba(0, 0, 0, 0.5);
}
This answer is a fantastic source of additional information.
Adding external Jar is not smart in case you want to change the project location in filesystem.
The best way is to add the jar to build path so your project will compile if exported:
Create a folder called lib in your project folder.
copy to this folder all the jar files you need.
Refresh your project in eclipse.
Select all the jar files, then right click on one of them and select Build Path -> Add to Build Path
I'd like to add a mention of the "brew" package. You can write a brew template file which would be LaTeX with placeholders, and then "brew" it up to create a .tex file to \include or \input into your LaTeX. Something like:
\begin{tabular}{l l}
A & <%= fit$A %> \\
B & <%= fit$B %> \\
\end{tabular}
The brew syntax can also handle loops, so you can create a table row for each row of a dataframe.
In case it's useful to anyone, you can download from my web site a small Java agent for querying the memory usage of an object. It'll let you query "deep" memory usage as well.
<script type="text/javascript">
var jvalue = 'this is javascript value';
<?php $abc = "<script>document.write(jvalue)</script>"?>
</script>
<?php echo 'php_'.$abc;?>
Here's how I'd do it -
For Schemas (or Databases - they are synonyms):
SELECT default_character_set_name FROM information_schema.SCHEMATA
WHERE schema_name = "schemaname";
For Tables:
SELECT CCSA.character_set_name FROM information_schema.`TABLES` T,
information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA
WHERE CCSA.collation_name = T.table_collation
AND T.table_schema = "schemaname"
AND T.table_name = "tablename";
For Columns:
SELECT character_set_name FROM information_schema.`COLUMNS`
WHERE table_schema = "schemaname"
AND table_name = "tablename"
AND column_name = "columnname";
I'd the same error even after recompiling the modules.
But I solved it you just have to specify the absolute path of your phpize.
I tested below code with SQL Server 2008 R2 Express and I believe we should have solution for all 6 steps you outlined. Let's take on them one-by-one:
We can enable TCP/IP protocol with WMI:
set wmiComputer = GetObject( _
"winmgmts:" _
& "\\.\root\Microsoft\SqlServer\ComputerManagement10")
set tcpProtocols = wmiComputer.ExecQuery( _
"select * from ServerNetworkProtocol " _
& "where InstanceName = 'SQLEXPRESS' and ProtocolName = 'Tcp'")
if tcpProtocols.Count = 1 then
' set tcpProtocol = tcpProtocols(0)
' I wish this worked, but unfortunately
' there's no int-indexed Item property in this type
' Doing this instead
for each tcpProtocol in tcpProtocols
dim setEnableResult
setEnableResult = tcpProtocol.SetEnable()
if setEnableResult <> 0 then
Wscript.Echo "Failed!"
end if
next
end if
I believe your solution will work, just make sure you specify the right port. I suggest we pick a different port than 1433 and make it a static port SQL Server Express will be listening on. I will be using 3456 in this post, but please pick a different number in the real implementation (I feel that we will see a lot of applications using 3456 soon :-)
We can use WMI again. Since we are using static port 3456, we just need to update two properties in IPAll section: disable dynamic ports and set the listening port to 3456
:
set wmiComputer = GetObject( _
"winmgmts:" _
& "\\.\root\Microsoft\SqlServer\ComputerManagement10")
set tcpProperties = wmiComputer.ExecQuery( _
"select * from ServerNetworkProtocolProperty " _
& "where InstanceName='SQLEXPRESS' and " _
& "ProtocolName='Tcp' and IPAddressName='IPAll'")
for each tcpProperty in tcpProperties
dim setValueResult, requestedValue
if tcpProperty.PropertyName = "TcpPort" then
requestedValue = "3456"
elseif tcpProperty.PropertyName ="TcpDynamicPorts" then
requestedValue = ""
end if
setValueResult = tcpProperty.SetStringValue(requestedValue)
if setValueResult = 0 then
Wscript.Echo "" & tcpProperty.PropertyName & " set."
else
Wscript.Echo "" & tcpProperty.PropertyName & " failed!"
end if
next
Note that I didn't have to enable any of the individual addresses to make it work, but if it is required in your case, you should be able to extend this script easily to do so.
Just a reminder that when working with WMI, WBEMTest.exe is your best friend!
I wish we could use WMI again, but unfortunately this setting is not exposed through WMI. There are two other options:
Use LoginMode
property of Microsoft.SqlServer.Management.Smo.Server
class, as described here.
Use LoginMode value in SQL Server registry, as described in this post. Note that by default the SQL Server Express instance is named SQLEXPRESS
, so for my SQL Server 2008 R2 Express instance the right registry key was
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS\MSSQLServer
.
You got this one covered.
Since we are using a static port assigned to our SQL Server Express instance, there's no need to use instance name in the server address anymore.
SQLCMD -U sa -P newPassword -S 192.168.0.120,3456
Please let me know if this works for you (fingers crossed!).
The text uses combining characters, also known as combining marks. See section 2.11 of Combining Characters in the Unicode Standard (PDF).
In Unicode, character rendering does not use a simple character cell model where each glyph fits into a box with given height. Combining marks may be rendered above, below, or inside a base character
So you can easily construct a character sequence, consisting of a base character and “combining above” marks, of any length, to reach any desired visual height, assuming that the rendering software conforms to the Unicode rendering model. Such a sequence has no meaning of course, and even a monkey could produce it (e.g., given a keyboard with suitable driver).
And you can mix “combining above” and “combining below” marks.
The sample text in the question starts with:
H
ͭ
̓
̓
̇
Your string is invalid, but assuming it was valid, you'd have to do:
var finalData = str.replace(/\\/g, "");
When you want to replace all the occurences with .replace
, the first parameter must be a regex, if you supply a string, only the first occurrence will be replaced, that's why your replace wouldn't work.
Cheers
After reading many pages about FRP I finally came across this enlightening writing about FRP, it finally made me understand what FRP really is all about.
I quote below Heinrich Apfelmus (author of reactive banana).
What is the essence of functional reactive programming?
A common answer would be that “FRP is all about describing a system in terms of time-varying functions instead of mutable state”, and that would certainly not be wrong. This is the semantic viewpoint. But in my opinion, the deeper, more satisfying answer is given by the following purely syntactic criterion:
The essence of functional reactive programming is to specify the dynamic behavior of a value completely at the time of declaration.
For instance, take the example of a counter: you have two buttons labelled “Up” and “Down” which can be used to increment or decrement the counter. Imperatively, you would first specify an initial value and then change it whenever a button is pressed; something like this:
counter := 0 -- initial value on buttonUp = (counter := counter + 1) -- change it later on buttonDown = (counter := counter - 1)
The point is that at the time of declaration, only the initial value for the counter is specified; the dynamic behavior of counter is implicit in the rest of the program text. In contrast, functional reactive programming specifies the whole dynamic behavior at the time of declaration, like this:
counter :: Behavior Int counter = accumulate ($) 0 (fmap (+1) eventUp `union` fmap (subtract 1) eventDown)
Whenever you want to understand the dynamics of counter, you only have to look at its definition. Everything that can happen to it will appear on the right-hand side. This is very much in contrast to the imperative approach where subsequent declarations can change the dynamic behavior of previously declared values.
So, in my understanding an FRP program is a set of equations:
j
is discrete: 1,2,3,4...
f
depends on t
so this incorporates the possiblilty to model external stimuli
all state of the program is encapsulated in variables x_i
The FRP library takes care of progressing time, in other words, taking j
to j+1
.
I explain these equations in much more detail in this video.
EDIT:
About 2 years after the original answer, recently I came to the conclusion that FRP implementations have another important aspect. They need to (and usually do) solve an important practical problem: cache invalidation.
The equations for x_i
-s describe a dependency graph. When some of the x_i
changes at time j
then not all the other x_i'
values at j+1
need to be updated, so not all the dependencies need to be recalculated because some x_i'
might be independent from x_i
.
Furthermore, x_i
-s that do change can be incrementally updated. For example let's consider a map operation f=g.map(_+1)
in Scala, where f
and g
are List
of Ints
. Here f
corresponds to x_i(t_j)
and g
is x_j(t_j)
. Now if I prepend an element to g
then it would be wasteful to carry out the map
operation for all the elements in g
. Some FRP implementations (for example reflex-frp) aim to solve this problem. This problem is also known as incremental computing.
In other words, behaviours (the x_i
-s ) in FRP can be thought as cache-ed computations. It is the task of the FRP engine to efficiently invalidate and recompute these cache-s (the x_i
-s) if some of the f_i
-s do change.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = findViewById(R.id.button);
spinner = findViewById(R.id.sp_item);
setInfo();
spinnerAdapter = new SpinnerAdapter(this, arrayList);
spinner.setAdapter(spinnerAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//first, we have to retrieve the item position as a string
// then, we can change string value into integer
String item_position = String.valueOf(position);
int positonInt = Integer.valueOf(item_position);
Toast.makeText(MainActivity.this, "value is "+ positonInt, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
note: the position of items is counted from 0.
Check this out! It was built no longer ago in 2014.
Get a list of country/state/city in a hierarchy using geonames webservice
Although this entry is quite old and most of you probably already know, I think it's worth mention that GWT 2.x includes a new compile flag which speeds up compiles by skipping optimizations. You definitely shouldn't deploy JavaScript compiled that way, but it can be a time saver during non-production continuous builds.
Just include the flag: -draftCompile to your GWT compiler line.
You need to properly decode the source text. Most likely the source text is in UTF-8 format, not ASCII.
Because you do not provide any context or code for your question it is not possible to give a direct answer.
I suggest you study how unicode and character encoding is done in Python:
List indexes of -x mean the xth item from the end of the list, so n[-1]
means the last item in the list n
. Any good Python tutorial should have told you this.
It's an unusual convention that only a few other languages besides Python have adopted, but it is extraordinarily useful; in any other language you'll spend a lot of time writing n[n.length-1]
to access the last item of a list.
Wow...there is a lot of low-level security code in this thread -- most of which did not work for me, either -- although I learned a lot in the process. One thing that I learned is that most of this code is not geared to applications seeking per user access rights -- it is for Administrators wanting to alter rights programmatically, which -- as has been pointed out -- is not a good thing. As a developer, I cannot use the "easy way out" -- by running as Administrator -- which -- I am not one on the machine that runs the code, nor are my users -- so, as clever as these solutions are -- they are not for my situation, and probably not for most rank and file developers, either.
Like most posters of this type of question -- I initially felt it was "hackey", too -- I have since decided that it is perfectly alright to try it and let the possible exception tell you exactly what the user's rights are -- because the information I got did not tell me what the rights actually were. The code below -- did.
Private Function CheckUserAccessLevel(folder As String) As Boolean
Try
Dim newDir As String = String.Format("{0}{1}{2}",
folder,
If(folder.EndsWith("\"),
"",
"\"),
"LookWhatICanDo")
Dim lookWhatICanDo = Directory.CreateDirectory(newDir)
Directory.Delete(newDir)
Return True
Catch ex As Exception
Return False
End Try
End Function
If nothing worked, try this.
$date = '25/05/2010'; //dd/mm/YYYY
$dateAr = explode('/',);
$date = $dateAr[2].'-'.$dateAr[1].'-'.$dateAr[0]; //YYYY-mm-dd
Building on the above I needed to split a string at a non-printing character dropping the non-printing character. I developed two methods:
var str = "abc\u{1A}12345sdf"
let range1: Range<String.Index> = str.range(of: "\u{1A}")!
let index1: Int = str.distance(from: str.startIndex, to: range1.lowerBound)
let start = str.index(str.startIndex, offsetBy: index1)
let end = str.index(str.endIndex, offsetBy: -0)
let result = str[start..<end] // The result is of type Substring
let firstStr = str[str.startIndex..<range1.lowerBound]
which I put together using some of the answers above.
Because a String is a collection I then did the following:
var fString = String()
for (n,c) in str.enumerated(){
*if c == "\u{1A}" {
print(fString);
let lString = str.dropFirst(n + 1)
print(lString)
break
}
fString += String(c)
}*
Which for me was more intuitive. Which one is best? I have no way of telling They both work with Swift 5
URL-encoded payload must be provided on the body
parameter of the http.NewRequest(method, urlStr string, body io.Reader)
method, as a type that implements io.Reader
interface.
Based on the sample code:
package main
import (
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
)
func main() {
apiUrl := "https://api.com"
resource := "/user/"
data := url.Values{}
data.Set("name", "foo")
data.Set("surname", "bar")
u, _ := url.ParseRequestURI(apiUrl)
u.Path = resource
urlStr := u.String() // "https://api.com/user/"
client := &http.Client{}
r, _ := http.NewRequest(http.MethodPost, urlStr, strings.NewReader(data.Encode())) // URL-encoded payload
r.Header.Add("Authorization", "auth_token=\"XXXXXXX\"")
r.Header.Add("Content-Type", "application/x-www-form-urlencoded")
r.Header.Add("Content-Length", strconv.Itoa(len(data.Encode())))
resp, _ := client.Do(r)
fmt.Println(resp.Status)
}
resp.Status
is 200 OK
this way.
Another one with a different concept: http://www.klausbasan.de/misc/telnet/index.html
genrsa
has been replaced by genpkey
& when run manually in a terminal it will prompt for a password:
openssl genpkey -aes-256-cbc -algorithm RSA -out /etc/ssl/private/key.pem -pkeyopt rsa_keygen_bits:4096
However when run from a script the command will not ask for a password so to avoid the password being viewable as a process use a function in a shell
script:
get_passwd() {
local passwd=
echo -ne "Enter passwd for private key: ? "; read -s passwd
openssl genpkey -aes-256-cbc -pass pass:$passwd -algorithm RSA -out $PRIV_KEY -pkeyopt rsa_keygen_bits:$PRIV_KEYSIZE
}
As far as I can see, you just added heredoc by mistake
No need to use ugly heredoc syntax here.
Just remove it and everything will work:
<p>Hello</p>
<p><?= _("World"); ?></p>
If you need a PEM file without any password you can use this solution.
Just copy and paste the private key and the certificate to the same file and save as .pem.
The file will look like:
-----BEGIN PRIVATE KEY-----
............................
............................
-----END PRIVATE KEY-----
-----BEGIN CERTIFICATE-----
...........................
...........................
-----END CERTIFICATE-----
That's the only way I found to upload certificates to Cisco devices for HTTPS.
In my opinion,
git clean -df
should do the trick. As per Git documentation on git clean
git-clean - Remove untracked files from the working tree
Description
Cleans the working tree by recursively removing files that are not under version control, starting from the current directory.
Normally, only files unknown to Git are removed, but if the -x option is specified, ignored files are also removed. This can, for example, be useful to remove all build products.
If any optional ... arguments are given, only those paths are affected.
Options
-d Remove untracked directories in addition to untracked files. If an untracked directory is managed by a different Git repository, it is not removed by default. Use -f option twice if you really want to remove such a directory.
-f --force If the Git configuration variable clean.requireForce is not set to false, git clean will refuse to run unless given -f, -n or -i.
You should delete the file in the folder first , then the folder.This way you will recursively call the method.
For a strict Visual Basic approach, you can convert the floating-point value to an integer to round to said integer. VB is one of the rare languages that rounds on type conversion (most others simply truncate.)
Multiples of 5 or x can be done simply by dividing before and multiplying after the round.
If you want to round and keep decimal places, Math.round(n, d) would work.
You need to apply 3d transform to the element, so it will get its own composite layer. For instance:
.element{
-webkit-transform: translateZ(0);
transform: translateZ(0);
}
or
.element{
-webkit-transform: translate3d(0,0,0);
transform: translate3d(0,0,0);
}
More about layer creation criteria you can read right here: Accelerated Rendering in Chrome
An explanation:
Examples (hover green box):
When you use any transition on your element it cause browser to recalculate styles, then re-layout your content even if transition property is visual (in my examples it is an opacity) and finaly paint an element:
The issue here is re-layout of the content that can make an effect of "dancing" or "blinking" elements on the page while transition happens. If you will go to settings, check "Show composite layers" checkbox and then apply 3d transform to an element, you will see that it gets it's own layer which outlined with orange border.
After element gets its own layer, browser just needs to composite layers on transition without re-layout or even paint operations so problem have to be solved:
First go to computer then properties then advanced system settings then advanced
(3rd menu)
and then click environment variables button at the bottom.
To path in environment variables you add:
C:\Program Files\Java\jdk1.8.0_102\bin\;C:\Program Files\Java\jdk1.8.0_102\lib\;
and the error will go away. This is the best one.
The other way is to copy the jre folder (C:\Program Files\Java\jre1.8.0_102
) to
E:\eclipse-jee-indigo-SR2-win32\eclipse
folder. Then the error will go away.
Your question is already three years old and there are some details not covered in other answers:
Most people I know use HomeBrew or MacPorts, I prefer MacPorts because of its clean cut of what is a default Mac OS X environment and my development setup. Just move out your /opt folder and test your packages with a normal user Python environment
MacPorts is only portable within Mac, but with easy_install or pip you will learn how to setup your environment in any platform (Win/Mac/Linux/Bsd...). Furthermore it will always be more up to date and with more packages
I personally let MacPorts handle my Python modules to keep everything updated. Like any other high level package manager (ie: apt-get) it is much better for the heavy lifting of modules with lots of binary dependencies. There is no way I would build my Qt bindings (PySide) with easy_install or pip. Qt is huge and takes a lot to compile. As soon as you want a Python package that needs a library used by non Python programs, try to avoid easy_install or pip
At some point you will find that there are some packages missing within MacPorts. I do not believe that MacPorts will ever give you the whole CheeseShop. For example, recently I needed the Elixir module, but MacPorts only offers py25-elixir and py26-elixir, no py27 version. In cases like these you have:
pip-2.7 install --user elixir
( make sure you always type pip-(version) )
That will build an extra Python library in your home dir. Yes, Python will work with more than one library location: one controlled by MacPorts and a user local one for everything missing within MacPorts.
Now notice that I favor pip over easy_install. There is a good reason you should avoid setuptools and easy_install. Here is a good explanation and I try to keep away from them. One very useful feature of pip is giving you a list of all the modules (along their versions) that you installed with MacPorts, easy_install and pip itself:
pip-2.7 freeze
If you already started using easy_install, don't worry, pip can recognize everything done already by easy_install and even upgrade the packages installed with it.
If you are a developer keep an eye on virtualenv for controlling different setups and combinations of module versions. Other answers mention it already, what is not mentioned so far is the Tox module, a tool for testing that your package installs correctly with different Python versions.
Although I usually do not have version conflicts, I like to have virtualenv to set up a clean environment and get a clear view of my packages dependencies. That way I never forget any dependencies in my setup.py
If you go for MacPorts be aware that multiple versions of the same package are not selected anymore like the old Debian style with an extra python_select package (it is still there for compatibility). Now you have the select command to choose which Python version will be used (you can even select the Apple installed ones):
$ port select python
Available versions for python:
none
python25-apple
python26-apple
python27 (active)
python27-apple
python32
$ port select python python32
Add tox on top of it and your programs should be really portable
For anyone coming to this that wants a linq-less way to get an element from a dictionary
var d = new Dictionary<string, string>();
d.Add("a", "b");
var e = d.GetEnumerator();
e.MoveNext();
var anElement = e.Current;
// anElement/e.Current is a KeyValuePair<string,string>
// where Key = "a", Value = "b"
I'm not sure if this is implementation specific, but if your Dictionary doesn't have any elements, Current
will contain a KeyValuePair<string, string>
where both the key and value are null
.
(I looked at the logic behind linq's First
method to come up with this, and tested it via LinqPad 4
)
As said before, you code will not work the way it is. A solution to that would be using a callback function, but if you think it would carry you to a 'Callback hell', you can search for "Promisses".
A possible solution using a callback function:
//DECLARE numberofDocs OUT OF FUNCTIONS
var numberofDocs;
userModel.count({}, setNumberofDocuments); //this search all DOcuments in a Collection
if you want to search the number of documents based on a query, you can do this:
userModel.count({yourQueryGoesHere}, setNumberofDocuments);
setNumberofDocuments is a separeted function :
var setNumberofDocuments = function(err, count){
if(err) return handleError(err);
numberofDocs = count;
};
Now you can get the number of Documents anywhere with a getFunction:
function getNumberofDocs(){
return numberofDocs;
}
var number = getNumberofDocs();
In addition , you use this asynchronous function inside a synchronous one by using a callback, example:
function calculateNumberOfDoc(someParameter, setNumberofDocuments){
userModel.count({}, setNumberofDocuments); //this search all DOcuments in a Collection
setNumberofDocuments(true);
}
Hope it can help others. :)
I had this challenge when working on a Rails 6 API application in Ubuntu 20.04.
I had already existing models, and I needed to generate corresponding controllers for the models and also add their allowed attributes in the controller params.
Here's how I did it:
I used the rails generate scaffold_controller
to get it done.
I simply ran the following commands:
rails generate scaffold_controller School name:string logo:json motto:text address:text
rails generate scaffold_controller Program name:string logo:json school:references
This generated the corresponding controllers for the models and also added their allowed attributes in the controller params, including the foreign key attributes.
create app/controllers/schools_controller.rb
invoke test_unit
create test/controllers/schools_controller_test.rb
create app/controllers/programs_controller.rb
invoke test_unit
create test/controllers/programs_controller_test.rb
That's all.
I hope this helps
npm build
no longer exists. You must call npm run build
now. More info below.
npm install
: installs dependencies, then calls the install
from the package.json
scripts
field.
npm run build
: runs the build field from the package.json
scripts
field.
https://docs.npmjs.com/misc/scripts
There are many things you can put into the npm package.json
scripts field. Check out the documentation link above more above the lifecycle of the scripts - most have pre and post hooks that you can run scripts before/after install, publish, uninstall, test, start, stop, shrinkwrap, version.
npm install
is not the same as npm run install
npm install
installs package.json
dependencies, then runs the package.json
scripts.install
npm run install
after dependencies are installed.npm run install
only runs the package.json
scripts.install
, it will not install dependencies.npm build
used to be a valid command (used to be the same as npm run build
) but it no longer is; it is now an internal command. If you run it you'll get: npm WARN build npm build called with no arguments. Did you mean to npm run-script build?
You can read more on the documentation: https://docs.npmjs.com/cli/buildThere are still two top level commands that will run scripts, they are:
npm start
which is the same as npm run start
npm test
==> npm run test
nltk have its pre-trained tokenizer models. Model is downloading from internally predefined web sources and stored at path of installed nltk package while executing following possible function calls.
E.g. 1 tokenizer = nltk.data.load('nltk:tokenizers/punkt/english.pickle')
E.g. 2 nltk.download('punkt')
If you call above sentence in your code, Make sure you have internet connection without any firewall protections.
I would like to share some more better alter-net way to resolve above issue with more better deep understandings.
Please follow following steps and enjoy english word tokenization using nltk.
Step 1: First download the "english.pickle" model following web path.
Goto link "http://www.nltk.org/nltk_data/" and click on "download" at option "107. Punkt Tokenizer Models"
Step 2: Extract the downloaded "punkt.zip" file and find the "english.pickle" file from it and place in C drive.
Step 3: copy paste following code and execute.
from nltk.data import load
from nltk.tokenize.treebank import TreebankWordTokenizer
sentences = [
"Mr. Green killed Colonel Mustard in the study with the candlestick. Mr. Green is not a very nice fellow.",
"Professor Plum has a green plant in his study.",
"Miss Scarlett watered Professor Plum's green plant while he was away from his office last week."
]
tokenizer = load('file:C:/english.pickle')
treebank_word_tokenize = TreebankWordTokenizer().tokenize
wordToken = []
for sent in sentences:
subSentToken = []
for subSent in tokenizer.tokenize(sent):
subSentToken.extend([token for token in treebank_word_tokenize(subSent)])
wordToken.append(subSentToken)
for token in wordToken:
print token
Let me know, if you face any problem
Note that the result of dereferencing an std::map::iterator is an std::pair. The values of first
and second
are not functions, they are variables.
Change:
iter->first()
to
iter->first
Ditto with iter->second
.
Not a big deal, but most regex engines support the POSIX character classes, and there's [:xdigit:]
for matching hex characters, which is simpler than the common 0-9a-fA-F
stuff.
So, the regex as requested (ie. with optional 0x
) is: /(0x)?[[:xdigit:]]+/
Issue is with remote server, can you login to the remote server and check if "scp" works
probable causes: - scp is not in path - openssh client not installed correctly
for more details http://www.linuxquestions.org/questions/linux-newbie-8/bash-scp-command-not-found-920513/
This is an alternative answer for the case where tqdm_notebook doesn't work for you.
from time import sleep
from tqdm import tqdm
values = range(3)
with tqdm(total=len(values)) as pbar:
for i in values:
pbar.write('processed: %d' %i)
pbar.update(1)
sleep(1)
The output would look something like this (progress would show up red):
0%| | 0/3 [00:00<?, ?it/s]
processed: 1
67%|¦¦¦¦¦¦? | 2/3 [00:01<00:00, 1.99it/s]
processed: 2
100%|¦¦¦¦¦¦¦¦¦¦| 3/3 [00:02<00:00, 1.53it/s]
processed: 3
The problem is that the output to stdout and stderr are processed asynchronously and separately in terms of new lines.
If say Jupyter receives on stderr the first line and then the "processed" output on stdout. Then once it receives an output on stderr to update the progress, it wouldn't go back and update the first line as it would only update the last line. Instead it will have to write a new line.
One workaround would be to output both to stdout instead:
import sys
from time import sleep
from tqdm import tqdm
values = range(3)
with tqdm(total=len(values), file=sys.stdout) as pbar:
for i in values:
pbar.write('processed: %d' % (1 + i))
pbar.update(1)
sleep(1)
The output will change to (no more red):
processed: 1 | 0/3 [00:00<?, ?it/s]
processed: 2 | 0/3 [00:00<?, ?it/s]
processed: 3 | 2/3 [00:01<00:00, 1.99it/s]
100%|¦¦¦¦¦¦¦¦¦¦| 3/3 [00:02<00:00, 1.53it/s]
Here we can see that Jupyter doesn't seem to clear until the end of the line. We could add another workaround for that by adding spaces. Such as:
import sys
from time import sleep
from tqdm import tqdm
values = range(3)
with tqdm(total=len(values), file=sys.stdout) as pbar:
for i in values:
pbar.write('processed: %d%s' % (1 + i, ' ' * 50))
pbar.update(1)
sleep(1)
Which gives us:
processed: 1
processed: 2
processed: 3
100%|¦¦¦¦¦¦¦¦¦¦| 3/3 [00:02<00:00, 1.53it/s]
It might in general be more straight forward not to have two outputs but update the description instead, e.g.:
import sys
from time import sleep
from tqdm import tqdm
values = range(3)
with tqdm(total=len(values), file=sys.stdout) as pbar:
for i in values:
pbar.set_description('processed: %d' % (1 + i))
pbar.update(1)
sleep(1)
With the output (description updated while it's processing):
processed: 3: 100%|¦¦¦¦¦¦¦¦¦¦| 3/3 [00:02<00:00, 1.53it/s]
You can mostly get it to work fine with plain tqdm. But if tqdm_notebook works for you, just use that (but then you'd probably not read that far).
/var/www/html
is just the default root folder of the web server. You can change that to be whatever folder you want by editing your apache.conf
file (usually located in /etc/apache/conf
) and changing the DocumentRoot
attribute (see http://httpd.apache.org/docs/current/mod/core.html#documentroot for info on that)
Many hosts don't let you change these things yourself, so your mileage may vary. Some let you change them, but only with the built in admin tools (cPanel, for example) instead of via a command line or editing the raw config files.
You have to pass the arguments in the terminal in order to store them in 'argv'. This variable holds the arguments you pass to your Python script when you run it. It later unpacks the arguments and store them in different variables you specify in the program e.g.
script, first, second = argv
print "Your file is:", script
print "Your first entry is:", first
print "Your second entry is:" second
Then in your command line you have to run your code like this,
$python ex14.py Hamburger Pizza
Your output will look like this:
Your file is: ex14.py
Your first entry is: Hamburger
Your second entry is: Pizza
For those who would like to do this using a single function inside the IF statement, I use
=IF(COUNTIF(A1,"*TEXT*"),TrueValue,FalseValue)
to see if the substring TEXT is in cell A1
[NOTE: TEXT needs to have asterisks around it]
Yes, you can.
From cplusplus.com:
Because these functions are operator overloading functions, the usual way in which they are called is:
strm >> variable;
Where
strm
is the identifier of a istream object andvariable
is an object of any type supported as right parameter. It is also possible to call a succession of extraction operations as:strm >> variable1 >> variable2 >> variable3; //...
which is the same as performing successive extractions from the same object
strm
.
Just replace strm
with cin
.
Chaining with the query builder interface in Mongoose 4.
// Build up a query using chaining syntax. Since no callback is passed this will create an instance of Query.
var query = Person.
find({ occupation: /host/ }).
where('name.last').equals('Ghost'). // find each Person with a last name matching 'Ghost'
where('age').gt(17).lt(66).
where('likes').in(['vaporizing', 'talking']).
limit(10).
sort('-occupation'). // sort by occupation in decreasing order
select('name occupation'); // selecting the `name` and `occupation` fields
// Excute the query at a later time.
query.exec(function (err, person) {
if (err) return handleError(err);
console.log('%s %s is a %s.', person.name.first, person.name.last, person.occupation) // Space Ghost is a talk show host
})
See the docs for more about queries.
You put the declaration in a header file, e.g.
extern int my_global;
In one of your .c files you define it at global scope.
int my_global;
Every .c file that wants access to my_global
includes the header file with the extern
in.
While the accepted answer isn't technically wrong, it doesn't answer the original question nor the follow up question in the comments, which was what I came here looking for. But I figured it out, so here goes.
If you want to find all Posts that have Users (and only the ones that have users) where the SQL would look like this:
SELECT * FROM posts INNER JOIN users ON posts.user_id = users.id
Which is semantically the same thing as the OP's original SQL:
SELECT * FROM posts, users WHERE posts.user_id = users.id
then this is what you want:
Posts.findAll({
include: [{
model: User,
required: true
}]
}).then(posts => {
/* ... */
});
Setting required to true is the key to producing an inner join. If you want a left outer join (where you get all Posts, regardless of whether there's a user linked) then change required to false, or leave it off since that's the default:
Posts.findAll({
include: [{
model: User,
// required: false
}]
}).then(posts => {
/* ... */
});
If you want to find all Posts belonging to users whose birth year is in 1984, you'd want:
Posts.findAll({
include: [{
model: User,
where: {year_birth: 1984}
}]
}).then(posts => {
/* ... */
});
Note that required is true by default as soon as you add a where clause in.
If you want all Posts, regardless of whether there's a user attached but if there is a user then only the ones born in 1984, then add the required field back in:
Posts.findAll({
include: [{
model: User,
where: {year_birth: 1984}
required: false,
}]
}).then(posts => {
/* ... */
});
If you want all Posts where the name is "Sunshine" and only if it belongs to a user that was born in 1984, you'd do this:
Posts.findAll({
where: {name: "Sunshine"},
include: [{
model: User,
where: {year_birth: 1984}
}]
}).then(posts => {
/* ... */
});
If you want all Posts where the name is "Sunshine" and only if it belongs to a user that was born in the same year that matches the post_year attribute on the post, you'd do this:
Posts.findAll({
where: {name: "Sunshine"},
include: [{
model: User,
where: ["year_birth = post_year"]
}]
}).then(posts => {
/* ... */
});
I know, it doesn't make sense that somebody would make a post the year they were born, but it's just an example - go with it. :)
I figured this out (mostly) from this doc:
Please put this code in head section
<link href='http://fonts.googleapis.com/css?family=Lato:400,700' rel='stylesheet' type='text/css'>
and use font-family: 'Lato', sans-serif;
in your css. For example:
h1 {
font-family: 'Lato', sans-serif;
font-weight: 400;
}
Or you can use manually also
Generate .ttf
font from fontSquiral
and can try this option
@font-face {
font-family: "Lato";
src: url('698242188-Lato-Bla.eot');
src: url('698242188-Lato-Bla.eot?#iefix') format('embedded-opentype'),
url('698242188-Lato-Bla.svg#Lato Black') format('svg'),
url('698242188-Lato-Bla.woff') format('woff'),
url('698242188-Lato-Bla.ttf') format('truetype');
font-weight: normal;
font-style: normal;
}
Called like this
body {
font-family: 'Lato', sans-serif;
}
Assuming not null longVal
Integer intVal = ((Number)longVal).intValue();
It works for example y you get an Object that can be an Integer or a Long. I know that is ugly, but it happens...
<?php
$content='<table width="100%" border="1">';
$content.='<tr><th>name</th><th>email</th><th>contact</th><th>address</th><th>city</th><th>country</th><th>postcode</th></tr>';
for ($index = 0; $index < 10; $index++) {
$content.='<tr><td>nadim</td><td>[email protected]</td><td>7737033665</td><td>247 dehligate</td><td>udaipur</td><td>india</td><td>313001</td></tr>';
}
$content.='</table>';
//$html = file_get_contents('pdf.php');
if(isset($_POST['pdf'])){
require_once('./dompdf/dompdf_config.inc.php');
$dompdf = new DOMPDF;
$dompdf->load_html($content);
$dompdf->render();
$dompdf->stream("hello.pdf");
}
?>
<html>
<body>
<form action="#" method="post">
<button name="pdf" type="submit">export</button>
<table width="100%" border="1">
<tr><th>name</th><th>email</th><th>contact</th><th>address</th><th>city</th><th>country</th><th>postcode</th></tr>
<?php for ($index = 0; $index < 10; $index++) { ?>
<tr><td>nadim</td><td>[email protected]</td><td>7737033665</td><td>247 dehligate</td><td>udaipur</td><td>india</td><td>313001</td></tr>
<?php } ?>
</table>
</form>
</body>
</html>
function resize() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
render();
}
window.addEventListener('resize', resize, false); resize();
function render() { // draw to screen here
}