There is a package on npm for easy asynchronous for each loops.
var forEachAsync = require('futures').forEachAsync;
// waits for one request to finish before beginning the next
forEachAsync(['dogs', 'cats', 'octocats'], function (next, element, index, array) {
getPics(element, next);
// then after all of the elements have been handled
// the final callback fires to let you know it's all done
}).then(function () {
console.log('All requests have finished');
});
Also another variation forAllAsync
You need both a value and a field to assign it to. The value is TableField + 1
, so the assignment is:
SET TableField = TableField + 1
The following solution does not use inline blocks. However, it requires two helper divs:
.ca-outer {_x000D_
overflow: hidden;_x000D_
background: #FFC;_x000D_
}_x000D_
.ca-inner {_x000D_
float: left;_x000D_
position: relative;_x000D_
left: 50%;_x000D_
background: #FDD;_x000D_
}_x000D_
.content {_x000D_
float: left;_x000D_
position: relative;_x000D_
left: -50%;_x000D_
background: #080;_x000D_
}_x000D_
/* examples */_x000D_
div.content > div {_x000D_
float: left;_x000D_
margin: 10px;_x000D_
width: 100px;_x000D_
height: 100px;_x000D_
background: #FFF;_x000D_
}_x000D_
ul.content {_x000D_
padding: 0;_x000D_
list-style-type: none;_x000D_
}_x000D_
ul.content > li {_x000D_
margin: 10px;_x000D_
background: #FFF;_x000D_
}
_x000D_
<div class="ca-outer">_x000D_
<div class="ca-inner">_x000D_
<div class="content">_x000D_
<div>Box 1</div>_x000D_
<div>Box 2</div>_x000D_
<div>Box 3</div>_x000D_
</div>_x000D_
</div>_x000D_
</div>_x000D_
<hr>_x000D_
<div class="ca-outer">_x000D_
<div class="ca-inner">_x000D_
<ul class="content">_x000D_
<li>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</li>_x000D_
<li>Nullam efficitur nulla in libero consectetur dictum ac a sem.</li>_x000D_
<li>Suspendisse iaculis risus ut dapibus cursus.</li>_x000D_
</ul>_x000D_
</div>_x000D_
</div>
_x000D_
You can't verify (with enough accuracy to rely on) if an email actually exists using just a single PHP method. You can send an email to that account, but even that alone won't verify the account exists (see below). You can, at least, verify it's at least formatted like one
if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
//Email is valid
}
You can add another check if you want. Parse the domain out and then run checkdnsrr
if(checkdnsrr($domain)) {
// Domain at least has an MX record, necessary to receive email
}
Many people get to this point and are still unconvinced there's not some hidden method out there. Here are some notes for you to consider if you're bound and determined to validate email:
Spammers also know the "connection trick" (where you start to send an email and rely on the server to bounce back at that point). One of the other answers links to this library which has this caveat
Some mail servers will silently reject the test message, to prevent spammers from checking against their users' emails and filter the valid emails, so this function might not work properly with all mail servers.
In other words, if there's an invalid address you might not get an invalid address response. In fact, virtually all mail servers come with an option to accept all incoming mail (here's how to do it with Postfix). The answer linking to the validation library neglects to mention that caveat.
Spam blacklists. They blacklist by IP address and if your server is constantly doing verification connections you run the risk of winding up on Spamhaus or another block list. If you get blacklisted, what good does it do you to validate the email address?
If it's really that important to verify an email address, the accepted way is to force the user to respond to an email. Send them a full email with a link they have to click to be verified. It's not spammy, and you're guaranteed that any responses have a valid address.
plt.imshow
just finishes drawing a picture instead of printing it. If you want to print the picture, you just need to add plt.show
.
You need to start the SQL Server manually. Press
windows + R
type
sqlservermanager12.msc
right click ->Start
Corrected as of 25.06.2019:
var newDate = new Date(date.setMonth(date.getMonth()+8));
Old From here:
var jan312009 = new Date(2009, 0, 31);
var eightMonthsFromJan312009 = jan312009.setMonth(jan312009.getMonth()+8);
There is really no limit on the size of JSON data to be send or receive. We can send Json data in file too. According to the capabilities of browser that you are working with, Json data can be handled.
Should it be LIBRARY_PATH
instead of LD_LIBRARY_PATH
.
gcc checks for LIBRARY_PATH
which can be seen with -v
option
I have written the following method using this case.
First, add the namespace: System.Reflection
For Example: T
is return type(ClassName) and dr
is parameter to mapping DataReader
C#, Call mapping method like the following:
List<Person> personList = new List<Person>();
personList = DataReaderMapToList<Person>(dataReaderForPerson);
This is the mapping method:
public static List<T> DataReaderMapToList<T>(IDataReader dr)
{
List<T> list = new List<T>();
T obj = default(T);
while (dr.Read()) {
obj = Activator.CreateInstance<T>();
foreach (PropertyInfo prop in obj.GetType().GetProperties()) {
if (!object.Equals(dr[prop.Name], DBNull.Value)) {
prop.SetValue(obj, dr[prop.Name], null);
}
}
list.Add(obj);
}
return list;
}
VB.NET, Call mapping method like the following:
Dim personList As New List(Of Person)
personList = DataReaderMapToList(Of Person)(dataReaderForPerson)
This is the mapping method:
Public Shared Function DataReaderMapToList(Of T)(ByVal dr As IDataReader) As List(Of T)
Dim list As New List(Of T)
Dim obj As T
While dr.Read()
obj = Activator.CreateInstance(Of T)()
For Each prop As PropertyInfo In obj.GetType().GetProperties()
If Not Object.Equals(dr(prop.Name), DBNull.Value) Then
prop.SetValue(obj, dr(prop.Name), Nothing)
End If
Next
list.Add(obj)
End While
Return list
End Function
http://www.w3.org/TR/CSS21/visuren.html#z-index
'z-index'
Value: auto | <integer> | inherit
http://www.w3.org/TR/CSS21/syndata.html#numbers
Some value types may have integer values (denoted by <integer>) or real number values (denoted by <number>). Real numbers and integers are specified in decimal notation only. An <integer> consists of one or more digits "0" to "9". A <number> can either be an <integer>, or it can be zero or more digits followed by a dot (.) followed by one or more digits. Both integers and real numbers may be preceded by a "-" or "+" to indicate the sign. -0 is equivalent to 0 and is not a negative number.
Note that many properties that allow an integer or real number as a value actually restrict the value to some range, often to a non-negative value.
So basically there are no limitations for z-index value in the CSS standard, but I guess most browsers limit it to signed 32-bit values (-2147483648 to +2147483647) in practice (64 would be a little off the top, and it doesn't make sense to use anything less than 32 bits these days)
Another reason to use merge is when using custom viewgroups in ListViews or GridViews. Instead of using the viewHolder pattern in a list adapter, you can use a custom view. The custom view would inflate an xml whose root is a merge tag. Code for adapter:
public class GridViewAdapter extends BaseAdapter {
// ... typical Adapter class methods
@Override
public View getView(int position, View convertView, ViewGroup parent) {
WallpaperView wallpaperView;
if (convertView == null)
wallpaperView = new WallpaperView(activity);
else
wallpaperView = (WallpaperView) convertView;
wallpaperView.loadWallpaper(wallpapers.get(position), imageWidth);
return wallpaperView;
}
}
here is the custom viewgroup:
public class WallpaperView extends RelativeLayout {
public WallpaperView(Context context) {
super(context);
init(context);
}
// ... typical constructors
private void init(Context context) {
View.inflate(context, R.layout.wallpaper_item, this);
imageLoader = AppController.getInstance().getImageLoader();
imagePlaceHolder = (ImageView) findViewById(R.id.imgLoader2);
thumbnail = (NetworkImageView) findViewById(R.id.thumbnail2);
thumbnail.setScaleType(ImageView.ScaleType.CENTER_CROP);
}
public void loadWallpaper(Wallpaper wallpaper, int imageWidth) {
// ...some logic that sets the views
}
}
and here is the XML:
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:id="@+id/imgLoader"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_centerInParent="true"
android:src="@drawable/ico_loader" />
<com.android.volley.toolbox.NetworkImageView
android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</merge>
It's a one liner actually. No need to use .Autofill
Range("M3:M" & LastRow).Formula = "=G3&"",""&L3"
Try to Use Flex as that is the new standard of html5.
http://jsfiddle.net/maxspan/1b431hxm/
<div id="row1">
<div id="column1">I am column one</div>
<div id="column2">I am column two</div>
</div>
#row1{
display:flex;
flex-direction:row;
justify-content: space-around;
}
#column1{
display:flex;
flex-direction:column;
}
#column2{
display:flex;
flex-direction:column;
}
Using a char when the variable is a string won't work. Using
switch (hello.charAt(0))
you will extract the first character of the hello variable instead of trying to use the variable as it is, in string form. You also need to get rid of your space inside
case 'a '
You could use something like this
var el = document.createElement("svg");
el.style.width="600px";
el.style.height="100px";
....
iElement[0].appendChild(el)
I added some fixes to @jessegavin's fix.
This will return right away if there is an ID on the element. I also added a name attribute check and a nth-child selector in case a element has no id, class, or name.
The name might need scoping in case there a multiple forms on the page and have similar inputs, but I didn't handle that yet.
function getSelector(el){
var $el = $(el);
var id = $el.attr("id");
if (id) { //"should" only be one of these if theres an ID
return "#"+ id;
}
var selector = $el.parents()
.map(function() { return this.tagName; })
.get().reverse().join(" ");
if (selector) {
selector += " "+ $el[0].nodeName;
}
var classNames = $el.attr("class");
if (classNames) {
selector += "." + $.trim(classNames).replace(/\s/gi, ".");
}
var name = $el.attr('name');
if (name) {
selector += "[name='" + name + "']";
}
if (!name){
var index = $el.index();
if (index) {
index = index + 1;
selector += ":nth-child(" + index + ")";
}
}
return selector;
}
Given below is a simple way to find exactly where in the list the item is.
for i in range (0,len(a)):
sublist=a[i]
for i in range(0,len(sublist)):
if search==sublist[i]:
print "found in sublist "+ "a"+str(i)
If you really want one line per user, you can group by grantee (require PG9+ for string_agg)
SELECT grantee, string_agg(privilege_type, ', ') AS privileges
FROM information_schema.role_table_grants
WHERE table_name='mytable'
GROUP BY grantee;
This should output something like :
grantee | privileges
---------+----------------
user1 | INSERT, SELECT
user2 | UPDATE
(2 rows)
you can use the some Codeigniter functions and some core functions and make combination to achieve your URL with query string. I found solution of this problem.
base_url($this->uri->uri_string()).strrchr($_SERVER['REQUEST_URI'], "?");
and if you loaded URL helper so you can also do this current_url().strrchr($_SERVER['REQUEST_URI'], "?");
There is an article on javaworld.com that explains the difference => Which ClassLoader should you use
(1)
Thread context classloaders provide a back door around the classloading delegation scheme.
Take JNDI for instance: its guts are implemented by bootstrap classes in rt.jar (starting with J2SE 1.3), but these core JNDI classes may load JNDI providers implemented by independent vendors and potentially deployed in the application's -classpath. This scenario calls for a parent classloader (the primordial one in this case) to load a class visible to one of its child classloaders (the system one, for example). Normal J2SE delegation does not work, and the workaround is to make the core JNDI classes use thread context loaders, thus effectively "tunneling" through the classloader hierarchy in the direction opposite to the proper delegation.
(2) from the same source:
This confusion will probably stay with Java for some time. Take any J2SE API with dynamic resource loading of any kind and try to guess which loading strategy it uses. Here is a sampling:
- JNDI uses context classloaders
- Class.getResource() and Class.forName() use the current classloader
- JAXP uses context classloaders (as of J2SE 1.4)
- java.util.ResourceBundle uses the caller's current classloader
- URL protocol handlers specified via java.protocol.handler.pkgs system property are looked up in the bootstrap and system classloaders only
- Java Serialization API uses the caller's current classloader by default
I found several functions defined in http://tw1.php.net/unpack are very useful.
They can covert string to byte array and vice versa.
Take byteStr2byteArray() as an example:
<?php
function byteStr2byteArray($s) {
return array_slice(unpack("C*", "\0".$s), 1);
}
$msg = "abcdefghijk";
$byte_array = byteStr2byteArray($msg);
for($i=0;$i<count($byte_array);$i++)
{
printf("0x%02x ", $byte_array[$i]);
}
?>
I figured it out. Basically it's an async issue. You can't just submit and expect to render the subsequent page immediately. You have to wait until the onLoad event for the next page is triggered. My code is below:
var page = new WebPage(), testindex = 0, loadInProgress = false;
page.onConsoleMessage = function(msg) {
console.log(msg);
};
page.onLoadStarted = function() {
loadInProgress = true;
console.log("load started");
};
page.onLoadFinished = function() {
loadInProgress = false;
console.log("load finished");
};
var steps = [
function() {
//Load Login Page
page.open("https://website.com/theformpage/");
},
function() {
//Enter Credentials
page.evaluate(function() {
var arr = document.getElementsByClassName("login-form");
var i;
for (i=0; i < arr.length; i++) {
if (arr[i].getAttribute('method') == "POST") {
arr[i].elements["email"].value="mylogin";
arr[i].elements["password"].value="mypassword";
return;
}
}
});
},
function() {
//Login
page.evaluate(function() {
var arr = document.getElementsByClassName("login-form");
var i;
for (i=0; i < arr.length; i++) {
if (arr[i].getAttribute('method') == "POST") {
arr[i].submit();
return;
}
}
});
},
function() {
// Output content of page to stdout after form has been submitted
page.evaluate(function() {
console.log(document.querySelectorAll('html')[0].outerHTML);
});
}
];
interval = setInterval(function() {
if (!loadInProgress && typeof steps[testindex] == "function") {
console.log("step " + (testindex + 1));
steps[testindex]();
testindex++;
}
if (typeof steps[testindex] != "function") {
console.log("test complete!");
phantom.exit();
}
}, 50);
Assuming you're asking for WinForms, you may use the FormClosing() event. The event FormClosing() is triggered any time a form is to get closed.
To detect if the user clicked either X or your CloseButton, you may get it through the sender object. Try to cast sender as a Button control, and verify perhaps for its name "CloseButton", for instance.
private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
if (string.Equals((sender as Button).Name, @"CloseButton"))
// Do something proper to CloseButton.
else
// Then assume that X has been clicked and act accordingly.
}
Otherwise, I have never ever needed to differentiate whether X or CloseButton was clicked, as I wanted to perform something specific on the FormClosing event, like closing all MdiChildren before closing the MDIContainerForm, or event checking for unsaved changes. Under these circumstances, we don't need, according to me, to differentiate from either buttons.
Closing by ALT+F4 will also trigger the FormClosing() event, as it sends a message to the Form that says to close. You may cancel the event by setting the
FormClosingEventArgs.Cancel = true.
In our example, this would translate to be
e.Cancel = true.
Notice the difference between the FormClosing() and the FormClosed() events.
FormClosing occurs when the form received the message to be closed, and verify whether it has something to do before it is closed.
FormClosed occurs when the form is actually closed, so after it is closed.
Does this help?
mklement0's answer is great, but I have some small tweaks.
It seems like a good idea to explicitly specify bash
's encoding when using iconv
. Also, we should prepend a byte-order mark (even though the unicode standard doesn't recommend it) because there can be legitimate confusions between UTF-8 and ASCII without a byte-order mark. Unfortunately, iconv
doesn't prepend a byte-order mark when you explicitly specify an endianness (UTF-16BE
or UTF-16LE
), so we need to use UTF-16
, which uses platform-specific endianness, and then use file --mime-encoding
to discover the true endianness iconv
used.
(I uppercase all my encodings because when you list all of iconv
's supported encodings with iconv -l
they are all uppercase.)
# Find out MY_FILE's encoding
# We'll convert back to this at the end
FILE_ENCODING="$( file --brief --mime-encoding MY_FILE )"
# Find out bash's encoding, with which we should encode
# MY_FILE so sed doesn't fail with
# sed: RE error: illegal byte sequence
BASH_ENCODING="$( locale charmap | tr [:lower:] [:upper:] )"
# Convert to UTF-16 (unknown endianness) so iconv ensures
# we have a byte-order mark
iconv -f "$FILE_ENCODING" -t UTF-16 MY_FILE > MY_FILE.utf16_encoding
# Whether we're using UTF-16BE or UTF-16LE
UTF16_ENCODING="$( file --brief --mime-encoding MY_FILE.utf16_encoding )"
# Now we can use MY_FILE.bash_encoding with sed
iconv -f "$UTF16_ENCODING" -t "$BASH_ENCODING" MY_FILE.utf16_encoding > MY_FILE.bash_encoding
# sed!
sed 's/.*/&/' MY_FILE.bash_encoding > MY_FILE_SEDDED.bash_encoding
# now convert MY_FILE_SEDDED.bash_encoding back to its original encoding
iconv -f "$BASH_ENCODING" -t "$FILE_ENCODING" MY_FILE_SEDDED.bash_encoding > MY_FILE_SEDDED
# Now MY_FILE_SEDDED has been processed by sed, and is in the same encoding as MY_FILE
You cal also do this
SELECT SUM(amnt) `value`,DATE_FORMAT(dtrg,'%m-%y') AS label FROM rentpay GROUP BY YEAR(dtrg) DESC, MONTH(dtrg) DESC LIMIT 12
to order by year and month. Lets say you want to order from this year and this month all the way back to 12 month
If you want to make sure that the string is neither red, green nor blue, caskey's answer is it. What is often wanted, however, is to make sure that the line does not contain red, green or blue anywhere in it. For that, anchor the regular expression with ^
and include .*
in the negative lookahead:
^(?!.*(red|green|blue))
Also, suppose that you want lines containing the word "engine" but without any of those colors:
^(?!.*(red|green|blue)).*engine
You might think you can factor the .*
to the head of the regular expression:
^.*(?!red|green|blue)engine # Does not work
but you cannot. You have to have both instances of .*
for it to work.
Double.parseDouble(p.replace(',','.'))
...is very quick as it searches the underlying character array on a char-by-char basis. The string replace versions compile a RegEx to evaluate.
Basically replace(char,char) is about 10 times quicker and since you'll be doing these kind of things in low-level code it makes sense to think about this. The Hot Spot optimiser will not figure it out... Certainly doesn't on my system.
Simply saying, Java context means Java native
methods all together.
In next Java code two lines of code needs context: // (1)
and // (2)
import java.io.*;
public class Runner{
public static void main(String[] args) throws IOException { // (1)
File file = new File("D:/text.txt");
String text = "";
BufferedReader reader = new BufferedReader(new FileReader(file));
String line;
while ((line = reader.readLine()) != null){ // (2)
text += line;
}
System.out.println(text);
}
}
(1) needs context because is invoked by Java native method private native void java.lang.Thread.start0();
(2) reader.readLine()
needs context because invokes Java native method public static native void java.lang.System.arraycopy(Object src, int srcPos, Object dest, int destPos, int length);
PS.
That is what BalusC is sayed about pattern Facade more strictly.
It is also possible to use http proxy to monitor http requests from emulator. You can pass -http-proxy
flag when starting a new emulator to set proxy (Example burp) to monitor Android traffic. Example usage ./emulator -http-proxy localhost:8080 -avd android2.2
. Note that in my example I'm using Burp, and it is listening port 8080. More info can be found here.
press Run and wait, if it says
"Device is not ready. Waiting for 20 sec."
press Run again. now it works :)
Replace the driver php5-mysql by the native driver
On debian
apt-get install php5-mysqlnd
I found a way to use sc.
sc config binPath= "\"c:\path with spaces in it\service_executable.exe\" "
In other words, use \ to escape any "'s you want to survive the transit into the registry.
Theres an excellent tutorial on this subject at HelloAndroid regarding this very subject. Infact it was the first hit i got on google. You should try googling before asking here, as it is good practice.
Just go to your user folder, inside it there's a ".m2" folder, open it and delete the folder "repository". Go to eclipse, clean your project, then right click->Maven->Update Project .. and you are ready to go.
You could easily implement an observer (the "watch" method) on the "hash" property of "window.location" object.
Firefox has its own implementation for watching changes of object, but if you use some other implementation (such as Watch for object properties changes in JavaScript) - for other browsers, that will do the trick.
The code will look like this:
window.location.watch(
'hash',
function(id,oldVal,newVal){
console.log("the window's hash value has changed from "+oldval+" to "+newVal);
}
);
Then you can test it:
var myHashLink = "home";
window.location = window.location + "#" + myHashLink;
And of course that will trigger your observer function.
BlobBuilder and ArrayBuffer are now deprecated, here is the top comment's code updated with Blob constructor:
function dataURItoBlob(dataURI) {
var binary = atob(dataURI.split(',')[1]);
var array = [];
for(var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i));
}
return new Blob([new Uint8Array(array)], {type: 'image/jpeg'});
}
Thanks a lot guys for your quick comments.
This is what i will be using now. Posting the function here so that somebody may use it.
public function getDayOfWeek($pTimezone)
{
$userDateTimeZone = new DateTimeZone($pTimezone);
$UserDateTime = new DateTime("now", $userDateTimeZone);
$offsetSeconds = $UserDateTime->getOffset();
//echo $offsetSeconds;
return gmdate("l", time() + $offsetSeconds);
}
Report if you find any corrections.
I had the same problem, needed a modification of [Required] attribute - make field required in dependence of http request.The solution was similar to Dan Hunex answer, but his solution didn't work correctly (see comments). I don't use unobtrusive validation, just MicrosoftMvcValidation.js out of the box. Here it is. Implement your custom attribute:
public class RequiredIfAttribute : RequiredAttribute
{
public RequiredIfAttribute(/*You can put here pararmeters if You need, as seen in other answers of this topic*/)
{
}
protected override ValidationResult IsValid(object value, ValidationContext context)
{
//You can put your logic here
return ValidationResult.Success;//I don't need its server-side so it always valid on server but you can do what you need
}
}
Then you need to implement your custom provider to use it as an adapter in your global.asax
public class RequreIfValidator : DataAnnotationsModelValidator <RequiredIfAttribute>
{
ControllerContext ccontext;
public RequreIfValidator(ModelMetadata metadata, ControllerContext context, RequiredIfAttribute attribute)
: base(metadata, context, attribute)
{
ccontext = context;// I need only http request
}
//override it for custom client-side validation
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
//here you can customize it as you want
ModelClientValidationRule rule = new ModelClientValidationRule()
{
ErrorMessage = ErrorMessage,
//and here is what i need on client side - if you want to make field required on client side just make ValidationType "required"
ValidationType =(ccontext.HttpContext.Request["extOperation"] == "2") ? "required" : "none";
};
return new ModelClientValidationRule[] { rule };
}
}
And modify your global.asax with a line
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(RequiredIfAttribute), typeof(RequreIfValidator));
and here it is
[RequiredIf]
public string NomenclatureId { get; set; }
The main advantage for me is that I don't have to code custom client validator as in case of unobtrusive validation. it works just as [Required], but only in cases that you want.
As others mention, it's a child selector. Here's the appropriate link.
It's also cleaner to use @JoinTable
when an Entity could be the child in several parent/child relationships with different types of parents. To follow up with Behrang's example, imagine a Task can be the child of Project, Person, Department, Study, and Process.
Should the task
table have 5 nullable
foreign key fields? I think not...
git grep
Here is the syntax using git grep
with multiple patterns:
git grep --all-match --no-index -l -e string1 -e string2 -e string3 file
You may also combine patterns with Boolean expressions such as --and
, --or
and --not
.
Check man git-grep
for help.
--all-match
When giving multiple pattern expressions, this flag is specified to limit the match to files that have lines to match all of them.
--no-index
Search files in the current directory that is not managed by Git.
-l
/--files-with-matches
/--name-only
Show only the names of files.
-e
The next parameter is the pattern. Default is to use basic regexp.
Other params to consider:
--threads
Number of grep worker threads to use.
-q
/--quiet
/--silent
Do not output matched lines; exit with status 0 when there is a match.
To change the pattern type, you may also use -G
/--basic-regexp
(default), -F
/--fixed-strings
, -E
/--extended-regexp
, -P
/--perl-regexp
, -f file
, and other.
Related:
For OR operation, see:
I have resolved this Gradle caching issue like below.
In case anyone using MacBook then below is the steps I used to resolve this issue.
shortcut (? + shift + G)
then enter this inside popup window ~/.gradle/
press enter
file to be removed -> gradle.properties
Try this css
.clearfix:before, .clearfix:after, .container:before, .container:after, .container-fluid:before, .container-fluid:after, .row:before, .row:after, .form-horizontal .form-group:before, .form-horizontal .form-group:after, .btn-toolbar:before, .btn-toolbar:after, .btn-group-vertical > .btn-group:before, .btn-group-vertical > .btn-group:after, .nav:before, .nav:after, .navbar:before, .navbar:after, .navbar-header:before, .navbar-header:after, .navbar-collapse:before, .navbar-collapse:after, .pager:before, .pager:after, .panel-body:before, .panel-body:after, .modal-footer:before, .modal-footer:after {
content: " ";
display: table-cell;
}
ul.nav {
float: none;
margin-bottom: 0;
margin-left: auto;
margin-right: auto;
margin-top: 0;
width: 240px;
}
A Simple way is
UPDATE tbl_name SET fild_name = value WHERE fild_name IS NULL
Make a new div with whatever name (I will just use table-split) and give it a width, without adding content to it, while placing it between necessary divs that need to be separated.
You can add whatever width you find necessary. I just used 0.6% because it's what I needed for when I had to do this.
.table-split {_x000D_
display: table-cell;_x000D_
width: 0.6%_x000D_
}
_x000D_
<div class="table-split"></div>
_x000D_
In C++ (without error checking):
std::string blob = ...; // assume blob is in the string
std::string query = "INSERT INTO foo (blob_column) VALUES (?);";
sqlite3_stmt *stmt;
sqlite3_prepare_v2(db, query, query.size(), &stmt, nullptr);
sqlite3_bind_blob(stmt, 1, blob.data(), blob.size(),
SQLITE_TRANSIENT);
That can be SQLITE_STATIC
if the query will be executed before blob
gets destructed.
The stuff between the
-----BEGIN RSA PRIVATE KEY----
and
-----END RSA PRIVATE KEY-----
is the base64 encoding of a PKCS#8 PrivateKeyInfo (unless it says RSA ENCRYPTED PRIVATE KEY in which case it is a EncryptedPrivateKeyInfo).
It is not that hard to decode manually, but otherwise your best bet is to P/Invoke to CryptImportPKCS8.
Update: The CryptImportPKCS8 function is no longer available for use as of Windows Server 2008 and Windows Vista. Instead, use the PFXImportCertStore function.
Simple Answer:
Depth:
1. Tree: Number of edges/arc from the root node to the leaf node of the tree is called as the Depth of the Tree.
2. Node: Number of edges/arc from the root node to that node is called as the Depth of that node.
You can try this:
//Your class instance
Publication publication = new Publication();
//Get class with full path(with package name)
Class<?> c = Class.forName("com.example.publication.models.Publication");
//Get method
Method method = c.getDeclaredMethod ("setTitle", String.class);
//set value
method.invoke (publication, "Value to want to set here...");
If you have downloaded the latest Version 4.3.4 then just follow these steps.
Load the mentioned js file
<script type="text/javascript" src="/ckeditor/ckeditor.js"></script> <textarea class="ckeditor" name="editor"></textarea>
Yes you can sort using query method in Spring Data.
Ex:ascending order or descending order by using the value of the id field.
Code:
public interface StudentDAO extends JpaRepository<StudentEntity, Integer> {
public findAllByOrderByIdAsc();
}
alternative solution:
@Repository
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentDAO studentDao;
@Override
public List<Student> findAll() {
return studentDao.findAll(orderByIdAsc());
}
private Sort orderByIdAsc() {
return new Sort(Sort.Direction.ASC, "id")
.and(new Sort(Sort.Direction.ASC, "name"));
}
}
Spring Data Sorting: Sorting
Syntax to change column name in MySql:
alter table table_name change old_column_name new_column_name data_type(size);
Example:
alter table test change LowSal Low_Sal integer(4);
To access files in my SD card, on my HTC One X (Android), I use this path:
file:///storage/sdcard0/folder/filename.jpg
Note the tripple "/" !
u can also use simple import wavio
library u also need have some basic knowledge of the sound.
import React, { Component } from 'react'
export default class Form extends Component {
constructor(props) {
super(props)
this.formRef = React.createRef()
this.state = {
email: '',
loading: false,
eror: null
}
}
reset = () => {
this.formRef.current.reset()
}
render() {
return (
<div>
<form>
<input type="email" name="" id=""/>
<button type="submit">Submit</button>
<button onClick={()=>this.reset()}>Reset</button>
</form>
</div>
)
}
}
_x000D_
You can import these js Files. It worked fine for me.
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js" ></script>
wmic
can call an uninstaller. I haven't tried this, but I think it might work.
wmic /node:computername /user:adminuser /password:password product where name="name of application" call uninstall
If you don't know exactly what the program calls itself, do
wmic product get name | sort
and look for it. You can also uninstall using SQL-ish wildcards.
wmic /node:computername /user:adminuser /password:password product where "name like '%j2se%'" call uninstall
... for example would perform a case-insensitive search for *j2se*
and uninstall "J2SE Runtime Environment 5.0 Update 12". (Note that in the example above, %j2se%
is not an environment variable, but simply the word "j2se" with a SQL-ish wildcard on each end. If your search string could conflict with an environment or script variable, use double percents to specify literal percent signs, like %%j2se%%
.)
If wmic prompts for y/n
confirmation before completing the uninstall, try this:
echo y | wmic /node:computername /user:adminuser /password:password product where name="whatever" call uninstall
... to pass a y
to it before it even asks.
I haven't tested this, but it's worth a shot anyway. If it works on one computer, then you can just loop through a text file containing all the computer names within your organization using a for loop, or put it in a domain policy logon script.
You have the annotation in the wrong place - it needs to be on the class, not the field. i.e:
@JsonInclude(Include.NON_NULL) //or Include.NON_EMPTY, if that fits your use case
public static class Request {
// ...
}
As noted in comments, in versions below 2.x the syntax for this annotation is:
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL) // or JsonSerialize.Inclusion.NON_EMPTY
The other option is to configure the ObjectMapper
directly, simply by calling
mapper.setSerializationInclusion(Include.NON_NULL);
(for the record, I think the popularity of this answer is an indication that this annotation should be applicable on a field-by-field basis, @fasterxml)
It is generally considered bad practise to have a one to one relationship. This is because you could just have the data represented in one table and achieve the same result.
However, there are instances where you may not be able to make these changes to the table you are referencing. In this instance there is no problem using the Foreign key as the primary key. It might help to have a composite key consisting of an auto incrementing unique primary key and the foreign key.
I am currently working on a system where users can log in and generate a registration code to use with an app. For reasons I won't go into I am unable to simply add the columns required to the users table. So I am going down a one to one route with the codes table.
You shouldn't overload the templates with complex logic, it's a bad practice. Remember to always keep it simple!
The better approach would be to extract this logic into reusable function on your $rootScope
:
.run(function ($rootScope) {
$rootScope.inArray = function (item, array) {
return (-1 !== array.indexOf(item));
};
})
Then, use it in your template:
<li ng-class="{approved: inArray(jobSet, selectedForApproval)}"></li>
I think everyone will agree that this example is much more readable and maintainable.
idk if this might help you after 9 years... its a simple bubble sort program
l=[1,6,3,7,5,9,8,2,4,10]
for i in range(1,len(l)):
for j in range (i+1,len(l)):
if l[i]>l[j]:
l[i],l[j]=l[j],l[i]
my form:
<form method="post" action="radio.php">
select your gender:
<input type="radio" name="radioGender" value="female">
<input type="radio" name="radioGender" value="male">
<input type="submit" name="btnSubmit" value="submit">
</form>
my php:
<?php
if (isset($_POST["btnSubmit"])) {
if (isset($_POST["radioGender"])) {
$answer = $_POST['radioGender'];
if ($answer == "female") {
echo "female";
} else {
echo "male";
}
}else{
echo "please select your gender";
}
}
?>
For the second class file, add "package Dan;" like the first one, so as to make sure they are in the same package; modify "import Dan.Vik.disp;" to be "import Dan.Vik;"
No need for extra software. Use the task scheduler -> create task -> hidden. The checkbox for hidden is in the bottom left corner. Set the task to trigger on login (or whatever condition you like) and choose the task in the actions tab. Running it hidden ensures that the task runs silently in the background like a service.
Note that you must also set the program to run "whether the user is logged in or not" or the program will still run in the foreground.
If you can use PowerShell on Windows you just need :
Get-Process -Id (Get-NetTCPConnection -LocalPort "8080").OwningProcess | Stop-Process
You can use
ng-bind-html https://docs.angularjs.org/api/ng/service/$sce
directive to bind html dynamically. However you have to get the data via $sce service.
Please see the live demo at http://plnkr.co/edit/k4s3Bx
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope,$sce) {
$scope.getHtml=function(){
return $sce.trustAsHtml("<b>Hi Rupesh hi <u>dfdfdfdf</u>!</b>sdafsdfsdf<button>dfdfasdf</button>");
}
});
<body ng-controller="MainCtrl">
<span ng-bind-html="getHtml()"></span>
</body>
Close... try:
select
Sum(case when rsp_ind = 0 then 1 Else 0 End) as 'New',
Sum(case when rsp_ind = 1 then 1 else 0 end) as 'Accepted'
from tb_a
Try this:
Dim dataView As New DataView(table)
dataView.Sort = " AutoID DESC, Name DESC"
Dim dataTable AS DataTable = dataView.ToTable()
I have avoided this error (Java 1.6.0 on OSX 10.5.8) by putting a dummy cert in the keystore, such as
keytool -genkey -alias foo -keystore cacerts -dname cn=test -storepass changeit -keypass changeit
Surely the question should be "Why can't java handle an empty trustStore?"
Assuming that the user you are using in phpmyadmin has the necessary privileges, you can run this query to change the root password:
UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';
FLUSH PRIVILEGES;
If you want your script to return values, just do return [1,2,3]
from a function wrapping your code but then you'd have to import your script from another script to even have any use for that information:
(again, this would have to be run by a separate Python script and be imported in order to even do any good):
import ...
def main():
# calculate stuff
return [1,2,3]
(This is generally just good for when you want to indicate to a governor what went wrong or simply the number of bugs/rows counted or w/e. Normally 0 is a good exit and >=1 is a bad exit but you could inter-prate them in any way you want to get data out of it)
import sys
# calculate and stuff
sys.exit(100)
And exit with a specific exit code depending on what you want that to tell your governor. I used exit codes when running script by a scheduling and monitoring environment to indicate what has happened.
(os._exit(100)
also works, and is a bit more forceful)
If not you'd have to use stdout to communicate with the outside world (like you've described). But that's generally a bad idea unless it's a parser executing your script and can catch whatever it is you're reporting to.
import sys
# calculate stuff
sys.stdout.write('Bugs: 5|Other: 10\n')
sys.stdout.flush()
sys.exit(0)
Are you running your script in a controlled scheduling environment then exit codes are the best way to go.
There's also the option to simply write information to a file, and store the result there.
# calculate
with open('finish.txt', 'wb') as fh:
fh.write(str(5)+'\n')
And pick up the value/result from there. You could even do it in a CSV format for others to read simplistically.
If none of the above work, you can also use network sockets locally *(unix sockets is a great way on nix systems). These are a bit more intricate and deserve their own post/answer. But editing to add it here as it's a good option to communicate between processes. Especially if they should run multiple tasks and return values.
Well that could have some reasons.
THe first one is that the MySQL server/service not started.
If he is started you should check out the logfiles, and make sure there are no problems.
You could also uninstall the MySQL service and install XAMPP. With XAMPP it is easier to manage this services.
it's very simple. this is work for me.
export MYSQL_PWD=password; mysql --user=username -e "statement"
MYSQL_PWD
is one of environment variables from mysql. it's default password when connecting to mysqld.
super()
lets you avoid referring to the base class explicitly, which can be nice. But the main advantage comes with multiple inheritance, where all sorts of fun stuff can happen. See the standard docs on super if you haven't already.
Note that the syntax changed in Python 3.0: you can just say super().__init__()
instead of super(ChildB, self).__init__()
which IMO is quite a bit nicer. The standard docs also refer to a guide to using super()
which is quite explanatory.
While it's true that json
is a built-in module, I also found that on an Ubuntu system with python-minimal
installed, you DO have python
but you can't do import json
. And then I understand that you would try to install the module using pip!
If you have python-minimal
you'll get a version of python with less modules than when you'd typically compile python yourself, and one of the modules you'll be missing is the json
module. The solution is to install an additional package, called libpython2.7-stdlib
, to install all 'default' python libraries.
sudo apt install libpython2.7-stdlib
And then you can do import json
in python and it would work!
You can leave out the newline which gives you:
case 1: case 2: case 3:
break;
but I consider that bad style.
Here's a variation, using the version of fs
that uses promises:
const fs = require('fs');
await fs.promises.writeFile('../data/phraseFreqs.json', JSON.stringify(output)); // UTF-8 is default
where date_dt = to_date(to_char(sysdate-1, 'YYYY-MM-DD') || ' 19:16:08', 'YYYY-MM-DD HH24:MI:SS')
should work.
I also don't like using a function to handle a property which has been resolved again and again in every controller and service. Seem I'm not alone :D
Don't tried to get result with a promise as a variable, of course no way. But I found and use a solution below to access to the result as a property.
Firstly, write result to a property of your service:
app.factory('your_factory',function(){
var theParentIdResult = null;
var factoryReturn = {
theParentId: theParentIdResult,
addSiteParentId : addSiteParentId
};
return factoryReturn;
function addSiteParentId(nodeId) {
var theParentId = 'a';
var parentId = relationsManagerResource.GetParentId(nodeId)
.then(function(response){
factoryReturn.theParentIdResult = response.data;
console.log(theParentId); // #1
});
}
})
Now, we just need to ensure that method addSiteParentId
always be resolved before we accessed to property theParentId
. We can achieve this by using some ways.
Use resolve in router method:
resolve: {
parentId: function (your_factory) {
your_factory.addSiteParentId();
}
}
then in controller and other services used in your router, just call your_factory.theParentId to get your property. Referce here for more information: http://odetocode.com/blogs/scott/archive/2014/05/20/using-resolve-in-angularjs-routes.aspx
Use run
method of app to resolve your service.
app.run(function (your_factory) { your_factory.addSiteParentId(); })
Inject it in the first controller or services of the controller. In the controller we can call all required init services. Then all remain controllers as children of main controller can be accessed to this property normally as you want.
Chose your ways depend on your context depend on scope of your variable and reading frequency of your variable.
There is an incredibly simple way to do this, you have to clamp a point in x and y, but inside the square, while the center of the circle is between the two square border points in one of the perpendicular axis you need to clamp those coordinates to the parallel axis, just make sure the clamped coordinates do not exeed the limits of the square. Then just get the distance between the center of the circle and the clamped coordinates and check if the distance is less than the radius of the circle.
Here is how I did it (First 4 points are the square coordinates, the rest are circle points):
bool DoesCircleImpactBox(float x, float y, float x1, float y1, float xc, float yc, float radius){
float ClampedX=0;
float ClampedY=0;
if(xc>=x and xc<=x1){
ClampedX=xc;
}
if(yc>=y and yc<=y1){
ClampedY=yc;
}
radius = radius+1;
if(xc<x) ClampedX=x;
if(xc>x1) ClampedX=x1-1;
if(yc<y) ClampedY=y;
if(yc>y1) ClampedY=y1-1;
float XDif=ClampedX-xc;
XDif=XDif*XDif;
float YDif=ClampedY-yc;
YDif=YDif*YDif;
if(XDif+YDif<=radius*radius) return true;
return false;
}
There is a simple rule of thumb to tell you when to use ==
or is
.
==
is for value equality. Use it when you would like to know if two objects have the same value.is
is for reference equality. Use it when you would like to know if two references refer to the same object.In general, when you are comparing something to a simple type, you are usually checking for value equality, so you should use ==
. For example, the intention of your example is probably to check whether x has a value equal to 2 (==
), not whether x
is literally referring to the same object as 2.
Something else to note: because of the way the CPython reference implementation works, you'll get unexpected and inconsistent results if you mistakenly use is
to compare for reference equality on integers:
>>> a = 500
>>> b = 500
>>> a == b
True
>>> a is b
False
That's pretty much what we expected: a
and b
have the same value, but are distinct entities. But what about this?
>>> c = 200
>>> d = 200
>>> c == d
True
>>> c is d
True
This is inconsistent with the earlier result. What's going on here? It turns out the reference implementation of Python caches integer objects in the range -5..256 as singleton instances for performance reasons. Here's an example demonstrating this:
>>> for i in range(250, 260): a = i; print "%i: %s" % (i, a is int(str(i)));
...
250: True
251: True
252: True
253: True
254: True
255: True
256: True
257: False
258: False
259: False
This is another obvious reason not to use is
: the behavior is left up to implementations when you're erroneously using it for value equality.
Simply add a title
to your button
.
<button title="Hello World!">Sample Button</button>
_x000D_
This can be confusing especially when you are not passing any argument to the method. So what gives?
When you call a method on a class (such as work()
in this case), Python automatically passes self as the first argument.
Lets read that one more time:
When you call a method on a class (such as work()
in this case), Python automatically passes self as the first argument
So here Python is saying, hey I can see that work()
takes 0 positional arguments (because you have nothing inside the parenthesis) but you know that the self
argument is still being passed automatically when the method is called. So you better fix this and put that self
keyword back in.
Adding self
should resolve the problem. work(self)
class KeyStatisticCollection(DataDownloadUtilities.DataDownloadCollection):
def GenerateAddressStrings(self):
pass
def worker(self):
pass
def DownloadProc(self):
pass
That's not really a question of aesthetics, but indeed a technical difference. The directory thinking of it is totally correct and pretty much explaining everything. Let's work it out:
You have a fixed directory structure on your web server and only static files like images, html and so on — no server side scripts or whatsoever.
A browser requests /index.htm
, it exists and is delivered to the client. Later you have lots of - let's say - DVD movies reviewed and a html page for each of them in the /dvd/
directory. Now someone requests /dvd/adams_apples.htm
and it is delivered because it is there.
At some day, someone just requests /dvd/
- which is a directory and the server is trying to figure out what to deliver. Besides access restrictions and so on there are two possibilities: Show the user the directory content (I bet you already have seen this somewhere) or show a default file (in Apache it is: DirectoryIndex: sets the file that Apache will serve if a directory is requested.
)
So far so good, this is the expected case. It already shows the difference in handling, so let's get into it:
(Which is by the way completely understandable.) So, you did something entirely wrong and instead of uploading /dvd/the_big_lebowski.htm
you uploaded that file as dvd
(with no extension) to /
.
Someone bookmarked your /dvd/
directory listing (of course you didn't want to create and always update that nifty index.htm
) and is visiting your web-site. Directory content is delivered - all fine.
Someone heard of your list and is typing /dvd
. And now it is screwed. Instead of your DVD directory listing the server finds a file with that name and is delivering your Big Lebowski file.
So, you delete that file and tell the guy to reload the page. Your server looks for the /dvd
file, but it is gone. Most servers will then notice that there is a directory with that name and tell the client that what it was looking for is indeed somewhere else. The response will most likely be be:
Status Code:301 Moved Permanently
with Location: http://[...]/dvd/
So, totally ignoring what you think about directories or files, the server only can handle such stuff and - unless told differently - decides for you about the meaning of "slash or not".
Finally after receiving this response, the client loads /dvd/
and everything is fine.
Is it fine? No.
You have some dynamic page where everything is passed to /index.php
and gets processed. Everything worked quite good until now, but that entire thing starts to feel slower and you investigate.
Soon, you'll notice that /dvd/list
is doing exactly the same: Redirecting to /dvd/list/
which is then internally translated into index.php?controller=dvd&action=list
. One additional request - but even worse! customer/login
redirects to customer/login/
which in turn redirects to the HTTPS URL of customer/login/
. You end up having tons of unnecessary HTTP redirects (= additional requests) that make the user experience slower.
Most likely you have a default directory index here, too: index.php?controller=dvd
with no action
simply internally loads index.php?controller=dvd&action=list
.
If it ends with /
it can never be a file. No server guessing.
Slash or no slash are entirely different meanings. There is a technical/resource difference between "slash or no slash", and you should be aware of it and use it accordingly. Just because the server most likely loads /dvd/index.htm
- or loads the correct script stuff - when you say /dvd
: It does it, but not because you made the right request. Which would have been /dvd/
.
Omitting the slash even if you indeed mean the slashed version gives you an additional HTTP request penalty. Which is always bad (think of mobile latency) and has more weight than a "pretty URL" - especially since crawlers are not as dumb as SEOs believe or want you to believe ;)
Your compiler just tried to compile the file named foo.cc
. Upon hitting line number line
, the compiler finds:
#include "bar"
or
#include <bar>
The compiler then tries to find that file. For this, it uses a set of directories to look into, but within this set, there is no file bar
. For an explanation of the difference between the versions of the include statement look here.
g++
has an option -I
. It lets you add include search paths to the command line. Imagine that your file bar
is in a folder named frobnicate
, relative to foo.cc
(assume you are compiling from the directory where foo.cc
is located):
g++ -Ifrobnicate foo.cc
You can add more include-paths; each you give is relative to the current directory. Microsoft's compiler has a correlating option /I
that works in the same way, or in Visual Studio, the folders can be set in the Property Pages of the Project, under Configuration Properties->C/C++->General->Additional Include Directories.
Now imagine you have multiple version of bar
in different folders, given:
// A/bar
#include<string>
std::string which() { return "A/bar"; }
// B/bar
#include<string>
std::string which() { return "B/bar"; }
// C/bar
#include<string>
std::string which() { return "C/bar"; }
// foo.cc
#include "bar"
#include <iostream>
int main () {
std::cout << which() << std::endl;
}
The priority with #include "bar"
is leftmost:
$ g++ -IA -IB -IC foo.cc
$ ./a.out
A/bar
As you see, when the compiler started looking through A/
, B/
and C/
, it stopped at the first or leftmost hit.
This is true of both forms, include <>
and incude ""
.
#include <bar>
and #include "bar"
Usually, the #include <xxx>
makes it look into system folders first, the #include "xxx"
makes it look into the current or custom folders first.
E.g.:
Imagine you have the following files in your project folder:
list
main.cc
with main.cc
:
#include "list"
....
For this, your compiler will #include
the file list
in your project folder, because it currently compiles main.cc
and there is that file list
in the current folder.
But with main.cc
:
#include <list>
....
and then g++ main.cc
, your compiler will look into the system folders first, and because <list>
is a standard header, it will #include
the file named list
that comes with your C++ platform as part of the standard library.
This is all a bit simplified, but should give you the basic idea.
<>
/""
-priorities and -I
According to the gcc-documentation, the priority for include <>
is, on a "normal Unix system", as follows:
/usr/local/include
libdir/gcc/target/version/include
/usr/target/include
/usr/include
For C++ programs, it will also look in /usr/include/c++/version, first. In the above, target is the canonical name of the system GCC was configured to compile code for; [...].
The documentation also states:
You can add to this list with the -Idir command line option. All the directories named by -I are searched, in left-to-right order, before the default directories. The only exception is when dir is already searched by default. In this case, the option is ignored and the search order for system directories remains unchanged.
To continue our #include<list> / #include"list"
example (same code):
g++ -I. main.cc
and
#include<list>
int main () { std::list<int> l; }
and indeed, the -I.
prioritizes the folder .
over the system includes and we get a compiler error.
Bring up the Package Manager Console in Visual Studio - it's in Tools / NuGet Package Manager / Package Manager Console. Then run the Install-Package command:
Install-Package Common.Logging -Version 1.2.0
See the command reference for details.
Edit:
In order to list versions of a package you can use the Get-Package command with the remote argument and a filter:
Get-Package -ListAvailable -Filter Common.Logging -AllVersions
By pressing tab after the version option in the Install-Package
command, you get a list of the latest available versions.
You can actually download all font format variants directly from Google and include them in your css to serve from your server. That way you don't have to concern about Google tracking your site's users. However, the downside maybe slowing down your own serving speed. Fonts are quite demanding on resources. I have not done any tests in this issue yet, and wonder if anyone has similar thoughts.
First)
Second)
I had
numpy.array(n * [value])
in mind, but apparently that is slower than all other suggestions for large enough n
.
Here is full comparison with perfplot (a pet project of mine).
The two empty
alternatives are still the fastest (with NumPy 1.12.1). full
catches up for large arrays.
Code to generate the plot:
import numpy as np
import perfplot
def empty_fill(n):
a = np.empty(n)
a.fill(3.14)
return a
def empty_colon(n):
a = np.empty(n)
a[:] = 3.14
return a
def ones_times(n):
return 3.14 * np.ones(n)
def repeat(n):
return np.repeat(3.14, (n))
def tile(n):
return np.repeat(3.14, [n])
def full(n):
return np.full((n), 3.14)
def list_to_array(n):
return np.array(n * [3.14])
perfplot.show(
setup=lambda n: n,
kernels=[empty_fill, empty_colon, ones_times, repeat, tile, full, list_to_array],
n_range=[2 ** k for k in range(27)],
xlabel="len(a)",
logx=True,
logy=True,
)
I solved this problem with following piece of code in command line way:
File outputFile = new File("pathToFile");
Runtime.getRuntime().exec("logcat -c");
Runtime.getRuntime().exec("logcat -v time -f " + outputFile.getAbsolutePath())
Where "time" option adds metadata field details for date, invocation time, priority/tag, and PID of the process issuing the message.
Then in your code just do something similar to this (using android.util.Log):
Log.d("yourappname", "Your message");
Equivalent to "find and replace." Don't overthink it.
Try it with one:
library(tidyverse)
df <- data.frame(name = rep(letters[1:3], each = 3), var1 = rep('< 2', 9), var2 = rep('<3', 9))
df %>%
mutate(var1 = str_replace(var1, " ", ""))
#> name var1 var2
#> 1 a <2 <3
#> 2 a <2 <3
#> 3 a <2 <3
#> 4 b <2 <3
#> 5 b <2 <3
#> 6 b <2 <3
#> 7 c <2 <3
#> 8 c <2 <3
#> 9 c <2 <3
Apply to all
df %>%
mutate_all(funs(str_replace(., " ", "")))
#> name var1 var2
#> 1 a <2 <3
#> 2 a <2 <3
#> 3 a <2 <3
#> 4 b <2 <3
#> 5 b <2 <3
#> 6 b <2 <3
#> 7 c <2 <3
#> 8 c <2 <3
#> 9 c <2 <3
If the extra space was produced by uniting columns, think about making str_trim
part of your workflow.
Created on 2018-03-11 by the reprex package (v0.2.0).
Here is the example:
SQL> set define off;
SQL> select * from dual where dummy='&var';
no rows selected
SQL> set define on
SQL> /
Enter value for var: X
old 1: select * from dual where dummy='&var'
new 1: select * from dual where dummy='X'
D
-
X
With set define off
, it took a row with &var
value, prompted a user to enter a value for it and replaced &var
with the entered value (in this case, X
).
If you check Use option as meta key
in the keyboard tab of the preferences, then the default emacs style commands for forward- and backward-word and ?F
(Alt+F) and ?B
(Alt+B) respectively.
I'd recommend reading From Bash to Z-Shell. If you want to increase your bash/zsh prowess!
If you are only interested in the last line of input and you expect to find only one match (for example a part of the summary line of a shell command), you can also try this very compact code, adopted from How to print regexp matches using `awk`?:
$ echo "xxx yyy zzz" | awk '{match($0,"yyy",a)}END{print a[0]}'
yyy
Or the more complex version with a partial result:
$ echo "xxx=a yyy=b zzz=c" | awk '{match($0,"yyy=([^ ]+)",a)}END{print a[1]}'
b
Warning: the awk
match()
function with three arguments only exists in gawk
, not in mawk
Here is another nice solution using a lookbehind regex in grep
instead of awk
. This solution has lower requirements to your installation:
$ echo "xxx=a yyy=b zzz=c" | grep -Po '(?<=yyy=)[^ ]+'
b
This is due to a bug in Webkit.
You can work around the Webkit bug using createEvent('Event')
rather than createEvent('KeyboardEvent')
, and then assigning the keyCode
property. See this answer and this example.
Alternative solution based on the OP's own solution by utilizing an enum
. Additionally, a parser and round-trip tests are included.
public class RomanNumber {
public enum Digit {
M(1000, 3),
CM(900, 1),
D(500, 1),
CD(400, 1),
C(100, 3),
XC(90, 1),
L(50, 1),
XL(40, 1),
X(10, 3),
IX(9, 1),
V(5, 1),
IV(4, 1),
I(1, 3);
public final int value;
public final String symbol = name();
public final int maxArity;
private Digit(int value, int maxArity) {
this.value = value;
this.maxArity = maxArity;
}
}
private static final Digit[] DIGITS = Digit.values();
public static String of(int number) {
if (number < 1 || 3999 < number) {
throw new IllegalArgumentException(String.format(
"Roman numbers are only defined for numbers between 1 and 3999 (%d was given)",
number
));
}
StringBuilder sb = new StringBuilder();
for (Digit digit : DIGITS) {
int value = digit.value;
String symbol = digit.symbol;
while (number >= value) {
sb.append(symbol);
number -= value;
}
}
return sb.toString();
}
public static int parse(String roman) {
if (roman.isEmpty()) {
throw new NumberFormatException("The empty string does not comprise a valid Roman number");
}
int number = 0;
int offset = 0;
for (Digit digit : DIGITS) {
int value = digit.value;
int maxArity = digit.maxArity;
String symbol = digit.symbol;
for (int i = 0; i < maxArity && roman.startsWith(symbol, offset); i++) {
number += value;
offset += symbol.length();
}
}
if (offset != roman.length()) {
throw new NumberFormatException(String.format(
"The string '%s' does not comprise a valid Roman number",
roman
));
}
return number;
}
/** TESTS */
public static void main(String[] args) {
/* Demonstrating round-trip for all possible inputs. */
for (int number = 1; number <= 3999; number++) {
String roman = of(number);
int parsed = parse(roman);
if (parsed != number) {
System.err.format(
"ERROR: number: %d, roman: %s, parsed: %d\n",
number,
roman,
parsed
);
}
}
/* Some illegal inputs. */
int[] illegalNumbers = { -1, 0, 4000, 4001 };
for (int illegalNumber : illegalNumbers) {
try {
of(illegalNumber);
System.err.format(
"ERROR: Expected failure on number %d\n",
illegalNumber
);
} catch (IllegalArgumentException e) {
// Failed as expected.
}
}
String[] illegalRomans = { "MMMM", "CDCD", "IM", "T", "", "VV", "DM" };
for (String illegalRoman : illegalRomans) {
try {
parse(illegalRoman);
System.err.format(
"ERROR: Expected failure on roman %s\n",
illegalRoman
);
} catch (NumberFormatException e) {
// Failed as expected.
}
}
}
}
I will do something like this:
function findLongestWord(str) {
var array = str.split(" ");
var maxLength=array[0].length;
for(var i=0; i < array.length; i++ ) {
if(array[i].length > maxLength) maxLength = array[i].length}
return maxLength;}
findLongestWord("What if we try a super-long word such as otorhinolaryngology");
In Python 2.7.3:
import urllib2
import socket
class MyException(Exception):
pass
try:
urllib2.urlopen("http://example.com", timeout = 1)
except urllib2.URLError as e:
print type(e) #not catch
except socket.timeout as e:
print type(e) #catched
raise MyException("There was an error: %r" % e)
Even though this answer was too late, I'm adding it because I also went through a horrible time finding answer for the same matter. Only different was, I was struggling with AWS Comprehend Medical API.
At the moment I'm writing this answer, if anyone come across the same issue with any AWS SDKs please downgrade jackson-annotaions or any jackson dependencies to 2.8.* versions. The latest 2.9.* versions does not working properly with AWS SDK for some reason. Anyone have any idea about the reason behind that feel free to comment below.
Just in case if anyone is lazy to google maven repos, I have linked down necessary repos.Check them out!
If you are inside a .then() block and you want to execute a settimeout()
.then(() => {
console.log('wait for 10 seconds . . . . ');
return new Promise(function(resolve, reject) {
setTimeout(() => {
console.log('10 seconds Timer expired!!!');
resolve();
}, 10000)
});
})
.then(() => {
console.log('promise resolved!!!');
})
output will as shown below
wait for 10 seconds . . . .
10 seconds Timer expired!!!
promise resolved!!!
Happy Coding!
open terminal
\curl -sSL https://get.rvm.io | bash -s stable
restart terminal then
rvm install ruby-2.4.2
check ruby version it should be 2.4.2
This has been in the product for years - although it wasn't in the product in 2011.
But, simply click on the Model page.
Make sure you are on at least version 4.0 (released in 2013) to access this feature.
i == 'InvKey' && i == 'PostDate'
will never be true, since i
can never equal two different things at once.
You're probably trying to write
if (i !== 'InvKey' && i !== 'PostDate'))
Careful as target
might not work with all browsers, it works well with Chrome, but I reckon Firefox (or IE/Edge, can't remember) is a bit different and uses srcElement. I usually do something like
var t = ev.srcElement || ev.target;
thus leading to
$(document).ready(function() {
$("a").click(function(ev) {
// get target depending on what API's in use
var t = ev.srcElement || ev.target;
alert(t.id+" and "+$(t).attr('class'));
});
});
Thx for the nice answers!
From my experience, if you need high performance (this does depend slightly on your client specs) on large reports, go with rdlc. Additionally, rdlc reports give you a very full range of control over your data, you may be able to save yourself wasted database trips, etc. by using client side reports. On the project I'm currently working on, a critical report requires about 2 minutes to render on the server side, and pretty much takes out whichever reporting server it hits for that time. Switching it to client side rendering, we see performance much closer to 20-40 seconds with no load on the report server and less bandwidth used because only the datasets are being downloaded.
Your mileage may vary, and I find rdlc's add development and maintenance complexity, especially when your report has been designed as a server side report.
End of the user session means when the browser is shut down.
Read this: http://en.wikipedia.org/wiki/HTTP_cookie#Expires_and_Max-Age
First, be sure to read and understand the "How to write Go code" document.
The actual answer depends on the nature of your "custom package".
If it's intended to be of general use, consider employing the so-called "Github code layout". Basically, you make your library a separate go get
-table project.
If your library is for internal use, you could go like this:
To demonstrate:
src/
myproject/
mylib/
mylib.go
...
main.go
Now, in the top-level main.go
, you could import "myproject/mylib"
and it would work OK.
In TStringGrid cells property Col come first.
Property Cells[ACol, ARow: Integer]: string read GetCells write SetCells;
So the assignment StringGrid1.cells[2, 1] := 'abcde';
the value is displayed in the third column second row.
In v2.0 of the Graph API, calling /me/friends
returns the person's friends who also use the app.
In addition, in v2.0, you must request the user_friends
permission from each user. user_friends
is no longer included by default in every login. Each user must grant the user_friends
permission in order to appear in the response to /me/friends
. See the Facebook upgrade guide for more detailed information, or review the summary below.
The /me/friendlists
endpoint and user_friendlists
permission are not what you're after. This endpoint does not return the users friends - its lets you access the lists a person has made to organize their friends. It does not return the friends in each of these lists. This API and permission is useful to allow you to render a custom privacy selector when giving people the opportunity to publish back to Facebook.
If you want to access a list of non-app-using friends, there are two options:
If you want to let your people tag their friends in stories that they publish to Facebook using your App, you can use the /me/taggable_friends
API. Use of this endpoint requires review by Facebook and should only be used for the case where you're rendering a list of friends in order to let the user tag them in a post.
If your App is a Game AND your Game supports Facebook Canvas, you can use the /me/invitable_friends
endpoint in order to render a custom invite dialog, then pass the tokens returned by this API to the standard Requests Dialog.
In other cases, apps are no longer able to retrieve the full list of a user's friends (only those friends who have specifically authorized your app using the user_friends
permission).
For apps wanting allow people to invite friends to use an app, you can still use the Send Dialog on Web or the new Message Dialog on iOS and Android.
what's the easiest way to delete a directory with all it's files in it?
system("rm -rf ".escapeshellarg($dir));
Please check this fiddle and let me know if you get an alert of null value. I have copied your code there and added a couple of alerts. Just like others, I also dont see a null being returned, I get an empty string. Which browser are you using?
Update the master branch, which you need to do regardless.
Then, one of:
Rebase the old branch against the master branch. Solve the merge conflicts during rebase, and the result will be an up-to-date branch that merges cleanly against master.
Merge your branch into master, and resolve the merge conflicts.
Merge master into your branch, and resolve the merge conflicts. Then, merging from your branch into master should be clean.
None of these is better than the other, they just have different trade-off patterns.
I would use the rebase approach, which gives cleaner overall results to later readers, in my opinion, but that is nothing aside from personal taste.
To rebase and keep the branch you would:
git checkout <branch> && git rebase <target>
In your case, check out the old branch, then
git rebase master
to get it rebuilt against master.
As the name suggests 'untracked files' are the files which are not being tracked by git. They are not in your staging area, and were not part of any previous commits. If you want them to be versioned (or to be managed by git) you can do so by telling 'git' by using 'git add'. Check this chapter Recording Changes to the Repository in the Progit book which uses a nice visual to provide a good explanation about recording changes to git repo and also explaining the terms 'tracked' and 'untracked'.
If your Local branch and remote branch is the same name then you can just do it:
git push origin branchName
When your local and remote branch name is different then you can just do it:
git push origin localBranchName:remoteBranchName
you need import requests
and use from json() method :
source = requests.get("url").json()
print(source)
Of course, this method also works:
import json,urllib.request
data = urllib.request.urlopen("url").read()
output = json.loads(data)
print (output)
json.loads
will decode it into a Python object using this table, for example a JSON object will become a Python dict
.
try $conn = mysql_connect("localhost", "root")
or $conn = mysql_connect("localhost", "root", "")
Cache-Control: private
Indicates that all or part of the response message is intended for a single user and MUST NOT be cached by a shared cache, such as a proxy server.
It's a value type large enough to store a memory address as used in native or unsafe code, but not directly usable as a memory address in safe managed code.
You can use IntPtr.Size
to find out whether you're running in a 32-bit or 64-bit process, as it will be 4 or 8 bytes respectively.
Use:
:ls
- to list buffers:bd#n
- to close buffer where #n is the buffer number (use ls
to get it)Examples:
to delete buffer 2:
:bd2
Some of more advanced Oracle database features such as session trace do not work properly in Oracle 11g XE 32-bit if installed on Windows 64-bit system. I needed session trace on Windows 7 64-bit.
Apart from that it works well for me in multiple production MS Windows 64-bit systems: Windows Server 2008 R2 and Windows Server 2003 R2.
I think that the Easiest way in your case is :
DEFINE EmpIDVar = 1234;
SELECT *
FROM Employees
WHERE EmployeeID = &EmpIDVar
For the string values it will be like :
DEFINE EmpIDVar = '1234';
SELECT *
FROM Employees
WHERE EmployeeID = '&EmpIDVar'
Ok, so very important to realize the implications here.
Docs say that SSL over 465 is NOT supported in SmtpClient.
Seems like you have no choice but to use STARTTLS which may not be supported by your mail host. You may have to use a different library if your host requires use of SSL over 465.
Quoted from http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.enablessl(v=vs.110).aspx
The SmtpClient class only supports the SMTP Service Extension for Secure SMTP over Transport Layer Security as defined in RFC 3207. In this mode, the SMTP session begins on an unencrypted channel, then a STARTTLS command is issued by the client to the server to switch to secure communication using SSL. See RFC 3207 published by the Internet Engineering Task Force (IETF) for more information.
An alternate connection method is where an SSL session is established up front before any protocol commands are sent. This connection method is sometimes called SMTP/SSL, SMTP over SSL, or SMTPS and by default uses port 465. This alternate connection method using SSL is not currently supported.
1) Install packages
$ sudo apt update;sudo apt install --no-install-recommends ubuntu-desktop
$ sudo apt install gnome-panel gnome-settings-daemon metacity nautilus gnome-terminal vnc4server
2) Edit /usr/bin/vncserver file and modify as below
Find this line
"# exec /etc/X11/xinit/xinitrc\n\n".
And add these lines below.
"gnome-session &\n".
"gnome-panel &\n".
"gnome-settings-daemon &\n".
"metacity &\n".
"nautilus &\n".
"gnome-terminal &\n".
3) Create VNC password and vnc session for the user using "vncserver" command.
lonely@ubuntu:~$ vncserver
You will require a password to access your desktops.
Password:
Verify:
xauth: file /home/lonely/.Xauthority does not exist
New 'ubuntu:1 (lonely)' desktop is ubuntu:1
Creating default startup script /home/lonely/.vnc/xstartup
Starting applications specified in /home/lonely/.vnc/xstartup
Log file is /home/lonely/.vnc/ubuntu:1.log
Now you can access GUI using IP/Domain and port 1
stackoverflow.com:1
Tested on AWS and digital ocean .
For AWS, you have to allow port 5901 on firewall
To kill session
$ vncserver -kill :1
Refer:
https://linode.com/docs/applications/remote-desktop/install-vnc-on-ubuntu-16-04/
Refer this guide to create permanent sessions as service
http://www.krizna.com/ubuntu/enable-remote-desktop-ubuntu-16-04-vnc/
You can use this library:
https://github.com/kmfish/MultiTypeListViewAdapter (written by me)
Setup adapter:
adapter = new BaseRecyclerAdapter();
adapter.registerDataAndItem(TextModel.class, LineListItem1.class);
adapter.registerDataAndItem(ImageModel.class, LineListItem2.class);
adapter.registerDataAndItem(AbsModel.class, AbsLineItem.class);
For each line item:
public class LineListItem1 extends BaseListItem<TextModel, LineListItem1.OnItem1ClickListener> {
TextView tvName;
TextView tvDesc;
@Override
public int onGetLayoutRes() {
return R.layout.list_item1;
}
@Override
public void bindViews(View convertView) {
Log.d("item1", "bindViews:" + convertView);
tvName = (TextView) convertView.findViewById(R.id.text_name);
tvDesc = (TextView) convertView.findViewById(R.id.text_desc);
tvName.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (null != attachInfo) {
attachInfo.onNameClick(getData());
}
}
});
tvDesc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (null != attachInfo) {
attachInfo.onDescClick(getData());
}
}
});
}
@Override
public void updateView(TextModel model, int pos) {
if (null != model) {
Log.d("item1", "updateView model:" + model + "pos:" + pos);
tvName.setText(model.getName());
tvDesc.setText(model.getDesc());
}
}
public interface OnItem1ClickListener {
void onNameClick(TextModel model);
void onDescClick(TextModel model);
}
}
There are two ways to connect remote redis server using redis-cli
:
redis-cli -h host -p port
If your instance is password protected
redis-cli -h host -p port -a password
e.g. if my-web.cache.amazonaws.com
is the host url and 6379
is the port
Then this will be the command:
redis-cli -h my-web.cache.amazonaws.com -p 6379
if 92.101.91.8
is the host IP address and 6379
is the port:
redis-cli -h 92.101.91.8 -p 6379
command if the instance is protected with password pass123
:
redis-cli -h my-web.cache.amazonaws.com -p 6379 -a pass123
uri
option in commandredis-cli -u redis://password@host:port
command in a single uri
form with username & password
redis-cli -u redis://username:password@host:port
e.g. for the same above host - port configuration command would be
redis-cli -u redis://[email protected]:6379
command if username is also provided user123
redis-cli -u redis://user123:[email protected]:6379
This detailed answer was for those who wants to check all options. For more information check documentation: Redis command line usage
Just drag it into the Frameworks, Libraries, and Embedded Content
of the General
section of the Target
:
Note that Xcode 11 and 10 have a very similar flow too.
Looking at the dates for which it doesn't work -- those where the day is less than or equal to 12 -- I'm wondering whether it's parsing the dates as being in YYYY-DD-MM format?
A formula for an angle from 0 to 2pi.
There is x=x2-x1 and y=y2-y1.The formula is working for
any value of x and y. For x=y=0 the result is undefined.
f(x,y)=pi()-pi()/2*(1+sign(x))*(1-sign(y^2))
-pi()/4*(2+sign(x))*sign(y)
-sign(x*y)*atan((abs(x)-abs(y))/(abs(x)+abs(y)))
Here is a function to get the IP address using a filter for local and LAN IP addresses:
function get_IP_address()
{
foreach (array('HTTP_CLIENT_IP',
'HTTP_X_FORWARDED_FOR',
'HTTP_X_FORWARDED',
'HTTP_X_CLUSTER_CLIENT_IP',
'HTTP_FORWARDED_FOR',
'HTTP_FORWARDED',
'REMOTE_ADDR') as $key){
if (array_key_exists($key, $_SERVER) === true){
foreach (explode(',', $_SERVER[$key]) as $IPaddress){
$IPaddress = trim($IPaddress); // Just to be safe
if (filter_var($IPaddress,
FILTER_VALIDATE_IP,
FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)
!== false) {
return $IPaddress;
}
}
}
}
}
cd %windir%\system32\inetsrv
@echo off
for /F "tokens=* USEBACKQ" %%x in (
`appcmd list apppool /text:name`
) do (
echo|set /p= "%%x - " /text:name & appcmd.exe list apppool "%%x" /text:processModel.identityType
)
echo %date% & echo %time%
pause
if hostname does not work, try IP address.
This is going on right now so I have to say. I try to ssh with my host name and it does not work
ssh [email protected]
this gives the error "ssh_exchange_identification: Connection closed by remote host"
this USED to work one hour back.
BUT, and here is the interesting part, the IP address works!
ssh [email protected]
(of course the actual IP address is different)
Go figure!
The echo -e
must have been failing for you because of wrong escaping.
The following code works fine for me on a similar output from your_program with arguments
:
echo -e $(your_program with arguments | sed -e 's/0x\(..\)\.\?/\\x\1/g')
Please note however that your original hexstring consists of non-printable characters.
To view open ports, use the following command:
firewall-cmd --list-ports
We use the following to see services whose ports are open:
firewall-cmd --list-services
We use the following to see services whose ports are open and see open ports:
firewall-cmd --list-all
To add a service to the firewall, we use the following command, in which case the service will use any port to open in the firewall:
firewall-cmd --add-services=ntp
For this service to be permanently open we use the following command:
firewall-cmd -add-service=ntp --permanent
To add a port, use the following command:
firewall-cmd --add-port=132/tcp --permanent
It doesn't seem like you can access this in browser. The search input is a Webkit HTML wrapper for the Cocoa NSSearchField. The cancel button seems to be contained within the browser client code with no external reference available from the wrapper.
Sources:
Looks like you'll have to figure it out through mouse position on click with something like:
$('input[type=search]').bind('click', function(e) {
var $earch = $(this);
var offset = $earch.offset();
if (e.pageX > offset.left + $earch.width() - 16) { // X button 16px wide?
// your code here
}
});
I recommend you just use rubyinstaller
It is recommended by the official Ruby page - see https://www.ruby-lang.org/en/downloads/
Ways of Installing Ruby
We have several tools on each major platform to install Ruby:
- On Linux/UNIX, you can use the package management system of your distribution or third-party tools (rbenv and RVM).
- On OS X machines, you can use third-party tools (rbenv and RVM).
- On Windows machines, you can use RubyInstaller.
Or, you may exclude the options in quotes:
FOR /F %%i IN (myfile.txt) DO ECHO %%i
If you want more than one style this is the correct full answer. This is div with class and style:
<div className="class-example" style={{width: '300px', height: '150px'}}></div>
I've been trying to activate 'active' class manually with javascript. It's not as usable as a complete library, but for easy cases seems to be enough:
var button = $('#myToggleButton');
button.on('click', function () {
$(this).toggleClass('active');
});
If you think carefully, 'active' class is used by bootstrap when the button is being pressed, not before or after that (our case), so there's no conflict in reuse the same class.
Try this example and tell me if it fails: http://jsbin.com/oYoSALI/1/edit?html,js,output
You simply need to make cab
a string:
cab = '6176'
As the error message states, you cannot do <int> in <string>
:
>>> 1 in '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'in <string>' requires string as left operand, not int
>>>
because integers and strings are two totally different things and Python does not embrace implicit type conversion ("Explicit is better than implicit.").
In fact, Python only allows you to use the in
operator with a right operand of type string if the left operand is also of type string:
>>> '1' in '123' # Works!
True
>>>
>>> [] in '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'in <string>' requires string as left operand, not list
>>>
>>> 1.0 in '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'in <string>' requires string as left operand, not float
>>>
>>> {} in '123'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'in <string>' requires string as left operand, not dict
>>>
No, there is not.
First of all, SQL injection is an input filtering problem, and XSS is an output escaping one - so you wouldn't even execute these two operations at the same time in the code lifecycle.
Basic rules of thumb
mysql_real_escape_string()
)strip_tags()
to filter out unwanted HTMLhtmlspecialchars()
and be mindful of the 2nd and 3rd parameters here.If you look at the Object class (Parent class of all classes in Java) the toString() method implementation is
public String toString() {
return getClass().getName() + "@" + Integer.toHexString(hashCode());
}
whenever you print any object in Java then toString() will be call. Now it's up to you if you override toString() then your method will call other Object class method call.
Check your index.html. If you have accidentally removed the following part, include it and it will be fine
<base href="/">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" type="image/x-icon" href="favicon.ico">
You could also use Except(produces the set difference of two sequences) to check whether there's a difference or not:
IEnumerable<string> inFirstOnly = a1.Except(a2);
IEnumerable<string> inSecondOnly = a2.Except(a1);
bool allInBoth = !inFirstOnly.Any() && !inSecondOnly.Any();
So this is an efficient way if the order and if the number of duplicates does not matter(as opposed to the accepted answer's SequenceEqual
). Demo: Ideone
If you want to compare in a case insentive way, just add StringComparer.OrdinalIgnoreCase
:
a1.Except(a2, StringComparer.OrdinalIgnoreCase)
The problem is that your anonymous object property data-icon
has an invalid name. C# properties cannot have dashes in their names. There are two ways you can get around that:
Use an underscore instead of dash (MVC will automatically replace the underscore with a dash in the emitted HTML):
@Html.ActionLink("Edit", "edit", "markets",
new { id = 1 },
new {@class="ui-btn-right", data_icon="gear"})
Use the overload that takes in a dictionary:
@Html.ActionLink("Edit", "edit", "markets",
new { id = 1 },
new Dictionary<string, object> { { "class", "ui-btn-right" }, { "data-icon", "gear" } });
I'm using Mac OS and to write multiple lines in a SH Script following code worked for me
#! /bin/bash
FILE_NAME="SomeRandomFile"
touch $FILE_NAME
echo """I wrote all
the
stuff
here.
And to access a variable we can use
$FILE_NAME
""" >> $FILE_NAME
cat $FILE_NAME
Please don't forget to assign chmod as required to the script file. I have used
chmod u+x myScriptFile.sh
Use the "\uxxxx" escape format.
According to Wikipedia, the copyright symbol is unicode U+00A9 so your line should read:
String copyright = "\u00a9 2003-2008 My Company. All rights reserved.";
Per the Express (Version 4+) docs, you can use:
res.status(400);
res.send('None shall pass');
http://expressjs.com/4x/api.html#res.status
<=3.8
res.statusCode = 401;
res.send('None shall pass');
You can merge multiple modules in one rootModule , and assign that module as ng-app to a superior element ex: body tag.
code ex:
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<script src="namesController.js"></script>
<script src="myController.js"></script>
<script>var rootApp = angular.module('rootApp', ['myApp1','myApp2'])</script>
<body ng-app="rootApp">
<div ng-app="myApp1" ng-controller="myCtrl" >
First Name: <input type="text" ng-model="firstName"><br>
Last Name: <input type="text" ng-model="lastName"><br>
<br>
Full Name: {{firstName + " " + lastName}}
</div>
<div ng-app="myApp2" ng-controller="namesCtrl">
<ul>
<li ng-bind="first">{{first}}
</li>
</ul>
</div>
</body>
</html>
Using the AWS Management Console
Short Version: You might as well do the boolean isDebugEnabled() check.
Reasons:
1- If complicated logic / string concat. is added to your debug statement you will already have the check in place.
2- You don't have to selectively include the statement on "complex" debug statements. All statements are included that way.
3- Calling log.debug executes the following before logging:
if(repository.isDisabled(Level.DEBUG_INT))
return;
This is basically the same as calling log. or cat. isDebugEnabled().
HOWEVER! This is what the log4j developers think (as it is in their javadoc and you should probably go by it.)
This is the method
public
boolean isDebugEnabled() {
if(repository.isDisabled( Level.DEBUG_INT))
return false;
return Level.DEBUG.isGreaterOrEqual(this.getEffectiveLevel());
}
This is the javadoc for it
/**
* Check whether this category is enabled for the <code>DEBUG</code>
* Level.
*
* <p> This function is intended to lessen the computational cost of
* disabled log debug statements.
*
* <p> For some <code>cat</code> Category object, when you write,
* <pre>
* cat.debug("This is entry number: " + i );
* </pre>
*
* <p>You incur the cost constructing the message, concatenatiion in
* this case, regardless of whether the message is logged or not.
*
* <p>If you are worried about speed, then you should write
* <pre>
* if(cat.isDebugEnabled()) {
* cat.debug("This is entry number: " + i );
* }
* </pre>
*
* <p>This way you will not incur the cost of parameter
* construction if debugging is disabled for <code>cat</code>. On
* the other hand, if the <code>cat</code> is debug enabled, you
* will incur the cost of evaluating whether the category is debug
* enabled twice. Once in <code>isDebugEnabled</code> and once in
* the <code>debug</code>. This is an insignificant overhead
* since evaluating a category takes about 1%% of the time it
* takes to actually log.
*
* @return boolean - <code>true</code> if this category is debug
* enabled, <code>false</code> otherwise.
* */
Here is a version with configurable parameters that you can set programmatically:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text" encoding="utf-8" />
<xsl:param name="delim" select="','" />
<xsl:param name="quote" select="'"'" />
<xsl:param name="break" select="'
'" />
<xsl:template match="/">
<xsl:apply-templates select="projects/project" />
</xsl:template>
<xsl:template match="project">
<xsl:apply-templates />
<xsl:if test="following-sibling::*">
<xsl:value-of select="$break" />
</xsl:if>
</xsl:template>
<xsl:template match="*">
<!-- remove normalize-space() if you want keep white-space at it is -->
<xsl:value-of select="concat($quote, normalize-space(), $quote)" />
<xsl:if test="following-sibling::*">
<xsl:value-of select="$delim" />
</xsl:if>
</xsl:template>
<xsl:template match="text()" />
</xsl:stylesheet>
First, there is a difference between spec and reality. The spec says that System.gc() is a hint that GC should run and the VM is free to ignore it. The reality is, the VM will never ignore a call to System.gc().
Calling GC comes with a non-trivial overhead to the call and if you do this at some random point in time it's likely you'll see no reward for your efforts. On the other hand, a naturally triggered collection is very likely to recoup the costs of the call. If you have information that indicates that a GC should be run than you can make the call to System.gc() and you should see benefits. However, it's my experience that this happens only in a few edge cases as it's very unlikely that you'll have enough information to understand if and when System.gc() should be called.
One example listed here, hitting the garbage can in your IDE. If you're off to a meeting why not hit it. The overhead isn't going to affect you and heap might be cleaned up for when you get back. Do this in a production system and frequent calls to collect will bring it to a grinding halt! Even occasional calls such as those made by RMI can be disruptive to performance.
The lxml library includes a very convenient syntax for XML generation, called the E-factory. Here's how I'd make the example you give:
#!/usr/bin/python
import lxml.etree
import lxml.builder
E = lxml.builder.ElementMaker()
ROOT = E.root
DOC = E.doc
FIELD1 = E.field1
FIELD2 = E.field2
the_doc = ROOT(
DOC(
FIELD1('some value1', name='blah'),
FIELD2('some value2', name='asdfasd'),
)
)
print lxml.etree.tostring(the_doc, pretty_print=True)
Output:
<root>
<doc>
<field1 name="blah">some value1</field1>
<field2 name="asdfasd">some value2</field2>
</doc>
</root>
It also supports adding to an already-made node, e.g. after the above you could say
the_doc.append(FIELD2('another value again', name='hithere'))
Two different characters.
\n
is used as an end-of-line terminator in Unix text files
\r
Was historically (pre-OS X) used as an end-of-line terminator in Mac text files
\r\n
(ie both) are used to terminate lines in Windows and DOS text files.
It looks like you are executing that command from a DOS session (see this thread), and that means you need to create the .ssh
directory before said command.
Or you can execute it from the bash session (part of the msysgit distribution), and it should work.
Here is the code to get the Dimensions of the complete view of the device.
var windowSize = Dimensions.get("window");
Use it like this:
width=windowSize.width,heigth=windowSize.width/0.565
CSS Modules let you use the same CSS class name in different files without worrying about naming clashes.
Button.module.css
.error {
background-color: red;
}
another-stylesheet.css
.error {
color: red;
}
Button.js
import React, { Component } from 'react';
import styles from './Button.module.css'; // Import css modules stylesheet as styles
import './another-stylesheet.css'; // Import regular stylesheet
class Button extends Component {
render() {
// reference as a js object
return <button className={styles.error}>Error Button</button>;
}
}
A simple route 4 / 100.0
or
4.0 / 100
Is it literally just the second line you want to indent, or is it from the second line (ie. a hanging indent)?
If it is the latter, something along the lines of this JSFiddle would be appropriate.
div {_x000D_
padding-left: 1.5em;_x000D_
text-indent:-1.5em;_x000D_
}_x000D_
_x000D_
span {_x000D_
padding-left: 1.5em;_x000D_
text-indent:-1.5em;_x000D_
}
_x000D_
<div>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.</div>_x000D_
_x000D_
<span>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.</span>
_x000D_
This example shows how using the same CSS syntax in a DIV or SPAN produce different effects.
I'd the same problem and excluding the DataSourceAutoConfiguration solved the problem.
@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class RecommendationEngineWithCassandraApplication {
public static void main(String[] args) {
SpringApplication.run(RecommendationEngineWithCassandraApplication.class, args);
}
}
I didn't see an answer that's clean and suitable for production-ready software, so here it goes:
/*
* Get current error_reporting value,
* so that we don't lose preferences set in php.ini and .htaccess
* and accidently reenable message types disabled in those.
*
* If you want to disable e.g. E_STRICT on a global level,
* use php.ini (or .htaccess for folder-level)
*/
$old_error_reporting = error_reporting();
/*
* Disable E_STRICT on top of current error_reporting.
*
* Note: do NOT use ^ for disabling error message types,
* as ^ will re-ENABLE the message type if it happens to be disabled already!
*/
error_reporting($old_error_reporting & ~E_STRICT);
// code that should not emit E_STRICT messages goes here
/*
* Optional, depending on if/what code comes after.
* Restore old settings.
*/
error_reporting($old_error_reporting);
This is very classic case: If you end up having to check for any data provided by the http instance then consider moving that code under the BeginRequest
event.
void Application_BeginRequest(Object source, EventArgs e)
This is the right place to check for http headers, query string and etc...
Application_Start
is for the settings that apply for the application entire run time, such as routing, filters, logging and so on.
Please, don't apply any workarounds such as static .ctor or switching to the Classic mode unless there's no way to move the code from the Start
to BeginRequest
. that should be doable for the vast majority of your cases.
pseudo-code:
minutes = floor(326.4/60)
seconds = round(326.4 - minutes * 60)
Had same problem - it was somewhere in the ca certificate, so I used the ca bundle used for curl, and it worked. You can download the curl ca bundle here: https://curl.haxx.se/docs/caextract.html
For encryption and security issues see this helpful article:
https://www.venditan.com/labs/2014/06/26/ssl-and-php-streams-part-1-you-are-doing-it-wrongtm/432
Here is the example:
$url = 'https://www.example.com/api/list';
$cn_match = 'www.example.com';
$data = array (
'apikey' => '[example api key here]',
'limit' => intval($limit),
'offset' => intval($offset)
);
// use key 'http' even if you send the request to https://...
$options = array(
'http' => array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query($data)
)
, 'ssl' => array(
'verify_peer' => true,
'cafile' => [path to file] . "cacert.pem",
'ciphers' => 'HIGH:TLSv1.2:TLSv1.1:TLSv1.0:!SSLv3:!SSLv2',
'CN_match' => $cn_match,
'disable_compression' => true,
)
);
$context = stream_context_create($options);
$response = file_get_contents($url, false, $context);
Hope that helps
Example:
Process process = Process.Start(@"Data\myApp.exe");
int id = process.Id;
Process tempProc = Process.GetProcessById(id);
this.Visible = false;
tempProc.WaitForExit();
this.Visible = true;
I usually just float the first to the left, the second to the right. The third automatically aligns between them then.
<div style="float: left;">Column 1</div>
<div style="float: right;">Column 3</div>
<div>Column 2</div>
Note that this will not work:
header('Location: $url');
You need to do this (for variable expansion):
header("Location: $url");
cv:Mat mat;
int rows = mat.rows;
int cols = mat.cols;
cv::Size s = mat.size();
rows = s.height;
cols = s.width;
Also note that stride >= cols; this means that actual size of the row can be greater than element size x cols. This is different from the issue of continuous Mat and is related to data alignment.
I have the same problem as @KTCheek in that I need it to execute sequentially. However I figured I would try using IAsyncEnumerable (introduced in .NET Core 3) and await foreach (introduced in C# 8). Here's what I have come up with:
public static class IEnumerableExtensions {
public static async IAsyncEnumerable<TResult> SelectAsync<TSource, TResult>(this IEnumerable<TSource> source, Func<TSource, Task<TResult>> selector) {
foreach (var item in source) {
yield return await selector(item);
}
}
}
public static class IAsyncEnumerableExtensions {
public static async Task<List<TSource>> ToListAsync<TSource>(this IAsyncEnumerable<TSource> source) {
var list = new List<TSource>();
await foreach (var item in source) {
list.Add(item);
}
return list;
}
}
This can be consumed by saying:
var inputs = await events.SelectAsync(ev => ProcessEventAsync(ev)).ToListAsync();
Update: Alternatively you can add a reference to "System.Linq.Async" and then you can say:
var inputs = await events
.ToAsyncEnumerable()
.SelectAwait(async ev => await ProcessEventAsync(ev))
.ToListAsync();
Masking means to keep/change/remove a desired part of information. Lets see an image-masking operation; like- this masking operation is removing any thing that is not skin-
We are doing AND operation in this example. There are also other masking operators- OR, XOR.
Bit-Masking means imposing mask over bits. Here is a bit-masking with AND-
1 1 1 0 1 1 0 1 [input] (&) 0 0 1 1 1 1 0 0 [mask] ------------------------------ 0 0 1 0 1 1 0 0 [output]
So, only the middle 4 bits (as these bits are 1
in this mask) remain.
Lets see this with XOR-
1 1 1 0 1 1 0 1 [input] (^) 0 0 1 1 1 1 0 0 [mask] ------------------------------ 1 1 0 1 0 0 0 1 [output]
Now, the middle 4 bits are flipped (1
became 0
, 0
became 1
).
So, using bit-mask we can access individual bits [examples]. Sometimes, this technique may also be used for improving performance. Take this for example-
bool isOdd(int i) {
return i%2;
}
This function tells if an integer is odd/even. We can achieve the same result with more efficiency using bit-mask-
bool isOdd(int i) {
return i&1;
}
Short Explanation: If the least significant bit of a binary number is 1
then it is odd; for 0
it will be even. So, by doing AND with 1
we are removing all other bits except for the least significant bit i.e.:
55 -> 0 0 1 1 0 1 1 1 [input] (&) 1 -> 0 0 0 0 0 0 0 1 [mask] --------------------------------------- 1 <- 0 0 0 0 0 0 0 1 [output]
This is not as easy as it seems, some core library functions don't work when only str is overwritten (checked with Python 2.7), see this thread for examples How to make a class JSON serializable Also, try this
import json
class A(unicode):
def __str__(self):
return 'a'
def __unicode__(self):
return u'a'
def __repr__(self):
return 'a'
a = A()
json.dumps(a)
produces
'""'
and not
'"a"'
as would be expected.
EDIT: answering mchicago's comment:
unicode does not have any attributes -- it is an immutable string, the value of which is hidden and not available from high-level Python code. The json
module uses re
for generating the string representation which seems to have access to this internal attribute. Here's a simple example to justify this:
b = A('b')
print b
produces
'a'
while
json.dumps({'b': b})
produces
{"b": "b"}
so you see that the internal representation is used by some native libraries, probably for performance reasons.
See also this for more details: http://www.laurentluce.com/posts/python-string-objects-implementation/
You can fake a UITextField using UITextView. The problem you'll have is that you lose the place holder functionality.
If you choose to use a UITextView and need the placeholder, do this:
In your viewDidLoad set the color and text to placeholders:
myTxtView.textColor = .lightGray
myTxtView.text = "Type your thoughts here..."
Then make the placeholder disappear when your UITextView is selected:
func textViewDidBeginEditing (textView: UITextView) {
if myTxtView.textColor.textColor == ph_TextColor && myTxtView.isFirstResponder() {
myTxtView.text = nil
myTxtView.textColor = .white
}
}
When the user finishes editing, ensure there's a value. If there isn't, add the placeholder again:
func textViewDidEndEditing (textView: UITextView) {
if myTxtView.text.isEmpty || myTxtView.text == "" {
myTxtView.textColor = .lightGray
myTxtView.text = "Type your thoughts here..."
}
}
Other features you might need to fake:
UITextField's often capitalize every letter, you can add that feature to UITableView:
myTxtView.autocapitalizationType = .words
UITextField's don't usually scroll:
myTxtView.scrollEnabled = false
You can text-align: center the body to center the container. Then text-align: left the container to get all the text, etc. to align left.
Easier steps:
In IntelliJ Community Edition 2019.02, Changing the following settings worked for me
Update File->Project structure->Project Settings->Project->Project Language level to Java 11 (update to the java version that you wish to use in your project) using drop down.
Update File->Project structure->Project Settings->Modules->Language level
Update File->Settings->Build,Execution,Deployment -> Compiler -> Java Compiler-> Project ByteCode Version to java 11.
Update Target version for all the entries under File->Settings->Build,Execution,Deployment -> Compiler -> Java Compiler-> Per module Byte Code Version.
Another way is to use an array as a type, e.g.:
Video[] videoArray = gson.fromJson(json, Video[].class);
This way you avoid all the hassle with the Type object, and if you really need a list you can always convert the array to a list, e.g.:
List<Video> videoList = Arrays.asList(videoArray);
IMHO this is much more readable.
In Kotlin this looks like this:
Gson().fromJson(jsonString, Array<Video>::class.java)
To convert this array into List, just use .toList()
method
I am a programmer who has to deal with a lot of code on a daily basis. Open source and what has been developed in house.
As a programmer, I find it useful to have many source files open at once, and often organise my desktop on my (widescreen) monitor so that two source files are side by side. I might be programming in both, or just reading one and programming in the other.
I find it dissatisfying and frustrating when one of those source files is >120 characters in width, because it means I can't comfortably fit a line of code on a line of screen. It upsets formatting to line wrap.
I say '120' because that's the level to which I would get annoyed at code being wider than. After that many characters, you should be splitting across lines for readability, let alone coding standards.
I write code with 80 columns in mind. This is just so that when I do leak over that boundary, it's not such a bad thing.
The process for timing out an operations is described in the documentation for signal.
The basic idea is to use signal handlers to set an alarm for some time interval and raise an exception once that timer expires.
Note that this will only work on UNIX.
Here's an implementation that creates a decorator (save the following code as timeout.py
).
from functools import wraps
import errno
import os
import signal
class TimeoutError(Exception):
pass
def timeout(seconds=10, error_message=os.strerror(errno.ETIME)):
def decorator(func):
def _handle_timeout(signum, frame):
raise TimeoutError(error_message)
def wrapper(*args, **kwargs):
signal.signal(signal.SIGALRM, _handle_timeout)
signal.alarm(seconds)
try:
result = func(*args, **kwargs)
finally:
signal.alarm(0)
return result
return wraps(func)(wrapper)
return decorator
This creates a decorator called @timeout
that can be applied to any long running functions.
So, in your application code, you can use the decorator like so:
from timeout import timeout
# Timeout a long running function with the default expiry of 10 seconds.
@timeout
def long_running_function1():
...
# Timeout after 5 seconds
@timeout(5)
def long_running_function2():
...
# Timeout after 30 seconds, with the error "Connection timed out"
@timeout(30, os.strerror(errno.ETIMEDOUT))
def long_running_function3():
...
Object class has toString method. All other classes extending it overrides the toString method so in for arrays also toString is overrided in this way. So if you want your output in your way you need to create your own method by which you will get your desired result.
str="";
for (Integer i:arr){
str+=i.toString();
}
Hope this helps
refer Why does the toString method in java not seem to work for an array
location ~ /issue([0-9]+) {
return 301 http://example.com/shop/issues/custom_isse_name$1;
}
If you don't see the "Browse With..." option stop debugging first. =)
Make it static (shared in VB).
Public Class Form1
Public Shared SomeValue As Integer = 5
End Class
64-bit binaries are stored in PE32+ format. Try reading http://www.masm32.com/board/index.php?action=dlattach;topic=6687.0;id=3486
I think there's a separate way to raise the heap limit of the dexing operation. Add this to your android
closure in your build.gradle
file:
dexOptions {
javaMaxHeapSize "4g"
}
and see if that helps.
(idea courtesy of this answer from Scott Barta)
use this(assume that your table name is emails):
select * from emails as a
inner join
(select EmailAddress, min(Id) as id from emails
group by EmailAddress ) as b
on a.EmailAddress = b.EmailAddress
and a.Id = b.id
hope this help..
Differently than everyone else did using regex, I would try to exclude every character that is not what I want, instead of enumerating explicitly what I don't want.
For example, if I want only characters from 'a to z' (upper and lower case) and numbers, I would exclude everything else:
import re
s = re.sub(r"[^a-zA-Z0-9]","",s)
This means "substitute every character that is not a number, or a character in the range 'a to z' or 'A to Z' with an empty string".
In fact, if you insert the special character ^
at the first place of your regex, you will get the negation.
Extra tip: if you also need to lowercase the result, you can make the regex even faster and easier, as long as you won't find any uppercase now.
import re
s = re.sub(r"[^a-z0-9]","",s.lower())
To answer the question How to delete specific columns in vba for excel. I use Array as below.
sub del_col()
dim myarray as variant
dim i as integer
myarray = Array(10, 9, 8)'Descending to Ascending
For i = LBound(myarray) To UBound(myarray)
ActiveSheet.Columns(myarray(i)).EntireColumn.Delete
Next i
end sub
On cmd window (need to run as Administrator),
cd %JAVA_HOME%
only works if you have set up your system environment variable JAVA_HOME . To set up your system variable for your path, you can do this
setx %JAVA_HOME% C:\Java\jdk1.8.0_121\
Then, you can type
cd c:\Java\jdk1.8.0_121\bin
or
cd %JAVA_HOME%\bin
Then, execute any commands provided by JAVA jdk's, such as
keytool -genkey -v -keystore myapp.keystore -alias myapp
You just have to answer the questions (equivalent to typing the values on cmd line) after hitting enter! The key would be generated
You can set the Property FormBorderStyle
to none in the designer,
or in code:
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
if you like to use for URLRequest httpBody
extension Dictionary {
func toString() -> String? {
return (self.compactMap({ (key, value) -> String in
return "\(key)=\(value)"
}) as Array).joined(separator: "&")
}
}
// print: Fields=sdad&ServiceId=1222
A semaphore is a signaling mechanism used to coordinate between threads. Example: One thread is downloading files from the internet and another thread is analyzing the files. This is a classic producer/consumer scenario. The producer calls signal()
on the semaphore when a file is downloaded. The consumer calls wait()
on the same semaphore in order to be blocked until the signal indicates a file is ready. If the semaphore is already signaled when the consumer calls wait, the call does not block. Multiple threads can wait on a semaphore, but each signal will only unblock a single thread.
A counting semaphore keeps track of the number of signals. E.g. if the producer signals three times in a row, wait()
can be called three times without blocking. A binary semaphore does not count but just have the "waiting" and "signalled" states.
A mutex (mutual exclusion lock) is a lock which is owned by a single thread. Only the thread which have acquired the lock can realease it again. Other threads which try to acquire the lock will be blocked until the current owner thread releases it. A mutex lock does not in itself lock anything - it is really just a flag. But code can check for ownership of a mutex lock to ensure that only one thread at a time can access some object or resource.
A monitor is a higher-level construct which uses an underlying mutex lock to ensure thread-safe access to some object. Unfortunately the word "monitor" is used in a few different meanings depending on context and platform and context, but in Java for example, a monitor is a mutex lock which is implicitly associated with an object, and which can be invoked with the synchronized
keyword. The synchronized
keyword can be applied to a class, method or block and ensures only one thread can execute the code at a time.
Try to use this alternate query:
SELECT A.CONTACTID
FROM (SELECT CONTACTID FROM TESTTBL WHERE FLAG = 'VOLUNTEER')A ,
(SELECT CONTACTID FROM TESTTBL WHERE FLAG = 'UPLOADED') B WHERE A.CONTACTID = B.CONTACTID;
Android Studio supports SVG from 1.4 onwards
Here is a video on how to import.
If I'm not mistaken, you should be applying this rule to the li, not the ul.
ul li {list-style-type: disc;}
I got this Error today while installing latest Java 10.0.1 ( downloaded JDK in official oracle website) and also downloaded NetBeans version 8.2.
My JDK installation went as smooth as Cake.
But the problem is in Netbeans installation. When I tried to install Netbeans, the error message showed was: "JDK was not installed on your system. Try using Javahome installer argument". But nothing helped me.
Solution:
final Map<String, String> mss1 = new ProcessBuilder().environment();
mss1.entrySet()
.stream()
//depending on how you want to join K and V use different delimiter
.map(entry ->
String.join(":", entry.getKey(),entry.getValue()))
.forEach(System.out::println);
There are various options are available to test which java version is using your eclipse. The best way is to find first java installed in your machine.
run java -version command on terminal
then to check whether your eclipse pointing to the right version or not.
For that go to
Eclipse >> Preferences >>Java >>Installed JREs
Remove the width and display: block
and then add display: inline-block
to the button. To have it remain centered you can either add text-align: center;
on the body
or do the same on a newly created container.
The advantage of this approach (as opossed to centering with auto margins) is that the button will remain centered regardless of how much text it has.
Example: http://cssdeck.com/labs/2u4kf6dv