public class HcfLcm {
public static void main(String[] args) {
System.out.println("HCF: "+ getHcf(20, 15)); //5
System.out.println("LCM: "+ getLcm2(20, 15)); //60
}
private static Integer getLcm2(int n1, int n2) {
int lcm = Math.max(n1, n2);
// Always true
while (true) {
if (lcm % n1 == 0 && lcm % n2 == 0) {
break;
}
++lcm;
}
return lcm;
}
private static Integer getLcm(int i, int j) {
int hcf = getHcf(i, j);
return hcf * i/hcf * j/hcf; // i*j*hcf
}
private static Integer getHcf(int i, int j) {
while(i%j != 0) {
int temp = i%j;
i = j;
j = temp;
}
return j;
}
}
In Python (modified primes.py):
def gcd(a, b):
"""Return greatest common divisor using Euclid's Algorithm."""
while b:
a, b = b, a % b
return a
def lcm(a, b):
"""Return lowest common multiple."""
return a * b // gcd(a, b)
def lcmm(*args):
"""Return lcm of args."""
return reduce(lcm, args)
Usage:
>>> lcmm(100, 23, 98)
112700
>>> lcmm(*range(1, 20))
232792560
reduce()
works something like that:
>>> f = lambda a,b: "f(%s,%s)" % (a,b)
>>> print reduce(f, "abcd")
f(f(f(a,b),c),d)
not equals
. See here for a list of conditions
select a.ip, a.os, a.hostname, a.port, a.protocol,
b.state
from a
left join b on a.ip = b.ip
and a.port = b.port
I had the same problem of "Unable to ping server at localhost:1099" while I was using intellij 2016 version.
However, as soon as I upgraded it to 2017 version(Ultimate 2017.1) which is installed using "ideaIU-2017.1.exe" the problem disappeared.
One thing that hasn't been explicitly mentioned - the scope feature gives you an option to have the same name for an enum and class method. For instance:
class Test
{
public:
// these call ProcessCommand() internally
void TakeSnapshot();
void RestoreSnapshot();
private:
enum class Command // wouldn't be possible without 'class'
{
TakeSnapshot,
RestoreSnapshot
};
void ProcessCommand(Command cmd); // signal the other thread or whatever
};
Update to latest JUnit version in pom.xml. It works for me.
Run Java with the command-line option -Xmx
, which sets the maximum size of the heap.
There is the $.parseXML
function for this: http://api.jquery.com/jQuery.parseXML/
You can use it like this:
var xml = $.parseXML(yourfile.xml),
$xml = $( xml ),
$test = $xml.find('test');
console.log($test.text());
If you really want an object, you need a plugin for that. This plugin for instance, will convert your XML to JSON: http://www.fyneworks.com/jquery/xml-to-json/
The new git-switch
command (starting in GIT 2.23) also has a flag --discard-changes
which should help you. git pull
might be necessary afterwards.
Warning: it's still considered to be experimental.
To call the method, you need to qualify function with self.
. In addition to that, if you want to pass a filename, add a filename
parameter (or other name you want).
class MyHandler(FileSystemEventHandler):
def on_any_event(self, event):
srcpath = event.src_path
print (srcpath, 'has been ',event.event_type)
print (datetime.datetime.now())
filename = srcpath[12:]
self.dropbox_fn(filename) # <----
def dropbox_fn(self, filename): # <-----
print('In dropbox_fn:', filename)
NVL(length(clob_col_name),0) works for me.
I am using this method
$('.typeahead').typeahead({
hint: true,
highlight: true,
minLength: 1
},
{
name: 'options',
displayKey: 'value',
source: function (query, process) {
return $.get('/weather/searchCity/?q=%QUERY', { query: query }, function (data) {
var matches = [];
$.each(data, function(i, str) {
matches.push({ value: str });
});
return process(matches);
},'json');
}
});
You can also check the check any folder in the system drive like "windows" and "program files". Right click the folder, click on the properties and check under the general tab the date when the folder was created.
I was facing the same problem trying to get around a custom check constraint that I needed to updated to allow different values. Problem is that ALL_CONSTRAINTS does't have a way to tell which column the constraint(s) are applied to. The way I managed to do it is by querying ALL_CONS_COLUMNS instead, then dropping each of the constraints by their name and recreate it.
select constraint_name from all_cons_columns where table_name = [TABLE_NAME] and column_name = [COLUMN_NAME];
I think using
display: inline-block;
would work, however I'm not sure about the browser compatibility.
Another solution would be to wrap your div
in another div
(if you want to maintain the block behavior):
HTML:
<div>
<div class="yourdiv">
content
</div>
</div>
CSS:
.yourdiv
{
display: inline;
}
I recently needed to launch a Bootstrap 5 modal without jQuery and not with a button click (eg, on page load) using Django messages. This is how I did it:
Template/HTML
<div class="modal" id="notification">
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">Notification!</h5>
<button type="button" class="btn-close"
data-bs-dismiss="modal" aria-label="Close"></button>
</div>
<div class="modal-body">
{% for m in messages %}
{{ m }}
{% endfor %}
</div>
<div class="modal-footer justify-content-between">
<a class="float-none btn btn-secondary" href="{% url 'some_view' %}"
type="button">
Link/Button A
</a>
<button type="button" class="btn btn-primary"
data-bs-dismiss="modal">
Link/Button B
</button>
</div>
</div>
</div>
</div>
JS in a file or in the template
{% block javascript %}
{{ block.super }}
<script>
var test_modal = new bootstrap.Modal(
document.getElementById('notification')
)
test_modal.show()
</script>
{% endblock javascript %}
This method will work without the Django template; just use the HTML and put the JS in a file or script
elements that loads after the Bootstrap JS before the end of the body
element.
Which parameter between (data / json / files) should be used,it's actually depends on a request header named ContentType(usually check this through developer tools of your browser),
when the Content-Type is application/x-www-form-urlencoded, code should be:
requests.post(url, data=jsonObj)
when the Content-Type is application/json, your code is supposed to be one of below:
requests.post(url, json=jsonObj)
requests.post(url, data=jsonstr, headers={"Content-Type":"application/json"})
when the Content-Type is multipart/form-data, it's used to upload files, so your code should be:
requests.post(url, files=xxxx)
If you're not using a remote repository (like artifactory), use plain old:
mvn clean install
Pretty old topic but AFAIK, if you run your own repository (eg: with artifactory) to share jar among your team(s), you might want to use
mvn clean deploy
instead.
This way, your continuous integration server can be sure that all dependencies are correctly pushed into your remote repository. If you missed one, mvn will not be able to find it into your CI local m2 repository.
Currency pipe uses the number
one internally for number formatting. So you can use it like this:
{{ number | number : '1.2-2'}}
By far the simplest (works for python) is '123-(apple|banana)-?456'
.
While my answer isn't 100% applicable, but most search engines find this as the first hit, I decided to post it nontheless:
If you're using PrimeFaces (or some similar API) p:commandButton
or p:commandLink
, chances are that you have forgotten to explicitly add process="@this"
to your command components.
As the PrimeFaces User's Guide states in section 3.18, the defaults for process
and update
are both @form
, which pretty much opposes the defaults you might expect from plain JSF f:ajax
or RichFaces, which are execute="@this"
and render="@none"
respectively.
Just took me a looong time to find out. (... and I think it's rather unclever to use defaults that are different from JSF!)
search property of type URLSearchParams in RequestOptions class is deprecated in angular 4. Instead, you should use params property of type URLSearchParams.
Add the item first and then serialize:
$.ajax({
type: 'POST',
url: this.action,
data: $.extend($(this), {'NonFormValue': NonFormValue}).serialize()
});
Simply type start
in the command prompt:
start
This will open up new cmd
windows.
I tried /etc/profile
, ~/.profile
and ~/.bash_profile
and none of those worked. I found that editing ~/.bashrc
for the jenkins slave account did.
Solution that works by only using CSS:
A: Inline CSS
<select>_x000D_
<option style="display:none;"></option>_x000D_
<option>Option 1</option>_x000D_
<option>Option 2</option>_x000D_
<option>Option 3</option>_x000D_
</select>
_x000D_
B: CSS Style Sheet
If you have a CSS file at hand, you can target the first option
using:
select.first-opt-hidden option:first-of-type {_x000D_
display:none;_x000D_
}
_x000D_
<select class="first-opt-hidden">_x000D_
<option></option>_x000D_
<option>Option 1</option>_x000D_
<option>Option 2</option>_x000D_
<option>Option 3</option>_x000D_
</select>
_x000D_
You can use Hyperlink instead of Button, like this:
<TextBlock>
<Hyperlink TextDecorations="{x:Null}">
<Image Width="16"
Height="16"
Margin="3"
Source="/YourProjectName;component/Images/close-small.png" />
</Hyperlink>
</TextBlock>
In my case it was an old dependency that was using compile for the transitive dependencies : com.jakewharton.hugo
After removing it from my gradle it compiled.
Check the document encoding.
I had this same problem. I develop on Windows XP using Notepad++ and WampServer to run Apache locally and all was fine. After uploading to hosting provider that uses Apache on Unix I got this error. I had no extra PHP tags or white-space from extra lines after the closing tag.
For me this was caused by the encoding of the text documents. I used the "Convert to UTF-8 without BOM" option in Notepad++(under Encoding tab) and reloaded to the web server. Problem fixed, no code/editing changes required.
For Capitalisation in EditText you can choose the below two input types:
- android:inputType="textCapSentences"
- android:inputType="textCapWords"
textCapSentences
This will let the first letter of the first word as Capital in every sentence.
textCapWords This will let the first letter of every word as Capital.
If you want both the attributes just use | sign with both the attributes
android:inputType="textCapSentences|textCapWords"
Let's fill in the gaps in your code, by adding the other branches in the logic, and see what happens:
SQL> DECLARE
2 str1 varchar2(4000);
3 str2 varchar2(4000);
4 BEGIN
5 str1:='';
6 str2:='sdd';
7 IF(str1<>str2) THEN
8 dbms_output.put_line('The two strings is not equal');
9 ELSIF (str1=str2) THEN
10 dbms_output.put_line('The two strings are the same');
11 ELSE
12 dbms_output.put_line('Who knows?');
13 END IF;
14 END;
15 /
Who knows?
PL/SQL procedure successfully completed.
SQL>
So the two strings are neither the same nor are they not the same? Huh?
It comes down to this. Oracle treats an empty string as a NULL. If we attempt to compare a NULL and another string the outcome is not TRUE nor FALSE, it is NULL. This remains the case even if the other string is also a NULL.
You can use DataSet.Tables(0).Columns.Contains(name)
to check whether the DataTable
contains a column with a particular name.
https://3v4l.org/VsQLb Example Here
function listdirs($dir) {
static $alldirs = array();
$dirs = glob($dir . '/*', GLOB_ONLYDIR);
if (count($dirs) > 0) {
foreach ($dirs as $d) $alldirs[] = $d;
}
foreach ($dirs as $dir) listdirs($dir);
return $alldirs;
}
There is no way to get the old password back. Log into the SQL server management console as a machine or domain admin using integrated authentication, you can then change any password (including sa).
Start the SQL service again and use the new created login (recovery in my example) Go via the security panel to the properties and change the password of the SA account.
Now write down the new SA password.
hash foo 2>/dev/null
: works with Z shell (Zsh), Bash, Dash and ash.
type -p foo
: it appears to work with Z shell, Bash and ash (BusyBox), but not Dash (it interprets -p
as an argument).
command -v foo
: works with Z shell, Bash, Dash, but not ash (BusyBox) (-ash: command: not found
).
Also note that builtin
is not available with ash and Dash.
You can use JSONPath
Doing something like this:
results = JSONPath(null, TestObj, "$..[?(@.id=='A')]")
Note that JSONPath returns an array of results
(I have not tested the expression "$..[?(@.id=='A')]" btw. Maybe it needs to be fine-tuned with the help of a browser console)
As the other answers point out, once the resources are inside a jar file, things get really ugly. In our case, this solution:
https://stackoverflow.com/a/13227570/516188
works very well in the tests (since when the tests are run the code is not packed in a jar file), but doesn't work when the app actually runs normally. So what I've done is... I hardcode the list of the files in the app, but I have a test which reads the actual list from disk (can do it since that works in tests) and fails if the actual list doesn't match with the list the app returns.
That way I have simple code in my app (no tricks), and I'm sure I didn't forget to add a new entry in the list thanks to the test.
You should use "text/csv" according to RFC 4180.
This worked for me, May help you too :
Swift 4+ :
self.tableView.register(UITableViewCell.self, forCellWithReuseIdentifier: "cell")
Swift 3 :
self.tableView.register(UITableViewCell.classForKeyedArchiver(), forCellReuseIdentifier: "Cell")
Swift 2.2 :
self.tableView.registerClass(UITableViewCell.classForKeyedArchiver(), forCellReuseIdentifier: "Cell")
We have to Set Identifier property to Table View Cell as per below image,
let imageDataDict:[String: UIImage] = ["image": image]
// post a notification
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "notificationName"), object: nil, userInfo: imageDataDict)
// `default` is now a property, not a method call
// Register to receive notification in your class
NotificationCenter.default.addObserver(self, selector: #selector(self.showSpinningWheel(_:)), name: NSNotification.Name(rawValue: "notificationName"), object: nil)
// handle notification
func showSpinningWheel(_ notification: NSNotification) {
print(notification.userInfo ?? "")
if let dict = notification.userInfo as NSDictionary? {
if let id = dict["image"] as? UIImage{
// do something with your image
}
}
}
let imageDataDict:[String: UIImage] = ["image": image]
// post a notification
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "notificationName"), object: nil, userInfo: imageDataDict)
// `default` is now a property, not a method call
// Register to receive notification in your class
NotificationCenter.default.addObserver(self, selector: #selector(self.showSpinningWheel(_:)), name: NSNotification.Name(rawValue: "notificationName"), object: nil)
// handle notification
@objc func showSpinningWheel(_ notification: NSNotification) {
print(notification.userInfo ?? "")
if let dict = notification.userInfo as NSDictionary? {
if let id = dict["image"] as? UIImage{
// do something with your image
}
}
}
Entire request and response is encrypted, including URL.
Note that when you use a HTTP Proxy, it knows the address (domain) of the target server, but doesn't know the requested path on this server (i.e. request and response are always encrypted).
Try filtering out the rows that contain strings with the delimiter and work on those only like:
SELECT SUBSTRING(myColumn, 1, CHARINDEX('/', myColumn)-1) AS FirstName,
SUBSTRING(myColumn, CHARINDEX('/', myColumn) + 1, 1000) AS LastName
FROM MyTable
WHERE CHARINDEX('/', myColumn) > 0
Or
SELECT SUBSTRING(myColumn, 1, CHARINDEX('/', myColumn)-1) AS FirstName,
SUBSTRING(myColumn, CHARINDEX('/', myColumn) + 1, 1000) AS LastName
FROM MyTable
WHERE myColumn LIKE '%/%'
When you first read the body, you have to store it so once you're done with it, you can set a new io.ReadCloser
as the request body constructed from the original data. So when you advance in the chain, the next handler can read the same body.
One option is to read the whole body using ioutil.ReadAll()
, which gives you the body as a byte slice.
You may use bytes.NewBuffer()
to obtain an io.Reader
from a byte slice.
The last missing piece is to make the io.Reader
an io.ReadCloser
, because bytes.Buffer
does not have a Close()
method. For this you may use ioutil.NopCloser()
which wraps an io.Reader
, and returns an io.ReadCloser
, whose added Close()
method will be a no-op (does nothing).
Note that you may even modify the contents of the byte slice you use to create the "new" body. You have full control over it.
Care must be taken though, as there might be other HTTP fields like content-length and checksums which may become invalid if you modify only the data. If subsequent handlers check those, you would also need to modify those too!
If you also want to read the response body, then you have to wrap the http.ResponseWriter
you get, and pass the wrapper on the chain. This wrapper may cache the data sent out, which you can inspect either after, on on-the-fly (as the subsequent handlers write to it).
Here's a simple ResponseWriter
wrapper, which just caches the data, so it'll be available after the subsequent handler returns:
type MyResponseWriter struct {
http.ResponseWriter
buf *bytes.Buffer
}
func (mrw *MyResponseWriter) Write(p []byte) (int, error) {
return mrw.buf.Write(p)
}
Note that MyResponseWriter.Write()
just writes the data to a buffer. You may also choose to inspect it on-the-fly (in the Write()
method) and write the data immediately to the wrapped / embedded ResponseWriter
. You may even modify the data. You have full control.
Care must be taken again though, as the subsequent handlers may also send HTTP response headers related to the response data –such as length or checksums– which may also become invalid if you alter the response data.
Putting the pieces together, here's a full working example:
func loginmw(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Printf("Error reading body: %v", err)
http.Error(w, "can't read body", http.StatusBadRequest)
return
}
// Work / inspect body. You may even modify it!
// And now set a new body, which will simulate the same data we read:
r.Body = ioutil.NopCloser(bytes.NewBuffer(body))
// Create a response wrapper:
mrw := &MyResponseWriter{
ResponseWriter: w,
buf: &bytes.Buffer{},
}
// Call next handler, passing the response wrapper:
handler.ServeHTTP(mrw, r)
// Now inspect response, and finally send it out:
// (You can also modify it before sending it out!)
if _, err := io.Copy(w, mrw.buf); err != nil {
log.Printf("Failed to send out response: %v", err)
}
})
}
I know the competition is closed for some years. …
Nonetheless this is my suggestion for a pure python prime sieve, based on omitting the multiples of 2, 3 and 5 by using appropriate steps while processing the sieve forward. Nonetheless it is actually slower for N<10^9 than @Robert William Hanks superior solutions rwh_primes2 and rwh_primes1. By using a ctypes.c_ushort sieve array above 1.5* 10^8 it is somehow adaptive to memory limits.
10^6
$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.primeSieveSeq(1000000)" 10 loops, best of 3: 46.7 msec per loop
to compare:$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes1(1000000)" 10 loops, best of 3: 43.2 msec per loop to compare: $ python -m timeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes2(1000000)" 10 loops, best of 3: 34.5 msec per loop
10^7
$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.primeSieveSeq(10000000)" 10 loops, best of 3: 530 msec per loop
to compare:$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes1(10000000)" 10 loops, best of 3: 494 msec per loop to compare: $ python -m timeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes2(10000000)" 10 loops, best of 3: 375 msec per loop
10^8
$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.primeSieveSeq(100000000)" 10 loops, best of 3: 5.55 sec per loop
to compare: $ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes1(100000000)" 10 loops, best of 3: 5.33 sec per loop to compare: $ python -m timeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes2(100000000)" 10 loops, best of 3: 3.95 sec per loop
10^9
$ python -mtimeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.primeSieveSeq(1000000000)" 10 loops, best of 3: 61.2 sec per loop
to compare: $ python -mtimeit -n 3 -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes1(1000000000)" 3 loops, best of 3: 97.8 sec per loop
to compare: $ python -m timeit -s"import primeSieveSpeedComp" "primeSieveSpeedComp.rwh_primes2(1000000000)" 10 loops, best of 3: 41.9 sec per loop
You may copy the code below into ubuntus primeSieveSpeedComp to review this tests.
def primeSieveSeq(MAX_Int):
if MAX_Int > 5*10**8:
import ctypes
int16Array = ctypes.c_ushort * (MAX_Int >> 1)
sieve = int16Array()
#print 'uses ctypes "unsigned short int Array"'
else:
sieve = (MAX_Int >> 1) * [False]
#print 'uses python list() of long long int'
if MAX_Int < 10**8:
sieve[4::3] = [True]*((MAX_Int - 8)/6+1)
sieve[12::5] = [True]*((MAX_Int - 24)/10+1)
r = [2, 3, 5]
n = 0
for i in xrange(int(MAX_Int**0.5)/30+1):
n += 3
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 2
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 1
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 2
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 1
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 2
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 3
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
n += 1
if not sieve[n]:
n2 = (n << 1) + 1
r.append(n2)
n2q = (n2**2) >> 1
sieve[n2q::n2] = [True]*(((MAX_Int >> 1) - n2q - 1) / n2 + 1)
if MAX_Int < 10**8:
return [2, 3, 5]+[(p << 1) + 1 for p in [n for n in xrange(3, MAX_Int >> 1) if not sieve[n]]]
n = n >> 1
try:
for i in xrange((MAX_Int-2*n)/30 + 1):
n += 3
if not sieve[n]:
r.append((n << 1) + 1)
n += 2
if not sieve[n]:
r.append((n << 1) + 1)
n += 1
if not sieve[n]:
r.append((n << 1) + 1)
n += 2
if not sieve[n]:
r.append((n << 1) + 1)
n += 1
if not sieve[n]:
r.append((n << 1) + 1)
n += 2
if not sieve[n]:
r.append((n << 1) + 1)
n += 3
if not sieve[n]:
r.append((n << 1) + 1)
n += 1
if not sieve[n]:
r.append((n << 1) + 1)
except:
pass
return r
sudo nano /etc/redis/redis.conf
find and uncomment line # requirepass foobared
, then restart server
now you password is foobared
Let's talk in from company concept. Log gives you flexible levels (see Difference between logger.info and logger.debug). Different people want to see different levels, like QAs, developers, business people. But e.printStackTrace() will print out everything. Also, like if this method will be restful called, this same error may print several times. Then the Devops or Tech-Ops people in your company may be crazy because they will receive the same error reminders.
I think a better replacement could be log.error("errors happend in XXX", e)
This will also print out whole information which is easy reading than e.printStackTrace()
There might be another way, but this should work:
SELECT [Title], [Firstname], [Surname], [Company_name], [Interest]
FROM [dbo].[EXTRANET]
WHERE day(Submission_date)=day(now) and
month(Submission_date)=month(now)
and year(Submission_date)=year(now)
I was trying the white-space: pre-wrap;
technique stated by pete but if the string was continuous and long it just ran out of the container, and didn't warp for whatever reason, didn't have much time to investigate.. but if you too are having the same problem, I ended up using the <pre>
tags and the following css and everything was good to go..
pre {
font-size: inherit;
color: inherit;
border: initial;
padding: initial;
font-family: inherit;
}
As many answers pointed this out: You build Dockerfile to get an image and you run image to get a container.
However, following steps helped me get a better feel for what Docker image and container are:
1) Build Dockerfile:
docker build -t my_image dir_with_dockerfile
2) Save the image to .tar
file
docker save -o my_file.tar my_image_id
my_file.tar
will store the image. Open it with tar -xvf my_file.tar
, and you will get to see all the layers. If you dive deeper into each layer you can see what changes were added in each layer. (They should be pretty close to commands in the Dockerfile).
3) To take a look inside of a container, you can do:
sudo docker run -it my_image bash
and you can see that is very much like an OS.
You can check the Ascii value by e.keychar on KeyPress event of TextBox.
By checking the AscII value you can check for number or character.
Similarly you can write logic to check the Email ID.
No, there is no built in conversion for this. You'll need to create a constructor, like you mentioned, or some other conversion method.
Also, since BaseClass is not a DerivedClass, myDerivedObject will be null, andd the last line above will throw a null ref exception.
I know this was already answered as to what the actual problem is, however I want to offer a simple workaround.
I wanted to use the get_results() method however I didn't have the driver, and I'm not somewhere I can get that added. So, before I called
$stmt->bind_results($var1,$var2,$var3,$var4...etc);
I created an empty array, and then just bound the results as keys in that array:
$result = array();
$stmt->bind_results($result['var1'],$result['var2'],$result['var3'],$result['var4']...etc);
so that those results could easily be passed into methods or cast to an object for further use.
Hope this helps anyone who's looking to do something similar.
If you want to use straight PowerShell check out the below code.
$content = Get-Content C:\Users\You\Documents\test.txt
foreach ($line in $content)
{
Write-Host $line
}
@HostListener
is a decorator for the callback/event handler method, so remove the ;
at the end of this line:
@HostListener('click', ['$event.target']);
Here's a working plunker that I generated by copying the code from the API docs, but I put the onClick()
method on the same line for clarity:
import {Component, HostListener, Directive} from 'angular2/core';
@Directive({selector: 'button[counting]'})
class CountClicks {
numberOfClicks = 0;
@HostListener('click', ['$event.target']) onClick(btn) {
console.log("button", btn, "number of clicks:", this.numberOfClicks++);
}
}
@Component({
selector: 'my-app',
template: `<button counting>Increment</button>`,
directives: [CountClicks]
})
export class AppComponent {
constructor() { console.clear(); }
}
Host binding can also be used to listen to global events:
To listen to global events, a target must be added to the event name. The target can be window, document or body (reference)
@HostListener('document:keyup', ['$event'])
handleKeyboardEvent(kbdEvent: KeyboardEvent) { ... }
If you have a foreign key definition in some table and the name of the foreign key is used elsewhere as another foreign key you will have this error.
the simplest solution to both horizontally and vertically centers the icon:
<div class="d-flex align-items-center justify-content-center">
<i class="fas fa-crosshairs fa-lg"></i>
</div>
You have to use babel-preset-env and nodemon for hot-reload.
Then create .babelrc file with below content:
{
"presets": ["env"]
}
Finally, create script in package.json:
"scripts": {
"babel-node": "babel-node --presets=env",
"start": "nodemon --exec npm run babel-node -- ./index.js",
"build": "babel src -d dist"
}
Or just use this boilerplate:
X509Certificate clientKey1 = null;
clientKey1 = new X509Certificate(AppSetting["certificatePath"],
AppSetting["pswd"]);
string url = "https://EndPointAddress";
FileStream fs = File.OpenRead(FilePath);
var streamContent = new StreamContent(fs);
var FileContent = new ByteArrayContent(streamContent.ReadAsByteArrayAsync().Result);
FileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("ContentType");
var handler = new WebRequestHandler();
handler.ClientCertificateOptions = ClientCertificateOption.Manual;
handler.ClientCertificates.Add(clientKey1);
handler.ServerCertificateValidationCallback = (httpRequestMessage, cert, cetChain, policyErrors) =>
{
return true;
};
using (var client = new HttpClient(handler))
{
// Post it
HttpResponseMessage httpResponseMessage = client.PostAsync(url, FileContent).Result;
if (!httpResponseMessage.IsSuccessStatusCode)
{
string ss = httpResponseMessage.StatusCode.ToString();
}
}
I used RestAssured most of the time to parse rest service response and test the services. Apart from Rest Assured, I used below libraries too to communicate with Resful services.
jasonmp85 is right about passing a different array to String.format
. The size of an array can't be changed once constructed, so you'd have to pass a new array instead of modifying the existing one.
Object newArgs = new Object[args.length+1];
System.arraycopy(args, 0, newArgs, 1, args.length);
newArgs[0] = extraVar;
String.format(format, extraVar, args);
$ export VAR=/home/me/mydir/file.c
$ export DIR=${VAR%/*}
$ echo "${DIR}"
/home/me/mydir
$ echo "${VAR##*/}"
file.c
To avoid dependency with basename
and dirname
SET @pos := 0;
UPDATE TABLE_NAME SET Roll_No = ( SELECT @pos := @pos + 1 ) ORDER BY First_Name ASC;
In the above example query simply update the student Roll_No column depending on the student Frist_Name column. From 1 to No_of_records in the table. I hope it's clear now.
I found that I initialised my slider using inline script in the body, which meant it was being called before slick.js had been loaded. I fixed using inline JS in the footer to initialise the slider after including the slick.js file.
<script type="text/javascript" src="/slick/slick.min.js"></script>
<script>
$('.autoplay').slick({
slidesToShow: 1,
slidesToScroll: 1,
autoplay: true,
autoplaySpeed: 4000,
});
</script>
nohup working i checked in AWS Ubunto vm follow the correct
syntax
ubuntu@ip-172-00-00-00:~/ms$ nohup node server.js &
then press enter you will see this line
ubuntu@ip-172-00-00-00:~/ms$ nohup: ignoring input and appending output to ‘nohup.out’
then type this
rm nohup.out
This worked for me - Swift 3
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let headerCell = tableView.dequeueReusableCell(withIdentifier: "customTableCell") as! CustomTableCell
return headerCell
}
I'm not entirely sure of the general purpose of the function, but you could always do this:
function getMachine(color, qty) {
var retval;
$("#getMachine li").each(function() {
var thisArray = $(this).text().split("~");
if(thisArray[0] == color&& qty>= parseInt(thisArray[1]) && qty<= parseInt(thisArray[2])) {
retval = thisArray[3];
return false;
}
});
return retval;
}
var retval = getMachine(color, qty);
First, we need to filter the XML so as to parse that change objects become array
//catch xml
$xmlElement = file_get_contents ('php://input');
//change become array
$Data = (array)simplexml_load_string($xmlElement);
//and see
print_r($Data);
One answer I'm missing here: Multi-layer perceptron is able to find relation between features. For example it is necessary in computer vision when a raw image is provided to the learning algorithm and now Sophisticated features are calculated. Essentially the intermediate levels can calculate new unknown features.
Every one please avoid modifying post buffer and advising it to others. It may help in some cases but it breaks others. If you have modified your post buffer for pushing your large project. Undo it using following command.
git config --global --unset http.postBuffer
git config --local --unset http.postBuffer
I modified my post buffer to fix one of the issues I had with git but it was the reason for my future problems with git.
Yes, you have to get all records, update them and then call SaveChanges
.
a = [2 3 5];
b = [1 1 0];
c = a+b;
starts = zeros(3,3);
ends = [a;b;c];
quiver3(starts(:,1), starts(:,2), starts(:,3), ends(:,1), ends(:,2), ends(:,3))
axis equal
If you don't have another time interval bigger than days:
int days = (int) (milliseconds / (1000*60*60*24));
If you have weeks too:
int days = (int) ((milliseconds / (1000*60*60*24)) % 7);
int weeks = (int) (milliseconds / (1000*60*60*24*7));
It's probably best to avoid using months and years if possible, as they don't have a well-defined fixed length. Strictly speaking neither do days: daylight saving means that days can have a length that is not 24 hours.
Just add the following rules to the parent element:
display: flex;
justify-content: center; /* align horizontal */
align-items: center; /* align vertical */
Here's a sample demo (Resize window to see the image align)
Browser support for Flexbox nowadays is quite good.
For cross-browser compatibility for display: flex
and align-items
, you can add the older flexbox syntax as well:
display: -webkit-box;
display: -webkit-flex;
display: -moz-box;
display: -ms-flexbox;
display: flex;
-webkit-flex-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
You can use regular expressions. Use Matcher and Pattern methods to get the desired output
These answers does not work if i don't have addToBackStack() added to my fragment transaction but, you can use:
getActivity().onBackPressed();
from your any fragment to go back one step;
Java, for sure, without a doubt, is "pass by value". Also, since Java is (mostly) object-oriented and objects work with references, it's easy to get confused and think of it to be "pass by reference"
Pass by value means you pass the value to the method and if the method changes the passed value, the real entity doesn't change. Pass by reference, on the other hand, means a reference is passed to the method, and if the method changes it, the passed object also changes.
In Java, usually when we pass an object to a method, we basically pass the reference of the object as-a-value because that's how Java works; it works with references and addresses as far as Object in the heap goes.
But to test if it is really pass by value or pass by reference, you can use a primitive type and references:
@Test
public void sampleTest(){
int i = 5;
incrementBy100(i);
System.out.println("passed ==> "+ i);
Integer j = new Integer(5);
incrementBy100(j);
System.out.println("passed ==> "+ j);
}
/**
* @param i
*/
private void incrementBy100(int i) {
i += 100;
System.out.println("incremented = "+ i);
}
The output is:
incremented = 105
passed ==> 5
incremented = 105
passed ==> 5
So in both cases, whatever happens inside the method doesn't change the real Object, because the value of that object was passed, and not a reference to the object itself.
But when you pass a custom object to a method, and the method and changes it, it will change the real object too, because even when you passed the object, you passed it's reference as a value to the method. Let's try another example:
@Test
public void sampleTest2(){
Person person = new Person(24, "John");
System.out.println(person);
alterPerson(person);
System.out.println(person);
}
/**
* @param person
*/
private void alterPerson(Person person) {
person.setAge(45);
Person altered = person;
altered.setName("Tom");
}
private static class Person{
private int age;
private String name;
public Person(int age, String name) {
this.age=age;
this.name =name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Person [age=");
builder.append(age);
builder.append(", name=");
builder.append(name);
builder.append("]");
return builder.toString();
}
}
In this case, the output is:
Person [age=24, name=John]
Person [age=45, name=Tom]
The problem is that img tag is inline element and you can't restrict width of inline element.
So to restrict img tag width first you need to convert it into a inline-block element
img.Image{
display: inline-block;
}
JetBrains has a new application called the Toolbox App which quickly and easily installs any JetBrains software you want, assuming you have the license. It also manages your login once to apply across all JetBrains software, a very useful feature.
To use it, download the tar.gz file here, then extract it and run the included executable jetbrains-toolbox.
Then sign in, and press install next to IntelliJ IDEA:
If you want to move the executable to /usr/bin/
feel free, however it works fine out of the box wherever you extract it to.
This will also make the appropriate desktop entries upon install.
Try path._makeLong('some_filename_on_root.js');
example:
cons path = require('path');
console.log(path._makeLong('some_filename_on_root.js');
That will return full path from root of your node application (same position of package.json)
In an Aggregate query, (Any query Where an aggregate function is used) Predicates in a where clause are evaluated before the aggregated intermediate result set is generated,
Predicates in a Having clause are applied to the aggregate result set AFTER it has been generated. That's why predicate conditions on aggregate values must be placed in Having clause, not in the Where clause, and why you can use aliases defined in the Select clause in a Having Clause, but not in a Where Clause.
I was also facing the same issue until I added the type="module" to the script.
Before it was like this
<script src="../src/main.js"></script>
And after changing it to
<script type="module" src="../src/main.js"></script>
It worked perfectly.
Take a look on life cycle of Activity
Where
***onCreate()***
Called when the activity is first created. This is where you should do all of your normal static set up: create views, bind data to lists, etc. This method also provides you with a Bundle containing the activity's previously frozen state, if there was one. Always followed by onStart().
***onStart()***
Called when the activity is becoming visible to the user. Followed by onResume() if the activity comes to the foreground, or onStop() if it becomes hidden.
And you can write your simple class to take a look when these methods call
public class TestActivity extends Activity {
/** Called when the activity is first created. */
private final static String TAG = "TestActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i(TAG, "On Create .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onDestroy()
*/
@Override
protected void onDestroy() {
super.onDestroy();
Log.i(TAG, "On Destroy .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onPause()
*/
@Override
protected void onPause() {
super.onPause();
Log.i(TAG, "On Pause .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onRestart()
*/
@Override
protected void onRestart() {
super.onRestart();
Log.i(TAG, "On Restart .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onResume()
*/
@Override
protected void onResume() {
super.onResume();
Log.i(TAG, "On Resume .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onStart()
*/
@Override
protected void onStart() {
super.onStart();
Log.i(TAG, "On Start .....");
}
/* (non-Javadoc)
* @see android.app.Activity#onStop()
*/
@Override
protected void onStop() {
super.onStop();
Log.i(TAG, "On Stop .....");
}
}
Hope this will clear your confusion.
And take a look here for details.
Lifecycle Methods in Details is a very good example and demo application, which is a very good article to understand the life cycle.
I had yet another issue with the same error!
Turns out I had created a property on a model, but was stupidly calling that property with parentheses.
Hope this helps someone!
(Posted answer on behalf of the OP).
I am able to send data now. This is my new version of the program thanks to your answers and the code of @Maksims Mihejevs.
using System;
using System.Net.Sockets;
using System.Net;
using System.Security.Cryptography;
using System.Threading;
namespace ConsoleApplication1
{
class Program
{
static Socket serverSocket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.IP);
static private string guid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
static void Main(string[] args)
{
serverSocket.Bind(new IPEndPoint(IPAddress.Any, 8080));
serverSocket.Listen(128);
serverSocket.BeginAccept(null, 0, OnAccept, null);
Console.Read();
}
private static void OnAccept(IAsyncResult result)
{
byte[] buffer = new byte[1024];
try
{
Socket client = null;
string headerResponse = "";
if (serverSocket != null && serverSocket.IsBound)
{
client = serverSocket.EndAccept(result);
var i = client.Receive(buffer);
headerResponse = (System.Text.Encoding.UTF8.GetString(buffer)).Substring(0,i);
// write received data to the console
Console.WriteLine(headerResponse);
}
if (client != null)
{
/* Handshaking and managing ClientSocket */
var key = headerResponse.Replace("ey:", "`")
.Split('`')[1] // dGhlIHNhbXBsZSBub25jZQ== \r\n .......
.Replace("\r", "").Split('\n')[0] // dGhlIHNhbXBsZSBub25jZQ==
.Trim();
// key should now equal dGhlIHNhbXBsZSBub25jZQ==
var test1 = AcceptKey(ref key);
var newLine = "\r\n";
var response = "HTTP/1.1 101 Switching Protocols" + newLine
+ "Upgrade: websocket" + newLine
+ "Connection: Upgrade" + newLine
+ "Sec-WebSocket-Accept: " + test1 + newLine + newLine
//+ "Sec-WebSocket-Protocol: chat, superchat" + newLine
//+ "Sec-WebSocket-Version: 13" + newLine
;
// which one should I use? none of them fires the onopen method
client.Send(System.Text.Encoding.UTF8.GetBytes(response));
var i = client.Receive(buffer); // wait for client to send a message
// once the message is received decode it in different formats
Console.WriteLine(Convert.ToBase64String(buffer).Substring(0, i));
Console.WriteLine("\n\nPress enter to send data to client");
Console.Read();
var subA = SubArray<byte>(buffer, 0, i);
client.Send(subA);
Thread.Sleep(10000);//wait for message to be send
}
}
catch (SocketException exception)
{
throw exception;
}
finally
{
if (serverSocket != null && serverSocket.IsBound)
{
serverSocket.BeginAccept(null, 0, OnAccept, null);
}
}
}
public static T[] SubArray<T>(T[] data, int index, int length)
{
T[] result = new T[length];
Array.Copy(data, index, result, 0, length);
return result;
}
private static string AcceptKey(ref string key)
{
string longKey = key + guid;
byte[] hashBytes = ComputeHash(longKey);
return Convert.ToBase64String(hashBytes);
}
static SHA1 sha1 = SHA1CryptoServiceProvider.Create();
private static byte[] ComputeHash(string str)
{
return sha1.ComputeHash(System.Text.Encoding.ASCII.GetBytes(str));
}
}
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function connect() {
var ws = new WebSocket("ws://localhost:8080/service");
ws.onopen = function () {
alert("About to send data");
ws.send("Hello World"); // I WANT TO SEND THIS MESSAGE TO THE SERVER!!!!!!!!
alert("Message sent!");
};
ws.onmessage = function (evt) {
alert("About to receive data");
var received_msg = evt.data;
alert("Message received = "+received_msg);
};
ws.onclose = function () {
// websocket is closed.
alert("Connection is closed...");
};
};
</script>
</head>
<body style="font-size:xx-large" >
<div>
<a href="#" onclick="connect()">Click here to start</a></div>
</body>
</html>
When I run that code I am able to send and receive data from both the client and the server. The only problem is that the messages are encrypted when they arrive to the server. Here are the steps of how the program runs:
Note how the message from the client is encrypted.
If you already have web.xml under /src/main/webapp/WEB-INF but you still get error "web.xml is missing and is set to true", you could check if you have included /src/main/webapp in your project source.
Here are the steps you can follow:
(I verified this with Eclipse Mars)
add to Manifest for your activity android:launchMode="singleTask"
Alternatively, you could override your spinner adapter, and provide an empty view for position 0 in your getView method, and a view with 0dp height in the getDropDownView
method.
This way, you have an initial text such as "Select an Option..." that shows up when the spinner is first loaded, but it is not an option for the user to choose (technically it is, but because the height is 0, they can't see it).
You can do replace tabs with spaces in all project files by:
Ctrl+Shif+F
^\A(.*)$
Your dir
Replace by \1
This will cause all project files to be opened, with their buffer marked as dirty. With this, you can now optionally enable these next Sublime Text settings, to trim all files trailing white space and ensure a new line at the end of every file.
You can enabled these settings by going on the menu Preferences -> Settings
and adding these contents to your settings file:
"ensure_newline_at_eof_on_save": true,
"trim_trailing_white_space_on_save": true,
View -> Show Console (Ctrl+`)
and run the command:
import threading; threading.Thread( args=(set(),), target=lambda counterset: [ (view.run_command( "expand_tabs", {"set_translate_tabs": True} ), print( "Processing {:>5} view of {:>5}, view id {} {}".format( len( counterset ) + 1, len( window.views() ), view.id(), ( "Finished converting!" if len( counterset ) > len( window.views() ) - 2 else "" ) ) ), counterset.add( len( counterset ) ) ) for view in window.views() ] ).start()
File -> Save All
What do you want to fade? The background
or color
attribute?
Currently you're changing the background color, but telling it to transition the color property. You can use all
to transition all properties.
.clicker {
-moz-transition: all .2s ease-in;
-o-transition: all .2s ease-in;
-webkit-transition: all .2s ease-in;
transition: all .2s ease-in;
background: #f5f5f5;
padding: 20px;
}
.clicker:hover {
background: #eee;
}
Otherwise just use transition: background .2s ease-in
.
if ( params.build_deploy == '1' ) {
println "build_deploy ? ${params.build_deploy}"
jobB = build job: 'k8s-core-user_deploy', propagate: false, wait: true, parameters: [
string(name:'environment', value: "${params.environment}"),
string(name:'branch_name', value: "${params.branch_name}"),
string(name:'service_name', value: "${params.service_name}"),
]
println jobB.getResult()
}
No need to use expensive regex
, if barely needed then try-
Use r'(/)(?=$)'
pattern that is capture last /
and replace with r''
i.e. blank character.
>>>re.sub(r'(/)(?=$)',r'','/home/ro/A_Python_Scripts/flask-auto/myDirectory/scarlett Johanson/1448543562.17.jpg/')
>>>'/home/ro/A_Python_Scripts/flask-auto/myDirectory/scarlett Johanson/1448543562.17.jpg'
It is true that if you present a view controller modally on the iPhone, it will always be presented full screen no matter how you present it on the top view controller of a navigation controller or any other way around. But you can always show the navigation bar with the following workaround way:
Rather than presenting that view controller modally present a navigation controller modally with its root view controller set as the view controller you want:
MyViewController *myViewController = [[MyViewController alloc] initWithNibName:nil bundle:nil];
UINavigationController *navigationController =
[[UINavigationController alloc] initWithRootViewController:myViewController];
//now present this navigation controller modally
[self presentViewController:navigationController
animated:YES
completion:^{
}];
You should see a navigation bar when your view is presented modally.
https://github.com/robertleeplummerjr/wiretap.js
new Wiretap({
add: function() {
//fire when an event is bound to element
},
before: function() {
//fire just before an event executes, arguments are automatic
},
after: function() {
//fire just after an event executes, arguments are automatic
}
});
I have faced the same problem when I tape the URL
https://www.nameDomain.com/phpmyadmin
the forbidden message shows up, because of the rules on /use/share/phpMyAdmin directory
I fix it by adding in this file /etc/httpd/conf.d/phpMyAdmin.conf
in this section
<Directory /usr/share/phpMyAdmin/>
....
</Directory>
these line of rules
<Directory /usr/share/phpMyAdmin/>
Order Deny,Allow
Deny from All
Allow from 127.0.0.1
Allow from ::1
Allow from All
...
</Directory>
you save the file, then you restart the apache service whatever method you choose service httpd graceful
or service httpd restart
it depends on your policy
for security reasons you can specify one connection by setting one IP address if your IP does not change, else if your IP changes every time you have to change it also.
<Directory /usr/share/phpMyAdmin/>
Order Deny,Allow
Deny from All
Allow from 127.0.0.1
Allow from ::1
Allow from 105.105.105.254 ## set here your IP address
...
</Directory>
Try this:
window.open(url, '_blank');
This will open in new tab (if your code is synchronous and in this case it is. in other case it would open a window)
List comprehension can shorten things...
win_percentages = [m**2.0 / (m**2.0 + n**2.0) * 100 for m, n in [a[i] for i in NL_East]]
Use following code
List data = getJdbcTemplate().queryForList(query,String.class)
There is a plugin for Android Studio called “Mock Location Plugin”. You can emulate multiple points with this plugin. You can find a detailed manual of use in this link: Android Studio. Simulate multiple GPS points with Mock Location Plugin
(originally posted by leepowers in his question)
The error message is confusing for one big reason:
Primitive type names are not reserved in PHP
The following are all valid class declarations:
class string { }
class int { }
class float { }
class double { }
My mistake was in thinking that the error message was referring solely to the string primitive type - the word 'instance' should have given me pause. An example to illustrate further:
class string { }
$n = 1234;
$s1 = (string)$n;
$s2 = new string();
$a = array('no', 'yes');
printf("\$s1 - primitive string? %s - string instance? %s\n",
$a[is_string($s1)], $a[is_a($s1, 'string')]);
printf("\$s2 - primitive string? %s - string instance? %s\n",
$a[is_string($s2)], $a[is_a($s2, 'string')]);
Output:
$s1 - primitive string? yes - string instance? no
$s2 - primitive string? no - string instance? yes
In PHP it's possible for a string
to be a string
except when it's actually a string
. As with any language that uses implicit type conversion, context is everything.
string saveStaff = "INSERT into student (stud_id,stud_name) " + " VALUES ('" + SI+ "', '" + SN + "');";
cmd = new SqlCommand(saveStaff,con);
cmd.ExecuteNonQuery();
How to find out what this MySQL Error is trying to say:
#1064 - You have an error in your SQL syntax;
This error has no clues in it. You have to double check all of these items to see where your mistake is:
!@#$%^&*()-_=+[]{}\|;:'",<>/?
select
, into
, or countless others. Take away as much as you can from the broken query until it starts working. And then use PostgreSQL next time that has a sane syntax reporting system.
In Windows 10 I had that problem because My C Drive was getting full and I had needed free Space, AVD folder had 14 gig space so I needed move that folder to another driver,first answer not work for Me so I tested another way to fix this problem, I make a picture for you if you have the same problem, you dont need to move all of files in .android folder to another drive (this way not work) just move avd folders in ....android\avd to another drive and open .ini files and change avd folder path from that file to new path. Like this image:
I Hope this works for you.
SELECT
SUM(sdmvPTNS.row_count) AS [DBRows]
FROM
sys.objects AS sOBJ
INNER JOIN sys.dm_db_partition_stats AS sdmvPTNS
ON sOBJ.object_id = sdmvPTNS.object_id
WHERE
sOBJ.type = 'U'
AND sOBJ.is_ms_shipped = 0
AND sdmvPTNS.index_id < 2
GO
This class-based javascript animation works in AngularJS 1.2 (and 1.4 tested)
Edit: I ended up abandoning this code and went a completely different direction. I like my other answer much better. This answer will give you some problems in certain situations.
myApp.animation('.ng-show-toggle-slidedown', function(){
return {
beforeAddClass : function(element, className, done){
if (className == 'ng-hide'){
$(element).slideUp({duration: 400}, done);
} else {done();}
},
beforeRemoveClass : function(element, className, done){
if (className == 'ng-hide'){
$(element).css({display:'none'});
$(element).slideDown({duration: 400}, done);
} else {done();}
}
}
});
Simply add the .ng-hide-toggle-slidedown
class to the container element, and the jQuery slide down behavior will be implemented based on the ng-hide class.
You must include the $(element).css({display:'none'})
line in the beforeRemoveClass
method because jQuery will not execute a slideDown unless the element is in a state of display: none
prior to starting the jQuery animation. AngularJS uses the CSS
.ng-hide:not(.ng-hide-animate) {
display: none !important;
}
to hide the element. jQuery is not aware of this state, and jQuery will need the display:none
prior to the first slide down animation.
The AngularJS animation will add the .ng-hide-animate
and .ng-animate
classes while the animation is occuring.
My recommendation is to checkout the code on a deployment machine, install dependencies as needed (this includes NOT installing dev dependencies if the code goes to production), and then move all the files to the target machine.
Why?
composer install
Long story short: Use Composer in an environment you can control. Your development machine does qualify because you already have all the things that are needed to operate Composer.
What's the correct way to deploy this without installing the -dev dependencies?
The command to use is
composer install --no-dev
This will work in any environment, be it the production server itself, or a deployment machine, or the development machine that is supposed to do a last check to find whether any dev requirement is incorrectly used for the real software.
The command will not install, or actively uninstall, the dev requirements declared in the composer.lock file.
If you don't mind deploying development software components on a production server, running composer install
would do the same job, but simply increase the amount of bytes moved around, and also create a bigger autoloader declaration.
If multiple clock are generated with different frequencies, then clock generation can be simplified if a procedure is called as concurrent procedure call. The time resolution issue, mentioned by Martin Thompson, may be mitigated a little by using different high and low time in the procedure. The test bench with procedure for clock generation is:
library ieee;
use ieee.std_logic_1164.all;
entity tb is
end entity;
architecture sim of tb is
-- Procedure for clock generation
procedure clk_gen(signal clk : out std_logic; constant FREQ : real) is
constant PERIOD : time := 1 sec / FREQ; -- Full period
constant HIGH_TIME : time := PERIOD / 2; -- High time
constant LOW_TIME : time := PERIOD - HIGH_TIME; -- Low time; always >= HIGH_TIME
begin
-- Check the arguments
assert (HIGH_TIME /= 0 fs) report "clk_plain: High time is zero; time resolution to large for frequency" severity FAILURE;
-- Generate a clock cycle
loop
clk <= '1';
wait for HIGH_TIME;
clk <= '0';
wait for LOW_TIME;
end loop;
end procedure;
-- Clock frequency and signal
signal clk_166 : std_logic;
signal clk_125 : std_logic;
begin
-- Clock generation with concurrent procedure call
clk_gen(clk_166, 166.667E6); -- 166.667 MHz clock
clk_gen(clk_125, 125.000E6); -- 125.000 MHz clock
-- Time resolution show
assert FALSE report "Time resolution: " & time'image(time'succ(0 fs)) severity NOTE;
end architecture;
The time resolution is printed on the terminal for information, using the concurrent assert last in the test bench.
If the clk_gen
procedure is placed in a separate package, then reuse from test bench to test bench becomes straight forward.
Waveform for clocks are shown in figure below.
An more advanced clock generator can also be created in the procedure, which can adjust the period over time to match the requested frequency despite the limitation by time resolution. This is shown here:
-- Advanced procedure for clock generation, with period adjust to match frequency over time, and run control by signal
procedure clk_gen(signal clk : out std_logic; constant FREQ : real; PHASE : time := 0 fs; signal run : std_logic) is
constant HIGH_TIME : time := 0.5 sec / FREQ; -- High time as fixed value
variable low_time_v : time; -- Low time calculated per cycle; always >= HIGH_TIME
variable cycles_v : real := 0.0; -- Number of cycles
variable freq_time_v : time := 0 fs; -- Time used for generation of cycles
begin
-- Check the arguments
assert (HIGH_TIME /= 0 fs) report "clk_gen: High time is zero; time resolution to large for frequency" severity FAILURE;
-- Initial phase shift
clk <= '0';
wait for PHASE;
-- Generate cycles
loop
-- Only high pulse if run is '1' or 'H'
if (run = '1') or (run = 'H') then
clk <= run;
end if;
wait for HIGH_TIME;
-- Low part of cycle
clk <= '0';
low_time_v := 1 sec * ((cycles_v + 1.0) / FREQ) - freq_time_v - HIGH_TIME; -- + 1.0 for cycle after current
wait for low_time_v;
-- Cycle counter and time passed update
cycles_v := cycles_v + 1.0;
freq_time_v := freq_time_v + HIGH_TIME + low_time_v;
end loop;
end procedure;
Again reuse through a package will be nice.
Simple Solution:
df['date_only'] = df['date_time_column'].dt.date
Considering none of these answers will account for the current year when the month changes, you can find one I made below which should handle it:
The method:
Date.prototype.addMonths = function (m) {
var d = new Date(this);
var years = Math.floor(m / 12);
var months = m - (years * 12);
if (years) d.setFullYear(d.getFullYear() + years);
if (months) d.setMonth(d.getMonth() + months);
return d;
}
Usage:
return new Date().addMonths(2);
You should assume it does something useful and call Dispose even if it does nothing in current .NET Framework incarnations. There's no guarantee it will stay that way in future versions leading to inefficient resource usage.
For MySQL Workbench
There are a lot of awkward and unnecessarily complicated answers on this page. The highest rated one, @amateur's, is quite good, although it has a bit of unnecessary fluff in the RegExp. Here is a slightly more optimal solution with cleaner RegExp and a cleaner replace
call:
function updateQueryStringParamsNoHash(uri, key, value) {
var re = new RegExp("([?&])" + key + "=[^&]*", "i");
return re.test(uri)
? uri.replace(re, '$1' + key + "=" + value)
: uri + separator + key + "=" + value
;
}
As an added bonus, if uri
is not a string, you won't get errors for trying to call match
or replace
on something that may not implement those methods.
And if you want to handle the case of a hash (and you've already done a check for properly formatted HTML), you can leverage the existing function instead of writing a new function containing the same logic:
function updateQueryStringParams(url, key, value) {
var splitURL = url.split('#');
var hash = splitURL[1];
var uri = updateQueryStringParamsNoHash(splitURL[0]);
return hash == null ? uri : uri + '#' + hash;
}
Or you can make some slight changes to @Adam's otherwise excellent answer:
function updateQueryStringParameter(uri, key, value) {
var re = new RegExp("([?&])" + key + "=[^&#]*", "i");
if (re.test(uri)) {
return uri.replace(re, '$1' + key + "=" + value);
} else {
var matchData = uri.match(/^([^#]*)(#.*)?$/);
var separator = /\?/.test(uri) ? "&" : "?";
return matchData[0] + separator + key + "=" + value + (matchData[1] || '');
}
}
For large dataframes of numeric data, you may see a significant performance improvement via numpy.lexsort
, which performs an indirect sort using a sequence of keys:
import pandas as pd
import numpy as np
np.random.seed(0)
df1 = pd.DataFrame(np.random.randint(1, 5, (10,2)), columns=['a','b'])
df1 = pd.concat([df1]*100000)
def pdsort(df1):
return df1.sort_values(['a', 'b'], ascending=[True, False])
def lex(df1):
arr = df1.values
return pd.DataFrame(arr[np.lexsort((-arr[:, 1], arr[:, 0]))])
assert (pdsort(df1).values == lex(df1).values).all()
%timeit pdsort(df1) # 193 ms per loop
%timeit lex(df1) # 143 ms per loop
One peculiarity is that the defined sorting order with numpy.lexsort
is reversed: (-'b', 'a')
sorts by series a
first. We negate series b
to reflect we want this series in descending order.
Be aware that np.lexsort
only sorts with numeric values, while pd.DataFrame.sort_values
works with either string or numeric values. Using np.lexsort
with strings will give: TypeError: bad operand type for unary -: 'str'
.
You can use input type="reset"
<form action="/action_page.php">
text: <input type="text" name="email" /><br />
<input type="reset" defaultValue="Reset" />
</form>
Simply:
UIView
as wrapper with auto layout to views around. UILabel
inside that wrapper. Add constraints that will stick tyour label to edges of wrapper.UIButton
inside your wrapper, then simple add the same constraints as you did for UILabel
.I found complete working example for SFTP in java using JSCH API http://kodehelp.com/java-program-for-uploading-file-to-sftp-server/
I just wrote something to handle something along the authors intention. I found the best thing to do was to let the constructor take all the objects and then in your implemented method use that constructor objects.
However, if you are writing a generic interface class, then you have to pass an Object, or better a list of Objects. This could be done by Object[] or even better, Object ... because it is easier to call.
See my example piece just below.
List<String> lst = new ArrayList<String>();
lst.add("1");
lst.add("2");
SomeAbstractClass p = new SomeAbstractClass (lst, "another parameter", 20, true) {
public void perform( ) {
ArrayList<String> lst = (ArrayList<String>)getArgs()[0];
}
};
public abstract class SomeAbstractClass{
private Object[] args;
public SomeAbstractClass(Object ... args) {
this.args = args;
}
public abstract void perform();
public Object[] getArgs() {
return args;
}
}
Please see this post about Java closures that supports this out of the box: http://mseifed.blogspot.se/2012/09/closure-implementation-for-java-5-6-and.html
Version 1 supports passing of non-final closures with autocasting:
https://github.com/MSeifeddo/Closure-implementation-for-Java-5-6-and-7/blob/master/org/mo/closure/v1/Closure.java
SortedSet<String> sortedNames = new TreeSet<String>();
// NOTE! Instead of enforcing final, we pass it through the constructor
eachLine(randomFile0, new V1<String>(sortedNames) {
public void call(String line) {
SortedSet<String> sortedNames = castFirst(); // Read contructor arg zero, and auto cast it
sortedNames.add(extractName(line));
}
});
An even easier method is to use the TextMode
attribute:
<asp:TextBox runat="server" ID="txtTextBox" TextMode="Number">
time.monotonic() (basically your computer's uptime in seconds) is guarranteed to not misbehave when your computer's clock is adjusted (such as when transitioning to/from daylight saving time).
>>> import time
>>>
>>> time.monotonic()
452782.067158593
>>>
>>> a = time.monotonic()
>>> time.sleep(1)
>>> b = time.monotonic()
>>> print(b-a)
1.001658110995777
You can use ng-change instead of ng-click:
<!doctype html>
<html>
<head>
<script src="http://code.angularjs.org/1.2.3/angular.min.js"></script>
<script>
var app = angular.module('myapp', []);
app.controller('mainController', function($scope) {
$scope.vm = {};
$scope.vm.myClick = function($event) {
alert($event);
}
});
</script>
</head>
<body ng-app="myapp">
<div ng-controller="mainController">
<input type="checkbox" ng-model="vm.myChkModel" ng-change="vm.myClick(vm.myChkModel)">
</div>
</body>
</html>
To get the port number in your code you can use the following:
@Autowired
Environment environment;
@GetMapping("/test")
String testConnection(){
return "Your server is up and running at port: "+environment.getProperty("local.server.port");
}
To understand the Environment property you can go through this Spring boot Environment
One possible solution is to add a class to every option
<select name="export_type" id="export_type">
<option class="export_option" value="pdf">PDF</option>
<option class="export_option" value="xlsx">Excel</option>
<option class="export_option" value="docx">DocX</option>
</select>
and then use the click handler for this class
$(document).ready(function () {
$(".export_option").click(function (e) {
//alert('click');
});
});
UPDATE: it looks like the code works in FF, IE and Opera but not in Chrome. Looking at the specs http://www.w3.org/TR/html401/interact/forms.html#h-17.6 I would say it's a bug in Chrome.
For this answer, I refer to querySelector
and querySelectorAll
as querySelector* and to getElementById
, getElementsByClassName
, getElementsByTagName
, and getElementsByName
as getElement*.
querySelector
and getElementById
both return a single element. querySelectorAll
and getElementsByName
both return NodeLists, being newer functions that were added after HTMLCollection went out of fashion. The older getElementsByClassName
and getElementsByTagName
both return HTMLCollections. Again, this is essentially irrelevant to whether the elements are live or static.These concepts are summarized in the following table.
Function | Live? | Type | Time Complexity
querySelector | N | Element | O(n)
querySelectorAll | N | NodeList | O(n)
getElementById | Y | Element | O(1)
getElementsByClassName | Y | HTMLCollection | O(1)
getElementsByTagName | Y | HTMLCollection | O(1)
getElementsByName | Y | NodeList | O(1)
HTMLCollections are not as array-like as NodeLists and do not support .forEach(). I find the spread operator useful to work around this:
[...document.getElementsByClassName("someClass")].forEach()
Every element, and the global document
, have access to all of these functions except for getElementById
and getElementsByName
, which are only implemented on document
.
Chaining getElement* calls instead of using querySelector* will improve performance, especially on very large DOMs. Even on small DOMs and/or with very long chains, it is generally faster. However, unless you know you need the performance, the readability of querySelector* should be preferred. querySelectorAll
is often harder to rewrite, because you must select elements from the NodeList or HTMLCollection at every step. For example, the following code does not work:
document.getElementsByClassName("someClass").getElementsByTagName("div")
because you can only use getElements* on single elements, not collections. For example:
document.querySelector("#someId .someClass div")
could be written as:
document.getElementById("someId").getElementsByClassName("someClass")[0].getElementsByTagName("div")[0]
Note the use of [0]
to get just the first element of the collection at each step that returns a collection, resulting in one element at the end just like with querySelector
.
Since all elements have access to both querySelector* and getElement* calls, you can make chains using both calls, which can be useful if you want some performance gain, but cannot avoid a querySelector that can not be written in terms of the getElement* calls.
Though it is generally easy to tell if a selector can be written using only getElement* calls, there is one case that may not be obvious:
document.querySelectorAll(".class1.class2")
can be rewritten as
document.getElementsByClassName("class1 class2")
Using getElement* on a static element fetched with querySelector* will result in an element that is live with respect to the static subset of the DOM copied by querySelector, but not live with respect to the full document DOM... this is where the simple live/static interpretation of elements begins to fall apart. You should probably avoid situations where you have to worry about this, but if you do, remember that querySelector* calls copy elements they find before returning references to them, but getElement* calls fetch direct references without copying.
Neither API specifies which element should be selected first if there are multiple matches.
Because querySelector* iterates through the DOM until it finds a match (see Main Difference #2), the above also implies that you cannot rely on the position of an element you are looking for in the DOM to guarantee that it is found quickly - the browser may iterate through the DOM backwards, forwards, depth first, breadth first, or otherwise. getElement* will still find elements in roughly the same amount of time regardless of their placement.
Your OCD is to blame :)
You do not have to put anything about copyright on your page - copyright automatically applies until you explicitly license it otherwise. Copyright also applies for a preset number of years as determined by international treaties. I do not know what the exact number of years is, but it is a lot, so there is absolutely no point in updating the year in your copyright notice.
i suggest to give a width to all the grid's columns like this :
DataGridViewTextBoxColumn col = new DataGridViewTextBoxColumn();
col.HeaderText = "phone"
col.Width = 120;
col.DataPropertyName = (if you use a datasource)
thegrid.Columns.Add(col);
and for the main(or the longest) column(let's say address) do this :
col = new DataGridViewTextBoxColumn();
col.HeaderText = "address";
col.Width = 120;
tricky part
col.MinimumWidth = 120;
col.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
tricky part
col.DataPropertyName = (same as above)
thegrid.Columns.Add(col);
In this way, if you stretch the form (and the grid is "dock filled" in his container) the main column, in this case the address column, takes all the space available, but it never goes less than col.MinimumWidth, so it's the only one that is resized.
I use it, when i have a grid and its last column is used for display an image (like icon detail or icon delete..) and it doesn't have the header and it has to be always the smallest one.
There is a similar problem.it is a tomcat digital signature.
$ gpg --verify apache-tomcat-9.0.16-windows-x64.zip.asc apache-tomcat-9.0.16-windows-
x64.zip
gpg: Signature made 2019?02? 5? 0:32:50
gpg: using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: Can't check signature: No public key
but then I use the RSA key it provided to receive the public key to verify.
$ gpg --receive-keys A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: key 10C01C5A2F6059E7: 38 signatures not checked due to missing keys
gpg: key 10C01C5A2F6059E7: public key "Mark E D Thomas <[email protected]>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg: imported: 1
Then successfully.
$ gpg --verify apache-tomcat-9.0.16-windows-x64.zip.asc
gpg: assuming signed data in 'apache-tomcat-9.0.16-windows-x64.zip'
gpg: Signature made 2019?02? 5? 0:32:50
gpg: using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7
gpg: Good signature from "Mark E D Thomas <[email protected]>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: A9C5 DF4D 22E9 9998 D987 5A51 10C0 1C5A 2F60 59E7
Python indexing starts at 0 (rather than 1), so your assignment "r[1,:] = r0" defines the second (i.e. index 1) element of r and leaves the first (index 0) element as a pair of zeros. The first value of i in your for loop is 0, so rr gets the square root of the dot product of the first entry in r with itself (which is 0), and the division by rr in the subsequent line throws the error.
C:\Program Files\Git\bin
and C:\Program Files\Git\mingw64\bin
Then try something like: git clone https://github.com/heroku/node-js-getting-started.git
It is Nanny. I feel .Net got this one right - it raises a warning for unreachable code, but not an error. It is good to be warned about it, but I see no reason to prevent compilation (especially during debugging sessions where it is nice to throw a return in to bypass some code).
The problem is that bootstrap removes the backdrop asynchronously. So when you call hide
and show
quickly after each other, the backdrop isn't removed.
The solution (as you've mentioned) is to wait for the modal to have been hidden completely, using the 'hidden.bs.modal'
event. Use jQuery one to only perform the callback once. I've forked your jsfiddle to show how this would work.
// wait for the backdrop to be removed nicely.
loadingModal.one('hidden.bs.modal', function()
{
loadingModal.modal("show");
//Again simulate 3 seconds
setTimeout(function () {
loadingModal.modal("hide");
}, 3000);
});
// hide for the first time, after binding to the hidden event.
loadingModal.modal("hide");
Looking through the code in Bootstrap:
This is what makes hiding the modal asynchronous:
$.support.transition && this.$element.hasClass('fade') ?
this.$element
.one('bsTransitionEnd', $.proxy(this.hideModal, this))
.emulateTransitionEnd(Modal.TRANSITION_DURATION) :
this.hideModal()
This checks whether transitions are supported and the fade
class is included on the modal. When both are true
, it waits for the fade effect to complete, before hiding the modal. This waiting happens again before removing the backdrop.
This is why removing the fade class will make hiding the modal synchronous (no more waiting for CSS fade effect to complete) and why the solution by reznic works.
This check determines whether to add or remove the backdrop. isShown = true
is performed synchronously. When you call hide
and show
quickly after each other, isShown
becomes true
and the check adds a backdrop, instead of removing the previous one, creating the problem you're having.
What does copying an object mean? There are a few ways you can copy objects--let's talk about the 2 kinds you're most likely referring to--deep copy and shallow copy.
Since we're in an object-oriented language (or at least are assuming so), let's say you have a piece of memory allocated. Since it's an OO-language, we can easily refer to chunks of memory we allocate because they are usually primitive variables (ints, chars, bytes) or classes we defined that are made of our own types and primitives. So let's say we have a class of Car as follows:
class Car //A very simple class just to demonstrate what these definitions mean.
//It's pseudocode C++/Javaish, I assume strings do not need to be allocated.
{
private String sPrintColor;
private String sModel;
private String sMake;
public changePaint(String newColor)
{
this.sPrintColor = newColor;
}
public Car(String model, String make, String color) //Constructor
{
this.sPrintColor = color;
this.sModel = model;
this.sMake = make;
}
public ~Car() //Destructor
{
//Because we did not create any custom types, we aren't adding more code.
//Anytime your object goes out of scope / program collects garbage / etc. this guy gets called + all other related destructors.
//Since we did not use anything but strings, we have nothing additional to handle.
//The assumption is being made that the 3 strings will be handled by string's destructor and that it is being called automatically--if this were not the case you would need to do it here.
}
public Car(const Car &other) // Copy Constructor
{
this.sPrintColor = other.sPrintColor;
this.sModel = other.sModel;
this.sMake = other.sMake;
}
public Car &operator =(const Car &other) // Assignment Operator
{
if(this != &other)
{
this.sPrintColor = other.sPrintColor;
this.sModel = other.sModel;
this.sMake = other.sMake;
}
return *this;
}
}
A deep copy is if we declare an object and then create a completely separate copy of the object...we end up with 2 objects in 2 completely sets of memory.
Car car1 = new Car("mustang", "ford", "red");
Car car2 = car1; //Call the copy constructor
car2.changePaint("green");
//car2 is now green but car1 is still red.
Now let's do something strange. Let's say car2 is either programmed wrong or purposely meant to share the actual memory that car1 is made of. (It's usually a mistake to do this and in classes is usually the blanket it's discussed under.) Pretend that anytime you ask about car2, you're really resolving a pointer to car1's memory space...that's more or less what a shallow copy is.
//Shallow copy example
//Assume we're in C++ because it's standard behavior is to shallow copy objects if you do not have a constructor written for an operation.
//Now let's assume I do not have any code for the assignment or copy operations like I do above...with those now gone, C++ will use the default.
Car car1 = new Car("ford", "mustang", "red");
Car car2 = car1;
car2.changePaint("green");//car1 is also now green
delete car2;/*I get rid of my car which is also really your car...I told C++ to resolve
the address of where car2 exists and delete the memory...which is also
the memory associated with your car.*/
car1.changePaint("red");/*program will likely crash because this area is
no longer allocated to the program.*/
So regardless of what language you're writing in, be very careful about what you mean when it comes to copying objects because most of the time you want a deep copy.
What are the copy constructor and the copy assignment operator?
I have already used them above. The copy constructor is called when you type code such as Car car2 = car1;
Essentially if you declare a variable and assign it in one line, that's when the copy constructor is called. The assignment operator is what happens when you use an equal sign--car2 = car1;
. Notice car2
isn't declared in the same statement. The two chunks of code you write for these operations are likely very similar. In fact the typical design pattern has another function you call to set everything once you're satisfied the initial copy/assignment is legitimate--if you look at the longhand code I wrote, the functions are nearly identical.
When do I need to declare them myself? If you are not writing code that is to be shared or for production in some manner, you really only need to declare them when you need them. You do need to be aware of what your program language does if you choose to use it 'by accident' and didn't make one--i.e. you get the compiler default. I rarely use copy constructors for instance, but assignment operator overrides are very common. Did you know you can override what addition, subtraction, etc. mean as well?
How can I prevent my objects from being copied? Override all of the ways you're allowed to allocate memory for your object with a private function is a reasonable start. If you really don't want people copying them, you could make it public and alert the programmer by throwing an exception and also not copying the object.
You can do it by walking the stack backwards. In reality, though, it's frequently easier to add an identifier onto a call stack at the beginning of each function and pop it at the end, then just walk that printing the contents. It's a bit of a PITA, but it works well and will save you time in the end.
editText.setInputType(InputType.TYPE_NULL);
Use @ViewChildren
from @angular/core
to get a reference to the components
template
<div *ngFor="let v of views">
<customcomponent #cmp></customcomponent>
</div>
component
import { ViewChildren, QueryList } from '@angular/core';
/** Get handle on cmp tags in the template */
@ViewChildren('cmp') components:QueryList<CustomComponent>;
ngAfterViewInit(){
// print array of CustomComponent objects
console.log(this.components.toArray());
}
To hide the element visually, but keep it in the html, you can use:
<div style='visibility:hidden; overflow:hidden; height:0; width:0;'>
[content]
</div>
or
<div style='visibility:hidden; overflow:hidden; position:absolute;'>
[content]
</div>
What may go wrong with display:none
? It removes the element completely from the html, so some functionalities may be broken if they need to access something in the hidden element.
For currency, I'd suggest:
<div><label>Amount $
<input type="number" placeholder="0.00" required name="price" min="0" value="0" step="0.01" title="Currency" pattern="^\d+(?:\.\d{1,2})?$" onblur="
this.parentNode.parentNode.style.backgroundColor=/^\d+(?:\.\d{1,2})?$/.test(this.value)?'inherit':'red'
"></label></div>
See http://jsfiddle.net/vx3axsk5/1/
The HTML5 properties "step", "min" and "pattern" will be validated when the form is submit, not onblur. You don't need the step
if you have a pattern
and you don't need a pattern
if you have a step
. So you could revert back to step="any"
with my code since the pattern will validate it anyways.
If you'd like to validate onblur, I believe giving the user a visual cue is also helpful like coloring the background red. If the user's browser doesn't support type="number"
it will fallback to type="text"
. If the user's browser doesn't support the HTML5 pattern validation, my JavaScript snippet doesn't prevent the form from submitting, but it gives a visual cue. So for people with poor HTML5 support, and people trying to hack into the database with JavaScript disabled or forging HTTP Requests, you need to validate on the server again anyways. The point with validation on the front-end is for a better user experience. So as long as most of your users have a good experience, it's fine to rely on HTML5 features provided the code will still works and you can validate on the back-end.
==
and ===
The difference between the loosely ==
equal operator and the strict ===
identical operator is exactly explained in the manual:
Comparison Operators
+----------------------------------------------------------------------------------+ ¦ Example ¦ Name ¦ Result ¦ +----------+-----------+-----------------------------------------------------------¦ ¦$a == $b ¦ Equal ¦ TRUE if $a is equal to $b after type juggling. ¦ ¦$a === $b ¦ Identical ¦ TRUE if $a is equal to $b, and they are of the same type. ¦ +----------------------------------------------------------------------------------+
==
equal comparisonIf you are using the ==
operator, or any other comparison operator which uses loosely comparison such as !=
, <>
or ==
, you always have to look at the context to see what, where and why something gets converted to understand what is going on.
As reference and example you can see the comparison table in the manual:
Loose comparisons with
==
+-----------------------------------------------------------------------------------------------------------+ ¦ ¦ TRUE ¦ FALSE ¦ 1 ¦ 0 ¦ -1 ¦ "1" ¦ "0" ¦ "-1" ¦ NULL ¦ array() ¦ "php" ¦ "" ¦ +---------+-------+-------+-------+-------+-------+-------+-------+-------+-------+---------+-------+-------¦ ¦ TRUE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ TRUE ¦ FALSE ¦ TRUE ¦ ¦ 1 ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ 0 ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ TRUE ¦ ¦ -1 ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "1" ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "0" ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "-1" ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ NULL ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ TRUE ¦ FALSE ¦ TRUE ¦ ¦ array() ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ TRUE ¦ FALSE ¦ FALSE ¦ ¦ "php" ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ ¦ "" ¦ FALSE ¦ TRUE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ TRUE ¦ +-----------------------------------------------------------------------------------------------------------+
===
identical comparisonIf you are using the ===
operator, or any other comparison operator which uses strict comparison such as !==
or ===
, then you can always be sure that the types won't magically change, because there will be no converting going on. So with strict comparison the type and value have to be the same, not only the value.
As reference and example you can see the comparison table in the manual:
Strict comparisons with
===
+-----------------------------------------------------------------------------------------------------------+ ¦ ¦ TRUE ¦ FALSE ¦ 1 ¦ 0 ¦ -1 ¦ "1" ¦ "0" ¦ "-1" ¦ NULL ¦ array() ¦ "php" ¦ "" ¦ +---------+-------+-------+-------+-------+-------+-------+-------+-------+-------+---------+-------+-------¦ ¦ TRUE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ 1 ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ 0 ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ -1 ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "1" ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "0" ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ "-1" ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ NULL ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ FALSE ¦ ¦ array() ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ FALSE ¦ ¦ "php" ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ FALSE ¦ ¦ "" ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ FALSE ¦ TRUE ¦ +-----------------------------------------------------------------------------------------------------------+
document.getElementsByClassName
returns a node list. So you'll have to iterate over the list and bind the event to individual elements. Like this...
var buttons = document.getElementsByClassName("navButton");
for(var i = 0; i < buttons.length; ++i){
buttons[i].onmouseover = function() {
this.setAttribute("class", "active");
this.setAttribute("src", "images/arrows/top_o.png");
}
}
Open a command prompt as an Administrator.
Enter slmgr /upk
and wait for this to complete. This will uninstall the current product key from Windows and put it into an unlicensed state.
Enter slmgr /cpky
and wait for this to complete. This will remove the product key from the registry if it's still there.
Enter slmgr /rearm
and wait for this to complete. This is to reset the Windows activation timers so the new users will be prompted to activate Windows when they put in the key.
This should put the system back to a pre-key state.
Hope this helps you out!
All the answers here use the jQuery library.
But the vanilla javascript is very straightforward.
If you want to run a script only if the element with an id
of #dataTable
also has a data-timer
attribute, then the steps are as follows:
// Locate the element
const myElement = document.getElementById('dataTable');
// Run conditional code
if (myElement.dataset.hasOwnProperty('timer')) {
[... CODE HERE...]
}
Number((6.688689).toFixed(1)); // 6.7
var number = 6.688689;
var roundedNumber = Math.round(number * 10) / 10;
Use toFixed()
function.
(6.688689).toFixed(); // equal to "7"
(6.688689).toFixed(1); // equal to "6.7"
(6.688689).toFixed(2); // equal to "6.69"
the below function will check the column if exist return appropriate message else it will add the column to the table.
create or replace function addcol(schemaname varchar, tablename varchar, colname varchar, coltype varchar)
returns varchar
language 'plpgsql'
as
$$
declare
col_name varchar ;
begin
execute 'select column_name from information_schema.columns where table_schema = ' ||
quote_literal(schemaname)||' and table_name='|| quote_literal(tablename) || ' and column_name= '|| quote_literal(colname)
into col_name ;
raise info ' the val : % ', col_name;
if(col_name is null ) then
col_name := colname;
execute 'alter table ' ||schemaname|| '.'|| tablename || ' add column '|| colname || ' ' || coltype;
else
col_name := colname ||' Already exist';
end if;
return col_name;
end;
$$
Here is what you are looking for:
Service hangs up at WaitForExit after calling batch file
It's about a question as to why a service can't execute a file, but it shows all the code necessary to do so.
I recently ran into this exact problem and tried most of the suggestions but it turns out my problem was something different.
Our application has a section that redirects you to HTTPS if you are on HTTP (yes, I know there are better ways but this is legacy). In addition, there is special handling of localhost when you are in dev mode which redirected you back to HTTP, though I don't know why.
I have a new requirement that requires testing in HTTPS.
On a normal web page, changing http:// to https:// and calling Redirect would work fine but in IISExpress you are using custom ports. So for example, if you are on https://localhost:44300 you can't just switch to http://localhost:44300 b/c that port only serves https, not http.
So, if you are having this problem and you've cleared the config files and it didn't help, check your code for redirects. you might have something using a hardcoded or partially hardcoded url or a url from a config file that you haven't updated to https.
Update: I also suggest clearing all .suo and .user files and someone else suggested clearing the obj/ folder. I suggest doing this with VS closed and then restarting. I had a lot of trouble with values for ports being cached when i tried to setup https:// and change ports. I also suggest trying this suggestion to check that the SSL port is within the correct range, though I don't know if that is still a requirement https://stackoverflow.com/a/24957146
$ postgres -V # Or --version. Use "locate bin/postgres" if not found.
postgres (PostgreSQL) 9.6.1
$ postgres -V | awk '{print $NF}' # Last column is version.
9.6.1
$ postgres -V | egrep -o '[0-9]{1,}\.[0-9]{1,}' # Major.Minor version
9.6
If having more than one installation of PostgreSQL, or if getting the "postgres: command not found
" error:
$ locate bin/postgres | xargs -i xargs -t '{}' -V # xargs is intentionally twice.
/usr/pgsql-9.3/bin/postgres -V
postgres (PostgreSQL) 9.3.5
/usr/pgsql-9.6/bin/postgres -V
postgres (PostgreSQL) 9.6.1
If locate
doesn't help, try find
:
$ sudo find / -wholename '*/bin/postgres' 2>&- | xargs -i xargs -t '{}' -V # xargs is intentionally twice.
/usr/pgsql-9.6/bin/postgres -V
postgres (PostgreSQL) 9.6.1
Although postmaster
can also be used instead of postgres
, using postgres
is preferable because postmaster
is a deprecated alias of postgres
.
As relevant, login as postgres
.
$ psql -V # Or --version
psql (PostgreSQL) 9.6.1
If having more than one installation of PostgreSQL:
$ locate bin/psql | xargs -i xargs -t '{}' -V # xargs is intentionally twice.
/usr/bin/psql -V
psql (PostgreSQL) 9.3.5
/usr/pgsql-9.2/bin/psql -V
psql (PostgreSQL) 9.2.9
/usr/pgsql-9.3/bin/psql -V
psql (PostgreSQL) 9.3.5
=> SELECT version();
version
--------------------------------------------------------------------------------------------------------------
PostgreSQL 9.2.9 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4), 64-bit
=> SHOW server_version;
server_version
----------------
9.2.9
=> SHOW server_version_num;
server_version_num
--------------------
90209
If more curious, try => SHOW all;
.
For what it's worth, a shell command can be executed within psql
to show the client version of the psql
executable in the path. Note that the running psql
can potentially be different from the one in the path.
=> \! psql -V
psql (PostgreSQL) 9.2.9
Sometimes this occurs when you have the folder of the package you are trying to restore inside the "packages" folder (i.e. "Packages/EntityFramework.6.0.0/") but the "DLLs" are not inside it (most of the version control systems automatically ignore ".dll" files). This occurs because before NuGet tries to restore each package it checks if the folders already exist, so if it exists, NuGet assumes that the "dll" is inside it. So if this is the problem for you just delete the folder that NuGet will restore it correctly.
System call fork() is used to create processes. It takes no arguments and returns a process ID. The purpose of fork() is to create a new process, which becomes the child process of the caller. After a new child process is created, both processes will execute the next instruction following the fork() system call. Therefore, we have to distinguish the parent from the child. This can be done by testing the returned value of fork()
Fork is a system call and you shouldnt think of it as a normal C function. When a fork() occurs you effectively create two new processes with their own address space.Variable that are initialized before the fork() call store the same values in both the address space. However values modified within the address space of either of the process remain unaffected in other process one of which is parent and the other is child. So if,
pid=fork();
If in the subsequent blocks of code you check the value of pid.Both processes run for the entire length of your code. So how do we distinguish them. Again Fork is a system call and here is difference.Inside the newly created child process pid will store 0 while in the parent process it would store a positive value.A negative value inside pid indicates a fork error.
When we test the value of pid to find whether it is equal to zero or greater than it we are effectively finding out whether we are in the child process or the parent process.
I needed an array to became a String rappresentation of an array I mean I needed that
var a = ['a','b','c'];
//became a "real" array string-like to pass on query params so was easy to do:
JSON.stringify(a); //-->"['a','b','c']"
maybe someone need it :)
Use try_files and named location block ('@apachesite'). This will remove unnecessary regex match and if block. More efficient.
location / {
root /path/to/root/of/static/files;
try_files $uri $uri/ @apachesite;
expires max;
access_log off;
}
location @apachesite {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://127.0.0.1:8080;
}
Update: The assumption of this config is that there doesn't exist any php script under /path/to/root/of/static/files
. This is common in most modern php frameworks. In case your legacy php projects have both php scripts and static files mixed in the same folder, you may have to whitelist all of the file types you want nginx to serve.
I just wanted to add that
if(variableThing){
// do something
}
is the same as
if(!!variableThing){
// do something
}
But this can be an issue when something is undefined.
// a === undefined, b is an empty object (eg. b.asdf === undefined)
var a, b = {};
// Both of these give error a.foo is not defined etc.
// you'd see the same behavior for !!a.foo and !!b.foo.bar
a.foo
b.foo.bar
// This works -- these return undefined
a && a.foo
b.foo && b.foo.bar
b && b.foo && b.foo.bar
The trick here is the chain of &&
s will return the first falsey value it finds -- and this can be fed to an if statement etc. So if b.foo is undefined, it will return undefined and skip the b.foo.bar
statement, and we get no error.
The above return undefined but if you have an empty string, false, null, 0, undefined those values will return and soon as we encounter them in the chain -- []
and {}
are both "truthy" and we will continue down the so-called "&& chain" to the next value to the right.
P.S. Another way of doing the same thing is (b || {}).foo
, because if b is undefined then b || {}
will be {}
, and you'll be accessing a value in an empty object (no error) instead of trying to access a value within "undefined" (causes an error). So, (b || {}).foo
is the same as b && b.foo
and ((b || {}).foo || {}).bar
is the same as b && b.foo && b.foo.bar
.
Split the screen and run command term ++curwin
to run the terminal inside the Vim buffer. Following command does both and worked for me:
:bo 10sp | term ++curwin
Console.WriteLine(Path.GetDirectoryName(@"C:\hello\my\dear\world.hm"));
Assuming you are on 10g, you can also use the MERGE statement. This allows you to insert the row if it doesn't exist and ignore the row if it does exist. People tend to think of MERGE when they want to do an "upsert" (INSERT if the row doesn't exist and UPDATE if the row does exist) but the UPDATE part is optional now so it can also be used here.
SQL> create table foo (
2 name varchar2(10) primary key,
3 age number
4 );
Table created.
SQL> ed
Wrote file afiedt.buf
1 merge into foo a
2 using (select 'johnny' name, null age from dual) b
3 on (a.name = b.name)
4 when not matched then
5 insert( name, age)
6* values( b.name, b.age)
SQL> /
1 row merged.
SQL> /
0 rows merged.
SQL> select * from foo;
NAME AGE
---------- ----------
johnny
I wrote about it on my blog a long time ago, WPF's support for common file dialogs is really bad (or at least is was in 3.5 I didn't check in version 4) - but it's easy to work around it.
You need to add the correct manifest to your application - that will give you a modern style message boxes and folder browser (WinForms FolderBrowserDialog) but not WPF file open/save dialogs, this is described in those 3 posts (if you don't care about the explanation and only want the solution go directly to the 3rd):
Fortunately, the open/save dialogs are very thin wrappers around the Win32 API that is easy to call with the right flags to get the Vista/7 style (after setting the manifest)
Ok...so first you need to import the image into your project.
1) Select the PictureBox in the Form Design View
2) Open PictureBox Tasks
(it's the little arrow printed to right on the edge of the PictureBox)
3) Click on "Choose image..."
4) Select the second option "Project resource file:"
(this option will create a folder called "Resources" which you can access with Properties.Resources)
5) Click on "Import..." and select your image from your computer
(now a copy of the image will be saved in "Resources" folder created at step 4)
6) Click on "OK"
Now the image is in your project and you can use it with the Properties command. Just type this code when you want to change the picture in the PictureBox:
pictureBox1.Image = Properties.Resources.MyImage;
Note:
MyImage represent the name of the image...
After typing "Properties.Resources.", all imported image files are displayed...
You can use CTE:
WITH DistinctMonitoringJob AS (
SELECT DISTINCT Category Distinct_Category FROM MonitoringJob
)
SELECT Distinct_Category
FROM DistinctMonitoringJob
ORDER BY Distinct_Category DESC
Good answers so far, I want to only add that you could check the type of a node using nodeType
:
yourElement.nodeType
This will give you an integer: (taken from here)
| Value | Constant | Description | |
|-------|----------------------------------|---------------------------------------------------------------|--|
| 1 | Node.ELEMENT_NODE | An Element node such as <p> or <div>. | |
| 2 | Node.ATTRIBUTE_NODE | An Attribute of an Element. The element attributes | |
| | | are no longer implementing the Node interface in | |
| | | DOM4 specification. | |
| 3 | Node.TEXT_NODE | The actual Text of Element or Attr. | |
| 4 | Node.CDATA_SECTION_NODE | A CDATASection. | |
| 5 | Node.ENTITY_REFERENCE_NODE | An XML Entity Reference node. Removed in DOM4 specification. | |
| 6 | Node.ENTITY_NODE | An XML <!ENTITY ...> node. Removed in DOM4 specification. | |
| 7 | Node.PROCESSING_INSTRUCTION_NODE | A ProcessingInstruction of an XML document | |
| | | such as <?xml-stylesheet ... ?> declaration. | |
| 8 | Node.COMMENT_NODE | A Comment node. | |
| 9 | Node.DOCUMENT_NODE | A Document node. | |
| 10 | Node.DOCUMENT_TYPE_NODE | A DocumentType node e.g. <!DOCTYPE html> for HTML5 documents. | |
| 11 | Node.DOCUMENT_FRAGMENT_NODE | A DocumentFragment node. | |
| 12 | Node.NOTATION_NODE | An XML <!NOTATION ...> node. Removed in DOM4 specification. | |
Note that according to Mozilla:
The following constants have been deprecated and should not be used anymore: Node.ATTRIBUTE_NODE, Node.ENTITY_REFERENCE_NODE, Node.ENTITY_NODE, Node.NOTATION_NODE
I had the similar problem: EOF -warning and only part of data was loading with read.csv(). I tried the quotes="", but it only removed the EOF -warning.
But looking at the first row that was not loading, I found that there was a special character, an arrow ? (hexadecimal value 0x1A) in one of the cells. After deleting the arrow I got the data to load normally.
Run commands below, in this order:
brew update
brew doctor
brew upgrade node
Now you have installed updated version of node, and it's probably not linked. If it's not, then just type: brew link node
or brew link --overwrite node
GNU Trove support this but not using generics. http://trove4j.sourceforge.net/javadocs/gnu/trove/TObjectIntHashMap.html
Ok, finally found the solution.
Probably due to lack of experience with ReactJS and web development...
var Task = React.createClass({
render: function() {
var percentage = this.props.children + '%';
....
<div className="ui-progressbar-value ui-widget-header ui-corner-left" style={{width : percentage}}/>
...
I created the percentage variable outside in the render function.
editTransactionRow.pay_id is Null so in fact you are doing: null.ToString() and it cannot be executed. You need to check editTransactionRow.pay_id and not editTransactionRow.pay_id.ToString();
You code should be (IF pay_id is a string):
If String.IsNullOrEmpty(editTransactionRow.pay_id) = False Then
stTransactionPaymentID = editTransactionRow.pay_id 'Check for null value
End If
If pay_id is an Integer than you can just check if it's null normally without String... Edit to show you if it's not a String:
If editTransactionRow.pay_id IsNot Nothing Then
stTransactionPaymentID = editTransactionRow.pay_id 'Check for null value
End If
If it's from a database you can use IsDBNull but if not, do not use it.
TL;DR : Use StratifiedShuffleSplit with test_size=0.25
Scikit-learn provides two modules for Stratified Splitting:
n_folds
training/testing sets such that classes are equally balanced in both.Heres some code(directly from above documentation)
>>> skf = cross_validation.StratifiedKFold(y, n_folds=2) #2-fold cross validation
>>> len(skf)
2
>>> for train_index, test_index in skf:
... print("TRAIN:", train_index, "TEST:", test_index)
... X_train, X_test = X[train_index], X[test_index]
... y_train, y_test = y[train_index], y[test_index]
... #fit and predict with X_train/test. Use accuracy metrics to check validation performance
n_iter=1
. You can mention the test-size here same as in train_test_split
Code:
>>> sss = StratifiedShuffleSplit(y, n_iter=1, test_size=0.5, random_state=0)
>>> len(sss)
1
>>> for train_index, test_index in sss:
... print("TRAIN:", train_index, "TEST:", test_index)
... X_train, X_test = X[train_index], X[test_index]
... y_train, y_test = y[train_index], y[test_index]
>>> # fit and predict with your classifier using the above X/y train/test
Here's a very compact, but entirely correct version:
do while(isspace(*s)) s++; while(*d++ = *s++);
And here, just for my amusement, are code-golfed versions that aren't entirely correct, and get commenters upset.
If you can risk some undefined behavior, and never have empty strings, you can get rid of the body:
while(*(d+=!isspace(*s++)) = *s);
Heck, if by space you mean just space character:
while(*(d+=*s++!=' ')=*s);
Don't use that in production :)
I think they didn't like your response because you gave the technical differences instead of design ones. The question is like a troll question for me. In fact, interfaces and abstract classes have a completely different nature so you cannot really compare them. I will give you my vision of what is the role of an interface and what is the role of an abstract class.
interface: is used to ensure a contract and make a low coupling between classes in order to have a more maintainable, scalable and testable application.
abstract class: is only used to factorize some code between classes of the same responsability. Note that this is the main reason why multiple-inheritance is a bad thing in OOP, because a class shouldn't handle many responsabilities (use composition instead).
So interfaces have a real architectural role whereas abstract classes are almost only a detail of implementation (if you use it correctly of course).
If you love one liners, try:
d=eval('{'+re.sub('\'[\s]*?\'','\':\'',re.sub(r'([^'+input('SEP: ')+',]+)','\''+r'\1'+'\'',open(input('FILE: ')).read().rstrip('\n').replace('\n',',')))+'}')
Input FILE = Path to file, SEP = Key-Value separator character
Not the most elegant or efficient way of doing it, but quite interesting nonetheless :)
I solved my problem by running below command
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
temp = bankAccNos.contains(no) ? 1 : 2;
just add using System.Linq
and see the magic happening when you try to access the available methods in the IEnumerable
. Adding this will give you access to method named Count()
as simple as that. just remember to check for null value
before calling count()
:)
I struggled for a while about this. Stupid rule for __init__
. It is two "_" together to be "__"
Applies to Ubuntu 14.04 and later releases. Make sure to backup following files before making any changes.
1.Open /etc/apache2/apache2.conf
and search for <Directory /var/www/>
directive and replace path with /home/<USERNAME>/public_html
. You can use * instead of .
2.Open /etc/apache2/sites-available/000-default.conf
and replace DocumentRoot
value property from /var/www/html
to /home/<USERNAME>/public_html
.
Also <Directory /var/www/html>
to <Directory /home/<USERNAME>/public_html
.
3.Open /etc/mods-available/php7.1.conf
. Find and comment following code
<IfModule mod_userdir.c>
<Directory /home/*/public_html>
php_admin_flag engine Off
</Directory>
</IfModule>
Do not turn ON php_admin_flag engine OFF
flag as reason is mentioned in comment above Directive code. Also php version can be 5.0, 7.0 or anything which you have installed.
Create public_html
directory in home/<USERNAME>
.
Restart apache service by executing command sudo service apache2 restart
.
Test by running sample script on server.
Simply do this:
<object data="resume.pdf" type="application/pdf" width="100%" height="800px">
<p>It appears you don't have a PDF plugin for this browser.
No biggie... you can <a href="resume.pdf">click here to
download the PDF file.</a></p>
</object>
You can use
$window.scrollTo(x, y);
where x
is the pixel along the horizontal axis and y
is the pixel along the vertical axis.
Scroll to top
$window.scrollTo(0, 0);
Focus on element
$window.scrollTo(0, angular.element('put here your element').offsetTop);
Update:
Also you can use $anchorScroll
If you don't need to access the toggle from outside the element, this code works without a data variable:
<a @click="e => e.target.classList.toggle('active')"></a>
It's easier to kill a session, when some meaningful name is given:
//Creation:
screen -S some_name proc
// Kill detached session
screen -S some_name -X quit
Regarding the differences between json
and jsonb
datatypes, it worth mentioning the official explanation:
PostgreSQL offers two types for storing JSON data:
json
andjsonb
. To implement efficient query mechanisms for these data types, PostgreSQL also provides the jsonpath data type described in Section 8.14.6.The
json
andjsonb
data types accept almost identical sets of values as input. The major practical difference is one of efficiency. Thejson
data type stores an exact copy of the input text, which processing functions must reparse on each execution; whilejsonb
data is stored in a decomposed binary format that makes it slightly slower to input due to added conversion overhead, but significantly faster to process, since no reparsing is needed.jsonb
also supports indexing, which can be a significant advantage.Because the
json
type stores an exact copy of the input text, it will preserve semantically-insignificant white space between tokens, as well as the order of keys within JSON objects. Also, if a JSON object within the value contains the same key more than once, all the key/value pairs are kept. (The processing functions consider the last value as the operative one.) By contrast,jsonb
does not preserve white space, does not preserve the order of object keys, and does not keep duplicate object keys. If duplicate keys are specified in the input, only the last value is kept.In general, most applications should prefer to store JSON data as
jsonb
, unless there are quite specialized needs, such as legacy assumptions about ordering of object keys.PostgreSQL allows only one character set encoding per database. It is therefore not possible for the JSON types to conform rigidly to the JSON specification unless the database encoding is UTF8. Attempts to directly include characters that cannot be represented in the database encoding will fail; conversely, characters that can be represented in the database encoding but not in UTF8 will be allowed.
Source: https://www.postgresql.org/docs/current/datatype-json.html
Filter: - A filter as the name suggests is a Java class executed by the servlet container for each incoming HTTP request and for each http response. This way, is possible to manage HTTP incoming requests before them reach the resource, such as a JSP page, a servlet or a simple static page; in the same way is possible to manage HTTP outbound response after resource execution.
Interceptor: - Spring Interceptors are similar to Servlet Filters but they acts in Spring Context so are many powerful to manage HTTP Request and Response but they can implement more sophisticated behavior because can access to all Spring context.
Another take on this that hasn't been mentioned here is that, when in debug, the project may build, but it won't run, giving the error message displayed in the question.
If this is the case, another option to look at is the output file versus the target file. These should match.
A quick way to check the output file is to go to the project's property pages, then go to Configuration Properties -> Linker -> General (In VS 2013 - exact path may vary depending on IDE version).
There is an "Output File" setting. If it is not $(OutDir)$(TargetName)$(TargetExt)
, then you may run into issues.
This is also discussed in more detail here.
The maximum safe UDP payload is 508 bytes. This is a packet size of 576 (the "minimum maximum reassembly buffer size"), minus the maximum 60-byte IP header and the 8-byte UDP header.
Any UDP payload this size or smaller is guaranteed to be deliverable over IP (though not guaranteed to be delivered). Anything larger is allowed to be outright dropped by any router for any reason. Except on an IPv6-only route, where the maximum payload is 1,212 bytes. As others have mentioned, additional protocol headers could be added in some circumstances. A more conservative value of around 300-400 bytes may be preferred instead.
The maximum possible UDP payload is 67 KB, split into 45 IP packets, adding an additional 900 bytes of overhead (IPv4, MTU 1500, minimal 20-byte IP headers).
Any UDP packet may be fragmented. But this isn't too important, because losing a fragment has the same effect as losing an unfragmented packet: the entire packet is dropped. With UDP, this is going to happen either way.
IP packets include a fragment offset field, which indicates the byte offset of the UDP fragment in relation to its UDP packet. This field is 13-bit, allowing 8,192 values, which are in 8-byte units. So the range of such offsets an IP packet can refer to is 0...65,528 bytes. Being an offset, we add 1,480 for the last UDP fragment to get 67,008. Minus the UDP header in the first fragment gives us a nice, round 67 KB.
Sources: RFC 791, RFC 1122, RFC 2460
Handles either type of line break
str.replace(new RegExp('\r?\n','g'), '<br />');
And if you just want to get the directory name and no need for the filename coming with it, then you can do that in the following conventional way using os
Python module.
>>> import os
>>> f = open('/Users/Desktop/febROSTER2012.xls')
>>> os.path.dirname(f.name)
>>> '/Users/Desktop/'
This way you can get hold of the directory structure.
An educational example from the stat documentation:
import os, sys
from stat import *
def walktree(top, callback):
'''recursively descend the directory tree rooted at top,
calling the callback function for each regular file'''
for f in os.listdir(top):
pathname = os.path.join(top, f)
mode = os.stat(pathname)[ST_MODE]
if S_ISDIR(mode):
# It's a directory, recurse into it
walktree(pathname, callback)
elif S_ISREG(mode):
# It's a file, call the callback function
callback(pathname)
else:
# Unknown file type, print a message
print 'Skipping %s' % pathname
def visitfile(file):
print 'visiting', file
if __name__ == '__main__':
walktree(sys.argv[1], visitfile)
Normally the native way we do things in linux and the way we think is from left to right.
So you would go and write what you are looking for first:
find / -name "*.php"
Then you probably hit enter and realize you are getting too many files from
directories you wish not to.
Let's exclude /media to avoid searching your mounted drives.
You should now just APPEND the following to the previous command:
-print -o -path '/media' -prune
so the final command is:
find / -name "*.php" -print -o -path '/media' -prune
...............|<--- Include --->|....................|<---------- Exclude --------->|
I think this structure is much easier and correlates to the right approach
An object and an instance are the same thing.
Personally I prefer to use the word "instance" when referring to a specific object of a specific type, for example "an instance of type Foo". But when talking about objects in general I would say "objects" rather than "instances".
A reference either refers to a specific object or else it can be a null reference.
They say that they have to create an instance to their application. What does it mean?
They probably mean you have to write something like this:
Foo foo = new Foo();
If you are unsure what type you should instantiate you should contact the developers of the application and ask for a more complete example.
Easy to map different set of list by linq without for loop
var List1= new List<Entities1>();
var List2= new List<Entities2>();
var List2 = List1.Select(p => new Entities2
{
EntityCode = p.EntityCode,
EntityId = p.EntityId,
EntityName = p.EntityName
}).ToList();
You can use deletgate
with scp
too:
- name: Copy file to another server
become: true
shell: "scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null admin@{{ inventory_hostname }}:/tmp/file.yml /tmp/file.yml"
delegate_to: other.example.com
Because of delegate
the command is run on the other server and it scp
's the file to itself.
I got really tired of going through answers only to find it did not work as expected.
Solution
Make a vbs script to run a hidden batch file which launches the powershell script. Seems silly to make 3 files for this task but atleast the total size is less than 2KB and it runs perfect from tasker or manually (you dont see anything).
scriptName.vbs
Set WinScriptHost = CreateObject("WScript.Shell")
WinScriptHost.Run Chr(34) & "C:\Users\leathan\Documents\scriptName.bat" & Chr(34), 0
Set WinScriptHost = Nothing
scriptName.bat
powershell.exe -ExecutionPolicy Bypass C:\Users\leathan\Documents\scriptName.ps1
scriptName.ps1
Your magical code here.
Restarting all dynos in heroku did the trick for me
One can also nullify parent's line height:
#wrapper {
line-height: 0;
}
All fixes: http://jsfiddle.net/FaPFv/
Instead of passing an anonymous type, pass a List of a dynamic type:
var dynamicResult = anonymousQueryResult.ToList<dynamic>();
DoSomething(List<dynamic> _dynamicResult)
DoSomething(dynamicResult);
Thanks to Petar Ivanov!
You're nearly there!
For a bold text, you should have this: <b> bold text</b>
or <strong>bold text</strong>
They have the same result.
Working example - JSfiddle
colorRampPalette
could be your friend here:
colfunc <- colorRampPalette(c("black", "white"))
colfunc(10)
# [1] "#000000" "#1C1C1C" "#383838" "#555555" "#717171" "#8D8D8D" "#AAAAAA"
# [8] "#C6C6C6" "#E2E2E2" "#FFFFFF"
And just to show it works:
plot(rep(1,10),col=colfunc(10),pch=19,cex=3)
For me both keys for sql-mode
worked. Whether I used
# dash no quotes
sql-mode=NO_ENGINE_SUBSTITUTION
or
# underscore no quotes
sql_mode=NO_ENGINE_SUBSTITUTION
in the my.ini
file made no difference and both were accepted, as far as I could test it.
What actually made a difference was a missing newline at the end of the my.ini
file.
So everyone having problems with this or similar problems with my.ini
/my.cnf
: Make sure there is a blank line at the end of the file!
Tested using MySQL 5.7.27.
To kill process by keyword midori
, for example:
kill -SIGTERM $(pgrep -i midori)
You could keep it simple and use the native color translator:
Color red = ColorTranslator.FromHtml("#FF0000");
string redHex = ColorTranslator.ToHtml(red);
Then break the three color pairs into integer form:
int value = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
This means you are using JPA or hibernate in your code and performing modifying operation on DB without making the business logic transaction. So simple solution for this is mark your piece of code @Transactional
If you want to check if a string contains substring or not using regex, the closest you can do is by using find() -
private static final validPattern = "\\bstores\\b.*\\bstore\\b.*\\bproduct\\b"
Pattern pattern = Pattern.compile(validPattern);
Matcher matcher = pattern.matcher(inputString);
System.out.print(matcher.find()); // should print true or false.
Note the difference between matches() and find(), matches() return true if the whole string matches the given pattern. find() tries to find a substring that matches the pattern in a given input string. Also by using find() you don't have to add extra matching like - (?s).* at the beginning and .* at the end of your regex pattern.