Most documentation and tutorials use Python's Threading
and Queue
module, and they could seem overwhelming for beginners.
Perhaps consider the concurrent.futures.ThreadPoolExecutor
module of Python 3.
Combined with with
clause and list comprehension it could be a real charm.
from concurrent.futures import ThreadPoolExecutor, as_completed
def get_url(url):
# Your actual program here. Using threading.Lock() if necessary
return ""
# List of URLs to fetch
urls = ["url1", "url2"]
with ThreadPoolExecutor(max_workers = 5) as executor:
# Create threads
futures = {executor.submit(get_url, url) for url in urls}
# as_completed() gives you the threads once finished
for f in as_completed(futures):
# Get the results
rs = f.result()
I faced with the similar issue, and just knowing the arrayList is a resizable-array implementation of the List interface, I also expect you can add element to any point, but at least have the option to define the initial size. Anyway, you can create an array first and convert that to a list like:
int index = 5;
int size = 10;
Integer[] array = new Integer[size];
array[index] = value;
...
List<Integer> list = Arrays.asList(array);
or
List<Integer> list = Arrays.asList(new Integer[size]);
list.set(index, value);
Yes, it is an old question, but I had to post this one, because it is even a little shorter than the similar ones. Yes, the result looks scrambled, but if it is just about even length...
>>> n = 3 # number of groups
>>> biglist = range(30)
>>>
>>> [ biglist[i::n] for i in xrange(n) ]
[[0, 3, 6, 9, 12, 15, 18, 21, 24, 27],
[1, 4, 7, 10, 13, 16, 19, 22, 25, 28],
[2, 5, 8, 11, 14, 17, 20, 23, 26, 29]]
If you have already staged files, simply unstage them:
git reset HEAD [file-name-A.ext] [file-name-B.ext]
Then add them bit by bit back in.
If useful, try this:
BufferedImage imgBuffer = ImageIO.read(new File("c:\\image.bmp"));
byte[] pixels = (byte[])imgBuffer.getRaster().getDataElements(0, 0, imgBuffer.getWidth(), imgBuffer.getHeight(), null);
(new to nginx) In my case it was wrong folder name
For config
upstream serv {
server ex2_app_1:3000;
}
make sure the app folder is in ex2 folder:
ex2/app/...
As mentionned in comments: you need a way to send your static files to the client. This can be achieved with a reverse proxy like Nginx, or simply using express.static().
Put all your "static" (css, js, images) files in a folder dedicated to it, different from where you put your "views" (html files in your case). I'll call it static
for the example. Once it's done, add this line in your server code:
app.use("/static", express.static('./static/'));
This will effectively serve every file in your "static" folder via the /static route.
Querying your index.js file in the client thus becomes:
<script src="static/index.js"></script>
Another option to check your xpath is to use selenium IDE.
You are correct that your cTag class must implement IComparable<T>
interface. Then you can just call Sort()
on your list.
To implement IComparable<T>
interface, you must implement CompareTo(T other)
method. The easiest way to do this is to call CompareTo method of the field you want to compare, which in your case is date.
public class cTag:IComparable<cTag> {
public int id { get; set; }
public int regnumber { get; set; }
public string date { get; set; }
public int CompareTo(cTag other) {
return date.CompareTo(other.date);
}
}
However, this wouldn't sort well, because this would use classic sorting on strings (since you declared date as string). So I think the best think to do would be to redefine the class and to declare date not as string, but as DateTime. The code would stay almost the same:
public class cTag:IComparable<cTag> {
public int id { get; set; }
public int regnumber { get; set; }
public DateTime date { get; set; }
public int CompareTo(cTag other) {
return date.CompareTo(other.date);
}
}
Only thing you'd have to do when creating the instance of the class to convert your string containing the date into DateTime type, but it can be done easily e.g. by DateTime.Parse(String)
method.
numbers = [1, 2, 3]
numsum = sum(list(numbers))
print(numsum)
This would work, if your are trying to Sum up a list.
To turn it off and return to the normal mode
np.set_printoptions(threshold=False)
Have you tried it. Don't put everything in single line.
-vm
C:\Program Files\Java\jdk1.6.0_07\bin\
Need to put the folder that contains the javaw or java executable. Under Ubuntu 18 with eclipse 4.7.1 I was able to get it to run with:
-vm
/usr/lib/jvm/java-8-openjdk-amd64/bin
-startup
plugins/org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.500.v20170531-1133
-vmargs
-Xmx2G
-Xms200m
-XX:MaxPermSize=384m
If it doesn't work then please confirm you have added above lines before -vmargs
in eclipse.ini
.
We can use replace
to change the values in 'mpg' to NA
that corresponds to cyl==4
.
mtcars %>%
mutate(mpg=replace(mpg, cyl==4, NA)) %>%
as.data.frame()
Receive POST and GET request in nodejs :
1).Server
var http = require('http');
var server = http.createServer ( function(request,response){
response.writeHead(200,{"Content-Type":"text\plain"});
if(request.method == "GET")
{
response.end("received GET request.")
}
else if(request.method == "POST")
{
response.end("received POST request.");
}
else
{
response.end("Undefined request .");
}
});
server.listen(8000);
console.log("Server running on port 8000");
2). Client :
var http = require('http');
var option = {
hostname : "localhost" ,
port : 8000 ,
method : "POST",
path : "/"
}
var request = http.request(option , function(resp){
resp.on("data",function(chunck){
console.log(chunck.toString());
})
})
request.end();
Use:
set serveroutput on
variable n number
exec :n := dbms_utility.get_time;
select ......
exec dbms_output.put_line( (dbms_utility.get_time-:n)/100) || ' seconds....' );
Or possibly:
SET TIMING ON;
-- do stuff
SET TIMING OFF;
...to get the hundredths of seconds that elapsed.
In either case, time elapsed can be impacted by server load/etc.
Reference:
A little hint. The message often appears during rename operation. The quick workaround for me is pressing Ctrl-Y
(redo shortcut) after message confirmation. It works only if the renaming affects a single file.
Use:
echo %time% & dir & echo %time%
This is, from memory, equivalent to the semi-colon separator in bash
and other UNIXy shells.
There's also &&
(or ||
) which only executes the second command if the first succeeded (or failed), but the single ampersand &
is what you're looking for here.
That's likely to give you the same time however since environment variables tend to be evaluated on read rather than execute.
You can get round this by turning on delayed expansion:
pax> cmd /v:on /c "echo !time! & ping 127.0.0.1 >nul: & echo !time!"
15:23:36.77
15:23:39.85
That's needed from the command line. If you're doing this inside a script, you can just use setlocal
:
@setlocal enableextensions enabledelayedexpansion
@echo off
echo !time! & ping 127.0.0.1 >nul: & echo !time!
endlocal
Adding to C2H5OH's answer, in Python 3.6+ you can use format strings to make it a bit cleaner:
s = "something about cupcakes"
print(f"L{s}LL")
Try something like this:
var prop;
for(prop in obj) {
if(!obj.hasOwnProperty(prop)) continue;
console.log(prop + " - "+ obj[prop]);
}
It probably aimed to select all the informations in your table. If you use this kind of query (for example in PHP) :
mysql_query("SELECT * FROM newsletter WHERE email = '$email'");
The email ' OR 1=1/* will give this kind of query :
mysql_query("SELECT * FROM newsletter WHERE email = '' OR 1=1/*");
So it selects all the rows (because 1=1 is always true and the rest of the query is 'commented'). But it was not successful
You can find the number of members in a Javascript array by using its length
property:
var number = $scope.names.length;
Docs - Array.prototype.length
You are passing hello()
as a string, also hello()
means execute hello
immediately.
try
onClick={hello}
UPDATE:
onActivityCreated()
is deprecated from API Level 28.
onCreate():
The onCreate()
method in a Fragment
is called after the Activity
's onAttachFragment()
but before that Fragment
's onCreateView()
.
In this method, you can assign variables, get Intent
extras, and anything else that doesn't involve the View hierarchy (i.e. non-graphical initialisations). This is because this method can be called when the Activity
's onCreate()
is not finished, and so trying to access the View hierarchy here may result in a crash.
onCreateView():
After the onCreate()
is called (in the Fragment
), the Fragment
's onCreateView()
is called. You can assign your View
variables and do any graphical initialisations. You are expected to return a View
from this method, and this is the main UI view, but if your Fragment
does not use any layouts or graphics, you can return null
(happens by default if you don't override).
onActivityCreated():
As the name states, this is called after the Activity
's onCreate()
has completed. It is called after onCreateView()
, and is mainly used for final initialisations (for example, modifying UI elements). This is deprecated from API level 28.
To sum up...
... they are all called in the Fragment
but are called at different times.
The onCreate()
is called first, for doing any non-graphical initialisations. Next, you can assign and declare any View
variables you want to use in onCreateView()
. Afterwards, use onActivityCreated()
to do any final initialisations you want to do once everything has completed.
If you want to view the official Android documentation, it can be found here:
There are also some slightly different, but less developed questions/answers here on Stack Overflow:
Following worked for me:
SpingBoot 2.1.7.RELEASE
YAML Property (Notice value sourrounded by single quotes)
property:
name: '{"key1": false, "key2": false, "key3": true}'
In Java/Kotlin annotate field with (Notice use of #) (For java no need to escape '$' with '\')
@Value("#{\${property.name}}")
I have found that this works quite well
if(col1/col1= 1,'number',col1) AS myInfo
-w
is the GCC-wide option to disable warning messages.
In case anybody has tried to access tabs from within an iframe, you may notice it's not possible. The div
of the tab never gets marked as selected, just as hidden or not hidden. The link itself is the only piece marked as selected.
<li class="ui-state-default ui-corner-top ui-tabs-selected ui-state-active ui-state-focus"><a href="#tabs-4">Tab 5</a></li>
The following will get you the href
value of the link which should be the same as the id for your tab container:
jQuery('.ui-tabs-selected a',window.parent.document).attr('href')
This should also work in place of: $tabs.tabs('option', 'selected');
It's better in the sense that instead of just getting the index of the tab, it gives you the actual id of the tab.
I was able to fix this problem by setting font-size: 0 .
ans=(R)
while True:
print('Your score is so far '+str(myScore)+'.')
print("Would you like to roll or quit?")
ans=input("Roll...")
if ans=='R':
R=random.randint(1, 8)
print("You rolled a "+str(R)+".")
myScore=R+myScore
else:
print("Now I'll see if I can break your score...")
ans = False
break
Oracle does not allow joining tables in an UPDATE statement. You need to rewrite your statement with a co-related sub-select
Something like this:
UPDATE system_info
SET field_value = 'NewValue'
WHERE field_desc IN (SELECT role_type
FROM system_users
WHERE user_name = 'uname')
For a complete description on the (valid) syntax of the UPDATE statement, please read the manual:
http://docs.oracle.com/cd/E11882_01/server.112/e26088/statements_10008.htm#i2067715
say you define the static getFactorial
function inside a CodeController
then this is the way you need to call a static function, because static properties and methods exists with in the class, not in the objects created using the class.
CodeController::getFactorial($index);
----------------UPDATE----------------
To best practice I think you can put this kind of functions inside a separate file so you can maintain with more easily.
to do that
create a folder inside app
directory and name it as lib
(you can put a name you like).
this folder to needs to be autoload to do that add app/lib
to composer.json
as below. and run the composer dumpautoload
command.
"autoload": {
"classmap": [
"app/commands",
"app/controllers",
............
"app/lib"
]
},
then files inside lib
will autoloaded.
then create a file inside lib
, i name it helperFunctions.php
inside that define the function.
if ( ! function_exists('getFactorial'))
{
/**
* return the factorial of a number
*
* @param $number
* @return string
*/
function getFactorial($date)
{
$fact = 1;
for($i = 1; $i <= $num ;$i++)
$fact = $fact * $i;
return $fact;
}
}
and call it anywhere within the app as
$fatorial_value = getFactorial(225);
LCASE or UCASE respectively.
Example:
SELECT UCASE(MyColumn) AS Upper, LCASE(MyColumn) AS Lower
FROM MyTable
Here is the solution I was looking for. If you would like to create List2 that contains the difference of the number elements in List1.
list1 = [12, 15, 22, 54, 21, 68, 9, 73, 81, 34, 45]
list2 = []
for i in range(1, len(list1)):
change = list1[i] - list1[i-1]
list2.append(change)
Note that while len(list1)
is 11 (elements), len(list2)
will only be 10 elements because we are starting our for loop from element with index 1 in list1 not from element with index 0 in list1
var elem = document.getElementById("myvideo");
function openFullscreen() {
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) { /* Firefox */
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) { /* Chrome, Safari & Opera */
elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) { /* IE/Edge */
elem.msRequestFullscreen();
}
}
//Internet Explorer 10 and earlier does not support the msRequestFullscreen() method.
You can't do it in a (This isn't quite true, as Sean points out in the comments. See note at the end.)switch
unless you're doing full string matching; that's doing substring matching.
If you're happy that your regex at the top is stripping away everything that you don't want to compare in your match, you don't need a substring match, and could do:
switch (base_url_string) {
case "xxx.local":
// Blah
break;
case "xxx.dev.yyy.com":
// Blah
break;
}
...but again, that only works if that's the complete string you're matching. It would fail if base_url_string
were, say, "yyy.xxx.local" whereas your current code would match that in the "xxx.local" branch.
Update: Okay, so technically you can use a switch
for substring matching, but I wouldn't recommend it in most situations. Here's how (live example):
function test(str) {
switch (true) {
case /xyz/.test(str):
display("• Matched 'xyz' test");
break;
case /test/.test(str):
display("• Matched 'test' test");
break;
case /ing/.test(str):
display("• Matched 'ing' test");
break;
default:
display("• Didn't match any test");
break;
}
}
That works because of the way JavaScript switch
statements work, in particular two key aspects: First, that the cases are considered in source text order, and second that the selector expressions (the bits after the keyword case
) are expressions that are evaluated as that case is evaluated (not constants as in some other languages). So since our test expression is true
, the first case
expression that results in true
will be the one that gets used.
Another slight modification to @Salvador Dali enables a list of columns to exclude:
df[[i for i in list(df.columns) if i not in [list_of_columns_to_exclude]]]
or
df.loc[:,[i for i in list(df.columns) if i not in [list_of_columns_to_exclude]]]
Try using printf
function or the concatination operator
FIRST UPDATE: Before you try this ever in a production environment (not advised), read this first: http://www.javaspecialists.eu/archive/Issue237.html Starting from Java 9, the solution as described won't work anymore, because now Java will store strings as byte[] by default.
SECOND UPDATE: As of 2016-10-25, on my AMDx64 8core and source 1.8, there is no difference between using 'charAt' and field access. It appears that the jvm is sufficiently optimized to inline and streamline any 'string.charAt(n)' calls.
THIRD UPDATE: As of 2020-09-07, on my Ryzen 1950-X 16 core and source 1.14, 'charAt1' is 9 times slower than field access and 'charAt2' is 4 times slower than field access. Field access is back as the clear winner. Note than the program will need to use byte[] access for Java 9+ version jvms.
It all depends on the length of the String
being inspected. If, as the question says, it is for long strings, the fastest way to inspect the string is to use reflection to access the backing char[]
of the string.
A fully randomized benchmark with JDK 8 (win32 and win64) on an 64 AMD Phenom II 4 core 955 @ 3.2 GHZ (in both client mode and server mode) with 9 different techniques (see below!) shows that using String.charAt(n)
is the fastest for small strings and that using reflection
to access the String backing array is almost twice as fast for large strings.
9 different optimization techniques are tried.
All string contents are randomized
The test are done for string sizes in multiples of two starting with 0,1,2,4,8,16 etc.
The tests are done 1,000 times per string size
The tests are shuffled into random order each time. In other words, the tests are done in random order every time they are done, over 1000 times over.
The entire test suite is done forwards, and backwards, to show the effect of JVM warmup on optimization and times.
The entire suite is done twice, once in -client
mode and the other in -server
mode.
For strings 1 to 256 characters in length, calling string.charAt(i)
wins with an average processing of 13.4 million to 588 million characters per second.
Also, it is overall 5.5% faster (client) and 13.9% (server) like this:
for (int i = 0; i < data.length(); i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
than like this with a local final length variable:
final int len = data.length();
for (int i = 0; i < len; i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
For long strings, 512 to 256K characters length, using reflection to access the String's backing array is fastest. This technique is almost twice as fast as String.charAt(i) (178% faster). The average speed over this range was 1.111 billion characters per second.
The Field must be obtained ahead of time and then it can be re-used in the library on different strings. Interestingly, unlike the code above, with Field access, it is 9% faster to have a local final length variable than to use 'chars.length' in the loop check. Here is how Field access can be setup as fastest:
final Field field = String.class.getDeclaredField("value");
field.setAccessible(true);
try {
final char[] chars = (char[]) field.get(data);
final int len = chars.length;
for (int i = 0; i < len; i++) {
if (chars[i] <= ' ') {
doThrow();
}
}
return len;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
Field access starting winning after 32 character length strings in server mode on a 64 bit Java machine on my AMD 64 machine. That was not seen until 512 characters length in client mode.
Also worth noting I think, when I was running JDK 8 (32 bit build) in server mode, the overall performance was 7% slower for both large and small strings. This was with build 121 Dec 2013 of JDK 8 early release. So, for now, it seems that 32 bit server mode is slower than 32 bit client mode.
That being said ... it seems the only server mode that is worth invoking is on a 64 bit machine. Otherwise it actually hampers performance.
For 32 bit build running in -server mode
on an AMD64, I can say this:
Also worth saying, String.chars() (Stream and the parallel version) are a bust. Way slower than any other way. The Streams
API is a rather slow way to perform general string operations.
Java String could have predicate accepting optimized methods such as contains(predicate), forEach(consumer), forEachWithIndex(consumer). Thus, without the need for the user to know the length or repeat calls to String methods, these could help parsing libraries beep-beep beep
speedup.
Keep dreaming :)
Happy Strings!
~SH
"charAt1" -- CHECK THE STRING CONTENTS THE USUAL WAY:
int charAtMethod1(final String data) {
final int len = data.length();
for (int i = 0; i < len; i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
return len;
}
"charAt2" -- SAME AS ABOVE BUT USE String.length() INSTEAD OF MAKING A FINAL LOCAL int FOR THE LENGTh
int charAtMethod2(final String data) {
for (int i = 0; i < data.length(); i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
return data.length();
}
"stream" -- USE THE NEW JAVA-8 String's IntStream AND PASS IT A PREDICATE TO DO THE CHECKING
int streamMethod(final String data, final IntPredicate predicate) {
if (data.chars().anyMatch(predicate)) {
doThrow();
}
return data.length();
}
"streamPara" -- SAME AS ABOVE, BUT OH-LA-LA - GO PARALLEL!!!
// avoid this at all costs
int streamParallelMethod(final String data, IntPredicate predicate) {
if (data.chars().parallel().anyMatch(predicate)) {
doThrow();
}
return data.length();
}
"reuse" -- REFILL A REUSABLE char[] WITH THE STRINGS CONTENTS
int reuseBuffMethod(final char[] reusable, final String data) {
final int len = data.length();
data.getChars(0, len, reusable, 0);
for (int i = 0; i < len; i++) {
if (reusable[i] <= ' ') {
doThrow();
}
}
return len;
}
"new1" -- OBTAIN A NEW COPY OF THE char[] FROM THE STRING
int newMethod1(final String data) {
final int len = data.length();
final char[] copy = data.toCharArray();
for (int i = 0; i < len; i++) {
if (copy[i] <= ' ') {
doThrow();
}
}
return len;
}
"new2" -- SAME AS ABOVE, BUT USE "FOR-EACH"
int newMethod2(final String data) {
for (final char c : data.toCharArray()) {
if (c <= ' ') {
doThrow();
}
}
return data.length();
}
"field1" -- FANCY!! OBTAIN FIELD FOR ACCESS TO THE STRING'S INTERNAL char[]
int fieldMethod1(final Field field, final String data) {
try {
final char[] chars = (char[]) field.get(data);
final int len = chars.length;
for (int i = 0; i < len; i++) {
if (chars[i] <= ' ') {
doThrow();
}
}
return len;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
"field2" -- SAME AS ABOVE, BUT USE "FOR-EACH"
int fieldMethod2(final Field field, final String data) {
final char[] chars;
try {
chars = (char[]) field.get(data);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
for (final char c : chars) {
if (c <= ' ') {
doThrow();
}
}
return chars.length;
}
-client
MODE (forwards and backwards tests combined)Note: that the -client mode with Java 32 bit and -server mode with Java 64 bit are the same as below on my AMD64 machine.
Size WINNER charAt1 charAt2 stream streamPar reuse new1 new2 field1 field2
1 charAt 77.0 72.0 462.0 584.0 127.5 89.5 86.0 159.5 165.0
2 charAt 38.0 36.5 284.0 32712.5 57.5 48.3 50.3 89.0 91.5
4 charAt 19.5 18.5 458.6 3169.0 33.0 26.8 27.5 54.1 52.6
8 charAt 9.8 9.9 100.5 1370.9 17.3 14.4 15.0 26.9 26.4
16 charAt 6.1 6.5 73.4 857.0 8.4 8.2 8.3 13.6 13.5
32 charAt 3.9 3.7 54.8 428.9 5.0 4.9 4.7 7.0 7.2
64 charAt 2.7 2.6 48.2 232.9 3.0 3.2 3.3 3.9 4.0
128 charAt 2.1 1.9 43.7 138.8 2.1 2.6 2.6 2.4 2.6
256 charAt 1.9 1.6 42.4 90.6 1.7 2.1 2.1 1.7 1.8
512 field1 1.7 1.4 40.6 60.5 1.4 1.9 1.9 1.3 1.4
1,024 field1 1.6 1.4 40.0 45.6 1.2 1.9 2.1 1.0 1.2
2,048 field1 1.6 1.3 40.0 36.2 1.2 1.8 1.7 0.9 1.1
4,096 field1 1.6 1.3 39.7 32.6 1.2 1.8 1.7 0.9 1.0
8,192 field1 1.6 1.3 39.6 30.5 1.2 1.8 1.7 0.9 1.0
16,384 field1 1.6 1.3 39.8 28.4 1.2 1.8 1.7 0.8 1.0
32,768 field1 1.6 1.3 40.0 26.7 1.3 1.8 1.7 0.8 1.0
65,536 field1 1.6 1.3 39.8 26.3 1.3 1.8 1.7 0.8 1.0
131,072 field1 1.6 1.3 40.1 25.4 1.4 1.9 1.8 0.8 1.0
262,144 field1 1.6 1.3 39.6 25.2 1.5 1.9 1.9 0.8 1.0
-server
MODE (forwards and backwards tests combined)Note: this is the test for Java 32 bit running in server mode on an AMD64. The server mode for Java 64 bit was the same as Java 32 bit in client mode except that Field access starting winning after 32 characters size.
Size WINNER charAt1 charAt2 stream streamPar reuse new1 new2 field1 field2
1 charAt 74.5 95.5 524.5 783.0 90.5 102.5 90.5 135.0 151.5
2 charAt 48.5 53.0 305.0 30851.3 59.3 57.5 52.0 88.5 91.8
4 charAt 28.8 32.1 132.8 2465.1 37.6 33.9 32.3 49.0 47.0
8 new2 18.0 18.6 63.4 1541.3 18.5 17.9 17.6 25.4 25.8
16 new2 14.0 14.7 129.4 1034.7 12.5 16.2 12.0 16.0 16.6
32 new2 7.8 9.1 19.3 431.5 8.1 7.0 6.7 7.9 8.7
64 reuse 6.1 7.5 11.7 204.7 3.5 3.9 4.3 4.2 4.1
128 reuse 6.8 6.8 9.0 101.0 2.6 3.0 3.0 2.6 2.7
256 field2 6.2 6.5 6.9 57.2 2.4 2.7 2.9 2.3 2.3
512 reuse 4.3 4.9 5.8 28.2 2.0 2.6 2.6 2.1 2.1
1,024 charAt 2.0 1.8 5.3 17.6 2.1 2.5 3.5 2.0 2.0
2,048 charAt 1.9 1.7 5.2 11.9 2.2 3.0 2.6 2.0 2.0
4,096 charAt 1.9 1.7 5.1 8.7 2.1 2.6 2.6 1.9 1.9
8,192 charAt 1.9 1.7 5.1 7.6 2.2 2.5 2.6 1.9 1.9
16,384 charAt 1.9 1.7 5.1 6.9 2.2 2.5 2.5 1.9 1.9
32,768 charAt 1.9 1.7 5.1 6.1 2.2 2.5 2.5 1.9 1.9
65,536 charAt 1.9 1.7 5.1 5.5 2.2 2.4 2.4 1.9 1.9
131,072 charAt 1.9 1.7 5.1 5.4 2.3 2.5 2.5 1.9 1.9
262,144 charAt 1.9 1.7 5.1 5.1 2.3 2.5 2.5 1.9 1.9
(to test on Java 7 and earlier, remove the two streams tests)
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.function.IntPredicate;
/**
* @author Saint Hill <http://stackoverflow.com/users/1584255/saint-hill>
*/
public final class TestStrings {
// we will not test strings longer than 512KM
final int MAX_STRING_SIZE = 1024 * 256;
// for each string size, we will do all the tests
// this many times
final int TRIES_PER_STRING_SIZE = 1000;
public static void main(String[] args) throws Exception {
new TestStrings().run();
}
void run() throws Exception {
// double the length of the data until it reaches MAX chars long
// 0,1,2,4,8,16,32,64,128,256 ...
final List<Integer> sizes = new ArrayList<>();
for (int n = 0; n <= MAX_STRING_SIZE; n = (n == 0 ? 1 : n * 2)) {
sizes.add(n);
}
// CREATE RANDOM (FOR SHUFFLING ORDER OF TESTS)
final Random random = new Random();
System.out.println("Rate in nanoseconds per character inspected.");
System.out.printf("==== FORWARDS (tries per size: %s) ==== \n", TRIES_PER_STRING_SIZE);
printHeadings(TRIES_PER_STRING_SIZE, random);
for (int size : sizes) {
reportResults(size, test(size, TRIES_PER_STRING_SIZE, random));
}
// reverse order or string sizes
Collections.reverse(sizes);
System.out.println("");
System.out.println("Rate in nanoseconds per character inspected.");
System.out.printf("==== BACKWARDS (tries per size: %s) ==== \n", TRIES_PER_STRING_SIZE);
printHeadings(TRIES_PER_STRING_SIZE, random);
for (int size : sizes) {
reportResults(size, test(size, TRIES_PER_STRING_SIZE, random));
}
}
///
///
/// METHODS OF CHECKING THE CONTENTS
/// OF A STRING. ALWAYS CHECKING FOR
/// WHITESPACE (CHAR <=' ')
///
///
// CHECK THE STRING CONTENTS
int charAtMethod1(final String data) {
final int len = data.length();
for (int i = 0; i < len; i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
return len;
}
// SAME AS ABOVE BUT USE String.length()
// instead of making a new final local int
int charAtMethod2(final String data) {
for (int i = 0; i < data.length(); i++) {
if (data.charAt(i) <= ' ') {
doThrow();
}
}
return data.length();
}
// USE new Java-8 String's IntStream
// pass it a PREDICATE to do the checking
int streamMethod(final String data, final IntPredicate predicate) {
if (data.chars().anyMatch(predicate)) {
doThrow();
}
return data.length();
}
// OH LA LA - GO PARALLEL!!!
int streamParallelMethod(final String data, IntPredicate predicate) {
if (data.chars().parallel().anyMatch(predicate)) {
doThrow();
}
return data.length();
}
// Re-fill a resuable char[] with the contents
// of the String's char[]
int reuseBuffMethod(final char[] reusable, final String data) {
final int len = data.length();
data.getChars(0, len, reusable, 0);
for (int i = 0; i < len; i++) {
if (reusable[i] <= ' ') {
doThrow();
}
}
return len;
}
// Obtain a new copy of char[] from String
int newMethod1(final String data) {
final int len = data.length();
final char[] copy = data.toCharArray();
for (int i = 0; i < len; i++) {
if (copy[i] <= ' ') {
doThrow();
}
}
return len;
}
// Obtain a new copy of char[] from String
// but use FOR-EACH
int newMethod2(final String data) {
for (final char c : data.toCharArray()) {
if (c <= ' ') {
doThrow();
}
}
return data.length();
}
// FANCY!
// OBTAIN FIELD FOR ACCESS TO THE STRING'S
// INTERNAL CHAR[]
int fieldMethod1(final Field field, final String data) {
try {
final char[] chars = (char[]) field.get(data);
final int len = chars.length;
for (int i = 0; i < len; i++) {
if (chars[i] <= ' ') {
doThrow();
}
}
return len;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
// same as above but use FOR-EACH
int fieldMethod2(final Field field, final String data) {
final char[] chars;
try {
chars = (char[]) field.get(data);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
for (final char c : chars) {
if (c <= ' ') {
doThrow();
}
}
return chars.length;
}
/**
*
* Make a list of tests. We will shuffle a copy of this list repeatedly
* while we repeat this test.
*
* @param data
* @return
*/
List<Jobber> makeTests(String data) throws Exception {
// make a list of tests
final List<Jobber> tests = new ArrayList<Jobber>();
tests.add(new Jobber("charAt1") {
int check() {
return charAtMethod1(data);
}
});
tests.add(new Jobber("charAt2") {
int check() {
return charAtMethod2(data);
}
});
tests.add(new Jobber("stream") {
final IntPredicate predicate = new IntPredicate() {
public boolean test(int value) {
return value <= ' ';
}
};
int check() {
return streamMethod(data, predicate);
}
});
tests.add(new Jobber("streamPar") {
final IntPredicate predicate = new IntPredicate() {
public boolean test(int value) {
return value <= ' ';
}
};
int check() {
return streamParallelMethod(data, predicate);
}
});
// Reusable char[] method
tests.add(new Jobber("reuse") {
final char[] cbuff = new char[MAX_STRING_SIZE];
int check() {
return reuseBuffMethod(cbuff, data);
}
});
// New char[] from String
tests.add(new Jobber("new1") {
int check() {
return newMethod1(data);
}
});
// New char[] from String
tests.add(new Jobber("new2") {
int check() {
return newMethod2(data);
}
});
// Use reflection for field access
tests.add(new Jobber("field1") {
final Field field;
{
field = String.class.getDeclaredField("value");
field.setAccessible(true);
}
int check() {
return fieldMethod1(field, data);
}
});
// Use reflection for field access
tests.add(new Jobber("field2") {
final Field field;
{
field = String.class.getDeclaredField("value");
field.setAccessible(true);
}
int check() {
return fieldMethod2(field, data);
}
});
return tests;
}
/**
* We use this class to keep track of test results
*/
abstract class Jobber {
final String name;
long nanos;
long chars;
long runs;
Jobber(String name) {
this.name = name;
}
abstract int check();
final double nanosPerChar() {
double charsPerRun = chars / runs;
long nanosPerRun = nanos / runs;
return charsPerRun == 0 ? nanosPerRun : nanosPerRun / charsPerRun;
}
final void run() {
runs++;
long time = System.nanoTime();
chars += check();
nanos += System.nanoTime() - time;
}
}
// MAKE A TEST STRING OF RANDOM CHARACTERS A-Z
private String makeTestString(int testSize, char start, char end) {
Random r = new Random();
char[] data = new char[testSize];
for (int i = 0; i < data.length; i++) {
data[i] = (char) (start + r.nextInt(end));
}
return new String(data);
}
// WE DO THIS IF WE FIND AN ILLEGAL CHARACTER IN THE STRING
public void doThrow() {
throw new RuntimeException("Bzzzt -- Illegal Character!!");
}
/**
* 1. get random string of correct length 2. get tests (List<Jobber>) 3.
* perform tests repeatedly, shuffling each time
*/
List<Jobber> test(int size, int tries, Random random) throws Exception {
String data = makeTestString(size, 'A', 'Z');
List<Jobber> tests = makeTests(data);
List<Jobber> copy = new ArrayList<>(tests);
while (tries-- > 0) {
Collections.shuffle(copy, random);
for (Jobber ti : copy) {
ti.run();
}
}
// check to make sure all char counts the same
long runs = tests.get(0).runs;
long count = tests.get(0).chars;
for (Jobber ti : tests) {
if (ti.runs != runs && ti.chars != count) {
throw new Exception("Char counts should match if all correct algorithms");
}
}
return tests;
}
private void printHeadings(final int TRIES_PER_STRING_SIZE, final Random random) throws Exception {
System.out.print(" Size");
for (Jobber ti : test(0, TRIES_PER_STRING_SIZE, random)) {
System.out.printf("%9s", ti.name);
}
System.out.println("");
}
private void reportResults(int size, List<Jobber> tests) {
System.out.printf("%6d", size);
for (Jobber ti : tests) {
System.out.printf("%,9.2f", ti.nanosPerChar());
}
System.out.println("");
}
}
With Python's time
module you can't get microseconds with %f
.
For those who still want to go with time
module only, here is a workaround:
now = time.time()
mlsec = repr(now).split('.')[1][:3]
print time.strftime("%Y-%m-%d %H:%M:%S.{} %Z".format(mlsec), time.localtime(now))
You should get something like 2017-01-16 16:42:34.625 EET (yes, I use milliseconds as it's fairly enough).
To break the code into details, paste the below code into a Python console:
import time
# Get current timestamp
now = time.time()
# Debug now
now
print now
type(now)
# Debug strf time
struct_now = time.localtime(now)
print struct_now
type(struct_now)
# Print nicely formatted date
print time.strftime("%Y-%m-%d %H:%M:%S %Z", struct_now)
# Get miliseconds
mlsec = repr(now).split('.')[1][:3]
print mlsec
# Get your required timestamp string
timestamp = time.strftime("%Y-%m-%d %H:%M:%S.{} %Z".format(mlsec), struct_now)
print timestamp
For clarification purposes, I also paste my Python 2.7.12 result here:
>>> import time
>>> # get current timestamp
... now = time.time()
>>> # debug now
... now
1484578293.519106
>>> print now
1484578293.52
>>> type(now)
<type 'float'>
>>> # debug strf time
... struct_now = time.localtime(now)
>>> print struct_now
time.struct_time(tm_year=2017, tm_mon=1, tm_mday=16, tm_hour=16, tm_min=51, tm_sec=33, tm_wday=0, tm_yday=16, tm_isdst=0)
>>> type(struct_now)
<type 'time.struct_time'>
>>> # print nicely formatted date
... print time.strftime("%Y-%m-%d %H:%M:%S %Z", struct_now)
2017-01-16 16:51:33 EET
>>> # get miliseconds
... mlsec = repr(now).split('.')[1][:3]
>>> print mlsec
519
>>> # get your required timestamp string
... timestamp = time.strftime("%Y-%m-%d %H:%M:%S.{} %Z".format(mlsec), struct_now)
>>> print timestamp
2017-01-16 16:51:33.519 EET
>>>
static boolean isNegative(double v) {
return new Double(v).toString().startsWith("-");
}
You can take the first string, replace all the @
with vs
using str_replace
, then explode on vs
or vice versa.
You want to do this:
select * from
(
SELECT id, 2 as ordered FROM a -- returns 1,4,2,3
UNION
SELECT id, 1 as ordered FROM b -- returns 2,1
)
order by ordered
Update
I noticed that even though you have two different tables, you join the IDs, that means, if you have 1
in both tables, you are getting only one occurrence. If that's the desired behavior, you should stick to UNION
. If not, change to UNION ALL
.
So I also notice that if you change to the code I proposed, You would start getting both 1
and 2
(from both a
and b
). In that case, you might want to change the proposed code to:
select distinct id from
(
SELECT id, 2 as ordered FROM a -- returns 1,4,2,3
UNION
SELECT id, 1 as ordered FROM b -- returns 2,1
)
order by ordered
If you want to allow a user to add a bunch of new MyObjects to the list, you can do it with a for loop: Let's say I'm creating an ArrayList of Rectangle objects, and each Rectangle has two parameters- length and width.
//here I will create my ArrayList:
ArrayList <Rectangle> rectangles= new ArrayList <>(3);
int length;
int width;
for(int index =0; index <3;index++)
{JOptionPane.showMessageDialog(null, "Rectangle " + (index + 1));
length = JOptionPane.showInputDialog("Enter length");
width = JOptionPane.showInputDialog("Enter width");
//Now I will create my Rectangle and add it to my rectangles ArrayList:
rectangles.add(new Rectangle(length,width));
//This passes the length and width values to the rectangle constructor,
which will create a new Rectangle and add it to the ArrayList.
}
As mentioned above it is not good idea to watch changes directly in store
But in some very rare cases it may be useful for someone, so i will leave this answer. For others cases, please see @gabriel-robert answer
You can do this through state.$watch
. Add this in your created
(or where u need this to be executed) method in component
this.$store.watch(
function (state) {
return state.my_state;
},
function () {
//do something on data change
},
{
deep: true //add this if u need to watch object properties change etc.
}
);
More details: https://vuex.vuejs.org/api/#watch
Make a truth table and use SUMPRODUCT to get the values. Copy this into cell B1 on Sheet2 and copy down as far as you need:=SUMPRODUCT(--($A1 = Sheet1!$A:$A), Sheet1!$B:$B)
the part that creates the truth table is:
--($A1 = Sheet1!$A:$A)
This returns an array of 0's and 1's. 1 when the values match and a 0 when they don't. Then the comma after that will basically do what I call "funny" matrix multiplication and will return the result. I may have misunderstood your question though, are there duplicate values in Column A of Sheet1?
How to debug a MySQL stored procedure.
Poor mans debugger:
Create a table called logtable with two columns, id INT
and log VARCHAR(255)
.
Make the id column autoincrement.
Use this procedure:
delimiter //
DROP PROCEDURE `log_msg`//
CREATE PROCEDURE `log_msg`(msg VARCHAR(255))
BEGIN
insert into logtable select 0, msg;
END
Put this code anywhere you want to log a message to the table.
call log_msg(concat('myvar is: ', myvar, ' and myvar2 is: ', myvar2));
It's a nice quick and dirty little logger to figure out what is going on.
Using HttpClient (Http's replacement) in Angular 4.3+, the entire mapping/casting process is made simpler/eliminated.
Using your CountryData class, you would define a service method like this:
getCountries() {
return this.httpClient.get<CountryData[]>('http://theUrl.com/all');
}
Then when you need it, define an array like this:
countries:CountryData[] = [];
and subscribe to it like this:
this.countryService.getCountries().subscribe(countries => this.countries = countries);
A complete setup answer is posted here also.
First I copied cv2.pyd
from /opencv/build/python/2.7/x86
to C:/Python27/Lib/site-packeges
. The error was
"RuntimeError: module compiled against API version 9 but this version of numpy is 7"
Then I installed numpy-1.8.0-win32-superpack-python2.7.exe
and opencv works fine.
>>> import cv2
>>> print cv2.__version__
2.4.13
Either declare set1 and set2 as floats instead of integers or cast them to floats as part of the calculation:
SET @weight= CAST(@set1 AS float) / CAST(@set2 AS float);
<init-param>
will be used if you want to initialize some parameter for a particular servlet. When request come to servlet first its init
method will be called then doGet/doPost
whereas if you want to initialize some variable for whole application you will need to use <context-param>
. Every servlet will have access to the context variable.
int main()
{
int m;
while(cin>>m)
{
}
}
This would read from standard input if it space separated or line separated .
u must specify the width and height also
<section class="bg-solid-light slideContainer strut-slide-0" style="background-image: url(https://accounts.icharts.net/stage/icharts-images/chartbook-images/Chart1457601371484.png); background-repeat: no-repeat;width: 100%;height: 100%;" >
Small update on Marc we will have additional " , " at the end. i used stuff function to remove extra semicolon .
SELECT STUFF(( SELECT ',' + ModuleValue AS ModuleValue
FROM ModuleValue WHERE ModuleID=@ModuleID
FOR XML PATH('')
), 1, 1, '' )
So the first part of the answer is how to do what the subject asks as this was how I initially interpreted it and a few people seemed to find helpful. The question was since clarified and I've extended the answer to address that.
Setting a timer
First you need to create a Timer (I'm using the java.util
version here):
import java.util.Timer;
..
Timer timer = new Timer();
To run the task once you would do:
timer.schedule(new TimerTask() {
@Override
public void run() {
// Your database code here
}
}, 2*60*1000);
// Since Java-8
timer.schedule(() -> /* your database code here */, 2*60*1000);
To have the task repeat after the duration you would do:
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
// Your database code here
}
}, 2*60*1000, 2*60*1000);
// Since Java-8
timer.scheduleAtFixedRate(() -> /* your database code here */, 2*60*1000, 2*60*1000);
Making a task timeout
To specifically do what the clarified question asks, that is attempting to perform a task for a given period of time, you could do the following:
ExecutorService service = Executors.newSingleThreadExecutor();
try {
Runnable r = new Runnable() {
@Override
public void run() {
// Database task
}
};
Future<?> f = service.submit(r);
f.get(2, TimeUnit.MINUTES); // attempt the task for two minutes
}
catch (final InterruptedException e) {
// The thread was interrupted during sleep, wait or join
}
catch (final TimeoutException e) {
// Took too long!
}
catch (final ExecutionException e) {
// An exception from within the Runnable task
}
finally {
service.shutdown();
}
This will execute normally with exceptions if the task completes within 2 minutes. If it runs longer than that, the TimeoutException will be throw.
One issue is that although you'll get a TimeoutException after the two minutes, the task will actually continue to run, although presumably a database or network connection will eventually time out and throw an exception in the thread. But be aware it could consume resources until that happens.
You only need <script></script>
Tag that's it. <script type="text/javascript"></script>
is not a valid HTML tag, so for best SEO practice use <script></script>
for i in 0..max
puts "Value of local variable is #{i}"
end
This Perl one-liner comments out lines 1 to 3 of the file orig.sh
inclusive (where the first line is numbered 0), and writes the commented version to cmt.sh
.
perl -n -e '$s=1;$e=3; $_="#$_" if $i>=$s&&$i<=$e;print;$i++' orig.sh > cmt.sh
Obviously you can change the boundary numbers as required.
If you want to edit the file in place, it's even shorter:
perl -in -e '$s=1;$e=3; $_="#$_" if $i>=$s&&$i<=$e;print;$i++' orig.sh
$ cat orig.sh
a
b
c
d
e
f
$ perl -n -e '$s=1;$e=3; $_="#$_" if $i>=$s&&$i<=$e;print;$i++' orig.sh > cmt.sh
$ cat cmt.sh
a
#b
#c
#d
e
f
I am facing Same Problem i do following Setup Now Application Work fine
1-
<compilation debug="true" targetFramework="4.7.1">
<assemblies>
<add assembly="netstandard, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=cc7b13ffcd2ddd51"/>
</assemblies>
</compilation>
2- Add Reference
**C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\Common7\IDE\Extensions\Microsoft\ADL
Tools\2.4.0000.0\ASALocalRun\netstandard.dll**
3-
Copy Above Path Dll to Application Bin Folder on web server
BEGIN
-END
blocks are the building blocks of PL/SQL, and each PL/SQL unit is contained within at least one such block. Nesting BEGIN
-END
blocks within PL/SQL blocks is usually done to trap certain exceptions and handle that special exception and then raise unrelated exceptions. Nevertheless, in PL/SQL you (the client) must always issue a commit or rollback for the transaction.
If you wish to have atomic transactions within a PL/SQL containing transaction, you need to declare a PRAGMA AUTONOMOUS_TRANSACTION
in the declaration block. This will ensure that any DML within that block can be committed or rolledback independently of the containing transaction.
However, you cannot declare this pragma for nested blocks. You can only declare this for:
Reference: Oracle
=IIF(Fields!ADPAction.Value.ToString().ToUpper().Contains("FAIL"),"Red","White")
Also need to convert to upper case for comparision is binary test.
I am not really sure why, but as soon as I comment out the following method it works:
connectionDidFinishDownloading:destinationURL:
Furthermore, I don't think you need the methods from the NSUrlConnectionDownloadDelegate protocol, only those from NSURLConnectionDataDelegate, unless you want some download information.
You can make it a non-submitting button (<button type="button">
) and hook something like window.location = 'http://where.you.want/to/go'
into its onclick handler. This does not work without javascript enabled though.
Or you can make it a submit button, and do a redirect on the server, although this obviously requires some kind of server-side logic, but the upside is that is doesn't require javascript.
(actually, forget the second solution - if you can't use a form, the submit button is out)
You should be able to set these via the attr()
or prop()
functions in jQuery as shown below:
jQuery (< 1.7):
// This will disable just the div
$("#dcacl").attr('disabled','disabled');
or
// This will disable everything contained in the div
$("#dcacl").children().attr("disabled","disabled");
jQuery (>= 1.7):
// This will disable just the div
$("#dcacl").prop('disabled',true);
or
// This will disable everything contained in the div
$("#dcacl").children().prop('disabled',true);
or
// disable ALL descendants of the DIV
$("#dcacl *").prop('disabled',true);
Javascript:
// This will disable just the div
document.getElementById("dcalc").disabled = true;
or
// This will disable all the children of the div
var nodes = document.getElementById("dcalc").getElementsByTagName('*');
for(var i = 0; i < nodes.length; i++){
nodes[i].disabled = true;
}
a = np.array([1,2,3])
b = np.array([4,5,6])
np.array((a,b))
works just as well as
np.array([[1,2,3], [4,5,6]])
Regardless of whether it is a list of lists or a list of 1d arrays, np.array
tries to create a 2d array.
But it's also a good idea to understand how np.concatenate
and its family of stack
functions work. In this context concatenate
needs a list of 2d arrays (or any anything that np.array
will turn into a 2d array) as inputs.
np.vstack
first loops though the inputs making sure they are at least 2d, then does concatenate. Functionally it's the same as expanding the dimensions of the arrays yourself.
np.stack
is a new function that joins the arrays on a new dimension. Default behaves just like np.array
.
Look at the code for these functions. If written in Python you can learn quite a bit. For vstack
:
return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
To change your app font follow the following steps:
res
directory create a new directory and name it font
.res
-> values
-> styles.xml
inside <resources>
-> <style>
add your font <item name="android:fontFamily">@font/font_name</item>
.Now all your app text should be in the font that you add.
You can add information about parameters, returns, etc. as well using:
/**
* This is the foo function
* @param bar This is the bar parameter
* @returns returns a string version of bar
*/
function foo(bar: number): string {
return bar.toString()
}
This will cause editors like VS Code to display it as the following:
If you did a new or clean install of OS X version 10.3 or more recent, the default user terminal shell is bash.
Bash is essentially an enhanced and GNU freeware version of the original Bourne shell, sh. If you have previous experience with bash (often the default on GNU/Linux installations), this makes the OS X command-line experience familiar, otherwise consider switching your shell either to tcsh or to zsh, as some find these more user-friendly.
If you upgraded from or use OS X version 10.2.x, 10.1.x or 10.0.x, the default user shell is tcsh, an enhanced version of csh('c-shell'). Early implementations were a bit buggy and the programming syntax a bit weird so it developed a bad rap.
There are still some fundamental differences between mac and linux as Gordon Davisson so aptly lists, for example no useradd
on Mac and ifconfig
works differently.
The following table is useful for knowing the various unix shells.
sh The original Bourne shell Present on every unix system
ksh Original Korn shell Richer shell programming environment than sh
csh Original C-shell C-like syntax; early versions buggy
tcsh Enhanced C-shell User-friendly and less buggy csh implementation
bash GNU Bourne-again shell Enhanced and free sh implementation
zsh Z shell Enhanced, user-friendly ksh-like shell
You may also find these guides helpful:
http://homepage.mac.com/rgriff/files/TerminalBasics.pdf
http://guides.macrumors.com/Terminal
http://www.ofb.biz/safari/article/476.html
On a final note, I am on Linux (Ubuntu 11) and Mac osX so I use bash and the thing I like the most is customizing the .bashrc (source'd from .bash_profile
on OSX) file with aliases, some examples below.
I now placed all my aliases in a separate .bash_aliases file and include it with:
if [ -f ~/.bash_aliases ]; then
. ~/.bash_aliases
fi
in the .bashrc or .bash_profile file.
Note that this is an example of a mac-linux difference because on a Mac you can't have the --color=auto
. The first time I did this (without knowing) I redefined ls
to be invalid which was a bit alarming until I removed --auto-color
!
You may also find https://unix.stackexchange.com/q/127799/10043 useful
# ~/.bash_aliases
# ls variants
#alias l='ls -CF'
alias la='ls -A'
alias l='ls -alFtr'
alias lsd='ls -d .*'
# Various
alias h='history | tail'
alias hg='history | grep'
alias mv='mv -i'
alias zap='rm -i'
# One letter quickies:
alias p='pwd'
alias x='exit'
alias {ack,ak}='ack-grep'
# Directories
alias s='cd ..'
alias play='cd ~/play/'
# Rails
alias src='script/rails console'
alias srs='script/rails server'
alias raked='rake db:drop db:create db:migrate db:seed'
alias rvm-restart='source '\''/home/durrantm/.rvm/scripts/rvm'\'''
alias rrg='rake routes | grep '
alias rspecd='rspec --drb '
#
# DropBox - syncd
WORKBASE="~/Dropbox/97_2012/work"
alias work="cd $WORKBASE"
alias code="cd $WORKBASE/ror/code"
#
# DropNot - NOT syncd !
WORKBASE_GIT="~/Dropnot"
alias {dropnot,not}="cd $WORKBASE_GIT"
alias {webs,ww}="cd $WORKBASE_GIT/webs"
alias {setups,docs}="cd $WORKBASE_GIT/setups_and_docs"
alias {linker,lnk}="cd $WORKBASE_GIT/webs/rails_v3/linker"
#
# git
alias {gsta,gst}='git status'
# Warning: gst conflicts with gnu-smalltalk (when used).
alias {gbra,gb}='git branch'
alias {gco,go}='git checkout'
alias {gcob,gob}='git checkout -b '
alias {gadd,ga}='git add '
alias {gcom,gc}='git commit'
alias {gpul,gl}='git pull '
alias {gpus,gh}='git push '
alias glom='git pull origin master'
alias ghom='git push origin master'
alias gg='git grep '
#
# vim
alias v='vim'
#
# tmux
alias {ton,tn}='tmux set -g mode-mouse on'
alias {tof,tf}='tmux set -g mode-mouse off'
#
# dmc
alias {dmc,dm}='cd ~/Dropnot/webs/rails_v3/dmc/'
alias wf='cd ~/Dropnot/webs/rails_v3/dmc/dmWorkflow'
alias ws='cd ~/Dropnot/webs/rails_v3/dmc/dmStaffing'
<script type="text/javascript" src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js?ver=1.3.2'></script> <script type="text/javascript"> $(document).ready(function() { function myDate(){ var now = new Date(); var outHour = now.getHours(); if (outHour >12){newHour = outHour-12;outHour = newHour;} if(outHour<10){document.getElementById('HourDiv').innerHTML="0"+outHour;} else{document.getElementById('HourDiv').innerHTML=outHour;} var outMin = now.getMinutes(); if(outMin<10){document.getElementById('MinutDiv').innerHTML="0"+outMin;} else{document.getElementById('MinutDiv').innerHTML=outMin;} var outSec = now.getSeconds(); if(outSec<10){document.getElementById('SecDiv').innerHTML="0"+outSec;} else{document.getElementById('SecDiv').innerHTML=outSec;}} myDate(); setInterval(function(){ myDate();}, 1000); }); </script> <style> body {font-family:"Comic Sans MS", cursive;} h1 {text-align:center;background: gray;color:#fff;padding:5px;padding-bottom:10px;} #Content {margin:0 auto;border:solid 1px gray;width:140px;display:table;background:gray;} #HourDiv, #MinutDiv, #SecDiv {float:left;color:#fff;width:40px;text-align:center;font-size:25px;} span {float:left;color:#fff;font-size:25px;} </style> <div id="clockDiv"></div> <h1>My jQery Clock</h1> <div id="Content"> <div id="HourDiv"></div><span>:</span><div id="MinutDiv"></div><span>:</span><div id="SecDiv"></div> </div>
Based on Adam Sills answer above - here's a nice clean extensions method for Contains... :)
///----------------------------------------------------------------------
/// <summary>
/// Determines whether the specified list contains the matching string value
/// </summary>
/// <param name="list">The list.</param>
/// <param name="value">The value to match.</param>
/// <param name="ignoreCase">if set to <c>true</c> the case is ignored.</param>
/// <returns>
/// <c>true</c> if the specified list contais the matching string; otherwise, <c>false</c>.
/// </returns>
///----------------------------------------------------------------------
public static bool Contains(this List<string> list, string value, bool ignoreCase = false)
{
return ignoreCase ?
list.Any(s => s.Equals(value, StringComparison.OrdinalIgnoreCase)) :
list.Contains(value);
}
meshgrid helps in creating a rectangular grid from two 1-D arrays of all pairs of points from the two arrays.
x = np.array([0, 1, 2, 3, 4])
y = np.array([0, 1, 2, 3, 4])
Now, if you have defined a function f(x,y) and you wanna apply this function to all the possible combination of points from the arrays 'x' and 'y', then you can do this:
f(*np.meshgrid(x, y))
Say, if your function just produces the product of two elements, then this is how a cartesian product can be achieved, efficiently for large arrays.
Referred from here
I have another one. I named my css file: default.css. It wouldn't load. When I tried to view it in the browser it showed an empty page.
I changed the name to default_css.css and it started working.
Sortest one...
select top 0 * into #temptable from mytable
Note : This creates an empty copy of temp, But it doesn't create a primary key
Since the question is being tagged for mysql
, I have the following implementation that works for me and I hope similar alternatives would be there for other RDBMS's. Here's the sql:
select YEAR(now()) - YEAR(dob) - ( DAYOFYEAR(now()) < DAYOFYEAR(dob) ) as age
from table
where ...
From this document, this DTU percent is determined by this query:
SELECT end_time,
(SELECT Max(v)
FROM (VALUES (avg_cpu_percent), (avg_data_io_percent),
(avg_log_write_percent)) AS
value(v)) AS [avg_DTU_percent]
FROM sys.dm_db_resource_stats;
looks like the max of avg_cpu_percent
, avg_data_io_percent
and avg_log_write_percent
Reference:
Found the solution myself in the end. The problem was not with the LinearLayout
, but with the ScrollView
(seems weird, considering the fact that the ScrollView
was expanding, while the LinearLayout
wasn't).
The solution was to use android:fillViewport="true"
on the ScrollView
.
The caller-saved / callee-saved terminology is based on a pretty braindead inefficient model of programming where callers actually do save/restore all the call-clobbered registers (instead of keeping long-term-useful values elsewhere), and callees actually do save/restore all the call-preserved registers (instead of just not using some or any of them).
Or you have to understand that "caller-saved" means "saved somehow if you want the value later".
In reality, efficient code lets values get destroyed when they're no longer needed. Compilers typically make functions that save a few call-preserved registers at the start of a function (and restore them at the end). Inside the function, they use those regs for values that need to survive across function calls.
I prefer "call-preserved" vs. "call-clobbered", which are unambiguous and self-describing once you've heard of the basic concept, and don't require any serious mental gymnastics to think about from the caller's perspective or the callee's perspective. (Both terms are from the same perspective).
Plus, these terms differ by more than one letter.
The terms volatile / non-volatile are pretty good, by analogy with storage which loses its value on power-loss or not, (like DRAM vs. Flash). But the C volatile
keyword has a totally different technical meaning, so that's a downside to "(non)-volatile" when describing C calling conventions.
From the callee's perspective, your function can freely overwrite (aka clobber) these registers without saving/restoring.
From a caller's perspective, call foo
destroys (aka clobbers) all the call-clobbered registers, or at least you have to assume it does.
You can write private helper functions that have a custom calling convention, e.g. you know they don't modify a certain register. But if all you know (or want to assume or depend on) is that the target function follows the normal calling convention, then you have to treat a function call as if it does destroy all the call-clobbered registers. That's literally what the name come from: a call clobbers those registers.
Some compilers that do inter-procedural optimization can also create internal-use-only definitions of functions that don't follow the ABI, using a custom calling convention.
From a callee's perspective, these registers can't be modified unless you save the original value somewhere so you can restore it before returning. Or for registers like the stack pointer (which is almost always call-preserved), you can subtract a known offset and add it back again before returning, instead of actually saving the old value anywhere. i.e. you can restore it by dead reckoning, unless you allocate a runtime-variable amount of stack space. Then typically you restore the stack pointer from another register.
A function that can benefit from using a lot of registers can save/restore some call-preserved registers just so it can use them as more temporaries, even if it doesn't make any function calls. Normally you'd only do this after running out of call-clobbered registers to use, because save/restore typically costs a push/pop at the start/end of the function. (Or if your function has multiple exit paths, a pop
in each of them.)
The name "caller-saved" is misleading: you don't have to specially save/restore them. Normally you arrange your code to have values that need to survive a function call in call-preserved registers, or somewhere on the stack, or somewhere else that you can reload from. It's normal to let a call
destroy temporary values.
See for example What registers are preserved through a linux x86-64 function call for the x86-64 System V ABI.
Also, arg-passing registers are always call-clobbered in all function-calling conventions I'm aware of. See Are rdi and rsi caller saved or callee saved registers?
But system-call calling conventions typically make all the registers except the return value call-preserved. (Usually including even condition-codes / flags.) See What are the calling conventions for UNIX & Linux system calls on i386 and x86-64
Origin null
is the local file system, so that suggests that you're loading the HTML page that does the load
call via a file:///
URL (e.g., just double-clicking it in a local file browser or similar). Different browsers take different approaches to applying the Same Origin Policy to local files.
My guess is that you're seeing this using Chrome. Chrome's rules for applying the SOP to local files are very tight, it disallows even loading files from the same directory as the document. So does Opera. Some other browsers, such as Firefox, allow limited access to local files. But basically, using ajax with local resources isn't going to work cross-browser.
If you're just testing something locally that you'll really be deploying to the web, rather than use local files, install a simple web server and test via http://
URLs instead. That gives you a much more accurate security picture.
I was looking for a way to do this in the terminal and filter lines in the normal "grep behaviour". Have your strings in a file strings.txt
:
string1
string2
...
Then you can build a regular expression like (string1|string2|...)
and use it for filtering:
cmd1 | grep -P "($(cat strings.txt | tr '\n' '|' | head -c -1))" | cmd2
Edit: Above only works if you don't use any regex characters, if escaping is required, it could be done like:
cat strings.txt | python3 -c "import re, sys; [sys.stdout.write(re.escape(line[:-1]) + '\n') for line in sys.stdin]" | ...
Ternary expressions are very useful in JS, especially React. Here's a simplified answer to the many good, detailed ones provided.
condition ? expressionIfTrue : expressionIfFalse
Think of expressionIfTrue
as the OG if statement rendering true;
think of expressionIfFalse
as the else statement.
Example:
var x = 1;
(x == 1) ? y=x : y=z;
this checked the value of x, the first y=(value) returned if true, the second return after the colon : returned y=(value) if false.
SQL keywords are case insensitive themselves.
Names of tables, columns etc, have a case sensitivity which is database dependent - you should probably assume that they are case sensitive unless you know otherwise (In many databases they aren't though; in MySQL table names are SOMETIMES case sensitive but most other names are not).
Comparing data using =, >, < etc, has a case awareness which is dependent on the collation settings which are in use on the individual database, table or even column in question. It's normal however, to keep collation fairly consistent within a database. We have a few columns which need to store case-sensitive values; they have a collation specifically set.
From Hmisc::spss.get
:
all(floor(x) == x, na.rm = TRUE)
much safer option, IMHO, since it "bypasses" the machine precision issue. If you try is.integer(floor(1))
, you'll get FALSE
. BTW, your integer will not be saved as integer if it's bigger than .Machine$integer.max
value, which is, by default 2147483647, so either change the integer.max
value, or do the alternative checks...
sleep(3)
is in unistd.h
, not stdlib.h
. Type man 3 sleep
on your command line to confirm for your machine, but I presume you're on a Mac since you're learning Objective-C, and on a Mac, you need unistd.h
.
Using Ramda:
import {addIndex, map} from 'ramda';
const list = [ 'h', 'e', 'l', 'l', 'o'];
const mapIndexed = addIndex(map);
mapIndexed((currElement, index) => {
console.log("The current iteration is: " + index);
console.log("The current element is: " + currElement);
console.log("\n");
return 'X';
}, list);
It is hard to get pip working on El Capitan for several reasons:
/System/Library/
. El Capitan blocks this, which is the error you are running into. /System/Library/
. pip often wants to upgrade these but cannot on El Capitan. /System/Library/
higher in the python search order than /Library/Python/2.7/site-packages
(the system-wide python package location), so even if you manage to install newer versions of some packages, the old ones still get loaded, breaking some dependencies.There are workarounds for all of these at https://apple.stackexchange.com/a/223163/143849 . But you may be best off installing your own version of Python via the standard Python installer, Homebrew or Anaconda.
If you want to see the array as an array, you can say
alert(JSON.stringify(aCustomers));
instead of all those document.write
s.
However, if you want to display them cleanly, one per line, in your popup, do this:
alert(aCustomers.join("\n"));
AccountList.Split("\r\n");
If you're inside a front contoller servlet which is mapped on a prefix pattern such as /foo/*
, then you can just use HttpServletRequest#getPathInfo()
.
String pathInfo = request.getPathInfo();
// ...
Assuming that the servlet in your example is mapped on /secure/*
, then this will return /users
which would be the information of sole interest inside a typical front controller servlet.
If the servlet is however mapped on a suffix pattern such as *.foo
(your URL examples however does not indicate that this is the case), or when you're actually inside a filter (when the to-be-invoked servlet is not necessarily determined yet, so getPathInfo()
could return null
), then your best bet is to substring the request URI yourself based on the context path's length using the usual String
method:
HttpServletRequest request = (HttpServletRequest) req;
String path = request.getRequestURI().substring(request.getContextPath().length());
// ...
This is known as a Shebang
:
http://en.wikipedia.org/wiki/Shebang_(Unix)
#!interpreter [optional-arg]
A shebang is only relevant when a script has the execute permission (e.g. chmod u+x script.sh).
When a shell executes the script it will use the specified interpreter.
Example:
#!/bin/bash
# file: foo.sh
echo 1
$ chmod u+x foo.sh
$ ./foo.sh
1
Try this it will work --
if($('#EventStartTimeMin').val() === " ") {
alert("Please enter start time!");
}
Why not put some junk in your .htaccess file and try to reload apache. If apache fails to start you know its working. Remove the junk then reload apache if it loads congrats you configured .htaccess correctly.
To amend kris' answer, starting with Git 2.20 (Q4 2018), the proper command for git mergetool
will be
git config --global merge.guitool kdiff3
That is because "git mergetool
" learned to take the "--[no-]gui
" option, just like
"git difftool
" does.
See commit c217b93, commit 57ba181, commit 063f2bd (24 Oct 2018) by Denton Liu (Denton-L
).
(Merged by Junio C Hamano -- gitster
-- in commit 87c15d1, 30 Oct 2018)
mergetool
: accept-g/--[no-]gui
as argumentsIn line with how
difftool
accepts a-g/--[no-]gui
option, makemergetool
accept the same option in order to use themerge.guitool
variable to find the default mergetool instead ofmerge.tool
.
I wrote a post a few months back on how to set up user registration and login functionality with Angular, you can check it out at http://jasonwatmore.com/post/2015/03/10/AngularJS-User-Registration-and-Login-Example.aspx
I check if the user is logged in the $locationChangeStart
event, here is my main app.js showing this:
(function () {
'use strict';
angular
.module('app', ['ngRoute', 'ngCookies'])
.config(config)
.run(run);
config.$inject = ['$routeProvider', '$locationProvider'];
function config($routeProvider, $locationProvider) {
$routeProvider
.when('/', {
controller: 'HomeController',
templateUrl: 'home/home.view.html',
controllerAs: 'vm'
})
.when('/login', {
controller: 'LoginController',
templateUrl: 'login/login.view.html',
controllerAs: 'vm'
})
.when('/register', {
controller: 'RegisterController',
templateUrl: 'register/register.view.html',
controllerAs: 'vm'
})
.otherwise({ redirectTo: '/login' });
}
run.$inject = ['$rootScope', '$location', '$cookieStore', '$http'];
function run($rootScope, $location, $cookieStore, $http) {
// keep user logged in after page refresh
$rootScope.globals = $cookieStore.get('globals') || {};
if ($rootScope.globals.currentUser) {
$http.defaults.headers.common['Authorization'] = 'Basic ' + $rootScope.globals.currentUser.authdata; // jshint ignore:line
}
$rootScope.$on('$locationChangeStart', function (event, next, current) {
// redirect to login page if not logged in and trying to access a restricted page
var restrictedPage = $.inArray($location.path(), ['/login', '/register']) === -1;
var loggedIn = $rootScope.globals.currentUser;
if (restrictedPage && !loggedIn) {
$location.path('/login');
}
});
}
})();
Make the area with your data and formulas a Table:
Then adding new information in the next line will copy all formulas in that table for the new line. Data validation will also be applied for the new row as it was for the whole column. This is indeed Excel being smarter with your data.
NO VBA required...
I know this is an old thread but PARTITION is the equiv of GROUP BY not ORDER BY. ORDER BY in this function is . . . ORDER BY. It's just a way to create uniqueness out of redundancy by adding a sequence number. Or you may eliminate the other redundant records by the WHERE clause when referencing the aliased column for the function. However, DISTINCT in the SELECT statement would probably accomplish the same thing in that regard.
If you don't need two-way data-binding:
<select (change)="onChange($event.target.value)">
<option *ngFor="let i of devices">{{i}}</option>
</select>
onChange(deviceValue) {
console.log(deviceValue);
}
For two-way data-binding, separate the event and property bindings:
<select [ngModel]="selectedDevice" (ngModelChange)="onChange($event)" name="sel2">
<option [value]="i" *ngFor="let i of devices">{{i}}</option>
</select>
export class AppComponent {
devices = 'one two three'.split(' ');
selectedDevice = 'two';
onChange(newValue) {
console.log(newValue);
this.selectedDevice = newValue;
// ... do other stuff here ...
}
If devices
is array of objects, bind to ngValue
instead of value
:
<select [ngModel]="selectedDeviceObj" (ngModelChange)="onChangeObj($event)" name="sel3">
<option [ngValue]="i" *ngFor="let i of deviceObjects">{{i.name}}</option>
</select>
{{selectedDeviceObj | json}}
export class AppComponent {
deviceObjects = [{name: 1}, {name: 2}, {name: 3}];
selectedDeviceObj = this.deviceObjects[1];
onChangeObj(newObj) {
console.log(newObj);
this.selectedDeviceObj = newObj;
// ... do other stuff here ...
}
}
Plunker - does not use <form>
Plunker - uses <form>
and uses the new forms API
public class User : List<UserData>
{
public int id { get; set; }
public string screen_name { get; set; }
}
string json = client.DownloadString(url);
JavaScriptSerializer serializer = new JavaScriptSerializer();
var Data = serializer.Deserialize<List<UserData>>(json);
Let's say we have an external table called employee
hive> SHOW CREATE TABLE employee;
OK
CREATE EXTERNAL TABLE employee(
id string,
fname string,
lname string,
salary double)
ROW FORMAT SERDE
'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
WITH SERDEPROPERTIES (
'colelction.delim'=':',
'field.delim'=',',
'line.delim'='\n',
'serialization.format'=',')
STORED AS INPUTFORMAT
'org.apache.hadoop.mapred.TextInputFormat'
OUTPUTFORMAT
'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
LOCATION
'maprfs:/user/hadoop/data/employee'
TBLPROPERTIES (
'COLUMN_STATS_ACCURATE'='false',
'numFiles'='0',
'numRows'='-1',
'rawDataSize'='-1',
'totalSize'='0',
'transient_lastDdlTime'='1487884795')
To create a person
table like employee
CREATE TABLE person LIKE employee;
To create a person
external table like employee
CREATE TABLE person LIKE employee LOCATION 'maprfs:/user/hadoop/data/person';
then use
DESC person;
to see the newly created table schema.
Get-Content
has bad performance; it tries to read the file into memory all at once.
C# (.NET) file reader reads each line one by one
Best Performace
foreach($line in [System.IO.File]::ReadLines("C:\path\to\file.txt"))
{
$line
}
Or slightly less performant
[System.IO.File]::ReadLines("C:\path\to\file.txt") | ForEach-Object {
$_
}
The foreach
statement will likely be slightly faster than ForEach-Object
(see comments below for more information).
Solution:Webview CookieSyncManager
CookieSyncManager cookieSyncManager = CookieSyncManager.createInstance(mWebView.getContext());
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
cookieManager.removeSessionCookie();
cookieManager.setCookie("http://xx.example.com","mid="+MySession.GetSession().sessionId+" ; Domain=.example.com");
cookieSyncManager.sync();
String cookie = cookieManager.getCookie("http://xx.example.com");
Log.d(LOGTAG, "cookie ------>"+cookie);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setWebViewClient(new TuWebViewClient());
mWebView.loadUrl("http://xx.example.com");
{% for source in sources %}
<tr>
<td>{{ source }}</td>
<td>
{% ifequal title source %}
Just now!
{% endifequal %}
</td>
</tr>
{% endfor %}
or
{% for source in sources %}
<tr>
<td>{{ source }}</td>
<td>
{% if title == source %}
Just now!
{% endif %}
</td>
</tr>
{% endfor %}
Guys this is really simple.
login via ssh
into your pi
execute
vncserver -geometry 1200x1600
This will generate a new session :1
connect with your vnc client at ipaddress:1
Thats it.
Use the constructor that takes a File
and a boolean
FileOutputStream(File file, boolean append)
and set the boolean to true
. That way, the data you write will be appended to the end of the file, rather than overwriting what was already there.
Create a function and pass out put parameter as of generic type.
public static T some_function<T>(T out_put_object /*declare as Output object*/)
{
return out_put_object;
}
This article explains exactly how to handle this: How do I... Serialize a hash table in C# when the application requires it?
I hope this is helpful
you would need a parking lot, that holds a multi-dimensional array (specified in the constructor) of a type "space". The parking lot can keep track of how many spaces are taken via calls to functions that fill and empty spaces.Space can hold an enumerated type that tells what kind of space it is. Space also has a method taken(). for the valet parking, just find the first space thats open and put the car there. You will also need a Car object to put in the space, that holds whether it is a handicapped, compact, or regular vehicle.
class ParkingLot
{
Space[][] spaces;
ParkingLot(wide, long); // constructor
FindOpenSpace(TypeOfCar); // find first open space where type matches
}
enum TypeOfSpace = {compact, handicapped, regular };
enum TypeOfCar = {compact, handicapped, regular };
class Space
{
TypeOfSpace type;
bool empty;
// gets and sets here
// make sure car type
}
class car
{
TypeOfCar type;
}
I was recently looking for this very same solution and managed to find a simple one without assigning specific variables for the last selected item and the new selected item. And this question, although very helpful, didn't provide the solution I needed. This solved my problem, I hope it solves yours and others. Thanks.
You can use pure Javascript to achieve this:
var test = true;
if (typeof test === 'boolean')
console.log('test is a boolean!');
If you are currently writing the application, than the answer is to use System.currentTimeMillis or System.nanoTime serve the purpose as pointed by people above.
But if you have already written the code, and you don't want to change it its better to use Spring's method interceptors. So for instance your service is :
public class MyService {
public void doSomething() {
for (int i = 1; i < 10000; i++) {
System.out.println("i=" + i);
}
}
}
To avoid changing the service, you can write your own method interceptor:
public class ServiceMethodInterceptor implements MethodInterceptor {
public Object invoke(MethodInvocation methodInvocation) throws Throwable {
long startTime = System.currentTimeMillis();
Object result = methodInvocation.proceed();
long duration = System.currentTimeMillis() - startTime;
Method method = methodInvocation.getMethod();
String methodName = method.getDeclaringClass().getName() + "." + method.getName();
System.out.println("Method '" + methodName + "' took " + duration + " milliseconds to run");
return null;
}
}
Also there are open source APIs available for Java, e.g. BTrace. or Netbeans profiler as suggested above by @bakkal and @Saikikos. Thanks.
If you are not giving export default then it throws an error. check if you have given module.exports = Speaker; //spelling mistake here you have written exoprts and check in all the modules whether you have exported correct.
UNI: For UNIQUE:
PRI: For PRIMARY:
MUL: For MULTIPLE:
Make sure you are using Javascript module or not?!
if using js6 modules your html events attributes won't work.
in that case you must bring your function from global scope to module scope. Just add this to your javascript file:
window.functionName= functionName;
example:
<h1 onClick="functionName">some thing</h1>
Well without converting the integer to a string you could make a funky loop:
var number = 20000;
var length = 0;
for(i = number; i > 1; ++i){
++length;
i = Math.floor(i/10);
}
alert(length);?
The following script catenates several (relative/absolute) paths (BASEPATH) with a relative path (SUBDIR):
shopt -s extglob
SUBDIR="subdir"
for BASEPATH in '' / base base/ base// /base /base/ /base//; do
echo "BASEPATH = \"$BASEPATH\" --> ${BASEPATH%%+(/)}${BASEPATH:+/}$SUBDIR"
done
The output of which is:
BASEPATH = "" --> subdir
BASEPATH = "/" --> /subdir
BASEPATH = "base" --> base/subdir
BASEPATH = "base/" --> base/subdir
BASEPATH = "base//" --> base/subdir
BASEPATH = "/base" --> /base/subdir
BASEPATH = "/base/" --> /base/subdir
BASEPATH = "/base//" --> /base/subdir
The shopt -s extglob
is only necessary to allow BASEPATH to end on multiple slashes (which is probably nonsense). Without extended globing you can just use:
echo ${BASEPATH%%/}${BASEPATH:+/}$SUBDIR
which would result in the less neat but still working:
BASEPATH = "" --> subdir
BASEPATH = "/" --> /subdir
BASEPATH = "base" --> base/subdir
BASEPATH = "base/" --> base/subdir
BASEPATH = "base//" --> base//subdir
BASEPATH = "/base" --> /base/subdir
BASEPATH = "/base/" --> /base/subdir
BASEPATH = "/base//" --> /base//subdir
In linearLayout
Instead of giving weight to Button
itself , set the weight to <Space>
View this won't stretch the Button
.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="4"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.955">
<Space
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:background="@drawable/ic_baseline_arrow_back_24" />
<Space
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<Button
android:id="@+id/captureButton"
android:layout_width="72dp"
android:layout_height="72dp"
android:background="@drawable/ic_round_camera_24" />
<Space
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
<Button
android:id="@+id/cameraChangerBtn"
android:layout_width="48dp"
android:layout_height="48dp"
android:background="@drawable/ic_round_switch_camera_24" />
<Space
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
as I am using 4 <Space>
I set the android:weightSum="4"
In linear layout
also this is the result ::
What I understand your question is that you want to fetch an element in an ArrayList
at a specific location.
Suppose your list contains Integers 1,2,3,4,5 and you want to fetch the value 3. Then the following lines of code will work.
ArrayList<Integer> list = new ArrayList<Integer>();
if(list.contains(3)){//check if the list contains the element
list.get(list.indexOf(3));//get the element by passing the index of the element
}
Either ways you could use list.get(list.lastIndexOf(3))
Almost correctly.. Look at the joins, you are referring the wrong fields
SELECT student.firstname,
student.lastname,
exam.name,
exam.date,
grade.grade
FROM grade
INNER JOIN student ON student.studentId = grade.fk_studentId
INNER JOIN exam ON exam.examId = grade.fk_examId
ORDER BY exam.date
find . -maxdepth 1 -type d -name [^\.]\* | sed 's:^\./::'
On Ubuntu 20.04:
sudo apt install subversion
I think I had a similar problem in the past, with another python library. I believe that it was a windows permission issue. Try adding "Users" to your python directory, and give them full access.
If you need an asynchronous-friendly version of Array.forEach
and similar, they're available in the Node.js 'async' module: http://github.com/caolan/async ...as a bonus this module also works in the browser.
async.each(openFiles, saveFile, function(err){
// if any of the saves produced an error, err would equal that error
});
ToAddress = "[email protected]"
ToAddress1 = "[email protected]"
ToAddress2 = "[email protected]"
MessageSubject = "It works!."
Set ol = CreateObject("Outlook.Application")
Set newMail = ol.CreateItem(olMailItem)
newMail.Subject = MessageSubject
newMail.RecipIents.Add(ToAddress)
newMail.RecipIents.Add(ToAddress1)
newMail.RecipIents.Add(ToAddress2)
newMail.Send
Use:
overflow: hidden;
height: 100%;
position: fixed;
width: 100%;
In at least in ubuntu 16.10, the default python3
is python3.5
. As such, all of the python3-X
packages will be installed for python3.5 and not for python3.6.
You can verify this by checking the shebang of pip3
:
$ head -n1 $(which pip3)
#!/usr/bin/python3
Fortunately, the pip installed by the python3-pip
package is installed into the "shared" /usr/lib/python3/dist-packages
such that python3.6 can also take advantage of it.
You can install packages for python3.6 by doing:
python3.6 -m pip install ...
For example:
$ python3.6 -m pip install requests
$ python3.6 -c 'import requests; print(requests.__file__)'
/usr/local/lib/python3.6/dist-packages/requests/__init__.py
I am trying to set a JPanel's background using an image, however, every example I find seems to suggest extending the panel with its own class
yes you will have to extend JPanel
and override the paintcomponent(Graphics g)
function to do so.
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(bgImage, 0, 0, null);
}
I have been looking for a way to simply add the image without creating a whole new class and within the same method (trying to keep things organized and simple).
You can use other component which allows to add image as icon directly e.g. JLabel
if you want.
ImageIcon icon = new ImageIcon(imgURL);
JLabel thumb = new JLabel();
thumb.setIcon(icon);
But again in the bracket trying to keep things organized and simple !! what makes you to think that just creating a new class will lead you to a messy world ?
There must be more to a Python dictionary than a table lookup on hash(). By brute experimentation I found this hash collision:
>>> hash(1.1)
2040142438
>>> hash(4504.1)
2040142438
Yet it doesn't break the dictionary:
>>> d = { 1.1: 'a', 4504.1: 'b' }
>>> d[1.1]
'a'
>>> d[4504.1]
'b'
Sanity check:
>>> for k,v in d.items(): print(hash(k))
2040142438
2040142438
Possibly there's another lookup level beyond hash() that avoids collisions between dictionary keys. Or maybe dict() uses a different hash.
(By the way, this in Python 2.7.10. Same story in Python 3.4.3 and 3.5.0 with a collision at hash(1.1) == hash(214748749.8)
.)
After creating your QVBoxLayout
in Qt Designer, right-click on the background of your widget/dialog/window (not the QVBoxLayout
, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout
should now stretch to fit the window and will resize automatically when the entire window is resized.
$("body").css("overflow", "hidden");
$("body").css("overflow", "initial");
Okay I fixed this thing. Had to first convert the projects to Maven Projects, then remove them from the Eclipse workspace, and then re-import them.
> S = matrix(c(1,2,3,4,5,2,1,2,3,4,3,2,1,2,3,4,3,2,1,2,5,4,3,2,1),ncol = 5,byrow = TRUE);S
[,1] [,2] [,3] [,4] [,5]
[1,] 1 2 3 4 5
[2,] 2 1 2 3 4
[3,] 3 2 1 2 3
[4,] 4 3 2 1 2
[5,] 5 4 3 2 1
> S<-S[,-2]
> S
[,1] [,2] [,3] [,4]
[1,] 1 3 4 5
[2,] 2 2 3 4
[3,] 3 1 2 3
[4,] 4 2 1 2
[5,] 5 3 2 1
Just use the command S <- S[,-2]
to remove the second column. Similarly to delete a row, for example, to delete the second row use S <- S[-2,]
.
IList<string> list = new List<string> {"test1", "test2", "test3"}
If you are using jQuery in your project, or are willing to include it you can call nth-last-child
through its selector API (this is this simulated it will cross browser). Here is a link to an nth-last-child
plugin. If you took this method of targeting the elements you were interested in:
$('ul li:nth-last-child(1)').addClass('last');
And then style again the last
class instead of the nth-child
or nth-last-child
pseudo selectors, you will have a much more consistent cross browser experience.
Use the following code to get the response object from the AFHTTPSessionManager
failure block; then you can convert the generic type into the required data type:
id responseObject = [NSJSONSerialization JSONObjectWithData:(NSData *)error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] options:0 error:nil];
Like this:
public String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress.getHostAddress().toString();
}
}
}
} catch (SocketException ex) {
Log.e(LOG_TAG, ex.toString());
}
return null;
}
Check the docs for more info: NetworkInterface.
Loop like
foreach (GridViewRow row in grid.Rows)
{
if (((CheckBox)row.FindControl("chkboxid")).Checked)
{
//read the label
}
}
I have a blog and I had a lot of trouble finding out how to resize my embedded gist. Post manager only allows you to write text, place images and embed HTML code. Blog layout is responsive itself. It's built with Wix. However, embedded HTML is not. I read a lot about how it's impossible to resize components inside body of generated iFrames. So, here is my suggestion:
If you only have one component inside your iFrame, i.e. your gist, you can resize only the gist. Forget about the iFrame.
I had problems with viewport, specific layouts to different user agents and this is what solved my problem:
<script language="javascript" type="text/javascript" src="https://gist.github.com/roliveiravictor/447f994a82238247f83919e75e391c6f.js"></script>
<script language="javascript" type="text/javascript">
function windowSize() {
let gist = document.querySelector('#gist92442763');
let isMobile = {
Android: function() {
return /Android/i.test(navigator.userAgent)
},
BlackBerry: function() {
return /BlackBerry/i.test(navigator.userAgent)
},
iOS: function() {
return /iPhone|iPod/i.test(navigator.userAgent)
},
Opera: function() {
return /Opera Mini/i.test(navigator.userAgent)
},
Windows: function() {
return /IEMobile/i.test(navigator.userAgent) || /WPDesktop/i.test(navigator.userAgent)
},
any: function() {
return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows());
}
};
if(isMobile.any()) {
gist.style.width = "36%";
gist.style.WebkitOverflowScrolling = "touch"
gist.style.position = "absolute"
} else {
gist.style.width = "auto !important";
}
}
windowSize();
window.addEventListener('onresize', function() {
windowSize();
});
</script>
<style type="text/css">
.gist-data {
max-height: 300px;
}
.gist-meta {
display: none;
}
</style>
The logic is to set gist (or your component) css based on user agent. Make sure to identify your component first, before applying to query selector. Feel free to take a look how responsiveness is working.
I have to set the selection style to UITableViewCellSelectionStyleDefault
for custom background color to work. If any other style, the custom background color will be ignored. Tested on iOS 8.
The full code for the cell as follows:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"MyCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// This is how you change the background color
cell.selectionStyle = UITableViewCellSelectionStyleDefault;
UIView *bgColorView = [[UIView alloc] init];
bgColorView.backgroundColor = [UIColor redColor];
[cell setSelectedBackgroundView:bgColorView];
return cell;
}
I think you want a pipelined table function.
Something like this:
CREATE OR REPLACE PACKAGE test AS
TYPE measure_record IS RECORD(
l4_id VARCHAR2(50),
l6_id VARCHAR2(50),
l8_id VARCHAR2(50),
year NUMBER,
period NUMBER,
VALUE NUMBER);
TYPE measure_table IS TABLE OF measure_record;
FUNCTION get_ups(foo NUMBER)
RETURN measure_table
PIPELINED;
END;
CREATE OR REPLACE PACKAGE BODY test AS
FUNCTION get_ups(foo number)
RETURN measure_table
PIPELINED IS
rec measure_record;
BEGIN
SELECT 'foo', 'bar', 'baz', 2010, 5, 13
INTO rec
FROM DUAL;
-- you would usually have a cursor and a loop here
PIPE ROW (rec);
RETURN;
END get_ups;
END;
For simplicity I removed your parameters and didn't implement a loop in the function, but you can see the principle.
Usage:
SELECT *
FROM table(test.get_ups(0));
L4_ID L6_ID L8_ID YEAR PERIOD VALUE
----- ----- ----- ---------- ---------- ----------
foo bar baz 2010 5 13
1 row selected.
Using a UI Framework would be a lot cleaner (and involve fewer components). Here is an example using wxPython:
import wx
import os
class MyForm(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, "Launch Scripts")
panel = wx.Panel(self, wx.ID_ANY)
sizer = wx.BoxSizer(wx.VERTICAL)
buttonA = wx.Button(panel, id=wx.ID_ANY, label="App A", name="MYSCRIPT")
buttonB = wx.Button(panel, id=wx.ID_ANY, label="App B", name="MYOtherSCRIPT")
buttonC = wx.Button(panel, id=wx.ID_ANY, label="App C", name="SomeDifferentScript")
buttons = [buttonA, buttonB, buttonC]
for button in buttons:
self.buildButtons(button, sizer)
panel.SetSizer(sizer)
def buildButtons(self, btn, sizer):
btn.Bind(wx.EVT_BUTTON, self.onButton)
sizer.Add(btn, 0, wx.ALL, 5)
def onButton(self, event):
"""
This method is fired when its corresponding button is pressed, taking the script from it's name
"""
button = event.GetEventObject()
os.system('python {}.py'.format(button.GetName()))
button_id = event.GetId()
button_by_id = self.FindWindowById(button_id)
print "The button you pressed was labeled: " + button_by_id.GetLabel()
print "The button's name is " + button_by_id.GetName()
# Run the program
if __name__ == "__main__":
app = wx.App(False)
frame = MyForm()
frame.Show()
app.MainLoop()
I haven't tested this yet, and I'm sure there are cleaner ways of launching a python script form a python script, but the idea I think will still hold. Good luck!
>>> def func():
... return [1,2,3]
...
>>> a,b,c = func()
>>> a
1
>>> b
2
>>> c
3
I think you can use the nrows
parameter. From the docs:
nrows : int, default None
Number of rows of file to read. Useful for reading pieces of large files
which seems to work. Using one of the standard large test files (988504479 bytes, 5344499 lines):
In [1]: import pandas as pd
In [2]: time z = pd.read_csv("P00000001-ALL.csv", nrows=20)
CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
Wall time: 0.00 s
In [3]: len(z)
Out[3]: 20
In [4]: time z = pd.read_csv("P00000001-ALL.csv")
CPU times: user 27.63 s, sys: 1.92 s, total: 29.55 s
Wall time: 30.23 s
Complete Code to send Email Using nodemailer Module
var mailer = require("nodemailer");
// Use Smtp Protocol to send Email
var smtpTransport = mailer.createTransport("SMTP",{
service: "Gmail",
auth: {
user: "[email protected]",
pass: "gmail_password"
}
});
var mail = {
from: "Yashwant Chavan <[email protected]>",
to: "[email protected]",
subject: "Send Email Using Node.js",
text: "Node.js New world for me",
html: "<b>Node.js New world for me</b>"
}
smtpTransport.sendMail(mail, function(error, response){
if(error){
console.log(error);
}else{
console.log("Message sent: " + response.message);
}
smtpTransport.close();
});
To quickly resolve this, use this very helpful shortcut in Android Studio:
Right-click widget-in-question > Constraint Layout > Infer Constraints:
Thereafter, you can tweak the constraints as described here: https://stackoverflow.com/a/37960888/5556250
Update
This is not correct for the Android Studio v3 and up. As per @purpleladydragons's comment:
"Constraint Layout" is not in the dropdown menu. Use the magic wand icon in the toolbar menu above the design preview; there is the "Infer Constraints" button.
You have several options for iterating over a dictionary.
If you iterate over the dictionary itself (for team in league
), you will be iterating over the keys of the dictionary. When looping with a for loop, the behavior will be the same whether you loop over the dict (league
) itself, or league.keys()
:
for team in league.keys():
runs_scored, runs_allowed = map(float, league[team])
You can also iterate over both the keys and the values at once by iterating over league.items()
:
for team, runs in league.items():
runs_scored, runs_allowed = map(float, runs)
You can even perform your tuple unpacking while iterating:
for team, (runs_scored, runs_allowed) in league.items():
runs_scored = float(runs_scored)
runs_allowed = float(runs_allowed)
Realizing that "applying" "nlargest" to groupby object works just as fine:
Additional advantage - also can fetch top n values if required:
In [85]: import pandas as pd
In [86]: df = pd.DataFrame({
...: 'sp' : ['MM1', 'MM1', 'MM1', 'MM2', 'MM2', 'MM2', 'MM4', 'MM4','MM4'],
...: 'mt' : ['S1', 'S1', 'S3', 'S3', 'S4', 'S4', 'S2', 'S2', 'S2'],
...: 'val' : ['a', 'n', 'cb', 'mk', 'bg', 'dgb', 'rd', 'cb', 'uyi'],
...: 'count' : [3,2,5,8,10,1,2,2,7]
...: })
## Apply nlargest(1) to find the max val df, and nlargest(n) gives top n values for df:
In [87]: df.groupby(["sp", "mt"]).apply(lambda x: x.nlargest(1, "count")).reset_index(drop=True)
Out[87]:
count mt sp val
0 3 S1 MM1 a
1 5 S3 MM1 cb
2 8 S3 MM2 mk
3 10 S4 MM2 bg
4 7 S2 MM4 uyi
cast(str_column as int)
Taken from this answer.
packages.config
file. This is the first time I see ignoring a problem actually makes it go away...
Edit in 2020: if you are viewing this warning, consider upgrading to PackageReference if you can
Try this:
$(document).on('click','#save',function(e) {
var data = $("#form-search").serialize();
$.ajax({
data: data,
type: "post",
url: "insertmail.php",
success: function(data){
alert("Data Save: " + data);
}
});
});
and in insertmail.php:
<?php
if(isset($_REQUEST))
{
mysql_connect("localhost","root","");
mysql_select_db("eciticket_db");
error_reporting(E_ALL && ~E_NOTICE);
$email=$_POST['email'];
$sql="INSERT INTO newsletter_email(email) VALUES ('$email')";
$result=mysql_query($sql);
if($result){
echo "You have been successfully subscribed.";
}
}
?>
Don't use mysql_
it's deprecated.
another method:
Actually if your problem is null value inserted into the database then try this and here no need of ajax.
<?php
if($_POST['email']!="")
{
mysql_connect("localhost","root","");
mysql_select_db("eciticket_db");
error_reporting(E_ALL && ~E_NOTICE);
$email=$_POST['email'];
$sql="INSERT INTO newsletter_email(email) VALUES ('$email')";
$result=mysql_query($sql);
if($result){
//echo "You have been successfully subscribed.";
setcookie("msg","You have been successfully subscribed.",time()+5,"/");
header("location:yourphppage.php");
}
if(!$sql)
die(mysql_error());
mysql_close();
}
?>
<?php if(isset($_COOKIE['msg'])){?>
<span><?php echo $_COOKIE['msg'];setcookie("msg","",time()-5,"/");?></span>
<?php }?>
<form id="form-search" method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
<span><span class="style2">Enter you email here</span>:</span>
<input name="email" type="email" id="email" required/>
<input type="submit" value="subscribe" class="submit"/>
</form>
this did it for me. you can vary the options for the output format to Base64.Default whatsoever.
// encode base64 from image
ByteArrayOutputStream baos = new ByteArrayOutputStream();
imageBitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] b = baos.toByteArray();
encodedString = Base64.encodeToString(b, Base64.URL_SAFE | Base64.NO_WRAP);
I stumbled on this post looking for a nice way to keep my header/navigation bar centered and responsive to size changes.
//CSS
.nav-container {
height: 60px; /*The static height*/
width: 100%; /*Makes it responsive to resizing the browser*/
position: fixed; /*So that it will always be in the center*/
}
//jQuery
$(window).scroll(() => {
if ($(document).scrollTop() < 60) {
$('.nav-container').css('top', $(document).scrollTop() * -1)
}
})
As we scroll, the bar moves upwards off the screen. If you scroll left/right it will stay fixed.
public void display(){
String x[]=new String [5];
for(int i = 4 ; i > = 0 ; i-- ){//runs backwards
//i is the nums running backwards therefore its printing from
//highest element to the lowest(ie the back of the array to the front) as i decrements
System.out.println(x[i]);
}
}
You can consider using jQuery. With jQuery it's super-easy and might look like this:
$('#mytab1 tr').each(function(){
$(this).find('td').each(function(){
//do your stuff, you can use $(this) to get current cell
})
})
This work for me in bootstrap 4:
<div class="alert alert-info">
<a href="#" class="alert-link">Summary:Its some description.......testtesttest</a>
<button type="button" class="btn btn-primary btn-lg float-right">Large button</button>
</div>
I get the same error when I specify my HTTPS URL as : https://www.mywebsite.com . However it works fine when I specify it without the three W's as : https://mywebsite.com .
I've had a LOT of trouble with pretty photo and IE9. I also had issues with fancybox in IE.
For youtube.com, I'm having a lot of luck with CeeBox.
http://catcubed.com/2008/12/23/ceebox-a-thickboxvideobox-mashup/
This should be equivalent to your current code, only a lot faster:
output <- matrix(unlist(z), ncol = 10, byrow = TRUE)
You have a line break <br>
in-between the second and third images in your markup. Get rid of that, and it'll show inline.
You can remove "JavaAppletPlugin.plugin" found in Spotlight or Finder, then re-install downloaded Java 8.
This will simply solve your problem.
The previous answers were in the right track, but the complete answer for this is going to Disabling rules only for a group of files, there you'll find the documentation needed to disable/enable rules for certain folders (Because in some cases you don't want to ignore the whole thing, only disable certain rules). Example:
{
"env": {},
"extends": [],
"parser": "",
"plugins": [],
"rules": {},
"overrides": [
{
"files": ["test/*.spec.js"], // Or *.test.js
"rules": {
"require-jsdoc": "off"
}
}
],
"settings": {}
}
var data = $('<div>').html('[{"Id":1,"Name":"Name}]')[0].textContent;
that should parse all the encoded values you need.
Laravel has inbuilt support for multiple database systems, you need to provide connection details in config/database.php file
return [
'default' => env('DB_CONNECTION', 'mysql'),
'connections' => [
'mysql' => [
'driver' => 'mysql',
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
'strict' => false,
'engine' => null,
],
'mysqlOne' => [
'driver' => 'mysql',
'host' => env('DB_HOST_ONE', '127.0.0.1'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE_ONE', 'forge'),
'username' => env('DB_USERNAME_ONE', 'forge'),
'password' => env('DB_PASSWORD_ONE', ''),
'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
'prefix' => '',
'strict' => false,
'engine' => null,
],
];
Once you have this you can create two base model class for each connection and define the connection name in those models
//BaseModel.php
protected $connection = 'mysql';
//BaseModelOne.php
protected $connection = 'mysqlOne';
You can extend these models to create more models for tables in each DB.
I tested a simple solution that works for me! My javascript was in a js separate file. What I did is that I placed the javascript for the new element into the html that was loaded with ajax, and it works fine for me! This is for those having big files of javascript!!
I got here searching for the same error, but from Node.js native driver. The answer for me was combination of answers by campeterson and Prabhat.
The issue is that readPreference
setting defaults to primary
, which then somehow leads to the confusing slaveOk
error. My problem is that I just wan to read from my replica set from any node. I don't even connect to it as to replicaset. I just connect to any node to read from it.
Setting readPreference
to primaryPreferred
(or better to the ReadPreference.PRIMARY_PREFERRED
constant) solved it for me. Just pass it as an option to MongoClient.connect()
or to client.db()
or to any find()
, aggregate()
or other function.
const { MongoClient, ReadPreference } = require('mongodb');
const client = await MongoClient.connect(MONGODB_CONNECTIONSTRING, { readPreference: ReadPreference.PRIMARY_PREFERRED });
All the WITH RECOVERY based options did not work for me.
What did was to do the complete restore from Management Studio.
USE [master]
RESTORE DATABASE Sales_SSD
FROM DISK = N'D:\databaseBackups02\Daily_Sales_20150309_0941.bak'
WITH FILE = 1,
MOVE N'Sales_Data' TO N'C:\Data\SSD\Sales.mdf',
MOVE N'Sales_Log' TO N'C:\Data\SSD\Sales_1.ldf',
NOUNLOAD, REPLACE, STATS = 5
As you mentioned, prompt
works for browsers all the way back to IE:
var answer = prompt('question', 'defaultAnswer');
For Node.js > v7.6, you can use console-read-write
, which is a wrapper around the low-level readline
module:
const io = require('console-read-write');
async function main() {
// Simple readline scenario
io.write('I will echo whatever you write!');
io.write(await io.read());
// Simple question scenario
io.write(`hello ${await io.ask('Who are you?')}!`);
// Since you are not blocking the IO, you can go wild with while loops!
let saidHi = false;
while (!saidHi) {
io.write('Say hi or I will repeat...');
saidHi = await io.read() === 'hi';
}
io.write('Thanks! Now you may leave.');
}
main();
// I will echo whatever you write!
// > ok
// ok
// Who are you? someone
// hello someone!
// Say hi or I will repeat...
// > no
// Say hi or I will repeat...
// > ok
// Say hi or I will repeat...
// > hi
// Thanks! Now you may leave.
Disclosure I'm author and maintainer of console-read-write
For SpiderMonkey, simple readline
as suggested by @MooGoo and @Zaz.
You can use 2 methods:
<div [ngStyle]="{'background-image': 'url("' + photo + '")'}"></div>
<div [style.background-image]="'url("' + photo + '")'"></div>
Note: it is important to surround the URL with " char.
You could do this
$("#input").blur(function(){
if($(this).val() == ''){
alert('empty');
}
});
http://jsfiddle.net/jasongennaro/Y5P9k/1/
When the input has lost focus
that is .blur()
, then check the value of the #input
.
If it is empty == ''
then trigger the alert.
ok to resolve this First install dns for python by cmd using pip install dnspython
(if you use conda first type activate
and then you will go in base (in cmd) and then type above code)
it will install it in anaconda site package ,copy the location of that site package folder from cmd, and open it . Now copy all dns folders and paste them in python site package folder. it will resolve it .
actually the thing is our code is not able to find the specified package in python\site package bcz it is in anaconda\site package. so you have to COPY IT (not cut).
I had the same problem. The solution turned out to be much simpler. It appears that a datatable wants the method in the form of a getter, ie getSomeMethod(), not just someMethod(). In my case in the datatable I was calling findResults. I changed the method in my backing bean to getFindResults() and it worked.
A commandButton worked find without the get which served to make it only more confusing.
Use DateTime with DateTime::format()
$datetime = new DateTime($dateTimeString);
echo $datetime->format('w');
This trick worked for me (for min-sdk >= 18).
I used android:includeFontPadding="false"
and a negative margin like android:layout_marginTop="-11dp"
and put my TextView
inside a FrameLayout
( or any ViewGroup...)
and finally sample codes:
<LinearLayout
android:layout_width="60dp"
android:layout_height="wrap_content"
>
<TextView
style="@style/MyTextViews.Bold"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/yellow"
android:textSize="48sp"
android:layout_marginTop="-11dp"
android:includeFontPadding="false"
tools:text="1"/>
</LinearLayout>
If you can update your connector to a version, which supports the new authentication plugin of MySQL 8, then do that. If that is not an option for some reason, change the default authentication method of your database user to native.
tmux limits the dimensions of a window to the smallest of each dimension across all the sessions to which the window is attached. If it did not do this there would be no sensible way to display the whole window area for all the attached clients.
The easiest thing to do is to detach any other clients from the sessions when you attach:
tmux attach -d
Alternately, you can move any other clients to a different session before attaching to the session:
takeover() {
# create a temporary session that displays the "how to go back" message
tmp='takeover temp session'
if ! tmux has-session -t "$tmp"; then
tmux new-session -d -s "$tmp"
tmux set-option -t "$tmp" set-remain-on-exit on
tmux new-window -kt "$tmp":0 \
'echo "Use Prefix + L (i.e. ^B L) to return to session."'
fi
# switch any clients attached to the target session to the temp session
session="$1"
for client in $(tmux list-clients -t "$session" | cut -f 1 -d :); do
tmux switch-client -c "$client" -t "$tmp"
done
# attach to the target session
tmux attach -t "$session"
}
takeover 'original session' # or the session number if you do not name sessions
The screen will shrink again if a smaller client switches to the session.
There is also a variation where you only "take over" the window (link the window into a new session, set aggressive-resize
, and switch any other sessions that have that window active to some other window), but it is harder to script in the general case (and different to “exit” since you would want to unlink the window or kill the session instead of just detaching from the session).
The latest (as of Jan 2019) stand-alone MSBuild installers can be found here: https://www.visualstudio.com/downloads/
Scroll down to "Tools for Visual Studio 2019" and choose "Build Tools for Visual Studio 2019" (despite the name, it's for users who don't want the full IDE)
See this question for additional information.
In my opinion, to answer this question, you need to think in terms of project life cycle and version control. In other words, does the parent pom have its own life cycle i.e. can it be released separately of the other modules or not?
If the answer is yes (and this is the case of most projects that have been mentioned in the question or in comments), then the parent pom needs his own module from a VCS and from a Maven point of view and you'll end up with something like this at the VCS level:
root
|-- parent-pom
| |-- branches
| |-- tags
| `-- trunk
| `-- pom.xml
`-- projectA
|-- branches
|-- tags
`-- trunk
|-- module1
| `-- pom.xml
|-- moduleN
| `-- pom.xml
`-- pom.xml
This makes the checkout a bit painful and a common way to deal with that is to use svn:externals
. For example, add a trunks
directory:
root
|-- parent-pom
| |-- branches
| |-- tags
| `-- trunk
| `-- pom.xml
|-- projectA
| |-- branches
| |-- tags
| `-- trunk
| |-- module1
| | `-- pom.xml
| |-- moduleN
| | `-- pom.xml
| `-- pom.xml
`-- trunks
With the following externals definition:
parent-pom http://host/svn/parent-pom/trunk
projectA http://host/svn/projectA/trunk
A checkout of trunks
would then result in the following local structure (pattern #2):
root/
parent-pom/
pom.xml
projectA/
Optionally, you can even add a pom.xml
in the trunks
directory:
root
|-- parent-pom
| |-- branches
| |-- tags
| `-- trunk
| `-- pom.xml
|-- projectA
| |-- branches
| |-- tags
| `-- trunk
| |-- module1
| | `-- pom.xml
| |-- moduleN
| | `-- pom.xml
| `-- pom.xml
`-- trunks
`-- pom.xml
This pom.xml
is a kind of "fake" pom: it is never released, it doesn't contain a real version since this file is never released, it only contains a list of modules. With this file, a checkout would result in this structure (pattern #3):
root/
parent-pom/
pom.xml
projectA/
pom.xml
This "hack" allows to launch of a reactor build from the root after a checkout and make things even more handy. Actually, this is how I like to setup maven projects and a VCS repository for large builds: it just works, it scales well, it gives all the flexibility you may need.
If the answer is no (back to the initial question), then I think you can live with pattern #1 (do the simplest thing that could possibly work).
Now, about the bonus questions:
- Where is the best place to define the various shared configuration as in source control, deployment directories, common plugins etc. (I'm assuming the parent but I've often been bitten by this and they've ended up in each project rather than a common one).
Honestly, I don't know how to not give a general answer here (like "use the level at which you think it makes sense to mutualize things"). And anyway, child poms can always override inherited settings.
- How do the maven-release plugin, hudson and nexus deal with how you set up your multi-projects (possibly a giant question, it's more if anyone has been caught out when by how a multi-project build has been set up)?
The setup I use works well, nothing particular to mention.
Actually, I wonder how the maven-release-plugin deals with pattern #1 (especially with the <parent>
section since you can't have SNAPSHOT dependencies at release time). This sounds like a chicken or egg problem but I just can't remember if it works and was too lazy to test it.
I've approached this in a different way. I've created a function which simply returns true or false.. Usage:
If FieldContains("A;B;C",MyFieldVariable,True|False) then
.. Do Something
End If
Public Function FieldContains(Searchfor As String, SearchField As String, AllowNulls As Boolean) As Boolean
If AllowNulls And Len(SearchField) = 0 Then Return True
For Each strSearchFor As String In Searchfor.Split(";")
If UCase(SearchField) = UCase(strSearchFor) Then
Return True
End If
Next
Return False
End Function
Yocoder is right,
Inside the DataTemplate
, your DataContext
is set to the Rule
its currently handling..
To access the parents DataContext
, you can also consider using a RelativeSource
in your binding:
<TextBlock Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ____Your Parent control here___ }}, Path=DataContext.SelectedRule.Name}" />
More info on RelativeSource
can be found here:
http://msdn.microsoft.com/en-us/library/system.windows.data.relativesource.aspx
@andresh For me locationChangeSuccess worked instead of routeChangeSuccess.
//Go back to the previous stage with this back() call
var history = [];
$rootScope.$on('$locationChangeSuccess', function() {
history.push($location.$$path);
});
$rootScope.back = function () {
var prevUrl = history.length > 1 ? history.splice(-2)[0] : "/";
$location.path(prevUrl);
history = []; //Delete history array after going back
};
I had the same issue, but I was running Ubuntu 12.04 through a VM. I am using a Nexus 10. I had added the usb device as a filter for the VM (using virtual box in the virtual machine's settings).
The device I had added was "samsung Nexus 10".
The problem is that once the device is in fastboot mode, it shows up as a different device: "Google, Inc Android 1.0." So doing "lsusb" in the VM showed no device connected, and obviously "fastboot devices" returned nothing until I added the "second" device as a filter for the VM as well.
Hope this helps someone.
Try this this will find all your files recursively:
import glob, os
os.chdir("H:\\wallpaper")# use whatever directory you want
#double\\ no single \
for file in glob.glob("**/*.txt", recursive = True):
print(file)
here you go
var str = "['abc',['def','ghi'],'jkl']";
//'[\'abc\',[\'def\',\'ghi\'],\'jkl\']'
str.replace(/[\[\]']/g,'' );
//'abc,def,ghi,jkl'
You could fill the dependend cell (D2) by a User Defined Function (VBA Macro Function) that takes the value of the C2-Cell as input parameter, returning the current date as ouput.
Having C2 as input parameter for the UDF in D2 tells Excel that it needs to reevaluate D2 everytime C2 changes (that is if auto-calculation of formulas is turned on for the workbook).
EDIT:
Here is some code:
For the UDF:
Public Function UDF_Date(ByVal data) As Date
UDF_Date = Now()
End Function
As Formula in D2:
=UDF_Date(C2)
You will have to give the D2-Cell a Date-Time Format, or it will show a numeric representation of the date-value.
And you can expand the formula over the desired range by draging it if you keep the C2 reference in the D2-formula relative.
Note: This still might not be the ideal solution because every time Excel recalculates the workbook the date in D2 will be reset to the current value. To make D2 only reflect the last time C2 was changed there would have to be some kind of tracking of the past value(s) of C2. This could for example be implemented in the UDF by providing also the address alonside the value of the input parameter, storing the input parameters in a hidden sheet, and comparing them with the previous values everytime the UDF gets called.
Addendum:
Here is a sample implementation of an UDF that tracks the changes of the cell values and returns the date-time when the last changes was detected. When using it, please be aware that:
The usage of the UDF is the same as described above.
The UDF works only for single cell input ranges.
The cell values are tracked by storing the last value of cell and the date-time when the change was detected in the document properties of the workbook. If the formula is used over large datasets the size of the file might increase considerably as for every cell that is tracked by the formula the storage requirements increase (last value of cell + date of last change.) Also, maybe Excel is not capable of handling very large amounts of document properties and the code might brake at a certain point.
If the name of a worksheet is changed all the tracking information of the therein contained cells is lost.
The code might brake for cell-values for which conversion to string is non-deterministic.
The code below is not tested and should be regarded only as proof of concept. Use it at your own risk.
Public Function UDF_Date(ByVal inData As Range) As Date
Dim wb As Workbook
Dim dProps As DocumentProperties
Dim pValue As DocumentProperty
Dim pDate As DocumentProperty
Dim sName As String
Dim sNameDate As String
Dim bDate As Boolean
Dim bValue As Boolean
Dim bChanged As Boolean
bDate = True
bValue = True
bChanged = False
Dim sVal As String
Dim dDate As Date
sName = inData.Address & "_" & inData.Worksheet.Name
sNameDate = sName & "_dat"
sVal = CStr(inData.Value)
dDate = Now()
Set wb = inData.Worksheet.Parent
Set dProps = wb.CustomDocumentProperties
On Error Resume Next
Set pValue = dProps.Item(sName)
If Err.Number <> 0 Then
bValue = False
Err.Clear
End If
On Error GoTo 0
If Not bValue Then
bChanged = True
Set pValue = dProps.Add(sName, False, msoPropertyTypeString, sVal)
Else
bChanged = pValue.Value <> sVal
If bChanged Then
pValue.Value = sVal
End If
End If
On Error Resume Next
Set pDate = dProps.Item(sNameDate)
If Err.Number <> 0 Then
bDate = False
Err.Clear
End If
On Error GoTo 0
If Not bDate Then
Set pDate = dProps.Add(sNameDate, False, msoPropertyTypeDate, dDate)
End If
If bChanged Then
pDate.Value = dDate
Else
dDate = pDate.Value
End If
UDF_Date = dDate
End Function
Make the insertion of the date conditional upon the range.
This has an advantage of not changing the dates unless the content of the cell is changed, and it is in the range C2:C2, even if the sheet is closed and saved, it doesn't recalculate unless the adjacent cell changes.
Adapted from this tip and @Paul S answer
Private Sub Worksheet_Change(ByVal Target As Range)
Dim R1 As Range
Dim R2 As Range
Dim InRange As Boolean
Set R1 = Range(Target.Address)
Set R2 = Range("C2:C20")
Set InterSectRange = Application.Intersect(R1, R2)
InRange = Not InterSectRange Is Nothing
Set InterSectRange = Nothing
If InRange = True Then
R1.Offset(0, 1).Value = Now()
End If
Set R1 = Nothing
Set R2 = Nothing
End Sub
As of PHP 7.1,
catch( AError | BError $e )
{
handler1( $e )
}
interestingly, you can also:
catch( AError | BError $e )
{
handler1( $e )
} catch (CError $e){
handler2($e);
} catch(Exception $e){
handler3($e);
}
and in earlier versions of PHP:
catch(Exception $ex){
if($ex instanceof AError){
//handle a AError
} elseif($ex instanceof BError){
//handle a BError
} else {
throw $ex;//an unknown exception occured, throw it further
}
}
$('#district').css({opacity: 0});
$('#district').animate({opacity: 1}, 700 );
You can create an array with all elements from a given Swift
Set
simply with
let array = Array(someSet)
This works because Set
conforms to the SequenceType
protocol
and an Array
can be initialized with a sequence. Example:
let mySet = Set(["a", "b", "a"]) // Set<String>
let myArray = Array(mySet) // Array<String>
print(myArray) // [b, a]
Even better:
DataTable DTable = new DataTable();
BindingSource SBind = new BindingSource();
SBind.DataSource = DTable;
DataGridView ServersTable = new DataGridView();
ServersTable.AutoGenerateColumns = false;
ServersTable.DataSource = DTable;
ServersTable.DataSource = SBind;
ServersTable.Refresh();
You're telling the bindable source that it's bound to the DataTable, in-turn you need to tell your DataGridView not to auto-generate columns, so it will only pull the data in for the columns you've manually input into the control... lastly refresh the control to update the databind.
The substring starts at, and includes the character at the location of the first number given and goes to, but does not include the character at the last number given.
If you are trying to find a View
from your Fragment
then try doing it like this:
int w = ((EditText)getActivity().findViewById(R.id.editText1)).getLayoutParams().width;
pg_basebackup
seems to be the better way of doing this now, especially for large databases.
You can copy a database from a server with the same or older major version. Or more precisely:
pg_basebackup
works with servers of the same or an older major version, down to 9.1. However, WAL streaming mode (-X stream
) only works with server version 9.3 and later, and tar format mode (--format=tar
) of the current version only works with server version 9.5 or later.
For that you need on the source server:
listen_addresses = '*'
to be able to connect from the target server. Make sure port 5432 is open for that matter.max_wal_senders = 1
(-X fetch
), 2
for -X stream
(the default in case of PostgreSQL 12), or more.wal_level = replica
or higher to be able to set max_wal_senders > 0
.host replication postgres DST_IP/32 trust
in pg_hba.conf
. This grants access to the pg
cluster to anyone from the DST_IP
machine. You might want to resort to a more secure option.Changes 1, 2, 3 require server restart, change 4 requires reload.
On the target server:
# systemctl stop postgresql@VERSION-NAME
postgres$ pg_basebackup -h SRC_IP -U postgres -D VERSION/NAME --progress
# systemctl start postgresql@VERSION-NAME
This is best plugin with proper documentation and examples
Plus point: you can ask for help in its discussion forum and you will get response within a day from the author itself, really impressive.
Most recent answer (for Angular 8+):
this.http.post("your-url",params,{responseType:'arraybuffer' as 'json'}).subscribe(
(res) => {
this.showpdf(res);
}
)};
public Content:SafeResourceUrl;
showpdf(response:ArrayBuffer) {
var file = new Blob([response], {type: 'application/pdf'});
var fileURL = URL.createObjectURL(file);
this.Content = this.sanitizer.bypassSecurityTrustResourceUrl(fileURL);
}
HTML :
<embed [src]="Content" style="width:200px;height:200px;" type="application/pdf" />
You can create a .timer
systemd unit file to control the execution of your .service
unit file.
So for example, to wait for 1 minute after boot-up before starting your foo.service
, create a foo.timer
file in the same directory with the contents:
[Timer]
OnBootSec=1min
It is important that the service is disabled (so it doesn't start at boot), and the timer enabled, for all this to work (thanks to user tride for this):
systemctl disable foo.service
systemctl enable foo.timer
You can find quite a few more options and all information needed here: https://wiki.archlinux.org/index.php/Systemd/Timers
Another option is to create an extra wrapper to center the element vertically.
#container{_x000D_
border:solid 1px #33aaff;_x000D_
width:200px;_x000D_
height:200px;_x000D_
}_x000D_
_x000D_
#helper{_x000D_
position:relative;_x000D_
height:50px;_x000D_
top:50%;_x000D_
border:dotted 1px #ff55aa;_x000D_
}_x000D_
_x000D_
#centered{_x000D_
position:relative;_x000D_
height:50px;_x000D_
top:-50%;_x000D_
border:solid 1px #ff55aa;_x000D_
}
_x000D_
<div id="container">_x000D_
<div id="helper">_x000D_
<div id="centered"></div>_x000D_
</div>_x000D_
<div>
_x000D_
Sometimes all you have to do to make sure the cursor is inside the text box is: click on the text box and when a menu is displayed, click on "Format text box" then click on the "text box" tab and finally modify all four margins (left, right, upper and bottom) by arrowing down until "0" appear on each margin.
Rather than querying the DOM for elements (which isn't very angular see "Thinking in AngularJS" if I have a jQuery background?) you should perform your DOM manipulation within your directive. The element is available to you in your link function.
So in your myDirective
return {
link: function (scope, element, attr) {
element.html('Hello world');
}
}
If you must perform the query outside of the directive then it would be possible to use querySelectorAll in modern browers
angular.element(document.querySelectorAll("[my-directive]"));
however you would need to use jquery to support IE8 and backwards
angular.element($("[my-directive]"));
or write your own method as demonstrated here Get elements by attribute when querySelectorAll is not available without using libraries?
There's a new way to do this coming in Python 3.4:
from contextlib import suppress
with suppress(Exception):
# your code
Here's the commit that added it: http://hg.python.org/cpython/rev/406b47c64480
And here's the author, Raymond Hettinger, talking about this and all sorts of other Python hotness (relevant bit at 43:30): http://www.youtube.com/watch?v=OSGv2VnC0go
If you wanted to emulate the bare except
keyword and also ignore things like KeyboardInterrupt
—though you usually don't—you could use with suppress(BaseException)
.
Edit: Looks like ignored
was renamed to suppress
before the 3.4 release.
Personally I like the navigationDrawer
in Google Drive official app. It just works and works great. I agree that the navigation drawer shouldn't move the action bar because is the key point to open and close the navigation drawer.
If you are still trying to get that behavior I recently create a project Called SherlockNavigationDrawer
and as you may expect is the implementation of the Navigation Drawer with ActionBarSherlock
and works for pre Honeycomb devices. Check it:
In my sample code, I was setting my object
to nothing, and I couldn't get the "not" part of the if statement to work with the object. I tried if My_Object is not nothing
and also if not My_Object is nothing
. It may be just a syntax thing I can't figure out but I didn't have time to mess around, so I did a little workaround like this:
if My_Object is Nothing Then
'do nothing
Else
'Do something
End if
sudo apt-get install python3-pymysql
This command also works for me to install the package required for Flask app to tun on ubuntu 16x with WISG module on APACHE2 server.
BY default on WSGI uses python 3 installation of UBUNTU.
Anaconda custom installation won't work.