Use DecimalFormat
double answer = 5.0;
DecimalFormat df = new DecimalFormat("###.#");
System.out.println(df.format(answer));
const input = '0093';
const match = input.match(/^(0+)(\d+)$/);
const result = match && match[2] || input;
You can try this:
: ${depth?"Error Message"} ## when your depth variable is not even declared or is unset.
NOTE: Here it's just ?
after depth
.
or
: ${depth:?"Error Message"} ## when your depth variable is declared but is null like: "depth=".
NOTE: Here it's :?
after depth
.
Here if the variable depth
is found null
it will print the error message and then exit.
You can use str_pad
for adding 0's
str_pad($month, 2, '0', STR_PAD_LEFT);
string str_pad ( string $input , int $pad_length [, string $pad_string = " " [, int $pad_type = STR_PAD_RIGHT ]] )
There are a few different ways of doing this. I prefer using apply
, since it's easily extendable:
##Generate some data
dd = data.frame(a = 1:4, b= 1:0, c=0:3)
##Go through each row and determine if a value is zero
row_sub = apply(dd, 1, function(row) all(row !=0 ))
##Subset as usual
dd[row_sub,]
If array
is truly an array, then you can "zero it out" with:
memset(array, 0, sizeof array);
But there are two points you should know:
array
is really a "two-d array", i.e., was declared T array[M][N];
for some type T
.array
was declared. If you pass it to a function, then the name array
decays to a pointer, and sizeof
will not give you the size of the array.Let's do an experiment:
#include <stdio.h>
void f(int (*arr)[5])
{
printf("f: sizeof arr: %zu\n", sizeof arr);
printf("f: sizeof arr[0]: %zu\n", sizeof arr[0]);
printf("f: sizeof arr[0][0]: %zu\n", sizeof arr[0][0]);
}
int main(void)
{
int arr[10][5];
printf("main: sizeof arr: %zu\n", sizeof arr);
printf("main: sizeof arr[0]: %zu\n", sizeof arr[0]);
printf("main: sizeof arr[0][0]: %zu\n\n", sizeof arr[0][0]);
f(arr);
return 0;
}
On my machine, the above prints:
main: sizeof arr: 200
main: sizeof arr[0]: 20
main: sizeof arr[0][0]: 4
f: sizeof arr: 8
f: sizeof arr[0]: 20
f: sizeof arr[0][0]: 4
Even though arr
is an array, it decays to a pointer to its first element when passed to f()
, and therefore the sizes printed in f()
are "wrong". Also, in f()
the size of arr[0]
is the size of the array arr[0]
, which is an "array [5] of int
". It is not the size of an int *
, because the "decaying" only happens at the first level, and that is why we need to declare f()
as taking a pointer to an array of the correct size.
So, as I said, what you were doing originally will work only if the two conditions above are satisfied. If not, you will need to do what others have said:
memset(array, 0, m*n*sizeof array[0][0]);
Finally, memset()
and the for
loop you posted are not equivalent in the strict sense. There could be (and have been) compilers where "all bits zero" does not equal zero for certain types, such as pointers and floating-point values. I doubt that you need to worry about that though.
class Item{
bool IsNullOrZero{ get{return ((this.Rate ?? 0) == 0);}}
}
This isn't a very beautiful answer, but it's what I use to create zero-length vectors:
0[-1] # numeric
""[-1] # character
TRUE[-1] # logical
0L[-1] # integer
A literal is a vector of length 1, and [-1]
removes the first element (the only element in this case) from the vector, leaving a vector with zero elements.
As a bonus, if you want a single NA
of the respective type:
0[NA] # numeric
""[NA] # character
TRUE[NA] # logical
0L[NA] # integer
Once I've seen such an interesting construction:
<Ids xmlns:id="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<id:int>1787</id:int>
</Ids>
This can be achieved assigning weight
to every button added inside the container, very important to define horizontal orientation :
int buttons = 5;
RadioGroup rgp = (RadioGroup) findViewById(R.id.radio_group);
rgp.setOrientation(LinearLayout.HORIZONTAL);
for (int i = 1; i <= buttons; i++) {
RadioButton rbn = new RadioButton(this);
rbn.setId(1 + 1000);
rbn.setText("RadioButton" + i);
//Adding weight
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, 1f);
rbn.setLayoutParams(params);
rgp.addView(rbn);
}
so we can get this in our device as a result:
even if we rotate our device the weight
defined in each button can distribuite the elemenents uniformally along the container:
This error means that the MVC framework can't find a value for your id
property that you pass as an argument to the Edit
method.
MVC searches for these values in places like your route data, query string and form values.
For example the following will pass the id
property in your query string:
/Edit?id=1
A nicer way would be to edit your routing configuration so you can pass this value as a part of the URL itself:
/Edit/1
This process where MVC searches for values for your parameters is called Model Binding and it's one of the best features of MVC. You can find more information on Model Binding here.
Python accepts both " and ' as quote marks, so you could do this as:
>>> print '"A word that needs quotation marks"'
"A word that needs quotation marks"
Alternatively, just escape the inner "s
>>> print "\"A word that needs quotation marks\""
"A word that needs quotation marks"
Yes, a table have one or many foreign keys and each foreign keys hava a different parent table.
I'll try to provide a comprehensive answer here. Much of the points appear in other answers, but I found each answer incomplete, and some incorrect.
First and foremost, objectForKey:
is an NSDictionary
method, while valueForKey:
is a KVC protocol method required of any KVC complaint class - including NSDictionary.
Furthermore, as @dreamlax wrote, documentation hints that NSDictionary
implements its valueForKey:
method USING its objectForKey:
implementation. In other words - [NSDictionary valueForKey:]
calls on [NSDictionary objectForKey:]
.
This implies, that valueForKey:
can never be faster than objectForKey:
(on the same input key) although thorough testing I've done imply about 5% to 15% difference, over billions of random access to a huge NSDictionary. In normal situations - the difference is negligible.
Next: KVC protocol only works with NSString *
keys, hence valueForKey:
will only accept an NSString *
(or subclass) as key, whilst NSDictionary
can work with other kinds of objects as keys - so that the "lower level" objectForKey:
accepts any copy-able (NSCopying protocol compliant) object as key.
Last, NSDictionary's
implementation of valueForKey:
deviates from the standard behavior defined in KVC's documentation, and will NOT emit a NSUnknownKeyException
for a key it can't find - unless this is a "special" key - one that begins with '@' - which usually means an "aggregation" function key (e.g. @"@sum, @"@avg"
). Instead, it will simply return a nil when a key is not found in the NSDictionary - behaving the same as objectForKey:
Following is some test code to demonstrate and prove my notes.
- (void) dictionaryAccess {
NSLog(@"Value for Z:%@", [@{@"X":@(10), @"Y":@(20)} valueForKey:@"Z"]); // prints "Value for Z:(null)"
uint32_t testItemsCount = 1000000;
// create huge dictionary of numbers
NSMutableDictionary *d = [NSMutableDictionary dictionaryWithCapacity:testItemsCount];
for (long i=0; i<testItemsCount; ++i) {
// make new random key value pair:
NSString *key = [NSString stringWithFormat:@"K_%u",arc4random_uniform(testItemsCount)];
NSNumber *value = @(arc4random_uniform(testItemsCount));
[d setObject:value forKey:key];
}
// create huge set of random keys for testing.
NSMutableArray *keys = [NSMutableArray arrayWithCapacity:testItemsCount];
for (long i=0; i<testItemsCount; ++i) {
NSString *key = [NSString stringWithFormat:@"K_%u",arc4random_uniform(testItemsCount)];
[keys addObject:key];
}
NSDictionary *dict = [d copy];
NSTimeInterval vtotal = 0.0, ototal = 0.0;
NSDate *start;
NSTimeInterval elapsed;
for (int i = 0; i<10; i++) {
start = [NSDate date];
for (NSString *key in keys) {
id value = [dict valueForKey:key];
}
elapsed = [[NSDate date] timeIntervalSinceDate:start];
vtotal+=elapsed;
NSLog (@"reading %lu values off dictionary via valueForKey took: %10.4f seconds", keys.count, elapsed);
start = [NSDate date];
for (NSString *key in keys) {
id obj = [dict objectForKey:key];
}
elapsed = [[NSDate date] timeIntervalSinceDate:start];
ototal+=elapsed;
NSLog (@"reading %lu objects off dictionary via objectForKey took: %10.4f seconds", keys.count, elapsed);
}
NSString *slower = (vtotal > ototal) ? @"valueForKey" : @"objectForKey";
NSString *faster = (vtotal > ototal) ? @"objectForKey" : @"valueForKey";
NSLog (@"%@ takes %3.1f percent longer then %@", slower, 100.0 * ABS(vtotal-ototal) / MAX(ototal,vtotal), faster);
}
This should work without converting to List/Array:
collectionName.stream().reduce((prev, next) -> next).orElse(null)
You can also use the isNaN()
function:
var s = ''
var num = isNaN(parseInt(s)) ? 0 : parseInt(s)
Code below (taken from my blog article - http://todayguesswhat.blogspot.com/2021/01/manually-verifying-rsa-sha-signature-in.html ) is hopefully helpful in understanding what is present in a standard SHA with RSA signature. This should work in standard Oracle JDK and does not require Bouncy Castle libraries. It is using the sun.security classes to process the decrypted signature contents - you could just as easily manually parse.
In the example below, the message digest algorithm is SHA-512 which produces a 64 byte (512-bit) checksum.
SHA-1 would be pretty similar - but producing a 20-byte (160-bit) checksum.
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.MessageDigest;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.util.Arrays;
import javax.crypto.Cipher;
import sun.security.util.DerInputStream;
import sun.security.util.DerValue;
public class RSASignatureVerification
{
public static void main(String[] args) throws Exception
{
KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
generator.initialize(2048);
KeyPair keyPair = generator.generateKeyPair();
PrivateKey privateKey = keyPair.getPrivate();
PublicKey publicKey = keyPair.getPublic();
String data = "hello oracle";
byte[] dataBytes = data.getBytes("UTF8");
Signature signer = Signature.getInstance("SHA512withRSA");
signer.initSign(privateKey);
signer.update(dataBytes);
byte[] signature = signer.sign(); // signature bytes of the signing operation's result.
Signature verifier = Signature.getInstance("SHA512withRSA");
verifier.initVerify(publicKey);
verifier.update(dataBytes);
boolean verified = verifier.verify(signature);
if (verified)
{
System.out.println("Signature verified!");
}
/*
The statement that describes signing to be equivalent to RSA encrypting the
hash of the message using the private key is a greatly simplified view
The decrypted signatures bytes likely convey a structure (ASN.1) encoded
using DER with the hash just one component of the structure.
*/
// lets try decrypt signature and see what is in it ...
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, publicKey);
byte[] decryptedSignatureBytes = cipher.doFinal(signature);
/*
sample value of decrypted signature which was 83 bytes long
30 51 30 0D 06 09 60 86 48 01 65 03 04 02 03 05
00 04 40 51 00 41 75 CA 3B 2B 6B C0 0A 3F 99 E3
6B 7A 01 DC F2 9B 36 E6 0D D4 31 89 53 A3 D9 80
6D AE DD 45 7E 55 45 01 FC C8 73 D2 DD 8D E5 B9
E0 71 57 13 41 D0 CD FF CA 58 01 03 A3 DD 95 A1
C1 EE C8
Taking above sample bytes ...
0x30 means A SEQUENCE - which contains an ordered field of one or more types.
It is encoded into a TLV triplet that begins with a Tag byte of 0x30.
DER uses T,L,V (tag bytes, length bytes, value bytes) format
0x51 is the length = 81 decimal (13 bytes)
the 0x30 (48 decimal) that follows begins a second sequence
https://tools.ietf.org/html/rfc3447#page-43
the DER encoding T of the DigestInfo value is equal to the following for SHA-512
0D 06 09 60 86 48 01 65 03 04 02 03 05 00 04 40 || H
where || is concatenation and H is the hash value.
0x0D is the length = 13 decimal (13 bytes)
0x06 means an OBJECT_ID tag
0x09 means the object id is 9 bytes ...
https://docs.microsoft.com/en-au/windows/win32/seccertenroll/about-object-identifier?redirectedfrom=MSDN
taking 2.16.840.1.101.3.4.2.3 (object id for SHA512 Hash Algorithm)
The first two nodes of the OID are encoded onto a single byte.
The first node is multiplied by the decimal 40 and the result is added to the value of the second node
2 * 40 + 16 = 96 decimal = 60 hex
Node values less than or equal to 127 are encoded on one byte.
1 101 3 4 2 3 corresponds to in hex 01 65 03 04 02 03
Node values greater than or equal to 128 are encoded on multiple bytes.
Bit 7 of the leftmost byte is set to one. Bits 0 through 6 of each byte contains the encoded value.
840 decimal = 348 hex
-> 0000 0011 0100 1000
set bit 7 of the left most byte to 1, ignore bit 7 of the right most byte,
shifting right nibble of leftmost byte to the left by 1 bit
-> 1000 0110 X100 1000 in hex 86 48
05 00 ; NULL (0 Bytes)
04 40 ; OCTET STRING (0x40 Bytes = 64 bytes
SHA512 produces a 512-bit (64-byte) hash value
51 00 41 ... C1 EE C8 is the 64 byte hash value
*/
// parse DER encoded data
DerInputStream derReader = new DerInputStream(decryptedSignatureBytes);
byte[] hashValueFromSignature = null;
// obtain sequence of entities
DerValue[] seq = derReader.getSequence(0);
for (DerValue v : seq)
{
if (v.getTag() == 4)
{
hashValueFromSignature = v.getOctetString(); // SHA-512 checksum extracted from decrypted signature bytes
}
}
MessageDigest md = MessageDigest.getInstance("SHA-512");
md.update(dataBytes);
byte[] hashValueCalculated = md.digest();
boolean manuallyVerified = Arrays.equals(hashValueFromSignature, hashValueCalculated);
if (manuallyVerified)
{
System.out.println("Signature manually verified!");
}
else
{
System.out.println("Signature could NOT be manually verified!");
}
}
}
Oracle's security model is such that when executing dynamic SQL using Execute Immediate (inside the context of a PL/SQL block or procedure), the user does not have privileges to objects or commands that are granted via role membership. Your user likely has "DBA" role or something similar. You must explicitly grant "drop table" permissions to this user. The same would apply if you were trying to select from tables in another schema (such as sys or system) - you would need to grant explicit SELECT privileges on that table to this user.
Both do the same on all browsers, AFAIK. Checked on Chrome and Firefox, both append display:none
to the style
attribute of the element.
I use the stored procedure below to update the defaults on a column.
It automatically removes any prior defaults on the column, before adding the new default.
Examples of usage:
-- Update default to be a date.
exec [dbo].[AlterDefaultForColumn] '[dbo].[TableName]','Column','getdate()';
-- Update default to be a number.
exec [dbo].[AlterDefaultForColumn] '[dbo].[TableName]','Column,'6';
-- Update default to be a string. Note extra quotes, as this is not a function.
exec [dbo].[AlterDefaultForColumn] '[dbo].[TableName]','Column','''MyString''';
Stored procedure:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- Sample function calls:
--exec [dbo].[AlterDefaultForColumn] '[dbo].[TableName]','ColumnName','getdate()';
--exec [dbol].[AlterDefaultForColumn] '[dbo].[TableName]','Column,'6';
--exec [dbo].[AlterDefaultForColumn] '[dbo].[TableName]','Column','''MyString''';
create PROCEDURE [dbo].[ColumnDefaultUpdate]
(
-- Table name, including schema, e.g. '[dbo].[TableName]'
@TABLE_NAME VARCHAR(100),
-- Column name, e.g. 'ColumnName'.
@COLUMN_NAME VARCHAR(100),
-- New default, e.g. '''MyDefault''' or 'getdate()'
-- Note that if you want to set it to a string constant, the contents
-- must be surrounded by extra quotes, e.g. '''MyConstant''' not 'MyConstant'
@NEW_DEFAULT VARCHAR(100)
)
AS
BEGIN
-- Trim angle brackets so things work even if they are included.
set @COLUMN_NAME = REPLACE(@COLUMN_NAME, '[', '')
set @COLUMN_NAME = REPLACE(@COLUMN_NAME, ']', '')
print 'Table name: ' + @TABLE_NAME;
print 'Column name: ' + @COLUMN_NAME;
DECLARE @ObjectName NVARCHAR(100)
SELECT @ObjectName = OBJECT_NAME([default_object_id]) FROM SYS.COLUMNS
WHERE [object_id] = OBJECT_ID(@TABLE_NAME) AND [name] = @COLUMN_NAME;
IF @ObjectName <> ''
begin
print 'Removed default: ' + @ObjectName;
--print('ALTER TABLE ' + @TABLE_NAME + ' DROP CONSTRAINT ' + @ObjectName)
EXEC('ALTER TABLE ' + @TABLE_NAME + ' DROP CONSTRAINT ' + @ObjectName)
end
EXEC('ALTER TABLE ' + @TABLE_NAME + ' ADD DEFAULT (' + @NEW_DEFAULT + ') FOR ' + @COLUMN_NAME)
--print('ALTER TABLE ' + @TABLE_NAME + ' ADD DEFAULT (' + @NEW_DEFAULT + ') FOR ' + @COLUMN_NAME)
print 'Added default of: ' + @NEW_DEFAULT;
END
Errors this stored procedure eliminates
If you attempt to add a default to a column when one already exists, you will get the following error (something you will never see if using this stored proc):
-- Using the stored procedure eliminates this error:
Msg 1781, Level 16, State 1, Line 1
Column already has a DEFAULT bound to it.
Msg 1750, Level 16, State 0, Line 1
Could not create constraint. See previous errors.
I see the most voted answer doesn't solve this question, which is in the context of rebasing.
The only way to synchronize the two diverged branches is to merge them back together, resulting in an extra merge commit and two sets of commits that contain the same changes (the original ones, and the ones from your rebased branch). Needless to say, this is a very confusing situation.
So, before you run git rebase
, always ask yourself, “Is anyone else looking at this branch?” If the answer is yes, take your hands off the keyboard and start thinking about a non-destructive way to make your changes (e.g., the git revert
command). Otherwise, you’re safe to re-write history as much as you like.
Reference: https://www.atlassian.com/git/tutorials/merging-vs-rebasing#the-golden-rule-of-rebasing
Much simpler: use sudo
to run a shell and use a heredoc to feed it commands.
#!/usr/bin/env bash
whoami
sudo -i -u someuser bash << EOF
echo "In"
whoami
EOF
echo "Out"
whoami
(answer originally on SuperUser)
Without using third party libraries, calling the same method more than once or creating an array, you can find the maximum of an arbitrary number of doubles like so
public static double max(double... n) {
int i = 0;
double max = n[i];
while (++i < n.length)
if (n[i] > max)
max = n[i];
return max;
}
In your example, max
could be used like this
final static int MY_INT1 = 25;
final static int MY_INT2 = -10;
final static double MY_DOUBLE1 = 15.5;
public static void main(String[] args) {
double maxOfNums = max(MY_INT1, MY_INT2, MY_DOUBLE1);
}
The method which you are using is rendering login button from the Facebook Javascript code. However, you can write your own Javascript code function to mimic the functionality. Here is how to do it -
onclick
method on anchor tag which would actually do the real job.<a href="#" onclick="fb_login();"><img src="images/fb_login_awesome.jpg" border="0" alt=""></a>
window.fbAsyncInit = function() {
FB.init({
appId : 'YOUR_APP_ID',
oauth : true,
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true // parse XFBML
});
};
function fb_login(){
FB.login(function(response) {
if (response.authResponse) {
console.log('Welcome! Fetching your information.... ');
//console.log(response); // dump complete info
access_token = response.authResponse.accessToken; //get access token
user_id = response.authResponse.userID; //get FB UID
FB.api('/me', function(response) {
user_email = response.email; //get user email
// you can store this data into your database
});
} else {
//user hit cancel button
console.log('User cancelled login or did not fully authorize.');
}
}, {
scope: 'public_profile,email'
});
}
(function() {
var e = document.createElement('script');
e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
e.async = true;
document.getElementById('fb-root').appendChild(e);
}());
Please note that the above function is fully tested and works. You just need to put your facebook APP ID and it will work.
HTML 5 allows summary tag, details element. That can be used to view or hide (collapse/expand) a section. Link
Do you get an error when you try to map through the object keys, or does it throw something else.
Also note when you want to map through the keys you make sure to refer to the object keys correctly. Just like this:
{ Object.keys(subjects).map((item, i) => (
<li className="travelcompany-input" key={i}>
<span className="input-label">key: {i} Name: {subjects[item]}</span>
</li>
))}
You need to use {subjects[item]}
instead of {subjects[i]}
because it refers to the keys of the object. If you look for subjects[i] you will get undefined.
It's really a matter of opinion. In your example, System.out.println(5)
would be slightly more efficient, as you only refer to the number once and never change it. As was said in a comment, int
is a primitive type and not a reference - thus it doesn't take up much space. However, you might want to set actual reference variables to null only if they are used in a very complicated method. All local reference variables are garbage collected when the method they are declared in returns.
Use .unshift()
to add to the beginning of an array.
TheArray.unshift(TheNewObject);
See MDN for doc on unshift()
and here for doc on other array methods.
FYI, just like there's .push()
and .pop()
for the end of the array, there's .shift()
and .unshift()
for the beginning of the array.
<script type="text/javascript">
if(jQuery('input[id=input_id]').is(':checked')){
// Your Statment
}else{
// Your Statment
}
OR
if(jQuery('input[name=input_name]').is(':checked')){
// Your Statment
}else{
// Your Statment
}
</script>
Code taken from here : http://chandreshrana.blogspot.in/2015/10/how-to-check-if-checkbox-is-checked-or.html
If cars
is a sequence you can just do
for car in cars[1:-1]:
pass
I was using spring boot 1.5.10 and tries to exclude logback, the given solution above did not work well, I use configurations instead
configurations.all {
exclude group: "org.springframework.boot", module:"spring-boot-starter-logging"
}
angualr uses the lighter version of jquery called as jqlite which means it doesnt have all the features of jQuery. here is a reference in angularjs docs about what you can use from jquery. Angular Element docs
In your case you need to find a div with ID or class name. for class name you can use
var elems =$element.find('div') //returns all the div's in the $elements
angular.forEach(elems,function(v,k)){
if(angular.element(v).hasClass('class-name')){
console.log(angular.element(v));
}}
or you can use much simpler way by query selector
angular.element(document.querySelector('#id'))
angular.element(elem.querySelector('.classname'))
it is not as flexible as jQuery but what
Verify that the application pool in IIS (in the case of IIS7 or above) is selected as integrated. In this case, probably change to Classic can solve this problem.
For non-preemptive system,
waitingTime = startTime - arrivalTime
turnaroundTime = burstTime + waitingTime = finishTime- arrivalTime
startTime = Time at which the process started executing
finishTime = Time at which the process finished executing
You can keep track of the current time elapsed in the system(timeElapsed
). Assign all processors to a process in the beginning, and execute until the shortest process is done executing. Then assign this processor which is free to the next process in the queue. Do this until the queue is empty and all processes are done executing. Also, whenever a process starts executing, recored its startTime
, when finishes, record its finishTime
(both same as timeElapsed
). That way you can calculate what you need.
Combining the earlier suggestions to determine your personal permissions (ie 'USER' permissions), then use this:
-- your permissions
select * from USER_ROLE_PRIVS where USERNAME= USER;
select * from USER_TAB_PRIVS where Grantee = USER;
select * from USER_SYS_PRIVS where USERNAME = USER;
-- granted role permissions
select * from ROLE_ROLE_PRIVS where ROLE IN (select granted_role from USER_ROLE_PRIVS where USERNAME= USER);
select * from ROLE_TAB_PRIVS where ROLE IN (select granted_role from USER_ROLE_PRIVS where USERNAME= USER);
select * from ROLE_SYS_PRIVS where ROLE IN (select granted_role from USER_ROLE_PRIVS where USERNAME= USER);
KeyPress
, KeyUp
and KeyDown
are analogous to, respectively: Click
, MouseUp,
and MouseDown
.
Down
happens firstPress
happens second (when text is entered)Up
happens last (when text input is complete).keydown
keypress
textInput
keyup
Below is a snippet you can use to see for yourself when the events get fired:
window.addEventListener("keyup", log);
window.addEventListener("keypress", log);
window.addEventListener("keydown", log);
function log(event){
console.log( event.type );
}
_x000D_
This is the problem
double a[] = null;
Since a
is null
, NullPointerException
will arise every time you use it until you initialize it. So this:
a[i] = var;
will fail.
A possible solution would be initialize it when declaring it:
double a[] = new double[PUT_A_LENGTH_HERE]; //seems like this constant should be 7
IMO more important than solving this exception, is the fact that you should learn to read the stacktrace and understand what it says, so you could detect the problems and solve it.
java.lang.NullPointerException
This exception means there's a variable with null
value being used. How to solve? Just make sure the variable is not null
before being used.
at twoten.TwoTenB.(TwoTenB.java:29)
This line has two parts:
<init>
method in class TwoTenB
declared in package twoten
. When you encounter an error message with SomeClassName.<init>
, means the error was thrown while creating a new instance of the class e.g. executing the constructor (in this case that seems to be the problem).a[i] = var;
.From this line, other lines will be similar to tell you where the error arose. So when reading this:
at javapractice.JavaPractice.main(JavaPractice.java:32)
It means that you were trying to instantiate a TwoTenB
object reference inside the main
method of your class JavaPractice
declared in javapractice
package.
Problems only surface when I am I trying to give the first loaded content an active state
Does this mean that you want to add a class to the first button?
$('.o-links').click(function(e) { // ... }).first().addClass('O_Nav_Current');
instead of using IDs for the slider's items and resetting html contents you can use classes and indexes:
CSS:
.image-area { width: 100%; height: auto; display: none; } .image-area:first-of-type { display: block; }
JavaScript:
var $slides = $('.image-area'), $btns = $('a.o-links'); $btns.on('click', function (e) { var i = $btns.removeClass('O_Nav_Current').index(this); $(this).addClass('O_Nav_Current'); $slides.filter(':visible').fadeOut(1000, function () { $slides.eq(i).fadeIn(1000); }); e.preventDefault(); }).first().addClass('O_Nav_Current');
You can use
$window.scrollTo(x, y);
where x
is the pixel along the horizontal axis and y
is the pixel along the vertical axis.
Scroll to top
$window.scrollTo(0, 0);
Focus on element
$window.scrollTo(0, angular.element('put here your element').offsetTop);
Update:
Also you can use $anchorScroll
ReDim aFirstArray(0)
This will resize the array to zero and erase all data.
I'm wondering if there is any way to get a value from a Promise or wait (block/sleep) until it has resolved, similar to .NET's IAsyncResult.WaitHandle.WaitOne(). I know JavaScript is single-threaded, but I'm hoping that doesn't mean that a function can't yield.
The current generation of Javascript in browsers does not have a wait()
or sleep()
that allows other things to run. So, you simply can't do what you're asking. Instead, it has async operations that will do their thing and then call you when they're done (as you've been using promises for).
Part of this is because of Javascript's single threadedness. If the single thread is spinning, then no other Javascript can execute until that spinning thread is done. ES6 introduces yield
and generators which will allow some cooperative tricks like that, but we're quite a ways from being able to use those in a wide swatch of installed browsers (they can be used in some server-side development where you control the JS engine that is being used).
Careful management of promise-based code can control the order of execution for many async operations.
I'm not sure I understand exactly what order you're trying to achieve in your code, but you could do something like this using your existing kickOff()
function, and then attaching a .then()
handler to it after calling it:
function kickOff() {
return new Promise(function(resolve, reject) {
$("#output").append("start");
setTimeout(function() {
resolve();
}, 1000);
}).then(function() {
$("#output").append(" middle");
return " end";
});
}
kickOff().then(function(result) {
// use the result here
$("#output").append(result);
});
This will return output in a guaranteed order - like this:
start
middle
end
Update in 2018 (three years after this answer was written):
If you either transpile your code or run your code in an environment that supports ES7 features such as async
and await
, you can now use await
to make your code "appear" to wait for the result of a promise. It is still developing with promises. It does still not block all of Javascript, but it does allow you to write sequential operations in a friendlier syntax.
Instead of the ES6 way of doing things:
someFunc().then(someFunc2).then(result => {
// process result here
}).catch(err => {
// process error here
});
You can do this:
// returns a promise
async function wrapperFunc() {
try {
let r1 = await someFunc();
let r2 = await someFunc2(r1);
// now process r2
return someValue; // this will be the resolved value of the returned promise
} catch(e) {
console.log(e);
throw e; // let caller know the promise was rejected with this reason
}
}
wrapperFunc().then(result => {
// got final result
}).catch(err => {
// got error
});
The JOIN
statements are also part of the FROM
clause, more formally a join_type is used to combine two from_item's into one from_item, multiple one of which can then form a comma-separated list after the FROM
. See http://www.postgresql.org/docs/9.1/static/sql-select.html .
So the direct solution to your problem is:
SELECT something
FROM
master as parent LEFT JOIN second as parentdata
ON parent.secondary_id = parentdata.id,
master as child LEFT JOIN second as childdata
ON child.secondary_id = childdata.id
WHERE parent.id = child.parent_id AND parent.parent_id = 'rootID'
A better option would be to only use JOIN
's, as it has already been suggested.
do you work with a 3d tool such as maya? for maya you can look at http://www.inka3d.com
ORA-12899: value too large for column "DJ"."CUSTOMERS"."ADDRESS" (actual: 25, maximum: 2
Tells you what the error is. Address can hold maximum of 20 characters, you are passing 25 characters.
I see this is quite an old post, but came across this looking for an answer for this problem. After reading some of the answers they seem very long winded, so after about 5 mins I managed to solve the problem very simply as follows:
httpd.conf for Apache leave the listen port as 80 and 'Server Name' as FQDN/IP :80.
Now for IIS go to Administrative Services > IIS Manager > 'Sites' in the Left hand nav drop down > in the right window select the top line (default web site) then bindings on the right.
Now select http > edit and change to 81 and enter your local IP for the server/pc and in domain enter either your FQDN (www.domain.com) or external IP close.
Restart both servers ensure your ports are open on both router and firewall, done.
This sounds long winded but literally took 5 mins of playing about. works perfectly.
System: Windows 8, IIS 8, Apache 2.2
Yes, JavaScript variables will exist in the scope they are created.
var bannerID = 55;
<input id="EditBanner" type="button"
value="Edit Image" onclick="EditBanner(bannerID);"/>
function EditBanner(id) {
//Do something with id
}
If you use event handlers and jQuery it is simple also
$("#EditBanner").click(function() {
EditBanner(bannerID);
});
I tried to resolve with the suggested answer and still ran into some issues...
This was a solution to my problem:
ARG APP_EXE="AppName.exe"
ENV _EXE=${APP_EXE}
# Build a shell script because the ENTRYPOINT command doesn't like using ENV
RUN echo "#!/bin/bash \n mono ${_EXE}" > ./entrypoint.sh
RUN chmod +x ./entrypoint.sh
# Run the generated shell script.
ENTRYPOINT ["./entrypoint.sh"]
Specifically targeting your problem:
RUN echo "#!/bin/bash \n ./greeting --message ${ADDRESSEE}" > ./entrypoint.sh
RUN chmod +x ./entrypoint.sh
ENTRYPOINT ["./entrypoint.sh"]
The ESCAPE keyword is used if you need to search for special characters like % and _, which are normally wild cards. If you specify ESCAPE, SQL will search literally for the characters % and _.
Here's a good article with some more examples
SELECT columns FROM table WHERE
column LIKE '%[[]SQL Server Driver]%'
-- or
SELECT columns FROM table WHERE
column LIKE '%\[SQL Server Driver]%' ESCAPE '\'
The Home button is a very dangerous button to override and, because of that, Android will not let you override its behavior the same way you do the BACK button.
Take a look at this discussion.
You will notice that the home button seems to be implemented as a intent invocation, so you'll end up having to add an intent category to your activity. Then, any time the user hits home, your app will show up as an option. You should consider what it is you are looking to accomplish with the home button. If its not to replace the default home screen of the device, I would be wary of overloading the HOME button, but it is possible (per discussion in above thread.)
If you change a login user credential or add new login user then after you need to log in then you will have to restart the SQL Server Service. for that
Then go to SQL Server(MSSQLSERVER) and stop and start again
Now try to log in, I hope You can.
Thanks
If someone is still finding it hard, this simple thing worked for me:
On you main system let's say Hosting PC... Go to Control Panel > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall > Change settings > Find "Apache HTTP Server" > Check both the check-boxes (under Private & Public). See Screenshot
On any another system connected over a same network... Open browser > type: your hosting pc's IP adress followed by your project name in the url bar. Example: 192.168.72.111/example.com/
Hope it helps! Thanks.
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value != null)
{
MessageBox.Show(dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString());
}
}
I created my own Gem, but I did it in a directory that is not in my load path:
$ pwd
/Users/myuser/projects
$ gem build my_gem/my_gem.gemspec
Then I ran irb
and tried to load the Gem:
> require 'my_gem'
LoadError: cannot load such file -- my_gem
I used the global variable $: to inspect my load path and I realized I am using RVM. And rvm has specific directories in my load path $:
. None of those directories included my ~/projects directory where I created the custom gem.
So one solution is to modify the load path itself:
$: << "/Users/myuser/projects/my_gem/lib"
Note that the lib directory is in the path, which holds the my_gem.rb file which will be required in irb:
> require 'my_gem'
=> true
Now if you want to install the gem in RVM path, then you would need to run:
$ gem install my_gem
But it will need to be in a repository like rubygems.org.
$ gem push my_gem-0.0.0.gem
Pushing gem to RubyGems.org...
Successfully registered gem my_gem
Create a subclass of django.core.management.commands.runserver.Command
and overwrite the default_port
member. Save the file as a management command of your own, e.g. under <app-name>/management/commands/runserver.py
:
from django.conf import settings
from django.core.management.commands import runserver
class Command(runserver.Command):
default_port = settings.RUNSERVER_PORT
I'm loading the default port form settings here (which in turn reads other configuration files), but you could just as well read it from some other file directly.
You need to provide a body for the get;
portion as well as the set;
portion of the property.
I suspect you want this to be:
private int _hour; // backing field
private int Hour
{
get { return _hour; }
set
{
//make sure hour is positive
if (value < MIN_HOUR)
{
_hour = 0;
MessageBox.Show("Hour value " + value.ToString() + " cannot be negative. Reset to " + MIN_HOUR.ToString(),
"Invalid Hour", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
//take the modulus to ensure always less than 24 hours
//works even if the value is already within range, or value equal to 24
_hour = value % MAX_HOUR;
}
}
}
That being said, I'd also consider making this code simpler. It's probably is better to use exceptions rather than a MessageBox inside of your property setter for invalid input, as it won't tie you to a specific UI framework.
If that is inappropriate, I would recommend converting this to a method instead of using a property setter. This is especially true since properties have an implicit expectation of being "lightweight"- and displaying a MessageBox to the user really violates that expectation.
If you want to have element with visible blank text just do this:
$('#doc_title').html(' ');
The best way to resolve this one is. Download the latest container-selinux package from http://mirror.centos.org/centos/7/extras/x86_64/Packages/ into the VM or the Machine where docker needs to be installed. Error : sometime it will ask for red hat subscription to download from repo. we can do it manually with out subscription as below Run the below command this will install dependencies manually rpm -i container-selinux-2.107-3.el7.noarch.rpm then run the yum install docker-ce
thanks Saa
JsonObjectRequest
actually accepts JSONObject
as body.
From this blog article,
final String url = "some/url";
final JSONObject jsonBody = new JSONObject("{\"type\":\"example\"}");
new JsonObjectRequest(url, jsonBody, new Response.Listener<JSONObject>() { ... });
Here is the source code and JavaDoc (@param jsonRequest
):
/**
* Creates a new request.
* @param method the HTTP method to use
* @param url URL to fetch the JSON from
* @param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
* indicates no parameters will be posted along with request.
* @param listener Listener to receive the JSON response
* @param errorListener Error listener, or null to ignore errors.
*/
public JsonObjectRequest(int method, String url, JSONObject jsonRequest,
Listener<JSONObject> listener, ErrorListener errorListener) {
super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
errorListener);
}
You current regex will only match 1 character. you need either * (includes empty string) or + (at least one) to match multiple characters and numbers have a shortcut : \d (need \\ in a string).
word.matches("^[\\d,;]+$")
The Pattern documentation is pretty good : http://download.oracle.com/javase/1.5.0/docs/api/java/util/regex/Pattern.html
Also you can try your regexps online at: http://www.regexplanet.com/simple/index.html
Be aware that classes that descend from NumberFormat (and most other Format descendants) are not synchronized. It is a common (but dangerous) practice to create format objects and store them in static variables in a util class. In practice, it will pretty much always work until it starts experiencing significant load.
Some options:
You can use the Execute Package Utility to change your datasource, before running the package.
You can run your package using DTEXEC, and change your connection by passing in a /CONNECTION parameter. Probably save it as a batch so next time you don't need to type the whole thing and just change the datasource as required.
You can use the SSIS XML package configuration file. Here is a walk through.
You can save your configrations in a database table.
In Django 3.0 auto_now_add
seems to work with auto_now
reg_date=models.DateField(auto_now=True,blank=True)
The method of Srikar works very well, if you know both height and width of your new Size. If you for example know only the width you want to scale to and don't care about the height you first have to calculate the scale factor of the height.
+(UIImage*)imageWithImage: (UIImage*) sourceImage scaledToWidth: (float) i_width
{
float oldWidth = sourceImage.size.width;
float scaleFactor = i_width / oldWidth;
float newHeight = sourceImage.size.height * scaleFactor;
float newWidth = oldWidth * scaleFactor;
UIGraphicsBeginImageContext(CGSizeMake(newWidth, newHeight));
[sourceImage drawInRect:CGRectMake(0, 0, newWidth, newHeight)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Use one of these as per your requirements.
Open the linked document in a new window or tab:
<a href="xyz.html" target="_blank"> Link </a>
Open the linked document in the same frame as it was clicked (this is default):
<a href="xyz.html" target="_self"> Link </a>
Open the linked document in the parent frame:
<a href="xyz.html" target="_parent"> Link </a>
Open the linked document in the full body of the window:
<a href="xyz.html" target="_top"> Link </a>
Open the linked document in a named frame:
<a href="xyz.html" target="framename"> Link </a>
Also, you can call into Objective-C runtime to call the method.
Notepad++ provides 2 types of features:
Based on what you write, it seems what you want is auto-completion on function only + suggestion on arguments.
To do that, you just need to change a setting.
Settings
> Preferences...
> Auto-completion
Enable Auto-completion on each input
Function completion
and not Word completion
Function parameter hint on input
(if you have this option)On version 6.5.5 of Notepad++, I have this setting
Some documentation about auto-completion is available in Notepad++ Wiki.
One of these will work...
<head>_x000D_
<meta http-equiv='refresh' content='0; URL=http://example.com/'>_x000D_
</head>
_x000D_
...or it can done with JavaScript:
window.location.href = 'https://example.com/';
_x000D_
I have same Issue, fixed by Adding @EnableMongoRepositories("in.topthree.util")
package in.topthree.core;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import in.topthree.util.Student;
@SpringBootApplication
@EnableMongoRepositories("in.topthree.util")
public class Run implements CommandLineRunner {
public static void main(String[] args) {
SpringApplication.run(Run.class, args);
System.out.println("Run");
}
@Autowired
private Process pr;
@Override
public void run(String... args) throws Exception {
pr.saveDB(new Student("Testing", "FB"));
System.exit(0);
}
}
And my Repository is:
package in.topthree.util;
import org.springframework.data.mongodb.repository.MongoRepository;
public interface StudentMongo extends MongoRepository<Student, Integer> {
public Student findByUrl(String url);
}
Now Its Working
Depends on how much space you want. I'm not sure I agree with the logic of adding a "col-XX-1" in between each one, because you are then defining an entire "column" in between each one.
If you just want "a little spacing" in between each button, I like to add padding to the encompassing row. That way, I can still use all 12 columns, while including a "space" in between each button.
Bootply: http://www.bootply.com/ugeXrxpPvD
You can use like this:
public static String executeHttpPost1(String url,
HashMap<String, String> postParameters) throws UnsupportedEncodingException {
// TODO Auto-generated method stub
HttpClient client = getNewHttpClient();
try{
request = new HttpPost(url);
}
catch(Exception e){
e.printStackTrace();
}
if(postParameters!=null && postParameters.isEmpty()==false){
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(postParameters.size());
String k, v;
Iterator<String> itKeys = postParameters.keySet().iterator();
while (itKeys.hasNext())
{
k = itKeys.next();
v = postParameters.get(k);
nameValuePairs.add(new BasicNameValuePair(k, v));
}
UrlEncodedFormEntity urlEntity = new UrlEncodedFormEntity(nameValuePairs);
request.setEntity(urlEntity);
}
try {
Response = client.execute(request,localContext);
HttpEntity entity = Response.getEntity();
int statusCode = Response.getStatusLine().getStatusCode();
Log.i(TAG, ""+statusCode);
Log.i(TAG, "------------------------------------------------");
try{
InputStream in = (InputStream) entity.getContent();
//Header contentEncoding = Response.getFirstHeader("Content-Encoding");
/*if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
in = new GZIPInputStream(in);
}*/
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while((line = reader.readLine()) != null){
str.append(line + "\n");
}
in.close();
response = str.toString();
Log.i(TAG, "response"+response);
}
catch(IllegalStateException exc){
exc.printStackTrace();
}
} catch(Exception e){
Log.e("log_tag", "Error in http connection "+response);
}
finally {
}
return response;
}
For importing csv with a header row using mysqlimport, just add
--ignore-lines=N
(ignores the first N lines of the data file)
This option is described in the page you've linked.
If you know the number of columns at compile time, it's pretty simple:
#define COLS ...
...
size_t rows;
// get number of rows
T (*ap)[COLS] = malloc(sizeof *ap * rows); // ap is a *pointer to an array* of T
You can treat ap
like any 2D array:
ap[i][j] = x;
When you're done you deallocate it as
free(ap);
If you don't know the number of columns at compile time, but you're working with a C99 compiler or a C2011 compiler that supports variable-length arrays, it's still pretty simple:
size_t rows;
size_t cols;
// get rows and cols
T (*ap)[cols] = malloc(sizeof *ap * rows);
...
ap[i][j] = x;
...
free(ap);
If you don't know the number of columns at compile time and you're working with a version of C that doesn't support variable-length arrays, then you'll need to do something different. If you need all of the elements to be allocated in a contiguous chunk (like a regular array), then you can allocate the memory as a 1D array, and compute a 1D offset:
size_t rows, cols;
// get rows and columns
T *ap = malloc(sizeof *ap * rows * cols);
...
ap[i * rows + j] = x;
...
free(ap);
If you don't need the memory to be contiguous, you can follow a two-step allocation method:
size_t rows, cols;
// get rows and cols
T **ap = malloc(sizeof *ap * rows);
if (ap)
{
size_t i = 0;
for (i = 0; i < cols; i++)
{
ap[i] = malloc(sizeof *ap[i] * cols);
}
}
ap[i][j] = x;
Since allocation was a two-step process, deallocation also needs to be a two-step process:
for (i = 0; i < cols; i++)
free(ap[i]);
free(ap);
No. Its not possible to add link through css. But you can use jquery
$('.case').each(function() {
var link = $(this).html();
$(this).contents().wrap('<a href="example.com/script.php?id="></a>');
});
Here the demo: http://jsfiddle.net/r5uWX/1/
Sample query
SET @runtot:=0;
SELECT
q1.d,
q1.c,
(@runtot := @runtot + q1.c) AS rt
FROM
(SELECT
DAYOFYEAR(date) AS d,
COUNT(*) AS c
FROM orders
WHERE hasPaid > 0
GROUP BY d
ORDER BY d) AS q1
brew help
. If brew is there, you get output. If not, you get 'command not found'. If you need to check in a script, you can work out how to redirect output and check $?
.
It's same as vikasdumca's steps, but thought to share the link.
run the following command
sudo apt-get install python-software-properties
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
then
sudo apt-get install oracle-java8-installer
this would install oracle java 8 on ubuntu properly.
find it from this post
you can find more info on "Managing Java" or "Setting the "JAVA_HOME" environment variable" from the post.
In web.config add this under system.webserver tag as below,
<system.webServer>
<httpErrors errorMode="Custom" existingResponse="Replace">
<remove statusCode="404"/>
<remove statusCode="500"/>
<error statusCode="404" responseMode="ExecuteURL" path="/Error/NotFound"/>
<error statusCode="500" responseMode="ExecuteURL"path="/Error/ErrorPage"/>
</httpErrors>
and add a controller as,
public class ErrorController : Controller
{
//
// GET: /Error/
[GET("/Error/NotFound")]
public ActionResult NotFound()
{
Response.StatusCode = 404;
return View();
}
[GET("/Error/ErrorPage")]
public ActionResult ErrorPage()
{
Response.StatusCode = 500;
return View();
}
}
and add their respected views, this will work definitely I guess for all.
This solution I found it from: Neptune Century
More elegant option:
String phone = "+34666777888";
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.fromParts("tel", phone, null));
startActivity(intent);
//Hide keyBoard by touching background in view
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[[self view] endEditing:YES];
}
At last this post helps me on iOS: http://www.excellentwebworld.com/phonegap-open-a-link-in-safari-or-external-browser/.
Open "CDVwebviewDelegate.m" file and search "shouldStartLoadWithRequest", then add this code to the beginning of the function:
if([[NSString stringWithFormat:@"%@",request.URL] rangeOfString:@"file"].location== NSNotFound) { [[UIApplication sharedApplication] openURL:[request URL]]; return NO; }
While using navigator.app.loadUrl("http://google.com", {openExternal : true});
for Android is OK.
Via Cordova 3.3.0.
What I did not like with many answers is that it makes way too many system calls by writing to the file line per line. Imho it is best to join list with '\n' (line return) and then write it only once to the file:
mylist = ["abc", "def", "ghi"]
myfile = "file.txt"
with open(myfile, 'w') as f:
f.write("\n".join(mylist))
and then to open it and get your list again:
with open(myfile, 'r') as f:
mystring = f.read()
my_list = mystring.split("\n")
From php.net
@Alexandre - short solution
<?php
function vname(&$var, $scope=0)
{
$old = $var;
if (($key = array_search($var = 'unique'.rand().'value', !$scope ? $GLOBALS : $scope)) && $var = $old) return $key;
}
?>
@Lucas - usage
<?php
//1. Use of a variable contained in the global scope (default):
$my_global_variable = "My global string.";
echo vname($my_global_variable); // Outputs: my_global_variable
//2. Use of a local variable:
function my_local_func()
{
$my_local_variable = "My local string.";
return vname($my_local_variable, get_defined_vars());
}
echo my_local_func(); // Outputs: my_local_variable
//3. Use of an object property:
class myclass
{
public function __constructor()
{
$this->my_object_property = "My object property string.";
}
}
$obj = new myclass;
echo vname($obj->my_object_property, $obj); // Outputs: my_object_property
?>
You must ";" separator, CSV => Comma Separator Value
ofstream Morison_File ("linear_wave_loading.csv"); //Opening file to print info to
Morison_File << "'Time'; 'Force(N/m)' " << endl; //Headings for file
for (t = 0; t <= 20; t++) {
u = sin(omega * t);
du = cos(omega * t);
F = (0.5 * rho * C_d * D * u * fabs(u)) + rho * Area * C_m * du;
cout << "t = " << t << "\t\tF = " << F << endl;
Morison_File << t << ";" << F;
}
Morison_File.close();
Use CodeSource#getLocation()
. This works fine in JAR files as well. You can obtain CodeSource
by ProtectionDomain#getCodeSource()
and the ProtectionDomain
in turn can be obtained by Class#getProtectionDomain()
.
public class Test {
public static void main(String... args) throws Exception {
URL location = Test.class.getProtectionDomain().getCodeSource().getLocation();
System.out.println(location.getFile());
}
}
Update as per the comment of the OP:
I want to dump a bunch of CSV files in a folder, have the program recognize all the files, then load the data and manipulate them. I really just want to know how to navigate to that folder.
That would require hardcoding/knowing their relative path in your program. Rather consider adding its path to the classpath so that you can use ClassLoader#getResource()
File classpathRoot = new File(classLoader.getResource("").getPath());
File[] csvFiles = classpathRoot.listFiles(new FilenameFilter() {
@Override public boolean accept(File dir, String name) {
return name.endsWith(".csv");
}
});
Or to pass its path as main()
argument.
To answer your question literally, here's how to get the next value of a sequence without incrementing it:
SELECT
CASE WHEN is_called THEN
last_value + 1
ELSE
last_value
END
FROM sequence_name
Obviously, it is not a good idea to use this code in practice. There is no guarantee that the next row will really have this ID. However, for debugging purposes it might be interesting to know the value of a sequence without incrementing it, and this is how you can do it.
using Bharat Patil answer simply return false inside the your bind callback to prevent maximum stack error see example below:
$('#test_div').bind('resize', function(){
console.log('resized');
return false;
});
Ruby 1.9.2 and Rails 3 have an easy way to run one spec file:
ruby -I spec spec/models/user_spec.rb
Explanation:
ruby
command tends to be faster than the rake
command
-I spec
means "include the 'spec' directory when looking for files"
spec/models/user_spec.rb
is the file we want to run.
In future, for those that use python3 and later, here's another code to find response code.
import urllib.request
def getResponseCode(url):
conn = urllib.request.urlopen(url)
return conn.getcode()
To change JDK's version, you can do:
1- Project > Properties
2- Go to Java Build Path
3- In Libraries, select JRE System ... and click on Edit
4- Choose your appropriate version and validate
There is actually a nice Gem called local_time
by basecamp to do all of that on client side only, I believe:
Prefixing an "!" symbol to commands you type in pdb seems to have the same effect as doing something in an IPython shell. This works for accessing help for a certain function, or even variable names. Maybe this will help you to some extent. For example,
ipdb> help(numpy.transpose)
*** No help on (numpy.transpose)
But !help(numpy.transpose) will give you the expected help page on numpy.transpose. Similarly for variable names, say you have a variable l, typing "l" in pdb lists the code, but !l prints the value of l.
I myself am trying to see how can I update RC4 to RC5 and thus I stumbled upon this entry and new approach to dynamic component creation still holds a bit of mystery to me, so I wont suggest anything on component factory resolver.
But, what I can suggest is a bit clearer approach to component creation on this scenario - just use switch in template that would create string editor or text editor according to some condition, like this:
<form [ngSwitch]="useTextarea">
<string-editor *ngSwitchCase="false" propertyName="'code'"
[entity]="entity"></string-editor>
<text-editor *ngSwitchCase="true" propertyName="'code'"
[entity]="entity"></text-editor>
</form>
And by the way, "[" in [prop] expression have a meaning, this indicates one way data binding, hence you can and even should omit those in case if you know that you do not need to bind property to variable.
For simple input, like two prompts and two corresponding fixed responses, you could also use a "here document", the syntax of which looks like this:
test.sh <<!
y
pasword
!
The << prefixes a pattern, in this case '!'. Everything up to a line beginning with that pattern is interpreted as standard input. This approach is similar to the suggestion to pipe a multi-line echo into ssh, except that it saves the fork/exec of the echo command and I find it a bit more readable. The other advantage is that it uses built-in shell functionality so it doesn't depend on expect.
In the comments of @Bassetassen's answer, @plosco mentioned that you can use git clone https://<token>@github.com/username/repository.git
to clone from GitHub at the very least. I thought I would expand on how to do that, in case anyone comes across this answer like I did while trying to automate some cloning.
GitHub has a very handy guide on how to do this, but it doesn't cover what to do if you want to include it all in one line for automation purposes. It warns that adding the token to the clone URL will store it in plaintext in .git/config
. This is obviously a security risk for almost every use case, but since I plan on deleting the repo and revoking the token when I'm done, I don't care.
GitHub has a whole guide here on how to get a token, but here's the TL;DR.
Same as the command @plosco gave, git clone https://<token>@github.com/<username>/<repository>.git
, just replace <token>
, <username>
and <repository>
with whatever your info is.
If you want to clone it to a specific folder, just insert the folder address at the end like so: git clone https://<token>@github.com/<username>/<repository.git> <folder>
, where <folder>
is, you guessed it, the folder to clone it to! You can of course use .
, ..
, ~
, etc. here like you can elsewhere.
Not all of this may be necessary, depending on how sensitive what you're doing is.
rm -rf <folder>
.git remote remove origin
or just remove the token by running git remote set-url origin https://github.com/<username>/<repository.git>
.Note that I'm no pro, so the above may not be secure in the sense that no trace would be left for any sort of forensic work.
final ListView lv = (ListView) findViewById(R.id.ListView01);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
String selectedFromList =(String) (lv.getItemAtPosition(myItemInt));
}
});
I hope this fixes your problem.
You may also use:
request.POST.get('section','') # => [39]
request.POST.get('MAINS','') # => [137]
request.GET.get('section','') # => [39]
request.GET.get('MAINS','') # => [137]
Using this ensures that you don't get an error. If the POST/GET data with any key is not defined then instead of raising an exception the fallback value (second argument of .get() will be used).
You're trying to access a 3 dimensional array with 4 de-references
You only need 3 loops instead of 4, or int myArray[10][10][10][10];
If your array is static or global it's initialized to zero before main() starts. That would be the most efficient option.
I don't know how stubhub's api works, but generally it should look like this:
s = requests.Session()
data = {"login":"my_login", "password":"my_password"}
url = "http://example.net/login"
r = s.post(url, data=data)
Now your session contains cookies provided by login form. To access cookies of this session simply use
s.cookies
Any further actions like another requests will have this cookie
I faced the same problem. Follow these steps:
There is another very obvious way to convert HTML to PDf using JavaScript: use an online API for that. This will work fine if you don't need to do the conversion when the user is offline.
PdfMage is one option that has a nice API and offers free accounts. I'm sure you can find many alternatives (for example, here)
For PdfMage API you'd have something like this:
$.ajax({
url: "https://pdfmage.org/pdf-api/v1/process",
type: "POST",
crossDomain: true,
data: { Html:"<html><body>Hi there!</body></html>" },
dataType: "json",
headers: {
"X-Api-Key": "your-key-here" // not very secure, but a valid option for non-public domains/intranet
},
success: function (response) {
window.location = response.Data.DownloadUrl;
},
error: function (xhr, status) {
alert("error");
}
});
The cin.clear()
clears the error flag on cin
(so that future I/O operations will work correctly), and then cin.ignore(10000, '\n')
skips to the next newline (to ignore anything else on the same line as the non-number so that it does not cause another parse failure). It will only skip up to 10000 characters, so the code is assuming the user will not put in a very long, invalid line.
Simplicity is a virtue. Use this naturally readable array:
char alphabet[] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};
Your /home/gnu/bin/c++
seem to require additional flag to link things properly and CMake doesn't know about that.
To use /usr/bin/c++
as your compiler run cmake
with -DCMAKE_CXX_COMPILER=/usr/bin/c++
.
Also, CMAKE_PREFIX_PATH
variable sets destination dir where your project' files should be installed. It has nothing to do with CMake installation prefix and CMake itself already know this.
From Wikipedia's Virtual function ...
In object-oriented programming, in languages such as C++, and Object Pascal, a virtual function or virtual method is an inheritable and overridable function or method for which dynamic dispatch is facilitated. This concept is an important part of the (runtime) polymorphism portion of object-oriented programming (OOP). In short, a virtual function defines a target function to be executed, but the target might not be known at compile time.
Unlike a non-virtual function, when a virtual function is overridden the most-derived version is used at all levels of the class hierarchy, rather than just the level at which it was created. Therefore if one method of the base class calls a virtual method, the version defined in the derived class will be used instead of the version defined in the base class.
This is in contrast to non-virtual functions, which can still be overridden in a derived class, but the "new" version will only be used by the derived class and below, but will not change the functionality of the base class at all.
whereas..
A pure virtual function or pure virtual method is a virtual function that is required to be implemented by a derived class if the derived class is not abstract.
When a pure virtual method exists, the class is "abstract" and can not be instantiated on its own. Instead, a derived class that implements the pure-virtual method(s) must be used. A pure-virtual isn't defined in the base-class at all, so a derived class must define it, or that derived class is also abstract, and can not be instantiated. Only a class that has no abstract methods can be instantiated.
A virtual provides a way to override the functionality of the base class, and a pure-virtual requires it.
If you are using RxJS 6.0.0:
import { from } from 'rxjs';
const observable = from(promise);
If you don't want to wrap it in another div as other answers have suggested, you can also wrap it in an array and it will work.
// Wrong!
return (
<Comp1 />
<Comp2 />
)
It can be written as:
// Correct!
return (
[<Comp1 />,
<Comp2 />]
)
Please note that the above will generate a warning: Warning: Each child in an array or iterator should have a unique "key" prop. Check the render method of 'YourComponent'.
This can be fixed by adding a key
attribute to the components, if manually adding these add it like:
return (
[<Comp1 key="0" />,
<Comp2 key="1" />]
)
Here is some more information on keys:Composition vs Inheritance
This is what worked for me :
Uri uri = Uri.parse("https://api.whatsapp.com/send?phone=" + "<number>" + "&text=" + "Hello WhatsApp!!");
Intent sendIntent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(sendIntent);
What I did to solve the problem was:
git pull origin [branch]
git push origin [branch]
Also make sure that you are pointing to the right branch by running:
git remote set-url origin [url]
process.on('exit', ..)
isn't called if the process crashes or is killed. It is only called when the event loop ends, and since server.close()
sort of ends the event loop (it still has to wait for currently running stacks here and there) it makes no sense to put that inside the exit event...
On crash, do process.on('uncaughtException', ..)
and on kill do process.on('SIGTERM', ..)
That being said, SIGTERM (default kill signal) lets the app clean up, while SIGKILL (immediate termination) won't let the app do anything.
Why do you need to? Attributes give extra information for reflection, but if you externally know which properties you want you don't need them.
You could store meta data externally relatively easily in a database or resource file.
Another reason to use object
over iframe is that object
sub resources (when an <object>
performs HTTP
requests) are considered as passive/display
in terms of Mixed content
, which means it's more secure when you must have Mixed content
.
Mixed content means that when you have https
but your resource is from http
.
Reference: https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content
in your projects build.gradle file... write as below.. i have solved that error by change the appcompat version from v7.23.0.0 to v7.22.2.1..
dependencies
{
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.1'
}
and If you want to set proxy for wget you should put these line in your Dockerfile
ENV http_proxy YOUR-PROXY-IP:PORT/
ENV https_proxy YOUR-PROXY-IP:PORT/
ENV all_proxy YOUR-PROXY-IP:PORT/
Use try
-catch
, even if it has an error it will still copy.
Try
Clipboard.SetText("copy me to clipboard")
Catch ex As Exception
End Try
If you use a message box to capture the exception, it will show you error, but the value is still copied to clipboard.
If you’re concerned about the file size of a PNG, you can use an SVG mask to create a transparent JPEG. Here is an example I put together.
PHP by itself has no SMS module or functions and doesn't allow you to send SMS.
SMS ( Short Messaging System) is a GSM technology an you need a GSM provider that will provide this service for you and may have an PHP API implementation for it.
Usually people in telecom business use Asterisk to handle calls and sms programming.
There are 2 causes:
1- store procedure name When you declare store procedure in code make sure you do not exec or execute keyword for example:
C#
string sqlstr="sp_getAllcustomers";// right way to declare it.
string sqlstr="execute sp_getAllCustomers";//wrong way and you will get that error message.
From this code:
MSDBHelp.ExecuteNonQuery(sqlconexec, CommandType.StoredProcedure, sqlexec);
CommandType.StoreProcedure
will look for only store procedure name and ExecuteNonQuery
will execute the store procedure behind the scene.
2- connection string:
Another cause is the wrong connection string. Look inside the connection string and make sure you have the connection especially the database name and so on.
You could make id
a series of comma-seperated values, like this:
index.php?id=1,2,3&name=john
Then, within your PHP code, explode it into an array:
$values = explode(",", $_GET["id"]);
print count($values) . " values passed.";
This will maintain brevity. The other (more commonly used with $_POST) method is to use array-style square-brackets:
index.php?id[]=1&id[]=2&id[]=3&name=john
But that clearly would be much more verbose.
I really wanted this (placeholders should look the same for text boxes as select boxes!) and straight CSS wasn't working in Chrome. Here is what I did:
First make sure your select tag has a .has-prompt
class.
Then initialize this class somewhere in document.ready
.
# Adds a class to select boxes that have prompt currently selected.
# Allows for placeholder-like styling.
# Looks for has-prompt class on select tag.
Mess.Views.SelectPromptStyler = Backbone.View.extend
el: 'body'
initialize: ->
@$('select.has-prompt').trigger('change')
events:
'change select.has-prompt': 'changed'
changed: (e) ->
select = @$(e.currentTarget)
if select.find('option').first().is(':selected')
select.addClass('prompt-selected')
else
select.removeClass('prompt-selected')
Then in CSS:
select.prompt-selected {
color: $placeholder-color;
}
I didn't know the existing sa password so this is what I did:
Open Services in Control Panel
Find the "SQL Server (SQLEXPRESS)" entry and select properties
Stop the service
Enter "-m" at the beginning of the "Start parameters" fields. If there are other parameters there already add a semi-colon after -m;
Start the service
Open a Command Prompt
Enter the command:
osql -S YourPcName\SQLEXPRESS -E
(change YourPcName to whatever your PC is called).
alter login sa enable go sp_password NULL,'new_password','sa' go quit
Stop the "SQL Server (SQLEXPRESS)" service
Remove the "-m" from the Start parameters field
Start the service
http://developer.android.com/reference/android/content/Context.html#BIND_ABOVE_CLIENT
public static final int BIND_ABOVE_CLIENT -- Added in API level 14
Flag for bindService(Intent, ServiceConnection, int)
: indicates that the client application binding to this service considers the service to be more important than the app itself. When set, the platform will try to have the out of memory killer kill the app before it kills the service it is bound to, though this is not guaranteed to be the case.
Other flags of the same group are: BIND_ADJUST_WITH_ACTIVITY, BIND_AUTO_CREATE, BIND_IMPORTANT, BIND_NOT_FOREGROUND, BIND_WAIVE_PRIORITY.
Note that the meaning of BIND_AUTO_CREATE has changed in ICS, and
old applications that don't specify BIND_AUTO_CREATE
will automatically have the flags BIND_WAIVE_PRIORITY
and BIND_ADJUST_WITH_ACTIVITY
set for them.
In that case, it's not needed. No extra threads will have been started up, you're not changing the exit code (which defaults to 0) - basically it's pointless.
When the docs say the method never returns normally, it means the subsequent line of code is effectively unreachable, even though the compiler doesn't know that:
System.exit(0);
System.out.println("This line will never be reached");
Either an exception will be thrown, or the VM will terminate before returning. It will never "just return".
It's very rare to be worth calling System.exit()
IME. It can make sense if you're writing a command line tool, and you want to indicate an error via the exit code rather than just throwing an exception... but I can't remember the last time I used it in normal production code.
I do this with javascript (no library) and CSS - the table body scrolls with the page, and the table does not have to be fixed width or height, although each column must have a width. You can also keep sorting functionality.
Basically:
In HTML, create container divs to position the table header row and the table body, also create a "mask" div to hide the table body as it scrolls past the header
In CSS, convert the table parts to blocks
In Javascript, get the table width and match the mask's width... get the height of the page content... measure scroll position... manipulate CSS to set the table header row position and the mask height
Here's the javascript and a jsFiddle DEMO.
// get table width and match the mask width
function setMaskWidth() {
if (document.getElementById('mask') !==null) {
var tableWidth = document.getElementById('theTable').offsetWidth;
// match elements to the table width
document.getElementById('mask').style.width = tableWidth + "px";
}
}
function fixTop() {
// get height of page content
function getScrollY() {
var y = 0;
if( typeof ( window.pageYOffset ) == 'number' ) {
y = window.pageYOffset;
} else if ( document.body && ( document.body.scrollTop) ) {
y = document.body.scrollTop;
} else if ( document.documentElement && ( document.documentElement.scrollTop) ) {
y = document.documentElement.scrollTop;
}
return [y];
}
var y = getScrollY();
var y = y[0];
if (document.getElementById('mask') !==null) {
document.getElementById('mask').style.height = y + "px" ;
if (document.all && document.querySelector && !document.addEventListener) {
document.styleSheets[1].rules[0].style.top = y + "px" ;
} else {
document.styleSheets[1].cssRules[0].style.top = y + "px" ;
}
}
}
window.onscroll = function() {
setMaskWidth();
fixTop();
}
I needed to do replicate these heights properly in a pre-ICS compatibility app and dug into the framework core source. Both answers above are sort of correct.
It basically boils down to using qualifiers. The height is defined by the dimension "action_bar_default_height"
It is defined to 48dip for default. But for -land it is 40dip and for sw600dp it is 56dip.
var myProp = 'prop';
if(myObj.hasOwnProperty(myProp)){
alert("yes, i have that property");
}
Or
var myProp = 'prop';
if(myProp in myObj){
alert("yes, i have that property");
}
Or
if('prop' in myObj){
alert("yes, i have that property");
}
Note that hasOwnProperty
doesn't check for inherited properties, whereas in
does. For example 'constructor' in myObj
is true, but myObj.hasOwnProperty('constructor')
is not.
My answer comes from here
You can make a derived class, which will set the timeout property of the base WebRequest
class:
using System;
using System.Net;
public class WebDownload : WebClient
{
/// <summary>
/// Time in milliseconds
/// </summary>
public int Timeout { get; set; }
public WebDownload() : this(60000) { }
public WebDownload(int timeout)
{
this.Timeout = timeout;
}
protected override WebRequest GetWebRequest(Uri address)
{
var request = base.GetWebRequest(address);
if (request != null)
{
request.Timeout = this.Timeout;
}
return request;
}
}
and you can use it just like the base WebClient class.
Another approach to addressing the issue of multiple keys with the same min value:
>>> dd = {320:1, 321:0, 322:3, 323:0}
>>>
>>> from itertools import groupby
>>> from operator import itemgetter
>>>
>>> print [v for k,v in groupby(sorted((v,k) for k,v in dd.iteritems()), key=itemgetter(0)).next()[1]]
[321, 323]
Without knowing your compiler, no one can give you specific, step by step instructions, but the basic procedure is as follows:
Specify the path which should be searched in order to find the actual library (usually under Library Search Paths, Library Directories, etc. in the properties page)
Under linker options, specify the actual name of the library. In VS, you would write Allegro.lib (or whatever it is), on Linux you usually just write Allegro (prefixes/suffixes are added automatically in most cases). This is usually under "Libraries->Input", just "Libraries", or something similar.
Ensure that you have included the headers for the library and make sure that they can be found (similar process to that listed in step #1 and #2). If it is a static library, you should be good; if it's a DLL, you need to copy it in your project.
Mash the build button.
I just solved it this way
Html:
<div class="custom-file">
<input id="logo" type="file" class="custom-file-input">
<label for="logo" class="custom-file-label text-truncate">Choose file...</label>
</div>
JS:
$('.custom-file-input').on('change', function() {
let fileName = $(this).val().split('\\').pop();
$(this).next('.custom-file-label').addClass("selected").html(fileName);
});
Note: Thanks to ajax333221 for mentioning the .text-truncate
class that will hide the overflow within label if the selected file name is too long.
Try this so you don't need to worry about where your logs are:
dmesg -T | egrep -i 'killed process'
-T
- readable timestamps
If you know exactly which frames to extract, eg 1, 200, 400, 600, 800, 1000, try using:
select='eq(n\,1)+eq(n\,200)+eq(n\,400)+eq(n\,600)+eq(n\,800)+eq(n\,1000)' \
-vsync vfr -q:v 2
I'm using this with a pipe to Imagemagick's montage to get 10 frames preview from any videos. Obviously the frame numbers you'll need to figure out using ffprobe
ffmpeg -i myVideo.mov -vf \
select='eq(n\,1)+eq(n\,200)+eq(n\,400)+eq(n\,600)+eq(n\,800)+eq(n\,1000)',scale=320:-1 \
-vsync vfr -q:v 2 -f image2pipe -vcodec ppm - \
| montage -tile x1 -geometry "1x1+0+0<" -quality 100 -frame 1 - output.png
.
Little explanation:
+
stands for OR and *
for AND\,
is simply escaping the ,
character-vsync vfr -q:v 2
it doesn't seem to work but I don't know why - anyone?This question is vague, but if you want to make the image with Javascript. It is simple.
function loadImages(src) {
if (document.images) {
img1 = new Image();
img1.src = src;
}
loadImages("image.jpg");
The image will be requested but until you show it it will never be displayed. great for pre loading images you expect to be requests but delaying it until the document is loaded.
s[0:"s".index("&")]
what does this do:
Something like this would resemble a button:
a.LinkButton {
border-style: solid;
border-width : 1px 1px 1px 1px;
text-decoration : none;
padding : 4px;
border-color : #000000
}
See http://jsfiddle.net/r7v5c/1/ for an example.
>>> import datetime
>>> now = datetime.datetime.now()
>>> now.strftime("%B %d, %Y")
'July 23, 2010'
add the library under COM object for window media player then type your code where you want
Source:
WMPLib.WindowsMediaPlayer wplayer = new WMPLib.WindowsMediaPlayer();
wplayer.URL = @"C:\Users\Adil M\Documents\Visual Studio 2012\adil.mp3";
wplayer.controls.play();
CSS only
line-height: 1.5;
white-space: normal;
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
Here is the PowerShell script using msiexec:
echo "Getting product code"
$ProductCode = Get-WmiObject win32_product -Filter "Name='Name of my Software in Add Remove Program Window'" | Select-Object -Expand IdentifyingNumber
echo "removing Product"
# Out-Null argument is just for keeping the power shell command window waiting for msiexec command to finish else it moves to execute the next echo command
& msiexec /x $ProductCode | Out-Null
echo "uninstallation finished"
Shaker.java
import java.util.ArrayList;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class Shaker implements SensorEventListener{
private static final String SENSOR_SERVICE = Context.SENSOR_SERVICE;
private SensorManager sensorMgr;
private Sensor mAccelerometer;
private boolean accelSupported;
private long timeInMillis;
private long threshold;
private OnShakerTreshold listener;
ArrayList<Float> valueStack;
public Shaker(Context context, OnShakerTreshold listener, long timeInMillis, long threshold) {
try {
this.timeInMillis = timeInMillis;
this.threshold = threshold;
this.listener = listener;
if (timeInMillis<100){
throw new Exception("timeInMillis < 100ms");
}
valueStack = new ArrayList<Float>((int)(timeInMillis/100));
sensorMgr = (SensorManager) context.getSystemService(SENSOR_SERVICE);
mAccelerometer = sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
} catch (Exception e){
e.printStackTrace();
}
}
public void start() {
try {
accelSupported = sensorMgr.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_GAME);
if (!accelSupported) {
stop();
throw new Exception("Sensor is not supported");
}
} catch (Exception e){
e.printStackTrace();
}
}
public void stop(){
try {
sensorMgr.unregisterListener(this, mAccelerometer);
} catch (Exception e){
e.printStackTrace();
}
}
@Override
protected void finalize() throws Throwable {
try {
stop();
} catch (Exception e){
e.printStackTrace();
}
super.finalize();
}
long lastUpdate = 0;
private float last_x;
private float last_y;
private float last_z;
public void onSensorChanged(SensorEvent event) {
try {
if (event.sensor == mAccelerometer) {
long curTime = System.currentTimeMillis();
if ((curTime-lastUpdate)>getNumberOfMeasures()){
lastUpdate = System.currentTimeMillis();
float[] values = event.values;
if (valueStack.size()>(int)getNumberOfMeasures())
valueStack.remove(0);
float x = (int)(values[SensorManager.DATA_X]);
float y = (int)(values[SensorManager.DATA_Y]);
float z = (int)(values[SensorManager.DATA_Z]);
float speed = Math.abs((x+y+z) - (last_x + last_y + last_z));
valueStack.add(speed);
String posText = String.format("X:%4.0f Y:%4.0f Z:%4.0f", (x-last_x), (y-last_y), (z-last_z));
last_x = (x);
last_y = (y);
last_z = (z);
float sumOfValues = 0;
float avgOfValues = 0;
for (float f : valueStack){
sumOfValues = (sumOfValues+f);
}
avgOfValues = sumOfValues/(int)getNumberOfMeasures();
if (avgOfValues>=threshold){
listener.onTreshold();
valueStack.clear();
}
System.out.println(String.format("M: %+4d A: %5.0f V: %4.0f %s", valueStack.size(),avgOfValues,speed,posText));
}
}
} catch (Exception e){
e.printStackTrace();
}
}
private long getNumberOfMeasures() {
return timeInMillis/100;
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {}
public interface OnShakerTreshold {
public void onTreshold();
}
}
MainActivity.java
public class MainActivity extends Activity implements OnShakerTreshold{
private Shaker s;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
s = new Shaker(getApplicationContext(), this, 5000, 20);
// 5000 = 5 second of shaking
// 20 = minimal threshold (very angry shaking :D)
// beware screen rotation reset counter
}
@Override
protected void onResume() {
s.start();
super.onResume();
}
@Override
protected void onPause() {
s.stop();
super.onPause();
}
public void onTreshold() {
System.out.println("FIRE LISTENER");
RingtoneManager.getRingtone(getApplicationContext(), RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)).play();
}
}
Have fun.
One solution would be to pipe your command from PowerShell to CMD. Running the following command will pipe the notepad.exe
command over to CMD, which will then open the Notepad application.
PS C:\> "notepad.exe" | cmd
Once the command has run in CMD, you will be returned to a PowerShell prompt, and can continue running your PowerShell script.
As mklement0 points out, this method shows CMD's startup message. If you were to copy the output using the method above into another terminal, the startup message will be copied along with it.
From MySQL 5.7 onwards, this is possible, but requires first enabling the mdl
instrument in the performance_schema.setup_instruments
table. You can do this temporarily (until the server is next restarted) by running:
UPDATE performance_schema.setup_instruments
SET enabled = 'YES'
WHERE name = 'wait/lock/metadata/sql/mdl';
Or permanently, by adding the following incantation to the [mysqld]
section of your my.cnf
file (or whatever config files MySQL reads from on your installation):
[mysqld]
performance_schema_instrument = 'wait/lock/metadata/sql/mdl=ON'
(Naturally, MySQL will need to be restarted to make the config change take effect if you take the latter approach.)
Locks you take out after the mdl
instrument has been enabled can be seen by running a SELECT
against the performance_schema.metadata_locks
table. As noted in the docs, GET_LOCK
locks have an OBJECT_TYPE
of 'USER LEVEL LOCK'
, so we can filter our query down to them with a WHERE
clause:
mysql> SELECT GET_LOCK('foobarbaz', -1);
+---------------------------+
| GET_LOCK('foobarbaz', -1) |
+---------------------------+
| 1 |
+---------------------------+
1 row in set (0.00 sec)
mysql> SELECT * FROM performance_schema.metadata_locks
-> WHERE OBJECT_TYPE='USER LEVEL LOCK'
-> \G
*************************** 1. row ***************************
OBJECT_TYPE: USER LEVEL LOCK
OBJECT_SCHEMA: NULL
OBJECT_NAME: foobarbaz
OBJECT_INSTANCE_BEGIN: 139872119610944
LOCK_TYPE: EXCLUSIVE
LOCK_DURATION: EXPLICIT
LOCK_STATUS: GRANTED
SOURCE: item_func.cc:5482
OWNER_THREAD_ID: 35
OWNER_EVENT_ID: 3
1 row in set (0.00 sec)
mysql>
The meanings of the columns in this result are mostly adequately documented at https://dev.mysql.com/doc/refman/en/metadata-locks-table.html, but one point of confusion is worth noting: the OWNER_THREAD_ID
column does not contain the connection ID (like would be shown in the PROCESSLIST
or returned by CONNECTION_ID()
) of the thread that holds the lock. Confusingly, the term "thread ID" is sometimes used as a synonym of "connection ID" in the MySQL documentation, but this is not one of those times. If you want to determine the connection ID of the connection that holds a lock (for instance, in order to kill that connection with KILL
), you'll need to look up the PROCESSLIST_ID
that corresponds to the THREAD_ID
in the performance_schema.threads
table. For instance, to kill the connection that was holding my lock above...
mysql> SELECT OWNER_THREAD_ID FROM performance_schema.metadata_locks
-> WHERE OBJECT_TYPE='USER LEVEL LOCK'
-> AND OBJECT_NAME='foobarbaz';
+-----------------+
| OWNER_THREAD_ID |
+-----------------+
| 35 |
+-----------------+
1 row in set (0.00 sec)
mysql> SELECT PROCESSLIST_ID FROM performance_schema.threads
-> WHERE THREAD_ID=35;
+----------------+
| PROCESSLIST_ID |
+----------------+
| 10 |
+----------------+
1 row in set (0.00 sec)
mysql> KILL 10;
Query OK, 0 rows affected (0.00 sec)
In simple, Normalisation is Reduction of Redundancies.
Examples of Redundancies:
a) white spaces outside of the root/document tags(...<document></document>...)
b) white spaces within start tag (<...>) and end tag (</...>)
c) white spaces between attributes and their values (ie. spaces between key name and =")
d) superfluous namespace declarations
e) line breaks/white spaces in texts of attributes and tags
f) comments etc...
in accord with Laravel documentation, I create in app/Http/Controllers/Auth/LoginController.php the following method :
protected function redirectTo()
{
$user=Auth::user();
if($user->account_type == 1){
return '/admin';
}else{
return '/home';
}
}
to get the user information from my db I used "Illuminate\Support\Facades\Auth;".
I have used the below code in my existing project
<div class="form-group" [ngStyle]="{'border':isSubmitted && form_data.controls.first_name.errors?'1px solid red':'' }">
</div>
Define set
a = set()
Use add to append single values
a.add(1)
a.add(2)
Use update to add elements from tuples, sets, lists or frozen-sets
a.update([3,4])
>> print(a)
{1, 2, 3, 4}
If you want to add a tuple or frozen-set itself, use add
a.add((5, 6))
>> print(a)
{1, 2, 3, 4, (5, 6)}
Note: Since set elements must be hashable, and lists are considered mutable, you cannot add a list to a set. You also cannot add other sets to a set. You can however, add the elements from lists and sets as demonstrated with the ".update" method.
If others who view this question only have a JSON string (not in an object), then you can put it into a HashMap
and still get the ObjectMapper
to work. The result
variable is your JSON string.
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.HashMap;
import java.util.Map;
// Pretty-print the JSON result
try {
ObjectMapper objectMapper = new ObjectMapper();
Map<String, Object> response = objectMapper.readValue(result, HashMap.class);
System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(response));
} catch (JsonParseException e) {
e.printStackTrace();
} catch (JsonMappingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Two things you can do:
git checkout -b sillyname
git commit -am "silly message"
git checkout -
or
git stash -u
git branch sillyname stash@{0}
(git checkout -
<-- the dash is a shortcut for the previous branch you were on )
(git stash -u
<-- the -u
means that it also takes unstaged changes )
First Create Procedure as Below:
CREATE DEFINER=`root`@`%` PROCEDURE `sp_split`(str nvarchar(6500), dilimiter varchar(15), tmp_name varchar(50))
BEGIN
declare end_index int;
declare part nvarchar(6500);
declare remain_len int;
set end_index = INSTR(str, dilimiter);
while(end_index != 0) do
/* Split a part */
set part = SUBSTRING(str, 1, end_index - 1);
/* insert record to temp table */
call `sp_split_insert`(tmp_name, part);
set remain_len = length(str) - end_index;
set str = substring(str, end_index + 1, remain_len);
set end_index = INSTR(str, dilimiter);
end while;
if(length(str) > 0) then
/* insert record to temp table */
call `sp_split_insert`(tmp_name, str);
end if;
END
After that create procedure as below:
CREATE DEFINER=`root`@`%` PROCEDURE `sp_split_insert`(tb_name varchar(255), tb_value nvarchar(6500))
BEGIN
SET @sql = CONCAT('Insert Into ', tb_name,'(item) Values(?)');
PREPARE s1 from @sql;
SET @paramA = tb_value;
EXECUTE s1 USING @paramA;
END
How call test
CREATE DEFINER=`root`@`%` PROCEDURE `test_split`(test_text nvarchar(255))
BEGIN
create temporary table if not exists tb_search
(
item nvarchar(6500)
);
call sp_split(test_split, ',', 'tb_search');
select * from tb_search where length(trim(item)) > 0;
drop table tb_search;
END
call `test_split`('Apple,Banana,Mengo');
Demo :
<connectionStrings>
<add name="myConnectionString" connectionString="server=localhost;database=myDb;uid=myUser;password=myPass;" />
</connectionStrings>
Based on your question:
<connectionStrings>
<add name="itmall" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True" />
</connectionStrings>
Refer links:
http://www.connectionstrings.com/store-connection-string-in-webconfig/
Retrive connection string from web.config file:
write the below code in your file where you want;
string connstring=ConfigurationManager.ConnectionStrings["itmall"].ConnectionString;
SqlConnection con = new SqlConnection(connstring);
or you can go in your way like
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["itmall"].ConnectionString);
Note:
The "name" which you gave in web.config file and name which you used in connection string must be same(like "itmall" in this solution.)
Use NetworkCredential
Yep, just add these two lines to your code.
var credentials = new System.Net.NetworkCredential("username", "password");
client.Credentials = credentials;
I agree with the sentiment in the comments above — this can be pretty annoying. We can only hope you give the user the option to turn the music off.
However...
audio { display:none;}
_x000D_
<audio autoplay="true" src="https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg">
_x000D_
The css hides the audio
element, and the autoplay="true"
plays it automatically.
Please look at this document
http://www.socialsecurity.gov/employer/randomization.html
The SSA is instituting a new policy the where all previously unused sequences are will be available for use.
Goes into affect June 25, 2011.
Taken from the new FAQ:
What changes will result from randomization?
The SSA will eliminate the geographical significance of the first three digits of the SSN, currently referred to as the area number, by no longer allocating the area numbers for assignment to individuals in specific states. The significance of the highest group number (the fourth and fifth digits of the SSN) for validation purposes will be eliminated. Randomization will also introduce previously unassigned area numbers for assignment excluding area numbers 000, 666 and 900-999. Top
Will SSN randomization assign group number (the fourth and fifth digits of the SSN) 00 or serial number (the last four digits of the SSN) 0000?
SSN randomization will not assign group number 00 or serial number 0000. SSNs containing group number 00 or serial number 0000 will continue to be invalid.
Here's a paper on how these numbers (or similar ones) were derived:
For my scenario, I found that there was a identity node in the web.config file.
<identity impersonate="true" userName="blah" password="blah">
When I removed the userName and password parameters from node, it started working.
Another option might be that you need to make sure that the specified userName has access to work with those "Temporary ASP.NET Files" folders found in the various C:\Windows\Microsoft.NET\Framework{version} folders.
Hoping this helps someone else out!
Simply use Contains method. Note that it works based on the equality function Equals
bool alreadyExist = list.Contains(item);
You can use the function numpy.nonzero()
, or the nonzero()
method of an array
import numpy as np
A = np.array([[2,4],
[6,2]])
index= np.nonzero(A>1)
OR
(A>1).nonzero()
Output:
(array([0, 1]), array([1, 0]))
First array in output depicts the row index and second array depicts the corresponding column index.
Using pathlib you can get the folder in which the current file is located. __file__
is the pathname of the file from which the module was loaded.
Ref: docs
import pathlib
current_dir = pathlib.Path(__file__).parent
current_file = pathlib.Path(__file__)
Doc ref: link
To answer the question of going from an existing python datetime to a pandas Timestamp do the following:
import time, calendar, pandas as pd
from datetime import datetime
def to_posix_ts(d: datetime, utc:bool=True) -> float:
tt=d.timetuple()
return (calendar.timegm(tt) if utc else time.mktime(tt)) + round(d.microsecond/1000000, 0)
def pd_timestamp_from_datetime(d: datetime) -> pd.Timestamp:
return pd.to_datetime(to_posix_ts(d), unit='s')
dt = pd_timestamp_from_datetime(datetime.now())
print('({}) {}'.format(type(dt), dt))
Output:
(<class 'pandas._libs.tslibs.timestamps.Timestamp'>) 2020-09-05 23:38:55
I was hoping for a more elegant way to do this but the to_posix_ts
is already in my standard tool chain so I'm moving on.
An alternative way can be this: - recommended as using just one expression -
case when address.country <> '' then address.country
else 'United States'
end as country
Note: Result of checking
null
by<>
operator will returnfalse
.
And as documented:NULLIF
is equivalent to a searchedCASE
expression
andCOALESCE
expression is a syntactic shortcut for theCASE
expression.
So, combination of those are using two time ofcase
expression.
For React Native
applications while running in debug add the xml block
mentioned by @Xenolion to react_native_config.xml
located in <project>/android/app/src/debug/res/xml
Similar to the following snippet:
<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
<domain-config cleartextTrafficPermitted="true">
<domain includeSubdomains="false">localhost</domain>
<domain includeSubdomains="false">10.0.2.2</domain>
<domain includeSubdomains="false">10.0.3.2</domain>
</domain-config>
<base-config cleartextTrafficPermitted="true">
<trust-anchors>
<certificates src="system" />
</trust-anchors>
</base-config>
</network-security-config>
After days trying to find the answer, I finally found
display: table;
There was surprisingly very little information available online about how to actually getting it to work, even here, so on to the "How":
To use this fantastic piece of code, you need to think back to when tables were the only real way to structure HTML, namely the syntax. To get a table with 2 rows and 3 columns, you'd have to do the following:
<table>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
</tr>
</table>
Similarly to get CSS to do it, you'd use the following:
<div id="table">
<div class="tr">
<div class="td"></div>
<div class="td"></div>
<div class="td"></div>
</div>
<div class="tr">
<div class="td"></div>
<div class="td"></div>
<div class="td"></div>
</div>
</div>
#table{
display: table;
}
.tr{
display: table-row;
}
.td{
display: table-cell; }
As you can see in the JSFiddle example below, the divs in the 3rd column have no content, yet are respecting the auto height set by the text in the first 2 columns. WIN!
http://jsfiddle.net/blyzz/1djs97yv/1/
It's worth noting that display: table;
does not work in IE6 or 7 (thanks, FelipeAls), so depending on your needs with regards to browser compatibility, this may not be the answer that you are seeking.
I recently discovered Schaun Wheeler's function for importing excel files into R after realising that the xlxs package hadn't been updated for R 3.1.0.
https://gist.github.com/schaunwheeler/5825002
The file name needs to have the ".xlsx" extension and the file can't be open when you run the function.
This function is really useful for accessing other peoples work. The main advantages over using the read.csv function are when
Using the read.csv function requires manual opening and saving of each Excel document which is time consuming and very boring. Using Schaun's function to automate the workflow is therefore a massive help.
Big props to Schaun for this solution.
**403 Forbidden **
You don't have permission to access /Folder-Name/ on this server**
The solution for this problem is:
1.go to etc/apache2/apache2.conf
2.find the below code and change AllowOverride all to AllowOverride none
<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride all Change this to---> AllowOverride none
Require all granted
</Directory>
It will work fine on your Ubuntu server
In addition to Alexander Lunas answer ... If you want to add more than one argument just use:
<Route path="/details/:id/:title" component={DetailsPage}/>
export default class DetailsPage extends Component {
render() {
return(
<div>
<h2>{this.props.match.params.id}</h2>
<h3>{this.props.match.params.title}</h3>
</div>
)
}
}
A little late to the party, but I think regular expressions are not the right tool for the job.
The problem is that you'll come across edge cases which would add extranous complexity to the regular expression. @est mentioned an example line:
for (int i = 0; i < 10; doSomethingTo("("));
This string literal contains an (unbalanced!) parenthesis, which breaks the logic. Apparently, you must ignore contents of string literals. In order to do this, you must take the double quotes into account. But string literals itself can contain double quotes. For instance, try this:
for (int i = 0; i < 10; doSomethingTo("\"(\\"));
If you address this using regular expressions, it'll add even more complexity to your pattern.
I think you are better off parsing the language. You could, for instance, use a language recognition tool like ANTLR. ANTLR is a parser generator tool, which can also generate a parser in Python. You must provide a grammar defining the target language, in your case C++. There are already numerous grammars for many languages out there, so you can just grab the C++ grammar.
Then you can easily walk the parser tree, searching for empty statements as while
or for
loop body.
Something like this?
<!DOCTYPE html>
<html>
<head>
<style>
form * {
display: block;
margin: 10px;
}
</style>
<script language="Javascript" >
function download(filename, text) {
var pom = document.createElement('a');
pom.setAttribute('href', 'data:text/plain;charset=utf-8,' +
encodeURIComponent(text));
pom.setAttribute('download', filename);
pom.style.display = 'none';
document.body.appendChild(pom);
pom.click();
document.body.removeChild(pom);
}
</script>
</head>
<body>
<form onsubmit="download(this['name'].value, this['text'].value)">
<input type="text" name="name" value="test.txt">
<textarea rows=3 cols=50 name="text">Please type in this box. When you
click the Download button, the contents of this box will be downloaded to
your machine at the location you specify. Pretty nifty. </textarea>
<input type="submit" value="Download">
</form>
</body>
</html>
For gitlab v10+ (as of Sept 2018), this has moved to settings-> repository -> default branch
As stated by @Luke this is still valid as on 4/1/2021
Use a slice, not an arrray. Just create it using
reg := []string {"a","b","c"}
An alternative would have been to convert your array to a slice when joining :
fmt.Println(strings.Join(reg[:],","))
Read the Go blog about the differences between slices and arrays.
In my case, because I had reinstalled iis, I needed to register iis with dot net 4 using this command:
C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
If you will be processing all pages in order then simply remembering the last key value seen on the previous page and using TOP (25) ... WHERE Key > @last_key ORDER BY Key
can be the best performing method if suitable indexes exist to allow this to be seeked efficiently - or an API cursor if they don't.
For selecting an arbitary page the best solution for SQL Server 2005 - 2008 R2 is probably ROW_NUMBER
and BETWEEN
For SQL Server 2012+ you can use the enhanced ORDER BY clause for this need.
SELECT *
FROM MyTable
ORDER BY OrderingColumn ASC
OFFSET 50 ROWS
FETCH NEXT 25 ROWS ONLY
Though it remains to be seen how well performing this option will be.
You can use define window.myvar = {}
.
When you want to use it, you can use like window.myvar = 1
DateTime dateForButton = DateTime.Now.AddDays(-1);
I've tried a some of the solutions in this thread, and unfortunately, I found some of them to be cumbersome (i.e. requiring excessive effort when doing something non-trivial) and inelegant. Consequently, I thought I'd throw my preferred solution, web2py HTML helper objects, into the mix.
First, install the the standalone web2py module:
pip install web2py
Unfortunately, the above installs an extremely antiquated version of web2py, but it'll be good enough for this example. The updated source is here.
Import web2py HTML helper objects documented here.
from gluon.html import *
Now, you can use web2py helpers to generate XML/HTML.
words = ['this', 'is', 'my', 'item', 'list']
# helper function
create_item = lambda idx, word: LI(word, _id = 'item_%s' % idx, _class = 'item')
# create the HTML
items = [create_item(idx, word) for idx,word in enumerate(words)]
ul = UL(items, _id = 'my_item_list', _class = 'item_list')
my_div = DIV(ul, _class = 'container')
>>> my_div
<gluon.html.DIV object at 0x00000000039DEAC8>
>>> my_div.xml()
# I added the line breaks for clarity
<div class="container">
<ul class="item_list" id="my_item_list">
<li class="item" id="item_0">this</li>
<li class="item" id="item_1">is</li>
<li class="item" id="item_2">my</li>
<li class="item" id="item_3">item</li>
<li class="item" id="item_4">list</li>
</ul>
</div>
I had this error message show up for me because I was using the network on the main thread and new versions of Android have a "strict" policy to prevent that. To get around it just throw whatever network connection call into an AsyncTask.
Example:
AsyncTask<CognitoCachingCredentialsProvider, Integer, Void> task = new AsyncTask<CognitoCachingCredentialsProvider, Integer, Void>() {
@Override
protected Void doInBackground(CognitoCachingCredentialsProvider... params) {
AWSSessionCredentials creds = credentialsProvider.getCredentials();
String id = credentialsProvider.getCachedIdentityId();
credentialsProvider.refresh();
Log.d("wooohoo", String.format("id=%s, token=%s", id, creds.getSessionToken()));
return null;
}
};
task.execute(credentialsProvider);
The easiest way is to set your repository to the branch you want to merge with, and then run
git checkout [branch with file] [path to file you would like to merge]
If you run
git status
you will see the file already staged...
Then run
git commit -m "Merge changes on '[branch]' to [file]"
Simple.
Here's a simple SQL that updates Mid_Name on the Name3 table using the Middle_Name field from Name:
update name3
set mid_name = name.middle_name
from name
where name3.person_id = name.person_id;
There's the !=
(not equal) operator that returns True
when two values differ, though be careful with the types because "1" != 1
. This will always return True and "1" == 1
will always return False, since the types differ. Python is dynamically, but strongly typed, and other statically typed languages would complain about comparing different types.
There's also the else
clause:
# This will always print either "hi" or "no hi" unless something unforeseen happens.
if hi == "hi": # The variable hi is being compared to the string "hi", strings are immutable in Python, so you could use the 'is' operator.
print "hi" # If indeed it is the string "hi" then print "hi"
else: # hi and "hi" are not the same
print "no hi"
The is
operator is the object identity operator used to check if two objects in fact are the same:
a = [1, 2]
b = [1, 2]
print a == b # This will print True since they have the same values
print a is b # This will print False since they are different objects.
Generally it happens, because some browsers settings or plug-ins directly open PDF in the same window like a simple web page.
The following might help you. I have done it in PHP a few years back. But currently I'm not working on that platform.
<?php
if (isset($_GET['file'])) {
$file = $_GET['file'];
if (file_exists($file) && is_readable($file) && preg_match('/\.pdf$/',$file)) {
header('Content-type: application/pdf');
header("Content-Disposition: attachment; filename=\"$file\"");
readfile($file);
}
}
else {
header("HTTP/1.0 404 Not Found");
echo "<h1>Error 404: File Not Found: <br /><em>$file</em></h1>";
}
?>
Save the above as download.php.
Save this little snippet as a PHP file somewhere on your server and you can use it to make a file download in the browser, rather than display directly. If you want to serve files other than PDF, remove or edit line 5.
You can use it like so:
Add the following link to your HTML file.
<a href="download.php?file=my_pdf_file.pdf">Download the cool PDF.</a>
Reference from: This blog
For Java 8 ....
There is a good solution at https://stackoverflow.com/a/36315051/2648077 post.
This uses Java 8 Supplier
functional interface
I found @bigleftie's comment above very helpful: "Four things must match
In my case, in the project properties, Java compiler, the JDK compliance was set to use the workspace settings, which were different from the java version for the project. I clicked on 'Configure Workspace Settings', and changed the workspace Compiler compliance level to what I wanted, and the problem was resolved.
Take a look at strcasecmp()
in strings.h
.
git checkout [branchYouWantToReceiveBranch]
- checkout branch you want to receive branchgit merge [branchYouWantToMergeIntoBranch]
As of BeautifulSoup 4+ ,
If you have a single class name , you can just pass the class name as parameter like :
mydivs = soup.find_all('div', 'class_name')
Or if you have more than one class names , just pass the list of class names as parameter like :
mydivs = soup.find_all('div', ['class1', 'class2'])
You should use this:
<Link to={this.props.myroute} onClick={hello}>Here</Link>
Or (if method hello
lays at this class):
<Link to={this.props.myroute} onClick={this.hello}>Here</Link>
Update: For ES6 and latest if you want to bind some param with click method, you can use this:
const someValue = 'some';
....
<Link to={this.props.myroute} onClick={() => hello(someValue)}>Here</Link>
Came from Google here with a solution for High Sierra.
Something changed in the networking setup of macos and some apps (including ping) cannot resolve localhost.
Editing /etc/hosts seems like a fix:
cmd: sudo nano /etc/hosts/
content 127.0.0.1 localhost
Or simply (if you're sure your /etc/hosts is empty)
sudo echo '127.0.0.1 localhost' > /etc/hosts
With C++11 you can now do
struct std::tm tm;
std::istringstream ss("16:35:12");
ss >> std::get_time(&tm, "%H:%M:%S"); // or just %T in this case
std::time_t time = mktime(&tm);
see std::get_time and strftime for reference
sudo chown -R $(whoami) /usr/local
would do just fine as mentioned in the brew site troubleshooting
You could always do $('input[name="somename"]')
From memory, you call stringstream::str()
to get the std::string
value out.
You need to put them both in some container element and then apply the alignment on it.
For example:
.formfield * {_x000D_
vertical-align: middle;_x000D_
}
_x000D_
<p class="formfield">_x000D_
<label for="textarea">Label for textarea</label>_x000D_
<textarea id="textarea" rows="5">Textarea</textarea>_x000D_
</p>
_x000D_
For ASP.NET 1.1, this is still due to someone posting more than 1000 form fields, but the setting must be changed in the registry rather than a config file. It should be added as a DWORD named MaxHttpCollectionKeys in the registry under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ASP.NET\1.1.4322.0
for 32-bit editions of Windows, and
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\ASP.NET\1.1.4322.0
for 64-bit editions of Windows.
Instead of entering "EST" for the timezone you can enter "EST5EDT" as such. As you noted, just "EDT" does not work. This will account for the daylight savings time issue. The code line looks like this:
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("EST5EDT"));
if (text[0] == '\0')
{
/* Code... */
}
Use this if you're coding for micro-controllers with little space on flash and/or RAM. You will waste a lot more flash using strlen
than checking the first byte.
The above example is the fastest and less computation is required.
If you have to work with file-stream (so no physically saved PDF) like we do and you want to download the PDF without page-reload, the following function works for us:
HTML
<div id="download-helper-hidden-container" style="display:none">
<form id="download-helper-form" target="pdf-download-output" method="post">
<input type="hidden" name="downloadHelperTransferData" id="downloadHelperTransferData" />
</form>
<iframe id="pdf-helper-output" name="pdf-download-output"></iframe>
</div>
Javascript
var form = document.getElementById('download-helper-form');
$("#downloadHelperTransferData").val(transferData);
form.action = "ServerSideFunctionWhichWritesPdfBytesToResponse";
form.submit();
Due to the target="pdf-download-output", the response is written into the iframe and therefore no page reload is executed, but the pdf-response-stream is output in the browser as a download.
You go around making your webpage, and keep on putting {{data bindings}} whenever you feel you would have dynamic data. Angular will then provide you a $scope handler, which you can populate (statically or through calls to the web server).
This is a good understanding of data-binding. I think you've got that down.
For simple DOM manipulation, which doesnot involve data manipulation (eg: color changes on mousehover, hiding/showing elements on click), jQuery or old-school js is sufficient and cleaner. This assumes that the model in angular's mvc is anything that reflects data on the page, and hence, css properties like color, display/hide, etc changes dont affect the model.
I can see your point here about "simple" DOM manipulation being cleaner, but only rarely and it would have to be really "simple". I think DOM manipulation is one the areas, just like data-binding, where Angular really shines. Understanding this will also help you see how Angular considers its views.
I'll start by comparing the Angular way with a vanilla js approach to DOM manipulation. Traditionally, we think of HTML as not "doing" anything and write it as such. So, inline js, like "onclick", etc are bad practice because they put the "doing" in the context of HTML, which doesn't "do". Angular flips that concept on its head. As you're writing your view, you think of HTML as being able to "do" lots of things. This capability is abstracted away in angular directives, but if they already exist or you have written them, you don't have to consider "how" it is done, you just use the power made available to you in this "augmented" HTML that angular allows you to use. This also means that ALL of your view logic is truly contained in the view, not in your javascript files. Again, the reasoning is that the directives written in your javascript files could be considered to be increasing the capability of HTML, so you let the DOM worry about manipulating itself (so to speak). I'll demonstrate with a simple example.
<div rotate-on-click="45"></div>
First, I'd just like to comment that if we've given our HTML this functionality via a custom Angular Directive, we're already done. That's a breath of fresh air. More on that in a moment.
function rotate(deg, elem) {
$(elem).css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
}
function addRotateOnClick($elems) {
$elems.each(function(i, elem) {
var deg = 0;
$(elem).click(function() {
deg+= parseInt($(this).attr('rotate-on-click'), 10);
rotate(deg, this);
});
});
}
addRotateOnClick($('[rotate-on-click]'));
app.directive('rotateOnClick', function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
var deg = 0;
element.bind('click', function() {
deg+= parseInt(attrs.rotateOnClick, 10);
element.css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
});
}
};
});
Pretty light, VERY clean and that's just a simple manipulation! In my opinion, the angular approach wins in all regards, especially how the functionality is abstracted away and the dom manipulation is declared in the DOM. The functionality is hooked onto the element via an html attribute, so there is no need to query the DOM via a selector, and we've got two nice closures - one closure for the directive factory where variables are shared across all usages of the directive, and one closure for each usage of the directive in the link
function (or compile
function).
Two-way data binding and directives for DOM manipulation are only the start of what makes Angular awesome. Angular promotes all code being modular, reusable, and easily testable and also includes a single-page app routing system. It is important to note that jQuery is a library of commonly needed convenience/cross-browser methods, but Angular is a full featured framework for creating single page apps. The angular script actually includes its own "lite" version of jQuery so that some of the most essential methods are available. Therefore, you could argue that using Angular IS using jQuery (lightly), but Angular provides much more "magic" to help you in the process of creating apps.
This is a great post for more related information: How do I “think in AngularJS” if I have a jQuery background?
The above points are aimed at the OP's specific concerns. I'll also give an overview of the other important differences. I suggest doing additional reading about each topic as well.
Angular is a framework, jQuery is a library. Frameworks have their place and libraries have their place. However, there is no question that a good framework has more power in writing an application than a library. That's exactly the point of a framework. You're welcome to write your code in plain JS, or you can add in a library of common functions, or you can add a framework to drastically reduce the code you need to accomplish most things. Therefore, a more appropriate question is:
Good frameworks can help architect your code so that it is modular (therefore reusable), DRY, readable, performant and secure. jQuery is not a framework, so it doesn't help in these regards. We've all seen the typical walls of jQuery spaghetti code. This isn't jQuery's fault - it's the fault of developers that don't know how to architect code. However, if the devs did know how to architect code, they would end up writing some kind of minimal "framework" to provide the foundation (achitecture, etc) I discussed a moment ago, or they would add something in. For example, you might add RequireJS to act as part of your framework for writing good code.
Here are some things that modern frameworks are providing:
Before I further discuss Angular, I'd like to point out that Angular isn't the only one of its kind. Durandal, for example, is a framework built on top of jQuery, Knockout, and RequireJS. Again, jQuery cannot, by itself, provide what Knockout, RequireJS, and the whole framework built on top them can. It's just not comparable.
If you need to destroy a planet and you have a Death Star, use the Death star.
Building on my previous points about what frameworks provide, I'd like to commend the way that Angular provides them and try to clarify why this is matter of factually superior to jQuery alone.
In my above example, it is just absolutely unavoidable that jQuery has to hook onto the DOM in order to provide functionality. That means that the view (html) is concerned about functionality (because it is labeled with some kind of identifier - like "image slider") and JavaScript is concerned about providing that functionality. Angular eliminates that concept via abstraction. Properly written code with Angular means that the view is able to declare its own behavior. If I want to display a clock:
<clock></clock>
Done.
Yes, we need to go to JavaScript to make that mean something, but we're doing this in the opposite way of the jQuery approach. Our Angular directive (which is in it's own little world) has "augumented" the html and the html hooks the functionality into itself.
Angular gives you a straightforward way to structure your code. View things belong in the view (html), augmented view functionality belongs in directives, other logic (like ajax calls) and functions belong in services, and the connection of services and logic to the view belongs in controllers. There are some other angular components as well that help deal with configuration and modification of services, etc. Any functionality you create is automatically available anywhere you need it via the Injector subsystem which takes care of Dependency Injection throughout the application. When writing an application (module), I break it up into other reusable modules, each with their own reusable components, and then include them in the bigger project. Once you solve a problem with Angular, you've automatically solved it in a way that is useful and structured for reuse in the future and easily included in the next project. A HUGE bonus to all of this is that your code will be much easier to test.
THANK GOODNESS. The aforementioned jQuery spaghetti code resulted from a dev that made something "work" and then moved on. You can write bad Angular code, but it's much more difficult to do so, because Angular will fight you about it. This means that you have to take advantage (at least somewhat) to the clean architecture it provides. In other words, it's harder to write bad code with Angular, but more convenient to write clean code.
Angular is far from perfect. The web development world is always growing and changing and there are new and better ways being put forth to solve problems. Facebook's React and Flux, for example, have some great advantages over Angular, but come with their own drawbacks. Nothing's perfect, but Angular has been and is still awesome for now. Just as jQuery once helped the web world move forward, so has Angular, and so will many to come.
It depends on what you want to test:
If strName = vbNullString
or IF strName = ""
or Len(strName) = 0
(last one being supposedly faster)If myObject is Nothing
If isnull(rs!myField)
If range("B3") = ""
or IsEmpty(myRange)
Extended discussion available here (for Access, but most of it works for Excel as well).
Updated Answer There is no convenient way to do this using Dynamo DB Queries with predictable throughput. One (sub optimal) option is to use a GSI with an artificial HashKey & CreatedAt. Then query by HashKey alone and mention ScanIndexForward to order the results. If you can come up with a natural HashKey (say the category of the item etc) then this method is a winner. On the other hand, if you keep the same HashKey for all items, then it will affect the throughput mostly when when your data set grows beyond 10GB (one partition)
Original Answer: You can do this now in DynamoDB by using GSI. Make the "CreatedAt" field as a GSI and issue queries like (GT some_date). Store the date as a number (msecs since epoch) for this kind of queries.
Details are available here: Global Secondary Indexes - Amazon DynamoDB : http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.html#GSI.Using
This is a very powerful feature. Be aware that the query is limited to (EQ | LE | LT | GE | GT | BEGINS_WITH | BETWEEN) Condition - Amazon DynamoDB : http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Condition.html
That's generally controlled by the profile associated with the user Tomcat is connecting as.
SQL> SELECT PROFILE, LIMIT FROM DBA_PROFILES WHERE RESOURCE_NAME = 'IDLE_TIME';
PROFILE LIMIT
------------------------------ ----------------------------------------
DEFAULT UNLIMITED
SQL> SELECT PROFILE FROM DBA_USERS WHERE USERNAME = USER;
PROFILE
------------------------------
DEFAULT
So the user I'm connected to has unlimited idle time - no time out.
You do not have to install urllib3
. You can choose any HTTP-request-making library that fits your needs and feed the response to BeautifulSoup
. The choice is though usually requests
because of the rich feature set and convenient API. You can install requests
by entering pip install requests
in the command line. Here is a basic example:
from bs4 import BeautifulSoup
import requests
url = "url"
response = requests.get(url)
soup = BeautifulSoup(response.content, "html.parser")
There are many paths through your code whereby your variables are not initialized, which is why the compiler complains.
Specifically, you are not validating the user input for creditPlan
- if the user enters a value of anything else than "0","1","2" or "3"
, then none of the branches indicated will be executed (and creditPlan
will not be defaulted to zero as per your user prompt).
As others have mentioned, the compiler error can be avoided by either a default initialization of all derived variables before the branches are checked, OR ensuring that at least one of the branches is executed (viz, mutual exclusivity of the branches, with a fall through else
statement).
I would however like to point out other potential improvements:
CreditPlan
appears to have a finite domain and is better suited to an enumeration
or Dictionary
than a string
. Financial data and percentages should always be modelled as decimal
, not double
to avoid rounding issues, and 'status' appears to be a boolean.monthlyCharge = balance * annualRate * (1/12))
is common to more than one branch. For maintenance reasons, do not duplicate this code.e.g. here is an alternative representation of your model:
// Keep all Credit Plan parameters together in a model
public class CreditPlan
{
public Func<decimal, decimal, decimal> MonthlyCharge { get; set; }
public decimal AnnualRate { get; set; }
public Func<bool, Decimal> LateFee { get; set; }
}
// DRY up repeated calculations
static private decimal StandardMonthlyCharge(decimal balance, decimal annualRate)
{
return balance * annualRate / 12;
}
public static Dictionary<int, CreditPlan> CreditPlans = new Dictionary<int, CreditPlan>
{
{ 0, new CreditPlan
{
AnnualRate = .35M,
LateFee = _ => 0.0M,
MonthlyCharge = StandardMonthlyCharge
}
},
{ 1, new CreditPlan
{
AnnualRate = .30M,
LateFee = late => late ? 0 : 25.0M,
MonthlyCharge = StandardMonthlyCharge
}
},
{ 2, new CreditPlan
{
AnnualRate = .20M,
LateFee = late => late ? 0 : 35.0M,
MonthlyCharge = (balance, annualRate) => balance > 100
? balance * annualRate / 12
: 0
}
},
{ 3, new CreditPlan
{
AnnualRate = .15M,
LateFee = _ => 0.0M,
MonthlyCharge = (balance, annualRate) => balance > 500
? (balance - 500) * annualRate / 12
: 0
}
}
};
There are two things I think you could try to develop iPhone applications.
You can try the Aptana mobile wep app plugin for eclipse which is nice, although still in early stage. It comes with a emulator for running the applications so this could be helpful
You can try cocoa
(Extra) Here is a nice guide I found of guy who managed to get the iPhone SDK running in ubuntu, hope this help -_-. iPhone on Ubuntu
You got a bunch of good answers, so I'll just throw out a suggestion. If you are going to be working on this project for more than 2 days, download eclipse or netbeans and build your project in there.
If you are not normally a java programmer, then the help it will give you will be invaluable.
It's not worth the 1/2 hour download/install if you are only spending 2 hours on it.
Both have hotkeys/menu items to "Fix imports", with this you should never have to worry about imports again.
It was used during the typewriter era to move down a page to the next vertical stop, typically spaced 6 lines apart (much the same way horizontal tabs move along a line by 8 characters).
In modern day settings, the vt is of very little, if any, significance.