No, goto
is not used in Java, despite being a reserved word. The same is true for const
. Both of these are used in C++, which is probably the reason why they're reserved; the intention was probably to avoid confusing C++ programmers migrating to Java, and perhaps also to keep the option of using them in later revisions of Java.
you should declare label first use this :
Select Case parameter
Case "userID"
' does something here.
Case "packageID"
' does something here.
Case "mvrType"
If otherFactor Then
' does something here.
Else
GoTo else
End If
Case Else
else :
' does some processing...
Exit Select
End Select
Actually, I see that ECMAScript (JavaScript) DOES INDEED have a goto statement. However, the JavaScript goto has two flavors!
The two JavaScript flavors of goto are called labeled continue and labeled break. There is no keyword "goto" in JavaScript. The goto is accomplished in JavaScript using the break and continue keywords.
And this is more or less explicitly stated on the w3schools website here http://www.w3schools.com/js/js_switch.asp.
I find the documentation of the labeled continue and labeled break somewhat awkwardly expressed.
The difference between the labeled continue and labeled break is where they may be used. The labeled continue can only be used inside a while loop. See w3schools for some more information.
===========
Another approach that will work is to have a giant while statement with a giant switch statement inside:
while (true)
{
switch (goto_variable)
{
case 1:
// some code
goto_variable = 2
break;
case 2:
goto_variable = 5 // case in etc. below
break;
case 3:
goto_variable = 1
break;
etc. ...
}
}
@fizzer.myopenid.com: your posted code snippet is equivalent to the following:
while (system_call() == -1)
{
if (errno != EINTR)
{
// handle real errors
break;
}
}
I definitely prefer this form.
As already pointed out by all the answers goto
- a reserved word in Java
and is not used in the language.
restart:
is called an identifier followed by a colon.
Here are a few things you need to take care of if you wish to achieve similar
behavior -
outer: // Should be placed exactly before the loop
loopingConstructOne { // We can have statements before the outer but not inbetween the label and the loop
inner:
loopingConstructTwo {
continue; // This goes to the top of loopingConstructTwo and continue.
break; // This breaks out of loopingConstructTwo.
continue outer; // This goes to the outer label and reenters loopingConstructOne.
break outer; // This breaks out of the loopingConstructOne.
continue inner; // This will behave similar to continue.
break inner; // This will behave similar to break.
}
}
I'm not sure of whether should I say similar
as I already have.
This solution had the following issues:
:
label:
anywhere on a line as a labelHere's a fixed (shell-check
clean) version:
#!/bin/bash
# GOTO for bash, based upon https://stackoverflow.com/a/31269848/5353461
function goto
{
local label=$1
cmd=$(sed -En "/^[[:space:]]*#[[:space:]]*$label:[[:space:]]*#/{:a;n;p;ba};" "$0")
eval "$cmd"
exit
}
start=${1:-start}
goto "$start" # GOTO start: by default
#start:# Comments can occur after labels
echo start
goto end
# skip: # Whitespace is allowed
echo this is usually skipped
# end: #
echo end
If you really want something like goto statements, you could always try breaking to named blocks.
You have to be within the scope of the block to break to the label:
namedBlock: {
if (j==2) {
// this will take you to the label above
break namedBlock;
}
}
I won't lecture you on why you should avoid goto's - I'm assuming you already know the answer to that.
answer = None
while True:
answer = raw_input("Do you like pie?")
if answer in ("yes", "no"): break
print "That is not a yes or a no"
Would give you what you want with no goto statement.
I wanted the same answer and I didnt want to use goto
. So I used the following example (from learnpythonthehardway)
def sample():
print "This room is full of gold how much do you want?"
choice = raw_input("> ")
how_much = int(choice)
if "0" in choice or "1" in choice:
check(how_much)
else:
print "Enter a number with 0 or 1"
sample()
def check(n):
if n < 150:
print "You are not greedy, you win"
exit(0)
else:
print "You are nuts!"
exit(0)
I have a better solution which allows to create multiple view types in a declarative and type safe way. It’s written in Kotlin which btw is really nice.
Simple view holders for all required view types
class ViewHolderMedium(itemView: View) : RecyclerView.ViewHolder(itemView) {
val icon: ImageView = itemView.findViewById(R.id.icon) as ImageView
val label: TextView = itemView.findViewById(R.id.label) as TextView
}
There is an abstraction of adapter data item. Note that a view type is represented by a hashCode of particular view holder class (KClass in Kotlin)
trait AdapterItem {
val viewType: Int
fun bindViewHolder(viewHolder: RecyclerView.ViewHolder)
}
abstract class AdapterItemBase<T>(val viewHolderClass: KClass<T>) : AdapterItem {
override val viewType: Int = viewHolderClass.hashCode()
abstract fun bindViewHolder(viewHolder: T)
override fun bindViewHolder(viewHolder: RecyclerView.ViewHolder) {
bindViewHolder(viewHolder as T)
}
}
Only bindViewHolder
needs to be overriden in concrete adapter item classes (type safe way)
class AdapterItemMedium(val icon: Drawable, val label: String, val onClick: () -> Unit) : AdapterItemBase<ViewHolderMedium>(ViewHolderMedium::class) {
override fun bindViewHolder(viewHolder: ViewHolderMedium) {
viewHolder.icon.setImageDrawable(icon)
viewHolder.label.setText(label)
viewHolder.itemView.setOnClickListener { onClick() }
}
}
List of such AdapterItemMedium
objects is a data source for the adapter which actually accepts List<AdapterItem>
see below.
Important part of this solution is a view holder factory which will provide fresh instances of a specific ViewHolder
class ViewHolderProvider {
private val viewHolderFactories = hashMapOf<Int, Pair<Int, Any>>()
fun provideViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
val (layoutId: Int, f: Any) = viewHolderFactories.get(viewType)
val viewHolderFactory = f as (View) -> RecyclerView.ViewHolder
val view = LayoutInflater.from(viewGroup.getContext()).inflate(layoutId, viewGroup, false)
return viewHolderFactory(view)
}
fun registerViewHolderFactory<T>(key: KClass<T>, layoutId: Int, viewHolderFactory: (View) -> T) {
viewHolderFactories.put(key.hashCode(), Pair(layoutId, viewHolderFactory))
}
}
And the simple adapter class looks like this
public class MultitypeAdapter(val items: List<AdapterItem>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
val viewHolderProvider = ViewHolderProvider() // inject ex Dagger2
init {
viewHolderProvider!!.registerViewHolderFactory(ViewHolderMedium::class, R.layout.item_medium, { itemView ->
ViewHolderMedium(itemView)
})
}
override fun getItemViewType(position: Int): Int {
return items[position].viewType
}
override fun getItemCount(): Int {
return items.size()
}
override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder? {
return viewHolderProvider!!.provideViewHolder(viewGroup, viewType)
}
override fun onBindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int) {
items[position].bindViewHolder(viewHolder)
}
}
Only 3 steps to create a new view type:
ViewHolderProvider
Here is an example of this concept : android-drawer-template It goes even further - view type which act as a spinner component, selectable adapter items.
To clarify, the syntax is as follows for MongoDB version 4.0.x:
db.collection.update({},{$set: {"new_field*":1}},false,true)
Here is a working example adding a published field to the articles collection and setting the field's value to true:
db.articles.update({},{$set: {"published":true}},false,true)
The use
operator is for giving aliases to names of classes, interfaces or other namespaces. Most use
statements refer to a namespace or class that you'd like to shorten:
use My\Full\Namespace;
is equivalent to:
use My\Full\Namespace as Namespace;
// Namespace\Foo is now shorthand for My\Full\Namespace\Foo
If the use
operator is used with a class or interface name, it has the following uses:
// after this, "new DifferentName();" would instantiate a My\Full\Classname
use My\Full\Classname as DifferentName;
// global class - making "new ArrayObject()" and "new \ArrayObject()" equivalent
use ArrayObject;
The use
operator is not to be confused with autoloading. A class is autoloaded (negating the need for include
) by registering an autoloader (e.g. with spl_autoload_register
). You might want to read PSR-4 to see a suitable autoloader implementation.
Just need to put condition to execute task for specific distribution
- name: Creates directory
file: path=/src/www state=directory
when: ansible_distribution == 'Debian'
TextInputLayout til = (TextInputLayout)editText.getParent();
til.setErrorEnabled(true);
til.setError("some error..");
Your tuples are basically key-value pairs--a python dict
--so:
l = [(1,"juca"),(22,"james"),(53,"xuxa"),(44,"delicia")]
val = dict(l)[53]
Edit -- aha, you say you want the index value of (53, "xuxa"). If this is really what you want, you'll have to iterate through the original list, or perhaps make a more complicated dictionary:
d = dict((n,i) for (i,n) in enumerate(e[0] for e in l))
idx = d[53]
To expand on Peter's answer - you could make Search a first-class resource:
POST /searches # create a new search
GET /searches # list all searches (admin)
GET /searches/{id} # show the results of a previously-run search
DELETE /searches/{id} # delete a search (admin)
The Search resource would have fields for color, make model, garaged status, etc and could be specified in XML, JSON, or any other format. Like the Car and Garage resource, you could restrict access to Searches based on authentication. Users who frequently run the same Searches can store them in their profiles so that they don't need to be re-created. The URLs will be short enough that in many cases they can be easily traded via email. These stored Searches can be the basis of custom RSS feeds, and so on.
There are many possibilities for using Searches when you think of them as resources.
The idea is explained in more detail in this Railscast.
If you hit = and expect to see line numbers, but only see byte counts, then line numbers are turned off. Hit -n to turn them on, and make sure $LESS
doesn't include 'n'.
Turning off line numbers by default (for example, setting LESS=n
) speeds up searches in very large files. It is handy if you frequently search through big files, but don't usually care which line you're on.
I typically run with LESS=RSXin
(escape codes enabled, long lines chopped, don't clear the screen on exit, ignore case on all lower case searches, and no line number counting by default) and only use -n or -S from inside less
as needed.
I recently had the same problem and used the solution provided by Harry Joy. That solution only works with with zero-based enumaration though. I also wouldn't consider it save as it doesn't deal with indexes that are out of range.
The solution I ended up using might not be as simple but it's completely save and won't hurt the performance of your code even with big enums:
public enum Example {
UNKNOWN(0, "unknown"), ENUM1(1, "enum1"), ENUM2(2, "enum2"), ENUM3(3, "enum3");
private static HashMap<Integer, Example> enumById = new HashMap<>();
static {
Arrays.stream(values()).forEach(e -> enumById.put(e.getId(), e));
}
public static Example getById(int id) {
return enumById.getOrDefault(id, UNKNOWN);
}
private int id;
private String description;
private Example(int id, String description) {
this.id = id;
this.description= description;
}
public String getDescription() {
return description;
}
public int getId() {
return id;
}
}
If you are sure that you will never be out of range with your index and you don't want to use UNKNOWN
like I did above you can of course also do:
public static Example getById(int id) {
return enumById.get(id);
}
So in simple words: Over clause can be used to select non aggregated values along with Aggregated ones.
Partition BY, ORDER BY inside, and ROWS or RANGE are part of OVER() by clause.
partition by is used to partition data and then perform these window, aggregated functions, and if we don't have partition by the then entire result set is considered as a single partition.
OVER clause can be used with Ranking Functions(Rank, Row_Number, Dense_Rank..), Aggregate Functions like (AVG, Max, Min, SUM...etc) and Analytics Functions like (First_Value, Last_Value, and few others).
Let's See basic syntax of OVER clause
OVER (
[ <PARTITION BY clause> ]
[ <ORDER BY clause> ]
[ <ROW or RANGE clause> ]
)
PARTITION BY: It is used to partition data and perform operations on groups with the same data.
ORDER BY: It is used to define the logical order of data in Partitions. When we don't specify Partition, entire resultset is considered as a single partition
: This can be used to specify what rows are supposed to be considered in a partition when performing the operation.
Let's take an example:
Here is my dataset:
Id Name Gender Salary
----------- -------------------------------------------------- ---------- -----------
1 Mark Male 5000
2 John Male 4500
3 Pavan Male 5000
4 Pam Female 5500
5 Sara Female 4000
6 Aradhya Female 3500
7 Tom Male 5500
8 Mary Female 5000
9 Ben Male 6500
10 Jodi Female 7000
11 Tom Male 5500
12 Ron Male 5000
So let me execute different scenarios and see how data is impacted and I'll come from difficult syntax to simple one
Select *,SUM(salary) Over(order by salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) as sum_sal from employees
Id Name Gender Salary sum_sal
----------- -------------------------------------------------- ---------- ----------- -----------
6 Aradhya Female 3500 3500
5 Sara Female 4000 7500
2 John Male 4500 12000
3 Pavan Male 5000 32000
1 Mark Male 5000 32000
8 Mary Female 5000 32000
12 Ron Male 5000 32000
11 Tom Male 5500 48500
7 Tom Male 5500 48500
4 Pam Female 5500 48500
9 Ben Male 6500 55000
10 Jodi Female 7000 62000
Just observe the sum_sal part. Here I am using order by Salary and using "RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW". In this case, we are not using partition so entire data will be treated as one partition and we are ordering on salary. And the important thing here is UNBOUNDED PRECEDING AND CURRENT ROW. This means when we are calculating the sum, from starting row to the current row for each row. But if we see rows with salary 5000 and name="Pavan", ideally it should be 17000 and for salary=5000 and name=Mark, it should be 22000. But as we are using RANGE and in this case, if it finds any similar elements then it considers them as the same logical group and performs an operation on them and assigns value to each item in that group. That is the reason why we have the same value for salary=5000. The engine went up to salary=5000 and Name=Ron and calculated sum and then assigned it to all salary=5000.
Select *,SUM(salary) Over(order by salary ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) as sum_sal from employees
Id Name Gender Salary sum_sal
----------- -------------------------------------------------- ---------- ----------- -----------
6 Aradhya Female 3500 3500
5 Sara Female 4000 7500
2 John Male 4500 12000
3 Pavan Male 5000 17000
1 Mark Male 5000 22000
8 Mary Female 5000 27000
12 Ron Male 5000 32000
11 Tom Male 5500 37500
7 Tom Male 5500 43000
4 Pam Female 5500 48500
9 Ben Male 6500 55000
10 Jodi Female 7000 62000
So with ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW The difference is for same value items instead of grouping them together, It calculates SUM from starting row to current row and it doesn't treat items with same value differently like RANGE
Select *,SUM(salary) Over(order by salary) as sum_sal from employees
Id Name Gender Salary sum_sal
----------- -------------------------------------------------- ---------- ----------- -----------
6 Aradhya Female 3500 3500
5 Sara Female 4000 7500
2 John Male 4500 12000
3 Pavan Male 5000 32000
1 Mark Male 5000 32000
8 Mary Female 5000 32000
12 Ron Male 5000 32000
11 Tom Male 5500 48500
7 Tom Male 5500 48500
4 Pam Female 5500 48500
9 Ben Male 6500 55000
10 Jodi Female 7000 62000
These results are the same as
Select *, SUM(salary) Over(order by salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) as sum_sal from employees
That is because Over(order by salary) is just a short cut of Over(order by salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) So wherever we simply specify Order by without ROWS or RANGE it is taking RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW as default.
Note: This is applicable only to Functions that actually accept RANGE/ROW. For example, ROW_NUMBER and few others don't accept RANGE/ROW and in that case, this doesn't come into the picture.
Till now we saw that Over clause with an order by is taking Range/ROWS and syntax looks something like this RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW And it is actually calculating up to the current row from the first row. But what If it wants to calculate values for the entire partition of data and have it for each column (that is from 1st row to last row). Here is the query for that
Select *,sum(salary) Over(order by salary ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) as sum_sal from employees
Id Name Gender Salary sum_sal
----------- -------------------------------------------------- ---------- ----------- -----------
1 Mark Male 5000 62000
2 John Male 4500 62000
3 Pavan Male 5000 62000
4 Pam Female 5500 62000
5 Sara Female 4000 62000
6 Aradhya Female 3500 62000
7 Tom Male 5500 62000
8 Mary Female 5000 62000
9 Ben Male 6500 62000
10 Jodi Female 7000 62000
11 Tom Male 5500 62000
12 Ron Male 5000 62000
Instead of CURRENT ROW, I am specifying UNBOUNDED FOLLOWING which instructs the engine to calculate till the last record of partition for each row.
Now coming to your point on what is OVER() with empty braces?
It is just a short cut for Over(order by salary ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
Here we are indirectly specifying to treat all my resultset as a single partition and then perform calculations from the first record to the last record of each partition.
Select *,Sum(salary) Over() as sum_sal from employees
Id Name Gender Salary sum_sal
----------- -------------------------------------------------- ---------- ----------- -----------
1 Mark Male 5000 62000
2 John Male 4500 62000
3 Pavan Male 5000 62000
4 Pam Female 5500 62000
5 Sara Female 4000 62000
6 Aradhya Female 3500 62000
7 Tom Male 5500 62000
8 Mary Female 5000 62000
9 Ben Male 6500 62000
10 Jodi Female 7000 62000
11 Tom Male 5500 62000
12 Ron Male 5000 62000
I did create a video on this and if you are interested you can visit it. https://www.youtube.com/watch?v=CvVenuVUqto&t=1177s
Thanks, Pavan Kumar Aryasomayajulu HTTP://xyzcoder.github.io
I think the easiest way is through the collections module.
import collections
FinanceCtaCteM = collections.namedtuple('FinanceCtaCte', 'forma_pago doc_pago get_total')
def get_total(): return 98989898
financtacteobj = FinanceCtaCteM(forma_pago='CONTADO', doc_pago='EFECTIVO',
get_total=get_total)
print financtacteobj.get_total()
print financtacteobj.forma_pago
print financtacteobj.doc_pago
Excel Export Script works on IE7+ , Firefox and Chrome
===========================================================
function fnExcelReport()
{
var tab_text="<table border='2px'><tr bgcolor='#87AFC6'>";
var textRange; var j=0;
tab = document.getElementById('headerTable'); // id of table
for(j = 0 ; j < tab.rows.length ; j++)
{
tab_text=tab_text+tab.rows[j].innerHTML+"</tr>";
//tab_text=tab_text+"</tr>";
}
tab_text=tab_text+"</table>";
tab_text= tab_text.replace(/<A[^>]*>|<\/A>/g, "");//remove if u want links in your table
tab_text= tab_text.replace(/<img[^>]*>/gi,""); // remove if u want images in your table
tab_text= tab_text.replace(/<input[^>]*>|<\/input>/gi, ""); // reomves input params
var ua = window.navigator.userAgent;
var msie = ua.indexOf("MSIE ");
if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./)) // If Internet Explorer
{
txtArea1.document.open("txt/html","replace");
txtArea1.document.write(tab_text);
txtArea1.document.close();
txtArea1.focus();
sa=txtArea1.document.execCommand("SaveAs",true,"Say Thanks to Sumit.xls");
}
else //other browser not tested on IE 11
sa = window.open('data:application/vnd.ms-excel,' + encodeURIComponent(tab_text));
return (sa);
}
Just Create a blank iframe
enter code here
<iframe id="txtArea1" style="display:none"></iframe>
Call this function on
<button id="btnExport" onclick="fnExcelReport();"> EXPORT
</button>
The reason I used a +
instead of a '*' is because a plus is defined as one or more of the preceding element, where an asterisk is zero or more. In this case we want a delimiter that's a little more concrete, so "one or more" spaces.
word[Aa]\s+word[Bb]\s+word[Cc]
will match:
wordA wordB wordC
worda wordb wordc
wordA wordb wordC
The words, in this expression, will have to be specific, and also in order (a, b, then c)
Just do
LogManager.getLogManager().reset();
It can block your page
document.write
only works while the page is loading; If you call it after the page is done loading, it will overwrite the whole page.
This effectively means you have to call it from an inline script block - And that will prevent the browser from processing parts of the page that follow. Scripts and Images will not be downloaded until the writing block is finished.
hg strip
is what you are looking for. It's analogous of git reset
if you familiar with git.
Use console:
You need to know the revision number. hg log -l 10
. This command shows the last 10 commits. Find commit you are looking for. You need 4 digit number from changeset line changeset: 5888:ba6205914681
Then hg strip -r 5888 --keep
. This removes the record of the commit but keeps all files modified and then you could recommit them.
(if you want to delete files to just remove --keep hg strip -r 5888
Both top answers are incorrect.
A short one-liner that uses pure JavaScript, accounts for the local timezone and requires no extra functions to be defined:
const element = document.getElementById('date-input');_x000D_
element.valueAsNumber = Date.now()-(new Date()).getTimezoneOffset()*60000;
_x000D_
<input id='date-input' type='date'>
_x000D_
This gets the current datetime in milliseconds (since epoch) and applies the timezone offset in milliseconds (minutes * 60k minutes per millisecond).
You can set the date using element.valueAsDate
but then you have an extra call to the Date()
constructor.
using (var connection = new SqlConnection("Enter Your Connection String"))
{
connection.Open();
using (var command = connection.CreateCommand())
{
command.CommandText = "Enter the First Command Here";
command.ExecuteNonQuery();
command.CommandText = "Enter Second Comand Here";
command.ExecuteNonQuery();
//Similarly You can Add Multiple
}
}
Because you tried to access an element in a collection, using a numeric index that exceeds the collection's boundaries.
The first element in a collection is generally located at index 0
. The last element is at index n-1
, where n
is the Size
of the collection (the number of elements it contains). If you attempt to use a negative number as an index, or a number that is larger than Size-1
, you're going to get an error.
When you declare an array like this:
var array = new int[6]
The first and last elements in the array are
var firstElement = array[0];
var lastElement = array[5];
So when you write:
var element = array[5];
you are retrieving the sixth element in the array, not the fifth one.
Typically, you would loop over an array like this:
for (int index = 0; index < array.Length; index++)
{
Console.WriteLine(array[index]);
}
This works, because the loop starts at zero, and ends at Length-1
because index
is no longer less than Length
.
This, however, will throw an exception:
for (int index = 0; index <= array.Length; index++)
{
Console.WriteLine(array[index]);
}
Notice the <=
there? index
will now be out of range in the last loop iteration, because the loop thinks that Length
is a valid index, but it is not.
Lists work the same way, except that you generally use Count
instead of Length
. They still start at zero, and end at Count - 1
.
for (int index = 0; i < list.Count; index++)
{
Console.WriteLine(list[index]);
}
However, you can also iterate through a list using foreach
, avoiding the whole problem of indexing entirely:
foreach (var element in list)
{
Console.WriteLine(element.ToString());
}
You cannot index an element that hasn't been added to a collection yet.
var list = new List<string>();
list.Add("Zero");
list.Add("One");
list.Add("Two");
Console.WriteLine(list[3]); // Throws exception.
You can try to use an in-memory database like HSQLDB.
Try doing this :
awk '{print substr($0, 1, length($0)-1)}' file.txt
This is more generic than just removing the final comma but any last character
If you'd want to only remove the last comma with awk :
awk '{gsub(/,$/,""); print}' file.txt
You have to override the bootstrap default by being a bit more specific. Try this for a black background:
html body {
background-color: rgba(0,0,0,1.00);
}
I am just going to touch on overcoming the trade-off of regular adjacency list representation, since other answers have covered other aspects.
It is possible to represent a graph in adjacency list with EdgeExists query in amortized constant time, by taking advantage of Dictionary and HashSet data structures. The idea is to keep vertices in a dictionary, and for each vertex, we keep a hash set referencing to other vertices it has edges with.
One minor trade-off in this implementation is that it will have space complexity O(V + 2E) instead of O(V + E) as in regular adjacency list, since edges are represented twice here (because each vertex have its own hash set of edges). But operations such as AddVertex, AddEdge, RemoveEdge can be done in amortized time O(1) with this implementation, except for RemoveVertex which takes O(V) like adjacency matrix. This would mean that other than implementation simplicity, adjacency matrix don't have any specific advantage. We can save space on sparse graph with almost the same performance in this adjacency list implementation.
Take a look at implementations below in Github C# repository for details. Note that for weighted graph it uses a nested dictionary instead of dictionary-hash set combination so as to accommodate weight value. Similarly for directed graph there is separate hash sets for in & out edges.
Note: I believe using lazy deletion we can further optimize RemoveVertex operation to O(1) amortized, even though I haven't tested that idea. For example, upon deletion just mark the vertex as deleted in dictionary, and then lazily clear orphaned edges during other operations.
After creating your client specifying the binding and endpoint address, you can assign an OperationTimeout,
client.InnerChannel.OperationTimeout = new TimeSpan(0, 5, 0);
Also, you can use this if you don't want to use the System.Web
assembly:
var encoded = System.Security.SecurityElement.Escape(unencoded)
Per this article, the difference between System.Security.SecurityElement.Escape()
and System.Web.HttpUtility.HtmlEncode()
is that the former also encodes apostrophe (')
characters.
Here are some tidyverse
and custom function options that might work depending on your needs:
library(tidyverse)
# custom function to generate, filter, and mutate the data:
combine_dfs <- function(i){
data_frame(x = rnorm(5), y = runif(5)) %>%
filter(x < y) %>%
mutate(x_plus_y = x + y) %>%
mutate(i = i)
}
df <- 1:5 %>% map_df(~combine_dfs(.))
df <- map_df(1:5, ~combine_dfs(.)) # both give the same results
> df %>% head()
# A tibble: 6 x 4
x y x_plus_y i
<dbl> <dbl> <dbl> <int>
1 -0.973 0.673 -0.300 1
2 -0.553 0.0463 -0.507 1
3 0.250 0.716 0.967 2
4 -0.745 0.0640 -0.681 2
5 -0.736 0.228 -0.508 2
6 -0.365 0.496 0.131 3
You could do something similar if you had a directory of files that needed to be combined:
dir_path <- '/path/to/data/test_directory/'
list.files(dir_path)
combine_files <- function(path, file){
read_csv(paste0(path, file)) %>%
filter(a < b) %>%
mutate(a_plus_b = a + b) %>%
mutate(file_name = file)
}
df <- list.files(dir_path, '\\.csv$') %>%
map_df(~combine_files(dir_path, .))
# or if you have Excel files, using the readxl package:
combine_xl_files <- function(path, file){
readxl::read_xlsx(paste0(path, file)) %>%
filter(a < b) %>%
mutate(a_plus_b = a + b) %>%
mutate(file_name = file)
}
df <- list.files(dir_path, '\\.xlsx$') %>%
map_df(~combine_xl_files(dir_path, .))
public static String[] split(String src, int len) {
String[] result = new String[(int)Math.ceil((double)src.length()/(double)len)];
for (int i=0; i<result.length; i++)
result[i] = src.substring(i*len, Math.min(src.length(), (i+1)*len));
return result;
}
make is_edit
of type boolean.
<input [disabled]=is_edit id="name" type="text">
export class App {
name:string;
is_edit: boolean;
constructor() {
this.name = 'Angular2'
this.is_edit = true;
}
}
You may use Json.Net framework to do this. Just like this :
Account account = JsonConvert.DeserializeObject<Account>(json);
the home page : http://json.codeplex.com/
the document about this : http://james.newtonking.com/json/help/index.html#
This happens when the pointer passed to free() is not valid or has been modified somehow. I don't really know the details here. The bottom line is that the pointer passed to free() must be the same as returned by malloc(), realloc() and their friends. It's not always easy to spot what the problem is for a novice in their own code or even deeper in a library. In my case, it was a simple case of an undefined (uninitialized) pointer related to branching.
The free() function frees the memory space pointed to by ptr, which must have been returned by a previous call to malloc(), calloc() or realloc(). Otherwise, or if free(ptr) has already been called before, undefined behavior occurs. If ptr is NULL, no operation is performed. GNU 2012-05-10 MALLOC(3)
char *words; // setting this to NULL would have prevented the issue
if (condition) {
words = malloc( 512 );
/* calling free sometime later works here */
free(words)
} else {
/* do not allocate words in this branch */
}
/* free(words); -- error here --
*** glibc detected *** ./bin: munmap_chunk(): invalid pointer: 0xb________ ***/
There are many similar questions here about the related free() and rellocate() functions. Some notable answers providing more details:
*** glibc detected *** free(): invalid next size (normal): 0x0a03c978 ***
*** glibc detected *** sendip: free(): invalid next size (normal): 0x09da25e8 ***
glibc detected, realloc(): invalid pointer
IMHO running everything in a debugger (Valgrind) is not the best option because errors like this are often caused by inept or novice programmers. It's more productive to figure out the issue manually and learn how to avoid it in the future.
You can simply replace all \n
with <br/>
tag so that when page is displayed then it breaks line.
UPDATE table SET field = REPLACE(field, '\n', '<br/>')
I have site developed using jquery ui, I just tried to plug in bootstrap for future development and styling but it breaks virtually everything.
So No they are not compatible.
Boxing and Unboxing are specifically used to treat value-type objects as reference-type; moving their actual value to the managed heap and accessing their value by reference.
Without boxing and unboxing you could never pass value-types by reference; and that means you could not pass value-types as instances of Object.
I found if you have issues with including or mixing your page with something like http://www.example.com, you can fix that by putting //www.example.com instead
As many of the members suggested use LinkedHashSet to retain the order of the collection. U can wrap your set using this implementation.
SortedSet implementation can be used for sorted order but for your purpose use LinkedHashSet.
Also from the docs,
"This implementation spares its clients from the unspecified, generally chaotic ordering provided by HashSet, without incurring the increased cost associated with TreeSet. It can be used to produce a copy of a set that has the same order as the original, regardless of the original set's implementation:"
Source : http://docs.oracle.com/javase/6/docs/api/java/util/LinkedHashSet.html
Although this is an OS X question, here's what worked for me on Linux (Red Hat).
My virtualwrapper.sh was in
~/.local/bin/virtualenvwrapper.sh
This is probably because I installed virtualenvwrapper locally, using the --user
flag...
pip install --user virtualenvwrapper
...as an alternative to the risky practice of using sudo pip
.
Pure modern 2020 CSS only decision, without blurry scaling or non-handy transforming. And with tick! =)
Works nice in Firefox and Chromium-based browsers.
So, you can rule your checkboxes purely ADAPTIVE, just by setting parent block's font-height
and it will grow with text!
input[type='checkbox'] {_x000D_
-moz-appearance: none;_x000D_
-webkit-appearance: none;_x000D_
appearance: none;_x000D_
vertical-align: middle;_x000D_
outline: none;_x000D_
font-size: inherit;_x000D_
cursor: pointer;_x000D_
width: 1.0em;_x000D_
height: 1.0em;_x000D_
background: white;_x000D_
border-radius: 0.25em;_x000D_
border: 0.125em solid #555;_x000D_
position: relative;_x000D_
}_x000D_
_x000D_
input[type='checkbox']:checked {_x000D_
background: #adf;_x000D_
}_x000D_
_x000D_
input[type='checkbox']:checked:after {_x000D_
content: "?";_x000D_
position: absolute;_x000D_
font-size: 90%;_x000D_
left: 0.0625em;_x000D_
top: -0.25em;_x000D_
}
_x000D_
<label for="check1"><input type="checkbox" id="check1" checked="checked" /> checkbox one</label>_x000D_
<label for="check2"><input type="checkbox" id="check2" /> another checkbox</label>
_x000D_
GitHub Repositories are used to store all the files, folders and other resources which you care about.
Git Project : It is also one of the Resource in Git Repository and main use of it is to manage the projects with a visual board. If you create a project in Git Repository it create a visual board like a Kanban board to manage the project.
In this way, you can have multiple projects in a repository.
Hey If you want to print selected area or div ,Try This.
<style type="text/css">
@media print
{
body * { visibility: hidden; }
.div2 * { visibility: visible; }
.div2 { position: absolute; top: 40px; left: 30px; }
}
</style>
Hope it helps you
The plus operator converts operands to int first and then does the addition. So the result is the int. You need to cast it back to short explicitly because conversions from a "longer" type to "shorter" type a made explicit, so that you don't loose data accidentally with an implicit cast.
As to why int16 is cast to int, the answer is, because this is what is defined in C# spec. And C# is this way is because it was designed to closely match to the way how CLR works, and CLR has only 32/64 bit arithmetic and not 16 bit. Other languages on top of CLR may choose to expose this differently.
Two things you need to do, if you want to make a custom button design.
1st is: create a xml resource file in drawable folder (Example: btn_shape_rectangle.xml) then copy and paste the code there.
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="16dp"
android:shape="rectangle">
<solid
android:color="#fff"/>
<stroke
android:width="1dp"
android:color="#000000"
/>
<corners android:radius="10dp" />
</shape>
2nd is go to your layout button where you want to implement this design. just link up it. Example: android:background="@drawable/btn_shape_rectangle"
You can change shape color radius what design you want can do.
Hope it will works and help you. Happy Coding
I think there is something wrong with method_defined?
in Rails. It may be inconsistent or something, so if you use Rails, it's better to use something from attribute_method?(attribute)
.
"testing for method_defined? on ActiveRecord classes doesn't work until an instantiation" is a question about the inconsistency.
Add rich comparison operators to the object class, then use sort() method of the list.
See rich comparison in python.
Update: Although this method would work, I think solution from Triptych is better suited to your case because way simpler.
Setting the dialog cancelable to be false is enough, and either you touch outside of the alert dialog or click the back button will make the alert dialog disappear. So use this one:
setCancelable(false)
And the other function is not necessary anymore:
dialog.setCanceledOnTouchOutside(false);
If you are creating a temporary dialog and wondering there to put this line of code, here is an example:
new AlertDialog.Builder(this)
.setTitle("Trial Version")
.setCancelable(false)
.setMessage("You are using trial version!")
.setIcon(R.drawable.time_left)
.setPositiveButton(android.R.string.yes, null).show();
You can get the attributes of a model object returned as a hash using either
@post.attributes
or
@post.as_json
as_json
allows you to include associations and their attributes as well as specify which attributes to include/exclude (see documentation). However, if you only need the attributes of the base object, benchmarking in my app with ruby 2.2.3 and rails 4.2.2 demonstrates that attributes
requires less than half as much time as as_json
.
>> p = Problem.last
Problem Load (0.5ms) SELECT "problems".* FROM "problems" ORDER BY "problems"."id" DESC LIMIT 1
=> #<Problem id: 137, enabled: true, created_at: "2016-02-19 11:20:28", updated_at: "2016-02-26 07:47:34">
>>
>> p.attributes
=> {"id"=>137, "enabled"=>true, "created_at"=>Fri, 19 Feb 2016 11:20:28 UTC +00:00, "updated_at"=>Fri, 26 Feb 2016 07:47:34 UTC +00:00}
>>
>> p.as_json
=> {"id"=>137, "enabled"=>true, "created_at"=>Fri, 19 Feb 2016 11:20:28 UTC +00:00, "updated_at"=>Fri, 26 Feb 2016 07:47:34 UTC +00:00}
>>
>> n = 1000000
>> Benchmark.bmbm do |x|
?> x.report("attributes") { n.times { p.attributes } }
?> x.report("as_json") { n.times { p.as_json } }
>> end
Rehearsal ----------------------------------------------
attributes 6.910000 0.020000 6.930000 ( 7.078699)
as_json 14.810000 0.160000 14.970000 ( 15.253316)
------------------------------------ total: 21.900000sec
user system total real
attributes 6.820000 0.010000 6.830000 ( 7.004783)
as_json 14.990000 0.050000 15.040000 ( 15.352894)
You need to transform the object you are getting back into an array in the format that jQueryUI expects.
You can use $.map
to transform the dealers
object into that array.
$('#dealerName').autocomplete({
source: function (request, response) {
$.getJSON("/example/location/example.json?term=" + request.term, function (data) {
response($.map(data.dealers, function (value, key) {
return {
label: value,
value: key
};
}));
});
},
minLength: 2,
delay: 100
});
Note that when you select an item, the "key" will be placed in the text box. You can change this by tweaking the label
and value
properties that $.map
's callback function return.
Alternatively, if you have access to the server-side code that is generating the JSON, you could change the way the data is returned. As long as the data:
label
property, a value
property, or both, orIn other words, if you can format the data like this:
[{ value: "1463", label: "dealer 5"}, { value: "269", label: "dealer 6" }]
or this:
["dealer 5", "dealer 6"]
Then your JavaScript becomes much simpler:
$('#dealerName').autocomplete({
source: "/example/location/example.json"
});
from django.db.models import Q
User.objects.filter(Q(income__gte=5000) | Q(income__isnull=True))
Make sure you are following the Same Origin Policy. This means same domain, same subdomain, same protocol (http vs https) and same port.
How does pushState protect against potential content forgeries?
EDIT: As @robertc aptly pointed out in his comment, some browsers actually implement slightly different security policies when the origin is file:///
. Not to mention you can encounter problems when testing locally with file:///
when the page expects it is running from a different origin (and so your pushState
assumes production origin scenarios, not localhost scenarios)
Shortest one liner
Change the UTC day from 6 to 5 if you want Array to start from Sunday.
const getWeekDays = (locale) => [...Array(7).keys()].map((v)=>new Date(Date.UTC(1970, 0, 6+v)).toLocaleDateString(locale, { weekday: 'long' }));
console.log(getWeekDays('de-DE'));
_x000D_
You can deserialize directly to a list by using the TypeReference
wrapper. An example method:
public static <T> T fromJSON(final TypeReference<T> type,
final String jsonPacket) {
T data = null;
try {
data = new ObjectMapper().readValue(jsonPacket, type);
} catch (Exception e) {
// Handle the problem
}
return data;
}
And is used thus:
final String json = "";
Set<POJO> properties = fromJSON(new TypeReference<Set<POJO>>() {}, json);
Another solution you can use is SQL Developer.
With it, you have the ability to import from a csv file (other delimited files are available).
Just open the table view, then:
You have the option to have SQL Developer do the inserts for you, create an sql insert script, or create the data for a SQL Loader script (have not tried this option myself).
Of course all that is moot if you can only use the command line, but if you are able to test it with SQL Developer locally, you can always deploy the generated insert scripts (for example).
Just adding another option to the 2 already very good answers.
In Entity Framework 6.1+ you can use this attribute on your model:
[Index(IsUnique=true)]
You can find it in this namespace:
using System.ComponentModel.DataAnnotations.Schema;
If your model field is a string, make sure it is not set to nvarchar(MAX) in SQL Server or you will see this error with Entity Framework Code First:
Column 'x' in table 'dbo.y' is of a type that is invalid for use as a key column in an index.
The reason is because of this:
SQL Server retains the 900-byte limit for the maximum total size of all index key columns."
(from: http://msdn.microsoft.com/en-us/library/ms191241.aspx )
You can solve this by setting a maximum string length on your model:
[StringLength(450)]
Your model will look like this now in EF CF 6.1+:
public class User
{
public int UserId{get;set;}
[StringLength(450)]
[Index(IsUnique=true)]
public string UserName{get;set;}
}
Update:
if you use Fluent:
public class UserMap : EntityTypeConfiguration<User>
{
public UserMap()
{
// ....
Property(x => x.Name).IsRequired().HasMaxLength(450).HasColumnAnnotation("Index", new IndexAnnotation(new[] { new IndexAttribute("Index") { IsUnique = true } }));
}
}
and use in your modelBuilder:
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
// ...
modelBuilder.Configurations.Add(new UserMap());
// ...
}
Update 2
for EntityFrameworkCore see also this topic: https://github.com/aspnet/EntityFrameworkCore/issues/1698
Update 3
for EF6.2 see: https://github.com/aspnet/EntityFramework6/issues/274
Update 4
ASP.NET Core Mvc 2.2 with EF Core:
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Unique { get; set; }
This solution gives your answer plus additional properties. No JQuery or other dependencies required, paste and go.
Usage
getUrlParts("https://news.google.com/news/headlines/technology.html?ned=us&hl=en")
Output
{
"origin": "https://news.google.com",
"domain": "news.google.com",
"subdomain": "news",
"domainroot": "google.com",
"domainpath": "news.google.com/news/headlines",
"tld": ".com",
"path": "news/headlines/technology.html",
"query": "ned=us&hl=en",
"protocol": "https",
"port": 443,
"parts": [
"news",
"google",
"com"
],
"segments": [
"news",
"headlines",
"technology.html"
],
"params": [
{
"key": "ned",
"val": "us"
},
{
"key": "hl",
"val": "en"
}
]
}
Code
The code is designed to be easy to understand rather than super fast. It can be called easily 100 times per second, so it's great for front end or a few server usages, but not for high volume throughput.
function getUrlParts(fullyQualifiedUrl) {
var url = {},
tempProtocol
var a = document.createElement('a')
// if doesn't start with something like https:// it's not a url, but try to work around that
if (fullyQualifiedUrl.indexOf('://') == -1) {
tempProtocol = 'https://'
a.href = tempProtocol + fullyQualifiedUrl
} else
a.href = fullyQualifiedUrl
var parts = a.hostname.split('.')
url.origin = tempProtocol ? "" : a.origin
url.domain = a.hostname
url.subdomain = parts[0]
url.domainroot = ''
url.domainpath = ''
url.tld = '.' + parts[parts.length - 1]
url.path = a.pathname.substring(1)
url.query = a.search.substr(1)
url.protocol = tempProtocol ? "" : a.protocol.substr(0, a.protocol.length - 1)
url.port = tempProtocol ? "" : a.port ? a.port : a.protocol === 'http:' ? 80 : a.protocol === 'https:' ? 443 : a.port
url.parts = parts
url.segments = a.pathname === '/' ? [] : a.pathname.split('/').slice(1)
url.params = url.query === '' ? [] : url.query.split('&')
for (var j = 0; j < url.params.length; j++) {
var param = url.params[j];
var keyval = param.split('=')
url.params[j] = {
'key': keyval[0],
'val': keyval[1]
}
}
// domainroot
if (parts.length > 2) {
url.domainroot = parts[parts.length - 2] + '.' + parts[parts.length - 1];
// check for country code top level domain
if (parts[parts.length - 1].length == 2 && parts[parts.length - 1].length == 2)
url.domainroot = parts[parts.length - 3] + '.' + url.domainroot;
}
// domainpath (domain+path without filenames)
if (url.segments.length > 0) {
var lastSegment = url.segments[url.segments.length - 1]
var endsWithFile = lastSegment.indexOf('.') != -1
if (endsWithFile) {
var fileSegment = url.path.indexOf(lastSegment)
var pathNoFile = url.path.substr(0, fileSegment - 1)
url.domainpath = url.domain
if (pathNoFile)
url.domainpath = url.domainpath + '/' + pathNoFile
} else
url.domainpath = url.domain + '/' + url.path
} else
url.domainpath = url.domain
return url
}
ECMAScript 6 introduced the let
statement. You can use it in a for
statement.
var ids:string = [];
for(let result of this.results){
ids.push(result.Id);
}
As you become more experienced with using Perl, you'll find that there are fewer and fewer occasions when you need to run shell commands. For example, one way to get a list of files is to use Perl's built-in glob function. If you want the list in sorted order you could combine it with the built-in sort function. If you want details about each file, you can use the stat function. Here's an example:
#!/usr/bin/perl
use strict;
use warnings;
foreach my $file ( sort glob('/home/grant/*') ) {
my($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks)
= stat($file);
printf("%-40s %8u bytes\n", $file, $size);
}
I pasted your code into test project, added about 20 items and I get usable scroll bars, no problem, and they work as expected. When I only add a couple items (such that scrolling is unnecessary) I get no usable scrollbar. Could this be the case? that you are not adding enough items?
If you remove the ScrollViewer.VerticalScrollBarVisibility="Visible"
then the scroll bars only appear when you have need of them.
you can for example: set your environment variable path with php.exe folder e.g c:\program files\php
create a script file in d:\ with filename as a.php
open cmd: go to d: drive using d: command
type following command
php -f a.php
you will see the output
No one seems to be talking about performance so I tested the two most popular answers on a sample database from Mysql. The table has 2.8M rows with structure
CREATE TABLE `salaries` (
`emp_no` int(11) NOT NULL,
`salary` int(11) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ALTER TABLE `salaries`
ADD PRIMARY KEY (`emp_no`,`from_date`);
Here are the tests performed and results
SELECT * FROM `salaries` WHERE YEAR(from_date) = 1992 AND MONTH(from_date) = 6
12339 results
-----------------
11.5 ms
12.1 ms
09.5 ms
07.5 ms
10.2 ms
-----------------
10.2 ms Avg
-----------------
SELECT * FROM `salaries` WHERE from_date BETWEEN '1992-06-01' AND '1992-06-31'
-----------------
10.0 ms
10.8 ms
09.5 ms
09.0 ms
08.3 ms
-----------------
09.5 ms Avg
-----------------
SELECT * FROM `salaries` WHERE YEAR(to_date) = 1992 AND MONTH(to_date) = 6
10887 results
-----------------
10.2 ms
11.7 ms
11.8 ms
12.4 ms
09.6 ms
-----------------
11.1 ms Avg
-----------------
SELECT * FROM `salaries` WHERE to_date BETWEEN '1992-06-01' AND '1992-06-31'
-----------------
09.0 ms
07.5 ms
10.6 ms
11.7 ms
12.0 ms
-----------------
10.2 ms Avg
-----------------
My Conclusions
BETWEEN
was slightly better on both indexed and unindexed column.$("body").delegate("select[name='package_title']", "change", function() {
var price = $(this).find(':selected').attr('data-price');
var dadaday = $(this).find(':selected').attr('data-days');
var today = new Date();
var endDate = new Date();
endDate.setDate(today.getDate()+parseInt(dadaday));
var day = ("0" + endDate.getDate()).slice(-2)
var month = ("0" + (endDate.getMonth() + 1)).slice(-2)
var year = endDate.getFullYear();
var someFormattedDate = year+'-'+month+'-'+day;
$('#price_id').val(price);
$('#date_id').val(someFormattedDate);
});
See the docs for num.toStringAsFixed().
String toStringAsFixed(int fractionDigits)
Returns a decimal-point string-representation of this.
Converts this to a double before computing the string representation.
Examples:
1000000000000000000000.toStringAsExponential(3); // 1.000e+21
The parameter fractionDigits must be an integer satisfying: 0 <= fractionDigits <= 20.
Examples:
1.toStringAsFixed(3); // 1.000
(4321.12345678).toStringAsFixed(3); // 4321.123
(4321.12345678).toStringAsFixed(5); // 4321.12346
123456789012345678901.toStringAsFixed(3); // 123456789012345683968.000
1000000000000000000000.toStringAsFixed(3); // 1e+21
5.25.toStringAsFixed(0); // 5
You may need to change the permissions as an administrator. Open up terminal on your Mac and then open the directory that markers.xml is located in. Then type:
sudo chmod 777 markers.xml
You may be prompted for a password. Also, it could be the directories that don't allow full access. I'm not familiar with WordPress, so you may have to change the permission of each directory moving upward to the mysite directory.
Non programmatically, you can just open the archive using the 7zip UI to add/remove or extract/replace files without the structure changing. I didn't know it was a problem using other things until now :)
The single-step answer to the first question is to use something like:
update TBL set CLM = CLM + 1 where key = 'KEY'
That's very much a single-instruction way of doing it.
As for the second question, you shouldn't need to resort to DBMS-specific SQL gymnastics (like UPSERT
) to get the result you want. There's a standard method to do update-or-insert that doesn't require a specific DBMS.
try:
insert into TBL (key,val) values ('xyz',0)
catch:
do nothing
update TBL set val = val + 1 where key = 'xyz'
That is, you try to do the creation first. If it's already there, ignore the error. Otherwise you create it with a 0 value.
Then do the update which will work correctly whether or not:
It's not a single instruction and yet, surprisingly enough, it's how we've been doing it successfully for a long long time.
docker rmi $(docker images -a -q)
Stated the following images where in use. I think this command gets rid of unwanted images.
Try this:
Xvfb :21 -screen 0 1024x768x24 +extension RANDR &
Xvfb --help +extension name Enable extension -extension name Disable extension
For JPG Image compression you can use the best compression technique called JIC (Javascript Image Compression)This will definitely help you -->https://github.com/brunobar79/J-I-C
Try with array_merge_recursive
$A = array('a' => 1, 'b' => 2, 'c' => 3);
$B = array('c' => 4, 'd'=> 5);
$c = array_merge_recursive($A,$B);
echo "<pre>";
print_r($c);
echo "</pre>";
will return
Array
(
[a] => 1
[b] => 2
[c] => Array
(
[0] => 3
[1] => 4
)
[d] => 5
)
It is not a compilation error at all! You can import a default package to a default package class only.
If you do so for another package, then it shall be a compilation error.
You can use casting in the select clause like:
SELECT id, name, CAST(hide AS BOOLEAN) FROM table_name;
If the problem still persists even after putting the after build in the correct project try using "copy" instead of xcopy. This worked for me.
Lambas might be a solution
Integer[] nums = new Integer[] {1, 1, 2, 3, 3, 3};
List<Integer> list = Arrays.asList(nums);
List<Integer> dps = list.stream().distinct().filter(entry -> Collections.frequency(list, entry) > 1).collect(Collectors.toList());
You can use the get_group
method:
In [21]: gb.get_group('foo')
Out[21]:
A B C
0 foo 1.624345 5
2 foo -0.528172 11
4 foo 0.865408 14
Note: This doesn't require creating an intermediary dictionary / copy of every subdataframe for every group, so will be much more memory-efficient than creating the naive dictionary with dict(iter(gb))
. This is because it uses data-structures already available in the groupby object.
You can select different columns using the groupby slicing:
In [22]: gb[["A", "B"]].get_group("foo")
Out[22]:
A B
0 foo 1.624345
2 foo -0.528172
4 foo 0.865408
In [23]: gb["C"].get_group("foo")
Out[23]:
0 5
2 11
4 14
Name: C, dtype: int64
Update: this answer works with both ,Visual Sudio 2017 and 2019
For me it worked by the following three steps:
Adding Report viewer control by:
Going to NuGet Package Manager.
Installing Microsoft.ReportingServices.ReportViewerControl.Winforms
For WebForms applications:
Adding Report viewer control by:
Going to NuGet Package Manager.
Installing Microsoft.ReportingServices.ReportViewerControl.WebForms
That's all!
There is no way to delete or read the past history.
You could try going around it by emulating history in your own memory and calling history.pushState
everytime window popstate
event is emitted (which is proposed by the currently accepted Mike's answer), but it has a lot of disadvantages that will result in even worse UX than not supporting the browser history at all in your dynamic web app, because:
So even if you try going around it by building virtual history, it's very likely that it can also lead into a situation where you have blank history states (to which going back/forward does nothing), or where that going back/forward skips some of your history states totally.
You will need to define "special characters", but it's likely that for some string s
you mean:
import re
if re.match(r'^\w+$', s):
# s is good-to-go
You can use use both
recyclerViewInstance.findViewHolderForAdapterPosition(adapterPosition)
and
recyclerViewInstance.findViewHolderForLayoutPosition(layoutPosition)
.
Be sure that RecyclerView view uses two type of positions
Adapter position : Position of an item in the adapter. This is the position from the Adapter's perspective.
Layout position : Position of an item in the latest layout calculation. This is the position from the LayoutManager's perspective.
You should use getAdapterPosition()
for findViewHolderForAdapterPosition(adapterPosition)
and getLayoutPosition()
for findViewHolderForLayoutPosition(layoutPosition)
.
Take a member variable to hold previously selected item position in recyclerview adapter and other member variable to check whether user is clicking for first time or not.
Sample code and screen shots are attached for more information at the bottom.
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerList = null;
private RecyclerAdapter adapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerList = (RecyclerView) findViewById(R.id.recyclerList);
}
@Override
protected void onStart() {
RecyclerView.LayoutManager layoutManager = null;
String[] daysArray = new String[15];
String[] datesArray = new String[15];
super.onStart();
for (int i = 0; i < daysArray.length; i++){
daysArray[i] = "Sunday";
datesArray[i] = "12 Feb 2017";
}
adapter = new RecyclerAdapter(mRecyclerList, daysArray, datesArray);
layoutManager = new LinearLayoutManager(MainActivity.this);
mRecyclerList.setAdapter(adapter);
mRecyclerList.setLayoutManager(layoutManager);
}
}
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyCardViewHolder>{
private final String TAG = "RecyclerAdapter";
private Context mContext = null;
private TextView mDaysTxt = null, mDateTxt = null;
private LinearLayout mDateContainerLayout = null;
private String[] daysArray = null, datesArray = null;
private RecyclerView mRecyclerList = null;
private int previousPosition = 0;
private boolean flagFirstItemSelected = false;
public RecyclerAdapter(RecyclerView mRecyclerList, String[] daysArray, String[] datesArray){
this.mRecyclerList = mRecyclerList;
this.daysArray = daysArray;
this.datesArray = datesArray;
}
@Override
public MyCardViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = null;
View view = null;
MyCardViewHolder cardViewHolder = null;
mContext = parent.getContext();
layoutInflater = LayoutInflater.from(mContext);
view = layoutInflater.inflate(R.layout.date_card_row, parent, false);
cardViewHolder = new MyCardViewHolder(view);
return cardViewHolder;
}
@Override
public void onBindViewHolder(MyCardViewHolder holder, final int position) {
mDaysTxt = holder.mDaysTxt;
mDateTxt = holder.mDateTxt;
mDateContainerLayout = holder.mDateContainerLayout;
mDaysTxt.setText(daysArray[position]);
mDateTxt.setText(datesArray[position]);
if (!flagFirstItemSelected){
mDateContainerLayout.setBackgroundColor(Color.GREEN);
flagFirstItemSelected = true;
}else {
mDateContainerLayout.setBackground(null);
}
}
@Override
public int getItemCount() {
return daysArray.length;
}
class MyCardViewHolder extends RecyclerView.ViewHolder{
TextView mDaysTxt = null, mDateTxt = null;
LinearLayout mDateContainerLayout = null;
LinearLayout linearLayout = null;
View view = null;
MyCardViewHolder myCardViewHolder = null;
public MyCardViewHolder(View itemView) {
super(itemView);
mDaysTxt = (TextView) itemView.findViewById(R.id.daysTxt);
mDateTxt = (TextView) itemView.findViewById(R.id.dateTxt);
mDateContainerLayout = (LinearLayout) itemView.findViewById(R.id.dateContainerLayout);
mDateContainerLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
LinearLayout linearLayout = null;
View view = null;
if (getAdapterPosition() == previousPosition){
view = mRecyclerList.findViewHolderForAdapterPosition(previousPosition).itemView;
linearLayout = (LinearLayout) view.findViewById(R.id.dateContainerLayout);
linearLayout.setBackgroundColor(Color.GREEN);
previousPosition = getAdapterPosition();
}else {
view = mRecyclerList.findViewHolderForAdapterPosition(previousPosition).itemView;
linearLayout = (LinearLayout) view.findViewById(R.id.dateContainerLayout);
linearLayout.setBackground(null);
view = mRecyclerList.findViewHolderForAdapterPosition(getAdapterPosition()).itemView;
linearLayout = (LinearLayout) view.findViewById(R.id.dateContainerLayout);
linearLayout.setBackgroundColor(Color.GREEN);
previousPosition = getAdapterPosition();
}
}
});
}
}
I assume you found this code on Exercise 14: Prompting And Passing.
Do the following:
script = '*some arguments*'
user_name = '*some arguments*'
and that works perfectly
I was going through the Apple Developer last night and there in the Provisioning Certificate I found something like - "Signing Team Members". I think there is a way to add team members to the paid profile. You can just ask to the App Id Owner(paid one) to add you as a team member. I am not sure. Still searching on that.
You can do a printf to anything that is an OutputStream with a PrintStream. Somehow like this, printing into a string stream:
PrintStream ps = new PrintStream(baos);
ps.printf("there is a %s from %d %s", "hello", 3, "friends");
System.out.println(baos.toString());
baos.reset(); //need reset to write new string
ps.printf("there is a %s from %d %s", "flip", 5, "haters");
System.out.println(baos.toString());
baos.reset();
The string stream can be created like this ByteArrayOutputStream:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
I'm just using make with a simple makefile that looks like this:
JAVAC = javac -Xlint:unchecked
sources = $(shell find . -type f -name '*.java')
classes = $(sources:.java=.class)
all : $(classes)
clean :
rm -f $(classes)
%.class : %.java
$(JAVAC) $<
It compiles the sources one at a time and only recompiles if necessary.
This is what I use. I do this first query to find the sessions and the users:
select s.sid, s.serial#, p.spid, s.username, s.schemaname
, s.program, s.terminal, s.osuser
from v$session s
join v$process p
on s.paddr = p.addr
where s.type != 'BACKGROUND';
This will let me know if there are multiple sessions for the same user. Then I usually check to verify if a session is blocking the database.
SELECT SID, SQL_ID, USERNAME, BLOCKING_SESSION, COMMAND, MODULE, STATUS FROM v$session WHERE BLOCKING_SESSION IS NOT NULL;
Then I run an ALTER statement to kill a specific session in this format:
ALTER SYSTEM KILL SESSION 'sid,serial#';
For example:
ALTER SYSTEM KILL SESSION '314, 2643';
Aside from using floats, as others have suggested, you can also rely on a framework such as Bootstrap where you can use the "horizontal-form" class to have the label and input on the same line.
If you're unfamiliar with Bootstrap, you would need to include:
It's very straight forward and you wouldn't have to mess with floats or a ton of CSS for formatting, as you listed above.
<div id="form">
<div class="row">
<form action="" method="post" name="registration" class="register form-horizontal">
<fieldset>
<legend>Address Form</legend>
<div class="form-group">
<label for="Student" class="col-sm-2 control-label">Name:</label>
<div class="col-sm-6">
<input name="Student" class="form-control">
</div>
</div>
<div class="form-group">
<label for="Matric_no" class="col-sm-2 control-label">Matric number: </label>
<div class="col-sm-6">
<input name="Matric_no" class="form-control">
</div>
</div>
<div class="form-group">
<label for="Email" class="col-sm-2 control-label">Email: </label>
<div class="col-sm-6">
<input name="Email" class="form-control">
</div>
</div>
<div class="form-group">
<label for="Username" class="col-sm-2 control-label">Username: </label>
<div class="col-sm-6">
<input name="Username" class="form-control">
</div>
</div>
<div class="form-group">
<label for="Password" class="col-sm-2 control-label">Password: </label>
<div class="col-sm-6">
<input name="Password" type="password" class="form-control">
</div>
</div>
<div>
<button class="btn btn-info" name="regbutton" value="Register">Submit</button>
</div>
</fieldset>
</form>
</div>
</div>
</div>
An easy way to have access to the token, is to put the token in the LocalStorage or the AsyncStorage with React Native.
Below an example with a React Native project
authReducer.js
import { AsyncStorage } from 'react-native';
...
const auth = (state = initialState, action) => {
switch (action.type) {
case SUCCESS_LOGIN:
AsyncStorage.setItem('token', action.payload.token);
return {
...state,
...action.payload,
};
case REQUEST_LOGOUT:
AsyncStorage.removeItem('token');
return {};
default:
return state;
}
};
...
and api.js
import axios from 'axios';
import { AsyncStorage } from 'react-native';
const defaultHeaders = {
'Content-Type': 'application/json',
};
const config = {
...
};
const request = axios.create(config);
const protectedRequest = options => {
return AsyncStorage.getItem('token').then(token => {
if (token) {
return request({
headers: {
...defaultHeaders,
Authorization: `Bearer ${token}`,
},
...options,
});
}
return new Error('NO_TOKEN_SET');
});
};
export { request, protectedRequest };
For web you can use Window.localStorage
instead of AsyncStorage
if (card1.getRarity() < card2.getRarity()) {
return 1;
However, if card2.getRarity()
is less than card1.getRarity()
you might not return -1.
You similarly miss other cases. I would do this, you can change around depending on your intent:
public int compareTo(Object o) {
if(this == o){
return 0;
}
CollectionItem item = (CollectionItem) o;
Card card1 = CardCache.getInstance().getCard(cardId);
Card card2 = CardCache.getInstance().getCard(item.getCardId());
int comp=card1.getSet() - card2.getSet();
if (comp!=0){
return comp;
}
comp=card1.getRarity() - card2.getRarity();
if (comp!=0){
return comp;
}
comp=card1.getSet() - card2.getSet();
if (comp!=0){
return comp;
}
comp=card1.getId() - card2.getId();
if (comp!=0){
return comp;
}
comp=card1.getCardType() - card2.getCardType();
return comp;
}
}
I had to combine several of the answers to get a working solution.
This solution will:
Not navigate to http://mySite/#
<a href="#" (click)="!!functionToCall()">Link</a>
just to not forget the format
method
String s = String.format("%s%s%s%s%s", a, b, c, d, e);
(%1.1s%1.1s%1.1s%1.1s%1.1s
if you only want the first digit of each number...)
In addition to Felix's answer,
href={`/posts/${posts.id}`}
would work well too. This is nice because it's all in one string.
To find out if a string contains substring you can use the index
function:
if (index($str, $substr) != -1) {
print "$str contains $substr\n";
}
It will return the position of the first occurrence of $substr
in $str
, or -1 if the substring is not found.
The most efficient way to calculate a percentile of a stream that I have found is the P² algorithm: Raj Jain, Imrich Chlamtac: The P² Algorithm for Dynamic Calculation of Quantiiles and Histograms Without Storing Observations. Commun. ACM 28(10): 1076-1085 (1985)
The algorithm is straight forward to implement and works extremely well. It is an estimate, however, so keep that in mind. From the abstract:
A heuristic algorithm is proposed for dynamic calculation qf the median and other quantiles. The estimates are produced dynamically as the observations are generated. The observations are not stored; therefore, the algorithm has a very small and fixed storage requirement regardless of the number of observations. This makes it ideal for implementing in a quantile chip that can be used in industrial controllers and recorders. The algorithm is further extended to histogram plotting. The accuracy of the algorithm is analyzed.
You could use numpy.fromfile
, which can read data from both text and binary files. You would first construct a data type, which represents your file format, using numpy.dtype
, and then read this type from file using numpy.fromfile
.
So you use this:
var opt = {
autoOpen: false,
modal: true,
width: 550,
height:650,
title: 'Details'
};
var theDialog = $("#divDialog").dialog(opt);
theDialog.dialog("open");
and if you open a MVC Partial View in Dialog, you can create in index a hidden button and JQUERY click event:
$("#YourButton").click(function()
{
theDialog.dialog("open");
OR
theDialog.dialog("close");
});
then inside partial view html you call button trigger click like:
$("#YouButton").trigger("click")
see ya.
You need to use Regular Expression For Website URL it is
var urlPattern = /(http|ftp|https)://[\w-]+(.[\w-]+)+([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?/
Use this Expression as in example
var regex = new RegExp(urlPattern ); var t = 'www.google.com';
var res = t.match(regex /g);
For You have to pass your web page as string to this javascript in variable t and get array
this worked for me
sudo yarn install
A delegate is a reference to a method. Whereas objects can easily be sent as parameters into methods, constructor or whatever, methods are a bit more tricky. But every once in a while you might feel the need to send a method as a parameter to another method, and that's when you'll need delegates.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DelegateApp {
/// <summary>
/// A class to define a person
/// </summary>
public class Person {
public string Name { get; set; }
public int Age { get; set; }
}
class Program {
//Our delegate
public delegate bool FilterDelegate(Person p);
static void Main(string[] args) {
//Create 4 Person objects
Person p1 = new Person() { Name = "John", Age = 41 };
Person p2 = new Person() { Name = "Jane", Age = 69 };
Person p3 = new Person() { Name = "Jake", Age = 12 };
Person p4 = new Person() { Name = "Jessie", Age = 25 };
//Create a list of Person objects and fill it
List<Person> people = new List<Person>() { p1, p2, p3, p4 };
//Invoke DisplayPeople using appropriate delegate
DisplayPeople("Children:", people, IsChild);
DisplayPeople("Adults:", people, IsAdult);
DisplayPeople("Seniors:", people, IsSenior);
Console.Read();
}
/// <summary>
/// A method to filter out the people you need
/// </summary>
/// <param name="people">A list of people</param>
/// <param name="filter">A filter</param>
/// <returns>A filtered list</returns>
static void DisplayPeople(string title, List<Person> people, FilterDelegate filter) {
Console.WriteLine(title);
foreach (Person p in people) {
if (filter(p)) {
Console.WriteLine("{0}, {1} years old", p.Name, p.Age);
}
}
Console.Write("\n\n");
}
//==========FILTERS===================
static bool IsChild(Person p) {
return p.Age < 18;
}
static bool IsAdult(Person p) {
return p.Age >= 18;
}
static bool IsSenior(Person p) {
return p.Age >= 65;
}
}
}
Children:
Jake, 12 years old
Adults:
John, 41 years old
Jane, 69 years old
Jessie, 25 years old
Seniors:
Jane, 69 years old
Reading the file
import scipy.io
mat = scipy.io.loadmat(file_name)
Inspecting the type of MAT variable
print(type(mat))
#OUTPUT - <class 'dict'>
The keys inside the dictionary are MATLAB variables, and the values are the objects assigned to those variables.
You wont be able to do this from the client side because of the Same Origin Policy set by the browsers. You wont be able to get much information from the iFrame other than basic properties like its width and height.
Also, google sets in its response header an 'X-Frame-Options' of SAMEORIGIN.
Even if you did an ajax call to google you wont be able to inspect the response because the browser enforcing Same Origin Policy.
So, the only option is to make the request from your server to see if you can display the site in your IFrame.
So, on your server.. your web app would make a request to www.google.com and then inspect the response to see if it has a header argument of X-Frame-Options. If it does exist then you know the IFrame will error.
Usually in ruby when you are looking for "type" you are actually wanting the "duck-type" or "does is quack like a duck?". You would see if it responds to a certain method:
@some_var.respond_to?(:each)
You can iterate over @some_var because it responds to :each
If you really want to know the type and if it is Hash or Array then you can do:
["Hash", "Array"].include?(@some_var.class) #=> check both through instance class
@some_var.kind_of?(Hash) #=> to check each at once
@some_var.is_a?(Array) #=> same as kind_of
Some gotchas to watch out for:
If you double-click the batch file %0
will be surrounded by quotes. For example, if you save this file as c:\test.bat
:
@echo %0
@pause
Double-clicking it will open a new command prompt with output:
"C:\test.bat"
But if you first open a command prompt and call it directly from that command prompt, %0
will refer to whatever you've typed. If you type test.bat
Enter, the output of %0
will have no quotes because you typed no quotes:
c:\>test.bat
test.bat
If you type test
Enter, the output of %0
will have no extension too, because you typed no extension:
c:\>test
test
Same for tEsT
Enter:
c:\>tEsT
tEsT
If you type "test"
Enter, the output of %0
will have quotes (since you typed them) but no extension:
c:\>"test"
"test"
Lastly, if you type "C:\test.bat"
, the output would be exactly as though you've double clicked it:
c:\>"C:\test.bat"
"C:\test.bat"
Note that these are not all the possible values %0
can be because you can call the script from other folders:
c:\some_folder>/../teST.bAt
/../teST.bAt
All the examples shown above will also affect %~0
, because the output of %~0
is simply the output of %0
minus quotes (if any).
add
credits: {
enabled: false
}
[NOTE] that it is in the same line with
xAxis: {}
and yAxis: {}
Regex.Unescape(string) method converts any escaped characters in the input string.
The Unescape method performs one of the following two transformations:
It reverses the transformation performed by the Escape method by removing the escape character ("\") from each character escaped by the method. These include the \, *, +, ?, |, {, [, (,), ^, $, ., #, and white space characters. In addition, the Unescape method unescapes the closing bracket (]) and closing brace (}) characters.
It replaces the hexadecimal values in verbatim string literals with the actual printable characters. For example, it replaces @"\x07" with "\a", or @"\x0A" with "\n". It converts to supported escape characters such as \a, \b, \e, \n, \r, \f, \t, \v, and alphanumeric characters.
string str = @"a\\b\\c";
var output = System.Text.RegularExpressions.Regex.Unescape(str);
Reference:
I've always believed it was there more for the understanding that you can mix ASP.NET tags and HTML Tags, and HTML Tags have the option of either being runat="server"
or not. It doesn't hurt anything to leave the tag in, and it causes a compiler error to take it out. The more things you imply about web language, the less easy it is for a budding programmer to come in and learn it. That's as good a reason as any to be verbose about tag attributes.
This conversation was had on Mike Schinkel's Blog between himself and Talbot Crowell of Microsoft National Services. The relevant information is below (first paragraph paraphrased due to grammatical errors in source):
[...] but the importance of
<runat="server">
is more for consistency and extensibility.If the developer has to mark some tags (viz.
<asp: />
) for the ASP.NET Engine to ignore, then there's also the potential issue of namespace collisions among tags and future enhancements. By requiring the<runat="server">
attribute, this is negated.
It continues:
If
<runat=client>
was required for all client-side tags, the parser would need to parse all tags and strip out the<runat=client>
part.
He continues:
Currently, If my guess is correct, the parser simply ignores all text (tags or no tags) unless it is a tag with the
runat=server
attribute or a “<%
” prefix or ssi “<!– #include
… (...) Also, since ASP.NET is designed to allow separation of the web designers (foo.aspx) from the web developers (foo.aspx.vb), the web designers can use their own web designer tools to place HTML and client-side JavaScript without having to know about ASP.NET specific tags or attributes.
cmd -> right click -> Run as administrator
C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
The column name plays an important role in the descending order:
select <COLUMN_NAME1, COLUMN_NAME2> from >TABLENAME> ORDER BY <COLUMN_NAME THAT MENTIONS TIME> DESC LIMIT 1;
For example: The below-mentioned table(user_details) consists of the column name 'created_at' that has timestamp for the table.
SELECT userid, username FROM user_details ORDER BY created_at DESC LIMIT 1;
Very annoying, no cookie file exmpale on the official website https://ec.haxx.se/http/http-cookies.
Finnaly, I find it does not work, if your file content is just copyied like this
foo1=bar;foo2=bar2
I gusess the format must looks the style said by @Agustí Sánchez . You can test it by -c to create a cookie file on a website.
So try this way, it works
curl -H "Cookie:`cat ./my.cookie`" http://xxxx.com
You can just copy the cookie from chrome console network tab.
This will return what you asked, but I wouldnt recommend using css like this. Use external CSS instead of inline css.
$("tr[id='pDetails']").attr("style").split(':')[1];
I wanted to comment, but since my reputation won't qualify for commenting, it had to be an answer. Github will actually let you not only cancel a pull request, but also delete it by simply deleting the fork you are trying to push. Hope this may help some others googling this.
For PyTorch v1.0 and possibly above:
>>> import torch
>>> var = torch.tensor([[1,0], [0,1]])
# Using .size function, returns a torch.Size object.
>>> var.size()
torch.Size([2, 2])
>>> type(var.size())
<class 'torch.Size'>
# Similarly, using .shape
>>> var.shape
torch.Size([2, 2])
>>> type(var.shape)
<class 'torch.Size'>
You can cast any torch.Size object to a native Python list:
>>> list(var.size())
[2, 2]
>>> type(list(var.size()))
<class 'list'>
In PyTorch v0.3 and 0.4:
Simply list(var.size())
, e.g.:
>>> import torch
>>> from torch.autograd import Variable
>>> from torch import IntTensor
>>> var = Variable(IntTensor([[1,0],[0,1]]))
>>> var
Variable containing:
1 0
0 1
[torch.IntTensor of size 2x2]
>>> var.size()
torch.Size([2, 2])
>>> list(var.size())
[2, 2]
Using REQUIRES_NEW
is only relevant when the method is invoked from a transactional context; when the method is invoked from a non-transactional context, it will behave exactly as REQUIRED
- it will create a new transaction.
That does not mean that there will only be one single transaction for all your clients - each client will start from a non-transactional context, and as soon as the the request processing will hit a @Transactional
, it will create a new transaction.
So, with that in mind, if using REQUIRES_NEW
makes sense for the semantics of that operation - than I wouldn't worry about performance - this would textbook premature optimization - I would rather stress correctness and data integrity and worry about performance once performance metrics have been collected, and not before.
On rollback - using REQUIRES_NEW
will force the start of a new transaction, and so an exception will rollback that transaction. If there is also another transaction that was executing as well - that will or will not be rolled back depending on if the exception bubbles up the stack or is caught - your choice, based on the specifics of the operations.
Also, for a more in-depth discussion on transactional strategies and rollback, I would recommend: «Transaction strategies: Understanding transaction pitfalls», Mark Richards.
Follow these steps to get UTC time of any timezone set in user's local system (This will be required for web applications to save different timezones to UTC):
Javascript (client-side):
var dateVar = new Date();
var offset = dateVar.getTimezoneOffset();
//getTimezoneOffset - returns the timezone difference between UTC and Local Time
document.cookie = "offset="+offset;
Php (server-side):
public function convert_utc_time($date)
{
$time_difference = isset($_COOKIE['offset'])?$_COOKIE['offset']:'';
if($time_difference != ''){
$time = strtotime($date);
$time = $time + ($time_difference*60); //minutes * 60 seconds
$date = date("Y-m-d H:i:s", $time);
} //on failure of js, default timezone is set as UTC below
return $date;
}
..
..
//in my function
$timezone = 'UTC';
$date = $this->convert_utc_time($post_date); //$post_date('Y-m-d H:i:s')
echo strtotime($date. ' '. $timezone)
A more straight forward way is to check for equality
if string1 == string2
puts "match"
else
puts "not match"
end
however, if you really want to stick to regular expression,
string1 =~ /^123456$/
It exists, but it's hard to search for. I think most people call it the "splat" operator.
It's in the documentation as "Unpacking argument lists".
You'd use it like this: foo(*values)
. There's also one for dictionaries:
d = {'a': 1, 'b': 2}
def foo(a, b):
pass
foo(**d)
I'm guessing you did not want to use a breakpoint because it will always break the line. Is that correct? If so how about adding a breakpoint <br />
in your text, then giving it a class like <br class="hidebreak"/>
then using media query right above the size you want it to break to hide the <br />
so it breaks at a specific width but stays inline above that width.
HTML:
<p>
The below line breaks at 766px.
</p>
<p>
This is the line of text<br class="hidebreak"> I want to break.
</p>
CSS:
@media (min-width: 767px) {
br.hidebreak {display:none;}
}
I hope this can help someone. Determine the nav offset through js and then apply sticky position css to nav:
But first, we will define the styles in the stylesheet, like so.
.sticky {
position: fixed;
width: 100%;
left: 0;
top: 0;
z-index: 100;
border-top: 0;
}
Then, we will apply that class to the navigation conditionally with jQuery.
$(document).ready(function() {
var stickyNavTop = $('.nav').offset().top;
var stickyNav = function(){
var scrollTop = $(window).scrollTop();
if (scrollTop > stickyNavTop) {
$('.nav').addClass('sticky');
} else {
$('.nav').removeClass('sticky');
}
};
stickyNav();
$(window).scroll(function() {
stickyNav();
});
});
Here's an example of how you'd use filter
within your AngularJS JavaScript (rather than in an HTML element).
In this example, we have an array of Country records, each containing a name and a 3-character ISO code.
We want to write a function which will search through this list for a record which matches a specific 3-character code.
Here's how we'd do it without using filter
:
$scope.FindCountryByCode = function (CountryCode) {
// Search through an array of Country records for one containing a particular 3-character country-code.
// Returns either a record, or NULL, if the country couldn't be found.
for (var i = 0; i < $scope.CountryList.length; i++) {
if ($scope.CountryList[i].IsoAlpha3 == CountryCode) {
return $scope.CountryList[i];
};
};
return null;
};
Yup, nothing wrong with that.
But here's how the same function would look, using filter
:
$scope.FindCountryByCode = function (CountryCode) {
// Search through an array of Country records for one containing a particular 3-character country-code.
// Returns either a record, or NULL, if the country couldn't be found.
var matches = $scope.CountryList.filter(function (el) { return el.IsoAlpha3 == CountryCode; })
// If 'filter' didn't find any matching records, its result will be an array of 0 records.
if (matches.length == 0)
return null;
// Otherwise, it should've found just one matching record
return matches[0];
};
Much neater.
Remember that filter
returns an array as a result (a list of matching records), so in this example, we'll either want to return 1 record, or NULL.
Hope this helps.
with GNU-grep you could just say
grep --context=10 ...
You can set the "background image" to an activity by setting android:background
xml attributes as followings:
(Here, for example, Take a LinearLayout for an activity and setting a background image for the layout(i.e. indirectly to an activity))
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="@drawable/icon">
</LinearLayout>
Use:
IF Var IS NULL THEN
var := 5;
END IF;
Oracle 9i+:
var = COALESCE(Var, 5)
Other alternatives:
var = NVL(var, 5)
Reference:
The correct way to do this is:
String[] stockArr = stock_list.toArray(new String[stock_list.size()]);
I'd like to add to the other great answers here and explain how you could have used the Javadocs to answer your question.
The Javadoc for toArray()
(no arguments) is here. As you can see, this method returns an Object[]
and not String[]
which is an array of the runtime type of your list:
public Object[] toArray()
Returns an array containing all of the elements in this collection. If the collection makes any guarantees as to what order its elements are returned by its iterator, this method must return the elements in the same order. The returned array will be "safe" in that no references to it are maintained by the collection. (In other words, this method must allocate a new array even if the collection is backed by an Array). The caller is thus free to modify the returned array.
Right below that method, though, is the Javadoc for toArray(T[] a)
. As you can see, this method returns a T[]
where T
is the type of the array you pass in. At first this seems like what you're looking for, but it's unclear exactly why you're passing in an array (are you adding to it, using it for just the type, etc). The documentation makes it clear that the purpose of the passed array is essentially to define the type of array to return (which is exactly your use case):
public <T> T[] toArray(T[] a)
Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array. If the collection fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the specified array and the size of this collection. If the collection fits in the specified array with room to spare (i.e., the array has more elements than the collection), the element in the array immediately following the end of the collection is set to null. This is useful in determining the length of the collection only if the caller knows that the collection does not contain any null elements.)
If this collection makes any guarantees as to what order its elements are returned by its iterator, this method must return the elements in the same order.
This implementation checks if the array is large enough to contain the collection; if not, it allocates a new array of the correct size and type (using reflection). Then, it iterates over the collection, storing each object reference in the next consecutive element of the array, starting with element 0. If the array is larger than the collection, a null is stored in the first location after the end of the collection.
Of course, an understanding of generics (as described in the other answers) is required to really understand the difference between these two methods. Nevertheless, if you first go to the Javadocs, you will usually find your answer and then see for yourself what else you need to learn (if you really do).
Also note that reading the Javadocs here helps you to understand what the structure of the array you pass in should be. Though it may not really practically matter, you should not pass in an empty array like this:
String [] stockArr = stockList.toArray(new String[0]);
Because, from the doc, this implementation checks if the array is large enough to contain the collection; if not, it allocates a new array of the correct size and type (using reflection). There's no need for the extra overhead in creating a new array when you could easily pass in the size.
As is usually the case, the Javadocs provide you with a wealth of information and direction.
Hey wait a minute, what's reflection?
three different approaches:
Classic client/server approach: don't put any database in the shops; simply have the applications access your server. Of course it's better if you set a VPN, but simply wrapping the connection in SSL or ssh is reasonable. Pro: it's the way databases were originally thought. Con: if you have high latency, complex operations could get slow, you might have to use stored procedures to reduce the number of round trips.
replicated master/master: as @Book Of Zeus suggested. Cons: somewhat more complex to setup (especially if you have several shops), breaking in any shop machine could potentially compromise the whole system. Pros: better responsivity as read operations are totally local and write operations are propagated asynchronously.
offline operations + sync step: do all work locally and from time to time (might be once an hour, daily, weekly, whatever) write a summary with all new/modified records from the last sync operation and send to the server. Pros: can work without network, fast, easy to check (if the summary is readable). Cons: you don't have real-time information.
Use ifelse
:
frame$twohouses <- ifelse(frame$data>=2, 2, 1)
frame
data twohouses
1 0 1
2 1 1
3 2 2
4 3 2
5 4 2
...
16 0 1
17 2 2
18 1 1
19 2 2
20 0 1
21 4 2
The difference between if
and ifelse
:
if
is a control flow statement, taking a single logical value as an argumentifelse
is a vectorised function, taking vectors as all its arguments.The help page for if
, accessible via ?"if"
will also point you to ?ifelse
To make a tar progress bar
tar xzvf pippo.tgz |xargs -L 19 |xargs -I@ echo -n "."
Where "19" is the number of files in the tar divided the length of the intended progress bar. Example: the .tgz contains 140 files and you'll want a progress bar of 76 ".", you can put -L 2.
You'll need nothing else.
d = {"name":"interpolator",
"children":[{'name':key,"size":value} for key,value in sample.items()]}
json_string = json.dumps(d)
Of course, it's unlikely that the order will be exactly preserved ... But that's just the nature of dictionaries ...
If you want something a little bit more readable, you can try this:
<button @click="[click1($event), click2($event)]">
Multiple
</button>
To me, this solution feels more Vue-like hope you enjoy
One of the first things you need to learn about SQL (and relational databases) is that you shouldn't store multiple values in a single field.
You should create another table and store one value per row.
This will make your querying easier, and your database structure better.
select
case when exists (select countryname from itemcountries where yourtable.id=itemcountries.id and countryname = @country) then 'national' else 'regional' end
from yourtable
You will get useful information from here.
SELECT ticker
INTO quotedb
FROM tickerdb;
Idle Timeout is if no action has been asked from your web app, it the process will drop and release everything from memory
Recycle is a forced action on the application where your processed is closed and started again, for memory leaking purposes and system health
The negative impact of both is usually the use of your Session and Application state is lost if you mess with Recycle to a faster time.(logged in users etc will be logged out, if they where about to "check out" all would have been lost" that's why recycle is at such a large time out value, idle timeout doesn't matter because nobody is logged in anyway and figure 20 minutes an no action they are not still "shopping"
The positive would be get rid of the idle time out as your website will respond faster on its "first" response if its not a highly active site where a user would have to wait for it to load if you have 1 user every 20 minutes lets say. So a website that get his less then 1 time in 20 minutes actually you would want to increase this value as the website has to load up again from scratch for each user. but if you set this to 0 over a long time, any memory leaks in code could over a certain amount of time, entirely take over the server.
See the documentation on MDN about expressions and operators and statements.
this
keyword:var x = function()
vs. function x()
— Function declaration syntax(function(){
…})()
— IIFE (Immediately Invoked Function Expression)(function(){…})();
work but function(){…}();
doesn't?(function(){…})();
vs (function(){…}());
!function(){…}();
- What does the exclamation mark do before the function?+function(){…}();
- JavaScript plus sign in front of function expression!
vs leading semicolon(function(window, undefined){…}(window));
someFunction()()
— Functions which return other functions=>
— Equal sign, greater than: arrow function expression syntax|>
— Pipe, greater than: Pipeline operatorfunction*
, yield
, yield*
— Star after function
or yield
: generator functions[]
, Array()
— Square brackets: array notationIf the square brackets appear on the left side of an assignment ([a] = ...
), or inside a function's parameters, it's a destructuring assignment.
{key: value}
— Curly brackets: object literal syntax (not to be confused with blocks)If the curly brackets appear on the left side of an assignment ({ a } = ...
) or inside a function's parameters, it's a destructuring assignment.
`
…${
…}
…`
— Backticks, dollar sign with curly brackets: template literals`…${…}…`
code from the node docs mean?/
…/
— Slashes: regular expression literals$
— Dollar sign in regex replace patterns: $$
, $&
, $`
, $'
, $n
()
— Parentheses: grouping operatorobj.prop
, obj[prop]
, obj["prop"]
— Square brackets or dot: property accessors?.
, ?.[]
, ?.()
— Question mark, dot: optional chaining operator::
— Double colon: bind operatornew
operator...iter
— Three dots: spread syntax; rest parameters(...args) => {}
— What is the meaning of “…args” (three dots) in a function definition?[...iter]
— javascript es6 array feature […data, 0] “spread operator”{...props}
— Javascript Property with three dots (…)++
, --
— Double plus or minus: pre- / post-increment / -decrement operatorsdelete
operatorvoid
operator+
, -
— Plus and minus: addition or concatenation, and subtraction operators; unary sign operators|
, &
, ^
, ~
— Single pipe, ampersand, circumflex, tilde: bitwise OR, AND, XOR, & NOT operators~1
equal -2
?%
— Percent sign: remainder operator&&
, ||
, !
— Double ampersand, double pipe, exclamation point: logical operators??
— Double question mark: nullish-coalescing operator**
— Double star: power operator (exponentiation)x ** 2
is equivalent to Math.pow(x, 2)
==
, ===
— Equal signs: equality operators!=
, !==
— Exclamation point and equal signs: inequality operators<<
, >>
, >>>
— Two or three angle brackets: bit shift operators?
…:
… — Question mark and colon: conditional (ternary) operator=
— Equal sign: assignment operator%=
— Percent equals: remainder assignment+=
— Plus equals: addition assignment operator&&=
, ||=
, ??=
— Double ampersand, pipe, or question mark, followed by equal sign: logical assignments||=
(or equals) in JavaScript?,
— Comma operator{
…}
— Curly brackets: blocks (not to be confused with object literal syntax)var
, let
, const
— Declaring variableslabel:
— Colon: labels#
— Hash (number sign): Private methods or private fieldsHere's a function that'll do it:
def totuple(a):
try:
return tuple(totuple(i) for i in a)
except TypeError:
return a
And an example:
>>> array = numpy.array(((2,2),(2,-2)))
>>> totuple(array)
((2, 2), (2, -2))
Once changes has been committed it will not be able to delete. because commit's basic nature is not to delete.
Thing you can do (easy and safe method),
Interactive Rebase:
1) git rebase -i HEAD~2
#will show your recent 2 commits
2) Your commit will list like , Recent will appear at the bottom of the page LILO(last in Last Out)
Delete the last commit row entirely
3) save it by ctrl+X
or ESC:wq
now your branch will updated without your last commit..
I tried about three different ways of intercepting the construction of the Ajax object:
xhrFields
, but that only allows for one listener, only attaches to download (not upload) progress, and requires what seems like unnecessary copy-and-paste. progress
function to the returned promise, but I had to maintain my own array of handlers. I could not find a good object to attach the handlers because one place I'd access to the XHR and another I'd have access to the jQuery XHR, but I never had access to the deferred object (only its promise). ajax
with my own. The only potential shortcoming is you can no longer use your own xhr()
setting. You can allow for that by checking to see whether options.xhr
is a function.I actually call my promise.progress
function xhrProgress
so I can easily find it later. You might want to name it something else to separate your upload and download listeners. I hope this helps someone even if the original poster already got what he needed.
(function extend_jQuery_ajax_with_progress( window, jQuery, undefined )
{
var $originalAjax = jQuery.ajax;
jQuery.ajax = function( url, options )
{
if( typeof( url ) === 'object' )
{options = url;url = undefined;}
options = options || {};
// Instantiate our own.
var xmlHttpReq = $.ajaxSettings.xhr();
// Make it use our own.
options.xhr = function()
{return( xmlHttpReq );};
var $newDeferred = $.Deferred();
var $oldPromise = $originalAjax( url, options )
.done( function done_wrapper( response, text_status, jqXHR )
{return( $newDeferred.resolveWith( this, arguments ));})
.fail( function fail_wrapper( jqXHR, text_status, error )
{return( $newDeferred.rejectWith( this, arguments ));})
.progress( function progress_wrapper()
{
window.console.warn( "Whoa, jQuery started actually using deferred progress to report Ajax progress!" );
return( $newDeferred.notifyWith( this, arguments ));
});
var $newPromise = $newDeferred.promise();
// Extend our own.
$newPromise.progress = function( handler )
{
xmlHttpReq.addEventListener( 'progress', function download_progress( evt )
{
//window.console.debug( "download_progress", evt );
handler.apply( this, [evt]);
}, false );
xmlHttpReq.upload.addEventListener( 'progress', function upload_progress( evt )
{
//window.console.debug( "upload_progress", evt );
handler.apply( this, [evt]);
}, false );
return( this );
};
return( $newPromise );
};
})( window, jQuery );
That's actually quite easy.
document.querySelector('#input-field').value = '';
You need to alter your table. Increase the column width using a DDL statement.
please see here
http://dba-oracle.com/t_alter_table_modify_column_syntax_example.htm
When you export you use the compatibility system set to MYSQL40
. Worked for me.
I spent quite a lot of time figuring out how to do this in Intellij 13x. I apparently never added the properties files to the artifacts that required them, which is a separate step in Intellij. The setup below also works when you have a properties file that is shared by multiple modules.
Github recently released a cli utility called github-cli. After installing it, you can checkout a pull request's branch locally by using its id (ref)
e.g: gh pr checkout 2267
This works with forks as well but if you then need to push back to the fork, you'll need to add the remote repository and use traditional git push
(until this ticket gets implemented in gh utility)
The read
in your script command is fine. However, you execute it in the pipeline, which means it is in a subshell, therefore, the variables it reads to are not visible in the parent shell. You can either
move the rest of the script in the subshell, too:
echo hello | { read str
echo $str
}
or use command substitution to get the value of the variable out of the subshell
str=$(echo hello)
echo $str
or a slightly more complicated example (Grabbing the 2nd element of ls)
str=$(ls | { read a; read a; echo $a; })
echo $str
The datepicker('setDate') sets the date in the datepicket not in the input.
You should add the date and set it in the input.
var date2 = $('.pickupDate').datepicker('getDate');
var nextDayDate = new Date();
nextDayDate.setDate(date2.getDate() + 1);
$('input').val(nextDayDate);
I rely heavily on commands like this.
python -c 'import sys; print(sys.maxsize)'
Max int returned: 9223372036854775807
For more references for 'sys' you should access
There's always reduce (being deprecated to functools):
>>> x = [ [ 'a', 'b'], ['c'] ]
>>> for el in reduce(lambda a,b: a+b, x, []):
... print el
...
__main__:1: DeprecationWarning: reduce() not supported in 3.x; use functools.reduce()
a
b
c
>>> import functools
>>> for el in functools.reduce(lambda a,b: a+b, x, []):
... print el
...
a
b
c
>>>
Unfortunately the plus operator for list concatenation can't be used as a function -- or fortunate, if you prefer lambdas to be ugly for improved visibility.
Effectively, the IN statement creates a series of OR statements... so
SELECT * FROM table WHERE column IN (1, 2, 3)
Is effectively
SELECT * FROM table WHERE column = 1 OR column = 2 OR column = 3
And sadly, that is the route you'll have to take with your LIKE statements
SELECT * FROM table
WHERE column LIKE 'Text%' OR column LIKE 'Hello%' OR column LIKE 'That%'
First things first. C, i.e. ISO/IEC 9899 has had a boolean type for 19 years now. That is way longer time than the expected length of the C programming career with amateur/academic/professional parts combined when visiting this question. Mine does surpass that by mere perhaps 1-2 years. It means that during the time that an average reader has learnt anything at all about C, C actually has had the boolean data type.
For the datatype, #include <stdbool.h>
, and use true
, false
and bool
. Or do not include it, and use _Bool
, 1
and 0
instead.
There are various dangerous practices promoted in the other answers to this thread. I will address them:
typedef int bool;
#define true 1
#define false 0
This is no-no, because a casual reader - who did learn C within those 19 years - would expect that bool
refers to the actual bool
data type and would behave similarly, but it doesn't! For example
double a = ...;
bool b = a;
With C99 bool
/ _Bool
, b
would be set to false
iff a
was zero, and true
otherwise. C11 6.3.1.2p1
- When any scalar value is converted to
_Bool
, the result is 0 if the value compares equal to 0; otherwise, the result is 1. 59)Footnotes
59) NaNs do not compare equal to 0 and thus convert to 1.
With the typedef
in place, the double
would be coerced to an int
- if the value of the double isn't in the range for int
, the behaviour is undefined.
Naturally the same applies to if true
and false
were declared in an enum
.
What is even more dangerous is declaring
typedef enum bool {
false, true
} bool;
because now all values besides 1 and 0 are invalid, and should such a value be assigned to a variable of that type, the behaviour would be wholly undefined.
Therefore iff you cannot use C99 for some inexplicable reason, for boolean variables you should use:
int
and values 0
and 1
as-is; and carefully do domain conversions from any other values to these with double negation !!
BOOL
, TRUE
and FALSE
!Easy:
SELECT question_id, wm_concat(element_id) as elements
FROM questions
GROUP BY question_id;
Pesonally tested on 10g ;-)
From http://www.oracle-base.com/articles/10g/StringAggregationTechniques.php
In the latest version of pandas (0.19.2
) you can directly pass the url
import pandas as pd
url="https://raw.githubusercontent.com/cs109/2014_data/master/countries.csv"
c=pd.read_csv(url)
Use bases if you just want to get the parents, use __mro__
(as pointed out by @naught101) for getting the method resolution order (so to know in which order the init's were executed).
Bases (and first getting the class for an existing object):
>>> some_object = "some_text"
>>> some_object.__class__.__bases__
(object,)
For mro in recent Python versions:
>>> some_object = "some_text"
>>> some_object.__class__.__mro__
(str, object)
Obviously, when you already have a class definition, you can just call __mro__
on that directly:
>>> class A(): pass
>>> A.__mro__
(__main__.A, object)
Set divider to null:
JAVA
listview_id.setDivider(null);
XML
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"
/>
if you use the preset for react-native it accepts the import
npm i babel-preset-react-native --save-dev
and put it inside your .babelrc file
{
"presets": ["react-native"]
}
in your project root directory
"react-router-dom": "^5.0.0",
you do not need to add any additional module, just in your component that has a url address like this:
http://localhost:3000/#/?authority'
you can try the following simple code:
const search =this.props.location.search;
const params = new URLSearchParams(search);
const authority = params.get('authority'); //
Not tested, but something like this:
var now = new Date();
var str = now.getUTCFullYear().toString() + "/" +
(now.getUTCMonth() + 1).toString() +
"/" + now.getUTCDate() + " " + now.getUTCHours() +
":" + now.getUTCMinutes() + ":" + now.getUTCSeconds();
Of course, you'll need to pad the hours, minutes, and seconds to two digits or you'll sometimes get weird looking times like "2011/12/2 19:2:8."
$('#el').prop('disabled', function(i, v) { return !v; });
The .prop()
method accepts two arguments:
So in this case, I used a function that supplied me the index (i) and the current value (v), then I returned the opposite of the current value, so the property state is reversed.
Try this approach using the newer str.format
syntax:
line_new = '{:>12} {:>12} {:>12}'.format(word[0], word[1], word[2])
And here's how to do it using the old %
syntax (useful for older versions of Python that don't support str.format
):
line_new = '%12s %12s %12s' % (word[0], word[1], word[2])
If you prefer a one-liner:
matched_lines = [line for line in my_string.split('\n') if "substring" in line]
Not exactly an answer to the quoting/escaping problem of the original question but probably something that would actually have been more useful for the op:
unset FILES
for f in 2011-*.jpg; do FILES+=("$f"); done
echo "${FILES[@]}"
Where of course the expression would have to be adopted to the specific requirement (e.g. *.jpg
for all or 2001-09-11*.jpg
for only the pictures of a certain day).
Does it really have to be a thread, or can it be a task too?
if so, the easiest way is:
Task.Factory.StartNew(() => SecondFoo())
Try writing the file path as "C:\\Users\miche\Documents\school\jaar2\MIK\2.6\vektis_agb_zorgverlener"
i.e with double backslash after the drive as opposed to "C:\Users\miche\Documents\school\jaar2\MIK\2.6\vektis_agb_zorgverlener"
Ensure Microsoft.EntityFrameworkCore.Tools
is referenced in the dependencies
section of your project.json
. NuGet won't load the Package Manager Commands from the tools
section. (See NuGet/Home#3023)
{
"dependencies": {
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
}
}
}
$emit
It dispatches an event name upwards through the scope hierarchy and notify to the registered $rootScope.Scope
listeners. The event life cycle starts at the scope on which $emit
was called. The event traverses upwards toward the root scope and calls all registered listeners along the way. The event will stop propagating if one of the listeners cancels it.
$broadcast
It dispatches an event name downwards to all child scopes (and their children) and notify to the registered $rootScope.Scope
listeners. The event life cycle starts at the scope on which $broadcast
was called. All listeners for the event on this scope get notified. Afterwards, the event traverses downwards toward the child scopes and calls all registered listeners along the way. The event cannot be canceled.
$on
It listen on events of a given type. It can catch the event dispatched by $broadcast
and $emit
.
Visual demo:
Demo working code, visually showing scope tree (parent/child relationship):
http://plnkr.co/edit/am6IDw?p=preview
Demonstrates the method calls:
$scope.$on('eventEmitedName', function(event, data) ...
$scope.broadcastEvent
$scope.emitEvent
If you have php 5.3+, you can use an anonymous function like so:
add_filter( 'login_redirect', function() { return site_url('news'); } );
You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_name FROM table_name) AS temp;
This is much faster than:
COUNT(DISTINCT column_name)
Big screen:
Small screen (Mobile)
if this is what you wanted this is code https://plnkr.co/edit/PCCJb9f7f93HT4OubLmM?p=preview
CSS + HTML + JQUERY :
_x000D_
@import "https://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700";_x000D_
body {_x000D_
font-family: 'Poppins', sans-serif;_x000D_
background: #fafafa;_x000D_
}_x000D_
_x000D_
p {_x000D_
font-family: 'Poppins', sans-serif;_x000D_
font-size: 1.1em;_x000D_
font-weight: 300;_x000D_
line-height: 1.7em;_x000D_
color: #999;_x000D_
}_x000D_
_x000D_
a,_x000D_
a:hover,_x000D_
a:focus {_x000D_
color: inherit;_x000D_
text-decoration: none;_x000D_
transition: all 0.3s;_x000D_
}_x000D_
_x000D_
.navbar {_x000D_
padding: 15px 10px;_x000D_
background: #fff;_x000D_
border: none;_x000D_
border-radius: 0;_x000D_
margin-bottom: 40px;_x000D_
box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);_x000D_
}_x000D_
_x000D_
.navbar-btn {_x000D_
box-shadow: none;_x000D_
outline: none !important;_x000D_
border: none;_x000D_
}_x000D_
_x000D_
.line {_x000D_
width: 100%;_x000D_
height: 1px;_x000D_
border-bottom: 1px dashed #ddd;_x000D_
margin: 40px 0;_x000D_
}_x000D_
/* ---------------------------------------------------_x000D_
SIDEBAR STYLE_x000D_
----------------------------------------------------- */_x000D_
_x000D_
#sidebar {_x000D_
width: 250px;_x000D_
position: fixed;_x000D_
top: 0;_x000D_
left: 0;_x000D_
height: 100vh;_x000D_
z-index: 999;_x000D_
background: #7386D5;_x000D_
color: #fff !important;_x000D_
transition: all 0.3s;_x000D_
}_x000D_
_x000D_
#sidebar.active {_x000D_
margin-left: -250px;_x000D_
}_x000D_
_x000D_
#sidebar .sidebar-header {_x000D_
padding: 20px;_x000D_
background: #6d7fcc;_x000D_
}_x000D_
_x000D_
#sidebar ul.components {_x000D_
padding: 20px 0;_x000D_
border-bottom: 1px solid #47748b;_x000D_
}_x000D_
_x000D_
#sidebar ul p {_x000D_
color: #fff;_x000D_
padding: 10px;_x000D_
}_x000D_
_x000D_
#sidebar ul li a {_x000D_
padding: 10px;_x000D_
font-size: 1.1em;_x000D_
display: block;_x000D_
color:white;_x000D_
}_x000D_
_x000D_
#sidebar ul li a:hover {_x000D_
color: #7386D5;_x000D_
background: #fff;_x000D_
}_x000D_
_x000D_
#sidebar ul li.active>a,_x000D_
a[aria-expanded="true"] {_x000D_
color: #fff;_x000D_
background: #6d7fcc;_x000D_
}_x000D_
_x000D_
a[data-toggle="collapse"] {_x000D_
position: relative;_x000D_
}_x000D_
_x000D_
a[aria-expanded="false"]::before,_x000D_
a[aria-expanded="true"]::before {_x000D_
content: '\e259';_x000D_
display: block;_x000D_
position: absolute;_x000D_
right: 20px;_x000D_
font-family: 'Glyphicons Halflings';_x000D_
font-size: 0.6em;_x000D_
}_x000D_
_x000D_
a[aria-expanded="true"]::before {_x000D_
content: '\e260';_x000D_
}_x000D_
_x000D_
ul ul a {_x000D_
font-size: 0.9em !important;_x000D_
padding-left: 30px !important;_x000D_
background: #6d7fcc;_x000D_
}_x000D_
_x000D_
ul.CTAs {_x000D_
padding: 20px;_x000D_
}_x000D_
_x000D_
ul.CTAs a {_x000D_
text-align: center;_x000D_
font-size: 0.9em !important;_x000D_
display: block;_x000D_
border-radius: 5px;_x000D_
margin-bottom: 5px;_x000D_
}_x000D_
_x000D_
a.download {_x000D_
background: #fff;_x000D_
color: #7386D5;_x000D_
}_x000D_
_x000D_
a.article,_x000D_
a.article:hover {_x000D_
background: #6d7fcc !important;_x000D_
color: #fff !important;_x000D_
}_x000D_
/* ---------------------------------------------------_x000D_
CONTENT STYLE_x000D_
----------------------------------------------------- */_x000D_
_x000D_
#content {_x000D_
width: calc(100% - 250px);_x000D_
padding: 40px;_x000D_
min-height: 100vh;_x000D_
transition: all 0.3s;_x000D_
position: absolute;_x000D_
top: 0;_x000D_
right: 0;_x000D_
}_x000D_
_x000D_
#content.active {_x000D_
width: 100%;_x000D_
}_x000D_
/* ---------------------------------------------------_x000D_
MEDIAQUERIES_x000D_
----------------------------------------------------- */_x000D_
_x000D_
@media (max-width: 768px) {_x000D_
#sidebar {_x000D_
margin-left: -250px;_x000D_
}_x000D_
#sidebar.active {_x000D_
margin-left: 0;_x000D_
}_x000D_
#content {_x000D_
width: 100%;_x000D_
}_x000D_
#content.active {_x000D_
width: calc(100% - 250px);_x000D_
}_x000D_
#sidebarCollapse span {_x000D_
display: none;_x000D_
}_x000D_
}
_x000D_
<!DOCTYPE html>_x000D_
<html>_x000D_
_x000D_
<head>_x000D_
<meta charset="utf-8">_x000D_
<meta name="viewport" content="width=device-width, initial-scale=1.0">_x000D_
<meta http-equiv="X-UA-Compatible" content="IE=edge">_x000D_
_x000D_
<title>Collapsible sidebar using Bootstrap 3</title>_x000D_
_x000D_
<!-- Bootstrap CSS CDN -->_x000D_
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">_x000D_
<!-- Our Custom CSS -->_x000D_
<link rel="stylesheet" href="style2.css">_x000D_
<!-- Scrollbar Custom CSS -->_x000D_
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/malihu-custom-scrollbar-plugin/3.1.5/jquery.mCustomScrollbar.min.css">_x000D_
_x000D_
</head>_x000D_
_x000D_
<body>_x000D_
_x000D_
_x000D_
_x000D_
<div class="wrapper">_x000D_
<!-- Sidebar Holder -->_x000D_
<nav id="sidebar">_x000D_
<div class="sidebar-header">_x000D_
<h3>Header as you want </h3>_x000D_
</h3>_x000D_
</div>_x000D_
_x000D_
<ul class="list-unstyled components">_x000D_
<p>Dummy Heading</p>_x000D_
<li class="active">_x000D_
<a href="#menu">Animación</a>_x000D_
_x000D_
</li>_x000D_
<li>_x000D_
<a href="#menu">Ilustración</a>_x000D_
_x000D_
_x000D_
</li>_x000D_
<li>_x000D_
<a href="#menu">Interacción</a>_x000D_
</li>_x000D_
<li>_x000D_
<a href="#">Blog</a>_x000D_
</li>_x000D_
<li>_x000D_
<a href="#">Acerca</a>_x000D_
</li>_x000D_
<li>_x000D_
<a href="#">contacto</a>_x000D_
</li>_x000D_
_x000D_
_x000D_
</ul>_x000D_
_x000D_
_x000D_
</nav>_x000D_
_x000D_
<!-- Page Content Holder -->_x000D_
<div id="content">_x000D_
_x000D_
<nav class="navbar navbar-default">_x000D_
<div class="container-fluid">_x000D_
_x000D_
<div class="navbar-header">_x000D_
<button type="button" id="sidebarCollapse" class="btn btn-info navbar-btn">_x000D_
<i class="glyphicon glyphicon-align-left"></i>_x000D_
<span>Toggle Sidebar</span>_x000D_
</button>_x000D_
</div>_x000D_
_x000D_
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">_x000D_
<ul class="nav navbar-nav navbar-right">_x000D_
<li><a href="#">Page</a></li>_x000D_
</ul>_x000D_
</div>_x000D_
</div>_x000D_
</nav>_x000D_
_x000D_
_x000D_
</div>_x000D_
</div>_x000D_
_x000D_
_x000D_
_x000D_
_x000D_
_x000D_
<!-- jQuery CDN -->_x000D_
<script src="https://code.jquery.com/jquery-1.12.0.min.js"></script>_x000D_
<!-- Bootstrap Js CDN -->_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
<!-- jQuery Custom Scroller CDN -->_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/malihu-custom-scrollbar-plugin/3.1.5/jquery.mCustomScrollbar.concat.min.js"></script>_x000D_
_x000D_
<script type="text/javascript">_x000D_
$(document).ready(function() {_x000D_
_x000D_
_x000D_
$('#sidebarCollapse').on('click', function() {_x000D_
$('#sidebar, #content').toggleClass('active');_x000D_
$('.collapse.in').toggleClass('in');_x000D_
$('a[aria-expanded=true]').attr('aria-expanded', 'false');_x000D_
});_x000D_
});_x000D_
</script>_x000D_
</body>_x000D_
_x000D_
</html>
_x000D_
if this is what you want .
As already said by Jordão, just negate it:
if (!(id in tutorTimes)) { ... }
Note: The above test if tutorTimes has a property with the name specified in id, anywhere in the prototype chain. For example "valueOf" in tutorTimes
returns true because it is defined in Object.prototype.
If you want to test if a property doesn't exist in the current object, use hasOwnProperty:
if (!tutorTimes.hasOwnProperty(id)) { ... }
Or if you might have a key that is hasOwnPropery you can use this:
if (!Object.prototype.hasOwnProperty.call(tutorTimes,id)) { ... }
A short way of doing this would be to use Underscore.js's _.range() method. :)
http://underscorejs.org/#range
// declare in your controller or wrap _.range in a function that returns a dynamic range.
var range = _.range(1, 11);
// val will be each number in the array not the index.
<div ng-repeat='val in range'>
{{ $index }}: {{ val }}
</div>
So Another Reason why You might get this Error is if you use the same model in different files but your require
path has a different case. For example in my situation I had:
require('./models/User')
in one file and then in another file where I needed access to the User model I had require('./models/user')
.
I guess the look up for modules & mongoose is treating it as a different file. Once I made sure the case matched in both it was no longer an issue.
Have a look at the syntax for adding a remote repo.
git remote add origin <url_of_remote repository>
Example:
git remote add origin [email protected]:peter/first_app.git
Let us dissect the command :
git remote this is used to manage your Central servers for hosting your git repositories.
May be you are using Github for your central repository stuff. I will give you a example and explain the git remote add origin command
Suppose I am working with GitHub and BitBucket for the central servers for the git repositories and have created repositories on both the websites for my first-app project.
Now if I want to push my changes to both these git servers then I will need to tell git how to reach these central repositories. So I will have to add these,
For GitHub
git remote add gh_origin https://github.com/user/first-app-git.git
And For BitBucket
git remote add bb_origin https://[email protected]/user/first-app-git.git
I have used two variables ( as far it is easy for me to call them variables ) gh_origin ( gh FOR GITHUB ) and bb_origin ( bb for BITBUCKET ) just to explain you we can call origin anything we want.
Now after making some changes I will have to send(push) all these changes to central repositories so that other users can see these changes. So I call
Pushing to GitHub
git push gh_origin master
Pushing to BitBucket
git push bb_origin master
gh_origin is holding value of https://github.com/user/first-app-git.git and bb_origin is holding value of https://[email protected]/user/first-app-git.git
This two variables are making my life easier
as whenever I need to send my code changes I need to use this words instead of remembering or typing the URL for the same.
Most of the times you wont see anything except than origin as most of the times you will deal with only one central repository like Github or BitBucket for example.
The easiest way to do this is to configure your Firefox to use a PAC with a file URL, and then change the file URL from the line command before you start Firefox.
This is the easiest way. You don't have to write a script that remembers what path to prefs.js is (which might change over time).
You configure your profile once, and then you edit the external file whenever you want.
You need to escape those but don't just replace it by %2F
manually. You can use URLEncoder
for this.
Eg URLEncoder.encode(url, "UTF-8")
Then you can say
yourUrl = "www.musicExplained/index.cfm/artist/" + URLEncoder.encode(VariableName, "UTF-8")
Go to Help -> Install new softwares-> add -> paste this link in location box http://download.eclipse.org/webtools/repository/luna/ install all new versions..
The solutions I've seen are from the perspective of adding javascript features to a theme. However, the OP asked, specifically, "How exactly do I add it for a single WordPress page?" This sounds like it might be how I use javascript in my Wordpress blog, where individual posts may have different javascript-powered "widgets". For instance, a post might let the user change variables (sliders, checkboxes, text input fields), and plots or lists the results.
Starting from the JavaScript perspective:
Don’t even think about including significant JavaScript in your post’s html—create a JavaScript file, or files, with your code.
If your JavaScript widget interacts with html controls and fields, you’ll need to understand how to query and set those elements from JavaScript, and also how to let UI elements call your JavaScript functions. Here are a couple of examples; first, from JavaScript:
var val = document.getElementById(“AM_Freq_A_3”).value;
And from html:
<input type="range" id="AM_Freq_A_3" class="freqSlider" min="0" max="1000" value="0" oninput='sliderChanged_AM_widget(this);'/>
Add this to your .js file, using the name of your function that configures and draws your JavaScript widget when the page is ready for it:
jQuery(document).ready(function( $ ) {
your_init_function();
});
In the Wordpress code editor, I typically specify the scripts at the end of the post. For instance, I have a scripts folder in my main directory. Inside I have a utilities directory with common JavaScript that some of my posts may share—in this case some of my own math utility function and the flotr2 plotting library. I find it more convenient to group the post-specific JavaScript in another directory, with subdirectories based on date instead of using the media manager, for instance.
<script type="text/javascript" src="/scripts/utils/flotr2.min.js"></script>
<script type="text/javascript" src="/scripts/utils/math.min.js"></script>
<script type="text/javascript" src="/scripts/widgets/20161207/FreqRes.js"></script>
Wordpress registers jQuery, but it isn’t available unless you tell Wordpress you need it, by enqueuing it. If you don’t, the jQuery command will fail. Many sources tell you how to add this command to your functions.php, but assume you know some other important details.
First, it’s a bad idea to edit a theme—any future update of the theme will wipe out your changes. Make a child theme. Here’s how:
https://developer.wordpress.org/themes/advanced-topics/child-themes/
The child’s functions.php file does not override the parent theme’s file of the same name, it adds to it. The child-themes tutorial suggest how to enqueue the parent and child style.css file. We can simply add another line to that function to also enqueue jQuery. Here's my entire functions.php file for the child theme:
<?php
add_action( 'wp_enqueue_scripts', 'earlevel_scripts_enqueue' );
function earlevel_scripts_enqueue() {
// styles
$parent_style = 'parent-style';
wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
wp_enqueue_style( 'child-style',
get_stylesheet_directory_uri() . '/style.css',
array( $parent_style ),
wp_get_theme()->get('Version')
);
// posts with js widgets need jquery
wp_enqueue_script('jquery');
}
Assuming their updates are on master, and you are on the branch you want to merge the changes into.
git remote add origin https://github.com/<github-username>/<repo-name>.git
git pull origin master
Also note that you will then want to push the merge back to your copy of the repository:
git push origin master
DispatcherServlet
is Spring MVC's implementation of the front controller pattern.
See description in the Spring docs here.
Essentially, it's a servlet that takes the incoming request, and delegates processing of that request to one of a number of handlers, the mapping of which is specific in the DispatcherServlet
configuration.
response_json = ("{ \"response_json\":" + str(list_of_dict)+ "}").replace("\'","\"")
response_json = json.dumps(response_json)
response_json = json.loads(response_json)
The top answer is flawed in my opinion. Hopefully, no one is mass importing all of pandas into their namespace with from pandas import *
. Also, the map
method should be reserved for those times when passing it a dictionary or Series. It can take a function but this is what apply
is used for.
So, if you must use the above approach, I would write it like this
df["A1"], df["A2"] = zip(*df["a"].apply(calculate))
There's actually no reason to use zip here. You can simply do this:
df["A1"], df["A2"] = calculate(df['a'])
This second method is also much faster on larger DataFrames
df = pd.DataFrame({'a': [1,2,3] * 100000, 'b': [2,3,4] * 100000})
DataFrame created with 300,000 rows
%timeit df["A1"], df["A2"] = calculate(df['a'])
2.65 ms ± 92.4 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
%timeit df["A1"], df["A2"] = zip(*df["a"].apply(calculate))
159 ms ± 5.24 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
60x faster than zip
Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above
%%timeit
A1, A2 = [], []
for val in df['a']:
A1.append(val**2)
A2.append(val**3)
df['A1'] = A1
df['A2'] = A2
298 ms ± 7.14 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
So this is twice as slow which isn't a terrible performance regression, but if we cythonize the above, we get much better performance. Assuming, you are using ipython:
%load_ext cython
%%cython
cpdef power(vals):
A1, A2 = [], []
cdef double val
for val in vals:
A1.append(val**2)
A2.append(val**3)
return A1, A2
%timeit df['A1'], df['A2'] = power(df['a'])
72.7 ms ± 2.16 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
You can get even greater speed improvements if you use the direct vectorized operations.
%timeit df['A1'], df['A2'] = df['a'] ** 2, df['a'] ** 3
5.13 ms ± 320 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
This takes advantage of NumPy's extremely fast vectorized operations instead of our loops. We now have a 30x speedup over the original.
apply
The above example should clearly show how slow apply
can be, but just so its extra clear let's look at the most basic example. Let's square a Series of 10 million numbers with and without apply
s = pd.Series(np.random.rand(10000000))
%timeit s.apply(calc)
3.3 s ± 57.4 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)
Without apply is 50x faster
%timeit s ** 2
66 ms ± 2 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)
This is exactly what ajax is for. See here:
Basically, you ajax/test.php and put the returned HTML code to the element which has the result id.
$('#result').load('ajax/test.php');
Of course, you will need to put the functionality which takes time to a new php file (or call the old one with a GET parameter which will activate that functionality only).
Suppose your query is "select id,name from users where rollNo = 1001".
Here query will return a object with id and name column. Your Response class is like bellow:
public class UserObject{
int id;
String name;
String rollNo;
public UserObject(Object[] columns) {
this.id = (columns[0] != null)?((BigDecimal)columns[0]).intValue():0;
this.name = (String) columns[1];
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRollNo() {
return rollNo;
}
public void setRollNo(String rollNo) {
this.rollNo = rollNo;
}
}
here UserObject
constructor will get a Object Array and set data with object.
public UserObject(Object[] columns) {
this.id = (columns[0] != null)?((BigDecimal)columns[0]).intValue():0;
this.name = (String) columns[1];
}
Your query executing function is like bellow :
public UserObject getUserByRoll(EntityManager entityManager,String rollNo) {
String queryStr = "select id,name from users where rollNo = ?1";
try {
Query query = entityManager.createNativeQuery(queryStr);
query.setParameter(1, rollNo);
return new UserObject((Object[]) query.getSingleResult());
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
Here you have to import bellow packages:
import javax.persistence.Query;
import javax.persistence.EntityManager;
Now your main class, you have to call this function.
First you have to get EntityManager and call this getUserByRoll(EntityManager entityManager,String rollNo)
function. Calling procedure is given bellow:
@PersistenceContext
private EntityManager entityManager;
UserObject userObject = getUserByRoll(entityManager,"1001");
Now you have data in this userObject.
Here is Imports
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
Note:
query.getSingleResult() return a array. You have to maintain the column position and data type.
select id,name from users where rollNo = ?1
query return a array and it's [0] --> id and [1] -> name
.
For more info, visit this Answer
Thanks :)
this
does not affect resulting code - it is compilation time operator and the code generated with or without it will be the same. When you have to use it, depends on context. For example you have to use it, as you said, when you have local variable that shadows class variable and you want refer to class variable and not local one.
edit: by "resulting code will be the same" I mean of course, when some variable in local scope doesn't hide the one belonging to class. Thus
class POJO {
protected int i;
public void modify() {
i = 9;
}
public void thisModify() {
this.i = 9;
}
}
resulting code of both methods will be the same. The difference will be if some method declares local variable with the same name
public void m() {
int i;
i = 9; // i refers to variable in method's scope
this.i = 9; // i refers to class variable
}
using System.Windows.Forms;
public class message
{
static void Main()
{
MessageBox.Show("Hello World!");
}
}
gcc and g ++ are both GNU compiler. They both compile c and c++. The difference is for *.c files gcc treats it as a c program, and g++ sees it as a c ++ program. *.cpp files are considered to be c ++ programs. c++ is a super set of c and the syntax is more strict, so be careful about the suffix.
According to the docs savefig
accepts a file path, so all you need is to specify a full (or relative) path instead of a file name.
Download Spring STS (SpringSource Tool Suite) and choose Spring Template Project from the Dashboard. This is the easiest way to get a preconfigured spring mvc project, ready to go.
Think about it as array of array.
If you do this str[x][y], then there is array of length x where each element in turn contains array of length y. In java its not necessary for second dimension to have same length. So for x=i you can have y=m and x=j you can have y=n
For this your declaration looks like
String[][] test = new String[4][]; test[0] = new String[3]; test[1] = new String[2];
etc..
Use:
#import <QuartzCore/QuartzCore.h>
.......
[myView.layer removeAllAnimations];
Short answer: No practical, performance, or storage, difference.
Long answer:
There is essentially no difference (in MySQL) between VARCHAR(3000)
(or any other large limit) and TEXT
. The former will truncate at 3000 characters; the latter will truncate at 65535 bytes. (I make a distinction between bytes and characters because a character can take multiple bytes.)
For smaller limits in VARCHAR
, there are some advantages over TEXT
.
CHARACTER SET
.INDEXes
are limited in how big a column can be indexed. (767 or 3072 bytes; this is version and settings dependent)SELECTs
are handled in two different ways -- MEMORY (faster) or MyISAM (slower). When 'large' columns are involved, the slower technique is automatically picked. (Significant changes coming in version 8.0; so this bullet item is subject to change.)TEXT
datatypes (as opposed to VARCHAR
) jump straight to MyISAM. That is, TINYTEXT
is automatically worse for generated temp tables than the equivalent VARCHAR
. (But this takes the discussion in a third direction!)VARBINARY
is like VARCHAR
; BLOB
is like TEXT
.Rebuttal to other answers
The original question asked one thing (which datatype to use); the accepted answer answered something else (off-record storage). That answer is now out of date.
When this thread was started and answered, there were only two "row formats" in InnoDB. Soon afterwards, two more formats (DYNAMIC
and COMPRESSED
) were introduced.
The storage location for TEXT
and VARCHAR()
is based on size, not on name of datatype. For an updated discussion of on/off-record storage of large text/blob columns, see this .
Ok, I don't normally answer my own questions but after a bit of tinkering, I have figured out definitively how Oracle stores the result of a DATE subtraction.
When you subtract 2 dates, the value is not a NUMBER datatype (as the Oracle 11.2 SQL Reference manual would have you believe). The internal datatype number of a DATE subtraction is 14, which is a non-documented internal datatype (NUMBER is internal datatype number 2). However, it is actually stored as 2 separate two's complement signed numbers, with the first 4 bytes used to represent the number of days and the last 4 bytes used to represent the number of seconds.
An example of a DATE subtraction resulting in a positive integer difference:
select date '2009-08-07' - date '2008-08-08' from dual;
Results in:
DATE'2009-08-07'-DATE'2008-08-08'
---------------------------------
364
select dump(date '2009-08-07' - date '2008-08-08') from dual;
DUMP(DATE'2009-08-07'-DATE'2008
-------------------------------
Typ=14 Len=8: 108,1,0,0,0,0,0,0
Recall that the result is represented as a 2 seperate two's complement signed 4 byte numbers. Since there are no decimals in this case (364 days and 0 hours exactly), the last 4 bytes are all 0s and can be ignored. For the first 4 bytes, because my CPU has a little-endian architecture, the bytes are reversed and should be read as 1,108 or 0x16c, which is decimal 364.
An example of a DATE subtraction resulting in a negative integer difference:
select date '1000-08-07' - date '2008-08-08' from dual;
Results in:
DATE'1000-08-07'-DATE'2008-08-08'
---------------------------------
-368160
select dump(date '1000-08-07' - date '2008-08-08') from dual;
DUMP(DATE'1000-08-07'-DATE'2008-08-0
------------------------------------
Typ=14 Len=8: 224,97,250,255,0,0,0,0
Again, since I am using a little-endian machine, the bytes are reversed and should be read as 255,250,97,224 which corresponds to 11111111 11111010 01100001 11011111. Now since this is in two's complement signed binary numeral encoding, we know that the number is negative because the leftmost binary digit is a 1. To convert this into a decimal number we would have to reverse the 2's complement (subtract 1 then do the one's complement) resulting in: 00000000 00000101 10011110 00100000 which equals -368160 as suspected.
An example of a DATE subtraction resulting in a decimal difference:
select to_date('08/AUG/2004 14:00:00', 'DD/MON/YYYY HH24:MI:SS'
- to_date('08/AUG/2004 8:00:00', 'DD/MON/YYYY HH24:MI:SS') from dual;
TO_DATE('08/AUG/200414:00:00','DD/MON/YYYYHH24:MI:SS')-TO_DATE('08/AUG/20048:00:
--------------------------------------------------------------------------------
.25
The difference between those 2 dates is 0.25 days or 6 hours.
select dump(to_date('08/AUG/2004 14:00:00', 'DD/MON/YYYY HH24:MI:SS')
- to_date('08/AUG/2004 8:00:00', 'DD/MON/YYYY HH24:MI:SS')) from dual;
DUMP(TO_DATE('08/AUG/200414:00:
-------------------------------
Typ=14 Len=8: 0,0,0,0,96,84,0,0
Now this time, since the difference is 0 days and 6 hours, it is expected that the first 4 bytes are 0. For the last 4 bytes, we can reverse them (because CPU is little-endian) and get 84,96 = 01010100 01100000 base 2 = 21600 in decimal. Converting 21600 seconds to hours gives you 6 hours which is the difference which we expected.
Hope this helps anyone who was wondering how a DATE subtraction is actually stored.
You get the syntax error because the date math does not return a NUMBER, but it returns an INTERVAL:
SQL> SELECT DUMP(SYSDATE - start_date) from test;
DUMP(SYSDATE-START_DATE)
--------------------------------------
Typ=14 Len=8: 188,10,0,0,223,65,1,0
You need to convert the number in your example into an INTERVAL first using the NUMTODSINTERVAL Function
For example:
SQL> SELECT (SYSDATE - start_date) DAY(5) TO SECOND from test;
(SYSDATE-START_DATE)DAY(5)TOSECOND
----------------------------------
+02748 22:50:04.000000
SQL> SELECT (SYSDATE - start_date) from test;
(SYSDATE-START_DATE)
--------------------
2748.9515
SQL> select NUMTODSINTERVAL(2748.9515, 'day') from dual;
NUMTODSINTERVAL(2748.9515,'DAY')
--------------------------------
+000002748 22:50:09.600000000
SQL>
Based on the reverse cast with the NUMTODSINTERVAL() function, it appears some rounding is lost in translation.
i am using this function to truncate value after decimal in a string variable
public static string TruncateFunction(string value)
{
if (string.IsNullOrEmpty(value)) return "";
else
{
string[] split = value.Split('.');
if (split.Length > 0)
{
string predecimal = split[0];
string postdecimal = split[1];
postdecimal = postdecimal.Length > 6 ? postdecimal.Substring(0, 6) : postdecimal;
return predecimal + "." + postdecimal;
}
else return value;
}
}
Most browsers can decompress gzip on the fly. That might be a better option than a javascript implementation.
input.next();
String s = input.toString();
change it to
String s = input.next();
May be that's what you were trying to do.
A Bin file is a pure binary file with no memory fix-ups or relocations, more than likely it has explicit instructions to be loaded at a specific memory address. Whereas....
ELF files are Executable Linkable Format which consists of a symbol look-ups and relocatable table, that is, it can be loaded at any memory address by the kernel and automatically, all symbols used, are adjusted to the offset from that memory address where it was loaded into. Usually ELF files have a number of sections, such as 'data', 'text', 'bss', to name but a few...it is within those sections where the run-time can calculate where to adjust the symbol's memory references dynamically at run-time.
If you want "physical" access, we're developing this API that will eventually allows you to communicate with storage devices. It's open source and you can see the current code for some information. Check back for more features: https://github.com/virtium/vtStor
Use GregorianCalendar
. Set the date of the object, and then use getActualMaximum(Calendar.DAY_IN_MONTH)
.
http://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.html#getActualMaximum%28int%29 (but it was the same in Java 1.4)
Try this
Console.WriteLine("{0,10}{1,10}{2,10}{3,10}{4,10}",
customer[DisplayPos],
sales_figures[DisplayPos],
fee_payable[DisplayPos],
seventy_percent_value,
thirty_percent_value);
where the first number inside the curly brackets is the index and the second is the alignment. The sign of the second number indicates if the string should be left or right aligned. Use negative numbers for left alignment.
Or look at http://msdn.microsoft.com/en-us/library/aa331875(v=vs.71).aspx
Just define:
#define M_PI acos(-1.0)
It should give you exact PI number that math functions are working with. So if they change PI value they are working with in tangent or cosine or sine, then your program should be always up-to-dated ;)
add plt.figure(figsize=(16,5))
before the sns.heatmap and play around with the figsize numbers till you get the desired size
...
plt.figure(figsize = (16,5))
ax = sns.heatmap(df1.iloc[:, 1:6:], annot=True, linewidths=.5)
This works in Python 2 and Python 3:
A random key:
random.choice(list(d.keys()))
A random value
random.choice(list(d.values()))
A random key and value
random.choice(list(d.items()))
My machine is Windows 10, I've faced similar problems while tried to compile SASS using node-sass
package. My node version is v10.16.3 and npm version is 6.9.0
The way that I resolved the problem:
package-lock.json
file and node_modules/
folder.npm i -g node-sass
.npm install
npm run build:css
And it works!!
(date('d') > 28) ? date("mdY", strtotime("last day of next month")) : date("mdY", strtotime("+1 month"));
This will compensate for February and the other 31 day months. You could of course do a lot more checking to to get more exact for 'this day next month' relative date formats (which does not work sadly, see below), and you could just as well use DateTime.
Both DateInterval('P1M')
and strtotime("+1 month")
are essentially blindly adding 31 days regardless of the number of days in the following month.
If you are trying to return back the ID within the scope, using the SCOPE_IDENTITY()
would be a better approach. I would not advice to use @@IDENTITY
, as this can return any ID.
CREATE PROC [dbo].[sp_Test] (
@myID int output,
@myFirstName nvarchar(50),
@myLastName nvarchar(50),
@myAddress nvarchar(50),
@myPort int
) AS
BEGIN
INSERT INTO Dvds (myFirstName, myLastName, myAddress, myPort)
VALUES (@myFirstName, @myLastName, @myAddress, @myPort);
SET @myID = SCOPE_IDENTITY();
END
GO
async/await
version using util.promisify
as of Node 8:
const fs = require('fs');
const { promisify } = require('util');
const stat = promisify(fs.stat);
describe('async stat', () => {
it('should not throw if file does exist', async () => {
try {
const stats = await stat(path.join('path', 'to', 'existingfile.txt'));
assert.notEqual(stats, null);
} catch (err) {
// shouldn't happen
}
});
});
describe('async stat', () => {
it('should throw if file does not exist', async () => {
try {
const stats = await stat(path.join('path', 'to', 'not', 'existingfile.txt'));
} catch (err) {
assert.notEqual(err, null);
}
});
});
Try to relay an array into newArray when looping:
var auctions = Auction.auctions;
var auctionIndex;
var auction;
var newAuctions = [];
for (
auctionIndex = 0;
auctionIndex < Auction.auctions.length;
auctionIndex++) {
auction = auctions[auctionIndex];
if (auction.seconds >= 0) {
newAuctions.push(
auction);
}
}
Auction.auctions = newAuctions;
Concise and memory efficient:
#!/usr/bin/env python
# file: grep.py
import re, sys
map(sys.stdout.write,(l for l in sys.stdin if re.search(sys.argv[1],l)))
It works like egrep (without too much error handling), e.g.:
cat input-file | grep.py "RE"
And here is the one-liner:
cat input-file | python -c "import re,sys;map(sys.stdout.write,(l for l in sys.stdin if re.search(sys.argv[1],l)))" "RE"