If you are working with Source safe then make a new directory and take the latest there, this solved my issue...thanks
Here is the code for you`r class . but this also contains lot of refactoring. Please add a for each rather than for. cheers :)
static int isLeft(ArrayList<String> left, ArrayList<String> right)
{
int f = 0;
for (int i = 0; i < left.size(); i++) {
for (int j = 0; j < right.size(); j++)
{
if (left.get(i).charAt(0) == right.get(j).charAt(0)) {
System.out.println("Grammar is left recursive");
f = 1;
}
}
}
return f;
}
public static void main(String[] args) {
// TODO code application logic here
ArrayList<String> left = new ArrayList<String>();
ArrayList<String> right = new ArrayList<String>();
Scanner sc = new Scanner(System.in);
System.out.println("enter no of prod");
int n = sc.nextInt();
for (int i = 0; i < n; i++) {
System.out.println("enter left prod");
String leftText = sc.next();
left.add(leftText);
System.out.println("enter right prod");
String rightText = sc.next();
right.add(rightText);
}
System.out.println("the productions are");
for (int i = 0; i < n; i++) {
System.out.println(left.get(i) + "->" + right.get(i));
}
int flag;
flag = isLeft(left, right);
if (flag == 1) {
System.out.println("Removing left recursion");
} else {
System.out.println("No left recursion");
}
}
In html:
<input (keypress)="onlyNumber(event)"/>
In Component:
onlyNumber(evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode > 31 && (charCode < 48 || charCode > 57)) {
return false;
}
return true;
}
Referenced file contains errors (http://www.springframework.org/schema/context/spring-context-3.0.xsd)
i faced this problem, when i was configuring dispatcher-servlet.xml ,you can remove this:
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd"
from your xml and you can also follow the steps go to window -> preferences -> validation -> and unchecked XML validator and XML schema validator.
You need to use an explicit color value (e.g. #000
or blue
) for the color
-property. none
is invalid here. The initial value is browser-specific and cannot be restored using CSS. Keep in mind that there are some other pseudo-classes than :active
, too.
An alternative could be to use the new JSON extension for SQLite. I've only just come across this myself: https://www.sqlite.org/json1.html This would allow you to perform a certain level of querying the stored JSON. If you used VARCHAR or TEXT to store a JSON string you would have no ability to query it. This is a great article showing its usage (in python) http://charlesleifer.com/blog/using-the-sqlite-json1-and-fts5-extensions-with-python/
Today, I was also struggling to merge JSON objects and came with following solution (uses Gson library).
private JsonObject mergeJsons(List<JsonObject> jsonObjs) {
JsonObject mergedJson = new JsonObject();
jsonObjs.forEach((JsonObject jsonObj) -> {
Set<Map.Entry<String, JsonElement>> entrySet = jsonObj.entrySet();
entrySet.forEach((next) -> {
mergedJson.add(next.getKey(), next.getValue());
});
});
return mergedJson;
}
For Windows host, I want to highly recommend this tutorial::
Nothing more, nothing less!
Prebuilt GNU Toolchains available for Raspberry, Beaglebone, Cubieboard, AVR (Atmel) and more
Use a for
loop instead of .forEach()
var myObj = [{"a": "1","b": null},{"a": "2","b": 5}]
var result = false
for(var call of myObj) {
console.log(call)
var a = call['a'], b = call['b']
if(a == null || b == null) {
result = false
break
}
}
This one works in iOS and Safari.
You need to use Stoive's ArrayBuffer solution but you can't use BlobBuilder, as vava720 indicates, so here's the mashup of both.
function dataURItoBlob(dataURI) {
var byteString = atob(dataURI.split(',')[1]);
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ab], { type: 'image/jpeg' });
}
On centos and fedora work with fsadm
fsadm resize /dev/vg_name/root
You can create a pre-filled form URL from within the Form Editor, as described in the documentation for Drive Forms. You'll end up with a URL like this, for example:
https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=Mike+Jones&entry.787184751=1975-05-09&entry.1381372492&entry.960923899
In this example, question 1, "Name", has an ID of 726721210
, while question 2, "Birthday" is 787184751
. Questions 3 and 4 are blank.
You could generate the pre-filled URL by adapting the one provided through the UI to be a template, like this:
function buildUrls() {
var template = "https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=##Name##&entry.787184751=##Birthday##&entry.1381372492&entry.960923899";
var ss = SpreadsheetApp.getActive().getSheetByName("Sheet1"); // Email, Name, Birthday
var data = ss.getDataRange().getValues();
// Skip headers, then build URLs for each row in Sheet1.
for (var i = 1; i < data.length; i++ ) {
var url = template.replace('##Name##',escape(data[i][1]))
.replace('##Birthday##',data[i][2].yyyymmdd()); // see yyyymmdd below
Logger.log(url); // You could do something more useful here.
}
};
This is effective enough - you could email the pre-filled URL to each person, and they'd have some questions already filled in.
Instead of creating our template using brute force, we can piece it together programmatically. This will have the advantage that we can re-use the code without needing to remember to change the template.
Each question in a form is an item. For this example, let's assume the form has only 4 questions, as you've described them. Item [0]
is "Name", [1]
is "Birthday", and so on.
We can create a form response, which we won't submit - instead, we'll partially complete the form, only to get the pre-filled form URL. Since the Forms API understands the data types of each item, we can avoid manipulating the string format of dates and other types, which simplifies our code somewhat.
(EDIT: There's a more general version of this in How to prefill Google form checkboxes?)
/**
* Use Form API to generate pre-filled form URLs
*/
function betterBuildUrls() {
var ss = SpreadsheetApp.getActive();
var sheet = ss.getSheetByName("Sheet1");
var data = ss.getDataRange().getValues(); // Data for pre-fill
var formUrl = ss.getFormUrl(); // Use form attached to sheet
var form = FormApp.openByUrl(formUrl);
var items = form.getItems();
// Skip headers, then build URLs for each row in Sheet1.
for (var i = 1; i < data.length; i++ ) {
// Create a form response object, and prefill it
var formResponse = form.createResponse();
// Prefill Name
var formItem = items[0].asTextItem();
var response = formItem.createResponse(data[i][1]);
formResponse.withItemResponse(response);
// Prefill Birthday
formItem = items[1].asDateItem();
response = formItem.createResponse(data[i][2]);
formResponse.withItemResponse(response);
// Get prefilled form URL
var url = formResponse.toPrefilledUrl();
Logger.log(url); // You could do something more useful here.
}
};
Any date item in the pre-filled form URL is expected to be in this format: yyyy-mm-dd
. This helper function extends the Date object with a new method to handle the conversion.
When reading dates from a spreadsheet, you'll end up with a javascript Date object, as long as the format of the data is recognizable as a date. (Your example is not recognizable, so instead of May 9th 1975
you could use 5/9/1975
.)
// From http://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/
Date.prototype.yyyymmdd = function() {
var yyyy = this.getFullYear().toString();
var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based
var dd = this.getDate().toString();
return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};
No need to changes anything on DB level, just you have to changes in SQL Query it will work.
Example -
"SELECT * FROM <TABLE> where userId = '" + iv_userId + "' AND password = BINARY '" + iv_password + "'";
Binary keyword will make case sensitive.
There are multiple aspects to argument overloading in Javascript:
Variable arguments - You can pass different sets of arguments (in both type and quantity) and the function will behave in a way that matches the arguments passed to it.
Default arguments - You can define a default value for an argument if it is not passed.
Named arguments - Argument order becomes irrelevant and you just name which arguments you want to pass to the function.
Below is a section on each of these categories of argument handling.
Because javascript has no type checking on arguments or required qty of arguments, you can just have one implementation of myFunc()
that can adapt to what arguments were passed to it by checking the type, presence or quantity of arguments.
jQuery does this all the time. You can make some of the arguments optional or you can branch in your function depending upon what arguments are passed to it.
In implementing these types of overloads, you have several different techniques you can use:
undefined
.arguments.length
.arguments
pseudo-array to access any given argument with arguments[i]
.Here are some examples:
Let's look at jQuery's obj.data()
method. It supports four different forms of usage:
obj.data("key");
obj.data("key", value);
obj.data();
obj.data(object);
Each one triggers a different behavior and, without using this dynamic form of overloading, would require four separate functions.
Here's how one can discern between all these options in English and then I'll combine them all in code:
// get the data element associated with a particular key value
obj.data("key");
If the first argument passed to .data()
is a string and the second argument is undefined
, then the caller must be using this form.
// set the value associated with a particular key
obj.data("key", value);
If the second argument is not undefined, then set the value of a particular key.
// get all keys/values
obj.data();
If no arguments are passed, then return all keys/values in a returned object.
// set all keys/values from the passed in object
obj.data(object);
If the type of the first argument is a plain object, then set all keys/values from that object.
Here's how you could combine all of those in one set of javascript logic:
// method declaration for .data()
data: function(key, value) {
if (arguments.length === 0) {
// .data()
// no args passed, return all keys/values in an object
} else if (typeof key === "string") {
// first arg is a string, look at type of second arg
if (typeof value !== "undefined") {
// .data("key", value)
// set the value for a particular key
} else {
// .data("key")
// retrieve a value for a key
}
} else if (typeof key === "object") {
// .data(object)
// set all key/value pairs from this object
} else {
// unsupported arguments passed
}
},
The key to this technique is to make sure that all forms of arguments you want to accept are uniquely identifiable and there is never any confusion about which form the caller is using. This generally requires ordering the arguments appropriately and making sure that there is enough uniqueness in the type and position of the arguments that you can always tell which form is being used.
For example, if you have a function that takes three string arguments:
obj.query("firstArg", "secondArg", "thirdArg");
You can easily make the third argument optional and you can easily detect that condition, but you cannot make only the second argument optional because you can't tell which of these the caller means to be passing because there is no way to identify if the second argument is meant to be the second argument or the second argument was omitted so what's in the second argument's spot is actually the third argument:
obj.query("firstArg", "secondArg");
obj.query("firstArg", "thirdArg");
Since all three arguments are the same type, you can't tell the difference between different arguments so you don't know what the caller intended. With this calling style, only the third argument can be optional. If you wanted to omit the second argument, it would have to be passed as null
(or some other detectable value) instead and your code would detect that:
obj.query("firstArg", null, "thirdArg");
Here's a jQuery example of optional arguments. both arguments are optional and take on default values if not passed:
clone: function( dataAndEvents, deepDataAndEvents ) {
dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
return this.map( function () {
return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
});
},
Here's a jQuery example where the argument can be missing or any one of three different types which gives you four different overloads:
html: function( value ) {
if ( value === undefined ) {
return this[0] && this[0].nodeType === 1 ?
this[0].innerHTML.replace(rinlinejQuery, "") :
null;
// See if we can take a shortcut and just use innerHTML
} else if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
(jQuery.support.leadingWhitespace || !rleadingWhitespace.test( value )) &&
!wrapMap[ (rtagName.exec( value ) || ["", ""])[1].toLowerCase() ] ) {
value = value.replace(rxhtmlTag, "<$1></$2>");
try {
for ( var i = 0, l = this.length; i < l; i++ ) {
// Remove element nodes and prevent memory leaks
if ( this[i].nodeType === 1 ) {
jQuery.cleanData( this[i].getElementsByTagName("*") );
this[i].innerHTML = value;
}
}
// If using innerHTML throws an exception, use the fallback method
} catch(e) {
this.empty().append( value );
}
} else if ( jQuery.isFunction( value ) ) {
this.each(function(i){
var self = jQuery( this );
self.html( value.call(this, i, self.html()) );
});
} else {
this.empty().append( value );
}
return this;
},
Other languages (like Python) allow one to pass named arguments as a means of passing only some arguments and making the arguments independent of the order they are passed in. Javascript does not directly support the feature of named arguments. A design pattern that is commonly used in its place is to pass a map of properties/values. This can be done by passing an object with properties and values or in ES6 and above, you could actually pass a Map object itself.
Here's a simple ES5 example:
jQuery's $.ajax()
accepts a form of usage where you just pass it a single parameter which is a regular Javascript object with properties and values. Which properties you pass it determine which arguments/options are being passed to the ajax call. Some may be required, many are optional. Since they are properties on an object, there is no specific order. In fact, there are more than 30 different properties that can be passed on that object, only one (the url) is required.
Here's an example:
$.ajax({url: "http://www.example.com/somepath", data: myArgs, dataType: "json"}).then(function(result) {
// process result here
});
Inside of the $.ajax()
implementation, it can then just interrogate which properties were passed on the incoming object and use those as named arguments. This can be done either with for (prop in obj)
or by getting all the properties into an array with Object.keys(obj)
and then iterating that array.
This technique is used very commonly in Javascript when there are large numbers of arguments and/or many arguments are optional. Note: this puts an onus on the implementating function to make sure that a minimal valid set of arguments is present and to give the caller some debug feedback what is missing if insufficient arguments are passed (probably by throwing an exception with a helpful error message).
In an ES6 environment, it is possible to use destructuring to create default properties/values for the above passed object. This is discussed in more detail in this reference article.
Here's one example from that article:
function selectEntries({ start=0, end=-1, step=1 } = {}) {
···
};
This creates default properties and values for the start
, end
and step
properties on an object passed to the selectEntries()
function.
In ES6, Javascript adds built-in language support for default values for arguments.
For example:
function multiply(a, b = 1) {
return a*b;
}
multiply(5); // 5
Further description of the ways this can be used here on MDN.
Using the ternary :?
operator [spec].
var hasName = (name === 'true') ? 'Y' :'N';
The ternary operator lets us write shorthand if..else
statements exactly like you want.
It looks like:
(name === 'true')
- our condition
?
- the ternary operator itself
'Y'
- the result if the condition evaluates to true
'N'
- the result if the condition evaluates to false
So in short (question)?(result if true):(result is false)
, as you can see - it returns the value of the expression so we can simply assign it to a variable just like in the example above.
cd C:\Windows\Microsoft.NET\Framework\v4.0.30319\
to go to folderinstallutil C:\ProjectFolder\bin\Debug\MyProject.exe
Note: To uninstall: installutil /u C:\ProjectFolder\bin\Debug\MyProject.exe
There are two main ways that you can do this. One of them is the standard CakePHP way, and the other is using a custom join.
It's worth pointing out that this advice is for CakePHP 2.x, not 3.x.
You would create a relationship with your User model and Messages Model, and use the containable behavior:
class User extends AppModel {
public $actsAs = array('Containable');
public $hasMany = array('Message');
}
class Message extends AppModel {
public $actsAs = array('Containable');
public $belongsTo = array('User');
}
You need to change the messages.from
column to be messages.user_id
so that cake can automagically associate the records for you.
Then you can do this from the messages controller:
$this->Message->find('all', array(
'contain' => array('User')
'conditions' => array(
'Message.to' => 4
),
'order' => 'Message.datetime DESC'
));
I recommend using the first method, because it will save you a lot of time and work. The first method also does the groundwork of setting up a relationship which can be used for any number of other find calls and conditions besides the one you need now. However, cakePHP does support a syntax for defining your own joins. It would be done like this, from the MessagesController
:
$this->Message->find('all', array(
'joins' => array(
array(
'table' => 'users',
'alias' => 'UserJoin',
'type' => 'INNER',
'conditions' => array(
'UserJoin.id = Message.from'
)
)
),
'conditions' => array(
'Message.to' => 4
),
'fields' => array('UserJoin.*', 'Message.*'),
'order' => 'Message.datetime DESC'
));
Note, I've left the field name messages.from
the same as your current table in this example.
Here is how you can do the first example using two relationships to the same model:
class User extends AppModel {
public $actsAs = array('Containable');
public $hasMany = array(
'MessagesSent' => array(
'className' => 'Message',
'foreignKey' => 'from'
)
);
public $belongsTo = array(
'MessagesReceived' => array(
'className' => 'Message',
'foreignKey' => 'to'
)
);
}
class Message extends AppModel {
public $actsAs = array('Containable');
public $belongsTo = array(
'UserFrom' => array(
'className' => 'User',
'foreignKey' => 'from'
)
);
public $hasMany = array(
'UserTo' => array(
'className' => 'User',
'foreignKey' => 'to'
)
);
}
Now you can do your find call like this:
$this->Message->find('all', array(
'contain' => array('UserFrom')
'conditions' => array(
'Message.to' => 4
),
'order' => 'Message.datetime DESC'
));
In Django 1.10 (possibly earlier as well) you can do it as follows.
Model:
class Todo(models.Model):
todo_name = models.CharField(max_length=200)
todo_description = models.CharField(max_length=200, default="")
todo_created = models.DateTimeField('date created')
todo_completed = models.BooleanField(default=False)
def __str__(self):
return self.todo_name
Form:
class TodoUpdateForm(forms.ModelForm):
class Meta:
model = Todo
exclude = ('todo_created','todo_completed')
Template:
<form action="" method="post">{% csrf_token %}
{{ form.non_field_errors }}
<div class="fieldWrapper">
{{ form.todo_name.errors }}
<label for="{{ form.name.id_for_label }}">Name:</label>
{{ form.todo_name }}
</div>
<div class="fieldWrapper">
{{ form.todo_description.errors }}
<label for="{{ form.todo_description.id_for_label }}">Description</label>
{{ form.todo_description }}
</div>
<input type="submit" value="Update" />
</form>
Thread th = new Thread(function1);
th.Start();
th.Abort();
void function1(){
//code here
}
Chrome now has the ability to send messages from the website to the extension.
So in the extension background.js (content.js will not work) add something like:
chrome.runtime.onMessageExternal.addListener(
function(request, sender, sendResponse) {
if (request) {
if (request.message) {
if (request.message == "version") {
sendResponse({version: 1.0});
}
}
}
return true;
});
This will then let you make a call from the website:
var hasExtension = false;
chrome.runtime.sendMessage(extensionId, { message: "version" },
function (reply) {
if (reply) {
if (reply.version) {
if (reply.version >= requiredVersion) {
hasExtension = true;
}
}
}
else {
hasExtension = false;
}
});
You can then check the hasExtension variable. The only drawback is the call is asynchronous, so you have to work around that somehow.
Edit: As mentioned below, you'll need to add an entry to the manifest.json listing the domains that can message your addon. Eg:
"externally_connectable": {
"matches": ["*://localhost/*", "*://your.domain.com/*"]
},
For an updated answer see this SO question:
calling web service using VBA code in excel 2010
Both threads should be merged though.
$ git remote add foo git://github.com/foo/bar.git
$ git fetch foo
foo
)$ git log foo/master
$ git cherry-pick 97fedac
I had the same problem and I just saw I had accidentally set:
@Override
public boolean isEnabled(int position)
{
return false;
}
on my CustomListViewAdapter class.
By changing this to:
return true;
I've managed to fix the problem. Just in case if someone has done the same mistake...
Using an in
can have a performance impact. Joining two subqueries will not have the same performance impact and can be accomplished like this:
SELECT *
FROM (SELECT msisdn
,callid
,Change_color
,play_file_name
,date_played
FROM insert_log
WHERE play_file_name NOT IN('Prompt1','Conclusion_Prompt_1','silent')
ORDER BY callid ASC) t1
JOIN (SELECT MAX(date_played) AS date_played
FROM insert_log GROUP BY callid) t2
ON t1.date_played = t2.date_played
I'm using nGram, too. I use standard tokenizer and nGram just as a filter. Here is my setup:
{
"index": {
"index": "my_idx",
"type": "my_type",
"analysis": {
"index_analyzer": {
"my_index_analyzer": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"mynGram"
]
}
},
"search_analyzer": {
"my_search_analyzer": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"standard",
"lowercase",
"mynGram"
]
}
},
"filter": {
"mynGram": {
"type": "nGram",
"min_gram": 2,
"max_gram": 50
}
}
}
}
}
Let's you find word parts up to 50 letters. Adjust the max_gram as you need. In german words can get really big, so I set it to a high value.
If your git version is >= 1.6.1, you can use git reset --merge
.
Also, as @Michael Johnson mentions, if your git version is >= 1.7.4, you can also use git merge --abort
.
As always, make sure you have no uncommitted changes before you start a merge.
From the git merge man page
git merge --abort
is equivalent to git reset --merge
when MERGE_HEAD
is present.
MERGE_HEAD
is present when a merge is in progress.
Also, regarding uncommitted changes when starting a merge:
If you have changes you don't want to commit before starting a merge, just git stash
them before the merge and git stash pop
after finishing the merge or aborting it.
Minimal runnable example
glOrtho
: 2D games, objects close and far appear the same size:
glFrustrum
: more real-life like 3D, identical objects further away appear smaller:
main.c
#include <stdlib.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
static int ortho = 0;
static void display(void) {
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
if (ortho) {
} else {
/* This only rotates and translates the world around to look like the camera moved. */
gluLookAt(0.0, 0.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}
glColor3f(1.0f, 1.0f, 1.0f);
glutWireCube(2);
glFlush();
}
static void reshape(int w, int h) {
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (ortho) {
glOrtho(-2.0, 2.0, -2.0, 2.0, -1.5, 1.5);
} else {
glFrustum(-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
}
glMatrixMode(GL_MODELVIEW);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
if (argc > 1) {
ortho = 1;
}
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
glutCreateWindow(argv[0]);
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_FLAT);
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
return EXIT_SUCCESS;
}
Compile:
gcc -ggdb3 -O0 -o main -std=c99 -Wall -Wextra -pedantic main.c -lGL -lGLU -lglut
Run with glOrtho
:
./main 1
Run with glFrustrum
:
./main
Tested on Ubuntu 18.10.
Schema
Ortho: camera is a plane, visible volume a rectangle:
Frustrum: camera is a point,visible volume a slice of a pyramid:
Parameters
We are always looking from +z to -z with +y upwards:
glOrtho(left, right, bottom, top, near, far)
left
: minimum x
we seeright
: maximum x
we seebottom
: minimum y
we seetop
: maximum y
we see-near
: minimum z
we see. Yes, this is -1
times near
. So a negative input means positive z
.-far
: maximum z
we see. Also negative.Schema:
How it works under the hood
In the end, OpenGL always "uses":
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
If we use neither glOrtho
nor glFrustrum
, that is what we get.
glOrtho
and glFrustrum
are just linear transformations (AKA matrix multiplication) such that:
glOrtho
: takes a given 3D rectangle into the default cubeglFrustrum
: takes a given pyramid section into the default cubeThis transformation is then applied to all vertexes. This is what I mean in 2D:
The final step after transformation is simple:
x
, y
and z
are in [-1, +1]
z
component and take only x
and y
, which now can be put into a 2D screenWith glOrtho
, z
is ignored, so you might as well always use 0
.
One reason you might want to use z != 0
is to make sprites hide the background with the depth buffer.
Deprecation
glOrtho
is deprecated as of OpenGL 4.5: the compatibility profile 12.1. "FIXED-FUNCTION VERTEX TRANSFORMATIONS" is in red.
So don't use it for production. In any case, understanding it is a good way to get some OpenGL insight.
Modern OpenGL 4 programs calculate the transformation matrix (which is small) on the CPU, and then give the matrix and all points to be transformed to OpenGL, which can do the thousands of matrix multiplications for different points really fast in parallel.
Manually written vertex shaders then do the multiplication explicitly, usually with the convenient vector data types of the OpenGL Shading Language.
Since you write the shader explicitly, this allows you to tweak the algorithm to your needs. Such flexibility is a major feature of more modern GPUs, which unlike the old ones that did a fixed algorithm with some input parameters, can now do arbitrary computations. See also: https://stackoverflow.com/a/36211337/895245
With an explicit GLfloat transform[]
it would look something like this:
glfw_transform.c
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
static const GLuint WIDTH = 800;
static const GLuint HEIGHT = 600;
/* ourColor is passed on to the fragment shader. */
static const GLchar* vertex_shader_source =
"#version 330 core\n"
"layout (location = 0) in vec3 position;\n"
"layout (location = 1) in vec3 color;\n"
"out vec3 ourColor;\n"
"uniform mat4 transform;\n"
"void main() {\n"
" gl_Position = transform * vec4(position, 1.0f);\n"
" ourColor = color;\n"
"}\n";
static const GLchar* fragment_shader_source =
"#version 330 core\n"
"in vec3 ourColor;\n"
"out vec4 color;\n"
"void main() {\n"
" color = vec4(ourColor, 1.0f);\n"
"}\n";
static GLfloat vertices[] = {
/* Positions Colors */
0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.5f, 0.0f, 0.0f, 0.0f, 1.0f
};
/* Build and compile shader program, return its ID. */
GLuint common_get_shader_program(
const char *vertex_shader_source,
const char *fragment_shader_source
) {
GLchar *log = NULL;
GLint log_length, success;
GLuint fragment_shader, program, vertex_shader;
/* Vertex shader */
vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex_shader, 1, &vertex_shader_source, NULL);
glCompileShader(vertex_shader);
glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
glGetShaderiv(vertex_shader, GL_INFO_LOG_LENGTH, &log_length);
log = malloc(log_length);
if (log_length > 0) {
glGetShaderInfoLog(vertex_shader, log_length, NULL, log);
printf("vertex shader log:\n\n%s\n", log);
}
if (!success) {
printf("vertex shader compile error\n");
exit(EXIT_FAILURE);
}
/* Fragment shader */
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment_shader, 1, &fragment_shader_source, NULL);
glCompileShader(fragment_shader);
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
glGetShaderiv(fragment_shader, GL_INFO_LOG_LENGTH, &log_length);
if (log_length > 0) {
log = realloc(log, log_length);
glGetShaderInfoLog(fragment_shader, log_length, NULL, log);
printf("fragment shader log:\n\n%s\n", log);
}
if (!success) {
printf("fragment shader compile error\n");
exit(EXIT_FAILURE);
}
/* Link shaders */
program = glCreateProgram();
glAttachShader(program, vertex_shader);
glAttachShader(program, fragment_shader);
glLinkProgram(program);
glGetProgramiv(program, GL_LINK_STATUS, &success);
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
if (log_length > 0) {
log = realloc(log, log_length);
glGetProgramInfoLog(program, log_length, NULL, log);
printf("shader link log:\n\n%s\n", log);
}
if (!success) {
printf("shader link error");
exit(EXIT_FAILURE);
}
/* Cleanup. */
free(log);
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
return program;
}
int main(void) {
GLint shader_program;
GLint transform_location;
GLuint vbo;
GLuint vao;
GLFWwindow* window;
double time;
glfwInit();
window = glfwCreateWindow(WIDTH, HEIGHT, __FILE__, NULL, NULL);
glfwMakeContextCurrent(window);
glewExperimental = GL_TRUE;
glewInit();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glViewport(0, 0, WIDTH, HEIGHT);
shader_program = common_get_shader_program(vertex_shader_source, fragment_shader_source);
glGenVertexArrays(1, &vao);
glGenBuffers(1, &vbo);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
/* Position attribute */
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
/* Color attribute */
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glBindVertexArray(0);
while (!glfwWindowShouldClose(window)) {
glfwPollEvents();
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(shader_program);
transform_location = glGetUniformLocation(shader_program, "transform");
/* THIS is just a dummy transform. */
GLfloat transform[] = {
0.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
time = glfwGetTime();
transform[0] = 2.0f * sin(time);
transform[5] = 2.0f * cos(time);
glUniformMatrix4fv(transform_location, 1, GL_FALSE, transform);
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLES, 0, 3);
glBindVertexArray(0);
glfwSwapBuffers(window);
}
glDeleteVertexArrays(1, &vao);
glDeleteBuffers(1, &vbo);
glfwTerminate();
return EXIT_SUCCESS;
}
Compile and run:
gcc -ggdb3 -O0 -o glfw_transform.out -std=c99 -Wall -Wextra -pedantic glfw_transform.c -lGL -lGLU -lglut -lGLEW -lglfw -lm
./glfw_transform.out
Output:
The matrix for glOrtho
is really simple, composed only of scaling and translation:
scalex, 0, 0, translatex,
0, scaley, 0, translatey,
0, 0, scalez, translatez,
0, 0, 0, 1
as mentioned in the OpenGL 2 docs.
The glFrustum
matrix is not too hard to calculate by hand either, but starts getting annoying. Note how frustum cannot be made up with only scaling and translations like glOrtho
, more info at: https://gamedev.stackexchange.com/a/118848/25171
The GLM OpenGL C++ math library is a popular choice for calculating such matrices. http://glm.g-truc.net/0.9.2/api/a00245.html documents both an ortho
and frustum
operations.
curl will encode the data for you, just drop your raw field data into the fields array and tell it to "go".
This one is great:
<style type="text/css">
textarea.test
{
width: 100%;
height: 100%;
border-color: Transparent;
}
</style>
<textarea class="test"></textarea>
Another example using Blob()
Code:
function save(url, params, fileName){
$http.get(url, {params: params}).success(function(exporter) {
var blob = new Blob([exporter], {type: "text/plain;charset=utf-8;"});
saveAs(blob, fileName);
}).error(function(err) {
console.log('err', err);
});
};
// Save as Code
function saveAs(blob, fileName){
var url = window.URL.createObjectURL(blob);
var doc = document.createElement("a");
doc.href = url;
doc.download = fileName;
doc.click();
window.URL.revokeObjectURL(url);
}
If you're using Lombok on a POJO model, make sure you have these annotations:
@Getter
@Builder
@NoArgsConstructor
@AllArgsConstructor
It could vary, but make sure @Getter
and especially @NoArgsConstructor
.
You can also do this to set a header for all future gets for the Session object, where x-test will be in all s.get() calls:
s = requests.Session()
s.auth = ('user', 'pass')
s.headers.update({'x-test': 'true'})
# both 'x-test' and 'x-test2' are sent
s.get('http://httpbin.org/headers', headers={'x-test2': 'true'})
from: http://docs.python-requests.org/en/latest/user/advanced/#session-objects
You will need to configure your Win7 PC as a Time Server, and then configure the RasPi to connect to it for NTP services.
Configure Win7 as authoritative time server. Configure RasPi time server lookup.
Here, &
is not used as an operator. As part of function or variable declarations, &
denotes a reference. The C++ FAQ Lite has a pretty nifty chapter on references.
$sXML = download_page('http://alanstorm.com/atom');
// Comment This
// $oXML = new SimpleXMLElement($sXML);
// foreach($oXML->entry as $oEntry){
// echo $oEntry->title . "\n";
// }
// Use json encode
$xml = simplexml_load_string($sXML);
$json = json_encode($xml);
$arr = json_decode($json,true);
print_r($arr);
Another difference is when async
function returns just Task
instead of Task<T>
then you cannot use
GetFooAsync(...).Result;
Whereas
GetFooAsync(...).GetAwaiter().GetResult();
still works.
I know the example code in the question is for the case Task<T>
, however the question is asked generally.
I know this question is pretty old, but figured I'd share some demo code this question helped me with.
Button
and a DataGridView
Click
event for button1CellClick
event for DataGridView1EditMode
to EditProgrammatically
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
DataTable m_dataTable;
DataTable table { get { return m_dataTable; } set { m_dataTable = value; } }
private const string m_nameCol = "Name";
private const string m_choiceCol = "Choice";
public Form1()
{
InitializeComponent();
}
class Options
{
public int m_Index { get; set; }
public string m_Text { get; set; }
}
private void button1_Click(object sender, EventArgs e)
{
table = new DataTable();
table.Columns.Add(m_nameCol);
table.Rows.Add(new object[] { "Foo" });
table.Rows.Add(new object[] { "Bob" });
table.Rows.Add(new object[] { "Timn" });
table.Rows.Add(new object[] { "Fred" });
dataGridView1.DataSource = table;
if (!dataGridView1.Columns.Contains(m_choiceCol))
{
DataGridViewTextBoxColumn txtCol = new DataGridViewTextBoxColumn();
txtCol.Name = m_choiceCol;
dataGridView1.Columns.Add(txtCol);
}
List<Options> oList = new List<Options>();
oList.Add(new Options() { m_Index = 0, m_Text = "None" });
for (int i = 1; i < 10; i++)
{
oList.Add(new Options() { m_Index = i, m_Text = "Op" + i });
}
for (int i = 0; i < dataGridView1.Rows.Count - 1; i += 2)
{
DataGridViewComboBoxCell c = new DataGridViewComboBoxCell();
//Setup A
c.DataSource = oList;
c.Value = oList[0].m_Text;
c.ValueMember = "m_Text";
c.DisplayMember = "m_Text";
c.ValueType = typeof(string);
////Setup B
//c.DataSource = oList;
//c.Value = 0;
//c.ValueMember = "m_Index";
//c.DisplayMember = "m_Text";
//c.ValueType = typeof(int);
//Result is the same A or B
dataGridView1[m_choiceCol, i] = c;
}
}
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
if (dataGridView1.CurrentCell.ColumnIndex == dataGridView1.Columns.IndexOf(dataGridView1.Columns[m_choiceCol]))
{
DataGridViewCell cell = dataGridView1[m_choiceCol, e.RowIndex];
dataGridView1.CurrentCell = cell;
dataGridView1.BeginEdit(true);
}
}
}
}
}
Note that the column index numbers can change from multiple button presses of button one, so I always refer to the columns by name not index value. I needed to incorporate David Hall's answer into my demo that already had ComboBoxes so his answer worked really well.
Be careful, in some cases clicking on a Form Control or Active X Control will give two different results for the same macro - which should not be the case. I find Active X more reliable.
One easy solution is to use delayed expansion, as this doesn't change any special characters.
set "line=<?xml version="1.0" encoding="utf-8" ?>"
setlocal EnableDelayedExpansion
(
echo !line!
) > myfile.xml
EDIT : Another solution is to use a disappearing quote.
This technic uses a quotation mark to quote the special characters
@echo off
setlocal EnableDelayedExpansion
set ""="
echo !"!<?xml version="1.0" encoding="utf-8" ?>
The trick works, as in the special characters phase the leading quotation mark in !"!
will preserve the rest of the line (if there aren't other quotes).
And in the delayed expansion phase the !"!
will replaced with the content of the variable "
(a single quote is a legal name!).
If you are working with disabled delayed expansion, you could use a FOR /F
loop instead.
for /f %%^" in ("""") do echo(%%~" <?xml version="1.0" encoding="utf-8" ?>
But as the seems to be a bit annoying you could also build a macro.
set "print=for /f %%^" in ("""") do echo(%%~""
%print%<?xml version="1.0" encoding="utf-8" ?>
%print% Special characters like &|<>^ works now without escaping
jqXHR.done(function( data, textStatus, jqXHR ) {});
An alternative construct to the success callback option, the .done() method replaces the deprecated jqXHR.success() method. Refer to deferred.done() for implementation details.
The point it is just an alternative for success callback option, and jqXHR.success()
is deprecated.
Open the SVG with you text editor. If you have some luck the file will contain something like:
<path d="M52.52,26.064c-1.612,0-3.149,0.336-4.544,0.939L43.179,15.89c-0.122-0.283-0.337-0.484-0.58-0.637 c-0.212-0.147-0.459-0.252-0.738-0.252h-8.897c-0.743,0-1.347,0.603-1.347,1.347c0,0.742,0.604,1.345,1.347,1.345h6.823 c0.331,0.018,1.022,0.139,1.319,0.825l0.54,1.247l0,0L41.747,20c0.099,0.291,0.139,0.749-0.604,0.749H22.428 c-0.857,0-1.262-0.451-1.434-0.732l-0.11-0.221v-0.003l-0.552-1.092c0,0,0,0,0-0.001l-0.006-0.011l-0.101-0.2l-0.012-0.002 l-0.225-0.405c-0.049-0.128-0.031-0.337,0.65-0.337h2.601c0,0,1.528,0.127,1.57-1.274c0.021-0.722-0.487-1.464-1.166-1.464 c-0.68,0-9.149,0-9.149,0s-1.464-0.17-1.549,1.369c0,0.688,0.571,1.369,1.379,1.369c0.295,0,0.7-0.003,1.091-0.007 c0.512,0.014,1.389,0.121,1.677,0.679l0,0l0.117,0.219c0.287,0.564,0.751,1.473,1.313,2.574c0.04,0.078,0.083,0.166,0.126,0.246 c0.107,0.285,0.188,0.807-0.208,1.483l-2.403,4.082c-1.397-0.606-2.937-0.947-4.559-0.947c-6.329,0-11.463,5.131-11.463,11.462 S5.15,48.999,11.479,48.999c5.565,0,10.201-3.968,11.243-9.227l5.767,0.478c0.235,0.02,0.453-0.04,0.654-0.127 c0.254-0.043,0.507-0.128,0.713-0.311l13.976-12.276c0.192-0.164,0.874-0.679,1.151-0.039l0.446,1.035 c-2.659,2.099-4.372,5.343-4.372,8.995c0,6.329,5.131,11.461,11.462,11.461c6.329,0,11.464-5.132,11.464-11.461 C63.983,31.196,58.849,26.064,52.52,26.064z M11.479,46.756c-4.893,0-8.861-3.968-8.861-8.861s3.969-8.859,8.861-8.859 c1.073,0,2.098,0.201,3.051,0.551l-4.178,7.098c-0.119,0.202-0.167,0.418-0.183,0.633c-0.003,0.022-0.015,0.036-0.016,0.054 c-0.007,0.091,0.02,0.172,0.03,0.258c0.008,0.054,0.004,0.105,0.018,0.158c0.132,0.559,0.592,1,1.193,1.05l8.782,0.727 C19.397,43.655,15.802,46.756,11.479,46.756z M15.169,36.423c-0.003-0.002-0.003-0.002-0.006-0.002 c-1.326-0.109-0.482-1.621-0.436-1.704l2.224-3.78c1.801,1.418,3.037,3.515,3.32,5.908L15.169,36.423z M25.607,37.285l-2.688-0.223 c-0.144-3.521-1.87-6.626-4.493-8.629l1.085-1.842c0.938-1.593,1.756,0.001,1.756,0.001l0,0c1.772,3.48,3.65,7.169,4.745,9.331 C26.012,35.924,26.746,37.379,25.607,37.285z M43.249,24.273L30.78,35.225c0,0.002,0,0.002,0,0.002 c-1.464,1.285-2.177-0.104-2.188-0.127l-5.297-10.517l0,0c-0.471-0.936,0.41-1.062,0.805-1.073h17.926c0,0,1.232-0.012,1.354,0.267 v0.002C43.458,23.961,43.473,24.077,43.249,24.273z M52.52,46.745c-4.891,0-8.86-3.968-8.86-8.858c0-2.625,1.146-4.976,2.962-6.599 l2.232,5.174c0.421,0.977,0.871,1.061,0.978,1.065h0.023h1.674c0.9,0,0.592-0.913,0.473-1.199l-2.862-6.631 c1.043-0.43,2.184-0.672,3.381-0.672c4.891,0,8.861,3.967,8.861,8.861C61.381,42.777,57.41,46.745,52.52,46.745z" fill="#241F20"/>
The d
attribute is what you are looking for.
Some great answers above, using that info here is what I did today to solve the same issue:
$to_array = explode(',', $to);
foreach($to_array as $address)
{
$mail->addAddress($address, 'Web Enquiry');
}
To avoid syntax errors, be sure to always put BEGIN
and END
after an IF
clause, eg:
IF (@A!= @SA)
BEGIN
--do stuff
END
IF (@C!= @SC)
BEGIN
--do stuff
END
... and so on. This should work as expected. Imagine BEGIN
and END
keyword as the opening and closing bracket, respectively.
Suppose you want to calculate the male–female ratios for various school clubs, but you discover that the following query fails and issues a divide-by-zero error when it tries to calculate ratio for the Lord of the Rings Club, which has no women:
SELECT club_id, males, females, males/females AS ratio
FROM school_clubs;
You can use the function NULLIF
to avoid division by zero. NULLIF
compares two expressions and returns null if they are equal or the first expression otherwise.
Rewrite the query as:
SELECT club_id, males, females, males/NULLIF(females, 0) AS ratio
FROM school_clubs;
Any number divided by NULL
gives NULL
, and no error is generated.
HTML
<input name="email" placeholder="Email" (blur)="$event.target.value=removeSpaces($event.target.value)" value="">
TS
removeSpaces(string) {
let splitStr = string.split(' ').join('');
return splitStr;
}
I don't know if maybe it's a difference in Excel version but this question is 6 years old and the accepted answer didn't help me so this is what I figured out:
Under Conditional Formatting > Manage Rules:
$A2<$B2
$B$2:$B$100
(assuming you have 100 rows)This worked for me in Excel 2016.
savez() save data in a zip file, It may take some time to zip & unzip the file. You can use save() & load() function:
f = file("tmp.bin","wb")
np.save(f,a)
np.save(f,b)
np.save(f,c)
f.close()
f = file("tmp.bin","rb")
aa = np.load(f)
bb = np.load(f)
cc = np.load(f)
f.close()
To save multiple arrays in one file, you just need to open the file first, and then save or load the arrays in sequence.
Here's an easy way without ifelse
:
(a/sum(a))^(a>0)
An example:
a <- c(0, 1, 0, 0, 1, 1, 0, 1)
(a/sum(a))^(a>0)
[1] 1.00 0.25 1.00 1.00 0.25 0.25 1.00 0.25
You can do this conversion with the OpenSSL library
Windows binaries can be found here:
http://www.slproweb.com/products/Win32OpenSSL.html
Once you have the library installed, the command you need to issue is:
openssl x509 -in mycert.crt -out mycert.pem -outform PEM
Use aggregation on name
and get name
with count > 1
:
db.collection.aggregate([
{"$group" : { "_id": "$name", "count": { "$sum": 1 } } },
{"$match": {"_id" :{ "$ne" : null } , "count" : {"$gt": 1} } },
{"$project": {"name" : "$_id", "_id" : 0} }
]);
To sort the results by most to least duplicates:
db.collection.aggregate([
{"$group" : { "_id": "$name", "count": { "$sum": 1 } } },
{"$match": {"_id" :{ "$ne" : null } , "count" : {"$gt": 1} } },
{"$sort": {"count" : -1} },
{"$project": {"name" : "$_id", "_id" : 0} }
]);
To use with another column name than "name", change "$name" to "$column_name"
My solution using File Provider
private void viewGallery(File file) {
Uri mImageCaptureUri = FileProvider.getUriForFile(
mContext,
mContext.getApplicationContext()
.getPackageName() + ".provider", file);
Intent view = new Intent();
view.setAction(Intent.ACTION_VIEW);
view.setData(mImageCaptureUri);
List < ResolveInfo > resInfoList =
mContext.getPackageManager()
.queryIntentActivities(view, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo: resInfoList) {
String packageName = resolveInfo.activityInfo.packageName;
mContext.grantUriPermission(packageName, mImageCaptureUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
view.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(mImageCaptureUri, "image/*");
mContext.startActivity(intent);
}
You can try JsonUnit. It can compare two JSON objects and report differences. It's built on top of Jackson.
For example
assertThatJson("{\"test\":1}").isEqualTo("{\n\"test\": 2\n}");
Results in
java.lang.AssertionError: JSON documents are different:
Different value found in node "test". Expected 1, got 2.
If your example represents your real code, the problem is not in the push
, it's that your constructor doesn't do anything.
You need to declare and initialize the x
and y
members.
Explicitly:
export class Pixel {
public x: number;
public y: number;
constructor(x: number, y: number) {
this.x = x;
this.y = y;
}
}
Or implicitly:
export class Pixel {
constructor(public x: number, public y: number) {}
}
Select the Object -> Format -> Selection Pane -> Double click to change the name
@RobSadler:
RE Martin Wickman's CSS only version...
You can get around that problem by putting accordion-caret on the anchor tag and giving it a collapsed class by default. Like so:
<div class="accordion-group">
<div class="accordion-heading">
<a class="accordion-toggle accordion-caret collapsed" data-toggle="collapse" href="#collapseOne">
<strong>Header</strong>
</a>
</div>
<div id="collapseOne" class="accordion-body collapse in">
<div class="accordion-inner">
Content
</div>
</div>
That worked for me.
How about this?
class name(str):
def __init__(self, name):
print (name)
# ------
person1 = name("jean")
person2 = name("dean")
print('===')
print(person1)
print(person2)
Output:
jean
dean
===
jean
dean
Once I faced with the issue when I did not know which the element currently stored in my variable (svg or html) but I needed to get it width and height. I created this function and want to share it:
function computeDimensions(selection) {
var dimensions = null;
var node = selection.node();
if (node instanceof SVGGraphicsElement) { // check if node is svg element
dimensions = node.getBBox();
} else { // else is html element
dimensions = node.getBoundingClientRect();
}
console.log(dimensions);
return dimensions;
}
Little demo in the hidden snippet below. We handle click on the blue div and on the red svg circle with the same function.
var svg = d3.select('svg')
.attr('width', 50)
.attr('height', 50);
function computeDimensions(selection) {
var dimensions = null;
var node = selection.node();
if (node instanceof SVGElement) {
dimensions = node.getBBox();
} else {
dimensions = node.getBoundingClientRect();
}
console.clear();
console.log(dimensions);
return dimensions;
}
var circle = svg
.append("circle")
.attr("r", 20)
.attr("cx", 30)
.attr("cy", 30)
.attr("fill", "red")
.on("click", function() { computeDimensions(circle); });
var div = d3.selectAll("div").on("click", function() { computeDimensions(div) });
_x000D_
* {
margin: 0;
padding: 0;
border: 0;
}
body {
background: #ffd;
}
.div {
display: inline-block;
background-color: blue;
margin-right: 30px;
width: 30px;
height: 30px;
}
_x000D_
<h3>
Click on blue div block or svg circle
</h3>
<svg></svg>
<div class="div"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.11.0/d3.min.js"></script>
_x000D_
As an extension to @VinaySajip answer. There are additional nargs
worth mentioning.
parser.add_argument('dir', nargs=1, default=os.getcwd())
N (an integer). N arguments from the command line will be gathered together into a list
parser.add_argument('dir', nargs='*', default=os.getcwd())
'*'. All command-line arguments present are gathered into a list. Note that it generally doesn't make much sense to have more than one positional argument with nargs='*'
, but multiple optional arguments with nargs='*'
is possible.
parser.add_argument('dir', nargs='+', default=os.getcwd())
'+'. Just like '*', all command-line args present are gathered into a list. Additionally, an error message will be generated if there wasn’t at least one command-line argument present.
parser.add_argument('dir', nargs=argparse.REMAINDER, default=os.getcwd())
argparse.REMAINDER
. All the remaining command-line arguments are gathered into a list. This is commonly useful for command line utilities that dispatch to other command line utilities
If the nargs
keyword argument is not provided, the number of arguments consumed is determined by the action. Generally this means a single command-line argument will be consumed and a single item (not a list) will be produced.
Edit (copied from a comment by @Acumenus) nargs='?'
The docs say: '?'. One argument will be consumed from the command line if possible and produced as a single item. If no command-line argument is present, the value from default will be produced.
Easy as pie:
Open Eclipse and go to Help-> Software Updates-> Find and Install Select "Search for new features to install" and click "Next" Create a New Remote Site with the following details:
Name: PDT
URL: http://download.eclipse.org/tools/pdt/updates/4.0.1
Get the latest above mentioned URLfrom -
http://www.eclipse.org/pdt/index.html#download
Check the PDT box and click "Next" to start the installation
Hope it helps
The answer from Pragna does not work always, try this:
mScrollView.post(new Runnable() {
public void run() {
mScrollView.scrollTo(0, mScrollView.getBottom());
}
});
or
mScrollView.post(new Runnable() {
public void run() {
mScrollView.fullScroll(mScrollView.FOCUS_DOWN);
}
});
if You want to scroll to start
mScrollView.post(new Runnable() {
public void run() {
mScrollView.fullScroll(mScrollView.FOCUS_UP);
}
});
//?Creating a new row with the structure of the table:
DataTable table = new DataTable();
DataRow row = table.NewRow();
table.Rows.Add(row);
//Giving values to the columns of the row(this row is supposed to have 28 columns):
for (int i = 0; i < 28; i++)
{
row[i] = i.ToString();
}
Java is faster than Python. Easily.
Python is favorable for many things; speed isn't necessarily one of them.
1.one-off uses
List<T> list=Arrays.asList(...)
list.contains(...)
2.use HashSet for performance consideration if you use more than once.
Set <T>set =new HashSet<T>(Arrays.asList(...));
set.contains(...)
I don't know about MySQL, but in MS SQL, you can use the column index in the order by
clause. I've done this before when doing counts with group by
s as it tends to be easier to work with.
So
SELECT COUNT(id), `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY COUNT(id) DESC
LIMIT 20
Becomes
SELECT COUNT(id), `Tag` from `images-tags`
GROUP BY `Tag`
ORDER 1 DESC
LIMIT 20
Fiddler2 -> Rules -> Custom Rules
then find function OnBeforeRequest on put in the next script at the end:
if (oSession.HostnameIs("mysite.com")){
oSession.host="localhost:39901";
}
To launch command prompt in administrator mode
attrib -h -r -s /s /d "location of the drive letter:" \*.*
count of the contained lists in the outmost list
int count = data.size();
lambda to get the count of the contained inner lists
int count = data.stream().collect( summingInt(l -> l.size()) );
I presume you mean curve-fitting and not anti-aliasing from the context of your question. PyPlot doesn't have any built-in support for this, but you can easily implement some basic curve-fitting yourself, like the code seen here, or if you're using GuiQwt it has a curve fitting module. (You could probably also steal the code from SciPy to do this as well).
$query = "ALTER TABLE `" . $table_prefix . "posts_to_bookmark`
ADD COLUMN `ping_status` INT(1) NOT NULL
AFTER `<TABLE COLUMN BEFORE THIS COLUMN>`";
I believe you need to have ADD COLUMN
and use AFTER
, not BEFORE
.
In case you want to place column at the beginning of a table, use the FIRST
statement:
$query = "ALTER TABLE `" . $table_prefix . "posts_to_bookmark`
ADD COLUMN `ping_status` INT(1) NOT NULL
FIRST";
The easiest way is this.
byte[] bytes = rs.getBytes("my_field");
Use:
import color
class Color(color.Color):
...
If this were Python 2.x, you would also want to derive color.Color
from object
, to make it a new-style class:
class Color(object):
...
This is not necessary in Python 3.x.
I created a module that works equal to the official Broadcastchannel but has fallbacks based on localstorage, indexeddb and unix-sockets. This makes sure it always works even with Webworkers or NodeJS. See pubkey:BroadcastChannel
Lets say you have Class A as superclass and Class B subclass of A.
public class A {
public void printFromA(){
System.out.println("Inside A");
}
}
public class B extends A {
public void printFromB(){
System.out.println("Inside B");
}
}
public class MainClass {
public static void main(String []args){
A a = new B();
a.printFromA(); //this can be called without typecasting
((B)a).printFromB(); //the method printFromB needs to be typecast
}
}
you can define it like this :
let table = $('.datatable-sales').DataTable({
processing: true,
responsive: true,
serverSide: true,
ajax: {
url: "<?php echo site_url("your url"); ?>",
cache: false,
type: "POST",
data: {
<?php echo your api; ?>,
}
}
or like this :
$.get({url: <?php echo json_encode(site_url('your api'))?>, cache: false})
hope it helps
u = urllib2.urlopen('http://myserver/inout-tracker', data)
h.request('POST', '/inout-tracker/index.php', data, headers)
Using the path /inout-tracker
without a trailing /
doesn't fetch index.php
. Instead the server will issue a 302
redirect to the version with the trailing /
.
Doing a 302 will typically cause clients to convert a POST to a GET request.
SELECT l.*
FROM (
SELECT DISTINCT usr_id
FROM lives
) lo, lives l
WHERE l.ctid = (
SELECT ctid
FROM lives li
WHERE li.usr_id = lo.usr_id
ORDER BY
time_stamp DESC, trans_id DESC
LIMIT 1
)
Creating an index on (usr_id, time_stamp, trans_id)
will greatly improve this query.
You should always, always have some kind of PRIMARY KEY
in your tables.
In my case I was making an connection through pgAdmin with ssh tunneling and set to host field ip address but it was necessary to set localhost
You can do something like this to read 10 bytes:
char buffer[10];
read(STDIN_FILENO, buffer, 10);
remember read() doesn't add '\0'
to terminate to make it string (just gives raw buffer).
To read 1 byte at a time:
char ch;
while(read(STDIN_FILENO, &ch, 1) > 0)
{
//do stuff
}
and don't forget to #include <unistd.h>
, STDIN_FILENO
defined as macro in this file.
There are three standard POSIX file descriptors, corresponding to the three standard streams, which presumably every process should expect to have:
Integer value Name
0 Standard input (stdin)
1 Standard output (stdout)
2 Standard error (stderr)
So instead STDIN_FILENO
you can use 0.
Edit:
In Linux System you can find this using following command:
$ sudo grep 'STDIN_FILENO' /usr/include/* -R | grep 'define'
/usr/include/unistd.h:#define STDIN_FILENO 0 /* Standard input. */
Notice the comment /* Standard input. */
I know this is an old thread, but for any future visitors, the cause of this error is most likely because you haven't built your project from Build > Build Solution
. The reason you're getting this error when you try to run your project is because Visual Studio can't find the executable file that should be produced when you build your project.
I would prefer:
try
{
...
}
catch (FooException fe){
throw fe;
}
catch (Exception e)
{
// Note: don't catch all exceptions like this unless you know what you
// are doing.
...
}
You just need to do:
#!/bin/bash
count=$(cat last_queries.txt | wc -l)
$(perl test.pl test2 $count)
However, if you want to call your Perl command later, and that's why you want to assign it to a variable, then:
#!/bin/bash
count=$(cat last_queries.txt | wc -l)
var="perl test.pl test2 $count" # You need double quotes to get your $count value substituted.
...stuff...
eval $var
As per Bash's help:
~$ help eval
eval: eval [arg ...]
Execute arguments as a shell command.
Combine ARGs into a single string, use the result as input to the shell,
and execute the resulting commands.
Exit Status:
Returns exit status of command or success if command is null.
In addition to the extensions which are maintained and provided by the core PostgreSQL development team, there are extensions available from third parties. Notably, there is a site dedicated to that purpose: http://www.pgxn.org/
Use HeidiSQL. Its free and a very good db tool.
From tools menu, enter Bulk table editor
Select the complete database or pick tables to convert,
Execute
This converts complete database from latin to utf8 in just a few seconds.
Works like a charm :)
HeidiSQL connects by default as utf8 so any special characters should now be seen as the character (æ ø å) and not as encoded when inspecting the table data.
The real pitfall when moving from latin to utf8 is to make sure pdo connects with utf8 charset. If not you will get rubbish data inserted to the utf8 table and question marks all over the place on your web page, making you think the table data is not utf8...
If you are using navigationController
then add the UINavigationControllerDelegate
protocol to class and add the delegate method as follows:
class ViewController:UINavigationControllerDelegate {
func navigationController(navigationController: UINavigationController, willShowViewController viewController: UIViewController,
animated: Bool) {
if viewController === self {
// do here what you want
}
}
}
This method is called whenever the navigation controller will slide to a new screen. If the back button was pressed, the new view controller is ViewController
itself.
I would do this:
data["list"].append({'b':'2'})
so simply you are adding an object to the list that is present in "data"
There is no syntax for block quote in VBA. The work around is to use the button to quickly block or unblock multiple lines of code.
Add <br style="clear: both" />
after the last floated div worked for me.
Right click on the page and choose 'inspect element'. In the screen that opens now (the developer tools), clicking the second icon from the left @ the bottom of it opens a console, where you can type javascript. The console is linked to the current page.
People already mentioned that
Task.Run(A);
Is equivalent to
Task.Factory.StartNew(A, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
But no one mentioned that
Task.Factory.StartNew(A);
Is equivalent to:
Task.Factory.StartNew(A, CancellationToken.None, TaskCreationOptions.None, TaskScheduler.Current);
As you can see two parameters are different for Task.Run
and Task.Factory.StartNew
:
TaskCreationOptions
- Task.Run
uses TaskCreationOptions.DenyChildAttach
which means that children tasks can not be attached to the parent, consider this:
var parentTask = Task.Run(() =>
{
var childTask = new Task(() =>
{
Thread.Sleep(10000);
Console.WriteLine("Child task finished.");
}, TaskCreationOptions.AttachedToParent);
childTask.Start();
Console.WriteLine("Parent task finished.");
});
parentTask.Wait();
Console.WriteLine("Main thread finished.");
When we invoke parentTask.Wait()
, childTask
will not be awaited, even though we specified TaskCreationOptions.AttachedToParent
for it, this is because TaskCreationOptions.DenyChildAttach
forbids children to attach to it. If you run the same code with Task.Factory.StartNew
instead of Task.Run
, parentTask.Wait()
will wait for childTask
because Task.Factory.StartNew
uses TaskCreationOptions.None
TaskScheduler
- Task.Run
uses TaskScheduler.Default
which means that the default task scheduler (the one that runs tasks on Thread Pool) will always be used to run tasks. Task.Factory.StartNew
on the other hand uses TaskScheduler.Current
which means scheduler of the current thread, it might be TaskScheduler.Default
but not always. In fact when developing Winforms
or WPF
applications it is required to update UI from the current thread, to do this people use TaskScheduler.FromCurrentSynchronizationContext()
task scheduler, if you unintentionally create another long running task inside task that used TaskScheduler.FromCurrentSynchronizationContext()
scheduler the UI will be frozen. A more detailed explanation of this can be found here
So generally if you are not using nested children task and always want your tasks to be executed on Thread Pool it is better to use Task.Run
, unless you have some more complex scenarios.
This has been asked before on Stack. See the following links:
Basically you just need to set up the thread with a stop function that sets a sentinel value that the thread will check. In your case, you'll have the something in your loop check the sentinel value to see if it's changed and if it has, the loop can break and the thread can die.
Do you have an empty __init__.py
file in both directories to let python know that the dirs are modules?
The basic outline when you are not running from within the folder (ie maybe from pylint's, though I haven't used that) is:
topdir\
__init__.py
functions_etc.py
subdir\
__init__.py
other_functions.py
This is how the python interpreter is aware of the module without reference to the current directory, so if pylint is running from its own absolute path it will be able to access functions_etc.py
as topdir.functions_etc
or topdir.subdir.other_functions
, provided topdir
is on the PYTHONPATH
.
UPDATE: If the problem is not the __init__.py
file, maybe just try copying or moving your module to c:\Python26\Lib\site-packages
-- that is a common place to put additional packages, and will definitely be on your pythonpath. If you know how to do Windows symbolic links or the equivalent (I don't!), you could do that instead. There are many more options here: http://docs.python.org/install/index.html, including the option of appending sys.path with the user-level directory of your development code, but in practice I usually just symbolically link my local development dir to site-packages - copying it over has the same effect.
select T1.name, count (*)
from (select name from Results
union
select name from Archive_Results) as T1
group by T1.name order by T1.name
Just set the outline to none like this
[Identifier] { outline:none; }
Mitch is right. It depends on resources (memory).
Although Raymond's article is dedicated to Windows threads, not to C# threads, the logic applies the same (C# threads are mapped to Windows threads).
However, as we are in C#, if we want to be completely precise, we need to distinguish between "started" and "non started" threads. Only started threads actually reserve stack space (as we could expect). Non started threads only allocate the information required by a thread object (you can use reflector if interested in the actual members).
You can actually test it for yourself, compare:
static void DummyCall()
{
Thread.Sleep(1000000000);
}
static void Main(string[] args)
{
int count = 0;
var threadList = new List<Thread>();
try
{
while (true)
{
Thread newThread = new Thread(new ThreadStart(DummyCall), 1024);
newThread.Start();
threadList.Add(newThread);
count++;
}
}
catch (Exception ex)
{
}
}
with:
static void DummyCall()
{
Thread.Sleep(1000000000);
}
static void Main(string[] args)
{
int count = 0;
var threadList = new List<Thread>();
try
{
while (true)
{
Thread newThread = new Thread(new ThreadStart(DummyCall), 1024);
threadList.Add(newThread);
count++;
}
}
catch (Exception ex)
{
}
}
Put a breakpoint in the exception (out of memory, of course) in VS to see the value of counter. There is a very significant difference, of course.
There are two ways to fix the problem which is caused by the last print
statement.
You can assign the result of the str(c)
call to c
as correctly shown by @jamylak and then concatenate all of the strings, or you can replace the last print
simply with this:
print "a + b as integers: ", c # note the comma here
in which case
str(c)
isn't necessary and can be deleted.
Output of sample run:
Enter a: 3
Enter b: 7
a + b as strings: 37
a + b as integers: 10
with:
a = raw_input("Enter a: ")
b = raw_input("Enter b: ")
print "a + b as strings: " + a + b # + everywhere is ok since all are strings
a = int(a)
b = int(b)
c = a + b
print "a + b as integers: ", c
Do a git status
to find out if your file is actually in your index or the commit.
It is easy as a beginner to misunderstand the index/staging area.
I view it as a 'progress pinboard'. I therefore have to add
the file to the pinboard before I can commit
it (i.e. a copy of the complete pinboard), I have to update the pinboard when required, and I also have to deliberately remove files from it when I've finished with them - simply creating, editing or deleting a file doesn't affect the pinboard. It's like 'storyboarding'.
Edit: As others noted, You should do the edits locally and then push the updated repo, rather than attempt to edit directly on github.
A swift 3 and above example if using Ints in Enum
public enum ECategory : Int{
case Attraction=0, FP, Food, Restroom, Popcorn, Shop, Service, None;
var description: String {
return String(describing: self)
}
}
let category = ECategory.Attraction
let categoryName = category.description //string Attraction
Don't be confused with name..
Java was created at Sun Microsystems (now Oracle).
But, JavaScript was created at Netscape (now Mozilla) in the early days of the Web, and technically, “Java-Script” is a trademark licensed from Sun Microsystems used to describe
Netscape’s implementation of the language. Netscape submitted the
language for standardization to ECMA (European Computer Manufacturer’s Association)
and because of trademark issues, the standardized version of the language
was stuck with the awkward name “ECMAScript.” For the same trademark reasons,
Microsoft’s version of the language is formally known as “JScript.” In practice, just
about everyone calls the language JavaScript. The real name is “ECMAScript”.
Both are fully different languages!!!
Or you could write your own function for it (which is what I ended up doing).
function Join-Path-Recursively($PathParts) {
$NumberOfPathParts = $PathParts.Length;
if ($NumberOfPathParts -eq 0) {
return $null
} elseif ($NumberOfPathParts -eq 1) {
return $PathParts[0]
} else {
return Join-Path -Path $PathParts[0] -ChildPath $(Join-Path-Recursively -PathParts $PathParts[1..($NumberOfPathParts-1)])
}
}
You could then call the function like this:
Join-Path-Recursively -PathParts @("C:", "Program Files", "Microsoft Office")
Join-Path-Recursively @("C:", "Program Files", "Microsoft Office")
This has the advantage of having the exact same behaviour as the normal Join-Path function and not depending on the .NET Framework.
Here is my take on it, seems like most peoples solutions don't check if the item exists and it removes random values if it does not exist.
First check if the element exists by looking for it's index. If it does exist, remove it by its index using the splice method
elementPosition = array.indexOf(value);
if(elementPosition != -1) {
array.splice(elementPosition, 1);
}
For a Fragment you can simply add
getActivity().onBackPressed();
to your code
If you have queries that will be frequently using a relatively static set of columns, creating a single covering index that includes them all will improve performance dramatically.
By putting multiple columns in your index, the optimizer will only have to access the table directly if a column is not in the index. I use these a lot in data warehousing. The downside is that doing this can cost a lot of overhead, especially if the data is very volatile.
Creating indexes on single columns is useful for lookup operations frequently found in OLTP systems.
You should ask yourself why you're indexing the columns and how they'll be used. Run some query plans and see when they are being accessed. Index tuning is as much instinct as science.
A bit corrections. Works perfectly in Opera
$('textarea').bind('keyup keypress', function() {
$(this).height('');
var brCount = this.value.split('\n').length;
this.rows = brCount+1; //++ To remove twitching
var areaH = this.scrollHeight,
lineHeight = $(this).css('line-height').replace('px',''),
calcRows = Math.floor(areaH/lineHeight);
this.rows = calcRows;
});
Do mean to check if $a is a non-empty string? So that it contains just any text? Then the following will work.
If $a contains a string, you can use the following:
if (!empty($a)) { // Means: if not empty
...
}
If you also need to confirm that $a is actually a string, use:
if (is_string($a) && !empty($a)) { // Means: if $a is a string and not empty
...
}
Using
instead of spaces will prevent a break.
<span>I DONT WANT TO BREAK THIS LINE UP, but this text can be on any line.</span>
Actually Java supports 4 methods to parse XML out of the box:
DOM Parser/Builder: The whole XML structure is loaded into memory and you can use the well known DOM methods to work with it. DOM also allows you to write to the document with Xslt transformations. Example:
public static void parse() throws ParserConfigurationException, IOException, SAXException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setIgnoringElementContentWhitespace(true);
DocumentBuilder builder = factory.newDocumentBuilder();
File file = new File("test.xml");
Document doc = builder.parse(file);
// Do something with the document here.
}
SAX Parser: Solely to read a XML document. The Sax parser runs through the document and calls callback methods of the user. There are methods for start/end of a document, element and so on. They're defined in org.xml.sax.ContentHandler and there's an empty helper class DefaultHandler.
public static void parse() throws ParserConfigurationException, SAXException {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
SAXParser saxParser = factory.newSAXParser();
File file = new File("test.xml");
saxParser.parse(file, new ElementHandler()); // specify handler
}
StAx Reader/Writer: This works with a datastream oriented interface. The program asks for the next element when it's ready just like a cursor/iterator. You can also create documents with it. Read document:
public static void parse() throws XMLStreamException, IOException {
try (FileInputStream fis = new FileInputStream("test.xml")) {
XMLInputFactory xmlInFact = XMLInputFactory.newInstance();
XMLStreamReader reader = xmlInFact.createXMLStreamReader(fis);
while(reader.hasNext()) {
reader.next(); // do something here
}
}
}
Write document:
public static void parse() throws XMLStreamException, IOException {
try (FileOutputStream fos = new FileOutputStream("test.xml")){
XMLOutputFactory xmlOutFact = XMLOutputFactory.newInstance();
XMLStreamWriter writer = xmlOutFact.createXMLStreamWriter(fos);
writer.writeStartDocument();
writer.writeStartElement("test");
// write stuff
writer.writeEndElement();
}
}
JAXB: The newest implementation to read XML documents: Is part of Java 6 in v2. This allows us to serialize java objects from a document. You read the document with a class that implements a interface to javax.xml.bind.Unmarshaller (you get a class for this from JAXBContext.newInstance). The context has to be initialized with the used classes, but you just have to specify the root classes and don't have to worry about static referenced classes. You use annotations to specify which classes should be elements (@XmlRootElement) and which fields are elements(@XmlElement) or attributes (@XmlAttribute, what a surprise!)
public static void parse() throws JAXBException, IOException {
try (FileInputStream adrFile = new FileInputStream("test")) {
JAXBContext ctx = JAXBContext.newInstance(RootElementClass.class);
Unmarshaller um = ctx.createUnmarshaller();
RootElementClass rootElement = (RootElementClass) um.unmarshal(adrFile);
}
}
Write document:
public static void parse(RootElementClass out) throws IOException, JAXBException {
try (FileOutputStream adrFile = new FileOutputStream("test.xml")) {
JAXBContext ctx = JAXBContext.newInstance(RootElementClass.class);
Marshaller ma = ctx.createMarshaller();
ma.marshal(out, adrFile);
}
}
Examples shamelessly copied from some old lecture slides ;-)
Edit: About "which API should I use?". Well it depends - not all APIs have the same capabilities as you see, but if you have control over the classes you use to map the XML document JAXB is my personal favorite, really elegant and simple solution (though I haven't used it for really large documents, it could get a bit complex). SAX is pretty easy to use too and just stay away from DOM if you don't have a really good reason to use it - old, clunky API in my opinion. I don't think there are any modern 3rd party libraries that feature anything especially useful that's missing from the STL and the standard libraries have the usual advantages of being extremely well tested, documented and stable.
Bundles are generally used for passing data between various Android activities. It depends on you what type of values you want to pass, but bundles can hold all types of values and pass them to the new activity.
You can use it like this:
Intent intent = new...
Intent(getApplicationContext(), SecondActivity.class);
intent.putExtra("myKey", AnyValue);
startActivity(intent);
You can get the passed values by doing:
Bundle extras = intent.getExtras();
String tmp = extras.getString("myKey");
You can find more info at:
You can also manually tag the column with a contrasts
attribute, which seems to be respected by the regression functions:
contrasts(df$factorcol) <- contr.treatment(levels(df$factorcol),
base=which(levels(df$factorcol) == 'RefLevel'))
You can just share the contact with your bot and, via /getUpdates, you get the "contact" object
Sometimes when we do these steps:
alter table my_table drop constraint my_pk;
alter table my_table add constraint my_pk primary key (city_id, buildtime, time);
The last statement fails with
ORA-00955 "name is already used by an existing object"
Oracle usually creates an unique index with the same name my_pk. In such a case you can drop the unique index or rename it based on whether the constraint is still relevant.
You can combine the dropping of primary key constraint and unique index into a single sql statement:
alter table my_table drop constraint my_pk drop index;
check this: ORA-00955 "name is already used by an existing object"
This code returns a 2d array.
#include <cstdio>
// Returns a pointer to a newly created 2d array the array2D has size [height x width]
int** create2DArray(unsigned height, unsigned width)
{
int** array2D = 0;
array2D = new int*[height];
for (int h = 0; h < height; h++)
{
array2D[h] = new int[width];
for (int w = 0; w < width; w++)
{
// fill in some initial values
// (filling in zeros would be more logic, but this is just for the example)
array2D[h][w] = w + width * h;
}
}
return array2D;
}
int main()
{
printf("Creating a 2D array2D\n");
printf("\n");
int height = 15;
int width = 10;
int** my2DArray = create2DArray(height, width);
printf("Array sized [%i,%i] created.\n\n", height, width);
// print contents of the array2D
printf("Array contents: \n");
for (int h = 0; h < height; h++)
{
for (int w = 0; w < width; w++)
{
printf("%i,", my2DArray[h][w]);
}
printf("\n");
}
// important: clean up memory
printf("\n");
printf("Cleaning up memory...\n");
for ( h = 0; h < height; h++)
{
delete [] my2DArray[h];
}
delete [] my2DArray;
my2DArray = 0;
printf("Ready.\n");
return 0;
}
another approach is to use the double colons:
mtcars %>%
dplyr::group_by(cyl, gear) %>%
dplyr::summarise(length(gear))
herein a simple way to count 0 or more arguments of VA_ARGS, my exemple assumes a maximum of 5 variables, but you can add more if you want.
#define VA_ARGS_NUM_PRIV(P1, P2, P3, P4, P5, P6, Pn, ...) Pn
#define VA_ARGS_NUM(...) VA_ARGS_NUM_PRIV(-1, ##__VA_ARGS__, 5, 4, 3, 2, 1, 0)
VA_ARGS_NUM() ==> 0
VA_ARGS_NUM(19) ==> 1
VA_ARGS_NUM(9, 10) ==> 2
...
Perhaps your subquery (SELECT ename FROM EMP WHERE empno = mgr)
thinks, give me the employee records that are their own managers! (i.e., where the empno of a row is the same as the mgr of the same row.)
have you considered perhaps rewriting this to use an inner (self) join? (I'm asking, becuase i'm not even sure if the following will work or not.)
SELECT t1.ename, t1.empno, t2.ename as MANAGER, t1.mgr
from emp as t1
inner join emp t2 ON t1.mgr = t2.empno
order by t1.empno;
What is Angular CLI Budgets? Budgets is one of the less known features of the Angular CLI. It’s a rather small but a very neat feature!
As applications grow in functionality, they also grow in size. Budgets is a feature in the Angular CLI which allows you to set budget thresholds in your configuration to ensure parts of your application stay within boundaries which you set — Official Documentation
Or in other words, we can describe our Angular application as a set of compiled JavaScript files called bundles which are produced by the build process. Angular budgets allows us to configure expected sizes of these bundles. More so, we can configure thresholds for conditions when we want to receive a warning or even fail build with an error if the bundle size gets too out of control!
How To Define A Budget? Angular budgets are defined in the angular.json file. Budgets are defined per project which makes sense because every app in a workspace has different needs.
Thinking pragmatically, it only makes sense to define budgets for the production builds. Prod build creates bundles with “true size” after applying all optimizations like tree-shaking and code minimization.
Oops, a build error! The maximum bundle size was exceeded. This is a great signal that tells us that something went wrong…
First Approach: Are your files gzipped?
Generally speaking, gzipped file has only about 20% the size of the original file, which can drastically decrease the initial load time of your app. To check if you have gzipped your files, just open the network tab of developer console. In the “Response Headers”, if you should see “Content-Encoding: gzip”, you are good to go.
How to gzip? If you host your Angular app in most of the cloud platforms or CDN, you should not worry about this issue as they probably have handled this for you. However, if you have your own server (such as NodeJS + expressJS) serving your Angular app, definitely check if the files are gzipped. The following is an example to gzip your static assets in a NodeJS + expressJS app. You can hardly imagine this dead simple middleware “compression” would reduce your bundle size from 2.21MB to 495.13KB.
const compression = require('compression')
const express = require('express')
const app = express()
app.use(compression())
Second Approach:: Analyze your Angular bundle
If your bundle size does get too big you may want to analyze your bundle because you may have used an inappropriate large-sized third party package or you forgot to remove some package if you are not using it anymore. Webpack has an amazing feature to give us a visual idea of the composition of a webpack bundle.
It’s super easy to get this graph.
npm install -g webpack-bundle-analyzer
ng build --stats-json
(don’t use flag --prod
). By enabling --stats-json
you will get an additional file stats.jsonwebpack-bundle-analyzer ./dist/stats.json
and your browser will pop up the page at localhost:8888. Have fun with it.ref 1: How Did Angular CLI Budgets Save My Day And How They Can Save Yours
You can use %x
or %X
or %p
; all of them are correct.
%x
, the address is given as lowercase, for example: a3bfbc4
%X
, the address is given as uppercase, for example: A3BFBC4
Both of these are correct.
If you use %x
or %X
it's considering six positions for the address, and if you use %p
it's considering eight positions for the address. For example:
I have slightly modified the jangorecki function for the case where we may have a variety of values that cannot be converted to a number. In my function, a template search is performed and if the template is not found, FALSE is returned.! before gperl, it means that we need those vector elements that do not match the template. The rest is similar to the as.num
function. Example:
as.num.pattern <- function(x, pattern){
stopifnot(is.character(x))
na = !grepl(pattern, x)
x[na] = -Inf
x = as.numeric(x)
x[na] = NA_real_
x
}
as.num.pattern(c('1', '2', '3.43', 'char1', 'test2', 'other3', '23/40', '23, 54 cm.'))
[1] 1.00 2.00 3.43 NA NA NA NA NA
Statements before could change the state of our Python program: create or update variables, define function, etc.
And expressions just return some value can't change the global state or local state in a function.
But now we got :=
, it's an alien!
Inside of a for-loop block, you can access some special variables including loop.index
--but no loop.counter
. From the official docs:
Variable Description
loop.index The current iteration of the loop. (1 indexed)
loop.index0 The current iteration of the loop. (0 indexed)
loop.revindex The number of iterations from the end of the loop (1 indexed)
loop.revindex0 The number of iterations from the end of the loop (0 indexed)
loop.first True if first iteration.
loop.last True if last iteration.
loop.length The number of items in the sequence.
loop.cycle A helper function to cycle between a list of sequences. See the explanation below.
loop.depth Indicates how deep in a recursive loop the rendering currently is. Starts at level 1
loop.depth0 Indicates how deep in a recursive loop the rendering currently is. Starts at level 0
loop.previtem The item from the previous iteration of the loop. Undefined during the first iteration.
loop.nextitem The item from the following iteration of the loop. Undefined during the last iteration.
loop.changed(*val) True if previously called with a different value (or not called at all).
My comments on Renaud Bompuis's answer messed up.
Actually, you can use late binding, and the reference to the 11.0 object library is not required.
The following code will work without any references:
Dim f As Object
Set f = Application.FileDialog(3)
f.AllowMultiSelect = True
f.Show
MsgBox "file choosen = " & f.SelectedItems.Count
Note that the above works well in the runtime also.
Try this way,
public static boolean isInteger(double number){
return Math.ceil(number) == Math.floor(number);
}
for example:
Math.ceil(12.9) = 13; Math.floor(12.9) = 12;
hence 12.9 is not integer, nevertheless
Math.ceil(12.0) = 12; Math.floor(12.0) =12;
hence 12.0 is integer
Use the array list which is actually implement array. It takes initially array of size 4 and when it gets full, a new array is created with its double size and the data of first array get copied into second array, now the new item is inserted into new array. Also the name of second array creates an alias of first so that it can be accessed by the same name as previous and the first array gets disposed
To set a default value to a column, try this:
ALTER TABLE tb_TableName
ALTER COLUMN Record_Status SET DEFAULT 'default value'
Here's a list of decompilers as of Feb 2015:
Procyon, open-source, https://bitbucket.org/mstrobel/procyon/wiki/Java%20Decompiler
CFR, free, no source-code available, http://www.benf.org/other/cfr/
JD, free for non-commercial use only, http://jd.benow.ca/
Fernflower, open-source, https://github.com/fesh0r/fernflower,
JAD – given here only for historical reason. Free, no source-code available, http://varaneckas.com/jad/ Outdated, unsupported and does not decompile correctly Java 5 and later.
You may test above-mentioned decompilers online, no installation required and make your own educated choice.
Java decompilers in the cloud: http://www.javadecompilers.com/
Since nobody provided this code yet:
SELECT TOP @limit f1, f2, f3...
FROM t1
WHERE c1 = v1, c2 > v2...
AND
t1.id NOT IN
(SELECT TOP @offset id
FROM t1
WHERE c1 = v1, c2 > v2...
ORDER BY o1, o2...)
ORDER BY o1, o2...
Important points:
@limit
can be replaced with number of results to retrieve,@offset
is number of results to skipwhere
and order by
clauses, and will provide incorrect results if they are out of syncorder by
is there explicitly if that's what's needed For the Python IDLE 3.8.1 you can restart the Shell
CTRL + F6
On the menu Click on the Shell menu. Then click on the Restart Shell option.
What about:
char *string = "qwerty";
char *e = string;
int idx = 0;
while (*e++ != 'e') idx++;
copying to e to preserve the original string, I suppose if you don't care you could just operate over *string
My full example is here, but I will provide a summary below.
Layout
Add a .swift and .xib file each with the same name to your project. The .xib file contains your custom view layout (using auto layout constraints preferably).
Make the swift file the xib file's owner.
Add the following code to the .swift file and hook up the outlets and actions from the .xib file.
import UIKit
class ResuableCustomView: UIView {
let nibName = "ReusableCustomView"
var contentView: UIView?
@IBOutlet weak var label: UILabel!
@IBAction func buttonTap(_ sender: UIButton) {
label.text = "Hi"
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
guard let view = loadViewFromNib() else { return }
view.frame = self.bounds
self.addSubview(view)
contentView = view
}
func loadViewFromNib() -> UIView? {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: nibName, bundle: bundle)
return nib.instantiate(withOwner: self, options: nil).first as? UIView
}
}
Use it
Use your custom view anywhere in your storyboard. Just add a UIView
and set the class name to your custom class name.
For a while Christopher Swasey's approach was the best approach I had found. I asked a couple of the senior devs on my team about it and one of them had the perfect solution! It satisfies every one of the concerns that Christopher Swasey so eloquently addressed and it doesn't require boilerplate subclass code(my main concern with his approach). There is one gotcha, but other than that it is fairly intuitive and easy to implement.
MyCustomClass.swift
MyCustomClass.xib
File's Owner
of the .xib file to be your custom class (MyCustomClass
)class
value (under the identity Inspector
) for your custom view in the .xib file blank. So your custom view will have no specified class, but it will have a specified File's Owner.Assistant Editor
.
Connections Inspector
you will notice that your Referencing Outlets do not reference your custom class (i.e. MyCustomClass
), but rather reference File's Owner
. Since File's Owner
is specified to be your custom class, the outlets will hook up and work propery. NibLoadable
protocol referenced below.
.swift
file name is different from your .xib
file name, then set the nibName
property to be the name of your .xib
file.required init?(coder aDecoder: NSCoder)
and override init(frame: CGRect)
to call setupFromNib()
like the example below.MyCustomClass
).Here is the protocol you will want to reference:
public protocol NibLoadable {
static var nibName: String { get }
}
public extension NibLoadable where Self: UIView {
public static var nibName: String {
return String(describing: Self.self) // defaults to the name of the class implementing this protocol.
}
public static var nib: UINib {
let bundle = Bundle(for: Self.self)
return UINib(nibName: Self.nibName, bundle: bundle)
}
func setupFromNib() {
guard let view = Self.nib.instantiate(withOwner: self, options: nil).first as? UIView else { fatalError("Error loading \(self) from nib") }
addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
view.leadingAnchor.constraint(equalTo: self.safeAreaLayoutGuide.leadingAnchor, constant: 0).isActive = true
view.topAnchor.constraint(equalTo: self.safeAreaLayoutGuide.topAnchor, constant: 0).isActive = true
view.trailingAnchor.constraint(equalTo: self.safeAreaLayoutGuide.trailingAnchor, constant: 0).isActive = true
view.bottomAnchor.constraint(equalTo: self.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true
}
}
And here is an example of MyCustomClass
that implements the protocol (with the .xib file being named MyCustomClass.xib
):
@IBDesignable
class MyCustomClass: UIView, NibLoadable {
@IBOutlet weak var myLabel: UILabel!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setupFromNib()
}
override init(frame: CGRect) {
super.init(frame: frame)
setupFromNib()
}
}
NOTE: If you miss the Gotcha and set the class
value inside your .xib file to be your custom class, then it will not draw in the storyboard and you will get a EXC_BAD_ACCESS
error when you run the app because it gets stuck in an infinite loop of trying to initialize the class from the nib using the init?(coder aDecoder: NSCoder)
method which then calls Self.nib.instantiate
and calls the init
again.
If you want to know whether if debugging, everywhere in program. Use this.
Declare global variable.
bool isDebug=false;
Create function for checking debug mode
[ConditionalAttribute("DEBUG")]
public static void isDebugging()
{
isDebug = true;
}
In the initialize method call the function
isDebugging();
Now in the entire program. You can check for debugging and do the operations. Hope this Helps!
Try this:
<?php
# Init the MySQL Connection
if( !( $db = mysql_connect( 'localhost' , 'root' , '' ) ) )
die( 'Failed to connect to MySQL Database Server - #'.mysql_errno().': '.mysql_error();
if( !mysql_select_db( 'ram' ) )
die( 'Connected to Server, but Failed to Connect to Database - #'.mysql_errno().': '.mysql_error();
# Prepare the INSERT Query
$insertTPL = 'INSERT INTO `name` VALUES( "%s" , "%s" , "%s" , "%s" )';
$insertSQL = sprintf( $insertTPL ,
mysql_real_escape_string( $name ) ,
mysql_real_escape_string( $add1 ) ,
mysql_real_escape_string( $add2 ) ,
mysql_real_escape_string( $mail ) );
# Execute the INSERT Query
if( !( $insertRes = mysql_query( $insertSQL ) ) ){
echo '<p>Insert of Row into Database Failed - #'.mysql_errno().': '.mysql_error().'</p>';
}else{
echo '<p>Person\'s Information Inserted</p>'
}
# Prepare the SELECT Query
$selectSQL = 'SELECT * FROM `names`';
# Execute the SELECT Query
if( !( $selectRes = mysql_query( $selectSQL ) ) ){
echo 'Retrieval of data from Database Failed - #'.mysql_errno().': '.mysql_error();
}else{
?>
<table border="2">
<thead>
<tr>
<th>Name</th>
<th>Address Line 1</th>
<th>Address Line 2</th>
<th>Email Id</th>
</tr>
</thead>
<tbody>
<?php
if( mysql_num_rows( $selectRes )==0 ){
echo '<tr><td colspan="4">No Rows Returned</td></tr>';
}else{
while( $row = mysql_fetch_assoc( $selectRes ) ){
echo "<tr><td>{$row['name']}</td><td>{$row['addr1']}</td><td>{$row['addr2']}</td><td>{$row['mail']}</td></tr>\n";
}
}
?>
</tbody>
</table>
<?php
}
?>
Your initial solution did not show any obvious santisation of the values before passing them into the Database. This is how SQL Injection attacks (or even un-intentional errors being passed through SQL) occur. Don't do it!
Your database does not seem to have a Primary Key. Whilst these are not, technically, necessary in all usage, they are a good practice, and make for a much more reliable way of referring to a specific row in a table, whether for adding related tables, or for making changes within that table.
You need to check every action, at every stage, for errors. Most PHP functions are nice enough to have a response they will return under an error condition. It is your job to check for those conditions as you go - never assume that PHP will do what you expect, how you expect, and in the order you expect. This is how accident happen...
My provided code above contains alot of points where, if an error has occured, a message will be returned. Try it, see if any error messages are reported, look at the Error Message, and, if applicable, the Error Code returned and do some research.
Good luck.
Try this
$('.slidingDiv').toggle("slide", {direction: "right" }, 1000);
i found out the best way to refresh your Fragment when data change
if you have a button "search", you have to initialize your ARRAY list inside the button
mSearchBtn.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
mList = new ArrayList<Node>();
firebaseSearchQuery.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1 : dataSnapshot.getChildren()) {
Node p = dataSnapshot1.getValue(Node .class);
mList.add(p);
}
YourAdapter = new NodeAdapter(getActivity(), mList);
mRecyclerView.setAdapter(YourAdapter );
}
In Python, you can copy the files using
shutil
moduleos
modulesubprocess
moduleimport os
import shutil
import subprocess
shutil
moduleshutil.copyfile
signature
shutil.copyfile(src_file, dest_file, *, follow_symlinks=True)
# example
shutil.copyfile('source.txt', 'destination.txt')
shutil.copy
signature
shutil.copy(src_file, dest_file, *, follow_symlinks=True)
# example
shutil.copy('source.txt', 'destination.txt')
shutil.copy2
signature
shutil.copy2(src_file, dest_file, *, follow_symlinks=True)
# example
shutil.copy2('source.txt', 'destination.txt')
shutil.copyfileobj
signature
shutil.copyfileobj(src_file_object, dest_file_object[, length])
# example
file_src = 'source.txt'
f_src = open(file_src, 'rb')
file_dest = 'destination.txt'
f_dest = open(file_dest, 'wb')
shutil.copyfileobj(f_src, f_dest)
os
moduleos.popen
signature
os.popen(cmd[, mode[, bufsize]])
# example
# In Unix/Linux
os.popen('cp source.txt destination.txt')
# In Windows
os.popen('copy source.txt destination.txt')
os.system
signature
os.system(command)
# In Linux/Unix
os.system('cp source.txt destination.txt')
# In Windows
os.system('copy source.txt destination.txt')
subprocess
modulesubprocess.call
signature
subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False)
# example (WARNING: setting `shell=True` might be a security-risk)
# In Linux/Unix
status = subprocess.call('cp source.txt destination.txt', shell=True)
# In Windows
status = subprocess.call('copy source.txt destination.txt', shell=True)
subprocess.check_output
signature
subprocess.check_output(args, *, stdin=None, stderr=None, shell=False, universal_newlines=False)
# example (WARNING: setting `shell=True` might be a security-risk)
# In Linux/Unix
status = subprocess.check_output('cp source.txt destination.txt', shell=True)
# In Windows
status = subprocess.check_output('copy source.txt destination.txt', shell=True)
You can also try these:
<div>some <span class="blink">text</span> are <span class="blink">blinking</span></div>
<button onclick="startBlink()">blink</button>
<button onclick="stopBlink()">no blink</button>
<script>
function startBlink(){
window.blinker = setInterval(function(){
if(window.blink){
$('.blink').css('color','blue');
window.blink=false;
}
else{
$('.blink').css('color','white');
window.blink = true;
}
},500);
}
function stopBlink(){
if(window.blinker) clearInterval(window.blinker);
}
</script>
I just got the same situation, Factory data reset worked well for me.
That code is invalid as you can only pass variables into language constructs. empty()
is a language construct.
You have to do this in two lines:
$result = array_intersect($people, $criminals);
$result = !empty($result);
Improved answer from @shamittomar above to get the meta tags (or the specified one from html source)
Can be improved further... the difference from php's default get_meta_tags is that it works even when there is unicode string
function getMetaTags($html, $name = null)
{
$doc = new DOMDocument();
try {
@$doc->loadHTML($html);
} catch (Exception $e) {
}
$metas = $doc->getElementsByTagName('meta');
$data = [];
for ($i = 0; $i < $metas->length; $i++)
{
$meta = $metas->item($i);
if (!empty($meta->getAttribute('name'))) {
// will ignore repeating meta tags !!
$data[$meta->getAttribute('name')] = $meta->getAttribute('content');
}
}
if (!empty($name)) {
return !empty($data[$name]) ? $data[$name] : false;
}
return $data;
}
Using Python to extract a value from the provided Json
Working sample:-
import json
import sys
//load the data into an element
data={"test1" : "1", "test2" : "2", "test3" : "3"}
//dumps the json object into an element
json_str = json.dumps(data)
//load the json to a string
resp = json.loads(json_str)
//print the resp
print (resp)
//extract an element in the response
print (resp['test1'])
Default sorting is ascending, you need to add the keyword DESC to both your orders:
ORDER BY article_rating DESC, article_time DESC
In Apache, you can add the woff2
mime type via your .htaccess
file as stated by this link.
AddType application/font-woff2 .woff2
In IIS, simply add the following mimeMap
tag into your web.config
file inside the staticContent
tag.
<configuration>
<system.webServer>
<staticContent>
<mimeMap fileExtension=".woff2" mimeType="application/font-woff2" />
Have a look at the ReadAsset.java from API samples that come with the SDK.
try {
InputStream is = getAssets().open("read_asset.txt");
// We guarantee that the available method returns the total
// size of the asset... of course, this does mean that a single
// asset can't be more than 2 gigs.
int size = is.available();
// Read the entire asset into a local byte buffer.
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
// Convert the buffer into a string.
String text = new String(buffer);
// Finally stick the string into the text view.
TextView tv = (TextView)findViewById(R.id.text);
tv.setText(text);
} catch (IOException e) {
// Should never happen!
throw new RuntimeException(e);
}
You can use ObjectMapper
ObjectMapper objectMapper = new ObjectMapper();
ObjectClass object = objectMapper.readValue(data, ObjectClass.class);
Perhaps something that's not been mentioned is that of locality.
A MAC address or time-based ordering (UUID1) can afford increased database performance, since it's less work to sort numbers closer-together than those distributed randomly (UUID4) (see here).
A second related issue, is that using UUID1 can be useful in debugging, even if origin data is lost or not explicitly stored (this is obviously in conflict with the privacy issue mentioned by the OP).
getValue = function (object, key) {
return key.split(".").reduce(function (obj, val) {
return (typeof obj == "undefined" || obj === null || obj === "") ? obj : (_.isString(obj[val]) ? obj[val].trim() : obj[val]);}, object);
};
var obj = {
"a": "test1",
"b": "test2"
};
Function called:
getValue(obj, "a");
You probably had a typo when you first ran it.
evaluating 0.5 % 0.3
returns '0.2' (A double) as expected.
Mindprod has a good overview of how modulus works in Java.
If you're wanting to do this via powershell on windows this worked for me
$env:JPDA_SUSPEND="y"
$env:JPDA_TRANSPORT="dt_socket"
/path/to/tomcat/bin/catalina.bat jpda start
Here is what the MySQL docs say about NOW()
:
Returns the current date and time as a value in
YYYY-MM-DD HH:MM:SS
orYYYYMMDDHHMMSS.uuuuuu
format, depending on whether the function is used in a string or numeric context. The value is expressed in the current time zone.
mysql> SELECT NOW();
-> '2007-12-15 23:50:26'
mysql> SELECT NOW() + 0;
-> 20071215235026.000000
Now, you can certainly reduce your smart date to something less...
SELECT (
date_part('year', NOW())::text
|| date_part('month', NOW())::text
|| date_part('day', NOW())::text
|| date_part('hour', NOW())::text
|| date_part('minute', NOW())::text
|| date_part('second', NOW())::text
)::float8 + foo;
But, that would be a really bad idea, what you need to understand is that times and dates are not stupid unformated numbers, they are their own type with their own set of functions and operators
So the MySQL time essentially lets you treat NOW()
as a dumber type, or it overrides +
to make a presumption that I can't find in the MySQL docs. Eitherway, you probably want to look at the date
and interval
types in pg.
The easiest way is to fire the debugger and check the disassembly window.
/*
If your delimiters are slash-based, escape it:
\/*
*
means "0 or more of the previous repeatable pattern", which can be a single character, a character class or a group.
This Code is Working Fine For me! its for Swift 4.x
let blurEffect = UIBlurEffect(style: .ExtraLight)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = self.view.frame
self.view.insertSubview(blurEffectView, atIndex: 0)
The header <math.h>
is a C std lib header. It defines a lot of stuff in the global namespace. The header <cmath>
is the C++ version of that header. It defines essentially the same stuff in namespace std
. (There are some differences, like that the C++ version comes with overloads of some functions, but that doesn't matter.) The header <cmath.h>
doesn't exist.
Since vendors don't want to maintain two versions of what is essentially the same header, they came up with different possibilities to have only one of them behind the scenes. Often, that's the C header (since a C++ compiler is able to parse that, while the opposite won't work), and the C++ header just includes that and pulls everything into namespace std
. Or there's some macro magic for parsing the same header with or without namespace std
wrapped around it or not. To this add that in some environments it's awkward if headers don't have a file extension (like editors failing to highlight the code etc.). So some vendors would have <cmath>
be a one-liner including some other header with a .h
extension. Or some would map all includes matching <cblah>
to <blah.h>
(which, through macro magic, becomes the C++ header when __cplusplus
is defined, and otherwise becomes the C header) or <cblah.h>
or whatever.
That's the reason why on some platforms including things like <cmath.h>
, which ought not to exist, will initially succeed, although it might make the compiler fail spectacularly later on.
I have no idea which std lib implementation you use. I suppose it's the one that comes with GCC, but this I don't know, so I cannot explain exactly what happened in your case. But it's certainly a mix of one of the above vendor-specific hacks and you including a header you ought not to have included yourself. Maybe it's the one where <cmath>
maps to <cmath.h>
with a specific (set of) macro(s) which you hadn't defined, so that you ended up with both definitions.
Note, however, that this code still ought not to compile:
#include <cmath>
double f(double d)
{
return abs(d);
}
There shouldn't be an abs()
in the global namespace (it's std::abs()
). However, as per the above described implementation tricks, there might well be. Porting such code later (or just trying to compile it with your vendor's next version which doesn't allow this) can be very tedious, so you should keep an eye on this.
You need to run pip install in the command prompt, outside from a python interpreter ! Try to exit python and re try :)
Better result for me:
ls -1 | xargs -L1 -d "\n" CMD
Look the answer to my previous question here
c:\> for %i in (java.exe) do @echo. %~$PATH:i
C:\WINDOWS\system32\java.exe
Something like this?
int[][] pixels = new int[w][h];
for( int i = 0; i < w; i++ )
for( int j = 0; j < h; j++ )
pixels[i][j] = img.getRGB( i, j );
Bootstrapping something fast to chart multiple y-axes sharing an x-axis using @joe-kington's answer:
# d = Pandas Dataframe,
# ys = [ [cols in the same y], [cols in the same y], [cols in the same y], .. ]
def chart(d,ys):
from itertools import cycle
fig, ax = plt.subplots()
axes = [ax]
for y in ys[1:]:
# Twin the x-axis twice to make independent y-axes.
axes.append(ax.twinx())
extra_ys = len(axes[2:])
# Make some space on the right side for the extra y-axes.
if extra_ys>0:
temp = 0.85
if extra_ys<=2:
temp = 0.75
elif extra_ys<=4:
temp = 0.6
if extra_ys>5:
print 'you are being ridiculous'
fig.subplots_adjust(right=temp)
right_additive = (0.98-temp)/float(extra_ys)
# Move the last y-axis spine over to the right by x% of the width of the axes
i = 1.
for ax in axes[2:]:
ax.spines['right'].set_position(('axes', 1.+right_additive*i))
ax.set_frame_on(True)
ax.patch.set_visible(False)
ax.yaxis.set_major_formatter(matplotlib.ticker.OldScalarFormatter())
i +=1.
# To make the border of the right-most axis visible, we need to turn the frame
# on. This hides the other plots, however, so we need to turn its fill off.
cols = []
lines = []
line_styles = cycle(['-','-','-', '--', '-.', ':', '.', ',', 'o', 'v', '^', '<', '>',
'1', '2', '3', '4', 's', 'p', '*', 'h', 'H', '+', 'x', 'D', 'd', '|', '_'])
colors = cycle(matplotlib.rcParams['axes.color_cycle'])
for ax,y in zip(axes,ys):
ls=line_styles.next()
if len(y)==1:
col = y[0]
cols.append(col)
color = colors.next()
lines.append(ax.plot(d[col],linestyle =ls,label = col,color=color))
ax.set_ylabel(col,color=color)
#ax.tick_params(axis='y', colors=color)
ax.spines['right'].set_color(color)
else:
for col in y:
color = colors.next()
lines.append(ax.plot(d[col],linestyle =ls,label = col,color=color))
cols.append(col)
ax.set_ylabel(', '.join(y))
#ax.tick_params(axis='y')
axes[0].set_xlabel(d.index.name)
lns = lines[0]
for l in lines[1:]:
lns +=l
labs = [l.get_label() for l in lns]
axes[0].legend(lns, labs, loc=0)
plt.show()
On a WEC7 project I'm working on, I got a similar error. The file I was serializing in was serialized out from an array of objects, so I figured the XML was fine. Also, I have had this working for a few previous classes, so it was quite a puzzle.
Then I noticed in my earlier work that every class that I was serializing/deserializing had a default constructor. That was missing in my failed case so I added it and and voila... it worked fine.
I seem to remember reading somewhere that this was required. I guess it is.
Not orthodox, but it works for me sometimes; set your comment as another attribute:
<node usefulAttr="foo" comment="Your comment here..."/>
//Your broadcast in service
(function () {
angular.module('appModule').factory('AppService', function ($rootScope, $timeout) {
function refreshData() {
$timeout(function() {
$rootScope.$broadcast('refreshData');
}, 0, true);
}
return {
RefreshData: refreshData
};
}); }());
//Controller Implementation
(function () {
angular.module('appModule').controller('AppController', function ($rootScope, $scope, $timeout, AppService) {
//Removes Listeners before adding them
//This line will solve the problem for multiple broadcast call
$scope.$$listeners['refreshData'] = [];
$scope.$on('refreshData', function() {
$scope.showData();
});
$scope.onSaveDataComplete = function() {
AppService.RefreshData();
};
}); }());
Command-line arguments are passed in the first String[]
parameter to main()
, e.g.
public static void main( String[] args ) {
}
In the example above, args
contains all the command-line arguments.
The short, sweet answer to the question posed is:
public static void main( String[] args ) {
if( args.length > 0 && args[0].equals( "a" ) ) {
// first argument is "a"
} else {
// oh noes!?
}
}
Since some codes gave a wrong result for Edge and Opera, I suggest to try this code:
$popularBrowsers = ["Opera","OPR/", "Edg", "Chrome", "Safari", "Firefox", "MSIE", "Trident"];
$userAgent = $_SERVER['HTTP_USER_AGENT'];
$userBrowser = 'Other less popular browsers';
foreach ($popularBrowsers as $browser) {
if (strpos($userAgent, $browser) !== false) {
$userBrowser = $browser;
break;
}
}
switch ($userBrowser) {
case 'OPR/':
$userBrowser = 'Opera';
break;
case 'MSIE':
$userBrowser = 'Internet Explorer';
break;
case 'Trident':
$userBrowser = 'Internet Explorer';
break;
case 'Edg':
$userBrowser = 'Microsoft Edge';
break;
}
echo "Your browser: " . $userBrowser;
For information about agent strings for different browsers and some similarities in them, please refer to: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent
Usually I use the ===
(triple equals) and __LINE__
, __CLASS__
to locate the error in my code:
$query=mysql_query('SELECT champ FROM table')
or die("SQL Error line ".__LINE__ ." class ".__CLASS__." : ".mysql_error());
mysql_close();
if(mysql_num_rows($query)===0)
{
PERFORM ACTION;
}
else
{
while($r=mysql_fetch_row($query))
{
PERFORM ACTION;
}
}
String reverse(String s) {
int legnth = s.length();
char[] arrayCh = s.toCharArray();
for(int i=0; i< length/2; i++) {
char ch = s.charAt(i);
arrayCh[i] = arrayCh[legnth-1-i];
arrayCh[legnth-1-i] = ch;
}
return new String(arrayCh);
}
The solution I end up using most is based off of Tomas Petricek's answer. I usually want to do something with both the attribute and property.
var props = from p in this.GetType().GetProperties()
let attr = p.GetCustomAttributes(typeof(MyAttribute), true)
where attr.Length == 1
select new { Property = p, Attribute = attr.First() as MyAttribute};
IF NOT EXISTS(select * FROM sys.views where name = 'data_VVVV ')
BEGIN
CREATE VIEW data_VVVV AS
SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
END
ELSE
BEGIN
ALTER VIEW data_VVVV AS
SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
END
Winutils.exe is used for running the shell commands for SPARK. When you need to run the Spark without installing Hadoop, you need this file.
Steps are as follows:
Download the winutils.exe from following location for hadoop 2.7.1 https://github.com/steveloughran/winutils/tree/master/hadoop-2.7.1/bin [NOTE: If you are using separate hadoop version then please download the winutils from corresponding hadoop version folder on GITHUB from the location as mentioned above.]
Now, create a folder 'winutils' in C:\ drive. Now create a folder 'bin' inside folder 'winutils' and copy the winutils.exe in that folder. So the location of winutils.exe will be C:\winutils\bin\winutils.exe
Now, open environment variable and set HADOOP_HOME=C:\winutils [NOTE: Please do not add \bin in HADOOP_HOME and no need to set HADOOP_HOME in Path]
Your issue must be resolved !!
I have modified @rahul kumars answer, so that it uses Observables instead:
import { Injectable } from "@angular/core";
import { Observable } from "rxjs/Observable";
import { Observer } from "rxjs/Observer";
@Injectable()
export class ScriptLoaderService {
private scripts: ScriptModel[] = [];
public load(script: ScriptModel): Observable<ScriptModel> {
return new Observable<ScriptModel>((observer: Observer<ScriptModel>) => {
var existingScript = this.scripts.find(s => s.name == script.name);
// Complete if already loaded
if (existingScript && existingScript.loaded) {
observer.next(existingScript);
observer.complete();
}
else {
// Add the script
this.scripts = [...this.scripts, script];
// Load the script
let scriptElement = document.createElement("script");
scriptElement.type = "text/javascript";
scriptElement.src = script.src;
scriptElement.onload = () => {
script.loaded = true;
observer.next(script);
observer.complete();
};
scriptElement.onerror = (error: any) => {
observer.error("Couldn't load script " + script.src);
};
document.getElementsByTagName('body')[0].appendChild(scriptElement);
}
});
}
}
export interface ScriptModel {
name: string,
src: string,
loaded: boolean
}
You need to first create a URI like:
String urlStr = "http://www.example.com/CEREC® Materials & Accessories/IPS Empress® CAD.pdf"
URL url= new URL(urlStr);
URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(), url.getQuery(), url.getRef());
Then convert that Uri to ASCII string:
urlStr=uri.toASCIIString();
Now your url string is completely encoded first we did simple url encoding and then we converted it to ASCII String to make sure no character outside US-ASCII are remaining in string. This is exactly how browsers do.
.toString()
is available, or just add ""
to the end of the int
var x = 3,
toString = x.toString(),
toConcat = x + "";
Angular is simply JavaScript at the core.
12
is a compile-time constant which can not be changed unlike the data referenced by int&
. What you can do is
const int& z = 12;
Javadoc to the rescue :
A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace
nextLine
is probably the method you should use.
How about this deliciously evil implementation?
array.h
#define IMPORT_ARRAY(TYPE) \
\
struct TYPE##Array { \
TYPE* contents; \
size_t size; \
}; \
\
struct TYPE##Array new_##TYPE##Array() { \
struct TYPE##Array a; \
a.contents = NULL; \
a.size = 0; \
return a; \
} \
\
void array_add(struct TYPE##Array* o, TYPE value) { \
TYPE* a = malloc((o->size + 1) * sizeof(TYPE)); \
TYPE i; \
for(i = 0; i < o->size; ++i) { \
a[i] = o->contents[i]; \
} \
++(o->size); \
a[o->size - 1] = value; \
free(o->contents); \
o->contents = a; \
} \
void array_destroy(struct TYPE##Array* o) { \
free(o->contents); \
} \
TYPE* array_begin(struct TYPE##Array* o) { \
return o->contents; \
} \
TYPE* array_end(struct TYPE##Array* o) { \
return o->contents + o->size; \
}
main.c
#include <stdlib.h>
#include "array.h"
IMPORT_ARRAY(int);
struct intArray return_an_array() {
struct intArray a;
a = new_intArray();
array_add(&a, 1);
array_add(&a, 2);
array_add(&a, 3);
return a;
}
int main() {
struct intArray a;
int* it;
int* begin;
int* end;
a = return_an_array();
begin = array_begin(&a);
end = array_end(&a);
for(it = begin; it != end; ++it) {
printf("%d ", *it);
}
array_destroy(&a);
getchar();
return 0;
}
Using jQuery:
$('#Button').click(function(){
$(this).addClass("active");
});
This way, you don't have to pollute your HTML markup with onclick
handlers.
I think I've found a way for UI Tabs without redoing the functionality. So far I haven't found any problems.
$( ".tabs" ).tabs();
$( ".tabs" ).not(".noHash").bind("tabsshow", function(event, ui) {
window.location.hash = "tab_"+ui.tab.hash.replace(/#/,"");
return false;
});
var selectedTabHash = window.location.hash.replace(/tab_/,"");
var index = $( ".tabs li a" ).index($(".tabs li a[href='"+selectedTabHash+"']"));
$( ".tabs" ).not(".noHash").tabs('select', index);
All within a ready event. It prepends "tab_" for the hash but work both when clicked and page loaded with hash.
The mod_authz_host
directives need to be inside a <Location>
or <Directory>
block but I've used the former within <VirtualHost>
like so for Apache 2.2:
<VirtualHost *:8080>
<Location />
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Location>
...
</VirtualHost>
Reference: https://askubuntu.com/questions/262981/how-to-install-mod-authz-host-in-apache
way mentioned by @dirkgently ( v.begin() + index )
nice and fast for vectors
but std::advance
( v.begin(), index )
most generic way and for random access iterators works constant time too.
EDIT
differences in usage:
std::vector<>::iterator it = ( v.begin() + index );
or
std::vector<>::iterator it = v.begin();
std::advance( it, index );
added after @litb notes.
There are a million answers, but here's another one: copy the files into a new package, delete the old package and rename the new package to the old package's name.
Fragment yourFragment = yourviewpageradapter.getItem(int index);
index
is the place of fragment in adapter like you added fragment1
first so retreive fragment1
pass index
as 0 and so on for rest
One the upper left in Google Code it has a link "Checkout"
Click that and you will get a command line suggestion:
Command-line access
Use this command to anonymously check out the latest project source code:
Non-members may check out a read-only working copy anonymously over HTTP.
svn checkout http://yourfolder.googlecode.com/svn/trunk/ yourfolder-read-only
If you want a subfolder only then add it after trunk
If you are on linux & have SVN installed just CD to the folder where you want it installed first then run the above command - it will download fast
I tried all the other suggestions & this is the only thing that worked, couldnt do it with bazaar or svnDownloader app.
The name
of the Series becomes the index
of the row in the DataFrame:
In [99]: df = pd.DataFrame(np.random.randn(8, 4), columns=['A','B','C','D'])
In [100]: s = df.xs(3)
In [101]: s.name = 10
In [102]: df.append(s)
Out[102]:
A B C D
0 -2.083321 -0.153749 0.174436 1.081056
1 -1.026692 1.495850 -0.025245 -0.171046
2 0.072272 1.218376 1.433281 0.747815
3 -0.940552 0.853073 -0.134842 -0.277135
4 0.478302 -0.599752 -0.080577 0.468618
5 2.609004 -1.679299 -1.593016 1.172298
6 -0.201605 0.406925 1.983177 0.012030
7 1.158530 -2.240124 0.851323 -0.240378
10 -0.940552 0.853073 -0.134842 -0.277135
// check if ch is a letter
if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
// ...
// check if ch is a digit
if (ch >= '0' && ch <= '9')
// ...
// check if ch is a whitespace
if ((ch == ' ') || (ch =='\n') || (ch == '\t'))
// ...
Source: https://docs.oracle.com/javase/tutorial/i18n/text/charintro.html
It is true that it is always possible to reverse engineer some code, just like it is impossible to protect a house in order so nobody can ever steal from it. That does not keep me from locking the door, though. Actually, I am not in the java world, I use BitHelmet for .net.
This is extension to answers above, if your xml has namespace defined (xmlns
) then you will get a nasty side effect when adding children - xmlns = ""
being added to your new child element.
What you want to do (assuming element you are adding belongs to same namespace as his parent) is to take namespace from parent element parentElement.GetDefaultNamespace()
.
var child = new XElement(parentElement.GetDefaultNamespace()+"Snippet", new XAttribute("Attr1", "42"), new XAttribute("Attr2", "22"));
child.Add(new XAttribute("Attr3", "777"));
parentElement.Add(child);
for parent elements with multiple namespaces you can choose which one to use by changing from parentElement.GetDefaultNamespace()+"Snippet"
to parentElement.GetNamespaceOfPrefix("namespacePrefixThatGoesWithColon")+"Snippet"
e.g
var child = new XElement(parentElement.GetNamespaceOfPrefix("namespacePrefixThatGoesWithColon")+"Snippet", new XAttribute("Attr1", "42"), new XAttribute("Attr2", "22"));
Review the pom.xml
file inside of target/checkout/
. Chances are, the pom.xml
in your trunk or master branch does not have the distributionManagement
tag.
As a one liner using list comprehension and numpy:
[ax.annotate(x[0], (x[1], x[2])) for x in np.array([n,z,y]).T]
setup is ditto to Rutger's answer.
I ran into this exact issue upon a new install of Apache 2.4. After a few hours of googling and testing I finally found out that I also had to allow access to the directory that contains the (non-existent) target of the Alias directive. That is, this worked for me:
# File: /etc/apache2/conf-available/php5-fpm.conf
<IfModule mod_fastcgi.c>
AddHandler php5-fcgi .php
Action php5-fcgi /php5-fcgi
Alias /php5-fcgi /usr/lib/cgi-bin/php5-fcgi
FastCgiExternalServer /usr/lib/cgi-bin/php5-fcgi -socket /var/run/php5-fpm.sock -pass-header Authorization
# NOTE: using '/usr/lib/cgi-bin/php5-cgi' here does not work,
# it doesn't exist in the filesystem!
<Directory /usr/lib/cgi-bin>
Require all granted
</Directory>
</Ifmodule>
The Subversion FAQ covers this, but uses a bunch of confusing undefined terms like REPOS_PATH
without giving any actual examples.
It might take a few tries to get it to work, so save your updated commit message in a file. Unlike with svn-commit.tmp
files, Subversion won’t preserve your typing if there’s a problem.
In your working directory, run
svn propedit -r N --revprop svn:log
to edit the commit message. If that works, great! But it probably won’t, because the svn:log
revision property is unversioned and Subversion by default will stop you from overwriting it, either with the hook script pre-revprop-change
, or an error message that you don’t have such a hook.
To change the hooks, you need access to the filesystem on which the repository is hosted. svn info
will tell you the Repository Root. Suppose it’s ~/svnrepo
.
cd
to ~/svnrepo/hooks
pre-revprop-change
or
pre-revprop-change.bat
script? If so, temporarily comment out the
part of it that aborts if you try to change svn:log
.Otherwise, on
Windows, create a blank file called pre-revprop-change.bat
. Here’s one way to do that:
copy con pre-revprop-change.bat
^Z
Otherwise, on Unix, run
echo '#!/bin/sh' > pre-revprop-change
chmod +x pre-revprop-change
In the working copy, run svn propedit -r N --revprop svn:log
again
~/svnrepo/hooks/svn-revprop-change
(.bat
)Use "read()" instead o fscanf:
ssize_t read(int fildes, void *buf, size_t nbyte);
DESCRIPTION
The read() function shall attempt to read
nbyte
bytes from the file associated with the open file descriptor,fildes
, into the buffer pointed to bybuf
.
Here is an example:
http://cmagical.blogspot.com/2010/01/c-programming-on-unix-implementing-cat.html
Working part from that example:
f=open(argv[1],O_RDONLY);
while ((n=read(f,l,80)) > 0)
write(1,l,n);
An alternate approach is to use getc
/putc
to read/write 1 char at a time. A lot less efficient. A good example: http://www.eskimo.com/~scs/cclass/notes/sx13.html
Sounds like a case for DefaultIfEmpty
(untested code follows):
Dim x = (From y In context.MyTable _
Where y.MyField = value _
Select y.MyCounter).DefaultIfEmpty.Max
I found an answer now. Thanks for your suggestions!
for e in ./*.cutoff.txt; do
if grep -q -E 'COX1|Cu-oxidase' $e
then
echo xyz >$e.match.txt
else
echo
fi
if grep -q -E 'AMO' $e
then
echo abc >$e.match.txt
else
echo
fi; done
Any comments on that? It seems inefficient to grep twice, but it works...
all:
echo ${PATH}
Or change PATH just for one command:
all:
PATH=/my/path:${PATH} cmd
Variant of Tim's one, good only on some implementations of Regex: ^.*?_
var subjectString = "3.04_somename.jpg";
var resultString = Regex.Replace(subjectString,
@"^ # Match start of string
.*? # Lazily match any character, trying to stop when the next condition becomes true
_ # Match the underscore", "", RegexOptions.IgnorePatternWhitespace);
you cannot update ,but i wrote a batch file that removes my plugins and install again so in this case my all plugins are updated automatically, hope this solves your problem
@echo off
for %%a in (
"com.ionic.keyboard"
"com.phonegap.plugins.PushPlugin"
"cordova-instagram-plugin"
"cordova-plugin-camera"
"cordova-plugin-crosswalk-webview"
"cordova-plugin-file"
"cordova-plugin-file-transfer"
) do call cordova plugin rm %%a
for %%b in (
"com.ionic.keyboard"
"com.phonegap.plugins.PushPlugin"
"cordova-instagram-plugin"
"cordova-plugin-camera"
"cordova-plugin-crosswalk-webview"
"cordova-plugin-file"
"cordova-plugin-file-transfer"
) do call cordova plugin add %%b
I built a general-purpose approach to doing various operations on a merge's commits.
Step One: Add an alias to git by editing ~/.gitconfig
:
[alias]
range = "!. ~/.githelpers && run_on_merge_range"
Step Two: In ~/.githelpers
, define a bash function:
run_on_merge_range() {
cmd=$1; shift
commit=$1; shift
range=$(git show $commit | grep Merge: | awk '{print $2 "..." $3}')
echo "git $cmd $range $@"
if [ -z $range ]; then
echo "No merge detected"
exit 1
fi
git $cmd $range $@
}
Step Three: Profit!
git range log <merge SHA> --oneline
git range diff <merge SHA> --reverse -p
git range diff <merge SHA> --name-only
There is probably a LOT of room for improvement here, I just whipped this together to get past an annoying situation. Feel free to mock my bash syntax and/or logic.
This is one example where using prepared statements really saves you some trouble.
In MySQL, in order to insert a null value, you must specify it at INSERT
time or leave the field out which requires additional branching:
INSERT INTO table2 (f1, f2)
VALUES ('String Value', NULL);
However, if you want to insert a value in that field, you must now branch your code to add the single quotes:
INSERT INTO table2 (f1, f2)
VALUES ('String Value', 'String Value');
Prepared statements automatically do that for you. They know the difference between string(0) ""
and null
and write your query appropriately:
$stmt = $mysqli->prepare("INSERT INTO table2 (f1, f2) VALUES (?, ?)");
$stmt->bind_param('ss', $field1, $field2);
$field1 = "String Value";
$field2 = null;
$stmt->execute();
It escapes your fields for you, makes sure that you don't forget to bind a parameter. There is no reason to stay with the mysql
extension. Use mysqli
and it's prepared statements instead. You'll save yourself a world of pain.
I am behind a corporate proxy, so I usually use an intermediate proxy to enable NTLM authentication.
I had hangs problem with npm install when using CNTLM proxy. With NTLM-APS (a similar proxy) the hangs were gone.