As noted in the previous answers somewhere the window.innerHeight variable gets updated properly now on iOS10 when the keyboard appears and since I don't need the support for earlier versions I came up with the following hack that might be a bit easier then the discussed "solutions".
//keep track of the "expected" height
var windowExpectedSize = window.innerHeight;
//update expected height on orientation change
window.addEventListener('orientationchange', function(){
//in case the virtual keyboard is open we close it first by removing focus from the input elements to get the proper "expected" size
if (window.innerHeight != windowExpectedSize){
$("input").blur();
$("div[contentEditable]").blur(); //you might need to add more editables here or you can focus something else and blur it to be sure
setTimeout(function(){
windowExpectedSize = window.innerHeight;
},100);
}else{
windowExpectedSize = window.innerHeight;
}
});
//and update the "expected" height on screen resize - funny thing is that this is still not triggered on iOS when the keyboard appears
window.addEventListener('resize', function(){
$("input").blur(); //as before you can add more blurs here or focus-blur something
windowExpectedSize = window.innerHeight;
});
then you can use:
if (window.innerHeight != windowExpectedSize){ ... }
to check if the keyboard is visible. I've been using it for a while now in my web app and it works well, but (as all of the other solutions) you might find a situation where it fails because the "expected" size is not updated properly or something.
I got this warning because I thought my column contained null strings, but on checking, it contained np.nan!
if df['column'] == '':
Changing my column to empty strings helped :)
var expressionWithoutQuotes = '';
for(var i =0; i<length;i++){
if(expressionDiv.charAt(i) != '"'){
expressionWithoutQuotes += expressionDiv.charAt(i);
}
}
This may work for you.
Just to share, I've developed my own script to do it. Feel free to use it. It generates "SELECT" statements that you can then run on the tables to generate the "INSERT" statements.
select distinct 'SELECT ''INSERT INTO ' + schema_name(ta.schema_id) + '.' + so.name + ' (' + substring(o.list, 1, len(o.list)-1) + ') VALUES ('
+ substring(val.list, 1, len(val.list)-1) + ');'' FROM ' + schema_name(ta.schema_id) + '.' + so.name + ';'
from sys.objects so
join sys.tables ta on ta.object_id=so.object_id
cross apply
(SELECT ' ' +column_name + ', '
from information_schema.columns c
join syscolumns co on co.name=c.COLUMN_NAME and object_name(co.id)=so.name and OBJECT_NAME(co.id)=c.TABLE_NAME and co.id=so.object_id and c.TABLE_SCHEMA=SCHEMA_NAME(so.schema_id)
where table_name = so.name
order by ordinal_position
FOR XML PATH('')) o (list)
cross apply
(SELECT '''+' +case
when data_type = 'uniqueidentifier' THEN 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '])+'''''''' END '
WHEN data_type = 'timestamp' then '''''''''+CONVERT(NVARCHAR(MAX),CONVERT(BINARY(8),[' + COLUMN_NAME + ']),1)+'''''''''
WHEN data_type = 'nvarchar' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+REPLACE([' + COLUMN_NAME + '],'''''''','''''''''''')+'''''''' END'
WHEN data_type = 'varchar' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+REPLACE([' + COLUMN_NAME + '],'''''''','''''''''''')+'''''''' END'
WHEN data_type = 'char' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+REPLACE([' + COLUMN_NAME + '],'''''''','''''''''''')+'''''''' END'
WHEN data_type = 'nchar' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+REPLACE([' + COLUMN_NAME + '],'''''''','''''''''''')+'''''''' END'
when DATA_TYPE='datetime' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '],121)+'''''''' END '
when DATA_TYPE='datetime2' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '],121)+'''''''' END '
when DATA_TYPE='geography' and column_name<>'Shape' then 'ST_GeomFromText(''POINT('+column_name+'.Lat '+column_name+'.Long)'') '
when DATA_TYPE='geography' and column_name='Shape' then '''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '])+'''''''''
when DATA_TYPE='bit' then '''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '])+'''''''''
when DATA_TYPE='xml' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+REPLACE(CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + ']),'''''''','''''''''''')+'''''''' END '
WHEN DATA_TYPE='image' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),CONVERT(VARBINARY(MAX),[' + COLUMN_NAME + ']),1)+'''''''' END '
WHEN DATA_TYPE='varbinary' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '],1)+'''''''' END '
WHEN DATA_TYPE='binary' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '],1)+'''''''' END '
when DATA_TYPE='time' then 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE ''''''''+CONVERT(NVARCHAR(MAX),[' + COLUMN_NAME + '])+'''''''' END '
ELSE 'CASE WHEN [' + column_name+'] IS NULL THEN ''NULL'' ELSE CONVERT(NVARCHAR(MAX),['+column_name+']) END' end
+ '+'', '
from information_schema.columns c
join syscolumns co on co.name=c.COLUMN_NAME and object_name(co.id)=so.name and OBJECT_NAME(co.id)=c.TABLE_NAME and co.id=so.object_id and c.TABLE_SCHEMA=SCHEMA_NAME(so.schema_id)
where table_name = so.name
order by ordinal_position
FOR XML PATH('')) val (list)
where so.type = 'U'
As of Swift 3, several changes have been made to the syntax.
Here is how you would go about creating a basic button as of Swift 3:
let button = UIButton(type: UIButtonType.system) as UIButton
button.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
button.backgroundColor = UIColor.green
button.setTitle("Example Button", for: UIControlState.normal)
self.view.addSubview(button)
Here are the changes that have been made since previous versions of Swift:
let button = UIButton(type: UIButtonType.System) as UIButton
// system no longer capitalised
button.frame = CGRectMake(100, 100, 100, 50)
// CGRectMake has been removed as of Swift 3
button.backgroundColor = UIColor.greenColor()
// greenColor replaced with green
button.setTitle("Example Button", forState: UIControlState.Normal)
// normal is no longer capitalised
self.view.addSubview(button)
This worked for me:
var start = new Date("2020-10-15T00:00:00.000+0000");
//or
start = new date("2020-10-15T00:00:00.000Z");
collection.find({
start_date:{
$gte: start
}
})...etc
_x000D_
If the file that this script lives in is executable, the hash-bang (#!
) tells the operating system what interpreter to use to run the script. In this case it's /bin/sh
, for example.
There's a Wikipedia article about it for more information.
Below is the link which guide in parsing JSON string in android.
http://www.ibm.com/developerworks/xml/library/x-andbene1/?S_TACT=105AGY82&S_CMP=MAVE
Also according to your json string code snippet must be something like this:-
JSONObject mainObject = new JSONObject(yourstring);
JSONObject universityObject = mainObject.getJSONObject("university");
JSONString name = universityObject.getString("name");
JSONString url = universityObject.getString("url");
Following is the API reference for JSOnObject: https://developer.android.com/reference/org/json/JSONObject.html#getString(java.lang.String)
Same for other object.
try it it is working fine
<%:Html.ActionLink("Details","Details","Product", new {id=item.dateID },null)%>
You may use Json.Net framework to do this. Just like this :
Account account = JsonConvert.DeserializeObject<Account>(json);
the home page : http://json.codeplex.com/
the document about this : http://james.newtonking.com/json/help/index.html#
Add a new class named as "Helper" and change the property of the class to "public static"
public static class Helper
{
public static List<T> DataTableToList<T>(this DataTable table) where T : class, new()
{
try
{
List<T> list = new List<T>();
foreach (var row in table.AsEnumerable())
{
T obj = new T();
foreach (var prop in obj.GetType().GetProperties())
{
try
{
PropertyInfo propertyInfo = obj.GetType().GetProperty(prop.Name);
propertyInfo.SetValue(obj, Convert.ChangeType(row[prop.Name], propertyInfo.PropertyType), null);
}
catch
{
continue;
}
}
list.Add(obj);
}
return list;
}
catch
{
return null;
}
}
}
and access this class in your code behind as like below
DataTable dtt = dsCallList.Tables[0];
List<CallAssignment> lstCallAssignement = dtt.DataTableToList<CallAssignment>();
You can format the jquery date with this line:
moment($(elem).datepicker('getDate')).format("YYYY-MM-DD");
The above answers regarding @JsonProperty
and CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES
are 100% accurate, although some people (like me) might be trying to do this inside a Spring MVC application with code-based configuration. Here's sample code (that I have inside Beans.java
) to achieve the desired effect:
@Bean
public ObjectMapper jacksonObjectMapper() {
return new ObjectMapper().setPropertyNamingStrategy(
PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES);
}
You could use the INDIRECT function. This takes a string and converts it into a range
More info here
=INDIRECT("K"&A2)
But it's preferable to use INDEX as it is less volatile.
=INDEX(K:K,A2)
This returns a value or the reference to a value from within a table or range
More info here
Put either function into cell B2 and fill down.
I know this is an old question, but this solution has not been mentioned yet, hopefully it may help someone even today, after 8 years.
So, what about wrapping a wrapper? Let's assume one cannot change the decorator neither decorate those methods in init (they may be @property decorated or whatever). There is always a possibility to create custom, class-specific decorator that will capture self and subsequently call the original decorator, passing runtime attribute to it.
Here is a working example (f-strings require python 3.6):
import functools
# imagine this is at some different place and cannot be changed
def check_authorization(some_attr, url):
def decorator(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
print(f"checking authorization for '{url}'...")
return func(*args, **kwargs)
return wrapper
return decorator
# another dummy function to make the example work
def do_work():
print("work is done...")
###################
# wrapped wrapper #
###################
def custom_check_authorization(some_attr):
def decorator(func):
# assuming this will be used only on this particular class
@functools.wraps(func)
def wrapper(self, *args, **kwargs):
# get url
url = self.url
# decorate function with original decorator, pass url
return check_authorization(some_attr, url)(func)(self, *args, **kwargs)
return wrapper
return decorator
#############################
# original example, updated #
#############################
class Client(object):
def __init__(self, url):
self.url = url
@custom_check_authorization("some_attr")
def get(self):
do_work()
# create object
client = Client(r"https://stackoverflow.com/questions/11731136/class-method-decorator-with-self-arguments")
# call decorated function
client.get()
output:
checking authorisation for 'https://stackoverflow.com/questions/11731136/class-method-decorator-with-self-arguments'...
work is done...
Hope this will help to someone. Works fine in Angular 6 with reactive forms. Can operate by keyboard too.
dropdown.component.html
<div class="dropdown-wrapper {{className}} {{isFocused ? 'focus':''}}" [ngClass]="{'is-open':isOpen, 'disabled':isReadOnly}" *ngIf="options" (contextmenu)="$event.stopPropagation();">
<div class="box" (click)="toggle($event)">
<ng-container>
<div class="dropdown-selected" *ngIf="isSelectedValue" l10nTranslate><span>{{options[selected]}}</span></div>
<div class="dropdown-selected" *ngIf="!isSelectedValue" l10nTranslate><span>{{placeholder}}</span></div>
</ng-container>
</div>
<ul class="dropdown-options" *ngIf="options">
<li *ngIf="placeholder" (click)="$event.stopPropagation()">{{placeholder}}</li>
<ng-container>
<li id="li{{i}}"
*ngFor="let option of options; let i = index"
[class.active]="selected === i"
(click)="optionSelect(option, i, $event)"
l10nTranslate
>
{{option}}
</li>
</ng-container>
</ul>
</div>
dropdown.component.scss
@import "../../../assets/scss/variables";
// DROPDOWN STYLES
.dropdown-wrapper {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
border: 1px solid #DDDDDD;
border-radius: 3px;
cursor: pointer;
position: relative;
&.focus{
border: 1px solid #a8a8a8;
}
.box {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
width: 100%;
}
// SELECTED
.dropdown-selected {
height: 30px;
position: relative;
padding: 10px 30px 10px 10px;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
width: 100%;
font-size: 12px;
color: #666666;
overflow: hidden;
background-color: #fff;
&::before {
content: "";
position: absolute;
top: 50%;
right: 5px;
-webkit-transform: translateY(-50%);
transform: translateY(-50%);
width: 22px;
height: 22px;
background: url('/assets/i/dropdown-open-selector.svg');
background-size: 22px 22px;
}
span {
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
}
// DROPDOWN OPTIONS
.dropdown-options {
display: none;
position: absolute;
padding: 8px 6px 9px 5px;
max-height: 261px;
overflow-y: auto;
z-index: 999;
li {
padding: 10px 25px 10px 10px;
font-size: $regular-font-size;
color: $content-text-black;
position: relative;
line-height: 10px;
&:last-child {
border-bottom: none;
}
&:hover {
background-color: #245A88;
border-radius: 3px;
color: #fff;
border-bottom-color: transparent;
}
&:focus{
background-color: #245A88;
border-radius: 3px;
color: #fff;
}
&.active {
background-color: #245A88;
border-radius: 3px;
color: #fff;
border-bottom-color: transparent;
}
&:hover {
background-color: #7898B3
}
&.active {
font-weight: 600;
}
}
}
&.is-open {
.dropdown-selected {
&::before {
content: "";
position: absolute;
top: 50%;
right: 5px;
-webkit-transform: translateY(-50%);
transform: translateY(-50%);
width: 22px;
height: 22px;
background: url('/assets/i/dropdown-close-selector.svg');
background-size: 22px 22px;
}
}
.dropdown-options {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-orient: vertical;
-webkit-box-direction: normal;
-ms-flex-direction: column;
flex-direction: column;
width: 100%;
top: 32px;
border-radius: 3px;
background-color: #ffffff;
border: 1px solid #DDDDDD;
-webkit-box-shadow: 0px 3px 11px 0 rgba(1, 2, 2, 0.14);
box-shadow: 0px 3px 11px 0 rgba(1, 2, 2, 0.14);
}
}
&.data-input-fields {
.box {
height: 35px;
}
}
&.send-email-table-select {
min-width: 140px;
border: none;
}
&.persoanal-settings {
width: 80px;
}
}
div.dropdown-wrapper.disabled
{
pointer-events: none;
background-color: #F1F1F1;
opacity: 0.7;
}
dropdown.component.ts
import { Component, OnInit, Input, Output, EventEmitter, HostListener, forwardRef } from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
const noop = () => {
};
export const CUSTOM_INPUT_CONTROL_VALUE_ACCESSOR: any = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => DropdownComponent),
multi: true
};
@Component({
selector: 'app-dropdown',
templateUrl: './dropdown.component.html',
styleUrls: ['./dropdown.component.scss'],
providers: [CUSTOM_INPUT_CONTROL_VALUE_ACCESSOR]
})
export class DropdownComponent implements OnInit, ControlValueAccessor {
@Input() options: Array<string>;
@Input() selected: number;
@Input() className: string;
@Input() placeholder: string;
@Input() isReadOnly = false;
@Output() optSelect = new EventEmitter();
isOpen = false;
selectedOption;
private onTouchedCallback: () => void = noop;
private onChangeCallback: (_: any) => void = noop;
isSelectedValue: boolean;
key: string;
isFocused: boolean;
/**
*Creates an instance of DropdownComponent.
* @memberof DropdownComponent
*/
ngOnInit() {
// Place default value in dropdown
if (this.selected) {
this.placeholder = '';
this.isOpen = false;
}
}
@HostListener('focus')
focusHandler() {
this.selected = 0;
this.isFocused = true;
}
@HostListener('focusout')
focusOutHandler() {
this.isFocused = false;
}
@HostListener('document:keydown', ['$event'])
keyPressHandle(event: KeyboardEvent) {
if (this.isFocused) {
this.key = event.code;
switch (this.key) {
case 'Space':
this.isOpen = true;
break;
case 'ArrowDown':
if (this.options.length - 1 > this.selected) {
this.selected = this.selected + 1;
}
break;
case 'ArrowUp':
if (this.selected > 0) {
this.selected = this.selected - 1;
}
break;
case 'Enter':
if (this.selected > 0) {
this.isSelectedValue = true;
this.isOpen = false;
this.onChangeCallback(this.selected);
this.optSelect.emit(this.options[this.selected]);
}
break;
}
}
}
/**
* option selection
* @param {string} selectedOption - text
* @param {number} idx - current index of item
* @param {any} event - object
*/
optionSelect(selectedOption: string, idx, e: any) {
e.stopPropagation();
this.selected = idx;
this.isSelectedValue = true;
// this.placeholder = '';
this.isOpen = false;
this.onChangeCallback(this.selected);
this.optSelect.emit(selectedOption);
}
/**
* toggle the dropdown
* @param {any} event object
*/
toggle(e: any) {
e.stopPropagation();
// close all previously opened dropdowns, before open
const allElems = document.querySelectorAll('.dropdown-wrapper');
for (let i = 0; i < allElems.length; i++) {
allElems[i].classList.remove('is-open');
}
this.isOpen = !this.isOpen;
if (this.selected >= 0) {
document.querySelector('#li' + this.selected).scrollIntoView(true);
}
}
/**
* dropdown click on outside
*/
@HostListener('document: click', ['$event'])
onClick() {
this.isOpen = false;
}
/**
* Method implemented from ControlValueAccessor and set default selected value
* @param {*} obj
* @memberof DropdownComponent
*/
writeValue(obj: any): void {
if (obj && obj !== '') {
this.isSelectedValue = true;
this.selected = obj;
} else {
this.isSelectedValue = false;
}
}
// From ControlValueAccessor interface
registerOnChange(fn: any) {
this.onChangeCallback = fn;
}
// From ControlValueAccessor interface
registerOnTouched(fn: any) {
this.onTouchedCallback = fn;
}
setDisabledState?(isDisabled: boolean): void {
}
}
Usage
<app-dropdown formControlName="type" [options]="types" [placeholder]="captureData.type" [isReadOnly]="isReadOnly">
</app-dropdown>
Options must bind an array as follows. It can change based on the requirement.
types= [
{
"id": "1",
"value": "Type 1"
},
{
"id": "2",
"value": "Type 2"
},
{
"id": "3",
"value": "Type 3"
}]
You can convert your RDD
to a DataFrame
then show()
it.
// For implicit conversion from RDD to DataFrame
import spark.implicits._
fruits = sc.parallelize([("apple", 1), ("banana", 2), ("orange", 17)])
// convert to DF then show it
fruits.toDF().show()
This will show the top 20 lines of your data, so the size of your data should not be an issue.
+------+---+
| _1| _2|
+------+---+
| apple| 1|
|banana| 2|
|orange| 17|
+------+---+
I'd do:
not any((x[i] != x[i+1] for i in range(0, len(x)-1)))
as any
stops searching the iterable as soon as it finds a True
condition.
UPDATE
This answer was submitted when Angular 2 was still in alpha and many of the features were unavailable / undocumented. While the below will still work, this method is now entirely outdated. I strongly recommend the accepted answer over the below.
Original Answer
Yes in fact it is, however you will want to make sure that it is scoped correctly. For this I've used a property to ensure that this
means what I want it to.
@Component({
...
template: '<child [myCallback]="theBoundCallback"></child>',
directives: [ChildComponent]
})
export class ParentComponent{
public theBoundCallback: Function;
public ngOnInit(){
this.theBoundCallback = this.theCallback.bind(this);
}
public theCallback(){
...
}
}
@Component({...})
export class ChildComponent{
//This will be bound to the ParentComponent.theCallback
@Input()
public myCallback: Function;
...
}
As there is no implementation of a variable it can't be abstract ;)
In case someone want's to do this with a cronjob, please keep in mind that this:
find .session/ -atime +7 -exec rm {} \;
is really slow, when having a lot of files.
Consider using this instead:
find .session/ -atime +7 | xargs -r rm
In Case you have spaces in you file names use this:
find .session/ -atime +7 -print0 | xargs -0 -r rm
xargs
will fill up the commandline with files to be deleted, then run the rm
command a lot lesser than -exec rm {} \;
, which will call the rm
command for each file.
Just my two cents
Using a simple example:
var letters = ["a", "b", "c", "d"];
var letters_02 = letters.slice(0, 2);
console.log(letters_02)
Output: ["a", "b"]
var letters_12 = letters.slice(1, 2);
console.log(letters_12)
Output: ["b"]
Note: slice
provides only a shallow copy and DOES NOT modify the original array.
We can Access SuperClass members using super keyword
If your method overrides one of its superclass's methods, you can invoke the overridden method through the use of the keyword super
. You can also use super to refer to a hidden field (although hiding fields is discouraged). Consider this class, Superclass:
public class Superclass {
public void printMethod() {
System.out.println("Printed in Superclass.");
}
}
// Here is a subclass, called Subclass, that overrides printMethod()
:
public class Subclass extends Superclass {
// overrides printMethod in Superclass
public void printMethod() {
super.printMethod();
System.out.println("Printed in Subclass");
}
public static void main(String[] args) {
Subclass s = new Subclass();
s.printMethod();
}
}
Within Subclass, the simple name printMethod()
refers to the one declared in Subclass, which overrides the one in Superclass. So, to refer to printMethod()
inherited from Superclass, Subclass must use a qualified name, using super as shown. Compiling and executing Subclass prints the following:
Printed in Superclass.
Printed in Subclass
For any one still looking; here's another way of implementing a custom lambda comparer.
public class LambdaComparer<T> : IEqualityComparer<T>
{
private readonly Func<T, T, bool> _expression;
public LambdaComparer(Func<T, T, bool> lambda)
{
_expression = lambda;
}
public bool Equals(T x, T y)
{
return _expression(x, y);
}
public int GetHashCode(T obj)
{
/*
If you just return 0 for the hash the Equals comparer will kick in.
The underlying evaluation checks the hash and then short circuits the evaluation if it is false.
Otherwise, it checks the Equals. If you force the hash to be true (by assuming 0 for both objects),
you will always fall through to the Equals check which is what we are always going for.
*/
return 0;
}
}
you can then create an extension for the linq Distinct that can take in lambda's
public static IEnumerable<T> Distinct<T>(this IEnumerable<T> list, Func<T, T, bool> lambda)
{
return list.Distinct(new LambdaComparer<T>(lambda));
}
Usage:
var availableItems = list.Distinct((p, p1) => p.Id== p1.Id);
You may not be able to color Window's cmd prompt
, but it should work in many unix (or unix-like) terminals.
Also, note that some terminals simply won't support some (if any) ANSI escape sequences and, especially, 24-bit colors.
Please refer to the section Curses at the bottom for the best solution. For a personal or easy solution (although not as cross-platform solution), refer to the ANSI Escape Sequences section.
java: System.out.println((char)27 + "[31m" + "ERROR MESSAGE IN RED");
python: print(chr(27) + "[31m" + "ERROR MESSAGE IN RED")
printf '\x1b[31mERROR MESSAGE IN RED'
printf '\e[31mERROR MESSAGE IN RED'
printf '
CTRL+V,CTRL+[[31mERROR MESSAGE IN RED'
^[
. Although it looks like two characters, it is really just one, the ESC character.While it is not the best way to do it, the easiest way to do this in a programming or scripting language is to use escape sequences. From that link:
An escape sequence is a series of characters used to change the state of computers and their attached peripheral devices. These are also known as control sequences, reflecting their use in device control.
However, it gets even easier than that in video text terminals, as these terminals use ANSI escape sequences. From that link:
ANSI escape sequences are a standard for in-band signaling to control the cursor location, color, and other options on video text terminals. Certain sequences of bytes, most starting with Esc and '[', are embedded into the text, which the terminal looks for and interprets as commands, not as character codes.
27
/ hex: 0x1B
).Some programming langauges (like Java) will not interpret \e
or \x1b
as the ESC character. However, we know that the ASCII character 27
is the ESC character, so we can simply typecast 27
to a char
and use that to begin the escape sequence.
Here are some ways to do it in common programming languages:
Java
System.out.println((char)27 + "[33mYELLOW");
Python 3
print(chr(27) + "[34mBLUE");
print("\x1b[35mMAGENTA");
\x1b
is interpretted correctly in pythonNode JS
console.log(String.fromCharCode(27) + "[36mCYAN");
console.log("\x1b[30;47mBLACK_ON_WHITE");
\x1b
also works in nodeIf you are working with bash or zsh, it is quite easy to color the output (in most terminals). In Linux, Os X, and in some Window's terminals, you can check to see if your terminal supports color by doing both of the following:
printf '\e[31mRED'
printf '\x1b[31mRED'
If you see color for both, then that's great! If you see color for only one, then use that sequence. If you do not see color for either of them, then double check to make sure you typed everything correctly and that you are in bash or zsh; if you still do not see any color, then your terminal probably does not support ANSI escape sequences.
If I recall correctly, linux terminals tend to support both \e
and \x1b
escape sequences, while os x terminals only tend to support \e
, but I may be wrong. Nonetheless, if you see something like the following image, then you're all set! (Note that I am using the shell, zsh, and it is coloring my prompt string; also, I am using urxvt as my terminal in linux.)
"How does this work?" you might ask. Bascially, printf
is interpretting the sequence of characters that follows (everything inside of the single-quotes). When printf
encounters \e
or \x1b
, it will convert these characters to the ESC character (ASCII: 27). That's just what we want. Now, printf
sends ESC31m
, and since there is an ESC followed by a valid ANSI escape sequence, we should get colored output (so long as it is supported by the terminal).
You can also use echo -e '\e[32mGREEN'
(for example), to color output. Note that the -e
flag for echo
"[enables] interpretation of backslash escapes" and must be used if you want echo
to appropriately interpret the escape sequence.
ANSI escape sequences can do more than just color output, but let's start with that, and see exactly how color works; then, we will see how to manipulate the cursor; finally, we'll take a look and see how to use 8-bit color and also 24-bit color (although it only has tenuous support).
On Wikipedia, they refer to ESC[ as CSI
, so I will do the same.
To color output using ANSI escapes, use the following:
CSI
n
m
CSI
: escape character—^[[
or ESC[n
: a number—one of the following:
30
-37
, 39
: foreground40
-47
, 49
: backgroundm
: a literal ASCII m
—terminates the escape sequenceI will use bash or zsh to demonstrate all of the possible color combinations. Plop the following in bash or zsh to see for yourself (You may need to replace \e
with \x1b
):
for fg in {30..37} 39; do for bg in {40..47} 49; do printf "\e[${fg};${bg}m~TEST~"; done; printf "\n"; done;
Result:
+~~~~~~+~~~~~~+~~~~~~~~~~~+
| fg | bg | color |
+~~~~~~+~~~~~~+~~~~~~~~~~~+
| 30 | 40 | black |
| 31 | 41 | red |
| 32 | 42 | green |
| 33 | 43 | yellow |
| 34 | 44 | blue |
| 35 | 45 | magenta |
| 36 | 46 | cyan |
| 37 | 47 | white |
| 39 | 49 | default |
+~~~~~~+~~~~~~+~~~~~~~~~~~+
SGR just allows you to change the text. Many of these do not work in certain terminals, so use these sparingly in production-level projects. However, they can be useful for making program output more readable or helping you distinguish between different types of output.
Color actually falls under SGR, so the syntax is the same:
CSI
n
m
CSI
: escape character—^[[
or ESC[n
: a number—one of the following:
0
: reset1
-9
: turns on various text effects21
-29
: turns off various text effects (less supported than 1
-9
)30
-37
, 39
: foreground color40
-47
, 49
: background color38
: 8- or 24-bit foreground color (see 8/24-bit Color below)48
: 8- or 24-bit background color (see 8/24-bit Color below)m
: a literal ASCII m
—terminates the escape sequenceAlthough there is only tenuous support for faint (2), italic (3), underline (4), blinking (5,6), reverse video (7), conceal (8), and crossed out (9), some (but rarely all) tend to work on linux and os x terminals.
It's also worthwhile to note that you can separate any of the above attributes with a semi-colon. For example printf '\e[34;47;1;3mCRAZY TEXT\n'
will show CRAZY TEXT
with a blue foreground
on a white background
, and it will be bold
and italic
.
Eg:
Plop the following in your bash or zsh shell to see all of the text effects you can do. (You may need to replace \e
with \x1b
.)
for i in {1..9}; do printf "\e[${i}m~TEST~\e[0m "; done
Result:
You can see that my terminal supports all of the text effects except for faint (2), conceal (8) and cross out (9).
+~~~~~+~~~~~~~~~~~~~~~~~~+
| n | effect |
+~~~~~+~~~~~~~~~~~~~~~~~~+
| 0 | reset |
| 1 | bold |
| 2 | faint* |
| 3 | italic** |
| 4 | underline |
| 5 | slow blink |
| 6 | rapid blink* |
| 7 | inverse |
| 8 | conceal* |
| 9 | strikethrough* |
+~~~~~+~~~~~~~~~~~~~~~~~~+
* not widely supported
** not widely supported and sometimes treated as inverse
While most terminals support this, it is less supported than 0-7
,9
colors.
Syntax:
CSI
38;5;
n
m
CSI
: escape character—^[[
or ESC[38;5;
: literal string that denotes use of 8-bit colors for foregroundn
: a number—one of the following:
0
-255
If you want to preview all of the colors in your terminal in a nice way, I have a nice script on gist.github.com.
It looks like this:
If you want to change the background using 8-bit colors, just replace the 38
with a 48
:
CSI
48;5;
n
m
CSI
: escape character—^[[
or ESC[48;5;
: literal string that denotes use of 8-bit colors for backgroundn
: a number—one of the following:
0
-255
Also known as true color, 24-bit color provides some really cool functionality. Support for this is definitely growing (as far as I know it works in most modern terminals except urxvt, my terminal [insert angry emoji]).
24-bit color is actually supported in vim (see the vim wiki to see how to enable 24-bit colors). It's really neat because it pulls from the colorscheme defined for gvim; eg, it uses the fg/bg from highlight guibg=#______ guifg=#______
for the 24-bit colors! Neato, huh?
Here is how 24-bit color works:
CSI
38;2;
r
;
g
;
b
m
CSI
: escape character—^[[
or ESC[38;2;
: literal string that denotes use of 24-bit colors for foregroundr
,g
,b
: numbers—each should be 0
-255
To test just a few of the many colors you can have ((2^8)^3
or 2^24
or 16777216
possibilites, I think), you can use this in bash or zsh:
for r in 0 127 255; do for g in 0 127 255; do for b in 0 127 255; do printf "\e[38;2;${r};${g};${b}m($r,$g,$b)\e[0m "; done; printf "\n"; done; done;
Result (this is in gnome-terminal since urxvt DOES NOT SUPPORT 24-bit color ... get it together, urxvt maintainer ... for real):
If you want 24-bit colors for the background ... you guessed it! You just replace 38
with 48
:
CSI
48;2;
r
;
g
;
b
m
CSI
: escape character—^[[
or ESC[48;2;
: literal string that denotes use of 24-bit colors for backgroundr
,g
,b
: numbers—each should be 0
-255
Sometimes \e
and \x1b
will not work. For example, in the sh shell, sometimes neither works (although it does on my system now, I don't think it used to).
To circumvent this, you can use CTRL+V,CTRL+[ or CTRLV,ESC
This will insert a "raw" ESC character (ASCII: 27). It will look like this ^[
, but do not fret; it is only one character—not two.
Eg:
Refer to the Curses (Programming Library) page for a full reference on curses. It should be noted that curses only works on unix and unix-like operating systems.
I won't go into too much detail, for search engines can reveal links to websites that can explain this much better than I can, but I'll discuss it briefly here and give an example.
If you read the above text, you might recall that \e
or \x1b
will sometimes work with printf
. Well, sometimes \e
and \x1b
will not work at all (this is not standard and I have never worked with a terminal like this, but it is possible). More importantly, more complex escape sequences (think Home and other multi-character keys) are difficult to support for every terminal (unless you are willing to spend a lot of time and effort parsing terminfo and termcap and and figuring out how to handle every terminal).
Curses solves this problem. Basically, it is able to understand what capabilities a terminal has, using these methods (as described by the wikipedia article linked above):
Most implementations of curses use a database that can describe the capabilities of thousands of different terminals. There are a few implementations, such as PDCurses, which use specialized device drivers rather than a terminal database. Most implementations use terminfo; some use termcap. Curses has the advantage of back-portability to character-cell terminals and simplicity. For an application that does not require bit-mapped graphics or multiple fonts, an interface implementation using curses will usually be much simpler and faster than one using an X toolkit.
Most of the time, curses will poll terminfo and will then be able to understand how to manipulate the cursor and text attributes. Then, you, the programmer, use the API provided by curses to manipulate the cursor or change the text color or other attributes if the functionality you seek is desired.
I find python is really easy to use, but if you want to use curses in a different programming language, then simply search it on duckduckgo or any other search engine. :) Here is a quick example in python 3:
import curses
def main(stdscr):
# allow curses to use default foreground/background (39/49)
curses.use_default_colors()
# Clear screen
stdscr.clear()
curses.init_pair(1, curses.COLOR_RED, -1)
curses.init_pair(2, curses.COLOR_GREEN, -1)
stdscr.addstr("ERROR: I like tacos, but I don't have any.\n", curses.color_pair(1))
stdscr.addstr("SUCCESS: I found some tacos.\n", curses.color_pair(2))
stdscr.refresh() # make sure screen is refreshed
stdscr.getkey() # wait for user to press key
if __name__ == '__main__':
curses.wrapper(main)
result:
You might think to yourself that this is a much more round-about way of doing things, but it really is much more cross-platform (really cross-terminal … at least in the unix- and unix-like-platform world). For colors, it is not quite as important, but when it comes to supporting other multi-sequence escape sequences (such as Home, End, Page Up, Page Down, etc), then curses becomes all the more important.
tput
is a command line utility for manipulating cursor and texttput
comes with the curses
package. If you want to use cross-terminal (ish) applications in the terminal, you should use tput, as it parses terminfo or whatever it needs to and uses a set of standardized commands (like curses) and returns the correct escape sequence.echo "$(tput setaf 1)$(tput bold)ERROR:$(tput sgr0)$(tput setaf 1) My tacos have gone missing"
echo "$(tput setaf 2)$(tput bold)SUCCESS:$(tput sgr0)$(tput setaf 2) Oh good\! I found my tacos\!"
Result:
why not to take advantage of modern browsers css transition and make things simpler and fast using more css and less jquery
Here is the code for sliding up and down
Here is the code for sliding left to right
Similarly we can change the sliding from top to bottom or right to left by changing transform-origin and transform: scaleX(0) or transform: scaleY(0) appropriately.
If you want to ensure keyboard events are fired, consider using sendKeys(CharSequence)
.
Example 1:
from selenium.webdriver.common.keys import Keys
# ...
webElement.sendKeys(Keys.CONTROL + "a");
webElement.sendKeys(Keys.DELETE);
Example 2:
from selenium.webdriver.common.keys import Keys
# ...
webElement.sendKeys(Keys.BACK_SPACE); //do repeatedly, e.g. in while loop
There are many ways to get the required WebElement, e.g.:
webElement.clear();
If this element is a text entry element, this will clear the value.
Note that the events fired by this event may not be as you'd expect. In particular, we don't fire any keyboard or mouse events.
You can delete any QuerySet you'd like. For example, to delete all blog posts with some Post model
Post.objects.all().delete()
and to delete any Post with a future publication date
Post.objects.filter(pub_date__gt=datetime.now()).delete()
You do, however, need to come up with a way to narrow down your QuerySet. If you just want a view to delete a particular object, look into the delete generic view.
EDIT:
Sorry for the misunderstanding. I think the answer is somewhere between. To implement your own, combine ModelForm
s and generic views. Otherwise, look into 3rd party apps that provide similar functionality. In a related question, the recommendation was django-filter.
A write-up of jme's suggestion, using pathlib, in Python 3.
from pathlib import Path
parent = Path(r'/a/b')
son = Path(r'/a/b/c/d')
?
if parent in son.parents or parent==son:
print(son.relative_to(parent)) # returns Path object equivalent to 'c/d'
Just a VB.NET version of the answer:
Private Function GetRequestIpAddress() As IPAddress
Dim serverVariables = HttpContext.Current.Request.ServerVariables
Dim headersKeysToCheck = {"HTTP_CLIENT_IP", _
"HTTP_X_FORWARDED_FOR", _
"HTTP_X_FORWARDED", _
"HTTP_X_CLUSTER_CLIENT_IP", _
"HTTP_FORWARDED_FOR", _
"HTTP_FORWARDED", _
"REMOTE_ADDR"}
For Each thisHeaderKey In headersKeysToCheck
Dim thisValue = serverVariables.Item(thisHeaderKey)
If thisValue IsNot Nothing Then
Dim validAddress As IPAddress = Nothing
If IPAddress.TryParse(thisValue, validAddress) Then
Return validAddress
End If
End If
Next
Return Nothing
End Function
out has gotten a new more succint syntax in C#7 https://docs.microsoft.com/en-us/dotnet/articles/csharp/whats-new/csharp-7#more-expression-bodied-members and even more exciting is the C#7 tuple enhancements that are a more elegant choice than using ref and out IMHO.
In large this question has been answered but in small parts by everyone. I dealt with this just a minute ago.
I wanted to have a button tray at the bottom of a panel where the panel has 30px all around. The button tray had to be flush bottom and sides.
.panel
{
padding: 30px;
}
.panel > .actions
{
margin: -30px;
margin-top: 30px;
padding: 30px;
width: auto;
}
I did a demo here with more flesh to drive the idea. However the key elements above are offset any parent padding with matching negative margins on the child. Then most critical if you want to run the child full-width then set width to auto. (as mentioned in a comment above by schlingel).
java: Java application executor which is associated with a console to display output/errors
javaw: (Java windowed) application executor not associated with console. So no display of output/errors. It can be used to silently push the output/errors to text files. It is mostly used to launch GUI-based applications.
javaws: (Java web start) to download and run the distributed web applications. Again, no console is associated.
All are part of JRE and use the same JVM.
When you return something from a then()
callback, it's a bit magic. If you return a value, the next then()
is called with that value. However, if you return something promise-like, the next then()
waits on it, and is only called when that promise settles (succeeds/fails).
Source: https://web.dev/promises/#queuing-asynchronous-actions
The other solutions here all have caveats (though they address the question at hand). If you are (1) looping over mixed-types or (2) want a generic solution that you can export as a function or include in your utilities, none of the other solutions here will work.
The simplest and most self-explanatory solution is:
// simplest, most-readable
if (is_bool($res) {
$res = $res ? 'true' : 'false';
}
// same as above but written more tersely
$res = is_bool($res) ? ($res ? 'true' : 'false') : $res;
// Terser still, but completely unnecessary function call and must be
// commented due to poor readability. What is var_export? What is its
// second arg? Why are we exporting stuff?
$res = is_bool($res) ? var_export($res, 1) : $res;
But most developers reading your code will require a trip to http://php.net/var_export to understand what the var_export
does and what the second param is.
var_export
Works for boolean
input but converts everything else to a string
as well.
// OK
var_export(false, 1); // 'false'
// OK
var_export(true, 1); // 'true'
// NOT OK
var_export('', 1); // '\'\''
// NOT OK
var_export(1, 1); // '1'
($res) ? 'true' : 'false';
Works for boolean input but converts everything else (ints, strings) to true/false.
// OK
true ? 'true' : 'false' // 'true'
// OK
false ? 'true' : 'false' // 'false'
// NOT OK
'' ? 'true' : 'false' // 'false'
// NOT OK
0 ? 'true' : 'false' // 'false'
json_encode()
Same issues as var_export
and probably worse since json_encode
cannot know if the string true
was intended a string or a boolean.
You can just pass a list of the two points you want to connect to plt.plot
. To make this easily expandable to as many points as you want, you could define a function like so.
import matplotlib.pyplot as plt
x=[-1 ,0.5 ,1,-0.5]
y=[ 0.5, 1, -0.5, -1]
plt.plot(x,y, 'ro')
def connectpoints(x,y,p1,p2):
x1, x2 = x[p1], x[p2]
y1, y2 = y[p1], y[p2]
plt.plot([x1,x2],[y1,y2],'k-')
connectpoints(x,y,0,1)
connectpoints(x,y,2,3)
plt.axis('equal')
plt.show()
Note, that function is a general function that can connect any two points in your list together.
To expand this to 2N points, assuming you always connect point i
to point i+1
, we can just put it in a for loop:
import numpy as np
for i in np.arange(0,len(x),2):
connectpoints(x,y,i,i+1)
In that case of always connecting point i
to point i+1
, you could simply do:
for i in np.arange(0,len(x),2):
plt.plot(x[i:i+2],y[i:i+2],'k-')
You can use this regex to get the yyyy-MM-dd format:
((?:19|20)\\d\\d)-(0?[1-9]|1[012])-([12][0-9]|3[01]|0?[1-9])
You can find example for date validation: How to validate date with regular expression.
Use word: using
. A good habit of programming.
using (TcpClient tcpClient = new TcpClient())
{
//operations
tcpClient.Close();
}
Use css @keyframes
.elementToFadeInAndOut {
opacity: 1;
animation: fade 2s linear;
}
@keyframes fade {
0%,100% { opacity: 0 }
50% { opacity: 1 }
}
here is a DEMO
.elementToFadeInAndOut {_x000D_
width:200px;_x000D_
height: 200px;_x000D_
background: red;_x000D_
-webkit-animation: fadeinout 4s linear forwards;_x000D_
animation: fadeinout 4s linear forwards;_x000D_
}_x000D_
_x000D_
@-webkit-keyframes fadeinout {_x000D_
0%,100% { opacity: 0; }_x000D_
50% { opacity: 1; }_x000D_
}_x000D_
_x000D_
@keyframes fadeinout {_x000D_
0%,100% { opacity: 0; }_x000D_
50% { opacity: 1; }_x000D_
}
_x000D_
<div class=elementToFadeInAndOut></div>
_x000D_
Reading: Using CSS animations
You can clean the code by doing this:
.elementToFadeInAndOut {_x000D_
width:200px;_x000D_
height: 200px;_x000D_
background: red;_x000D_
-webkit-animation: fadeinout 4s linear forwards;_x000D_
animation: fadeinout 4s linear forwards;_x000D_
opacity: 0;_x000D_
}_x000D_
_x000D_
@-webkit-keyframes fadeinout {_x000D_
50% { opacity: 1; }_x000D_
}_x000D_
_x000D_
@keyframes fadeinout {_x000D_
50% { opacity: 1; }_x000D_
}
_x000D_
<div class=elementToFadeInAndOut></div>
_x000D_
Identifying the column is easy:
SELECT *
FROM ( SELECT id,
time
FROM dbo.a
UNION
SELECT id,
time
FROM dbo.b
)
GROUP BY id
But it doesn't solve the main problem of this query: what's to be done with the second column values upon grouping by the first? Since (peculiarly!) you're using UNION
rather than UNION ALL
, you won't have entirely duplicated rows between the two subtables in the union, but you may still very well have several values of time for one value of the id, and you give no hint of what you want to do - min, max, avg, sum, or what?! The SQL engine should give an error because of that (though some such as mysql just pick a random-ish value out of the several, I believe sql-server is better than that).
So, for example, change the first line to SELECT id, MAX(time)
or the like!
Private Sub main()
'replace "J2" with the cell you want to insert the drop down list
With Range("J2").Validation
.Delete
'replace "=A1:A6" with the range the data is in.
.Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, _
Operator:=xlBetween, Formula1:="=Sheet1!A1:A6"
.IgnoreBlank = True
.InCellDropdown = True
.InputTitle = ""
.ErrorTitle = ""
.InputMessage = ""
.ErrorMessage = ""
.ShowInput = True
.ShowError = True
End With
End Sub
I don't use named parameters for all queries. For example it is unusual to use named parameters in JpaRepository.
To workaround I use JPQL CONCAT function (this code emulate start with):
@Repository
public interface BranchRepository extends JpaRepository<Branch, String> {
private static final String QUERY = "select b from Branch b"
+ " left join b.filial f"
+ " where f.id = ?1 and b.id like CONCAT(?2, '%')";
@Query(QUERY)
List<Branch> findByFilialAndBranchLike(String filialId, String branchCode);
}
I found this technique in excellent docs: http://openjpa.apache.org/builds/1.0.1/apache-openjpa-1.0.1/docs/manual/jpa_overview_query.html
Another alternative using library(purrr)
(that seems to be a bit quicker on large data.frames)
flatten(by_row(xy.df, ..f = function(x) flatten_chr(x), .labels = FALSE))
@Column
is not the appropriate annotation. You don't want to store a whole User or Question in a column. You want to create an association between the entities. Start by renaming Questions
to Question
, since an instance represents a single question, and not several ones. Then create the association:
@Entity
@Table(name = "UserAnswer")
public class UserAnswer {
// this entity needs an ID:
@Id
@Column(name="useranswer_id")
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@ManyToOne
@JoinColumn(name = "user_id")
private User user;
@ManyToOne
@JoinColumn(name = "question_id")
private Question question;
@Column(name = "response")
private String response;
//getter and setter
}
The Hibernate documentation explains that. Read it. And also read the javadoc of the annotations.
I tried sudo apt install nginx-full. You will get all the required packages.
@Override
public boolean onTouch(View v, MotionEvent event) {
float x = event.getX();
float y = event.getY();
return true;
}
firstly you have to change the drive, which is allocated to your usb.
follow these step to access your pendrive using CMD. 1- type drivename follow by the colon just like k: 2- type dir it will show all the files and directory in your usb 3- now you can access any file or directory of your usb.
To enable USB debbuging you have to enable developer option
Now if you have shaded usb debbuging and it is not turning on
Now you can enjoy your sharing ...
With the new ValueTuple
from C# 7 (VS 2017 and above), there is a new solution:
List<(int,string)> mylist= new List<(int,string)>();
Which creates a list of ValueTuple type. If you're targeting .Net Framework 4.7+ or .Net Core, it's native, otherwise you have to get the ValueTuple package from nuget.
It's a struct opposing to Tuple
, which is a class. It also has the advantage over the Tuple
class that you could create a named tuple, like this:
var mylist = new List<(int myInt, string myString)>();
That way you can access like mylist[0].myInt
and mylist[0].myString
For many people working with node.js, a major benefit of bower is for managing dependencies that are not javascript at all. If they are working with languages that compile to javascript, npm can be used to manage some of their dependencies. however, not all their dependencies are going to be node.js modules. Some of those that compile to javascript may have weird source language specific mangling that makes passing them around compiled to javascript an inelegant option when users are expecting source code.
Not everything in an npm package needs to be user-facing javascript, but for npm library packages, at least some of it should be.
it working perfect.
cd /D "%APPDATA%\Mozilla\Firefox\Profiles"
cd *.default
set ffile=%cd%
echo user_pref("network.proxy.ftp", "YOUR_PROXY_SERVER"); >>prefs.js
echo user_pref("network.proxy.ftp_port", YOUR_PROXY_PORT); >>prefs.js
echo user_pref("network.proxy.http", "YOUR_PROXY_SERVER"); >>prefs.js
echo user_pref("network.proxy.http_port", YOUR_PROXY_PORT); >>prefs.js
echo user_pref("network.proxy.share_proxy_settings", true); >>prefs.js
echo user_pref("network.proxy.socks", "YOUR_PROXY_SERVER"); >>prefs.js
echo user_pref("network.proxy.socks_port", YOUR_PROXY_PORT); >>prefs.js
echo user_pref("network.proxy.ssl", "YOUR_PROXY_SERVER"); >>prefs.js
echo user_pref("network.proxy.ssl_port", YOUR_PROXY_PORT); >>prefs.js
echo user_pref("network.proxy.type", 1); >>prefs.js
set ffile=
cd %windir%
if someone is running Eclipse in Ubuntu and have this problem I have found the answer by following these steps:
Yes, __attribute__((packed))
is potentially unsafe on some systems. The symptom probably won't show up on an x86, which just makes the problem more insidious; testing on x86 systems won't reveal the problem. (On the x86, misaligned accesses are handled in hardware; if you dereference an int*
pointer that points to an odd address, it will be a little slower than if it were properly aligned, but you'll get the correct result.)
On some other systems, such as SPARC, attempting to access a misaligned int
object causes a bus error, crashing the program.
There have also been systems where a misaligned access quietly ignores the low-order bits of the address, causing it to access the wrong chunk of memory.
Consider the following program:
#include <stdio.h>
#include <stddef.h>
int main(void)
{
struct foo {
char c;
int x;
} __attribute__((packed));
struct foo arr[2] = { { 'a', 10 }, {'b', 20 } };
int *p0 = &arr[0].x;
int *p1 = &arr[1].x;
printf("sizeof(struct foo) = %d\n", (int)sizeof(struct foo));
printf("offsetof(struct foo, c) = %d\n", (int)offsetof(struct foo, c));
printf("offsetof(struct foo, x) = %d\n", (int)offsetof(struct foo, x));
printf("arr[0].x = %d\n", arr[0].x);
printf("arr[1].x = %d\n", arr[1].x);
printf("p0 = %p\n", (void*)p0);
printf("p1 = %p\n", (void*)p1);
printf("*p0 = %d\n", *p0);
printf("*p1 = %d\n", *p1);
return 0;
}
On x86 Ubuntu with gcc 4.5.2, it produces the following output:
sizeof(struct foo) = 5
offsetof(struct foo, c) = 0
offsetof(struct foo, x) = 1
arr[0].x = 10
arr[1].x = 20
p0 = 0xbffc104f
p1 = 0xbffc1054
*p0 = 10
*p1 = 20
On SPARC Solaris 9 with gcc 4.5.1, it produces the following:
sizeof(struct foo) = 5
offsetof(struct foo, c) = 0
offsetof(struct foo, x) = 1
arr[0].x = 10
arr[1].x = 20
p0 = ffbff317
p1 = ffbff31c
Bus error
In both cases, the program is compiled with no extra options, just gcc packed.c -o packed
.
(A program that uses a single struct rather than array doesn't reliably exhibit the problem, since the compiler can allocate the struct on an odd address so the x
member is properly aligned. With an array of two struct foo
objects, at least one or the other will have a misaligned x
member.)
(In this case, p0
points to a misaligned address, because it points to a packed int
member following a char
member. p1
happens to be correctly aligned, since it points to the same member in the second element of the array, so there are two char
objects preceding it -- and on SPARC Solaris the array arr
appears to be allocated at an address that is even, but not a multiple of 4.)
When referring to the member x
of a struct foo
by name, the compiler knows that x
is potentially misaligned, and will generate additional code to access it correctly.
Once the address of arr[0].x
or arr[1].x
has been stored in a pointer object, neither the compiler nor the running program knows that it points to a misaligned int
object. It just assumes that it's properly aligned, resulting (on some systems) in a bus error or similar other failure.
Fixing this in gcc would, I believe, be impractical. A general solution would require, for each attempt to dereference a pointer to any type with non-trivial alignment requirements either (a) proving at compile time that the pointer doesn't point to a misaligned member of a packed struct, or (b) generating bulkier and slower code that can handle either aligned or misaligned objects.
I've submitted a gcc bug report. As I said, I don't believe it's practical to fix it, but the documentation should mention it (it currently doesn't).
UPDATE: As of 2018-12-20, this bug is marked as FIXED. The patch will appear in gcc 9 with the addition of a new -Waddress-of-packed-member
option, enabled by default.
When address of packed member of struct or union is taken, it may result in an unaligned pointer value. This patch adds -Waddress-of-packed-member to check alignment at pointer assignment and warn unaligned address as well as unaligned pointer
I've just built that version of gcc from source. For the above program, it produces these diagnostics:
c.c: In function ‘main’:
c.c:10:15: warning: taking address of packed member of ‘struct foo’ may result in an unaligned pointer value [-Waddress-of-packed-member]
10 | int *p0 = &arr[0].x;
| ^~~~~~~~~
c.c:11:15: warning: taking address of packed member of ‘struct foo’ may result in an unaligned pointer value [-Waddress-of-packed-member]
11 | int *p1 = &arr[1].x;
| ^~~~~~~~~
Fun 'base_url' snippet!
if (!function_exists('base_url')) {
function base_url($atRoot=FALSE, $atCore=FALSE, $parse=FALSE){
if (isset($_SERVER['HTTP_HOST'])) {
$http = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';
$hostname = $_SERVER['HTTP_HOST'];
$dir = str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);
$core = preg_split('@/@', str_replace($_SERVER['DOCUMENT_ROOT'], '', realpath(dirname(__FILE__))), NULL, PREG_SPLIT_NO_EMPTY);
$core = $core[0];
$tmplt = $atRoot ? ($atCore ? "%s://%s/%s/" : "%s://%s/") : ($atCore ? "%s://%s/%s/" : "%s://%s%s");
$end = $atRoot ? ($atCore ? $core : $hostname) : ($atCore ? $core : $dir);
$base_url = sprintf( $tmplt, $http, $hostname, $end );
}
else $base_url = 'http://localhost/';
if ($parse) {
$base_url = parse_url($base_url);
if (isset($base_url['path'])) if ($base_url['path'] == '/') $base_url['path'] = '';
}
return $base_url;
}
}
Use as simple as:
// url like: http://stackoverflow.com/questions/2820723/how-to-get-base-url-with-php
echo base_url(); // will produce something like: http://stackoverflow.com/questions/2820723/
echo base_url(TRUE); // will produce something like: http://stackoverflow.com/
echo base_url(TRUE, TRUE); || echo base_url(NULL, TRUE); // will produce something like: http://stackoverflow.com/questions/
// and finally
echo base_url(NULL, NULL, TRUE);
// will produce something like:
// array(3) {
// ["scheme"]=>
// string(4) "http"
// ["host"]=>
// string(12) "stackoverflow.com"
// ["path"]=>
// string(35) "/questions/2820723/"
// }
Use gradle dependencies to get the Gson in your project. Your application build.gradle should look like this-
dependencies {
implementation 'com.google.code.gson:gson:2.8.2'
}
Just use the length filter on the whole array. It works on more than just strings:
{{ notcount|length }}
The reason it is throwing that exception is because you have the argument rb
, which opens the file in binary mode. Change that to r
, which will by default open the file in text mode.
Your code:
import csv
ifile = open('sample.csv', "rb")
read = csv.reader(ifile)
for row in read :
print (row)
New code:
import csv
ifile = open('sample.csv', "r")
read = csv.reader(ifile)
for row in read :
print (row)
Try this:
SELECT s.NAME + '.' + t.NAME AS TableName
FROM sys.tables t
INNER JOIN sys.schemas s
ON t.schema_id = s.schema_id
it will display the schema+table name for all tables in the current database.
Here is a version that will list every table in every database on the current server. it allows a search parameter to be used on any part or parts of the server+database+schema+table names:
SET NOCOUNT ON
DECLARE @AllTables table (CompleteTableName nvarchar(4000))
DECLARE @Search nvarchar(4000)
,@SQL nvarchar(4000)
SET @Search=null --all rows
SET @SQL='select @@SERVERNAME+''.''+''?''+''.''+s.name+''.''+t.name from [?].sys.tables t inner join sys.schemas s on t.schema_id=s.schema_id WHERE @@SERVERNAME+''.''+''?''+''.''+s.name+''.''+t.name LIKE ''%'+ISNULL(@SEARCH,'')+'%'''
INSERT INTO @AllTables (CompleteTableName)
EXEC sp_msforeachdb @SQL
SET NOCOUNT OFF
SELECT * FROM @AllTables ORDER BY 1
set @Search to NULL for all tables, set it to things like 'dbo.users' or 'users' or '.master.dbo' or even include wildcards like '.master.%.u', etc.
You can use path
to maneuver.
var MYPATH = '/User/HELLO/WORLD/FILENAME.js';
var MYEXT = '.js';
var fileName = path.basename(MYPATH, MYEXT);
var filePath = path.dirname(MYPATH) + '/' + fileName;
Output
> filePath
'/User/HELLO/WORLD/FILENAME'
> fileName
'FILENAME'
> MYPATH
'/User/HELLO/WORLD/FILENAME.js'
Try getppid()
if you want your C program to print your shell's PID.
SSIS doesn't implicitly convert data types, so you need to do it explicitly. The Excel connection manager can only handle a few data types and it tries to make a best guess based on the first few rows of the file. This is fully documented in the SSIS documentation.
You have several options:
INSERT
into the real destination table using CAST
or CONVERT
to convert the dataYou might also want to note the comments in the Import Wizard documentation about data type mappings.
For me I found the solution after a lot of try which is replacing
HttpClient
with
System.Net.Http.HttpClient
Adding to Justin's answer, if you're worried about untidy markup or you don't want this value hard coded in CSS you can set the input before it is shown. Something like this:
$('input').datepicker({
beforeShow:function(input){
$(input).dialog("widget").css({
"position": "relative",
"z-index": 20
});
}
});
Note that you cannot omit the "position": "relative"
rule, as the plugin either looks in the inline style for both rules or the stylesheet, but not both.
The dialog("widget")
is the actual datepicker that pops up.
For the full list of snippets (little bits of prefabricated code) press Ctrl+K and then Ctrl+X. Source from MSDN. Works in Visual Studio 2013 with a C# project.
So how to make a constructor
Update: You can also right-click in your code where you want the snippet, and select Insert Snippet from the right-click menu
If you just want to remove the first two characters and the last two, then you can use negative indexes on the string:
s = "((String1))"
s = s[2...-2]
p s # => "String1"
If you want to remove all parentheses from the string you can use the delete method on the string class:
s = "((String1))"
s.delete! '()'
p s # => "String1"
Actually, you can do what you want. If you want to provide multiple interfaces or a class plus interfaces, you have to have your wildcard look something like this:
<T extends ClassA & InterfaceB>
See the Generics Tutorial at sun.com, specifically the Bounded Type Parameters section, at the bottom of the page. You can actually list more than one interface if you wish, using & InterfaceName
for each one that you need.
This can get arbitrarily complicated. To demonstrate, see the JavaDoc declaration of Collections#max
, which (wrapped onto two lines) is:
public static <T extends Object & Comparable<? super T>> T
max(Collection<? extends T> coll)
why so complicated? As said in the Java Generics FAQ: To preserve binary compatibility.
It looks like this doesn't work for variable declaration, but it does work when putting a generic boundary on a class. Thus, to do what you want, you may have to jump through a few hoops. But you can do it. You can do something like this, putting a generic boundary on your class and then:
class classB { }
interface interfaceC { }
public class MyClass<T extends classB & interfaceC> {
Class<T> variable;
}
to get variable
that has the restriction that you want. For more information and examples, check out page 3 of Generics in Java 5.0. Note, in <T extends B & C>
, the class name must come first, and interfaces follow. And of course you can only list a single class.
You can use the with_entities()
method to restrict which columns you'd like to return in the result. (documentation)
result = SomeModel.query.with_entities(SomeModel.col1, SomeModel.col2)
Depending on your requirements, you may also find deferreds useful. They allow you to return the full object but restrict the columns that come over the wire.
Spring MockMvc now has direct support for JSON. So you just say:
.andExpect(content().json("{'message':'ok'}"));
and unlike string comparison, it will say something like "missing field xyz" or "message Expected 'ok' got 'nok'.
This method was introduced in Spring 4.1.
In CSS3:
input[type=radio] {content:url(mycheckbox.png)}
input[type=radio]:checked {content:url(mycheckbox-checked.png)}
In reality:
<span class=fakecheckbox><input type=radio><img src="checkbox.png" alt=""></span>
@media screen {.fakecheckbox img {display:none}}
@media print {.fakecheckbox input {display:none;}}
and you'll need Javascript to keep <img>
and radios in sync (and ideally insert them there in a first place).
I've used <img>
, because browsers are usually configured not to print background-image
. It's better to use image than another control, because image is non-interactive and less likely to cause problems.
I would recommend to use css, but php to use to set some class or id for the element, in order to make it generated dynamically.
while true; do foo; sleep 2; done
By the way, if you type it as a multiline (as you are showing) at the command prompt and then call the history with arrow up, you will get it on a single line, correctly punctuated.
$ while true
> do
> echo "hello"
> sleep 2
> done
hello
hello
hello
^C
$ <arrow up> while true; do echo "hello"; sleep 2; done
I have tried to use AjaxableResponseMixin in my project, but had ended up with the following error message:
ImproperlyConfigured: No URL to redirect to. Either provide a url or define a get_absolute_url method on the Model.
That is because the CreateView will return a redirect response instead of returning a HttpResponse when you to send JSON request to the browser. So I have made some changes to the AjaxableResponseMixin
. If the request is an ajax request, it will not call the super.form_valid
method, just call the form.save()
directly.
from django.http import JsonResponse
from django import forms
from django.db import models
class AjaxableResponseMixin(object):
success_return_code = 1
error_return_code = 0
"""
Mixin to add AJAX support to a form.
Must be used with an object-based FormView (e.g. CreateView)
"""
def form_invalid(self, form):
response = super(AjaxableResponseMixin, self).form_invalid(form)
if self.request.is_ajax():
form.errors.update({'result': self.error_return_code})
return JsonResponse(form.errors, status=400)
else:
return response
def form_valid(self, form):
# We make sure to call the parent's form_valid() method because
# it might do some processing (in the case of CreateView, it will
# call form.save() for example).
if self.request.is_ajax():
self.object = form.save()
data = {
'result': self.success_return_code
}
return JsonResponse(data)
else:
response = super(AjaxableResponseMixin, self).form_valid(form)
return response
class Product(models.Model):
name = models.CharField('product name', max_length=255)
class ProductAddForm(forms.ModelForm):
'''
Product add form
'''
class Meta:
model = Product
exclude = ['id']
class PriceUnitAddView(AjaxableResponseMixin, CreateView):
'''
Product add view
'''
model = Product
form_class = ProductAddForm
You can use the jQuery find method
$('select').change(function () {
var optionSelected = $(this).find("option:selected");
var valueSelected = optionSelected.val();
var textSelected = optionSelected.text();
});
The above solution works perfectly but I choose to add the following code for them willing to get the clicked option. It allows you get the selected option even when this select value has not changed. (Tested with Mozilla only)
$('select').find('option').click(function () {
var optionSelected = $(this);
var valueSelected = optionSelected.val();
var textSelected = optionSelected.text();
});
The proper way to do this is to use dispatch_async in the main_queue, as I did in the following code
dispatch_async(dispatch_get_main_queue(), {
(self.delegate as TBGQRCodeViewController).displayQRCode(receiveAddr, withAmountInBTC:amountBTC)
})
It is impossible to detect and/or intercept the HOME button from within an Android app. This is built into the system to prevent malicious apps that cannot be exited.
This is what i ended up doing
//import ../../Constants;
public class RequestFilter implements Filter {
private static final Logger logger = LoggerFactory.getLogger(RequestFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
throws IOException, ServletException {
try {
CustomHttpServletRequest customHttpServletRequest = new CustomHttpServletRequest((HttpServletRequest) servletRequest);
filterChain.doFilter(customHttpServletRequest, servletResponse);
} finally {
//do something here
}
}
@Override
public void destroy() {
}
public static Map<String, String[]> ADMIN_QUERY_PARAMS = new HashMap<String, String[]>() {
{
put("diagnostics", new String[]{"false"});
put("skipCache", new String[]{"false"});
}
};
/*
This is a custom wrapper over the `HttpServletRequestWrapper` which
overrides the various header getter methods and query param getter methods.
Changes to the request pojo are
=> A custom header is added whose value is a unique id
=> Admin query params are set to default values in the url
*/
private class CustomHttpServletRequest extends HttpServletRequestWrapper {
public CustomHttpServletRequest(HttpServletRequest request) {
super(request);
//create custom id (to be returned) when the value for a
//particular header is asked for
internalRequestId = RandomStringUtils.random(10, true, true) + "-local";
}
public String getHeader(String name) {
String value = super.getHeader(name);
if(Strings.isNullOrEmpty(value) && isRequestIdHeaderName(name)) {
value = internalRequestId;
}
return value;
}
private boolean isRequestIdHeaderName(String name) {
return Constants.RID_HEADER.equalsIgnoreCase(name) || Constants.X_REQUEST_ID_HEADER.equalsIgnoreCase(name);
}
public Enumeration<String> getHeaders(String name) {
List<String> values = Collections.list(super.getHeaders(name));
if(values.size()==0 && isRequestIdHeaderName(name)) {
values.add(internalRequestId);
}
return Collections.enumeration(values);
}
public Enumeration<String> getHeaderNames() {
List<String> names = Collections.list(super.getHeaderNames());
names.add(Constants.RID_HEADER);
names.add(Constants.X_REQUEST_ID_HEADER);
return Collections.enumeration(names);
}
public String getParameter(String name) {
if (ADMIN_QUERY_PARAMS.get(name) != null) {
return ADMIN_QUERY_PARAMS.get(name)[0];
}
return super.getParameter(name);
}
public Map<String, String[]> getParameterMap() {
Map<String, String[]> paramsMap = new HashMap<>(super.getParameterMap());
for (String paramName : ADMIN_QUERY_PARAMS.keySet()) {
if (paramsMap.get(paramName) != null) {
paramsMap.put(paramName, ADMIN_QUERY_PARAMS.get(paramName));
}
}
return paramsMap;
}
public String[] getParameterValues(String name) {
if (ADMIN_QUERY_PARAMS.get(name) != null) {
return ADMIN_QUERY_PARAMS.get(name);
}
return super.getParameterValues(name);
}
public String getQueryString() {
Map<String, String[]> map = getParameterMap();
StringBuilder builder = new StringBuilder();
for (String param: map.keySet()) {
for (String value: map.get(param)) {
builder.append(param).append("=").append(value).append("&");
}
}
builder.deleteCharAt(builder.length() - 1);
return builder.toString();
}
}
}
To keep the accordion nature intact when wanting to also use 'hide' and 'show' functions like .collapse( 'hide' )
, you must initialize the collapsible panels with the parent property set in the object with toggle: false
before making any calls to 'hide' or 'show'
// initialize collapsible panels
$('#accordion .collapse').collapse({
toggle: false,
parent: '#accordion'
});
// show panel one (will collapse others in accordion)
$( '#collapseOne' ).collapse( 'show' );
// show panel two (will collapse others in accordion)
$( '#collapseTwo' ).collapse( 'show' );
// hide panel two (will not collapse/expand others in accordion)
$( '#collapseTwo' ).collapse( 'hide' );
import sys
try:
print("stuff")
except:
sys.exit(1) # exiing with a non zero value is better for returning from an error
Did you maybe use some <tab>
instead of spaces?
Try remove all the spaces before the code and readd them using <space>
characters, just to be sure it's not a <tab>
.
Add to app.module.ts
import {MatIconModule} from '@angular/material/icon';
& link in your global index.html.
util.format does this.
It will be part of v0.5.3 and can be used like this:
var uri = util.format('http%s://%s%s',
(useSSL?'s':''), apiBase, path||'/');
If you want to break a string literal onto multiple lines, you can concatenate multiple strings together, one on each line, like so:
printf("name: %s\t"
"args: %s\t"
"value %d\t"
"arraysize %d\n",
sp->name,
sp->args,
sp->value,
sp->arraysize);
My error was that I was also referencing another file in my project, which was also containing a value for the attribute "AssemblyVersion". I removed that attribute from one of the file and it is now working properly.
The key is to make sure that this value is not declared more than once in any file in your project.
The answer is given but think that for some situation this will be also interesting way to get string from NSInteger
NSInteger value = 12;
NSString * string = [NSString stringWithFormat:@"%0.0f", (float)value];
Note: Do not do this in production code, use http instead, or the actual self signed public key as suggested above.
On HttpClient 4.xx:
import static org.junit.Assert.assertEquals;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.junit.Test;
public class HttpClientTrustingAllCertsTest {
@Test
public void shouldAcceptUnsafeCerts() throws Exception {
DefaultHttpClient httpclient = httpClientTrustingAllSSLCerts();
HttpGet httpGet = new HttpGet("https://host_with_self_signed_cert");
HttpResponse response = httpclient.execute( httpGet );
assertEquals("HTTP/1.1 200 OK", response.getStatusLine().toString());
}
private DefaultHttpClient httpClientTrustingAllSSLCerts() throws NoSuchAlgorithmException, KeyManagementException {
DefaultHttpClient httpclient = new DefaultHttpClient();
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, getTrustingManager(), new java.security.SecureRandom());
SSLSocketFactory socketFactory = new SSLSocketFactory(sc);
Scheme sch = new Scheme("https", 443, socketFactory);
httpclient.getConnectionManager().getSchemeRegistry().register(sch);
return httpclient;
}
private TrustManager[] getTrustingManager() {
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
@Override
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkClientTrusted(X509Certificate[] certs, String authType) {
// Do nothing
}
@Override
public void checkServerTrusted(X509Certificate[] certs, String authType) {
// Do nothing
}
} };
return trustAllCerts;
}
}
In Postgres 9.4 or later, this is simplest and fastest:
SELECT c.*
FROM comments c
JOIN unnest('{1,3,2,4}'::int[]) WITH ORDINALITY t(id, ord) USING (id)
ORDER BY t.ord;
WITH ORDINALITY
was introduced with in Postgres 9.4.
No need for a subquery, we can use the set-returning function like a table directly. (A.k.a. "table-function".)
A string literal to hand in the array instead of an ARRAY constructor may be easier to implement with some clients.
For convenience (optionally), copy the column name we are joining to (id
in the example), so we can join with a short USING
clause to only get a single instance of the join column in the result.
Detailed explanation:
You probably want this:
string[,] Tablero = new string[3,3];
This will create you a matrix-like array where all rows have the same length.
The array in your sample is a so-called jagged array, i.e. an array of arrays where the elements can be of different size. A jagged array would have to be created in a different way:
string[][] Tablero = new string[3][];
for (int i = 0; i < Tablero.GetLength(0); i++)
{
Tablero[i] = new string[3];
}
You can also use initializers to fill the array elements with data:
string[,] Tablero = new string[,]
{
{"1.1","1.2", "1.3"},
{"2.1","2.2", "2.3"},
{"3.1", "3.2", "3.3"}
};
And in case of a jagged array:
string[][] Tablero = new string[][]
{
new string[] {"1.1","1.2", "1.3"},
new string[] {"2.1","2.2", "2.3"},
new string[] {"3.1", "3.2", "3.3"}
};
The file system is a tree structure that can be used as a hash map. Your hash table will be a temporary directory, your keys will be filenames, and your values will be file contents. The advantage is that it can handle huge hashmaps, and doesn't require a specific shell.
hashtable=$(mktemp -d)
echo $value > $hashtable/$key
value=$(< $hashtable/$key)
Of course, its slow, but not that slow. I tested it on my machine, with an SSD and btrfs, and it does around 3000 element read/write per second.
This was very helpful. I wanted to import this function to a Postgre SQL database. Thought i would share it with anyone who is interested. Will have them a few hours. Note: this function creates a list of SQL statements that can be copied and executed on the Postgre database. Maybe someone smarter then me can get Postgre to create and execute the statements all in one function.
CREATE OR REPLACE FUNCTION SearchAllTables(_search text) RETURNS TABLE( txt text ) as $funct$
DECLARE __COUNT int;
__SQL text;
BEGIN
EXECUTE 'SELECT COUNT(0) FROM INFORMATION_SCHEMA.COLUMNS
WHERE DATA_TYPE = ''text''
AND table_schema = ''public'' ' INTO __COUNT;
RETURN QUERY
SELECT CASE WHEN ROW_NUMBER() OVER (ORDER BY table_name) < __COUNT THEN
'SELECT ''' || table_name ||'.'|| column_name || ''' AS tbl, "' || column_name || '" AS col FROM "public"."' || "table_name" || '" WHERE "'|| "column_name" || '" ILIKE ''%' || _search || '%'' UNION ALL'
ELSE
'SELECT ''' || table_name ||'.'|| column_name || ''' AS tbl, "' || column_name || '" AS col FROM "public"."' || "table_name" || '" WHERE "'|| "column_name" || '" ILIKE ''%' || _search || '%'''
END AS txt
FROM INFORMATION_SCHEMA.COLUMNS
WHERE DATA_TYPE = 'text'
AND table_schema = 'public';
END
$funct$ LANGUAGE plpgsql;
There is no inherent reason that a simple batch file would run in XP but not Windows 10. It is possible you are referencing a command or a 3rd party utility that no longer exists. To know more about what is actually happening, you will need to do one of the following:
pause
to the batch file so that you can see what is happening before it exits.
.bat
files and select "edit". This will open the file in notepad.pause
.- OR -
.bat
files are located, hold down the "shift" key and right click in the white space.Once you have done this, I recommend creating a new question with the output you see after using one of the methods above.
void main ()
{
int temp,integer,count=0,i,cnd=0;
char ascii[10]={0};
printf("enter a number");
scanf("%d",&integer);
if(integer>>31)
{
/*CONVERTING 2's complement value to normal value*/
integer=~integer+1;
for(temp=integer;temp!=0;temp/=10,count++);
ascii[0]=0x2D;
count++;
cnd=1;
}
else
for(temp=integer;temp!=0;temp/=10,count++);
for(i=count-1,temp=integer;i>=cnd;i--)
{
ascii[i]=(temp%10)+0x30;
temp/=10;
}
printf("\n count =%d ascii=%s ",count,ascii);
}
This is the effect that we're trying to achieve:
The classes that need to be applied changed with the release of Bootstrap 3.1.0 and again with the release of Bootstrap 4. If one of the below solutions doesn't seem to be working double check the version number of Bootstrap that you're importing and try a different one.
You can use the pull-right
class to line the right hand side of the menu up with the caret:
<li class="dropdown">
<a class="dropdown-toggle" href="#">Link</a>
<ul class="dropdown-menu pull-right">
<li>...</li>
</ul>
</li>
Fiddle: http://jsfiddle.net/joeczucha/ewzafdju/
As of v3.1.0, we've deprecated .pull-right on dropdown menus. To right-align a menu, use .dropdown-menu-right. Right-aligned nav components in the navbar use a mixin version of this class to automatically align the menu. To override it, use .dropdown-menu-left.
You can use the dropdown-right
class to line the right hand side of the menu up with the caret:
<li class="dropdown">
<a class="dropdown-toggle" href="#">Link</a>
<ul class="dropdown-menu dropdown-menu-right">
<li>...</li>
</ul>
</li>
Fiddle: http://jsfiddle.net/joeczucha/1nrLafxc/
The class for Bootstrap 4 are the same as Bootstrap > 3.1.0, just watch out as the rest of the surrounding markup has changed a little:
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#">
Link
</a>
<div class="dropdown-menu dropdown-menu-right">
<a class="dropdown-item" href="#">...</a>
</div>
</li>
add anaconda installation path to .bashrc
export PATH="$PATH:/home/username/anaconda3/bin"
load in terminal
$ source ~/.bashrc
run from terminal
$ anaconda-navigator
In my case NDK location was the issue.
go to File->Project Structure->SDK Location
and add NDK location
I'm using the following function for that; it's an adaptation from one of the man entries in the fputscsv comments. And you'll probably want to flatten that array; not sure what happens if you pass in a multi-dimensional one.
/**
* Formats a line (passed as a fields array) as CSV and returns the CSV as a string.
* Adapted from http://us3.php.net/manual/en/function.fputcsv.php#87120
*/
function arrayToCsv( array &$fields, $delimiter = ';', $enclosure = '"', $encloseAll = false, $nullToMysqlNull = false ) {
$delimiter_esc = preg_quote($delimiter, '/');
$enclosure_esc = preg_quote($enclosure, '/');
$output = array();
foreach ( $fields as $field ) {
if ($field === null && $nullToMysqlNull) {
$output[] = 'NULL';
continue;
}
// Enclose fields containing $delimiter, $enclosure or whitespace
if ( $encloseAll || preg_match( "/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field ) ) {
$output[] = $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure;
}
else {
$output[] = $field;
}
}
return implode( $delimiter, $output );
}
file.lines
with JFile package
var JFile=require('jfile');
var myF=new JFile("./data.txt");
myF.lines // ["first line","second line"] ....
Don't forget before :
npm install jfile --save
From the Python PEP 8 -- Style Guide for Python Code:
Descriptive: Naming Styles
The following special forms using leading or trailing underscores are recognized (these can generally be combined with any case convention):
_single_leading_underscore
: weak "internal use" indicator. E.g.from M import *
does not import objects whose name starts with an underscore.
single_trailing_underscore_
: used by convention to avoid conflicts with Python keyword, e.g.
Tkinter.Toplevel(master, class_='ClassName')
__double_leading_underscore
: when naming a class attribute, invokes name mangling (inside class FooBar,__boo
becomes_FooBar__boo
; see below).
__double_leading_and_trailing_underscore__
: "magic" objects or attributes that live in user-controlled namespaces. E.g.__init__
,__import__
or__file__
. Never invent such names; only use them as documented.
Note that names with double leading and trailing underscores are essentially reserved for Python itself: "Never invent such names; only use them as documented".
For those like me who don't need or don't want ADO.NET, those who need to run code closer to SQLite, but still compatible with netstandard
(.net framework, .net core, etc.), I've built a 100% free open source project called SQLNado (for "Not ADO") available on github here:
https://github.com/smourier/SQLNado
It's available as a nuget here https://www.nuget.org/packages/SqlNado but also available as a single .cs file, so it's quite practical to use in any C# project type.
It supports all of SQLite features when using SQL commands, and also supports most of SQLite features through .NET:
ps aux | awk '{print $2, $4, $11}' | sort -k2rn | head -n 10
(Adding -n numeric flag to sort command.)
The reason the first code sample doesn't work is because the layout of the page changed. As per the warning on that page: "The translated string is fetched by the RegEx close to the bottom. This could of course change, and you have to keep it up to date." I think this should work for now, at least until they change the page again.
public string TranslateText(string input, string languagePair)
{
string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair);
WebClient webClient = new WebClient();
webClient.Encoding = System.Text.Encoding.UTF8;
string result = webClient.DownloadString(url);
result = result.Substring(result.IndexOf("<span title=
\"") + "<span title=
\"".Length);
result = result.Substring(result.IndexOf(">") + 1);
result = result.Substring(0, result.IndexOf("</span
>"));
return result.Trim();
}
In short, to do modification on the list while iterating the same list.
list[:] = ["Modify the list" for each_element in list "Condition Check"]
example:
list[:] = [list.remove(each_element) for each_element in list if each_element in ["data1", "data2"]]
Setting Up the database
public class DatabaseHelper extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "database_name";
// Table Names
private static final String DB_TABLE = "table_image";
// column names
private static final String KEY_NAME = "image_name";
private static final String KEY_IMAGE = "image_data";
// Table create statement
private static final String CREATE_TABLE_IMAGE = "CREATE TABLE " + DB_TABLE + "("+
KEY_NAME + " TEXT," +
KEY_IMAGE + " BLOB);";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// creating table
db.execSQL(CREATE_TABLE_IMAGE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// on upgrade drop older tables
db.execSQL("DROP TABLE IF EXISTS " + DB_TABLE);
// create new table
onCreate(db);
}
}
Insert in the Database:
public void addEntry( String name, byte[] image) throws SQLiteException{
SQLiteDatabase database = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(KEY_NAME, name);
cv.put(KEY_IMAGE, image);
database.insert( DB_TABLE, null, cv );
}
Retrieving data:
byte[] image = cursor.getBlob(1);
Note:
Below is an Utility class which I hope could help you:
public class DbBitmapUtility {
// convert from bitmap to byte array
public static byte[] getBytes(Bitmap bitmap) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0, stream);
return stream.toByteArray();
}
// convert from byte array to bitmap
public static Bitmap getImage(byte[] image) {
return BitmapFactory.decodeByteArray(image, 0, image.length);
}
}
Further reading
If you are not familiar how to insert and retrieve into a database, go through this tutorial.
You can create a custom class to modify the content type and add the file to the response.
The easiest method I've found for hiding the status bar throughout the entire app is by creating a category
on UIViewController
and overriding prefersStatusBarHidden
. This way you don't have to write this method in every single view controller.
#import <UIKit/UIKit.h>
@interface UIViewController (HideStatusBar)
@end
#import "UIViewController+HideStatusBar.h"
@implementation UIViewController (HideStatusBar)
//Pragma Marks suppress compiler warning in LLVM.
//Technically, you shouldn't override methods by using a category,
//but I feel that in this case it won't hurt so long as you truly
//want every view controller to hide the status bar.
//Other opinions on this are definitely welcome
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-protocol-method-implementation"
- (BOOL)prefersStatusBarHidden
{
return YES;
}
#pragma clang diagnostic pop
@end
The nature of wanting to include the row where A == 5
and all rows upto but not including the row where A == 8
means we will end up using iloc
(loc
includes both ends of slice).
In order to get the index labels we use idxmax
. This will return the first position of the maximum value. I run this on a boolean series where A == 5
(then when A == 8
) which returns the index value of when A == 5
first happens (same thing for A == 8
).
Then I use searchsorted
to find the ordinal position of where the index label (that I found above) occurs. This is what I use in iloc
.
i5, i8 = df.index.searchsorted([df.A.eq(5).idxmax(), df.A.eq(8).idxmax()])
df.iloc[i5:i8]
numpy
you can further enhance this by using the underlying numpy objects the analogous numpy functions. I wrapped it up into a handy function.
def find_between(df, col, v1, v2):
vals = df[col].values
mx1, mx2 = (vals == v1).argmax(), (vals == v2).argmax()
idx = df.index.values
i1, i2 = idx.searchsorted([mx1, mx2])
return df.iloc[i1:i2]
find_between(df, 'A', 5, 8)
If you are using sagemath cloud version, you can simply go to the left corner,
select File --> Download as --> Pdf via LaTeX (.pdf)
Check the screenshot if you want.
Screenshot Convert ipynb to pdf
If it dosn't work for any reason, you can try another way.
select File --> Print Preview and then on the preview
right click --> Print and then select save as pdf.
Both PUT and POST are Rest Methods .
PUT - If we make the same request twice using PUT using same parameters both times, the second request will not have any effect. This is why PUT is generally used for the Update scenario,calling Update more than once with the same parameters doesn't do anything more than the initial call hence PUT is idempotent.
POST is not idempotent , for instance Create will create two separate entries into the target hence it is not idempotent so CREATE is used widely in POST.
Making the same call using POST with same parameters each time will cause two different things to happen, hence why POST is commonly used for the Create scenario
In your build.gradle file add useLibrary 'org.apache.http.legacy' as per Android 6.0 Changes
> Apache HTTP Client Removal
notes.
android {
...
useLibrary 'org.apache.http.legacy'
...
}
To avoid missing link errors add to dependencies
dependencies {
provided 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
}
using 'provided' the dependency will be not included in the apk
If you have some form data for example sent to home#action, now you want to redirect them to house#act while keeping the parameters, you can do this
redirect_to act_house_path(request.parameters)
Recently I had the same problem to include QR image/png in email. The QR image is a byte array which is generated using ZXing. We do not want to save it to a file because saving/reading from a file is too expensive (slow). So both of the answers above do not work for me. Here's what I did to solve this problem:
import javax.mail.util.ByteArrayDataSource;
import org.apache.commons.mail.ImageHtmlEmail;
...
ImageHtmlEmail email = new ImageHtmlEmail();
byte[] qrImageBytes = createQRCode(); // get your image byte array
ByteArrayDataSource qrImageDataSource = new ByteArrayDataSource(qrImageBytes, "image/png");
String contentId = email.embed(qrImageDataSource, "QR Image");
Let's say the contentId is "111122223333", then your HTML part should have this:
<img src="cid: 111122223333">
There's no need to convert the byte array to Base64 because Commons Mail does the conversion for you automatically. Hope this helps.
RecyclerView doesn't have an onItemClickListener
because RecyclerView is responsible for recycling views (surprise!), so it's the responsibility of the view that is recycled to handle the click events it receives.
This actually makes it much easier to use, especially if you had items that can be clicked in multiple places.
Anyways, detecting click on a RecyclerView item is very easy. All you need to do is define an interface (if you're not using Kotlin, in which case you just pass in a lambda):
public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
private final Clicks clicks;
public MyAdapter(Clicks clicks) {
this.clicks = clicks;
}
private List<MyObject> items = Collections.emptyList();
public void updateData(List<MyObject> items) {
this.items = items;
notifyDataSetChanged(); // TODO: use ListAdapter for diffing instead if you need animations
}
public interface Clicks {
void onItemSelected(MyObject myObject, int position);
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private MyObject myObject;
public MyViewHolder(View view) {
super(view);
// bind views
view.setOnClickListener((v) -> {
int adapterPosition = getAdapterPosition();
if(adapterPosition >= 0) {
clicks.onItemSelected(myObject, adapterPosition);
}
});
}
public void bind(MyObject myObject) {
this.myObject = myObject;
// bind data to views
}
}
}
Same code in Kotlin:
class MyAdapter(val itemClicks: (MyObject, Int) -> Unit): RecyclerView.Adapter<MyViewHolder>() {
private var items: List<MyObject> = Collections.emptyList()
fun updateData(items: List<MyObject>) {
this.items = items
notifyDataSetChanged() // TODO: use ListAdapter for diffing instead if you need animations
}
inner class MyViewHolder(val myView: View): RecyclerView.ViewHolder(myView) {
private lateinit var myObject: MyObject
init {
// binds views
myView.onClick {
val adapterPosition = getAdapterPosition()
if(adapterPosition >= 0) {
itemClicks.invoke(myObject, adapterPosition)
}
}
}
fun bind(myObject: MyObject) {
this.myObject = myObject
// bind data to views
}
}
}
Thing you DON'T need to do:
1.) you don't need to intercept touch events manually
2.) you don't need to mess around with child attach state change listeners
3.) you don't need PublishSubject/PublishRelay from RxJava
Just use a click listener.
Try this code:
body {z-index:0}
img.center {z-index:-1; margin-left:auto; margin-right:auto}
Setting the left & right margins to auto should center your image.
It appears from your question that you already have a second set of DNS servers available that reference the development site instead of the live site.
I would suggest that you simply run a standard SOCKS proxy either on that DNS server system or on a low-end spare system and have that system configured to use the development DNS server. You can then tell Firefox to use that proxy instead of downloading pages directly.
Doing it this way, the actual DNS lookups will be done on the proxy machine and not on the machine that's running the web browser.
See dmp's answer below. I'd delete this answer if I could, but it was accepted so this is the next best thing :)
You can't. JS Interpreters require you to compare against the switch statement (e.g. there is no "case when" statement). If you really want to do this, you can just make if(){ .. } else if(){ .. }
blocks.
I suspect your string already actually only contains a single backslash, but you're looking at it in the debugger which is escaping it for you into a form which would be valid as a regular string literal in C#.
If print it out in the console, or in a message box, does it show with two backslashes or one?
If you actually want to replace a double backslash with a single one, it's easy to do so:
text = text.Replace(@"\\", @"\");
... but my guess is that the original doesn't contain a double backslash anyway. If this doesn't help, please give more details.
EDIT: In response to the edited question, your stringToBeReplaced
only has a single backslash in. Really. Wherever you're seeing two backslashes, that viewer is escaping it. The string itself doesn't have two backslashes. Examine stringToBeReplaced.Length
and count the characters.
here is an easy way to use join.
''.join(('a', 'b', 'c', 'd', 'g', 'x', 'r', 'e'))
I think it's all personal preference. My preferences come from using NHibernate, in .NET, with SQL Server, so they probably differ from what others use.
Honestly, it doesn't matter too much, as long as it's consistent for the project. Just get to work and don't sweat the details :P
If you need to handle lists of different sizes, worry not! The wonderful itertools module has you covered:
>>> from itertools import zip_longest
>>> list1 = [1,2,1]
>>> list2 = [2,1,2,3]
>>> [sum(x) for x in zip_longest(list1, list2, fillvalue=0)]
[3, 3, 3, 3]
>>>
In Python 2, zip_longest
is called izip_longest
.
See also this relevant answer and comment on another question.
Just leaving this here for future visitors:
In my case the /WEB-INF/classes directory was missing. If you are using Eclipse, make sure the .settings/org.eclipse.wst.common.component is correct (Deployment Assembly in the project settings).
In my case it was missing
<wb-resource deploy-path="/WEB-INF/classes" source-path="/src/main/resources"/>
<wb-resource deploy-path="/WEB-INF/classes" source-path="/src/test/resources"/>
This file is also a common source of errors as mentioned by Anuj (missing dependencies of other projects).
Otherwise, hopefully the other answers (or the "Problems" tab) will help you.
Android Studio 3.5.3 It works with this configuration.
The -H 'Cache-Control: no-cache'
argument is not guaranteed to work because the remote server or any proxy layers in between can ignore it. If it doesn't work, you can do it the old-fashioned way, by adding a unique querystring parameter. Usually, the servers/proxies will think it's a unique URL and not use the cache.
curl "http://www.example.com?foo123"
You have to use a different querystring value every time, though. Otherwise, the server/proxies will match the cache again. To automatically generate a different querystring parameter every time, you can use date +%s
, which will return the seconds since epoch.
curl "http://www.example.com?$(date +%s)"
There are several options, including using the method you demonstrate, With, and using a variable.
My preference is option 4 below: Dim
a variable of type Worksheet
and store the worksheet and call the methods on the variable or pass it to functions, however any of the options work.
Sub Test()
Dim SheetName As String
Dim SearchText As String
Dim FoundRange As Range
SheetName = "test"
SearchText = "abc"
' 0. If you know the sheet is the ActiveSheet, you can use if directly.
Set FoundRange = ActiveSheet.UsedRange.Find(What:=SearchText)
' Since I usually have a lot of Subs/Functions, I don't use this method often.
' If I do, I store it in a variable to make it easy to change in the future or
' to pass to functions, e.g.: Set MySheet = ActiveSheet
' If your methods need to work with multiple worksheets at the same time, using
' ActiveSheet probably isn't a good idea and you should just specify the sheets.
' 1. Using Sheets or Worksheets (Least efficient if repeating or calling multiple times)
Set FoundRange = Sheets(SheetName).UsedRange.Find(What:=SearchText)
Set FoundRange = Worksheets(SheetName).UsedRange.Find(What:=SearchText)
' 2. Using Named Sheet, i.e. Sheet1 (if Worksheet is named "Sheet1"). The
' sheet names use the title/name of the worksheet, however the name must
' be a valid VBA identifier (no spaces or special characters. Use the Object
' Browser to find the sheet names if it isn't obvious. (More efficient than #1)
Set FoundRange = Sheet1.UsedRange.Find(What:=SearchText)
' 3. Using "With" (more efficient than #1)
With Sheets(SheetName)
Set FoundRange = .UsedRange.Find(What:=SearchText)
End With
' or possibly...
With Sheets(SheetName).UsedRange
Set FoundRange = .Find(What:=SearchText)
End With
' 4. Using Worksheet variable (more efficient than 1)
Dim MySheet As Worksheet
Set MySheet = Worksheets(SheetName)
Set FoundRange = MySheet.UsedRange.Find(What:=SearchText)
' Calling a Function/Sub
Test2 Sheets(SheetName) ' Option 1
Test2 Sheet1 ' Option 2
Test2 MySheet ' Option 4
End Sub
Sub Test2(TestSheet As Worksheet)
Dim RowIndex As Long
For RowIndex = 1 To TestSheet.UsedRange.Rows.Count
If TestSheet.Cells(RowIndex, 1).Value = "SomeValue" Then
' Do something
End If
Next RowIndex
End Sub
Just to help new readers, I've created an example to better understand @bluefeet's answer about UNPIVOT.
SELECT id
,entityId
,indicatorname
,indicatorvalue
FROM (VALUES
(1, 1, 'Value of Indicator 1 for entity 1', 'Value of Indicator 2 for entity 1', 'Value of Indicator 3 for entity 1'),
(2, 1, 'Value of Indicator 1 for entity 2', 'Value of Indicator 2 for entity 2', 'Value of Indicator 3 for entity 2'),
(3, 1, 'Value of Indicator 1 for entity 3', 'Value of Indicator 2 for entity 3', 'Value of Indicator 3 for entity 3'),
(4, 2, 'Value of Indicator 1 for entity 4', 'Value of Indicator 2 for entity 4', 'Value of Indicator 3 for entity 4')
) AS Category(ID, EntityId, Indicator1, Indicator2, Indicator3)
UNPIVOT
(
indicatorvalue
FOR indicatorname IN (Indicator1, Indicator2, Indicator3)
) UNPIV;
There is a small problem in the solution posted by CodeGroover above , where if you change a file, you'll have to restart the server to actually use the updated file (at least, in my case).
So searching a bit, I found this one To use:
sudo npm -g install simple-http-server # to install
nserver # to use
And then it will serve at http://localhost:8000
.
Exit
[construct], and intelisense will tell you which one(s) are valid in a particular place.
Here is a more complete version of focusing on the next element. It follows the spec guidelines and sorts the list of elements correctly by using tabindex. Also a reverse variable is defined if you want to get the previous element.
function focusNextElement( reverse, activeElem ) {
/*check if an element is defined or use activeElement*/
activeElem = activeElem instanceof HTMLElement ? activeElem : document.activeElement;
let queryString = [
'a:not([disabled]):not([tabindex="-1"])',
'button:not([disabled]):not([tabindex="-1"])',
'input:not([disabled]):not([tabindex="-1"])',
'select:not([disabled]):not([tabindex="-1"])',
'[tabindex]:not([disabled]):not([tabindex="-1"])'
/* add custom queries here */
].join(','),
queryResult = Array.prototype.filter.call(document.querySelectorAll(queryString), elem => {
/*check for visibility while always include the current activeElement*/
return elem.offsetWidth > 0 || elem.offsetHeight > 0 || elem === activeElem;
}),
indexedList = queryResult.slice().filter(elem => {
/* filter out all indexes not greater than 0 */
return elem.tabIndex == 0 || elem.tabIndex == -1 ? false : true;
}).sort((a, b) => {
/* sort the array by index from smallest to largest */
return a.tabIndex != 0 && b.tabIndex != 0
? (a.tabIndex < b.tabIndex ? -1 : b.tabIndex < a.tabIndex ? 1 : 0)
: a.tabIndex != 0 ? -1 : b.tabIndex != 0 ? 1 : 0;
}),
focusable = [].concat(indexedList, queryResult.filter(elem => {
/* filter out all indexes above 0 */
return elem.tabIndex == 0 || elem.tabIndex == -1 ? true : false;
}));
/* if reverse is true return the previous focusable element
if reverse is false return the next focusable element */
return reverse ? (focusable[focusable.indexOf(activeElem) - 1] || focusable[focusable.length - 1])
: (focusable[focusable.indexOf(activeElem) + 1] || focusable[0]);
}
The correct default choice is add InterruptedException to your throws list. An Interrupt indicates that another thread wishes your thread to end. The reason for this request is not made evident and is entirely contextual, so if you don't have any additional knowledge you should assume it's just a friendly shutdown, and anything that avoids that shutdown is a non-friendly response.
Java will not randomly throw InterruptedException's, all advice will not affect your application but I have run into a case where developer's following the "swallow" strategy became very inconvenient. A team had developed a large set of tests and used Thread.Sleep a lot. Now we started to run the tests in our CI server, and sometimes due to defects in the code would get stuck into permanent waits. To make the situation worse, when attempting to cancel the CI job it never closed because the Thread.Interrupt that was intended to abort the test did not abort the job. We had to login to the box and manually kill the processes.
So long story short, if you simply throw the InterruptedException you are matching the default intent that your thread should end. If you can't add InterruptedException to your throw list, I'd wrap it in a RuntimeException.
There is a very rational argument to be made that InterruptedException should be a RuntimeException itself, since that would encourage a better "default" handling. It's not a RuntimeException only because the designers stuck to a categorical rule that a RuntimeException should represent an error in your code. Since an InterruptedException does not arise directly from an error in your code, it's not. But the reality is that often an InterruptedException arises because there is an error in your code, (i.e. endless loop, dead-lock), and the Interrupt is some other thread's method for dealing with that error.
If you know there is rational cleanup to be done, then do it. If you know a deeper cause for the Interrupt, you can take on more comprehensive handling.
So in summary your choices for handling should follow this list:
Not only can you, but you have to make a special effort not to if you don't want to. :-)
When the browser encounters a classic script
tag when parsing the HTML, it stops parsing and hands over to the JavaScript interpreter, which runs the script. The parser doesn't continue until the script execution is complete (because the script might do document.write
calls to output markup that the parser should handle).
That's the default behavior, but you have a few options for delaying script execution:
Use JavaScript modules. A type="module"
script is deferred until the HTML has been fully parsed and the initial DOM created. This isn't the primary reason to use modules, but it's one of the reasons:
<script type="module" src="./my-code.js"></script>
<!-- Or -->
<script type="module">
// Your code here
</script>
The code will be fetched (if it's separate) and parsed in parallel with the HTML parsing, but won't be run until the HTML parsing is done. (If your module code is inline rather than in its own file, it is also deferred until HTML parsing is complete.)
This wasn't available when I first wrote this answer in 2010, but here in 2020, all major modern browsers support modules natively, and if you need to support older browsers, you can use bundlers like Webpack and Rollup.js.
Use the defer
attribute on a classic script tag:
<script defer src="./my-code.js"></script>
As with the module, the code in my-code.js
will be fetched and parsed in parallel with the HTML parsing, but won't be run until the HTML parsing is done. But, defer
doesn't work with inline script content, only with external files referenced via src
.
I don't think it's what you want, but you can use the async
attribute to tell the browser to fetch the JavaScript code in parallel with the HTML parsing, but then run it as soon as possible, even if the HTML parsing isn't complete. You can put it on a type="module"
tag, or use it instead of defer
on a classic script
tag.
Put the script
tag at the end of the document, just prior to the closing </body>
tag:
<!doctype html>
<html>
<!-- ... -->
<body>
<!-- The document's HTML goes here -->
<script type="module" src="./my-code.js"></script><!-- Or inline script -->
</body>
</html>
That way, even though the code is run as soon as its encountered, all of the elements defined by the HTML above it exist and are ready to be used.
It used to be that this caused an additional delay on some browsers because they wouldn't start fetching the code until the script
tag was encountered, but modern browsers scan ahead and start prefetching. Still, this is very much the third choice at this point, both modules and defer
are better options.
The spec has a useful diagram showing a raw script
tag, defer
, async
, type="module"
, and type="module" async
and the timing of when the JavaScript code is fetched and run:
Here's an example of the default behavior, a raw script
tag:
.found {_x000D_
color: green;_x000D_
}
_x000D_
<p>Paragraph 1</p>_x000D_
<script>_x000D_
if (typeof NodeList !== "undefined" && !NodeList.prototype.forEach) {_x000D_
NodeList.prototype.forEach = Array.prototype.forEach;_x000D_
}_x000D_
document.querySelectorAll("p").forEach(p => {_x000D_
p.classList.add("found");_x000D_
});_x000D_
</script>_x000D_
<p>Paragraph 2</p>
_x000D_
(See my answer here for details around that NodeList
code.)
When you run that, you see "Paragraph 1" in green but "Paragraph 2" is black, because the script ran synchronously with the HTML parsing, and so it only found the first paragraph, not the second.
In contrast, here's a type="module"
script:
.found {_x000D_
color: green;_x000D_
}
_x000D_
<p>Paragraph 1</p>_x000D_
<script type="module">_x000D_
document.querySelectorAll("p").forEach(p => {_x000D_
p.classList.add("found");_x000D_
});_x000D_
</script>_x000D_
<p>Paragraph 2</p>
_x000D_
Notice how they're both green now; the code didn't run until HTML parsing was complete. That would also be true with a defer
script
with external content (but not inline content).
(There was no need for the NodeList
check there because any modern browser supporting modules already has forEach
on NodeList
.)
In this modern world, there's no real value to the DOMContentLoaded
event of the "ready" feature that PrototypeJS, jQuery, ExtJS, Dojo, and most others provided back in the day (and still provide); just use modules or defer
. Even back in the day, there wasn't much reason for using them (and they were often used incorrectly, holding up page presentation while the entire jQuery library was loaded because the script
was in the head
instead of after the document), something some developers at Google flagged up early on. This was also part of the reason for the YUI recommendation to put scripts at the end of the body
, again back in the day.
This should do it:
$("label[for=comedyclubs]")
If you have non alphanumeric characters in your id then you must surround the attr value with quotes:
$("label[for='comedy-clubs']")
Installing on a Mac - Sierra - After numerous failed attempts to install and run gulp globally via the command line using several different instructions I found I added this to my path and it worked:
export PATH=/usr/local/Cellar/node/7.6.0/libexec/npm/bin/:$PATH
I got that path from the text output when installing gulp.
Have you tried to correct the syntax like this?:
create or replace procedure temp_proc AS
begin
DBMS_OUTPUT.PUT_LINE('Test');
end;
Simplest way? It works. :)
Dim queryString As String = "Stor_Proc_Name " & data1 & "," & data2
Try
Using connection As New SqlConnection(ConnStrg)
connection.Open()
Dim command As New SqlCommand(queryString, connection)
Dim reader As SqlDataReader = command.ExecuteReader()
Dim DTResults As New DataTable
DTResults.Load(reader)
MsgBox(DTResults.Rows(0)(0).ToString)
End Using
Catch ex As Exception
MessageBox.Show("Error while executing .. " & ex.Message, "")
Finally
End Try
Write Code in Text_KeyPress Event as
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsLetter(e.KeyChar))
{
e.Handled = true;
}
}
As of Visual Studio Code version 1.12.0, April 2017, see Basic Editing > Folding section in the docs.
The default keys are:
Fold All: CTRL+K, CTRL+0 (zero)
Fold Level [n]: CTRL+K, CTRL+[n]*
Unfold All: CTRL+K, CTRL+J
Fold Region: CTRL+K, CTRL+[
Unfold Region: CTRL+K, CTRL+]
*Fold Level: to fold all but the most outer classes, try CTRL+K, CTRL+1
Macs: use ? instead of CTRL (thanks Prajeet)
HTTP transaction, basic access authentication, is not suitable for RBAC, because basic access authentication uses the encrypted username:password every time to identify, while what is needed in RBAC is the Role the user wants to use for a specific call. RBAC does not validate permissions on username, but on roles.
You could tric around to concatenate like this: usernameRole:password, but this is bad practice, and it is also inefficient because when a user has more roles, the authentication engine would need to test all roles in concatenation, and that every call again. This would destroy one of the biggest technical advantages of RBAC, namely a very quick authorization-test.
So that problem cannot be solved using basic access authentication.
To solve this problem, session-maintaining is necessary, and that seems, according to some answers, in contradiction with REST.
That is what I like about the answer that REST should not be treated as a religion. In complex business cases, in healthcare, for example, RBAC is absolutely common and necessary. And it would be a pity if they would not be allowed to use REST because all REST-tools designers would treat REST as a religion.
For me there are not many ways to maintain a session over HTTP. One can use cookies, with a sessionId, or a header with a sessionId.
If someone has another idea I will be glad to hear it.
Actually, scala has old Java-style loops with index:
scala> val xs = Array("first","second","third")
xs: Array[java.lang.String] = Array(first, second, third)
scala> for (i <- 0 until xs.length)
| println("String # " + i + " is "+ xs(i))
String # 0 is first
String # 1 is second
String # 2 is third
Where 0 until xs.length
or 0.until(xs.length)
is a RichInt
method which returns Range
suitable for looping.
Also, you can try loop with to
:
scala> for (i <- 0 to xs.length-1)
| println("String # " + i + " is "+ xs(i))
String # 0 is first
String # 1 is second
String # 2 is third
var startTime = new Date('2012/10/09 12:00');
var endTime = new Date('2013/10/09 12:00');
var difference = endTime.getTime() - startTime.getTime(); // This will give difference in milliseconds
var resultInMinutes = Math.round(difference / 60000);
The Fastest
var string = "hello", substring = "lo"; string.includes(substring);
var string = "hello", substring = "lo"; string.indexOf(substring) !== -1;
count_smiths = (df['LastName'] == 'Smith').sum()
Straight forward and pretty easy:
Your dropdown
<select id="aioConceptName">
<option>choose io</option>
<option>roma</option>
<option>totti</option>
</select>
Jquery code to get the selected value
$('#aioConceptName').change(function() {
var $option = $(this).find('option:selected');
//Added with the EDIT
var value = $option.val(); //returns the value of the selected option.
var text = $option.text(); //returns the text of the selected option.
});
Just fyi, if you're trying to ensure the ship doesn't go off of the screen with
location-=1
if location==-1:
location=0
you can probably better use
location -= 1
location = max(0, location)
This way if it skips -1 your program doesn't break
try this:
.test {
position:absolute;
background:blue;
width:200px;
height:200px;
top:40px;
transition:left 1s linear;
left: 0;
}
This worked for me: Open task manager (of your OS) and kill adb.exe process. Now start adb again, now adb should start normally.
My solution for replacing ${variable} style tokens (inspired by the answers here and by the Spring UriTemplate):
public static String substituteVariables(String template, Map<String, String> variables) {
Pattern pattern = Pattern.compile("\\$\\{(.+?)\\}");
Matcher matcher = pattern.matcher(template);
// StringBuilder cannot be used here because Matcher expects StringBuffer
StringBuffer buffer = new StringBuffer();
while (matcher.find()) {
if (variables.containsKey(matcher.group(1))) {
String replacement = variables.get(matcher.group(1));
// quote to work properly with $ and {,} signs
matcher.appendReplacement(buffer, replacement != null ? Matcher.quoteReplacement(replacement) : "null");
}
}
matcher.appendTail(buffer);
return buffer.toString();
}
Add a label control to your Repeater's ItemTemplate. Handle OnItemCreated event.
ASPX
<asp:Repeater ID="rptr" runat="server" OnItemCreated="RepeaterItemCreated">
<ItemTemplate>
<div id="width:50%;height:30px;background:#0f0a0f;">
<asp:Label ID="lblSr" runat="server"
style="width:30%;float:left;text-align:right;text-indent:-2px;" />
<span
style="width:65%;float:right;text-align:left;text-indent:-2px;" >
<%# Eval("Item") %>
</span>
</div>
</ItemTemplate>
</asp:Repeater>
Code Behind:
protected void RepeaterItemCreated(object sender, RepeaterItemEventArgs e)
{
Label l = e.Item.FindControl("lblSr") as Label;
if (l != null)
l.Text = e.Item.ItemIndex + 1+"";
}
I think may be you should try to convert the data to json format. It can be done by using gson lib. Try something like below.
I don't know it is a best solutions or not but you could do it this way.It worked for me
example : `
@GET
@Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public Response info(@HeaderParam("Accept") String accept) {
Info information = new Info();
information.setInfo("Calc Application Info");
System.out.println(accept);
if (!accept.equals(MediaType.APPLICATION_JSON)) {
return Response.status(Status.ACCEPTED).entity(information).build();
} else {
Gson jsonConverter = new GsonBuilder().create();
return Response.status(Status.ACCEPTED).entity(jsonConverter.toJson(information)).build();
}
}
Having a "table" in memory that needs lookups, sorting, and arbitrary aggregation really does call out for SQL. You said you tried SQLite, but did you realize that SQLite can use an in-memory-only database?
connection = sqlite3.connect(':memory:')
Then you can create/drop/query/update tables in memory with all the functionality of SQLite and no files left over when you're done. And as of Python 2.5, sqlite3
is in the standard library, so it's not really "overkill" IMO.
Here is a sample of how one might create and populate the database:
import csv
import sqlite3
db = sqlite3.connect(':memory:')
def init_db(cur):
cur.execute('''CREATE TABLE foo (
Row INTEGER,
Name TEXT,
Year INTEGER,
Priority INTEGER)''')
def populate_db(cur, csv_fp):
rdr = csv.reader(csv_fp)
cur.executemany('''
INSERT INTO foo (Row, Name, Year, Priority)
VALUES (?,?,?,?)''', rdr)
cur = db.cursor()
init_db(cur)
populate_db(cur, open('my_csv_input_file.csv'))
db.commit()
If you'd really prefer not to use SQL, you should probably use a list of dictionaries:
lod = [ ] # "list of dicts"
def populate_lod(lod, csv_fp):
rdr = csv.DictReader(csv_fp, ['Row', 'Name', 'Year', 'Priority'])
lod.extend(rdr)
def query_lod(lod, filter=None, sort_keys=None):
if filter is not None:
lod = (r for r in lod if filter(r))
if sort_keys is not None:
lod = sorted(lod, key=lambda r:[r[k] for k in sort_keys])
else:
lod = list(lod)
return lod
def lookup_lod(lod, **kw):
for row in lod:
for k,v in kw.iteritems():
if row[k] != str(v): break
else:
return row
return None
Testing then yields:
>>> lod = []
>>> populate_lod(lod, csv_fp)
>>>
>>> pprint(lookup_lod(lod, Row=1))
{'Name': 'Cat', 'Priority': '1', 'Row': '1', 'Year': '1998'}
>>> pprint(lookup_lod(lod, Name='Aardvark'))
{'Name': 'Aardvark', 'Priority': '1', 'Row': '4', 'Year': '2000'}
>>> pprint(query_lod(lod, sort_keys=('Priority', 'Year')))
[{'Name': 'Cat', 'Priority': '1', 'Row': '1', 'Year': '1998'},
{'Name': 'Dog', 'Priority': '1', 'Row': '3', 'Year': '1999'},
{'Name': 'Aardvark', 'Priority': '1', 'Row': '4', 'Year': '2000'},
{'Name': 'Wallaby', 'Priority': '1', 'Row': '5', 'Year': '2000'},
{'Name': 'Fish', 'Priority': '2', 'Row': '2', 'Year': '1998'},
{'Name': 'Zebra', 'Priority': '3', 'Row': '6', 'Year': '2001'}]
>>> pprint(query_lod(lod, sort_keys=('Year', 'Priority')))
[{'Name': 'Cat', 'Priority': '1', 'Row': '1', 'Year': '1998'},
{'Name': 'Fish', 'Priority': '2', 'Row': '2', 'Year': '1998'},
{'Name': 'Dog', 'Priority': '1', 'Row': '3', 'Year': '1999'},
{'Name': 'Aardvark', 'Priority': '1', 'Row': '4', 'Year': '2000'},
{'Name': 'Wallaby', 'Priority': '1', 'Row': '5', 'Year': '2000'},
{'Name': 'Zebra', 'Priority': '3', 'Row': '6', 'Year': '2001'}]
>>> print len(query_lod(lod, lambda r:1997 <= int(r['Year']) <= 2002))
6
>>> print len(query_lod(lod, lambda r:int(r['Year'])==1998 and int(r['Priority']) > 2))
0
Personally I like the SQLite version better since it preserves your types better (without extra conversion code in Python) and easily grows to accommodate future requirements. But then again, I'm quite comfortable with SQL, so YMMV.
No, Java doesn't support user-defined operator overloading. The only aspect of Java which comes close to "custom" operator overloading is the handling of + for strings, which either results in compile-time concatenation of constants or execution-time concatenation using StringBuilder/StringBuffer. You can't define your own operators which act in the same way though.
For a Java-like (and JVM-based) language which does support operator overloading, you could look at Kotlin or Groovy. Alternatively, you might find luck with a Java compiler plugin solution.
Configuring this worked for me: -vmargs -Xms1536m -Xmx2048m -XX:MaxPermSize=1024m on Eclipse Java Photon June 2018
Running Windows 10, 8 GB ram and 64 bit. You can extend -Xmx2048 -XX:MaxpermSize= 1024m to 4096m too, if your computer has good ram.Mine worked well.
In addition to previous post you can have
<h:form rendered="#{!bean.boolvalue}" />
<h:form rendered="#{bean.textvalue == 'value'}" />
Jsf 2.0
It means that you have to have PHP installed as a module in Apache, instead of starting it as a CGI script.
Try (in your <head> section, or existing css definitions)...
<style>
body {
margin:0;
padding:0;
}
</style>
Setting the icon
property when creating the BrowserWindow
only has an effect on Windows and Linux.
To set the icon on OS X, you can use electron-packager and set the icon using the --icon
switch.
It will need to be in .icns format for OS X. There is an online icon converter which can create this file from your .png.
If you are looking for a popup in the page, that is not a new browser window, then I would take a look at the various "LightBox" implementations in Javascript.
At runtime, you know what style you want your button to have. So beforehand, in xml in the layout folder, you can have all ready to go buttons with the styles you need. So in the layout folder, you might have a file named: button_style_1.xml. The contents of that file might look like:
<?xml version="1.0" encoding="utf-8"?>
<Button
android:id="@+id/styleOneButton"
style="@style/FirstStyle" />
If you are working with fragments, then in onCreateView you inflate that button, like:
Button firstStyleBtn = (Button) inflater.inflate(R.layout.button_style_1, container, false);
where container is the ViewGroup container associated with the onCreateView method you override when creating your fragment.
Need two more such buttons? You create them like this:
Button secondFirstStyleBtn = (Button) inflater.inflate(R.layout.button_style_1, container, false);
Button thirdFirstStyleBtn = (Button) inflater.inflate(R.layout.button_style_1, container, false);
You can customize those buttons:
secondFirstStyleBtn.setText("My Second");
thirdFirstStyleBtn.setText("My Third");
Then you add your customized, stylized buttons to the layout container you also inflated in the onCreateView method:
_stylizedButtonsContainer = (LinearLayout) rootView.findViewById(R.id.stylizedButtonsContainer);
_stylizedButtonsContainer.addView(firstStyleBtn);
_stylizedButtonsContainer.addView(secondFirstStyleBtn);
_stylizedButtonsContainer.addView(thirdFirstStyleBtn);
And that's how you can dynamically work with stylized buttons.
Java objects reside in an area called the heap, while metadata such as class objects and method objects reside in the permanent generation or Perm Gen area. The permanent generation is not part of the heap.
The heap is created when the JVM starts up and may increase or decrease in size while the application runs. When the heap becomes full, garbage is collected. During the garbage collection objects that are no longer used are cleared, thus making space for new objects.
-Xmssize Specifies the initial heap size.
-Xmxsize Specifies the maximum heap size.
-XX:MaxPermSize=size Sets the maximum permanent generation space size. This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option.
Sizes are expressed in bytes. Append the letter k
or K
to indicate kilobytes, m
or M
to indicate megabytes, g
or G
to indicate gigabytes.
How is the java memory pool divided?
Java (JVM) Memory Model – Memory Management in Java
i had the same issue and niether of the above resoved it. It turns out there was an old sql task that was disabled on the bottom right corner of my ssis that i really had to look for to find. Once i deleted this all was well
run this after you installed any version,
n=$(which node);n=${n%/bin/node}; chmod -R 755 $n/bin/*; sudo cp -r $n/{bin,lib,share} /usr/local
This command is copying whatever version of node you have active via nvm into the /usr/local/ directory and setting the permissions so that all users can access them.
without jQuery you can use
document.getElementById('text_input').setAttribute('maxlength',200);
Change the <a>
tag like this:
<a href="newsletter_01.pdf" target="_blank">
You can find more about the target
attribute here.
If I remember well, some CSS properties you apply to table
are not inherited as expected. So you should indeed apply the style directly to td
,tr
and th
elements.
If you need to add styling to each column, use the <col>
element in your table.
See an example here: http://jsfiddle.net/GlauberRocha/xkuRA/2/
NB: You can't have a margin
in a td
. Use padding
instead.
Or with the power of Java 8 Optional, you also can do such trick:
Optional.ofNullable(boolValue).orElse(false)
:)
I am siteConfiguration class for calling all my appSetting like this way. I share it if it will help anyone.
add the following code at the "web.config"
<configuration>
<configSections>
<!-- some stuff omitted here -->
</configSections>
<appSettings>
<add key="appKeyString" value="abc" />
<add key="appKeyInt" value="123" />
</appSettings>
</configuration>
Now you can define a class for getting all your appSetting value. like this
using System;
using System.Configuration;
namespace Configuration
{
public static class SiteConfigurationReader
{
public static String appKeyString //for string type value
{
get
{
return ConfigurationManager.AppSettings.Get("appKeyString");
}
}
public static Int32 appKeyInt //to get integer value
{
get
{
return ConfigurationManager.AppSettings.Get("appKeyInt").ToInteger(true);
}
}
// you can also get the app setting by passing the key
public static Int32 GetAppSettingsInteger(string keyName)
{
try
{
return Convert.ToInt32(ConfigurationManager.AppSettings.Get(keyName));
}
catch
{
return 0;
}
}
}
}
Now add the reference of previous class and to access a key call like bellow
string appKeyStringVal= SiteConfigurationReader.appKeyString;
int appKeyIntVal= SiteConfigurationReader.appKeyInt;
int appKeyStringByPassingKey = SiteConfigurationReader.GetAppSettingsInteger("appKeyInt");
I'd like to suggest a yet-unmentioned solution: use CSS3's calc()
to mix %
and px
units. calc()
has excellent support nowadays, and it allows for fast construction of quite complex layouts.
Here's a JSFiddle link for the code below.
HTML:
<div class="sidebar">
sidebar fixed width
</div>
<div class="content">
content flexible width
</div>
CSS:
.sidebar {
width: 180px;
float: right;
background: green;
}
.content {
width: calc(100% - 180px);
background: orange;
}
And here's another JSFiddle demonstrating this concept applied to a more complex layout. I used SCSS here since its variables allow for flexible and self-descriptive code, but the layout can be easily re-created in pure CSS if having "hard-coded" values is not an issue.
Swift 4.x version
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = NSURL(fileURLWithPath: path)
if let pathComponent = url.appendingPathComponent("nameOfFileHere") {
let filePath = pathComponent.path
let fileManager = FileManager.default
if fileManager.fileExists(atPath: filePath) {
print("FILE AVAILABLE")
} else {
print("FILE NOT AVAILABLE")
}
} else {
print("FILE PATH NOT AVAILABLE")
}
Swift 3.x version
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = URL(fileURLWithPath: path)
let filePath = url.appendingPathComponent("nameOfFileHere").path
let fileManager = FileManager.default
if fileManager.fileExists(atPath: filePath) {
print("FILE AVAILABLE")
} else {
print("FILE NOT AVAILABLE")
}
Swift 2.x version, need to use URLByAppendingPathComponent
let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
let url = NSURL(fileURLWithPath: path)
let filePath = url.URLByAppendingPathComponent("nameOfFileHere").path!
let fileManager = NSFileManager.defaultManager()
if fileManager.fileExistsAtPath(filePath) {
print("FILE AVAILABLE")
} else {
print("FILE NOT AVAILABLE")
}
To drop last n rows:
df.drop(df.tail(n).index,inplace=True) # drop last n rows
By the same vein, you can drop first n rows:
df.drop(df.head(n).index,inplace=True) # drop first n rows
Getting a stack trace of an unprepared python program, running in a stock python without debugging symbols can be done with pyrasite. Worked like a charm for me in on Ubuntu Trusty:
$ sudo pip install pyrasite
$ echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
$ sudo pyrasite 16262 dump_stacks.py # dumps stacks to stdout/stderr of the python program
(Hat tip to @Albert, whose answer contained a pointer to this, among other tools.)
Just to complete the existing answers, I'd suggest using select instead of nonblocking sockets. The point is that nonblocking sockets complicate stuff (except perhaps sending), so I'd say there is no reason to use them at all. If you regularly have the problem that your app is blocked waiting for IO, I would also consider doing the IO in a separate thread in the background.
There's no operator for such usage in C, but a family of functions:
double pow (double base , double exponent);
float powf (float base , float exponent);
long double powl (long double base, long double exponent);
Note that the later two are only part of standard C since C99.
If you get a warning like:
"incompatible implicit declaration of built in function 'pow' "
That's because you forgot #include <math.h>
.
resize:none; This property fix your text area and bound it. you use this css property id your textarea.gave text area an id and on the behalf of that id you can use this css property.
You are off slightly on a few things here, so hopefully the following helps.
Firstly, you don't need to select ranges to access their properties, you can just specify their address etc. Secondly, unless you are manipulating the values within the range, you don't actually need to set them to a variant. If you do want to manipulate the values, you can leave out the bounds of the array as it will be set when you define the range.
It's also good practice to use Option Explicit
at the top of your modules to force variable declaration.
The following will do what you are after:
Sub ARRAYER()
Dim Number_of_Sims As Integer, i As Integer
Number_of_Sims = 10
For i = 1 To Number_of_Sims
'Do your calculation here to update C4 to G4
Range(Cells(4 + i, "C"), Cells(4 + i, "G")).Value = Range("C4:G4").Value
Next
End Sub
If you do want to manipulate the values within the array then do this:
Sub ARRAYER()
Dim Number_of_Sims As Integer, i As Integer
Dim anARRAY as Variant
Number_of_Sims = 10
For i = 1 To Number_of_Sims
'Do your calculation here to update C4 to G4
anARRAY= Range("C4:G4").Value
'You can loop through the array and manipulate it here
Range(Cells(4 + i, "C"), Cells(4 + i, "G")).Value = anARRAY
Next
End Sub
i tought i added wrongly, then i realize the problem is it not support arc, so check the support one here, life saver -> http://www.michaelbabiy.com/arc-compliant-gdataxml-library/
in a Microsoft SQL Server you can use this:
declare @sql2 nvarchar(2000)
set @sql2 ='
use ?
if ( db_name(db_id()) not in (''master'',''tempdb'',''model'',''msdb'',''SSISDB'') )
begin
select
db_name() as db,
SS.name as schemaname,
SO.name tablename,
SC.name columnname,
ST.name type,
case when ST.name in (''nvarchar'', ''nchar'')
then convert(varchar(10), ( SC.max_length / 2 ))
when ST.name in (''char'', ''varchar'')
then convert(varchar(10), SC.max_length)
else null
end as length,
case when SC.is_nullable = 0 then ''No'' when SC.is_nullable = 1 then ''Yes'' else null end as nullable,
isnull(SC.column_id,0) as col_number
from sys.objects SO
join sys.schemas SS
on SS.schema_id = SO.schema_id
join sys.columns SC
on SO.object_id = SC.object_id
left join sys.types ST
on SC.user_type_id = ST.user_type_id and SC.system_type_id = ST.system_type_id
where SO.is_ms_shipped = 0
end
'
exec sp_msforeachdb @command1 = @sql2
this shows you all tables and columns ( and their definition ) from all userdefined databases.
I have a Web Application with several other referenced Projects in the Solution. I've deployed successfully with a single Publish configuration many times in the past. I changed the Project Configuration from Debug to Release for a Project that had been missed in the past. The next time I attempted to deploy I got these symptoms, where the Publish just quietly fails - it does nothing and says it succeeded:
1>------ Build started: Project: Project, Configuration: DeployProduction Any CPU ------
1>
2>Publishing folder /...
========== Build: 1 succeeded, 0 failed, 9 up-to-date, 0 skipped ==========
========== Publish: 1 succeeded, 0 failed, 0 skipped ==========
The only way to recover it was to wipe out the Publish profile, close Visual Studio to force it to save the deletion, reopen it, and recreate the Publish profile from scratch. Once I did that I could Publish fine again.
Win8 VS2012, crappy laptop.
Click on Start menu > Programs > Microsoft Sql Server > Configuration Tools
Select Sql Server Surface Area Configuration.
Now click on Surface Area configuration for services and connections
On the left pane of pop up window click on Remote Connections and Select Local and Remote connections radio button.
Select Using both TCP/IP and named pipes radio button.
click on apply and ok.
Now when try to connect to sql server using sql username and password u'll get the error mentioned below
Cannot connect to SQLEXPRESS.
ADDITIONAL INFORMATION:
Login failed for user 'username'. The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452) ation To fix this error follow steps mentioned below
connect to sql server using window authentication.
Now right click on your server name at the top in left pane and select properties.
Click on security and select sql server and windows authentication mode radio button.
Click on OK.
restart sql server servive by right clicking on server name and select restart.
Now your problem should be fixed and u'll be able to connect using sql server username and password.
Have fun. Ateev Gupta
There seems to be some confusion over how to get this set up for the Express version specifically. Using the Windows Desktop (WD) version of VS Express 2012, I followed the instructions in Steve B's and Rick Martin's answers with the modifications below.
"C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\Extensions\Microsoft\XNA Game Studio 4.0"
, copy to "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\WDExpressExtensions\Microsoft\XNA Game Studio 4.0"
<Edition>WDExpress</Edition>
(you should be able to see where it makes sense)devenv.exe
with WDExpress.exe
"%LocalAppData%\Microsoft\VisualStudio\11.0\Extensions"
with "%LocalAppData%\Microsoft\WDExpress\11.0\Extensions"
I haven't done a lot of work since then, but I did manage to create a new game project and it seems fine so far.
you can write multiple lines in case of different minutes, for example you want to run at 10:01 AM and 2:30 PM
1 10 * * * php -f /var/www/package/index.php controller function
30 14 * * * php -f /var/www/package/index.php controller function
but the following is the best solution for running cron multiple times in a day as minutes are same, you can mention hours like 10,30
.
30 10,14 * * * php -f /var/www/package/index.php controller function
stat() works on Linux., UNIX and Windows as well:
#include <sys/types.h>
#include <sys/stat.h>
struct stat info;
if( stat( pathname, &info ) != 0 )
printf( "cannot access %s\n", pathname );
else if( info.st_mode & S_IFDIR ) // S_ISDIR() doesn't exist on my windows
printf( "%s is a directory\n", pathname );
else
printf( "%s is no directory\n", pathname );
jQuery.fn.swap = function(b){
b = jQuery(b)[0];
var a = this[0];
var t = a.parentNode.insertBefore(document.createTextNode(''), a);
b.parentNode.insertBefore(a, b);
t.parentNode.insertBefore(b, t);
t.parentNode.removeChild(t);
return this;
};
and use it like this:
$('#div1').swap('#div2');
if you don't want to use jQuery you could easily adapt the function.
There is an serial I/O chip on your motherboard's CPU (16650 UART). This chip uses 8-bit port as control and data bus, and thus you can issue a command to it through writing to this chip through the control and data bus.
Usually, an application did the following steps on the serial port
In short, you can specify the baud rate only in the STTY command, and then all other options would be kept as default, and it should enough to connect to ohter devices.
When you cherry-pick, it creates a new commit with a new SHA. If you do:
git cherry-pick -x <sha>
then at least you'll get the commit message from the original commit appended to your new commit, along with the original SHA, which is very useful for tracking cherry-picks.
A Simple Solution: It work's for me
<div class="form-group">
<label for="mcategory">Select Category</label>
<select class="form-control" id="mcategory" name="mcategory" required>
<option value="">Please select category</option>
<?php foreach ($result_cat as $result): ?>
<option value="<?php echo $result['name'];?>"<?php
if($result['name']==$mcategory){
echo 'selected';
} ?>><?php echo $result['name']; ?></option>
}
<?php endforeach; ?>
</select>
</div>
The simple way to avoid this is not to use the worksheet method ShowAllData
Autofilter has the same ShowAllData method which doesn't throw an error when the filter is enabled but no filter is set
If ActiveSheet.AutoFilterMode Then ActiveSheet.AutoFilter.ShowAllData
If you want to include foreign language letters as well, you can try:
String string = "hippopotamus";
if (string.matches("^[\\p{L}0-9']+$")){
string is alphanumeric do something here...
}
Or if you wanted to allow a specific special character, but not any others. For example for # or space, you can try:
String string = "#somehashtag";
if(string.matches("^[\\p{L}0-9'#]+$")){
string is alphanumeric plus #, do something here...
}
Or maybe
background: transparent !important;
color: #ffffff;
You can also init multiple values if your selectbox is a multipl:
$('#selectBox').val(['A', 'B', 'C']);
Well @sonida's answer helped me but Here I am posting complete step How I did it.
Change Mobile Device Settings:
Download Google USB Driver:
5 .Now go to http://developer.android.com/sdk/win-usb.html#top and download USB Drivers --> unzip folder.
Install USB Drivers and Get Connected Device:
6.Then Right click on My computer -->Manage --> Device Manager.
7.You should seed Nexus 5 in the list.
8.Right click on Nexus 5 --> Update Driver Software... --> Browse my computer for driver software
9.select the folder we downloaded/unzipped "latest_usb_driver_windows" and Next ...Ok.
10.Now you will see pop-up dialogue asking for Allow device --> Ok.
11 .That's it!! device is connected now, you can see in DDMS.
Hope this will help someone.
Based on previous answers this has worked for me with Python 3.7
from urllib.request import Request, urlopen
req = Request('Url_Link', headers={'User-Agent': 'XYZ/3.0'})
webpage = urlopen(req, timeout=10).read()
print(webpage)
Array.filter is not implemented in many browsers,It is better to define this function if it does not exist.
The source code for Array.prototype is posted in MDN
if (!Array.prototype.filter)
{
Array.prototype.filter = function(fun /*, thisp */)
{
"use strict";
if (this == null)
throw new TypeError();
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun != "function")
throw new TypeError();
var res = [];
var thisp = arguments[1];
for (var i = 0; i < len; i++)
{
if (i in t)
{
var val = t[i]; // in case fun mutates this
if (fun.call(thisp, val, i, t))
res.push(val);
}
}
return res;
};
}
see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter for more details
Eamon Nerbonne, I changed some css in your code and it's better now(the scroll bar starts from the first row)
I just add two line :
.div : padding-left:5em;
.headcol : background-color : #fff;
Just in case if you can't change HTML. Very primitive but short & works. (It will empty the parent div hence the child divs will be removed)
$('#one').text('Hi I am replace');
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
<div id="one">_x000D_
<div class="first"></div>_x000D_
"Hi I am text"_x000D_
<div class="second"></div>_x000D_
<div class="third"></div>_x000D_
</div>
_x000D_
If you don't care about rouding, just convert the number to a string, then remove everything after the period including the period. This works whether there is a decimal or not.
const sEpoch = ((+new Date()) / 1000).toString();
const formattedEpoch = sEpoch.split('.')[0];
Yes, to make it run in the background create a shortcut to the batch file and go into the properties. I'm on a Linux machine ATM but I believe the option you are wanting is in the advanced tab.
You can also run your batch script through a vbs script like this:
'HideBat.vbs
CreateObject("Wscript.Shell").Run "your_batch_file.bat", 0, True
This will execute your batch file with no cmd window shown.
In textpad.
Go to left top of the page. hold "shift key Now use right arrow key to select column. Now click "down arrow" key. And the entire column will be selected.
Use the command-line option -O0
(-[capital o][zero]) to disable optimization, and -S
to get assembly file. Look here to see more gcc command-line options.
I had the same error. I had imported a audio frame work that i was no longer using. I removed it (DO NOT DELETE IT!) and it built successfully.
For just a boolean match result or for a count of occurrences, you could use:
use 5.014; use strict; use warnings;
my @foo=('hello', 'world', 'foo', 'bar', 'hello world', 'HeLlo');
my $patterns=join(',',@foo);
for my $str (qw(quux world hello hEllO)) {
my $count=map {m/^$str$/i} @foo;
if ($count) {
print "I found '$str' $count time(s) in '$patterns'\n";
} else {
print "I could not find '$str' in the pattern list\n"
};
}
Output:
I could not find 'quux' in the pattern list
I found 'world' 1 time(s) in 'hello,world,foo,bar,hello world,HeLlo'
I found 'hello' 2 time(s) in 'hello,world,foo,bar,hello world,HeLlo'
I found 'hEllO' 2 time(s) in 'hello,world,foo,bar,hello world,HeLlo'
Does not require to use a module.
Of course it's less "expandable" and versatile as some code above.
I use this for interactive user answers to match against a predefined set of case unsensitive answers.