How update the content of a file, "teste.java" as example with the result of a transformation?
loc s = |project://java-sample/teste.java|;
content = readFile(s);
CompilationUnit cUnit = parse(#CompilationUnit, content);
visit(cUnit) {
case (Statement) `if (<Expression cond>) { return true; } else { return false; }` =>
(Statement) `return <Expression cond>;`
}
The visit returns the new tree. You can save that tree to a file using writeFile that will unparse it and save the file:
loc s = |project://java-sample/teste.java|;
content = readFile(s);
CompilationUnit cUnit = parse(#CompilationUnit, content);
cUnitNew = visit(cUnit) { // note the assignment!
case (Statement) `if (<Expression cond>) { return true; } else { return false; }` =>
(Statement) `return <Expression cond>;`
}
writeFile(s, cUnitNew); // write the new string to disk
Related
I have a list view that list the activities. I have a way to get the selected values. What I don't know is how can I check if the user doesn't select any items from the list. How can I do this?
This is how I populate my list this will return at least 5-20 activities:
public void Get_Activities()
{
try
{
var db = DependencyService.Get<ISQLiteDB>();
var conn = db.GetConnection();
var getActivity = conn.QueryAsync<ActivityTable>("SELECT * FROM tblActivity WHERE Deleted != '1' ORDER BY ActivityDescription");
var resultCount = getActivity.Result.Count;
if (resultCount > 0)
{
var result = getActivity.Result;
lstActivity.ItemsSource = result;
lstActivity.IsVisible = true;
}
else
{
lstActivity.IsVisible = false;
}
}
catch (Exception ex)
{
//Crashes.TrackError(ex);
}
}
And this is how I get the values of the selected items on my list:
foreach(var x in result)
{
if (x.Selected)
{
// do something with the selected items
}
}
My question is like this
if(list.selecteditemcount == 0){
DisplayAlert("Error","Please select atleast 1 item","Ok");
}
In xamarin projects you can use Linq (using System.Linq). With Linq it's really easy to filter your list like that:
if(!list.Any(x => x.Selected == true))
{
// DisplayAlert...
}
This basically checks if any of your items has the value Selected='true'
Or without Linq you can do something like this:
if(list.FindAll(x => x.Selected).Count() == 0)
{
//DisplayAlert...
}
Use this
if (result.Any(x => x.Selected))
{
}
else
{
await DisplayAlert("Application Error", "Please choose at least one(1) activity", "Ok");
}
I'm quite used to nextSiblingand nextElementSibling in the DOM. Is there an easy way of doing a similar thing with Boomla files?
I would need the next sibling within the same placeholder (and null if this is the last), but I'd be interested about finding the next sibling in any placeholder (and null if this is the last file in the last placeholder).
Currently, there is no built-in method for this.
Here are 2 methods for the sjs-4 engine for getting the next in the placeholder or parent:
var nextInBucket = function(f) {
var bucket = f.bucketId();
var bucketSiblings = f.query("../:" + bucket);
var path = f.path();
var index = 0;
var found = false;
bucketSiblings.each(function(t) {
if (t.path() == path) {
found = true;
return false;
}
index++;
});
if ( ! found) {
return null;
}
return bucketSiblings.eq(index + 1);
}
var nextInParent = function(f) {
var parentChildren = f.query("../*");
var path = f.path();
var index = 0;
var found = false;
parentChildren.each(function(t) {
if (t.path() == path) {
found = true;
return false;
}
index++;
});
if ( ! found) {
return null;
}
return parentChildren.eq(index + 1);
}
I use Xamarin-CrossDownloadManager (https://github.com/SimonSimCity/Xamarin-CrossDownloadManager) and I need waiting for download a file. I have this code:
private static async Task<bool> FileDownloadedTest(string LinkToFile, string PathFile)
{
var downloadManager = CrossDownloadManager.Current;
CrossDownloadManager.Current.PathNameForDownloadedFile = new System.Func<IDownloadFile, string>(file => {
return PathFile;
});
{
await DeleteFile(PathFile);
var file = downloadManager.CreateDownloadFile(LinkToFile);
await Task.Run(() => downloadManager.Start(file, true)); //why this not wait???
}
bool FileExist = await IsFileExist(PathFile);
return FileExist;
}
Why it not wait for finish download action? How to do it?
On library site they wrote, that I can watch the IDownloadManager.Queue to get information when the file is downloaded. But, I don't know how to use this in my method... Can you help me?
PS: Sorry for my english, I'm still learning it ;)
With that library, there is no callback or event published for when a file is finished downloading, but you can do a simple check and wait some more loop.
await Task.Run(async () =>
{
var downloadManager = CrossDownloadManager.Current;
var file = downloadManager.CreateDownloadFile(someFileBasedUrl);
downloadManager.Start(file);
bool isDownloading = true;
while (isDownloading)
{
await Task.Delay(10 * 1000);
isDownloading = IsDownloading(file);
}
});
The IsDownloading method:
bool IsDownloading(IDownloadFile file)
{
if (file == null) return false;
switch (file.Status)
{
case DownloadFileStatus.INITIALIZED:
case DownloadFileStatus.PAUSED:
case DownloadFileStatus.PENDING:
case DownloadFileStatus.RUNNING:
return true;
case DownloadFileStatus.COMPLETED:
case DownloadFileStatus.CANCELED:
case DownloadFileStatus.FAILED:
return false;
default:
throw new ArgumentOutOfRangeException();
}
}
Re: https://github.com/SimonSimCity/Xamarin-CrossDownloadManager/blob/develop/Sample/DownloadExample/Downloader.cs#L46
I don't know why IDownloadFile.Status = COMPLETED not working, but i found solve problem:
await Task.Run(() =>
{
var downloadManager = CrossDownloadManager.Current;
var file = downloadManager.CreateDownloadFile(LinkToFile);
downloadManager.Start(file);
while (file.Status == DownloadFileStatus.INITIALIZED)
{
while (file.TotalBytesExpected > file.TotalBytesWritten)
{
Debug.WriteLine(file.Status);
}
}
});
Somebody know why DownloadFileStatus.INITIALIZED working, but DownloadFileStatus.COMPLETED not?
SushiHangover's answer above worked great, and I combined it with ACR User Dialog's package (https://github.com/aritchie/userdialogs) to show a nice loading progress screen to the user while waiting for the download to complete. This works nicely on Android (I couldn't test iOS yet).
...
var downloadManager = CrossDownloadManager.Current;
var fileToDownload = downloadManager.CreateDownloadFile(args.Url);
downloadManager.Start(fileToDownload, true);
args.Cancel = true;
UserDialogs.Instance.Progress("Downloading").Show();
bool isDownloading = true;
while (isDownloading)
{
await Task.Delay(100);
if (fileToDownload.TotalBytesExpected > 0)
{
UserDialogs.Instance.Progress().PercentComplete = (int)(fileToDownload.TotalBytesWritten / fileToDownload.TotalBytesExpected * 100);
Console.WriteLine(("DOWNLOAD PROGRESS: " + fileToDownload.TotalBytesWritten / fileToDownload.TotalBytesExpected * 100).ToString() + "%");
}
isDownloading = IsDownloading(fileToDownload);
}
UserDialogs.Instance.Progress().Hide();
//Below code opens the download location after download has completed.
Intent intent = new Intent(DownloadManager.ActionViewDownloads);
intent.AddFlags(ActivityFlags.NewTask);
Android.App.Application.Context.StartActivity(intent);
return;
}
}
}
bool IsDownloading(IDownloadFile file)
{
if (file == null) return false;
switch (file.Status)
{
case DownloadFileStatus.INITIALIZED:
case DownloadFileStatus.PAUSED:
case DownloadFileStatus.PENDING:
case DownloadFileStatus.RUNNING:
return true;
case DownloadFileStatus.COMPLETED:
case DownloadFileStatus.CANCELED:
case DownloadFileStatus.FAILED:
return false;
default:
throw new ArgumentOutOfRangeException();
}
}
I use codeigniter 3.0.6 query string like
index.php?d=directoryt&c=controller
index.php?d=directory&c=controller&m=function
How ever having two get methods for directory and controller is a bit long.
Question Is there any way to modify the protected function
_set_routing() function using a MY_Router.php to get it so it will pick up the directory and controller by using one query only like example below.
index.php?route=directory/controller
// If need to get function
index.php?route=directory/controller&m=function
What have tried so far
<?php
class MY_Router extends CI_Router {
protected function _set_routing()
{
// Load the routes.php file. It would be great if we could
// skip this for enable_query_strings = TRUE, but then
// default_controller would be empty ...
if (file_exists(APPPATH.'config/routes.php'))
{
include(APPPATH.'config/routes.php');
}
if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
{
include(APPPATH.'config/'.ENVIRONMENT.'/routes.php');
}
// Validate & get reserved routes
if (isset($route) && is_array($route))
{
isset($route['default_controller']) && $this->default_controller = $route['default_controller'];
isset($route['translate_uri_dashes']) && $this->translate_uri_dashes = $route['translate_uri_dashes'];
unset($route['default_controller'], $route['translate_uri_dashes']);
$this->routes = $route;
}
// Are query strings enabled in the config file? Normally CI doesn't utilize query strings
// since URI segments are more search-engine friendly, but they can optionally be used.
// If this feature is enabled, we will gather the directory/class/method a little differently
if ($this->enable_query_strings)
{
// If the directory is set at this time, it means an override exists, so skip the checks
if ( ! isset($this->directory))
{
$_route = isset($_GET['route']) ? trim($_GET['route'], " \t\n\r\0\x0B/") : '';
if ($_route !== '')
{
echo $_route;
$this->uri->filter_uri($_route);
$this->set_directory($_route);
}
}
// Routing rules don't apply to query strings and we don't need to detect
// directories, so we're done here
return;
}
// Is there anything to parse?
if ($this->uri->uri_string !== '')
{
$this->_parse_routes();
}
else
{
$this->_set_default_controller();
}
}
}
config.php
$config['allow_get_array'] = TRUE;
$config['enable_query_strings'] = TRUE;
$config['controller_trigger'] = 'c';
$config['function_trigger'] = 'm';
$config['directory_trigger'] = 'd';
// Modifyed in MY_Router.php
$config['route'] = 'route';
I have it working
<?php
class MY_Router extends CI_Router {
protected function _set_routing() {
if (file_exists(APPPATH.'config/routes.php'))
{
include(APPPATH.'config/routes.php');
}
if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
{
include(APPPATH.'config/'.ENVIRONMENT.'/routes.php');
}
// Validate & get reserved routes
if (isset($route) && is_array($route))
{
isset($route['default_controller']) && $this->default_controller = $route['default_controller'];
isset($route['translate_uri_dashes']) && $this->translate_uri_dashes = $route['translate_uri_dashes'];
unset($route['default_controller'], $route['translate_uri_dashes']);
$this->routes = $route;
}
if ($this->enable_query_strings) {
if ( ! isset($this->directory))
{
$route = isset($_GET['route']) ? trim($_GET['route'], " \t\n\r\0\x0B/") : '';
if ($route !== '')
{
$part = explode('/', $route);
$this->uri->filter_uri($part[0]);
$this->set_directory($part[0]);
if ( ! empty($part[1])) {
$this->uri->filter_uri($part[1]);
$this->set_class($part[1]);
// Testing function atm
if ( ! empty($_GET['function']))
{
$this->uri->filter_uri($_GET['function']);
$this->set_method($_GET['function']);
}
$this->uri->rsegments = array(
1 => $this->class,
2 => $this->method
);
}
} else {
$this->_set_default_controller();
}
}
// Routing rules don't apply to query strings and we don't need to detect
// directories, so we're done here
return;
}
// Is there anything to parse?
if ($this->uri->uri_string !== '')
{
$this->_parse_routes();
}
else
{
$this->_set_default_controller();
}
}
}
Using the Ace Code Editor can I lock or make readonly a segment of code but still allow other lines of code to be written or edited during a session?
Here is the start of a solution:
$(function() {
var editor = ace.edit("editor1")
, session = editor.getSession()
, Range = require("ace/range").Range
, range = new Range(1, 4, 1, 10)
, markerId = session.addMarker(range, "readonly-highlight");
session.setMode("ace/mode/javascript");
editor.keyBinding.addKeyboardHandler({
handleKeyboard : function(data, hash, keyString, keyCode, event) {
if (hash === -1 || (keyCode <= 40 && keyCode >= 37)) return false;
if (intersects(range)) {
return {command:"null", passEvent:false};
}
}
});
before(editor, 'onPaste', preventReadonly);
before(editor, 'onCut', preventReadonly);
range.start = session.doc.createAnchor(range.start);
range.end = session.doc.createAnchor(range.end);
range.end.$insertRight = true;
function before(obj, method, wrapper) {
var orig = obj[method];
obj[method] = function() {
var args = Array.prototype.slice.call(arguments);
return wrapper.call(this, function(){
return orig.apply(obj, args);
}, args);
}
return obj[method];
}
function intersects(range) {
return editor.getSelectionRange().intersects(range);
}
function preventReadonly(next, args) {
if (intersects(range)) return;
next();
}
});
see it working in this fiddle: http://jsfiddle.net/bzwheeler/btsxgena/
The major working pieces are:
create start and end ace anchors which track the location of a 'readonly' portion as the document around it changes.
create a range to encapsulate the anchors
add a custom keyhandler to check if the current impending keypress will affect the readonly range and cancel it if so.
add custom paste/cut handlers to protect against right-click menu and browser menu cut/paste actions
You can do it by listening to the exec events:
// Prevent editing first and last line of editor
editor.commands.on("exec", function(e) {
var rowCol = editor.selection.getCursor();
if ((rowCol.row === 0) || ((rowCol.row + 1) === editor.session.getLength())) {
e.preventDefault();
e.stopPropagation();
}
});
Source: https://jsfiddle.net/tripflex/y0huvc1b/
I suggest something else easier and more reliable to prevent range to be modified (check it!)
var old$tryReplace = editor.$tryReplace;
editor.$tryReplace = function(range, replacement) {
return intersects(range)?null:old$tryReplace.apply(this, arguments);
}
var session = editor.getSession();
var oldInsert = session.insert;
session.insert = function(position, text) {
return oldInsert.apply(this, [position, outsideRange(position)?text:""]);
}
var oldRemove = session.remove;
session.remove = function(range) {
return intersects(range)?false:oldRemove.apply(this, arguments);
}
var oldMoveText = session.moveText;
session.moveText = function(fromRange, toPosition, copy) {
if (intersects(fromRange) || !outsideRange(toPosition)) return fromRange;
return oldMoveText.apply(this, arguments)
}
outsideRange = function (position) {
var s0 = range.start;
if (position.row < s0.row || (position.row == s0.row && position.column <= s0.column)) return true; // position must be before range.start
var e0 = range.end;
if (position.row > e0.row || (position.row == e0.row && position.column >= e0.column)) return true; // or after range.end
return false;
}
intersects = function(withRange) {
var e = withRange.end, s0 = range.start, s = withRange.start, e0 = range.end;
if (e.row < s0.row || (e.row == s0.row && e.column <= s0.column)) return false; // withRange.end must be before range.start
if (s.row > e0.row || (s.row == e0.row && s.column >= e0.column)) return false; // or withRange.start must be after range.end
return true;
}