I have the following string https://www.something.com/api/mmmm/media/mhm/something.jpg and I want to trim this string to become https://www.something.com/media/mhm/something.jpg essentially I want it to be dynamic so I don't want to hardcode it because the URL won't be the same forever this particular part will change. Put it another way I want to remove everything from /api/ till it reaches to /media/ and I don't seem to be able to do it.
You can use Uri.parse to parse the url and the loop the pathSegments of the uri create a new uri with the pathSegments that you mish to keep, such as:
void main() {
var uri =
Uri.parse('https://www.something.com/api/mmmm/media/mhm/something.jpg');
var exclude = false;
var newPath = <String>[];
for (var seg in uri.pathSegments) {
if (seg == 'api') {
exclude = true;
continue;
}
if (seg == 'media') {
exclude = false;
}
if (!exclude) {
newPath.add(seg);
}
}
var newUri = uri.replace(pathSegments: newPath);
print(newUri); //Prints https://www.something.com/media/mhm/something.jpg
}
An alternative solution would be use a RegExp like this:
void main() {
print(
trimString('https://www.something.com/api/mmmm/media/mhm/something.jpg'));
// https://www.something.com/media/mhm/something.jpg
print(trimString(
'https://www.something.com/api/AlotOfStrangeThings/complateNonsense/&&&&&/media/mhm/something.jpg'));
// https://www.something.com/media/mhm/something.jpg
}
String trimString(String string) =>
string.replaceAll(RegExp(r'/api/(.*)/media/'), '/media/');
Related
Let say we have an object:
#:checkDirty
class Test {
var a:Int;
var b(default, default):String;
var c(get, set):Array<Int>;
public function new() {
...
}
public function get_c() {
...
}
public function set_c(n) {
...
}
}
Could we write a macro checkDirty so that any change to field/properties would set property dirty to true. Macro would generate dirty field as Bool and clearDirty function to set it to false.
var test = new Test();
trace(test.dirty); // false
test.a = 12;
trace(test.dirty); // true
test.clearDirty();
trace(test.dirty); //false
test.b = "test"
trace(test.dirty); //true
test.clearDirty();
test.c = [1,2,3];
trace(test.dirty); //true
Just to note - whenever you consider proxying access to an object, in my experience, there are always hidden costs / added complexity. :)
That said, you have a few approaches:
First, if you want it to be pure Haxe, then either a macro or an abstract can get the job done. Either way, you're effectively transforming every property access into a function call that sets the value and also sets dirty.
For example, an abstract using the #:resolve getter and setter can be found in the NME source code, replicated here for convenience:
#:forward(decode,toString)
abstract URLVariables(URLVariablesBase)
{
public function new(?inEncoded:String)
{
this = new URLVariablesBase(inEncoded);
}
#:resolve
public function set(name:String, value:String) : String
{
return this.set(name,value);
}
#:resolve
public function get(name:String):String
{
return this.get(name);
}
}
This may be an older syntax, I'm not sure... also look at the operator overloading examples on the Haxe manual:
#:op(a.b) public function fieldRead(name:String)
return this.indexOf(name);
#:op(a.b) public function fieldWrite(name:String, value:String)
return this.split(name).join(value);
Second, I'd just point out that if the underlying language / runtime supports some kind of Proxy object (e.g. JavaScript Proxy), and macro / abstract isn't working as expected, then you could build your functionality on top of that.
I wrote a post (archive) about doing this kind of thing (except for emitting events) before - you can use a #:build macro to modify class members, be it appending an extra assignment into setter or replacing the field with a property.
So a modified version might look like so:
class Macro {
public static macro function build():Array<Field> {
var fields = Context.getBuildFields();
for (field in fields.copy()) { // (copy fields so that we don't go over freshly added ones)
switch (field.kind) {
case FVar(fieldType, fieldExpr), FProp("default", "default", fieldType, fieldExpr):
var fieldName = field.name;
if (fieldName == "dirty") continue;
var setterName = "set_" + fieldName;
var tmp_class = macro class {
public var $fieldName(default, set):$fieldType = $fieldExpr;
public function $setterName(v:$fieldType):$fieldType {
$i{fieldName} = v;
this.dirty = true;
return v;
}
};
for (mcf in tmp_class.fields) fields.push(mcf);
fields.remove(field);
case FProp(_, "set", t, e):
var setter = Lambda.find(fields, (f) -> f.name == "set_" + field.name);
if (setter == null) continue;
switch (setter.kind) {
case FFun(f):
f.expr = macro { dirty = true; ${f.expr}; };
default:
}
default:
}
}
if (Lambda.find(fields, (f) -> f.name == "dirty") == null) fields.push((macro class {
public var dirty:Bool = false;
}).fields[0]);
return fields;
}
}
which, if used as
#:build(Macro.build())
#:keep class Some {
public function new() {}
public var one:Int;
public var two(default, set):String;
function set_two(v:String):String {
two = v;
return v;
}
}
Would emit the following JS:
var Some = function() {
this.dirty = false;
};
Some.prototype = {
set_two: function(v) {
this.dirty = true;
this.two = v;
return v;
}
,set_one: function(v) {
this.one = v;
this.dirty = true;
return v;
}
};
In python, I often use strings as templates, e.g.
templateUrl = '{host}/api/v3/{container}/{resourceid}'
params = {'host': 'www.api.com', 'container': 'books', 'resourceid': 10}
api.get(templateUrl.format(**params))
This allows for easy base class setup and the like. How can I do the same in dart?
I'm assuming I will need to create a utility function to parse the template and substitute manually but really hoping there is something ready to use.
Perhaps a TemplateString class with a format method that takes a Map of name/value pairs to substitute into the string.
Note: the objective is to have a generic "format" or "interpolation" function that doesn't need to know in advance what tags or names will exist in the template.
Further clarification: the templates themselves are not resolved when they are set up. Specifically, the template is defined in one place in the code and then used in many other places.
Dart does not have a generic template string functionality that would allow you to insert values into your template at runtime.
Dart only allows you to interpolate strings with variables using the $ syntax in strings, e.g. var string = '$domain/api/v3/${actions.get}'. You would need to have all the variables defined in your code beforehand.
However, you can easily create your own implementation.
Implementation
You pretty much explained how to do it in your question yourself: you pass a map and use it to have generic access to the parameters using the [] operator.
To convert the template string into something that is easy to access, I would simply create another List containing fixed components, like /api/v3/ and another Map that holds generic components with their name and their position in the template string.
class TemplateString {
final List<String> fixedComponents;
final Map<int, String> genericComponents;
int totalComponents;
TemplateString(String template)
: fixedComponents = <String>[],
genericComponents = <int, String>{},
totalComponents = 0 {
final List<String> components = template.split('{');
for (String component in components) {
if (component == '') continue; // If the template starts with "{", skip the first element.
final split = component.split('}');
if (split.length != 1) {
// The condition allows for template strings without parameters.
genericComponents[totalComponents] = split.first;
totalComponents++;
}
if (split.last != '') {
fixedComponents.add(split.last);
totalComponents++;
}
}
}
String format(Map<String, dynamic> params) {
String result = '';
int fixedComponent = 0;
for (int i = 0; i < totalComponents; i++) {
if (genericComponents.containsKey(i)) {
result += '${params[genericComponents[i]]}';
continue;
}
result += fixedComponents[fixedComponent++];
}
return result;
}
}
Here would be an example usage, I hope that the result is what you expected:
main() {
final templateUrl = TemplateString('{host}/api/v3/{container}/{resourceid}');
final params = <String, dynamic>{'host': 'www.api.com', 'container': 'books', 'resourceid': 10};
print(templateUrl.format(params)); // www.api.com/api/v3/books/10
}
Here it is as a Gist.
Here is my solution:
extension StringFormating on String {
String format(List<String> values) {
int index = 0;
return replaceAllMapped(new RegExp(r'{.*?}'), (_) {
final value = values[index];
index++;
return value;
});
}
String formatWithMap(Map<String, String> mappedValues) {
return replaceAllMapped(new RegExp(r'{(.*?)}'), (match) {
final mapped = mappedValues[match[1]];
if (mapped == null)
throw ArgumentError(
'$mappedValues does not contain the key "${match[1]}"');
return mapped;
});
}
}
This gives you a very similar functionality to what python offers:
"Test {} with {}!".format(["it", "foo"]);
"Test {a} with {b}!".formatWithMap({"a": "it", "b": "foo"})
both return "Test it with foo!"
It's even more easy in Dart. Sample code below :
String host = "www.api.com"
String container = "books"
int resourceId = 10
String templateUrl = "$host/api/v3/$container/${resourceId.toString()}"
With the map, you can do as follows :
Map<String, String> params = {'host': 'www.api.com', 'container': 'books', 'resourceid': 10}
String templateUrl = "${params['host']}/api/v3/${params['container']}/${params['resourceId']}"
Note : The above code defines Map as <String, String>. You might want <String, Dynamic> (and use .toString())
Wouldn't it be simplest to just make it a function with named arguments? You could add some input validation if you wanted to.
String templateUrl({String host = "", String container = "", int resourceid = 0 }) {
return "$host/api/v3/$container/$resourceId";
}
void main() {
api.get(templateUrl(host:"www.api.com", container:"books", resourceid:10));
}
I'm running the Microsoft sample for Bing Entity Search using the SDK and (NOT the REST API.) I can.t figure out how to enter the location key/value pair, based on this documentation:
https://learn.microsoft.com/en-us/dotnet/api/microsoft.azure.cognitiveservices.search.entitysearch.entitiesoperationsextensions.search?f1url=https%3A%2F%2Fmsdn.microsoft.com%2Fquery%2Fdev15.query%3FappId%3DDev15IDEF1%26l%3DEN-US%26k%3Dk(Microsoft.Azure.CognitiveServices.Search.EntitySearch.EntitiesOperationsExtensions.Search);k(TargetFrameworkMoniker-.NETFramework,Version%3Dv4.7.2);k(DevLang-csharp)%26rd%3Dtrue&view=azure-dotnet
I would like to continue to use named parameters so I can still do this:
var restaurants = client.Entities.Search(query: currentQuery, location: lat:? long:?);
The method with the query and location from the Microsoft sample will look like this:
public static void MultipleCurrentQueryLookup(string subscriptionKey)
{
var client = new EntitySearchClient(new ApiKeyServiceClientCredentials subscriptionKey));
try
{
string currentQuery = Settings1.Default.CurrentQuery;
var restaurants = client.Entities.Search(query: currentQuery,
location: "lat:47.623, long:-122.361, re:380m");
if (restaurants?.Places?.Value?.Count > 0)
{
// get all the list items that relate to this query
var listItems = restaurants.Places.Value.Where(thing => thing.EntityPresentationInfo.EntityScenario == EntityScenario.ListItem).ToList();
if (listItems?.Count > 0)
{
var sb = new StringBuilder();
foreach (var item in listItems)
{
var place = item as Place;
if (place == null)
{
Console.WriteLine("Unexpectedly found something that isn't a place named \"{0}\"", item.Name);
continue;
}
sb.AppendFormat(",{0} ({1}) {2}", place.Name, place.Telephone, place.Url);
}
Console.WriteLine("Ok, we found these places: ");
Console.WriteLine(sb.ToString().Substring(1));
}
else
{
Console.WriteLine("Couldn't find any relevant results for \"The Current Query\"");
}
}
else
{
Console.WriteLine("Didn't see any data..");
}
}
catch (ErrorResponseException ex)
{
Console.WriteLine("Encountered exception. " + ex.Message);
}
}
I am fetching data from sharepoint list for a multi line column.
And then split the data by space and comparing it to other string but despite the value in both the strings being same it gives false result.
Please follow the below code:
string[] strBodys = SPHttpUtility.ConvertSimpleHtmlToText(Convert.ToString(workflowProperties.ListItem[SCMSConstants.lstfldBody]), Convert.ToString(workflowProperties.ListItem[SCMSConstants.lstfldBody]).Length).Split(' ');
bool hasKwrdInBody = false;
foreach (SPItem oItem in oColl)
{//get all the keywords
string[] strkeyWrds = SPHttpUtility.ConvertSimpleHtmlToText(Convert.ToString(oItem[SCMSConstants.lstfldKWConfigKeywordsIntrName]), Convert.ToString(oItem[SCMSConstants.lstfldKWConfigKeywordsIntrName]).Length).Split(',');
//in body
foreach (string strKW in strkeyWrds)
{
string KWValue = strKW.Trim(' ').ToLower();
foreach (string strBdy in strBodys)
{
string BodyValue = strBdy.Trim(' ').ToLower();
//if (strKW.ToLower().Equals(strBdy.ToLower()))
if(KWValue == BodyValue) //here it always gives false result
{
hasKwrdInBody = true;
break;
}
}
if (hasKwrdInBody)
break;
}
if (!hasKwrdInSbjct && !hasKwrdInBody)
{
continue;
}
else
{
//set business unit to current groups rule
bsnsUnitLookupFld = new SPFieldLookupValue(Convert.ToString(oItem[SCMSConstants.lstfldBsnsUnit]));
asgndTo = new SPFieldUserValue(objWeb,Convert.ToString(oItem[SCMSConstants.lstfldKWConfigAssignedToIntrName])).User;
groupName = Convert.ToString(oItem[SCMSConstants.lstfldKWConfigAssignedToGroupIntrName]).Split('#').Last();
break;
}
}
Please mind that i am trying to get multi line text from sharepoint list
Please provide your suggestions.
That also depends on the exact type of your Multiline field (e.g Plain Text or RichText, etc.).
Maybe it would be clear if you just added some logging writing out the values you are comparing.
For details on how to get the value of a Multiline textfield check Accessing Multiple line of text programmatically
and here for RichText
I got it working by comparing and counting the characters in both the strings. Actually some UTC codes were embedded in to the string. First I removed those characters using regular expression and then compared them and it worked like a charm.
Here is the code snippet, might help some one.
string[] strBodys = SPHttpUtility.ConvertSimpleHtmlToText(Convert.ToString(workflowProperties.ListItem[SCMSConstants.lstfldBody]), Convert.ToString(workflowProperties.ListItem[SCMSConstants.lstfldBody]).Length).Split(' ');
bool hasKwrdInBody = false;
foreach (SPItem oItem in oColl)
{//get all the keywords
string[] strkeyWrds = SPHttpUtility.ConvertSimpleHtmlToText(Convert.ToString(oItem[SCMSConstants.lstfldKWConfigKeywordsIntrName]), Convert.ToString(oItem[SCMSConstants.lstfldKWConfigKeywordsIntrName]).Length).Split(',');
//in body
foreach (string strKW in strkeyWrds)
{
string KWValue = strKW.Trim(' ').ToLower();
KWValue = Regex.Replace(KWValue, #"[^\u0000-\u007F]", string.Empty); //here replaced the utc codes
foreach (string strBdy in strBodys)
{
string BodyValue = strBdy.Trim(' ').ToLower();
BodyValue = Regex.Replace(BodyValue, #"\t|\n|\r", string.Empty); // new code to replace utc code
BodyValue = Regex.Replace(BodyValue, #"[^\u0000-\u007F]", string.Empty); //new code to replace utc code
//if (strKW.ToLower().Equals(strBdy.ToLower()))
if(KWValue == BodyValue) //here it always gives false result
{
hasKwrdInBody = true;
break;
}
}
if (hasKwrdInBody)
break;
}
if (!hasKwrdInSbjct && !hasKwrdInBody)
{
continue;
}
else
{
//set business unit to current groups rule
bsnsUnitLookupFld = new SPFieldLookupValue(Convert.ToString(oItem[SCMSConstants.lstfldBsnsUnit]));
asgndTo = new SPFieldUserValue(objWeb,Convert.ToString(oItem[SCMSConstants.lstfldKWConfigAssignedToIntrName])).User;
groupName = Convert.ToString(oItem[SCMSConstants.lstfldKWConfigAssignedToGroupIntrName]).Split('#').Last();
break;
}
}
function clickButtonHandler(event:MouseEvent):void
{
var message:Object = new Object();
message.text = txtMessage.text;
message.userName = txtUser.text;
//Posts to this swf
showMessage(message);
//Posts to ALL OTHER swf files..
group.post(message);
}
function showMessage(message:Object):void
{
output_txt.appendText(message.userName+": "+message.text + "\n");
}
function jsalertwindow(event:MouseEvent):void
{
var alert:URLRequest = new URLRequest("javascript:alert('Please enter your User name')");
navigateToURL(alert, "_self");
}
As you can see there are two function which are contain mouseevent. I want to send those function with an if-else statement. If user write something in text input component which name is txtUser and,
send_btn.addEventListener(MouseEvent.CLICK, clickButtonHandler);
will work, else(if the user forget writing anything)
send_btn.addEventListener(MouseEvent.CLICK, jsalertwindow);
will work.
And one more question should i use MouseEvent.CLICK or MouseEvent.MOUSE_DOWN? Thanks for your advice.
Assign a single handler to the button click (MouseEvent.CLICK is the right event to use) and check the field is populated in the handler:
function clickButtonHandler(event:MouseEvent):void
{
var message:Object = new Object();
// Check the field is populated
if (txtUser.text != "")
{
message.text = txtMessage.text;
message.userName = txtUser.text;
showMessage(message);
//Posts to ALL OTHER swf files..
group.post(message);
}
else
{
// Nothing in the input field, show the alert
showAlert();
}
}
function showMessage(message:Object):void
{
output_txt.appendText(message.userName+": "+message.text + "\n");
}
function showAlert():void
{
var alert:URLRequest = new URLRequest("javascript:alert('Please enter your User name')");
navigateToURL(alert, "_self");
}