I currently have data like this:
_classes = _items.map((e) => e.ClassID).toSet();
print(_classes);
{One, Two} // output
and I am trying to achieve data look like this:
{'One', 'Two'}
But I can't solve it. Any suggestions why is that?
I already got it after hours of trying and trying different codes.
Set<String> _classes;
_classes = _items.map((e) => e.ClassID.toString()).toSet();
The .toString() part is the one that I am looking for.
Related
Currently I'm working in a project with flutter, but I realize there is a need in the management of the variables I'm using.
Basically I want to delete the last character of a string I'm concatenating, something like this:
string varString = 'My text'
And with the help of some method or function, the result I get:
'My tex'
Am I clear about it? I'm looking for some way which helps me to 'pop' the last character of a text (like pop function in javascript)
Is there something like that? I search in the Dart docs, but I didn't find anything about it.
Thank you in advance.
You can take a substring, like this:
string.substring(0, string.length - 1)
If you need the last character before popping, you can do this:
string[string.length - 1]
Strings in dart are immutable, so the only way to do the operation you are describing is by constructing a new instance of a string, as described above.
var str = 'My text';
var newStr = (str.split('')..removeLast()).join();
print(newStr);
Another way:
var newStr2 = str.replaceFirst(RegExp(r'.$') , '');
print(newStr2);
I would like to remove punctuation mark and make the lowercase letters in RDD?
Below is my data set
l=sc.parallelize(["How are you","Hello\ then% you"\
,"I think he's fine+ COMING"])
I tried below function but I got an error message
punc='!"#$%&\'()*+,-./:;<=>?#[\\]^_`{|}~'
def lower_clean_str(x):
lowercased_str = x.lower()
clean_str = lowercased_str.translate(punc)
return clean_str
one_RDD = l.flatMap(lambda x: lower_clean_str(x).split())
one_RDD.collect()
But this gives me an error. What might be the problem? How can I fix this?
Thank you.
You are using the python translate function in a wrong way.
As I am not sure if you are using python 2.7 or python 3, I am suggesting an alternate approach.
The translate function changes a bit in python 3.
The following code will work irrespective of the python version.
def lower_clean_str(x):
punc='!"#$%&\'()*+,-./:;<=>?#[\\]^_`{|}~'
lowercased_str = x.lower()
for ch in punc:
lowercased_str = lowercased_str.replace(ch, '')
return lowercased_str
l=sc.parallelize(["How are you","Hello\ then% you","I think he's fine+ COMING"])
one_RDD = l.map(lower_clean_str)
one_RDD.collect()
Output :
['how are you', 'hello then you', 'i think hes fine coming']
Well, the question is very self-explanatory.
Right now, I'm front of a form which has a select tag with a couple of options already. But I must insert a new one, with a different value that I will receive from a .json file.
The thing is: I haven't been able to find a suitable solution from the CasperJS documentation.
I've tried something like this:
this.fill('form.coworkerdiscountcode', {
'CoworkerDiscountCode.DiscountCode': ['Value1']
});
But no results. Any ideas?
Thanks in advance.
You can execute any javascript code by passing it to casper.evaluate like this:
casper.evaluate(function() {
var x = document.getElementById("coworkerdiscountcode");
var option = document.createElement("option");
option.text = "Kiwi";
x.add(option);
});
I have a step in my scenario that fills in multiple text fields and selects options from a dropdown. I want to assert that the text entered and the option selected was correct for each.
expect(action1).to.eventually.have.string('some text').and.notify(callback);
expect(action2).to.eventually.have.string('some text').and.notify(callback);
expect(action3).to.eventually.have.string('some text').and.notify(callback);
The problem I'm encountering is that the if the first or second expect actions pass then any following actions will not get executed leading to false positives.
Ideally I'm looking for a means to notify without the callback until the last expect. Anyone know how this might be done?
I actually found an answer in another StackOverflow question that I did not notice initially.
How does one use Q.all with chai-as-promised?
using Q it would look like this:
var Q = require('q');
var chai = require('chai');
var expect = chai.expect;
var should = chai.should();
Q.all([
expect(action1).to.eventually.have.string('some text'),
expect(action2).to.eventually.have.string('some text'),
expect(action3).to.eventually.have.string('some text'),
]).should.notify(callback);
I have a requirement to convert the output of cypher into JSON.
Here is my code snippet.
RestCypherQueryEngine rcqer=new RestCypherQueryEngine(restapi);
String nodeN = "MATCH n=(Company) WITH COLLECT(n) AS paths RETURN EXTRACT(k IN paths | LAST(nodes(k))) as lastNode";
final QueryResult<Map<String,Object>> queryResult = rcqer.query(searchQuery);
for(Map<String,Object> row:queryResult)
{
System.out.println((ArrayList)row.get("lastNode"));
}
Output:
[http://XXX.YY6.192.103:7474/db/data/node/445, http://XXX.YY6.192.103:7474/db/data/node/446, http://XXX.YY6.192.103:7474/db/data/node/447, http://XXX.YY6.192.103:7474/db/data/node/448, http://XXX.YY6.192.103:7474/db/data/node/449, http://XXX.YY6.192.103:7474/db/data/node/450, http://XXX.YY6.192.103:7474/db/data/node/451, http://XXX.YY6.192.103:7474/db/data/node/452, http://XXX.YY6.192.103:7474/db/data/node/453]
I am not able to see the actual data (I am getting URL's). I am pretty sure I am missing something here.
I would also like to convert the output to JSON.
The cypher works in my browser interface.
I looked at various articles around this:
Java neo4j, REST and memory
Neo4j Cypher: How to iterate over ExecutionResult result
Converting ExecutionResult object to json
The last 2 make use of EmbeddedDatabase which may not be possible in my scenario (as the Neo is hosted in another cloud, hence the usage of REST).
Thanks.
Try to understand what you're doing? Your query does not make sense at all.
Perhaps you should re-visit the online course for Cypher: http://neo4j.com/online-course
MATCH n=(Company) WITH COLLECT(n) AS paths RETURN EXTRACT(k IN paths | LAST(nodes(k))) as lastNode
you can just do:
MATCH (c:Company) RETURN c
RestCypherQueryEngine rcqer=new RestCypherQueryEngine(restapi);
final QueryResult<Map<String,Object>> queryResult = rcqer.query(query);
for(Node node : queryResult.to(Node.class))
{
for (String prop : node.getPropertyKeys()) {
System.out.println(prop+" "+node.getProperty(prop));
}
}
I think it's better to use the JDBC driver for what you try to do, and also actually return the properties you're trying to convert to JSON.