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How to perform runtime type checking in Dart?
...ype get runtimeType;
}
Usage:
Object o = 'foo';
assert(o.runtimeType == String);
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How to compare arrays in JavaScript?
...als([1, 2, 1, 2]) === true;
You may say "But it is much faster to compare strings - no loops..." well, then you should note there ARE loops. First recursive loop that converts Array to string and second, that compares two strings. So this method is faster than use of string.
I believe that larger a...
How to make Twitter Bootstrap tooltips have multiple lines?
...ss="example">Show</a>. But it gives this: aaabbbccc (concatenated strings).
– zygimantus
Nov 4 '15 at 12:16
...
Pseudo-terminal will not be allocated because stdin is not a terminal
...hat the remote command is comprised of a syntactically correct, multi-line string.
There are a variety of syntaxes that can be used. For example, since commands can be piped into bash and sh, and probably other shells too, the simplest solution is to just combine ssh shell invocation with heredocs...
How to select a single field for all documents in a MongoDB collection?
...ery. In the result set, only the item and qty fields and, by default, the _id field return in the matching documents.
db.inventory.find( { type: 'food' }, { item: 1, qty: 1 } )
In this example from the folks at Mongo, the returned documents will contain only the fields of item, qty, and _id.
Thus,...
Rails find record with zero has_many records associated [duplicate]
...overflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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How to output something in PowerShell
...The script fetches a web page and checks whether the page's content is the string "OK".
7 Answers
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JUnit 4 compare Sets
...es the Set equals() method.
public class SimpleTest {
private Set<String> setA;
private Set<String> setB;
@Before
public void setUp() {
setA = new HashSet<String>();
setA.add("Testing...");
setB = new HashSet<String>();
setB....
Specify custom Date format for colClasses argument in read.table/read.csv
...
You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses.
Try:
setAs("character","myDate", function(from) as.Date(fr...
How to check if a table contains an element in Lua?
...out that you can't actually use the 'element' as a key, because it's not a string for example, then add a checksum or tostring on it for example, and then use that as the key.
Why do you want to do this? If your tables are very large, the amount of time to iterate through every element will be sig...