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Get list of a class' instance methods
...
You actually want TestClass.instance_methods, unless you're interested in what TestClass itself can do.
class TestClass
def method1
end
def method2
end
def method3
end
end
TestClass.methods.grep(/method1/) # => []
TestClass....
Macro vs Function in C
...roper use (mostly useful for debug builds).
Inspect input args, You can do tests on input args such as checking their type, sizeof, check struct members are present before casting(can be useful for polymorphic types).Or check an array meets some length condition.see: https://stackoverflow.com/a/2992...
Can Selenium interact with an existing browser session?
...
In case anyone needs it, I have tried and tested some Java code to make selenium use an existing browser session - stackoverflow.com/a/51145789/6648326.
– MasterJoe
Jul 9 '18 at 1:40
...
What's the $unwind operator in MongoDB?
...m",
"XL",
"free"
]
}
Query -- db.test1.aggregate( [ { $unwind : "$sizes" } ] );
output
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "medium" }
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "XL" }
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "free"...
How to read a single char from the console in Java (as the user types it)?
...
How heavily has this been tested/stress-tested?
– Fund Monica's Lawsuit
May 15 '16 at 5:01
2
...
Attach parameter to button.addTarget action in Swift
...
Swift 4.2
Result:
testButton.on(.touchUpInside) { (sender, event) in
// You can use any reference initialized before the code block here
// You can access self by adding [weak self] before (sender, event)
// You can then either mak...
How do I break out of a loop in Scala?
...ral options.
(1a) Use some construct that includes a conditional that you test.
var sum = 0
(0 to 1000).iterator.takeWhile(_ => sum < 1000).foreach(i => sum+=i)
(warning--this depends on details of how the takeWhile test and the foreach are interleaved during evaluation, and probably sh...
How do I select a random value from an enumeration?
...GetValues (typeof (T));
return (T) v.GetValue (_R.Next(v.Length));
}
Test:
for (int i = 0; i < 10; i++) {
var value = RandomEnumValue<System.DayOfWeek> ();
Console.WriteLine (value.ToString ());
}
->
Tuesday
Saturday
Wednesday
Monday
Friday
Saturday
Saturday
Saturday
Fr...
How do you check if a JavaScript Object is a DOM Object?
...on't have HTMLElement and
//an exception is thrown and we end up here. Testing some
//properties that all elements have (works on IE7)
return (typeof obj==="object") &&
(obj.nodeType===1) && (typeof obj.style === "object") &&
(typeof obj.ownerDocument ...
pandas GroupBy columns with NaN (missing) values
...3),
[1] * (2 * 3)]
col_names = ['col_a', 'col_b', 'value']
test_df = pd.DataFrame(data_block, index=col_names).T
grouped_df = safe_groupby(test_df, ['col_a', 'col_b'],
OrderedDict([('value', 'sum')]))
This will return the successful result without having ...