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How do you express binary literals in Python?
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This is interesting for when you have strings, but if working with pure numbers, you add unnecessary computations to the code.
– Daniel Möller
Aug 18 '17 at 17:34
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How to simplify a null-safe compareTo() implementation?
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Using Java 8:
private static Comparator<String> nullSafeStringComparator = Comparator
.nullsFirst(String::compareToIgnoreCase);
private static Comparator<Metadata> metadataComparator = Comparator
.comparing(Metadata::getName, nullSafeStri...
Easy pretty printing of floats in python?
...ise numbers, but get rid of trailing zeros for example, use the formatting string %g:
np.set_printoptions(formatter={"float_kind": lambda x: "%g" % x})
For just printing once and not changing global behavior, use np.array2string with the same arguments as above.
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Stop Mongoose from creating _id property for sub-document array items
...t declaration.
var schema = new mongoose.Schema({
field1:{
type:String
},
subdocArray:[{
_id:false,
field :{type:String}
}]
});
This will prevent the creation of an _id field in your subdoc.
Tested in Mongoose v5.9.10
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Can a java file have more than one class?
...s to be a nested class.
public class first {
public static void main(String[] args) {
// TODO Auto-generated method stub
}
public class demo1
{
public class demo2
{
}
}
}
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What reason is there to use null instead of undefined in JavaScript?
...mply stuff like if(x) ... . Stop it. !x will evaluate to true for an empty string, 0, null, NaN - ie things you probably don't want. If you want to write javascript that isn't awful, always use triple equals === and never use null (use undefined instead). It'll make your life way easier.
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Difference between .on('click') vs .click()
...ar shortcut methods for "keyup", "focus", etc.)
The reason I'm posting an extra answer is to mention what happens if you call .click() with no parameters:
$("#whatever").click();
// is a shortcut for
$("#whatever").trigger("click");
Noting that if you use .trigger() directly you can also pass ex...
Why do we need virtual functions in C++?
... virtual modifier on/off to see what happens
//virtual
std::string Says() { return "?"; }
};
class Dog: public Animal
{
public: std::string Says() { return "Woof"; }
};
void test()
{
Dog* d = new Dog();
Animal* a = d; // refer to Dog instance with Animal pointer
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Serving static files with Sinatra
... File.read(File.join('public', 'index.html'))
end
Routes should return a String which become the HTTP response body. File.read opens a file, reads the file, closes the file and returns a String.
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Where IN clause in LINQ [duplicate]
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this will compare string values, but what about ids??
– Jitendra Pancholi
Feb 22 '13 at 7:32
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