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How to chain scope queries with OR instead of AND?
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Just posting the Array syntax for same column OR queries to help peeps out.
Person.where(name: ["John", "Steve"])
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What is the id( ) function used for?
... the data type (I assume that it would be int)?
Because a list is not an array, and a list element is a reference, not an object.
When do we really use id( ) function?
Hardly ever. id() (or its equivalent) is used in the is operator.
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Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
...able to avoid boxing somewhere was with the elements of single-dimensional arrays of primitives. The slight speed benefit here wasn't worth the complexity it added to the entire project, so I took it out.
– P Daddy
Apr 6 '11 at 19:46
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Java String - See if a string contains only numbers and not letters
...401 ops/s
testCharAtIsDigit thrpt 5 8.917 ± 0.767 ops/s
testCharArrayIsDigit thrpt 5 6.553 ± 0.425 ops/s
testPattern thrpt 5 1.287 ± 0.057 ops/s
testIntStreamCodes thrpt 5 0.966 ± 0.051 ops/s
testParseLong thrpt 5 0.174 ± 0.013 ops/s
testParse...
Dictionary returning a default value if the key does not exist [duplicate]
...;
}
public void CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex) {
dictionary.CopyTo(array, arrayIndex);
}
public bool Remove(KeyValuePair<TKey, TValue> item) {
return dictionary.Remove(item);
}
public i...
How to serialize an object into a string
... = new ObjectInputStream(
new ByteArrayInputStream( data ) );
Object o = ois.readObject();
ois.close();
return o;
}
/** Write the object to a Base64 string. */
private static String toString( Serializable o ) throws IOExc...
jQuery how to find an element based on a data-attribute value?
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Don't forget to treat it as an array. Use [0] to access the first element found.
– Aminah Nuraini
Jun 1 '16 at 17:06
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@UniqueConstraint annotation in Java
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Note: In Kotlin the syntax for declaring the arrays in annotations uses arrayOf(...) instead of {...}
@Entity
@Table(uniqueConstraints=arrayOf(UniqueConstraint(columnNames=arrayOf("book", "chapter_number"))))
class Chapter(@ManyToOne var book:Book,
@Colum...
Is null reference possible?
...ces the null pointer. I've seen people argue seriously that &a[size_of_array] can't and shouldn't be relied upon, and anyway it is easier and safe to just write a + size_of_array.
– Karl Knechtel
Dec 6 '10 at 9:08
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Why is there no Tree class in .NET?
... they get the answer: "What would you want from such an implementation? An array? A linked list? A queue? A dictionary?" I think this is a non sequitur answer.
– rymdsmurf
Apr 18 '16 at 6:32
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