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How to remove constraints from my MySQL table?
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Postgres, MSSQL, and Oracle all have alter table .. drop constraint. MySQL is the odd one out, it seems.
– Jared Beck
Mar 23 '15 at 23:48
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Python element-wise tuple operations like sum
...so that it returns a tuple:
import operator
class stuple(tuple):
def __add__(self, other):
return self.__class__(map(operator.add, self, other))
# obviously leaving out checking lengths
>>> a = stuple([1,2,3])
>>> b = stuple([3,2,1])
>>> a + b
(4, 4,...
Scala equivalent of Java java.lang.Class Object
...ng the same information from an instance of the type.
However, classOf[T] and getClass return slightly different values, reflecting the effect of type erasure on the JVM, in the case of getClass.
scala> classOf[C]
res0: java.lang.Class[C] = class C
scala> c.getClass
res1: java.lang.Class[_] ...
how to mysqldump remote db from local machine
... like to use the mysqldump on my machine to connect to the remote database and do the dump on my machine.
4 Answers
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How to define “type disjunction” (union types)?
...: String => println("str")
case _: Int => println("int")
}
}
And that's it. You can call foo(5) or foo("abc"), and it will work, but try foo(true) and it will fail. This could be side-stepped by the client code by creating a StringOrInt[Boolean], unless, as noted by Randall below, you ...
How to store int[] array in application Settings
... C# express 2008. I'm an experienced C++ developer, but I am pretty much brand new to C# and .NET.
8 Answers
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Function for Factorial in Python
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Easiest way is to use math.factorial (available in Python 2.6 and above):
import math
math.factorial(1000)
If you want/have to write it yourself, you can use an iterative approach:
def factorial(n):
fact = 1
for num in range(2, n + 1):
fact *= num
return fact
o...
How can I get last characters of a string
...th - 1); // => "1"
This gets the characters starting at id.length - 5 and, since the second argument for .substr() is omitted, continues to the end of the string.
You can also use the .slice() method as others have pointed out below.
If you're simply looking to find the characters after the u...
Why does !{}[true] evaluate to true in JavaScript?
{}[true] is [true] and ![true] should be false .
10 Answers
10
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How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
...ynchronized on a static method lock you will synchronize the class methods and attributes ( as opposed to instance methods and attributes )
So your assumption is correct.
I am wondering if making the method synchronized is the right approach to ensure thread-safety.
Not really. You should let your...