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Add primary key to existing table
...aint and recreate it
alter table Persion drop CONSTRAINT <constraint_name>
alter table Persion add primary key (persionId,Pname,PMID)
edit:
you can find the constraint name by using the query below:
select OBJECT_NAME(OBJECT_ID) AS NameofConstraint
FROM sys.objects
where OBJECT_NAME(pare...
How do I sort a Set to a List in Java?
...a, I have a Set , and I want to turn it into a sorted List . Is there a method in the java.util.Collections package that will do this for me?
...
Checking if sys.argv[x] is defined
...nificant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'option']
args = dict(zip(arg_names, sys.argv))
You could even use it to generate a namedtuple with values that default to None...
How do I hide an element when printing a web page?
...
In your stylesheet add:
@media print
{
.no-print, .no-print *
{
display: none !important;
}
}
Then add class='no-print' (or add the no-print class to an existing class statement) in your HTML that you don't want to appear in...
Overloading and overriding
...
Overloading
Overloading is when you have multiple methods in the same scope, with the same name but different signatures.
//Overloading
public class test
{
public void getStuff(int id)
{}
public void getStuff(string name)
{}
}
Overriding
Overriding is a...
Copy / Put text on the clipboard with FireFox, Safari and Chrome
...t to access the clipboard. How can I do that in FireFox, Safari and/or Chrome?
19 Answers
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
...mpty string
(_)+ : any sequence of spaces that matches none of the above, meaning it's in the middle
Match and replace with $1, which captures a single space
See also
regular-expressions.info/Anchors
share
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Windows: XAMPP vs WampServer vs EasyPHP vs alternative [closed]
...a bit more work, yes; but knowing how to install and configure your environment is great -- and useful.
The first time, you'll need maybe half a day or a day to configure those. But, at least, you'll know how to do so.
And the next times, things will be far more easy, and you'll need less time.
E...
How can I distinguish whether Switch,Checkbox Value is changed by user or programmatically (includin
How to implement method isNotSetByUser() ?
16 Answers
16
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Save plot to image file instead of displaying it using Matplotlib
...enerate plots on the fly. I am using the code below (from Matplotlib documentation) as a starting point:
20 Answers
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