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What do REFRESH and MERGE mean in terms of databases?
... means "pull any state changes from the database into my representation". Cascading this is simple; it means that all associated entities are refreshed.
MERGE means something complex that approximates "save" but is more like "push this detached entity back into managed status and save its state ch...
Possible to access the index in a Hash each loop?
...
specifically: hash.each_with_index { |(key,value),index| ... }
– rampion
Jan 18 '10 at 2:42
22
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Concatenate strings in Less
I think this is not possible, but I thought I ask in case there is a way. The idea is that I have a variable for path to web resource folder:
...
Jquery to change form action
I have two buttons in a form and two different pages have to be called when they are clicked. when button1 is clicked then page1 must be loaded and when button2 is clicked then page2 must be loaded. i know how to do this in javascript but i have no clue about how to do this in jquery.Can any one he...
Assigning default value while creating migration file
Ok I use above line to create migration file that automatically generates code in the generated file to add a column to a model Tweet with datatype integer. Now I want to add default value to the added column while generating the migration file. Is that possible? I googled it but couldn't find. Guys...
Prevent ViewPager from destroying off-screen views
...r of offscreen pages to use, rather than the default which is 1.
In your case, you want to specify 2, so that when you are on the third page, the first one is not destroyed, and vice-versa.
mViewPager = (ViewPager)findViewById(R.id.pager);
mViewPager.setOffscreenPageLimit(2);
...
Unittest setUp/tearDown for several tests
...respectively. Alternatively, if you have a group of them in one file, you can use setUpModule and tearDownModule (documentation).
Otherwise your best bet is probably going to be to create your own derived TestSuite and override run(). All other calls would be handled by the parent, and run would ...
Postgresql: Conditionally unique constraint
...esn't define a partial (i.e. conditional) UNIQUE constraint - however, you can create a partial unique index. PostgreSQL uses unique indexes to implement unique constraints, so the effect is the same, you just won't see the constraint listed in information_schema.
CREATE UNIQUE INDEX stop_myc ON st...
Collections.emptyList() returns a List?
...ded it with the type, so it defaults to returning List<Object>. You can supply the type parameter, and have your code behave as expected, like this:
public Person(String name) {
this(name,Collections.<String>emptyList());
}
Now when you're doing straight assignment, the compiler ca...
Git: copy all files in a directory from another branch
How do I copy all files in a directory from another branch? I can list all of the files in that directory by doing
2 Answe...