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Modify table: How to change 'Allow Nulls' attribute from not null to allow null
...TABLE public.contract_termination_requests
ALTER COLUMN management_company_id DROP NOT NULL;
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Catching an exception while using a Python 'with' statement
... print 'oops'
If you want different handling for errors from the open call vs the working code you could do:
try:
f = open('foo.txt')
except IOError:
print('error')
else:
with f:
print f.readlines()
...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...ltiple updates, and one failure should not stop subsequent updates, simply call rollback() on the Connection when an SQLException is caught. [Anyway I realized this is in-line with the PostgreSQL philosophy of forcing the user to make everything explicit, whereas Oracle has the philosophy of implici...
Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
...he NDK documents. Ever since the release NDK-r6, it has provided a utility called ndk-stack.
Following is the content from official NDK documents with the NDK-r9 tar ball.
Overview:
ndk-stack is a simple tool that allows you to filter stack traces as they appear in the output of 'adb logcat' and ...
Inject errors into already validated form?
... Mostly complete. One extra note is that if is_valid() was not called, then you'll need to set form._errors = ErrorDict()
– jacob
Jan 13 '14 at 17:08
12
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MySQL: Insert record if not exists in table
...actually do what you were attempting:
CREATE TABLE `table_listnames` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
`address` varchar(255) NOT NULL,
`tele` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
Insert a record:
INSERT INTO table_listnames (n...
Postgres: Distinct but only for one column
...re than 1 mio. rows), but I have also many duplicates. I select 3 fields: id , name , metadata .
3 Answers
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Using the Underscore module with Node.js
...from Underscore, it overwrites the _ object with the result of my function call. Anyone know what's going on? For example, here is a session from the node.js REPL:
...
Python's os.makedirs doesn't understand “~” in my path
...
The conversion of ~/some_dir to $HOME/some_dir is called tilde expansion and is a common user interface feature. The file system does not know anything about it.
In Python, this feature is implemented by os.path.expanduser:
my_dir = os.path.expanduser("~/some_dir")
...
Thread.Sleep replacement in .NET for Windows Store
... this (thanks @Brannon for the "slim" hint):
// `waitHandle.Set` is never called, so we wait always until the timeout occurs
using (var waitHandle = new ManualResetEventSlim(initialState: false))
{
waitHandle.Wait(TimeSpan.FromSeconds(5));
}
...