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Retrieve list of tasks in a queue in Celery
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When specifying the worker I had to use a list as argument: inspect(['celery@Flatty']). Huge speed improvement over inspect().
– Adversus
Dec 14 '15 at 12:46
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Add a column to existing table and uniquely number them on MS SQL Server
...cy database and write a procedure by which I can assign each record a different value. Something like adding a column and autogenerate the data for it.
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Mercurial — revert back to old version and continue from there
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hg update [-r REV]
If later you commit, you will effectively create a new branch. Then you might continue working only on this branch or eventually merge the existing one into it.
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Check if all elements in a list are identical
...lso one-liner:
def checkEqual3(lst):
return lst[1:] == lst[:-1]
The difference between the 3 versions are that:
In checkEqual2 the content must be hashable.
checkEqual1 and checkEqual2 can use any iterators, but checkEqual3 must take a sequence input, typically concrete containers like a lis...
Why does the Scala compiler disallow overloaded methods with default arguments?
... naming-scheme for the
generated methods which return default arguments. If you write
def f(a: Int = 1)
the compiler generates
def f$default$1 = 1
If you have two overloads with defaults on the same parameter
position, we would need a different naming scheme. But we want to k...
How to insert an element after another element in JavaScript without using a library?
...Sibling);
Where referenceNode is the node you want to put newNode after. If referenceNode is the last child within its parent element, that's fine, because referenceNode.nextSibling will be null and insertBefore handles that case by adding to the end of the list.
So:
function insertAfter(newNode...
How can you find the height of text on an HTML canvas?
...Ascent and tmDescent returned by Win32's GetTextMetric API. This is needed if you want to do a word-wrapped run of text with spans in different fonts/sizes.
The above image was generated on a canvas in Safari, red being the top line where the canvas was told to draw the text, green being the base...
What is the proper declaration of main?
.... You are not required to explicitly write a return statement in main(): if you let main() return without an explicit return statement, it's the same as if you had written return 0;. The following two main() functions have the same behavior:
int main() { }
int main() { return 0; }
There are tw...
How to change an element's title attribute using jQuery
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Before we write any code, let's discuss the difference between attributes and properties. Attributes are the settings you apply to elements in your HTML markup; the browser then parses the markup and creates DOM objects of various types that contain properties initializ...
Alternate output format for psql
... | 10304
dda_type | CHECKING
dda_status | PENDING_VERIFICATION
dda_is_deleted | f
dda_verify_op_id | 44938
version | 2
created | 2012-03-06 21:37:50.585845
modified | 2012-03-06 21:37:50.593425
c_id |
dda_nickname |
dd...