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Store select query's output in one array in postgres
...two ways. One is to aggregate:
SELECT array_agg(column_name::TEXT)
FROM information.schema.columns
WHERE table_name = 'aean'
The other is to use an array constructor:
SELECT ARRAY(
SELECT column_name
FROM information.schema.columns
WHERE table_name = 'aean')
I'm presuming this is for plpgsql...
how to exclude null values in array_agg like in string_agg using postgres?
...(unnest(array_agg(x)) or creating a custom aggregate.
The first is of the form shown above:
SELECT
array_agg(u)
FROM (
SELECT
unnest(
array_agg(v)
) as u
FROM
x
) un
WHERE
u IS NOT NULL;
The second:
/*
With reference to
http://ejrh.w...
python assert with and without parenthesis
...
It's worth further emphasizing that statements of the form assert(test, message) probably wrong, and certainly confusing. No parens!
– tcarobruce
Jun 24 '10 at 17:24
...
How to remove convexity defects in a Sudoku square?
... filling this image, I get a mask for the sudoku grid:
mask = FillingTransform[largestComponent]
Now, I can use a 2nd order derivative filter to find the vertical and horizontal lines in two separate images:
lY = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {2, 0}], {0.02...
What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
... for Statement
A for class of statements should have
the following form:
for (initialization; condition; update) {
statements
}
for (variable in object) {
if (filter) {
statements
}
}
The first form should be used with
arrays and with loops of a
predeterminab...
Get element at specified position - JavaScript
...nded, try to use .hover(...) and css instead to enhance the application performance.
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Regex not operator
...uite, although generally you can usually use some workaround on one of the forms
[^abc], which is character by character not a or b or c,
or negative lookahead: a(?!b), which is a not followed by b
or negative lookbehind: (?<!a)b, which is b not preceeded by a
...
How to do a PUT request with curl?
...Quick Answer:
In a single line, the curl command would be:
a) If sending form data:
curl -X PUT -H "Content-Type: multipart/form-data;" -F "key1=val1" "YOUR_URI"
b) If sending raw data as json:
curl -X PUT -H "Content-Type: application/json" -d '{"key1":"value"}' "YOUR_URI"
c) If sending a ...
Entity Framework - Include Multiple Levels of Properties
...ferent alias name as c1,c2 something like that. My question is , how i can form a nested DTO collection out of all my includes:(.. May be you can take the above example itself, in that we are returning all the columns without any custom DTO (which itself is collection of DTO's)
...
Adding a user to a group in django
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$window.unbind('scroll', onScroll);
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