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List comprehension on a nested list?
...t comprehension in this case. This is also applicable if you are trying to cast to either int or str. For small number of lists with less elements per list, the difference is negligible. For larger lists with more elements per list one might like to use map instead of list comprehension, but it tot...
Grouped LIMIT in PostgreSQL: show the first N rows for each group?
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New solution (PostgreSQL 8.4)
SELECT
*
FROM (
SELECT
ROW_NUMBER() OVER (PARTITION BY section_id ORDER BY name) AS r,
t.*
FROM
xxx t) x
WHERE
x.r <= 2;
sha...
Why isn't the size of an array parameter the same as within main?
...eturns an object of type size_t, so you should print it with %zu (C99), or cast it to int if you use %d like above in your printf calls.
– Alok Singhal
Dec 29 '09 at 15:41
4
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xcode-select active developer directory error
...red node-gyp ... but could be triggered by anything which requires xcode-select .
23 Answers
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Copy data into another table
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If both tables are truly the same schema:
INSERT INTO newTable
SELECT * FROM oldTable
Otherwise, you'll have to specify the column names (the column list for newTable is optional if you are specifying a value for all columns and selecting columns in the same order as newTable's schema)...
How to ensure a form field is submitted when it is disabled?
I have a select form field that I want to mark as "readonly", as in the user cannot modify the value, but the value is still submitted with the form. Using the disabled attribute prevents the user from changing the value, but does not submit the value with the form.
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SELECT INTO a table variable in T-SQL
Got a complex SELECT query, from which I would like to insert all rows into a table variable, but T-SQL doesn't allow it.
8...
jQuery select2 get value of select tag?
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$("#first").val(); // this will give you value of selected element. i.e. 1,2,3.
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SQL Logic Operator Precedence: And and Or
...te:
Declare @x tinyInt = 1
Declare @y tinyInt = 0
Declare @z tinyInt = 0
Select Case When @x=1 OR @y=1 And @z=1 Then 'T' Else 'F' End -- outputs T
Select Case When (@x=1 OR @y=1) And @z=1 Then 'T' Else 'F' End -- outputs F
For those who like to consult references (in alphabetic order):
Microso...
How to correctly implement custom iterators and const_iterators?
...fining a copy constructor that is template, it won't compile if you try to cast the underlying type from const to non-const.
– Matthieu M.
Aug 27 '10 at 9:48
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