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Rails migrations: Undo default setting for a column
...n_default( :table_name, :column_name, from: nil, to: false )
end
Rails 3 and Rails 4
def up
change_column_default( :table_name, :column_name, nil )
end
def down
change_column_default( :table_name, :column_name, false )
end
...
Getting the parent div of element
...ntNode, which Element inherits from Node:
parentDiv = pDoc.parentNode;
Handy References:
DOM2 Core specification - well-supported by all major browsers
DOM2 HTML specification - bindings between the DOM and HTML
DOM3 Core specification - some updates, not all supported by all major browsers
HTM...
How can you sort an array without mutating the original array?
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this is really great.i think easier to understand than the concat and other approaches
– sktguha
Aug 31 at 20:02
add a comment
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How can I check the extension of a file?
...swith('.mp3'):
...
elif m.endswith('.flac'):
...
To be case-insensitive, and to eliminate a potentially large else-if chain:
m.lower().endswith(('.png', '.jpg', '.jpeg'))
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How to sort a list of lists by a specific index of the inner list?
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Could you give more details about in place and not in place ?
– qun
Oct 10 '15 at 15:42
10
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Can you write nested functions in JavaScript?
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Yes, it is possible to write and call a function nested in another function.
Try this:
function A(){
B(); //call should be B();
function B(){
}
}
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Return number of rows affected by UPDATE statements
...to capture the output of INSERTED.* in a table variable or temporary table and count the records. For example,
DECLARE @temp TABLE (
[LockId] [int],
[StartTime] [datetime] NULL,
[EndTime] [datetime] NULL
)
UPDATE test_table
SET StartTime = '2011 JUL 01'
OUTPUT INSERTED.* INTO @temp
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How do I get the time of day in javascript/Node.js?
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This function will return you the date and time in the following format: YYYY:MM:DD:HH:MM:SS. It also works in Node.js.
function getDateTime() {
var date = new Date();
var hour = date.getHours();
hour = (hour < 10 ? "0" : "") + hour;
var min...
assertEquals vs. assertEqual in python
Is there a difference between assertEquals and assertEqual in the python unittest.TestCase ?
7 Answers
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Deserialize from string instead TextReader
...edited Oct 6 '16 at 12:19
meJustAndrew
4,44244 gold badges3434 silver badges6161 bronze badges
answered Feb 27 '10 at 14:34
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