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JavaScript checking for null vs. undefined and difference between == and ===
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To distill TJ's answer, === means value AND type are the same.
– Slappy
Feb 24 '11 at 8:48
13
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How can I get dict from sqlite query?
...c.execute('SELECT * FROM table').fetchall()
19.8 µs ± 1.05 µs per loop (mean ± std. dev. of 7 runs, 100000 loops each)
vs:
conn.row_factory = lambda c, r: dict([(col[0], r[idx]) for idx, col in enumerate(c.description)])
c = conn.cursor()
%timeit c.execute('SELECT * FROM table').fetchall()
1...
What's the meaning of * (asterisk) in XAML ColumnDefinition?
What is the meaning of * (asterisk) in the XAML below?
4 Answers
4
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What does “Receiver type 'CALayer' for instance message is a forward declaration” mean here?
I'm porting a block of code from an iOS4 project to iOS5 and I'm having some troubles with ARC. The code generates a PDF from a screen capture.
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What's the meaning of 'origin' in 'git push origin master'
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git remote add origin means to add a remote repository named origin, which doesn't have any special technical meaning, it's just a widely used default name for an original remote repository. You can use foobar instead of origin if you like.
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Make header and footer files to be included in multiple html pages
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It is required to run the code in server. Which means url needs to be like "http://.....".
– Patriotic
Apr 23 '17 at 15:58
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Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
...nd it is pure garbage; always use decimal/numeric.
Run this to see what I mean:
DECLARE
@mon1 MONEY,
@mon2 MONEY,
@mon3 MONEY,
@mon4 MONEY,
@num1 DECIMAL(19,4),
@num2 DECIMAL(19,4),
@num3 DECIMAL(19,4),
@num4 DECIMAL(19,4)
SELECT
@mon1 = 100, @mon2 = 339, @...
What is a “batch”, and why is GO used?
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So then GO means send it and then don't run the next batch until the client receives "OK, that batch is done and was successful" basically is what the GO does so that the next batch can be run successfully and the client knows for sure ...
What does the `#` operator mean in Scala?
...articular instance. In other words, there's no A.B, but there's A#B, which means a B nested class of any instance of A.
We can see this in work by changing the code above:
class A {
class B
def f(b: B) = println("Got my B!")
def g(b: A#B) = println("Got a B.")
}
And trying it out:
scala&...
Reload django object from database
Is it possible to refresh the state of a django object from database? I mean behavior roughly equivalent to:
4 Answers
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