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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
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130
It appears that the first example
x = new Array(3);
Creates an array with undefined pointers....
How to add multi line comments in makefiles
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answered Dec 20 '10 at 20:10
Eric MelskiEric Melski
14.5k33 gold badges3030 silver badges4545 bronze badges
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MySQL: What's the difference between float and double?
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106
They both represent floating point numbers. A FLOAT is for single-precision, while a DOUBLE is ...
optional parameters in SQL Server stored proc?
I'm writing some stored procs in SQL Server 2008, and wondered if the concept of optional input parameters is possible here?
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Postgres unique constraint vs index
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Let's check uniqueness, just in case.
test=# insert into master values (0, 0);
INSERT 0 1
test=# insert into master values (0, 1);
ERROR: duplicate key value violates unique constraint "master_con_id_key"
DETAIL: Key (con_id)=(0) already exists.
test=# insert into master values (1, 0);
ERROR: ...
How can I remove 3 characters at the end of a string in php?
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Just do:
echo substr($string, 0, -3);
You don't need to use a strlen call, since, as noted in the substr docs:
If length is given and is negative, then that many characters will be omitted from the end of string
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HTML anchor link - href and onclick both?
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130
Just return true instead?
The return value from the onClick code is what determines whether the...
ActiveRecord, has_many :through, and Polymorphic Associations
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edited Dec 5 '11 at 9:09
answered Nov 5 '09 at 23:53
Em...
Aligning rotated xticklabels with their respective xticks
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209
You can set the horizontal alignment of ticklabels, see the example below. If you imagine a rec...
Why does Go have a “goto” statement
...mple, in the math/gamma.go file, the goto statement is used:
for x < 0 {
if x > -1e-09 {
goto small
}
z = z / x
x = x + 1
}
for x < 2 {
if x < 1e-09 {
goto small
}
z = z / x
x = x + 1
}
if x == 2 {
return z
}
x = x - 2
p ...