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Overloading Macro on Number of Arguments
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edited Aug 1 '12 at 16:13
answered Aug 1 '12 at 16:08
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rake db:schema:load vs. migrations
... be made to the database during deploys: migrations provide this functionality with a rollback failsafe. If you run rake db:schema:load on a production server, you'll end up deleting all your production data. This is a dangerous habit to get into.
That being said, I believe it is a decent practice ...
100% Min Height CSS layout
In particular if you have a layout with a header and footer of fixed height ,
13 Answers
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What do the makefile symbols $@ and $< mean?
...$@ is the name of the target being generated, and $< the first prerequisite (usually a source file). You can find a list of all these special variables in the GNU Make manual.
For example, consider the following declaration:
all: library.cpp main.cpp
In this case:
$@ evaluates to all
$< eval...
Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
... see people making over and over again is trying to parse XML or HTML with a regex. Here are a few of the reasons parsing XML and HTML is hard:
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Ruby class instance variable vs. class variable
..., :doll]
#=> [:car, :doll]
#=> [:car, :doll]
#=> [:car, :doll]
With an instance variable on a class (not on an instance of that class) you can store something common to that class without having sub-classes automatically also get them (and vice-versa). With class variables, you have the c...
Python function overloading
...oading?
First, one needs to understand the concept of overloading and why it's not applicable to python.
When working with languages that can discriminate data types at
compile-time, selecting among the alternatives can occur at
compile-time. The act of creating such alternative functions f...
Copy folder recursively, excluding some folders
I am trying to write a simple bash script that will copy the entire contents of a folder including hidden files and folders into another folder, but I want to exclude certain specific folders. How could I achieve this?
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Remove insignificant trailing zeros from a number?
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If you convert it to a string it will not display any trailing zeros, which aren't stored in the variable in the first place since it was created as a Number, not a String.
var n = 1.245000
var noZeroes = n.toString() // "1.245"
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Find a pair of elements from an array whose sum equals a given number
...ive sum
for i=0 to arr.length - 1 do
# key is the element and value is its index.
hash(arr[i]) = i
end-for
for i=0 to arr.length - 1 do
# if K-th element exists and it's different then we found a pair
if hash(K - arr[i]) != i
print "pair i , hash(K - arr[i]) has sum K"
end-if
en...