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Determine path of the executing script
...ing",other.name,"from",script.name))
source(other.name)
other.R:
print("hello")
output:
burner@firefighter:~$ main.R
[1] "Sourcing /home/burner/bin/other.R from /home/burner/bin/main.R"
[1] "hello"
burner@firefighter:~$ bin/main.R
[1] "Sourcing bin/other.R from bin/main.R"
[1] "hello"
burner@f...
Check if value exists in Postgres array
...ll throw error: ERROR: syntax error at or near "any"
select 1 where any('{hello}'::text[]) = 'hello';
Whereas below example works fine
select 1 where 'hello' = any('{hello}'::text[]);
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Understanding Magento Block and Block Type
...dName = 'mymodule'
app>local>namespace>modulename>Block>hello.php
in hello.php you created a function
class namespace_modulename_Block_Data extends Mage_Core_Block_Template
{
public function mydata()
{
$data = "Block is called";
return...
Check whether variable is number or string in JavaScript
...with literal notation, and not constructors, you can use typeof:.
typeof "Hello World"; // string
typeof 123; // number
If you're creating numbers and strings via a constructor, such as var foo = new String("foo"), you should keep in mind that typeof may return object for foo.
Perhaps...
Blocks and yields in Ruby
... the block. In 1.8, you'd get something like the following:
>> a = "Hello"
=> "Hello"
>> 1.times { |a| a = "Goodbye" }
=> 1
>> a
=> "Goodbye"
Whereas 1.9 would give you:
>> a = "Hello"
=> "Hello"
>> 1.times { |a| a = "Goodbye" }
=> 1
>> a
=> ...
What is the difference between '>' and a space in CSS selectors?
... #FFBA00 ;
}
<body>
<div>
<div>
<span>Hello...</span>
<p><span>Hello!</span></p>
</div>
<span>World!</span>
</div>
</body>
This one just selects the <span>Hello...</span&g...
mkdir's “-p” option
...ectories as needed
Use case example: Assume I want to create directories hello/goodbye but none exist:
$mkdir hello/goodbye
mkdir:cannot create directory 'hello/goodbye': No such file or directory
$mkdir -p hello/goodbye
$
-p created both, hello and goodbye
This means that the command will cre...
How to check if a string “StartsWith” another string?
... and JavaScript engines that already have it), you can use it like this:
"Hello World!".startsWith("He"); // true
var haystack = "Hello world";
var prefix = 'orl';
haystack.startsWith(prefix); // false
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...
What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
...oid Main(string[] args)
{
string[] test = new string[3];
test[0]= "hello1";
test[1]= "hello2";
test[2]= "hello3";
for (int i = 0; i <= 3; i++)
{
Console.WriteLine(test[i].ToString());
}
}
Result will be:
hello1
hello2
hello3
Unhandled Exception: System.Ind...
Get url parameters from a string in .NET
...a bunch of malformed URLs however. It might break on some/all of these:
hello.html?
hello.html?valuelesskey
hello.html?key=value=hi
hello.html?hi=value?&b=c
etc
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