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What is the most pythonic way to check if an object is a number?
...vector or a number is comparing apples to oranges - I can have a vector of strings or numbers, and I can have a single string or single number. You are interested in how many you have (1 or more), not what type you actually have.
my solution for this problem is to check whether the input is a singl...
Run a single migration file
...iveRecord::Migration
def change
add_column :products, :part_number, :string
end
end
You can create an instance of the migration and run migrate(:up) or migrate(:down) on an instance, like this:
$ rails console
>> require "db/migrate/20090408054532_add_part_number_to_products.rb"
>...
How do I determine the current operating system with Node.js
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While the string compare of process.platform === 'win32' seems more concise than the regex, and obviously quicker. The regex Mauvis has posted seems to be a better quality check. If Node/Windows every decided to return win64, winARM, e...
Converting Dictionary to List? [duplicate]
...
Your problem is that you have key and value in quotes making them strings, i.e. you're setting aKey to contain the string "key" and not the value of the variable key. Also, you're not clearing out the temp list, so you're adding to it each time, instead of just having two items in it.
To ...
PHP: How to check if image file exists?
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You need the filename in quotation marks at least (as string):
if (file_exists('http://www.mydomain.com/images/'.$filename)) {
… }
Also, make sure $filename is properly validated. And then, it will only work when allow_url_fopen is activated in your PHP config
...
How can I get the corresponding table header (th) from a table cell (td)?
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Solution that handles colspan
I have a solution based on matching the left edge of the td to the left edge of the corresponding th. It should handle arbitrarily complex colspans.
I modified the test case to show that arbitrary colspan is ...
How can I check if a checkbox is checked?
I am building a mobile web app with jQuery Mobile and I want to check if a checkbox is checked. Here is my code.
14 Answers...
IDENTITY_INSERT is set to OFF - How to turn it ON?
...ntent]
@ContentID int,
SET IDENTITY_INSERT tbl_content ON
...insert command...
SET IDENTITY_INSERT tbl_content OFF
GO
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Get Root Directory Path of a PHP project
... is what you are looking for, isn't it?
In that case you could explode the string by slashes and return the first one:
$pathInPieces = explode('/', $_SERVER['DOCUMENT_ROOT']);
echo $pathInPieces[0];
This will output the server's root directory.
Update: When you use the constant DIRECTORY_SEPARAT...
Environment variable substitution in sed
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What if the string contains a \ followed by an n - how to stop sed from converting that into a single newline character?
– Max Waterman
Jul 24 at 9:58
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