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Shell command to sum integers, one per line?
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Bit of awk should do it?
awk '{s+=$1} END {print s}' mydatafile
Note: some versions of awk have some odd behaviours if you are going to be adding anything exceeding 2^31 (2147483647). See comments for more background. One ...
Disable sorting for a particular column in jQuery DataTables
...estion is: how do I disable sorting for a particular column? I have tried with the following code, but it did not work:
23 ...
Laravel redirect back to original destination after login
...t the time of this answer there was no official support from the framework itself. Nowadays you can use the method pointed out by bgdrl below this method: (I've tried updating his answer, but it seems he won't accept)
On auth filter:
// redirect the user to "/login"
// and stores the url being acc...
Link to “pin it” on pinterest without generating a button
I have a page with tens or hundreds of posts, each one with social buttons.
I just can't generate all the buttons for each url: it is too slow (facebook, g+, twitter, pinterest... for hundreds of links). So, instead of the facebook share button to be generated on the fly, I use a simple img pointing...
Static Indexers?
...e a reference to any particular instance of the class, you can't use this with them, and consequently you can't use indexer notation on static methods.
The solution to your problem is using a singleton pattern as follows:
public class Utilities
{
private static ConfigurationManager _configurat...
Using awk to print all columns from the nth to the last
This line worked until I had whitespace in the second field.
24 Answers
24
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sed one-liner to convert all uppercase to lowercase?
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With tr:
# Converts upper to lower case
$ tr '[:upper:]' '[:lower:]' < input.txt > output.txt
# Converts lower to upper case
$ tr '[:lower:]' '[:upper:]' < input.txt > output.txt
Works using GNU sed (BSD sed d...
How do I pass command line arguments to a Node.js program?
I have a web server written in Node.js and I would like to launch with a specific folder. I'm not sure how to access arguments in JavaScript. I'm running node like this:
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SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
... between the two tables, returning all possible combinations of all rows. It has no on clause because you're just joining everything to everything.
A full outer join is a combination of a left outer and right outer join. It returns all rows in both tables that match the query's where clause, and ...
How to read contacts on Android 2.0
...ONE_NUMBER));
if (Boolean.parseBoolean(hasPhone)) {
// You know it has a number so now query it like this
Cursor phones = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = "+ contactId, null, ...