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What is a plain English explanation of “Big O” notation?
...anges the comparison; and
complexity: if it takes me one second to sort 10,000 elements, how long will it take me to sort one million? Complexity in this instance is a relative measure to something else.
Come back and reread the above when you've read the rest.
The best example of Big-O I can thi...
How to evaluate http response codes from bash/shell script?
...esponse is a good answer, it overlooks failure scenarios. curl will return 000 if there is an error in the request or there is a connection failure.
url='http://localhost:8080/'
status=$(curl --head --location --connect-timeout 5 --write-out %{http_code} --silent --output /dev/null ${url})
[[ $stat...
ERROR 2006 (HY000): MySQL server has gone away
...
I solved the error ERROR 2006 (HY000) at line 97: MySQL server has gone away and successfully migrated a >5GB sql file by performing these two steps in order:
Created /etc/my.cnf as others have recommended, with the following contents:
[mysql]
connect_...
Select random lines from a file
...
I ran this on a 500M row file to extract 1,000 rows and it took 13 min. The file had not been accessed in months, and is on an Amazon EC2 SSD Drive.
– T. Brian Jones
Mar 4 '16 at 18:26
...
Why does HTML think “chucknorris” is a color?
...lace all nonvalid hexadecimal characters with 0's
chucknorris becomes c00c0000000
Pad out to the next total number of characters divisible by 3 (11 -> 12)
c00c 0000 0000
Split into three equal groups, with each component representing the corresponding colour component of an RGB colour:
RGB (...
How to convert a currency string to a double with jQuery or Javascript?
...ey(4999.99, "€", 2, ".", ","); // €4.999,99
accounting.unformat("€ 1.000.000,00", ","); // 1000000
You can find it at GitHub
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Date query with ISODate in mongodb doesn't seem to work
...ch with $date like below:
db.foo.find({dt: {"$date": "2012-01-01T15:00:00.000Z"}})
you'll get error:
error: { "$err" : "invalid operator: $date", "code" : 10068 }
Try this:
db.mycollection.find({
"dt" : {"$gte": new Date("2013-10-01T00:00:00.000Z")}
})
or (following comments by @user380...
Integer.valueOf() vs. Integer.parseInt() [duplicate]
...miliar with one. I would sanitize them.
int million = Integer.parseInt("1,000,000".replace(",", ""));
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Comma separator for numbers in R?
...g.mark=",", trim=TRUE, digits = 2, scientific = FALSE) gives ` "12,345,678.0000" "0.0012" so enough can be seen. i.e. the places formatting is not done on an element by element basis. Caught me out so wanted to share this.
– micstr
Dec 10 '15 at 11:44
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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
I installed MySQL on Mac OS X Mountain Lion with homebrew install mysql , but when I tried mysql -u root I got the following error:
...