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java.lang.UnsupportedClassVersionError: Bad version number in .class file?
... I've had the issue, searched, found this answer, and it's been right. >_<
– AlbeyAmakiir
Apr 9 '13 at 23:49
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JS: Check if date is less than 1 hour ago?
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Define
var ONE_HOUR = 60 * 60 * 1000; /* ms */
then you can do
((new Date) - myDate) < ONE_HOUR
To get one hour from a date, try
new Date(myDate.getTime() + ONE_HOUR)
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How to write DataFrame to postgres table?
There is DataFrame.to_sql method, but it works only for mysql, sqlite and oracle databases. I cant pass to this method postgres connection or sqlalchemy engine.
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How to create a listbox in HTML without allowing multiple selection?
...t
you may want to check this site
http://www.htmlcodetutorial.com/forms/_SELECT.html
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Test if a variable is set in bash when using “set -o nounset”
...ash
$ /bin/bash --version | head -1
GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)
$ set -o nounset
If you want a non-interactive script to print an error and exit if a variable is null or not set:
$ [[ "${HOME:?}" ]]
$ [[ "${IAMUNBOUND:?}" ]]
bash: IAMUNBOUND: parameter null or no...
Using boolean values in C
...y use int for bool? That's wasteful. Use unsigned char. Or use C's builtin _Bool.
– user12211554
May 19 at 21:30
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What does %~dp0 mean, and how does it work?
...parameter.
Example: Let’s say you have a directory on C: called bat_files, and
in that directory is a file called example.bat. In this case, %~dp0
(combining the d and p modifiers) will expand to C:\bat_files.
Check out this Microsoft article for a full explanation.
Also, check...
Pickle incompatibility of numpy arrays between Python 2 and 3
...mport gzip
import numpy
with open('mnist.pkl', 'rb') as f:
u = pickle._Unpickler(f)
u.encoding = 'latin1'
p = u.load()
print(p)
Unpickling it in Python 2 and then repickling it is only going to create the same problem again, so you need to save it in another format.
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How to read multiple text files into a single RDD?
...n get a Buffer/List of S3 Paths :
import scala.collection.JavaConverters._
import java.util.ArrayList
import com.amazonaws.services.s3.AmazonS3Client
import com.amazonaws.services.s3.model.ObjectListing
import com.amazonaws.services.s3.model.S3ObjectSummary
import com.amazonaws.services.s3.model.L...
How to find encoding of a file via script on Linux?
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To convert encoding from 8859 to ASCII:
iconv -f ISO_8859-1 -t ASCII filename.txt
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