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Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...ens in your second case is that you are calling a method, defined in class testing from inside the map function. Spark sees that and since methods cannot be serialized on their own, Spark tries to serialize the whole testing class, so that the code will still work when executed in another JVM. You h...
How to “test” NoneType in python?
... None in it or not.
Quoting from is docs,
The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.
Since there can be only one instance of None, is would be the preferred way to check None.
H...
What are the Web.Debug.config and Web.Release.Config files for?
...environment (like if you have different connection strings for local/stage/test/whatever).
Does it even make sense to place a connection string in the root web.config file if I have have a local and remote one in the debug and release web.configs respectively.
It would only make sense if it wa...
How do I get the height and width of the Android Navigation Bar programmatically?
...at this piece of code does not return 0 on devices without navigation bar. Tested on Samsung S2 and S3. I got 72 and 96.
– Egis
Apr 13 '15 at 14:38
4
...
What encoding/code page is cmd.exe using?
...put encoding to match each other.
How can we find this out?
Here’s a test file containing Unicode characters:
ASCII abcde xyz
German äöü ÄÖÜ ß
Polish ąęźżńł
Russian абвгдеж эюя
CJK 你好
Here’s a Java program to print out the test file in a bunch ...
Bash: Syntax error: redirection unexpected
...t in a variable. then use heredoc. for example:
nc -l -p 80 <<< "tested like a charm";
can be written like:
nc -l -p 80 <<EOF
tested like a charm
EOF
and like this (this is what you want):
text="tested like a charm"
nc -l -p 80 <<EOF
$text
EOF
Practical example in busyb...
Best practice to mark deprecated code in Ruby?
... ability to execute deprecated code.
require 'lib/deprecated.rb'
require 'test/unit'
# this class is used to test the deprecate functionality
class DummyClass
def monkey
return true
end
deprecate :monkey
end
# we want exceptions for testing here.
Deprecate.set_action(:throw)
class Dep...
is_null($x) vs $x === null in PHP [duplicate]
...there is a time difference between using === and is_null(). Did some quick testing and got these results:
<?php
//checking with ===
$a = array();
$time = microtime(true);
for($i=0;$i<10000;$i++) {
if($a[$i] === null) {
//do nothing
}
}
echo 'Testing with === ', microtime(tru...
Can I export a variable to the environment from a bash script without sourcing it?
...R
Now we will execute a script to source the variable then unset it :
./test-export.sh
HELLO, VARABLE
--
.
the code: cat test-export.sh
#!/bin/bash
# Source env variable
source ./export.bash
# echo out the variable in test script
echo $VAR
# unset the variable
...
str.startswith with a list of strings to test for
...
str.startswith allows you to supply a tuple of strings to test for:
if link.lower().startswith(("js", "catalog", "script", "katalog")):
From the docs:
str.startswith(prefix[, start[, end]])
Return True if string starts with the prefix, otherwise return False. prefix can ...