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Debugging Scala code with simple-build-tool (sbt) and IntelliJ
... code site lists commands for running the main class for a project or the tests, but there seem to be no commands for debugging.
...
Is volatile expensive?
...bly code the run method looks something like:
# {method} 'run2' '()V' in 'Test2'
# [sp+0x10] (sp of caller)
0xb396ce80: mov %eax,-0x3000(%esp)
0xb396ce87: push %ebp
0xb396ce88: sub $0x8,%esp ;*synchronization entry
; - Test2::run2@-1 (...
What does (x ^ 0x1) != 0 mean?
...expression is true.
Conversely the expression is false if x == 1.
So the test is the same as:
if (x != 1)
and is therefore (arguably) unnecessarily obfuscated.
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Maven: how to do parallel builds?
...are great, but I wanted to add something to the answers here regarding the test stability during parallel builds.
So, when Maven parallel build is used:
mvn -T 4 clean install # Builds with 4 threads
mvn -T 1C clean install # 1 thread per cpu core
mvn -T 1.5C clean install # 1.5 thread per cpu core
...
How do I make a simple makefile for gcc on Linux?
...
The simplest make file can be
all : test
test : test.o
gcc -o test test.o
test.o : test.c
gcc -c test.c
clean :
rm test *.o
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How do I test if a string is empty in Objective-C?
How do I test if an NSString is empty in Objective-C?
30 Answers
30
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Check if a Bash array contains a value
In Bash, what is the simplest way to test if an array contains a certain value?
35 Answers
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How to redirect to a 404 in Rails?
...gly conditional statements.
As a bonus, it's also super easy to handle in tests. For example, in an rspec integration test:
# RSpec 1
lambda {
visit '/something/you/want/to/404'
}.should raise_error(ActionController::RoutingError)
# RSpec 2+
expect {
get '/something/you/want/to/404'
}.to r...
The forked VM terminated without saying properly goodbye. VM crash or System.exit called
...
Don't forget error stream too: mvn clean test 2>err.txt 1>out.txt or mvn clean test > out.txt 2>&1 or mvn clean test 2>&1 | tee out.txt While redirecting, you can watch output in other console with less +F out.txt
– radzi...
jQuery how to find an element based on a data-attribute value?
...;b>').data('x', 1).filterByData('x').length // output: 1
// test data
function extractData() {
log('data-prop=val ...... ' + $('div').filterByData('prop', 'val').length);
log('data-prop .......... ' + $('div').filterByData('prop').length);
log('data-random ........ ' + $('di...