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How to prevent logback from outputting its own status at the start of every log when using a layout
...4j-api-1.6.1, logback core/classic 0.9.24). Simplest log configuration for testing is:
10 Answers
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How to create module-wide variables in Python? [duplicate]
..._ # add this line!
if __DBNAME__ is None: # see notes below; explicit test for None
__DBNAME__ = name
else:
raise RuntimeError("Database name has already been set.")
By the way, for this example, the simple if not __DBNAME__ test is adequate, because any string value other...
php check if array contains all array values from another array
...
A bit shorter with array_diff
$musthave = array('a','b');
$test1 = array('a','b','c');
$test2 = array('a','c');
$containsAllNeeded = 0 == count(array_diff($musthave, $test1));
// this is TRUE
$containsAllNeeded = 0 == count(array_diff($musthave, $test2));
// this is FALSE
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What is the purpose of .PHONY in a Makefile?
... files at both the side of ':' symbol in a rule.
Example
In a directory 'test' following files are present:
prerit@vvdn105:~/test$ ls
hello hello.c makefile
In makefile a rule is defined as follows:
hello:hello.c
cc hello.c -o hello
Now assume that file 'hello' is a text file containin...
JavaScript isset() equivalent
...T pass a function to our isset() that returns the value we're
// trying to test(ES6 arrow function)
isset(() => some) // false
// Defining objects
let some = { nested: { value: 'hello' } }
// More tests that never throw an error
isset(() => some) // true
isset(() => some.nested) // true
i...
Avoiding if statement inside a for loop?
...rry about in terms of performance
In this case I advocate for keeping the test inside the loop for clarity.
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Can I use git diff on untracked files?
...ince I really only use it interactively, I'm OK with a hack:
d() {
if test "$#" = 0; then
(
git diff --color
git ls-files --others --exclude-standard |
while read -r i; do git diff --color -- /dev/null "$i"; done
) | `git config --get core...
Convert string in base64 to image and save on filesystem in Python
... @Oleg Tarasenko, I had a typo in the second method. I fiexed it and tested it on your string and it works.
– John La Rooy
Feb 25 '10 at 21:13
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Generate an integer that is not among four billion given ones
...I used it in my own answer) but it's not obvious to everybody. It's a good test to see if you can spot obvious solutions or if you're going to over-complicate everything you touch.
– Mark Ransom
Aug 23 '11 at 17:00
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How to detect if a function is called as constructor?
...s made available to the executing code, so the only thing it's possible to test inside x is the this value, which is what all the answers here are doing. As you've observed, a new instance of* x when calling x as a constructor is indistinguishable from a pre-existing instance of x passed as this whe...