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check if directory exists and delete in one command unix
...ot. This command may work and produce similar results but actually doing a test before the command makes more sense.
– Ankur Chauhan
Jan 28 '13 at 5:04
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How to cast int to enum in C++?
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int i = 1;
Test val = static_cast<Test>(i);
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What is Mocking?
...word is something made as an imitation.
Mocking is primarily used in unit testing. An object under test may
have dependencies on other (complex) objects. To isolate the behavior
of the object you want to replace the other objects by mocks that
simulate the behavior of the real objects. This is usef...
Chrome Extension - Get DOM content
...heck the URL of the active tab against our pattern and...
if (urlRegex.test(tab.url)) {
// ...if it matches, send a message specifying a callback too
chrome.tabs.sendMessage(tab.id, {text: 'report_back'}, doStuffWithDom);
}
});
content.js:
// Listen for messages
chrome.run...
How to check that an object is empty in PHP?
...$two == new stdClass()); // TRUE
var_dump($one == $two); // TRUE
$two->test = TRUE;
var_dump($two == new stdClass()); // FALSE
var_dump($one == $two); // FALSE
$two->test = FALSE;
var_dump($one == $two); // FALSE
$two->test = NULL;
var_dump($one == $two); // FALSE
$two->test = TRUE;
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AngularJS ngClass conditional
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Your first attempt was almost right, It should work without the quotes.
{test: obj.value1 == 'someothervalue'}
Here is a plnkr.
The ngClass directive will work with any expression that evaluates truthy or falsey, a bit similar to Javascript expressions but with some differences, you can read ab...
What is the instanceof operator in JavaScript?
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instanceof
The Left Hand Side (LHS) operand is the actual object being tested to the Right Hand Side (RHS) operand which is the actual constructor of a class. The basic definition is:
Checks the current object and returns true if the object
is of the specified object type.
Here are some good ...
How do I check if there are duplicates in a flat list?
... to get O(N logN) if they're at least comparable. But you need to know or test the characteristics of the items (hashable or not, comparable or not) to get the best performance you can -- O(N) for hashables, O(N log N) for non-hashable comparables, otherwise it's down to O(N squared) and there's no...
Can PostgreSQL index array columns?
...e the array operators and the GIN-index type.
Example:
CREATE TABLE "Test"("Column1" int[]);
INSERT INTO "Test" VALUES ('{10, 15, 20}');
INSERT INTO "Test" VALUES ('{10, 20, 30}');
CREATE INDEX idx_test on "Test" USING GIN ("Column1");
-- To enforce index usage because we hav...
How to check if there's nothing to be committed in the current branch?
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An alternative to testing whether the output of git status --porcelain is empty is to test each condition you care about separately. One might not always care, for example, if there are untracked files in the output of git status.
For exampl...