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Changing password with Oracle SQL Developer
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The correct syntax for updating the password using SQL Developer is:
alter user user_name identified by new_password replace
old_password ;
You can check more options for this command here: ALTER USER-Oracle DOCS
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Find MongoDB records where array field is not empty
... that index is utilized during the query, you will get unexpected results. For example: db.doc.find({'nums': { $gt: [] }}).hint({ _id: 1 }).count() returns the right number, while db.doc.find({'nums': { $gt: [] }}).hint({ nums: 1 }).count() returns 0.
– wojcikstefan
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How do I remove duplicate items from an array in Perl?
...rld of 1987 - when this was created - and almost 100% backword compbaility for perl - so it cannot be eliminated.
– szabgab
Jun 25 '12 at 8:19
18
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Is Big O(logn) log base e?
For binary search tree type of data structures, I see the Big O notation is typically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different...
How to disable scrolling temporarily?
...nction preventDefault(e) {
e.preventDefault();
}
function preventDefaultForScrollKeys(e) {
if (keys[e.keyCode]) {
preventDefault(e);
return false;
}
}
// modern Chrome requires { passive: false } when adding event
var supportsPassive = false;
try {
window.addEventListener("test", n...
How do I safely pass objects, especially STL objects, to and from a DLL?
...ause there's no standard C++ ABI (application binary interface, a standard for calling conventions, data packing/alignment, type size, etc.), you will have to jump through a lot of hoops to try and enforce a standard way of dealing with class objects in your program. There's not even a guarantee it'...
std::string formatting like sprintf
I have to format std::string with sprintf and send it into file stream. How can I do this?
40 Answers
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Structs in Javascript
...mes.split(' ');
var count = names.length;
function constructor() {
for (var i = 0; i < count; i++) {
this[names[i]] = arguments[i];
}
}
return constructor;
}
var Item = makeStruct("id speaker country");
var row = new Item(1, 'john', 'au');
alert(row.speaker); // displays: j...
How to update a menu item shown in the ActionBar?
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Option #1: Try invalidateOptionsMenu(). I don't know if this will force an immediate redraw of the action bar or not.
Option #2: See if getActionView() returns anything for the affected MenuItem. It is possible that showAsAction simply automatically creates action views for you. If so, you...
In STL maps, is it better to use map::insert than []?
...rite
map[key] = value;
there's no way to tell if you replaced the value for key, or if you created a new key with value.
map::insert() will only create:
using std::cout; using std::endl;
typedef std::map<int, std::string> MyMap;
MyMap map;
// ...
std::pair<MyMap::iterator, bool> res...