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Is the order guaranteed for the return of keys and values from a LinkedHashMap object?
...kedHashMap has a predictable iteration order (insertion order). Does the Set returned by LinkedHashMap.keySet() and the Collection returned by LinkedHashMap.values() also maintain this order?
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Secure random token in Node.js
...e argument (size != final length).
2. Crypto random values from limited set of characters
Beware that with this solution the generated random string is not uniformly distributed.
You can also build a strong random string from a limited set of characters like that:
var crypto = require('cry...
SQL, Postgres OIDs, What are they and why are they useful?
...EATE TABLE … WITH OIDS command
default_with_oids (boolean) compatibility setting
The data type OID remains in Postgres 12. You can explicitly create a column of the type OID.
After migrating to Postgres 12, any optionally-defined system column oid will no longer be invisible by default. Perfor...
How do I call one constructor from another in Java?
... - the object is "created" in that its memory is allocated and the type is set before any constructor bodies are executed. Constructors are initialization rather than creation. In particular, the type of the object is its "final" type right from the start - so if you call any virtual methods from co...
UINavigationController “back button” custom text?
...ust to clarify Tyler's comment because I did not understand this at first: Setting the backBarButtonItem in a view controllers navigationItem is setting the button that will show to get BACK to this view controller. Also note that although there is no button style for the arrow button this button wi...
How can I open a link in a new window?
...
You can like:
window.open('url', 'window name', 'window settings')
jQuery:
$('a#link_id').click(function(){
window.open('url', 'window name', 'window settings');
return false;
});
You could also set the target to _blank actually.
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With bash, how can I pipe standard error into another process?
...planations are back to front for the second two redirections. 1>&2- sets file handle 2 (original stderr) to handle 1 (original stdout) 2>&3- sets file handle 3 (copied stdout) to handle 2 (original stderr). Please correct me if I'm wrong though. btw, I would guess that the dash on 2 is...
Nginx 403 forbidden for all files
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Same here. On my install of CentOS 6, /home/user dirs are set to 700 by default.
– jjt
Apr 13 '12 at 18:49
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Why use a READ UNCOMMITTED isolation level?
.... My understanding is read uncommitted will return whatever value was last set even from uncommitted transactions. If so, the result would not be retrieving data "a few seconds out of date". It would (or at least could if the transaction that wrote the data you read gets rolled back) be retrieving d...
Disable EditText blinking cursor
...ither the xml attribute android:cursorVisible="false" or the java function setCursorVisible(false).
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