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How do you create a random string that's suitable for a session ID in PostgreSQL?
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random() gets called length times (like in many of the other solutions). Is there a more efficient way to choose from 62 characters each time? How does this perform compared to md5()?
– ma11hew28
Feb 1...
Why use the yield keyword, when I could just use an ordinary IEnumerable?
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Note that using FullList.Where(IsItemInPartialList) will be just as lazy. Only, it requires far less compiler generated custom ---gunk--- code. And less developer time writing and maintaining. (Of course, that was just this example)
– sehe
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What happens to a github student account's repositories at the end of 2 years?
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Ok, so the user can manually make the repo's public prior to or after the automatic downgrade if they do not desire to pay to access their code again.
– indivisible
Jun 23 '14 at 11:55
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Copying a HashMap in Java
...ew HashMap<Integer,myObject>(myobjectListA);
This will create a (shallow) copy of the map.
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How to convert object array to string array in Java
...s a work of beauty and satisfies the requirement of being able to aesthetically convert a non-String object array to an array of their toString equivalents. The currently accepted answer does not accomplish this.
– b4n4n4p4nd4
Jan 11 '18 at 21:34
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Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (
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That's a side-effect of a feature called optimistic concurrency.
Not 100% sure how to turn it on/off in Entity Framework but basically what it's telling you is that between when you grabbed the data out of the database and when you saved your changes someone ...
TextView Marquee not working [duplicate]
... android:marqueeRepeatLimit="marquee_forever"
android:scrollHorizontally="true"
android:paddingLeft="15dip"
android:paddingRight="15dip"
android:focusable="true"
android:focusableInTouchMode="true"
android:freezesText="true">
Edit (on behalf of Adil Hussain):
tex...
How to jQuery clone() and change id?
...D "klon4")
var $klon = $div.clone().prop('id', 'klon'+num );
// Finally insert $klon wherever you want
$div.after( $klon.text('klon'+num) );
});
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<button id="cloneDiv">CLICK TO CLONE</button>
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Multiple INSERT statements vs. single INSERT with multiple VALUES
...on't seem to be available so instead I had to look at the equivalent UNION ALL construction in SQL Server 2005.
A typical stack trace is below
sqlservr.exe!FastDBCSToUnicode() + 0xac bytes
sqlservr.exe!nls_sqlhilo() + 0x35 bytes
sqlservr.exe!CXVariant::CmpCompareStr() + 0x2b bytes
sqls...
Reorder / reset auto increment primary key
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You could drop the primary key column and re-create it. All the ids should then be reassigned in order.
However this is probably a bad idea in most situations. If you have other tables that have foreign keys to this table then it will definitely not work.
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