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Integer division: How do you produce a double?
...
Widening primitive conversions do not
lose information about the overall
magnitude of a numeric value.
[...]
Conversion of an int or a long value
to float, or of a long value to
double, may result in loss of
precision-that is, the result may lose
some of the least significa...
Add a default value to a column through a migration
... What do you mean when you say "make sure you update the field manually on the migration"? How does one do that?
– David Argyle Thacker
Jan 8 '16 at 21:51
7
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Java synchronized static methods: lock on object or class
...en when there are multiple instances of that class. The locking is essentially the same as locking on the Object.class for each synchronized method.
– Steven
Oct 16 '12 at 23:36
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Test for multiple cases in a switch, like an OR (||)
...
You can use fall-through:
switch (pageid)
{
case "listing-page":
case "home-page":
alert("hello");
break;
case "details-page":
alert("goodbye");
break;
}
...
Can't connect to local MySQL server through socket '/tmp/mysql.sock
...t over 2 weeks (not even kidding) and this is the closest I have got to finally be able to connect. It is however stuck on 'starting mysql' ..... But thanks, nice post!
– L. Klotz
Nov 3 '15 at 12:40
...
How to center canvas in html5
..., let me add a little bit more details.
The above properties will horizontally center the canvas, div or whatever other node you have relative to it's parent. There is no need to change the top or bottom margins and paddings. You specify a width and let the browser fill the remaining space with the...
SQL WHERE ID IN (id1, id2, …, idn)
...tion 2 does the same but you repeat the column name lots of times; additionally the SQL engine doesn't immediately know that you want to check if the value is one of the values in a fixed list. However, a good SQL engine could optimize it to have equal performance like with IN. There's still the rea...
How to output numbers with leading zeros in JavaScript [duplicate]
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NOTE: Potentially outdated. ECMAScript 2017 includes String.prototype.padStart
You're asking for zero padding? Not really rounding. You'll have to convert it to a string since numbers don't make sense with leading zeros. Something like ...
How exactly to use Notification.Builder
...n.Builder(ctx);
builder.setContentIntent(contentIntent)
.setSmallIcon(R.drawable.some_img)
.setLargeIcon(BitmapFactory.decodeResource(res, R.drawable.some_big_img))
.setTicker(res.getString(R.string.your_ticker))
.setWhen(System.currentTimeMillis())
...
How do I get the current line number?
...er to do this work for you, by writing a utility method that uses the new caller attributes:
using System.Runtime.CompilerServices;
static void SomeMethodSomewhere()
{
ShowMessage("Boo");
}
...
static void ShowMessage(string message,
[CallerLineNumber] int lineNumber = 0,
[CallerMemberN...