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Check whether a variable is a string in Ruby
...ooking for instance_of?. is_a? and kind_of? will return true for instances from derived classes.
class X < String
end
foo = X.new
foo.is_a? String # true
foo.kind_of? String # true
foo.instance_of? String # false
foo.instance_of? X # true
...
adb shell command to make Android package uninstall dialog appear
...
You can do it from adb using this command:
adb shell am start -a android.intent.action.DELETE -d package:<your app package>
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Way to get number of digits in an int?
...it:
After I wrote the benchmark, I took a sneak peak into Integer.toString from Java 6, and I found that it uses:
final static int [] sizeTable = { 9, 99, 999, 9999, 99999, 999999, 9999999,
99999999, 999999999, Integer.MAX_VALUE };
// Requires positive x
static in...
How do you update Xcode on OSX to the latest version?
...at this will only show as an update if you installed your version directly from the App Store. However, if you installed it from elsewhere, you will need to re-download the entire new version of Xcode.
– CodeBiker
Aug 3 '13 at 20:39
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How do I search for an object by its ObjectId in the mongo console?
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import { ObjectId } from "mongodb"; works for fancier JS.
– NetOperator Wibby
Dec 3 '18 at 5:09
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Initialize parent's protected members with initialization list (C++)
...e base class). This causes the something member to be default initialized.
From C++0x draft:
12.6.2 Initializing bases and members
2 Names in a mem-initializer-id are
looked up in the scope of the
constructor’s class and, if not found
in that scope, are looked up in the
scope containing the const...
Why are these constructs using pre and post-increment undefined behavior?
...he hyper-modernist philosophy had gotten. What irks me is the progression from "We don't need to officially recognize this behavior because the platforms where it's needed can support it anyway" to "We can remove this behavior without providing a usable replacement because it was never recognized a...
How to get an array of specific “key” in multidimensional array without looping
Let's assume I have the following multidimensional array (retrieved from MySQL or a service):
4 Answers
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How to get string width on Android?
...t = new Paint();
paint.setTextSize(20);
Typeface typeface = Typeface.createFromAsset(getAssets(), "Helvetica.ttf");
paint.setTypeface(typeface);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL);
Rect result = new Rect();
paint.getTextBounds(str, 0, str.length(), result);
Log.i("Text di...
Convert NSData to String?
... Because the people that are here are converting a data response from a server to a string.
– Necro
Nov 21 '13 at 4:58
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