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How do I iterate over a range of numbers defined by variables in Bash?
...echo $i; done
edit: I prefer seq over the other methods because I can actually remember it ;)
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How to clone ArrayList and also clone its contents?
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You can't do it generically, though. clone() is not part of the Cloneable interface.
– Michael Myers♦
Apr 3 '09 at 20:47
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Standard Android Button with a different color
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I discovered that this can all be done in one file fairly easily. Put something like the following code in a file named custom_button.xml and then set background="@drawable/custom_button" in your button view:
<?xml version="1.0" encoding="utf-8"?&...
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
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dispatch_once() is absolutely synchronous. Not all GCD methods do things asynchronously (case in point, dispatch_sync() is synchronous). The use of dispatch_once() replaces the following idiom:
+ (MyClass *)sharedInstance {
static MyClass *sharedInstance;
@synchr...
Retrieve a Fragment from a ViewPager
...ble. Fragments that have not yet been instantiated, will return null when calling getRegisteredFragment. But I've been using this mostly to get the current Fragment out of the ViewPager: adapater.getRegisteredFragment(viewPager.getCurrentItem()) and this won't return null.
I'm not aware of any othe...
Save modifications in place with awk
... same question. I just tried it and it works on my 4.1.3. inplace is actually a library included with gawk according to iiSeymour's answer, so inplace is something that can be included as an includefile.
– cxw
Jun 23 '16 at 20:16
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Difference between Statement and PreparedStatement
...nt:
Precompilation and DB-side caching of the SQL statement leads to overall faster execution and the ability to reuse the same SQL statement in batches.
Automatic prevention of SQL injection attacks by builtin escaping of quotes and other special characters. Note that this requires that you use a...
How to send emails from my Android application?
... ex) {
Toast.makeText(MyActivity.this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
}
Otherwise you'll have to write your own client.
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Get number days in a specified month using JavaScript? [duplicate]
...t with 1 instead of 0 as is normal with Javascript dates, because it's actually switching to the previous month because the day number is 0.
– Allan Wintersieck
Jul 15 '16 at 15:16
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Dismissing a Presented View Controller
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I think Apple are covering their backs a little here for a potentially kludgy piece of API.
[self dismissViewControllerAnimated:NO completion:nil]
Is actually a bit of a fiddle. Although you can - legitimately - call this on the presented view controller, all it does is forward the me...