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Storing time-series data, relational or non?
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Create a file, name it 1_2.data. weired idea? what you get:
You save up to 50% of space because you don't need to repeat the fk_to_device and fk_to_metric value for every data point.
You save up even more space because you don't need any indices.
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How to get the name of enumeration value in Swift?
...sion 2) you can now print type names and enum cases by default using print(_:), or convert to String using String's init(_:) initializer or string interpolation syntax. So for your example:
enum City: Int {
case Melbourne = 1, Chelyabinsk, Bursa
}
let city = City.Melbourne
print(city)
// print...
How can I make a UITextField move up when the keyboard is present - on starting to edit?
...henever the keyboard is shown.
Here is some sample code:
#define kOFFSET_FOR_KEYBOARD 80.0
-(void)keyboardWillShow {
// Animate the current view out of the way
if (self.view.frame.origin.y >= 0)
{
[self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < ...
getting exception “IllegalStateException: Can not perform this action after onSaveInstanceState”
...d onSaveInstanceState(Bundle outState) {
outState.putString("WORKAROUND_FOR_BUG_19917_KEY", "WORKAROUND_FOR_BUG_19917_VALUE");
super.onSaveInstanceState(outState);
}
EDIT2: this may also occur if you are trying to perform a transaction after your Activity is gone in background. To avoid th...
Return index of greatest value in an array
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If you are utilizing underscore, you can use this nice short one-liner:
_.indexOf(arr, _.max(arr))
It will first find the value of the largest item in the array, in this case 22. Then it will return the index of where 22 is within the array, in this case 2.
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Base 64 encode and decode example code
...Charsets:
// Sending side
byte[] data = text.getBytes(StandardCharsets.UTF_8);
String base64 = Base64.encodeToString(data, Base64.DEFAULT);
// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String text = new String(data, StandardCharsets.UTF_8);
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Difference between author and committer in Git?
...ld find was using the environment variables to override the committer:
GIT_COMMITTER_NAME='a' GIT_COMMITTER_EMAIL='a' git commit --author 'a <a>'
How to get the committer and commit date of a given commit?
Only author data shows by default on git log.
To see the committer date you can eit...
How to get RelativeLayout working with merge and include?
....google.com/issues/36908001
To fix it, make sure you overwrite BOTH layout_width and layout_height when including, otherwise everything will be ignored.
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Remove property for all objects in array
...swered Oct 19 '17 at 21:47
piotr_czpiotr_cz
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Swift make method parameter mutable?
...eclare an inout parameter. Think: passing in a pointer.
func reduceToZero(_ x: inout Int) {
while (x != 0) {
x = x-1
}
}
var a = 3
reduceToZero(&a)
print(a) // will print '0'
This can be particularly useful in recursion.
Apple's inout declaration guidelines can be found...