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What is the meaning of addToBackStack with null parameter?

... What is the meaning of addToBackStack(null) followed by a commit()? Quoting docs: By calling addToBackStack(), the replace transaction is saved to the back stack so the user can reverse the transaction and bring back ...
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In Gradle, is there a better way to get Environment Variables?

... Well; this works as well: home = "$System.env.HOME" It's not clear what you're aiming for. share | improve this answer | follow | ...
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How to calculate “time ago” in Java?

... in millisecond but it's a difference between times not an absolute value. What you are getting is the time which has passed from the 1st of January 1970 the date when the unix timestamp started – Riccardo Casatta Aug 14 '17 at 8:12 ...
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Ignoring SSL certificate in Apache HttpClient 4.3

...nitialized response object, or even check such a case. I don't have a clue what you're talking about? – eis Nov 22 '13 at 13:01 1 ...
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Meaning

I wanted to know what is the meaning of 2 Answers 2 ...
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Converting Go struct to JSON

...own custom MarshalJSON and UnmarshalJSON methods and intentionally control what should be included, ex: package main import ( "fmt" "encoding/json" ) type User struct { name string } func (u *User) MarshalJSON() ([]byte, error) { return json.Marshal(&struct { Name ...
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How can I convert a string to a number in Perl?

... what about comparisons when the string has a comma in it? – Ramy May 22 '14 at 15:21 ...
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Creating an empty Pandas DataFrame, then filling it?

... @MoustafaAAtta What are the alternatives to append iteratively data to the dataframe ? – MysteryGuy Aug 13 '18 at 11:24 ...
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:first-child not working as expected

...st-of-type { color: blue; } But with browser compatibility woes and whatnot, you're better off giving the first h1 a class, then targeting that class: .detail_container h1.first { color: blue; } share |...
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convert pfx format to p12

...ill let you specify the encryption passphrase for the certificate. This is what you will enter when using the certificate. share | improve this answer | follow ...