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How can I check if an element exists in the visible DOM?
...w do you test an element for existence without the use of the getElementById method?
25 Answers
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Resetting generator object in Python
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@Dewfy What do you mean by "save signature of function call"? Could you please explain? Do you mean saving the parameters passed to the generator?
– Андрей Беньковский
Dec 29 '15 at 21:32
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How to force push a reset to remote repository?
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The message means that you're not allowed to do non-fast-forward push.
Your remote repository has most likely denyNonFastforwards = true in its config. If you change that, git push --force should work.
To change the setting, you need a...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...ion statement just by putting ".to_sql" at the end. This question also provides that answer: stackoverflow.com/questions/3814738/…
– Steve Midgley
Sep 17 '14 at 5:03
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What's the difference between .bashrc, .bash_profile, and .environment?
...ables.
.bashrc is used for non login shells.
I'm not sure what that means. I know
that RedHat
executes it everytime you start
another shell (su to this user or
simply calling bash again) You might
want to put aliases in there but again
I am not sure what that means. I
simply ign...
Convert a list of characters into a string
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To clarify: "".join(['a','b','c']) means Join all elements of the array, separated by the string "". In the same way, " hi ".join(["jim", "bob", "joe"]) will create "jim hi bob hi joe".
– Jack
Dec 22 '14 at 19:44
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How to get a Color from hexadecimal Color String
...ly opaque. Here is how you would set it in code. Using 0x at the beginning means it is hexadecimal and not base 10.
int myColor = 0xFF3F51B5;
myView.setBackgroundColor(myColor);
Color from String
As others have noted, you can use Color.parseString like so
int myColor = Color.parseColor("#3F51B5...
GIT commit as different user without email / or only email
...s hinted to in this SO answer, is
Name <email>
In your case, this means you want to write
git commit --author="Name <email>" -m "whatever"
Per Willem D'Haeseleer's comment, if you don't have an email address, you can use <>:
git commit --author="Name <>" -m "whatever"
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SQLiteDatabase.query method
... null, null, orderBy);
// since we have a named column we can do
int idx = c.getColumnIndex("max");
is equivalent to the following raw query
String queryString =
"SELECT column1, (SELECT max(column1) FROM table1) AS max FROM table1 " +
"WHERE column1 = ? OR column1 = ? ORDER BY colu...
cartesian product in pandas
...e cartesian product on.
My use case was that I needed a list of all store IDs on for each week in my list. So, I created a list of all the weeks I wanted to have, then a list of all the store IDs I wanted to map them against.
The merge I chose left, but would be semantically the same as inner in t...