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What is the difference between “ is None ” and “ ==None ”
...mparison is implemented elementwise:
import numpy as np
a = np.zeros(3) # now a is array([0., 0., 0.])
a == None #compares elementwise, outputs array([False, False, False]), i.e. not boolean!!!
a is None #compares object to object, outputs False
...
How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
...me old date-time classes such as java.util.Date and java.sql.Timestamp are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
Dec 24 '18 at 20:01
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What is the difference between properties and attributes in HTML?
...ibute value. type isn't a pure reflected property because it's limited to known values (e.g., the valid types of an input). If you had <input type="foo">, then theInput.getAttribute("type") gives you "foo" but theInput.type gives you "text".
In contrast, the value property doesn't reflect the ...
Where does mongodb stand in the CAP theorem?
...k-file, as soon as it reconnects to the set(the old primary is a secondary now). So in this case some consistency is sacrificed for the sake of availability.
Partition Tolerance:
Through the use of said Replica-Sets MongoDB also achieves the partition tolerance: As long as more than half of the se...
How many GCC optimization levels are there?
...00' '-v' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.1.0/cc1 [[noise]] hello_world.c -O100 -o /tmp/ccetECB5.
so -O was forwarded to both cc1 and collect2.
O in common.opt
common.opt is a GCC specific CLI option description format described in the internals doc...
How can I get the button that caused the submit from the form submit event?
...
Just a note to keep things current. As of right now, Safari sets activeElement to the document body when clicking on a submit button. I ran into this issue on Safari 9.1
– coderkevin
May 2 '16 at 20:38
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How to find if div with specific id exists in jQuery?
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This looks good but there's now a note w3.org/TR/html5/… that "relying on this will lead to brittle code".
– Kivi Shapiro
Apr 9 '18 at 18:39
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node.js remove file
...s.exists. Because according to the latest node.js documentation, fs.exists now deprecated.
For example:-
fs.stat('./server/upload/my.csv', function (err, stats) {
console.log(stats);//here we got all information of file in stats variable
if (err) {
return console.error(err);
}
...
How to access parent scope from within a custom directive *with own scope* in AngularJS?
... want to avoid something totally hacky or unmaintainable. For example, I know I could do it right now by taking the $scope from the preLink parameters and iterating over it's $sibling scopes to find the conceptual "parent".
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How to detect when an Android app goes to the background and come back to the foreground
...uch as the keyguard may be in front. Use onWindowFocusChanged(boolean) to know for certain that your activity is visible to the user (for example, to resume a game).developer.android.com/reference/android/app/…
– J-Rou
Apr 9 '13 at 15:50
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