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Difference between := and = operators in Go
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Only = is the assignment operator.
:= is a part of the syntax of the Short variable declarations clause.
???? There are some rules though. See this other answer for more details.
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Android Studio suddenly cannot resolve symbols
... down the list of most things that would be helpful, but you could try:
Exit Android Studio
Back up your project
Delete all the .iml files and the .idea folder
Relaunch Android Studio and reimport your project
By the way, the error messages you see in the Project Structure dialog are bogus for t...
CardView layout_width=“match_parent” does not match parent RecyclerView width
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The docs for inflate:
Inflate a new view hierarchy from the specified xml resource. Throws
InflateException if there is an error.
Parameters
resource ID for an XML layout resource to load (e.g.,
R.layout.main_page) root
view to be the parent of the
generated hierarchy (if attach...
Openstreetmap: embedding map in webpage (like Google Maps)
...show your map. OpenLayers is the number one choice for this.
There is an example at http://wiki.openstreetmap.org/wiki/OpenLayers_Simple_Example and something more advanced at
http://wiki.openstreetmap.org/wiki/OpenLayers_Marker
and
http://wiki.openstreetmap.org/wiki/Openlayers_POI_layer_example...
How to make a window always stay on top in .Net?
...at is not covered by new topmost windows of another process. Raymond Chen explained why.
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How to set the text color of TextView in code?
In XML, we can set a text color by the textColor attribute, like android:textColor="#FF0000" . But how do I change it by coding?
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Fastest way to get the first object from a queryset in django?
...yModel.objects.filter(blah=blah).first()
They both swallow the resulting exception and return None if the queryset returns no objects.
These were added in Django 1.6, which was released in Nov 2013.
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How to check if a symlink exists
I'm trying to check if a symlink exists in bash. Here's what I've tried.
8 Answers
8
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Can I query MongoDB ObjectId by date?
... timestamp = new Date(timestamp);
}
/* Convert date object to hex seconds since Unix epoch */
var hexSeconds = Math.floor(timestamp/1000).toString(16);
/* Create an ObjectId with that hex timestamp */
var constructedObjectId = ObjectId(hexSeconds + "0000000000000000");
r...
How to grep a text file which contains some binary data?
...what man cat says about -v: -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB
– tommy.carstensen
Jan 3 '16 at 17:06
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