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“message failed to fetch from registry” while trying to install any module
I can't install any node module from the npm.
14 Answers
14
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rgdal package installation
The issue here is not exactly how to plot maps through R, as I have found already a pretty nice example here , but rather how to make it work. In fact, I am unable to load library rgdal :
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Select datatype of the field in postgres
How do I get datatype of specific field from table in postgres ?
For example
I have the following table,
student_details (
stu_id integer,
stu_name varchar(30 ),
joined_date timestamp
);
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Convert list to array in Java [duplicate]
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Either:
Foo[] array = list.toArray(new Foo[0]);
or:
Foo[] array = new Foo[list.size()];
list.toArray(array); // fill the array
Note that this works only for arrays of reference types. For arrays of primitive types, use the tra...
Have a reloadData for a UITableView animate when changing
...TableView that has two modes. When we switch between the modes I have a different number of sections and cells per section. Ideally, it would do some cool animation when the table grows or shrinks.
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How to determine CPU and memory consumption from inside a process?
I once had the task of determining the following performance parameters from inside a running application:
9 Answers
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Is there a limit to the length of HTML attributes?
How long is too long for an attribute value in HTML?
8 Answers
8
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How to delete multiple values from a vector?
...2, 3, 5)
> a
[1] 10 5 2 7 1 6 3 4 8 9
> a %in% remove
[1] FALSE TRUE TRUE FALSE FALSE FALSE TRUE FALSE FALSE FALSE
> a [! a %in% remove]
[1] 10 7 1 6 4 8 9
Note that this will silently remove incomparables (stuff like NA or Inf) as well (while it will keep duplicate v...
Get push notification while App in foreground iOS
I am using push notification service in my app. When app is in background I am able to see notification on notification screen(screen shown when we swipe down from top of iOS device). But if application is in foreground the delegate method
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How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
... simplest way to do this is
import datetime
epoch = datetime.datetime.utcfromtimestamp(0)
def unix_time_millis(dt):
return (dt - epoch).total_seconds() * 1000.0
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