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What does “Git push non-fast-forward updates were rejected” mean?
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GitHub has a nice section called "Dealing with “non-fast-forward” errors"
This error can be a bit overwhelming at first, do not fear.
Simply put, git cannot make the change on the remote without losing commits, so it refuses the push.
Usual...
“new” keyword in Scala
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Is it when we try to instantiate java objects only?
Not at all. There is two general cases when you ommit new in scala.
With singleton objects (that are oftenly used to store static functions and as a kind of factory similar to what you may seen in java):
scala> object LonelyGuy ...
How to use find command to find all files with extensions from list?
I need to find all image files from directory (gif, png, jpg, jpeg).
9 Answers
9
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Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine
...me is wanted (I, for example, store local time in one of my database since all I care is what time in the day is was and I don't keep track of where I was in term of time zones...), you can define the column as
"timestamp" TEXT DEFAULT (strftime('%Y-%m-%dT%H:%M','now', 'localtime'))
The %Y-%m-%d...
How would I get a cron job to run every 30 minutes?
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I've always used */30 with success but I don't recall an application of mine where it was too critical if it only ran once an hour so I don't think I've ever checked.
– Adam Hawes
Feb 25 '09 at 5:39
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How to specialize std::hash::operator() for user-defined type in unordered containers?
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You are expressly allowed and encouraged to add specializations to namespace std*. The correct (and basically only) way to add a hash function is this:
namespace std {
template <> struct hash<Foo>
{
size_t operator()(const...
What is a “Stub”?
...lar kinds of double:
Dummy objects are passed around but never actually used. Usually they are just used to fill parameter lists.
Fake objects actually have working implementations, but usually take some shortcut which makes them not suitable for production (an in memory database is a good...
Remote debugging a Java application
...ome people are cutting and pasting the invocation here. The answer I originally gave was relevant for the OP only. Here's a more modern invocation style (including using the more conventional port of 8000):
java -agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n <other arguments&...
How do you remove an array element in a foreach loop?
... Please see @Neils answer. You will encounter unexpected bugs, especially if you work with Array of stdClasses. Do you like unexpected behavior? Me not.
– happy_marmoset
Sep 14 '16 at 11:44
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Bootstrap: how do I change the width of the container?
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Theoretically, there are infinite combinations that match 1000px. An example: 12*65 + 11*20 = 1000 (there are only 11 gutters between columns).
– albertedevigo
Jun 14 '13 at 14:09
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