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Best practice to validate null and empty collection in Java
...se CollectionUtils to check against both Collections (List, Array) and Map etc.
if(CollectionUtils.isEmpty(...)) {...}
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Importing variables from another file?
...ython is highly preferred Language for
Data Science and Machine Learning etc. ;
And this is the picture of project structure
Where I am accessing variables from .env file where the API links and
Secret keys reside .
General Structure:
from <File-Name> import *
...
Is volatile expensive?
...functions providing additional functionality like getAndSet, compareAndSet etc., so from a performance point of view using it is just useful if you need the added functionality. But I wonder why you refer to the OS here? The functionality is implemented in CPU opcodes directly. And does this imply t...
Using Kafka as a (CQRS) Eventstore. Good idea?
...ng, there is a stream (topic) of events per entity (such as user, product, etc). This way, the current state of an entity can be reconstituted by re-applying all events in the stream. Each Kafka topic consists of one or more partitions and each partition is stored as a directory on the file system. ...
C99 stdint.h header and MS Visual Studio
...thout this header I have no definitions for useful types such as uint32_t, etc.
7 Answers
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In PyCharm, how to go back to last location?
...remember, there is some shortcuts for rotating / mirroring / duplicating / etc. shortcuts in Intel Graphics module.
– awesoon
Feb 19 '15 at 3:45
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Count number of rows within each group
..., there is no need to rename each variable in by= like list(year=df1$year) etc. A data.frame is a list already so aggregate(df1[c("Count")], by=df1[c("Year", "Month")], FUN=sum, na.rm=TRUE) will work.
– thelatemail
Jul 17 '19 at 22:27
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Print second last column/field in awk
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As a mnemonic, this behavior is the same as C/Java etc. int x = ++i int x = i++, prefix means increment first; postfix means increment later (assignment first).
– Weekend
Dec 11 '19 at 7:20
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How to check with javascript if connection is local host?
...ral / "catch-all" solution that would also cover cases of using 127.0.0.1, etc.?
– jacobq
Oct 10 '12 at 18:21
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Why cannot cast Integer to String in java?
....toString(myInt, radix) that lets you specify whether you want hex, octal, etc. If you want to be consistent in your code (purely aesthetically, I guess) the second form can be used in more places.
Edit 2 I assumed you meant that your integer was an int and not an Integer. If it's already an Intege...