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Replace a value if null or undefined in JavaScript
...ar filter2 = options.filters[1] || ''; // is ''
That can be accessed by index.
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Spark java.lang.OutOfMemoryError: Java heap space
... and nested case classes). If possible try to only use primitive types and index all non-primitives especially if you expect a lot of duplicates. Choose WrappedArray over nested structures whenever possible. Or even roll out your own serialisation - YOU will have the most information regarding how ...
How do you embed binary data in XML?
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XML is so versatile...
<DATA>
<BINARY>
<BIT index="0">0</BIT>
<BIT index="1">0</BIT>
<BIT index="2">1</BIT>
...
<BIT index="n">1</BIT>
</BINARY>
</DATA>
XML is like violence - If it doesn't so...
access denied for load data infile in MySQL
I use MySQL queries all the time in PHP, but when I try
10 Answers
10
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How do I rename all folders and files to lowercase on Linux?
..." "${DST}" || echo "${SRC} was not renamed"
fi
done
P.S.
The latter allows more flexibility with the move command (for example, "svn mv").
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Mongo interface [closed]
...eat features, easy setup.
http://rockmongo.com/
If you don't want to install anything ... you can use MongoHQ's web interface (even if you your MongoDB isn't on MongoHQ.)
https://mongohq.com/home
Mac OS X
While MongoHub had been a decent option for a while it's bugs make it virtually unusable a...
How do I rename a column in a SQLite database table?
...ame is changed both within the table definition itself and also within all indexes, triggers, and views that reference the column. If the column name change would result in a semantic ambiguity in a trigger or view, then the RENAME COLUMN fails with an error and no changes are applied.
Image sour...
jQuery : eq() vs get()
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.get() returns an array, .get(index) returns the single element at the index from the array.
– Mohamed Fasil
Aug 10 '14 at 19:23
a...
Using an RDBMS as event sourcing storage
...ifically with SQL, we found that performance really became a bottleneck if indexes and partitions weren't adequately used. Remember events will needs to be streamed in reverse order if you are using snapshots. We tried a few different indexes and found that in practise, some additional indexes were ...
Pimpl idiom vs Pure virtual class interface
...ures is enough. OTOH in pure abstract case they effectively link by vtable index so reordering methods or inserting in the middle will break compatibility.
– SnakE
Nov 25 '15 at 11:13
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