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Null vs. False vs. 0 in PHP
...good "nothing" entities.
What is the difference, specifically in PHP? Does it have something to do with === ?
18 Answ...
When should I use a composite index?
...you're always querying two dimensions, a composite index is the way to go, doesn't really matter which is first (most probably).
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Immutability of Strings in Java
...e whenever you wonder how something really works) you can see that what it does is the following:
If there is one or more occurrences of oldChar in the current string, make a copy of the current string where all occurrences of oldChar are replaced with newChar.
If the oldChar is not present in the ...
How to open multiple pull requests on GitHub
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This does not solve the issue: When I try to create a PR both branches (with at least one commit each) are compared. What am I doing wrong?
– MERose
Dec 28 '16 at 18:24
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How can I truncate a double to only two decimal places in Java?
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this doesn't work for me Math.floor(9.62 * 100) / 100 gives 9.61
– Mani
Jan 30 '14 at 21:30
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Python function overloading
I know that Python does not support method overloading, but I've run into a problem that I can't seem to solve in a nice Pythonic way.
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Oracle Differences between NVL and Coalesce
... level <= 10000
)
This understands that 1 is not a NULL and does not evaluate the second argument.
SYS_GUID's are not generated and the query is instant.
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How to remove line breaks from a file in Java?
... "");
This is necessary because Strings are immutable -- calling replace doesn't change the original String, it returns a new one that's been changed. If you don't assign the result to text, then that new String is lost and garbage collected.
As for getting the newline String for any environment...
Eliminate space before \begin{itemize} [closed]
...the vertical space before the list is still there - hence IMHO this answer does not work.
– Robert
Nov 1 '12 at 15:00
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How to use mongoimport to import csv
...ion of MongoDB?
$ cat > locations.csv
Name,Address,City,State,ZIP
Jane Doe,123 Main St,Whereverville,CA,90210
John Doe,555 Broadway Ave,New York,NY,10010
ctrl-d
$ mongoimport -d mydb -c things --type csv --file locations.csv --headerline
connected to: 127.0.0.1
imported 3 objects
$ mongo
MongoD...