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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...t empty strings ('') to 0, but not other "invalid input syntax" or "out of range" input:
CREATE OR REPLACE FUNCTION convert_to_int(text)
RETURNS int AS
$func$
BEGIN
IF $1 = '' THEN -- special case for empty string like requested
RETURN 0;
ELSE
RETURN $1::int;
END IF;
EXCEPT...
What is the difference between Cloud, Grid and Cluster? [closed]
...lar hardware (if not identical). Grid computing typically occurs on a wide range of hardware as a result of its distributed (both physical location and ownership) nature.
– Paul Simpson
Mar 24 '12 at 4:49
...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...o get here. The strong points of
Lucene are its scalability, a large
range of features and an active
community of developers. Using bare
Lucene requires programming in Java.
If you are starting afresh, the tool for you in the Lucene family is Solr, which is much easier to set up than ba...
Best practices for overriding isEqual: and hash
...e hashes returned by those values are evenly distributed across the entire range of possible hash values. This will significantly improve your performance.
There are a number of hashing algorithms out there, including several listed here. I try to avoid creating new hash algorithms as it can have...
Remap values in pandas column with a dict
...E", 6: "F", 7: "G", 8: "H" }
df = pd.DataFrame({ 'col1': np.random.choice( range(1,9), 100000 ) })
and testing with %timeit, it appears that map is approximately 10x faster than replace.
Note that your speedup with map will vary with your data. The largest speedup appears to be with large dict...
How can I do test setup using the testing package in Go
...stCase := setupTestCase(t)
defer teardownTestCase(t)
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
teardownSubTest := setupSubTest(t)
defer teardownSubTest(t)
result := Sum(tc.a, tc.b)
if result != tc.expected {
...
“Server” vs “Data Source” in connection string
...
I've been googlearching for the reason for the range of equivalent keywords in the connection strings. This far, I haven't found a good explanation. I'm assuming it's due to historial reasons and users from different "worlds" coming together. Is there another reason?
...
Is there a zip-like function that pads to longest length in Python?
...:
yield None
gens = [g(l) for l in lists]
for _ in range(max(map(len, lists))):
yield tuple(next(g) for g in gens)
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stash@{1} is ambiguous?
...n be configured either way, bash only expands curly brackets with comma or range between them, other shells may behave one or other way).
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What size should TabBar images be?
...ced that I said "about 25", so I would consider 23 to be inside that about range.
– rsc
Dec 16 '17 at 18:29
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