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Avoid duplicates in INSERT INTO SELECT query in SQL Server
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Using NOT EXISTS:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1.name
FROM TABLE_1 t1
WHERE NOT EXISTS(SELECT id
FROM TABLE_2 t2
WHERE t2.id = t1.id)
Using NOT IN:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1.name
F...
How to Update Multiple Array Elements in mongodb
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15 Answers
15
Active
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Is there any way to use a numeric type as an object key?
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109
No, this is not possible. The key will always be converted to a string. See Property Accessor...
Measure execution time for a Java method [duplicate]
...em.out.println(stopTime - startTime);
In Java 8 (output format is ISO-8601):
Instant start = Instant.now();
Thread.sleep(63553);
Instant end = Instant.now();
System.out.println(Duration.between(start, end)); // prints PT1M3.553S
Guava Stopwatch:
Stopwatch stopwatch = Stopwatch.createStarted()...
A weighted version of random.choice
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312
Since version 1.7.0, NumPy has a choice function that supports probability distributions.
from...
Compute a confidence interval from sample data
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168
import numpy as np
import scipy.stats
def mean_confidence_interval(data, confidence=0.95):
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How do I use the includes method in lodash to check if an object is in the collection?
...s will work because there is only one instance of {"b": 2}:
var a = {"a": 1}, b = {"b": 2};
_.includes([a, b], b);
> true
On the other hand, the where(deprecated in v4) and find methods compare objects by their properties, so they don't require reference equality. As an alternative to includes...