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How do you calculate log base 2 in Java for integers?
...g a more general task - trying to implement int log(int x, int base):
The testing code:
static int pow(int base, int power) {
int result = 1;
for (int i = 0; i < power; i++)
result *= base;
return result;
}
private static void test(int base, int pow) {
int x = pow(base,...
Purge Kafka Topic
...he topic:
bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test
then re-create it:
bin/kafka-topics.sh --create --zookeeper localhost:2181 \
--replication-factor 1 --partitions 1 --topic test
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How to Get Element By Class in JavaScript?
...mentsBytagName has also a length property, for which the className/indexOf test is then done as well. Although this is not a problem in this case, a regular for loop would be more correct.
– Wolfgang Stengel
Mar 6 '13 at 15:56
...
Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...s under the impression that Linux thread creation was very cheap and after testing I determined that the overhead of function call in a new thread vs. a normal one is enormous. The overhead for creating a thread to handle a function call is something like 10000 or more times slower than a plain func...
Local Storage vs Cookies
...astructure. Modern web apps include 3rd party JavaScript libraries for A/B testing, funnel/market analysis, and ads. We use package managers like Bower to import other peoples’ code into our apps.
What if only one of the scripts you use is compromised? Malicious
JavaScript can be embedded o...
In Jinja2, how do you test if a variable is undefined?
... Additionally, you can use {% if variable is not defined %} to test the inverse.
– pbaranay
Feb 22 '17 at 15:37
...
Remove all line breaks from a long string of text
...ne characters
it takes such a multi-line string which may be messy e.g.
test_str = '\nhej ho \n aaa\r\n a\n '
and produces nice one-line string
>>> ' '.join([line.strip() for line in test_str.strip().splitlines()])
'hej ho aaa a'
UPDATE:
To fix multiple new-line character producin...
How do I disable the 'Debug / Close Application' dialog on Windows Vista?
...r me in fixing a VSTS Build Agent issue where I was trying to run Selenium tests. Thanks!
– Stu1986C
Sep 5 '18 at 9:59
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What are all the uses of an underscore in Scala?
...ses of the underscore is Scala _ [underscore] magic.
Examples:
def matchTest(x: Int): String = x match {
case 1 => "one"
case 2 => "two"
case _ => "anything other than one and two"
}
expr match {
case List(1,_,_) => " a list with three element and the first elem...
Specifying colClasses in the read.csv
...nly one columns.
So in your example you should use:
data <- read.csv('test.csv', colClasses=c("time"="character"))
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