大约有 740 项符合查询结果（耗时：0.0063秒） [XML]
Getting indices of True values in a boolean list
...imeit np.where(t)
179 µs ± 593 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)
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How do you do block comments in YAML?
... @BrunoBronosky: instead of all those @q, you can simply do 6@q or 10000@q if you like.
– bodo
Apr 26 '18 at 11:55
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What's the equivalent of Java's Thread.sleep() in JavaScript? [duplicate]
... => {
setTimeout(resolve, time || 1000);
});
}
await sleep(10000); //this method wait for 10 sec.
Note : async / await not actualy stoped thread like Thread.sleep but simulate it
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Measure execution time for a Java method [duplicate]
...m.currentTimeMillis();
long total = 0;
for (int i = 0; i < 10000000; i++) {
total += i;
}
long stopTime = System.currentTimeMillis();
long elapsedTime = stopTime - startTime;
System.out.println(elapsedTime);
}
}
With a StopWatch class
You can use...
MySQL and GROUP_CONCAT() maximum length
...
SET SESSION group_concat_max_len = 1000000;
is a temporary, session-scope, setting. It only applies to the current session You should use it like this.
SET SESSION group_concat_max_len = 1000000;
select group_concat(column) from table group by column
You...
In Python, how do I index a list with another list?
... the list comprehension 2.5x faster than the loop (1000 elements, repeated 10000 times).
– James Hopkin
Jun 18 '09 at 12:00
2
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Batch file. Delete all files and folders in a directory
... If you have 'special' characters in your filenames, first do chcp 10000 to change encoding to UTF-16
– Demelziraptor
Oct 3 '14 at 2:24
3
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Yes or No confirm box using jQuery
...ialog({
modal: true,
title: 'Delete message',
zIndex: 10000,
autoOpen: true,
width: 'auto',
resizable: false,
buttons: {
Yes: function() {
// $(obj).removeAttr('onclick');
// $(obj).parent...
Drop rows with all zeros in pandas data frame
... larger dataset:
In [119]: bdf = pd.DataFrame(np.random.randint(0,2,size=(10000,4)))
In [120]: %timeit bdf[(bdf.T != 0).any()]
1000 loops, best of 3: 1.63 ms per loop
In [121]: %timeit bdf[(bdf.sum(axis=1) != 0)]
1000 loops, best of 3: 1.09 ms per loop
In [122]: %timeit bdf[bdf.values.sum(axis=1...
Delete topic in Kafka 0.8.1.1
...ill can program it, by
ZkClient zkClient = new ZkClient("localhost:2181", 10000);
zkClient.deleteRecursive(ZkUtils.getTopicPath("test2"));
Actually I do not recommend you delete topic on Kafka 0.8.1.1. I can delete this topic by this method, but if you check log for zookeeper, deletion mess it up...