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Fastest way to copy file in node.js
...perations with the file system (copying/reading/writing etc). I'd like to know which methods are the fastest, and I'd be happy to get an advice. Thanks.
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How to convert an ArrayList containing Integers to primitive int array?
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much easier now in Java8: integers.stream().mapToInt(Integer::valueOf).toArray
– Manish Patel
Oct 23 '15 at 21:18
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“Code too large” compilation error in Java
...i didnt use your suggestion , though i am eager to try it next time.. have now used a database to store this information , and 've modified the rest of the code accordingly..
– trinity
Mar 11 '10 at 18:05
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How to fix committing to the wrong Git branch?
...ure
git stash pop # skip if all changes were committed
Now you have your master branch equals to origin/master and all new commits are on my_feature. Note that my_feature is a local branch, not a remote one.
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How to access the ith column of a NumPy multidimensional array?
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[3, 4],
[5, 6]])
As you already know from other answers, to get it in the form of "row vector" (array of shape (3,)), you use slicing:
arr_c1_ref = arr[:, 1] # creates a reference to the 1st column of the arr
arr_c1_copy = arr[:, 1].copy() # creates a cop...
How to change string into QString?
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Seems it's fixed now, and is pretty good, so I gave both this and the other +1.
– csl
Oct 27 '15 at 14:39
add a comme...
Serializing class instance to JSON
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The basic problem is that the JSON encoder json.dumps() only knows how to serialize a limited set of object types by default, all built-in types. List here: https://docs.python.org/3.3/library/json.html#encoders-and-decoders
One good solution would be to make your class inherit from J...
Getting a timestamp for today at midnight?
...eTimeImmutable())->format('Y-m-d H:i:s');
echo (new \DateTimeImmutable('now'))->format('Y-m-d H:i:s');
// will output: 2019-05-16 14:00:35
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Convert object string to JSON
...TML are valid):
<div data-object='{"hello":"world"}'></div>
Now, you can just use JSON.parse (or jQuery's $.parseJSON).
var str = '{"hello":"world"}';
var obj = JSON.parse(str);
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quick random row selection in Postgres
...e optimal solution if you want only one row selected, because you need to know the COUNT of the table to calculate the exact percentage.
To avoid a slow COUNT and use fast TABLESAMPLE for tables from 1 row to billions of rows, you can do:
SELECT * FROM my_table TABLESAMPLE SYSTEM(0.000001) LIMI...