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How to convert ActiveRecord results into an array of hashes
... with serializable_hash and you can convert any ActiveRecord results to an Array with to_a, so for your example :
tasks_records = TaskStoreStatus.all
tasks_records.to_a.map(&:serializable_hash)
And if you want an ugly solution for Rails prior to v2.3
JSON.parse(tasks_records.to_json) # pleas...
Remove a string from the beginning of a string
...ame back to mention that this has an additional benefit of working with an array of subject strings. substr and strpos can't accept an array. There you go, a definite performance gain if you are dealing with an array. Cheers!
– Fr0zenFyr
Jul 11 '19 at 8:07
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mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...removed in php version 7.
Check $result before passing it to mysql_fetch_array. You'll find that it's false because the query failed. See the mysql_query documentation for possible return values and suggestions for how to deal with them.
$username = mysql_real_escape_string($_POST['username']);
$...
Relationship between SciPy and NumPy
...s the feeling I get about it: NumPy is meant to be a library for numerical arrays, to be used by anybody needing such an object in Python. SciPy is meant to be a library for scientists/engineers, so it aims for more rigourous theorethical mathematics (thus including complex number version of log10 a...
Uncaught SyntaxError: Unexpected token with JSON.parse
...
is it not an Array? Why is it an object. Objects start with { and arrays start with [? or am i false here
– user2396641
Sep 4 '16 at 17:20
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TypeError: 'str' does not support the buffer interface
...en switching from py2 to py3. In py2 plaintext is both a string and a byte array type. In py3 plaintext is only a string, and the method outfile.write() actually takes a byte array when outfile is opened in binary mode, so an exception is raised. Change the input to plaintext.encode('utf-8') to fix ...
How do I convert an array object to a string in PowerShell?
How can I convert an array object to string?
6 Answers
6
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Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
...Now to test this theory there are couple things you can do:
Allocate your array matice2 array like this matice2 [razmor, 4096], and run with razmor = 1024, 1025 or any size, and you should see very bad performance compared to what you had before. This is because you forcefully align all columns to ...
What is the difference between getFields and getDeclaredFields in Java reflection
...gt; exclusiveParent) {
List<Field> currentClassFields = Lists.newArrayList(startClass.getDeclaredFields());
Class<?> parentClass = startClass.getSuperclass();
if (parentClass != null &&
(exclusiveParent == null || !(parentClass.equals(exclusiveParent)))) {
...
Why is char[] preferred over String for passwords?
...) you can get rid of the data before garbage collection kicks in.
With an array, you can explicitly wipe the data after you're done with it. You can overwrite the array with anything you like, and the password won't be present anywhere in the system, even before garbage collection.
So yes, this is...