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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...
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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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...
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)))) {
...
The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
...strings I have to put several restrictions in the where-clause from a list/array/collection. Should look like this:
32 Answ...
Strings in a DataFrame, but dtype is object
...The dtype object comes from NumPy, it describes the type of element in a ndarray. Every element in a ndarray must has the same size in byte. For int64 and float64, they are 8 bytes. But for strings, the length of the string is not fixed. So instead of save the bytes of strings in the ndarray directl...