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How to create multidimensional array
...}
arr[i] = columns;
}
return arr;
}
Here is some code to test the definition:
var nums = Array.matrix(5,5,0);
print(nums[1][1]); // displays 0
var names = Array.matrix(3,3,"");
names[1][2] = "Joe";
print(names[1][2]); // display "Joe"
We can also create a two-dimensional array a...
static linking only some libraries
...ly linking in of a specific library. Example:
# echo "int main() {}" > test.cpp
# c++ test.cpp /usr/lib/libX11.a
# ldd a.out
linux-vdso.so.1 => (0x00007fff385cc000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f9a5b233000)
libm.so.6 => /lib/libm.so.6 (0x00007f9a5afb0000)
libgcc_s....
jQuery how to find an element based on a data-attribute value?
...;b>').data('x', 1).filterByData('x').length // output: 1
// test data
function extractData() {
log('data-prop=val ...... ' + $('div').filterByData('prop', 'val').length);
log('data-prop .......... ' + $('div').filterByData('prop').length);
log('data-random ........ ' + $('di...
Detect Safari using jQuery
...gger !== 'undefined';
var is_safari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
Usage:
if (is_safari) alert('Safari');
Or for Safari only, use this :
if ( /^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {alert('Its Safari');}
...
Difference between assertEquals and assertSame in phpunit?
...ne is an int, basically:
'2204' !== 2204
assertSame('2204', 2204) // this test fails
assertEquals
"Reports an error identified by $message if the two variables $expected and $actual are not equal."
assertEquals does not appear to take datatype into consideration so using the above example o...
Create PostgreSQL ROLE (user) if it doesn't exist
... with correct exception and sqlstate propagation:
DO $$
BEGIN
CREATE ROLE test;
EXCEPTION WHEN duplicate_object THEN RAISE NOTICE '%, skipping', SQLERRM USING ERRCODE = SQLSTATE;
END
$$;
Test output (called two times via DO and then directly):
$ sudo -u postgres psql
psql (9.6.12)
Type "help" fo...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...
It also helps with the "rule" of one assertion per test and blends more easily with BDD-style specifications.
– Nils Wloka
Nov 20 '09 at 14:10
2
...
Does JavaScript have a built in stringbuilder class?
...cked the performance on http://jsperf.com/javascript-concat-vs-join/2.
The test-cases concatenate or join the alphabet 1,000 times.
In current browsers (FF, Opera, IE11, Chrome), "concat" is about 4-10 times faster than "join".
In IE8, both return about equal results.
In IE7, "join" is about 100 ...
What's is the difference between train, validation and test set, in neural networks?
...ntinue training
Once you're finished training, then you run against your testing set and verify that the accuracy is sufficient.
Training Set: this data set is used to adjust the weights on the neural network.
Validation Set: this data set is used to minimize overfitting. You're not adjusting th...
Django filter queryset __in for *every* item in list
...ries.
You also have the option of using custom queries.
Some examples
Test setup:
class Photo(models.Model):
tags = models.ManyToManyField('Tag')
class Tag(models.Model):
name = models.CharField(max_length=50)
def __unicode__(self):
return self.name
In [2]: t1 = Tag.obje...