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Using comma as list separator with AngularJS
... .join because it allows the elements in the list to each be members of an array, like: <b ng-repeat="friend in friends">{{friend.email}}{{{true: '', false: ', '}[$last]}}</b>
– Ryan Marcus
May 25 '13 at 20:25
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mongodb count num of distinct values per field/key
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MongoDB has a distinct command which returns an array of distinct values for a field; you can check the length of the array for a count.
There is a shell db.collection.distinct() helper as well:
> db.countries.distinct('country');
[ "Spain", "England", "France", "Aust...
Iterator Loop vs index loop [duplicate]
... 2).
Disadvantages: only for sequential random access containers (vector, array, deque), doesn't work for list, forward_list or the associative containers. Also the loop control is a little verbose (init, check, increment). People need to be aware of the 0-based indexing in C++.
2) iterator-based ...
How to remove extension from string (only real extension!)
... Looking at the commits on php.net there is an idea about working with an array...which I think could be improved using something such as array-walk
– CrandellWS
Feb 3 '15 at 16:10
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How to check if a table exists in a given schema
...lname_exists(anyThing), relname_normalized(anyThing) and relnamechecked_to_array(anyThing). All checks from pg_catalog.pg_class table, and returns standard universal datatypes (boolean, text or text[]).
/**
* From my old SwissKnife Lib to your SwissKnife. License CC0.
* Check and normalize to arr...
jQuery : eq() vs get()
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.get() and .eq() both return a single "element" from a jQuery object array, but they return the single element in different forms.
.eq() returns it as a jQuery object, meaning the DOM element is wrapped in the jQuery wrapper, which means that it accepts jQuery functions.
.get() returns an ar...
ng-options with simple array init
...I prefer this method over ng-options anyway, as ng-options only works with arrays. ng-repeat also works with json-like objects.
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How to convert a std::string to const char* or char*?
... automatically. There are two immediate ways to solve this.
boost::scoped_array
boost::scoped_array will delete the memory for you upon going out of scope:
std::string str;
boost::scoped_array<char> writable(new char[str.size() + 1]);
std::copy(str.begin(), str.end(), writable.get());
writa...
Simple Digit Recognition OCR in OpenCV-Python
... is pressed, it resizes this box to 10x10 and saves 100 pixel values in an array (here, samples) and corresponding manually entered digit in another array(here, responses).
Then save both the arrays in separate txt files.
At the end of manual classification of digits, all the digits in the train d...
What is the difference between a var and val definition in Scala?
...class B(n: Int) {
val value = new A(n)
}
object Test {
def main(args: Array[String]) {
val x = new B(5)
x = new B(6) // Doesn't work, because I can't replace the object created on the line above with this new one.
x.value = new A(6) // Doesn't work, because I can't replace the objec...