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How to execute a raw update sql with dynamic binding in rails
...
ActiveRecord::Base.connection has a quote method that takes a string value (and optionally the column object). So you can say this:
ActiveRecord::Base.connection.execute(<<-EOQ)
UPDATE foo
SET bar = #{ActiveRecord::Base.connection.quote(baz)}
EOQ
Note if you're in a Ra...
How to properly override clone method?
... Java API developers do it. (Either Josh Bloch or Neal Gafter)
Here is an extract from openJDK, ArrayList class:
public Object clone() {
try {
ArrayList<?> v = (ArrayList<?>) super.clone();
v.elementData = Arrays.copyOf(elementData, size);
v.modCount = 0;
...
Creating a constant Dictionary in C#
...fficient way to create a constant (never changes at runtime) mapping of string s to int s?
10 Answers
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No Multiline Lambda in Python: Why not?
... This is a simple ambiguity that must be solved by adding an extra set of parens, something that exists in many places already, e.g. generator expressions surrounded by other arguments, calling a method on an integer literal (although this need not be the case since a function name can...
How to amend several commits in Git to change author
...TES
the --no-edit flag makes sure the git commit --amend doesn't ask an extra confirmation
when you use git rebase -i, you can manually select the commits where to change the author,
the file you edit will look like this:
pick 897fe9e simplify code a little
pick abb60f9 add new feature
exec g...
What is the difference between angular-route and angular-ui-router?
...owerful. It supports everything the normal ngRoute can do as well as many extra functions.
Here are some common reason ui-router is chosen over ngRoute:
ui-router allows for nested views and multiple named views. This is very useful with larger app where you may have pages that inherit from oth...
SQlite Getting nearest locations (with latitude and longitude)
..., mult * radius, 270);
strWhere = " WHERE "
+ COL_X + " > " + String.valueOf(p3.x) + " AND "
+ COL_X + " < " + String.valueOf(p1.x) + " AND "
+ COL_Y + " < " + String.valueOf(p2.y) + " AND "
+ COL_Y + " > " + String.valueOf(p4.y);
COL_X is the name of ...
Why would one use nested classes in C++?
... BOX, BAG, CRATE
};
Product(ProductType t, ProductBoxType b, String name);
// the rest of the class: fields, methods
};
One then will call:
Product p(Product::FANCY, Product::BOX);
But when looking at code completion proposals for Product::, one will often get all the possibl...
Why does Google +1 record my mouse movements? [closed]
...oyed button like this, you'd expect a lot of collisions. Might explain the extra efforts.
– Yahel
Jul 24 '11 at 3:12
...
Using querySelector with IDs that are numbers
... selectors syntax
Attribute values must be a valid CSS identifiers or String.
Thus, digits or alphanumeric strings with leading digit does not qualify as a valid identifier.
If you are using an ID generator utility for generating an identifier, you might end up with alpha numeric ids with l...