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Default constructor vs. inline field initialization
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Initialisers are executed before constructor bodies. (Which has implications if you have both initialisers and constructors, the constructor code executes second and overrides an initialised value)
Initialisers are good when you always need t...
What is the most efficient way to create HTML elements using jQuery?
...div>');
some numbers on the suggestions so far (safari 3.2.1 / mac os x):
var it = 50000;
var start = new Date().getTime();
for (i = 0; i < it; ++i) {
// test creation of an element
// see below statements
}
var end = new Date().getTime();
alert( end - start );
var e...
What is the difference between `throw new Error` and `throw someObject`?
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Here is a good explanation about The Error object and throwing your own errors
The Error Object
Just what we can extract from it in an event of an error? The Error object in all browsers support the following two properties:
name: The na...
How to add a filter class in Spring Boot?
...ant to setup a third-party filter you can use FilterRegistrationBean.
For example the equivalent of web.xml
<filter>
<filter-name>SomeFilter</filter-name>
<filter-class>com.somecompany.SomeFilter</filter-class>
</filter>
<filter-mapping>
&l...
SQL - Rounding off to 2 decimal places
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Could you not cast your result as numeric(x,2)? Where x <= 38
select
round(630/60.0,2),
cast(round(630/60.0,2) as numeric(36,2))
Returns
10.500000 10.50
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Cannot push to Heroku because key fingerprint
...added my default SSH key for my machine. No matter what I did trying to fix my second account, it would not take until I removed my default key from the first account. SSH-AGENT will send the first key by default, causing this problem. The fix is to create specific keys for heroku (not the defaul...
How to construct a set out of list items in python?
...e strings, so they should count):
lst = ['foo.py', 'bar.py', 'baz.py', 'qux.py', Ellipsis]
you can construct the set directly:
s = set(lst)
In fact, set will work this way with any iterable object! (Isn't duck typing great?)
If you want to do it iteratively:
s = set()
for item in iterable...
Creating an object: with or without `new` [duplicate]
...mplest way to create an object, and is just the same as when you write int x = 0;
The second creates an object with dynamic storage duration and allows two things:
Fine control over the lifetime of the object, since it does not go out of scope automatically; you must destroy it explicitly using t...
CSS @font-face - what does “src: local('☺')” mean?
...e generator, you'll see that it was a gotcha by paul irish.
Here is the excerpt from his blog post:
And.. regarding @font-face syntax
I now recommend the bulletproof smiley variation over the original bulletproof syntax.
@font-face {
font-family: 'Graublau Web';
src: url('GraublauW...
Capistrano error tar: This does not look like a tar archive
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I had the same issue, until I realized I was pulling the nonexistent branch from git.
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