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How to select where ID in Array Rails ActiveRecord without exception
... this is my preferred solution, it seems cleaner than the exception handling route
– Sam Saffron
Sep 17 '09 at 23:25
5
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How to add a “readonly” attribute to an ?
...erienced. Also, according to the jQuery docs the value should be number or string, not a boolean. api.jquery.com/attr/#attr2
– Luke
Oct 28 '13 at 19:48
add a comment
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How to cast List to List
...'s a more versatile solution:
List<Object> objects = Arrays.asList("String1", "String2");
List<String> strings = objects.stream()
.map(element->(String) element)
.collect(Collectors.toList());
There's a ton of benefits, but one is that...
Determine whether JSON is a JSONObject or JSONArray
...
I found better way to determine:
String data = "{ ... }";
Object json = new JSONTokener(data).nextValue();
if (json instanceof JSONObject)
//you have an object
else if (json instanceof JSONArray)
//you have an array
tokenizer is able to return more typ...
\r\n, \r and \n what is the difference between them? [duplicate]
I need to ask about the difference in a string between \r\n , \r and \n . How is a string affected by each?
4 Answers
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How do I redirect to the previous action in ASP.NET MVC?
...ic ActionResult MyNextAction()
{
return Redirect(Request.UrlReferrer.ToString());
}
alternatively, touching on what darin said, try this:
public ActionResult MyFirstAction()
{
return RedirectToAction("MyNextAction",
new { r = Request.Url.ToString() });
}
then:
public ActionResu...
How can I convert ereg expressions to preg in PHP?
...$str);
You can easily escape all delimiters and reserved characters in a string by using preg_quote:
$expr = preg_quote('/hello', '/');
preg_match('/^'.$expr.'/', $str);
Also, PCRE supports modifiers for various things. One of the most used is the case-insensitive modifier i, the alternative to...
How to construct a set out of list items in python?
...
If you have a list of hashable objects (filenames would probably be 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 gre...
What does = +_ mean in JavaScript
... to converts it into a number, if it isn't
already. [...] It can convert string representations of integers and
floats, as well as the non-string values true, false, and null.
Integers in both decimal and hexadecimal ("0x"-prefixed) formats are
supported. Negative numbers are supported (thou...
How do you use the “WITH” clause in MySQL?
I am converting all my SQL Server queries to MySQL and my queries that have WITH in them are all failing. Here's an example:
...