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How to differentiate between time to live and time to idle in ehcache
...nables cached object to be kept in as long as it is requested in periods shorter than timeToIdleSeconds. timeToLiveSeconds will make the cached object be invalidated after that many seconds regardless of how many times or when it was requested.
Let's say that timeToIdleSeconds = 3. Then the object ...
Finding index of character in Swift String
...ent byte lengths. That's why we have to use string.characters.count (count or countElements in Swift 1.x) to get the number of characters. That also applies to positions. The _position is probably an index into the raw array of bytes and they don't want to expose that. The String.Index is meant to p...
using jquery $.ajax to call a PHP function
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Use $.ajax to call a server context (or URL, or whatever) to invoke a particular 'action'. What you want is something like:
$.ajax({ url: '/my/site',
data: {action: 'test'},
type: 'post',
success: function(output) {
...
Is python's sorted() function guaranteed to be stable?
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Yes, the intention of the manual is indeed to guarantee that sorted is stable and indeed that it uses exactly the same algorithm as the sort method. I do realize that the docs aren't 100% clear about this identity; doc patches are always happily accepted!
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How can I make a div not larger than its contents?
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@leif81 You can use a span or a div or ul or anything else, the important part is for the container you would like to be minimum width have the CSS property display: inline-block
– miahelf
Nov 17 '11 at 8:23
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How do I do a case-insensitive string comparison?
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That doesn’t always work. Consider for exanmple that there are two Greek sigmas, one only used at the end. The string Σίσυφος (“Sísyphos”, or better “Síſyphos”) has all three: uppercase at the front, lowercase final at the end...
Can table columns with a Foreign Key be NULL?
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Yes, you can enforce the constraint only when the value is not NULL. This can be easily tested with the following example:
CREATE DATABASE t;
USE t;
CREATE TABLE parent (id INT NOT NULL,
PRIMARY KEY (id)
) ENGINE=INNOD...
Does Java have a HashMap with reverse lookup?
I have data that is organized in kind of a "key-key" format, rather than "key-value". It's like a HashMap, but I will need O(1) lookup in both directions. Is there a name for this type of data structure, and is anything like this included in Java's standard libraries? (or maybe Apache Commons?)
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Reset CSS display property to default value
Is it possible to override the display property with its default value? For example if I have set it to none in one style, and I want to override it in a different with its default.
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difference between offsetHeight and clientHeight
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clientHeight:
Returns the height of the visible area for an object, in pixels. The value contains the height with the padding, but it does not include the scrollBar, border, and the margin.
offsetHeight:
Returns the height of the visible area for an object, in pixels. The ...