大约有 18,341 项符合查询结果（耗时：0.0350秒） [XML]
Ruby on Rails Callback, what is difference between :before_save and :before_create?
...reate Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ?
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How to iterate over associative arrays in Bash
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@DennisWilliamson, thanks a lot. I didn't have this on my mind.
– Michael-O
May 23 '14 at 7:07
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Parsing JSON with Unix tools
...ady installed on your system, like Python using the json module, and so avoid any extra dependencies, while still having the benefit of a proper JSON parser. The following assume you want to use UTF-8, which the original JSON should be encoded in and is what most modern terminals use as well:
Pytho...
Why JSF calls getters multiple times
...n {
private SomeObject someProperty;
@PostConstruct
public void init() {
// In @PostConstruct (will be invoked immediately after construction and dependency/property injection).
someProperty = loadSomeProperty();
}
public void onload() {
// Or in GET ac...
How to change font face of Webview in Android?
...om font. I'm using webview in developing an bilingual browser app for Android.
14 Answers
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Listening for variable changes in JavaScript
...rs and setters): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters
You can define an object like this, in which aInternal represents the field a:
x = {
aInternal: 10,
aListener: function(val) {},
set a(val) {
this.aInternal = ...
The backend version is not supported to design database diagrams or tables
... I run the exe offered at: microsoft.com/en-us/download/confirmation.aspx?id=29062 I get a message saying no updates are available. I cannot find any way to update SMSS - even though it sounds insanely dumb.
– JensOlsen
Aug 5 '14 at 19:31
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How to find out which fonts are referenced and which are embedded in a PDF document
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name type emb sub uni object ID
------------------------------------ ----------------- --- --- --- ---------
BAAAAA+Arial-Black TrueType yes yes yes 53 0
CAAAAA+Tahoma TrueType yes yes yes ...
What are the rules for calling the superclass constructor?
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@hagubear, only valid for constructors, AFAIK
– luke
Oct 31 '14 at 12:24
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Debugging iframes with Chrome developer tools
...ole to look at variables and DOM elements in my app, but the app exists inside an iframe (since it's an OpenSocial app).
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