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What is the proper way to check for null values?
I love the null-coalescing operator because it makes it easy to assign a default value for nullable types.
10 Answers
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add column to mysql table if it does not exist
... the script several times.
more info on continue handlers can be found at http://dev.mysql.com/doc/refman/5.0/en/declare-handler.html
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Design Pattern for Undo Engine
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Most examples I've seen use a variant of the Command-Pattern for this. Every user-action that's undoable gets its own command instance with all the information to execute the action and roll it back. You can then maintain a list of all the commands that have been execut...
How do I find an element that contains specific text in Selenium Webdriver (Python)?
I'm trying to test a complicated javascript interface with Selenium (using the Python interface, and across multiple browsers). I have a number of buttons of the form:
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Fixed page header overlaps in-page anchors
...sible element before each target. It works IE8+.
Here are more solutions:
http://nicolasgallagher.com/jump-links-and-viewport-positioning/
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Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...es are set to the value 'public' . In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True .
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Can local storage ever be considered secure? [closed]
...pto)
I presume the primary concern is someone with physical access to the computer reading the localStorage for your site, and you want cryptography to help prevent that access.
If someone has physical access you are also open to attacks other and worse than reading. These include (but are not lim...
Which types can be used for Java annotation members?
... public SimpleAnnotation[] value() default {};
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Examples taken from: http://web.archive.org/web/20131216093805/https://blogs.oracle.com/toddfast/entry/creating_nested_complex_java_annotations
(original URL: https://blogs.oracle.com/toddfast/entry/creating_nested_complex_java_annotations)
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How do I store data in local storage using Angularjs?
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For local storage there is a module for that look at below url:
https://github.com/grevory/angular-local-storage
and other link for HTML5 local storage and angularJs
http://www.amitavroy.com/justread/content/articles/html5-local-storage-with-angular-js/
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