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CSS Display an Image Resized and Cropped
...elative on the containing div. If you don't, I've found that IE won't actually clip the image.
– Frank Schwieterman
Jun 26 '09 at 22:56
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How to test if a string is JSON or not?
I have a simple AJAX call, and the server will return either a JSON string with useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message.
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Why is Go so slow (compared to Java)?
...n spends runtime supporting language features that the benchmark doesn't really need. In most compiled languages a sufficiently clever compiler could in theory strip out what isn't needed, but there comes a point where you're rigging the demo, since very few real users of the language would write pr...
Can a class extend both a class and implement an Interface
Can a class extend both an interface and another class in PHP?
Basically I want to do this:
3 Answers
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Set transparent background using ImageMagick and commandline prompt
...owing:
convert test.png -transparent white transparent.png
That changed all the white in the test.png to transparent.
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How to convert 1 to true or 0 to false upon model fetch
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All you need is convert string to int with + and convert the result to boolean with !!:
var response = {"isChecked":"1"};
response.isChecked = !!+response.isChecked
You can do this manipulation in the parse method:
parse:...
Can't update Macports (with Mac OS X Mavericks)
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Install the "Command Line Tools" first:
sudo xcode-select --install
(Explicitly agreeing to the license is sometimes necessary via "sudo xcodebuild -license")
Then upgrade the ports:
sudo port -v selfupdate
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PDO's query vs execute
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query runs a standard SQL statement and requires you to properly escape all data to avoid SQL Injections and other issues.
execute runs a prepared statement which allows you to bind parameters to avoid the need to escape or quote the parameters. execute will also perform better if you are repeat...
“Unsafe JavaScript attempt to access frame with URL…” error being continuously generated in Chrome w
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You could allow cross-domain requests during testing by running chrome with the --disable-web-security command line option. This should probably get rid of the error (and allow FB to spy on your testing ;)
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ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
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ComponentGroup 扩展解决了 App Inventor 中的两个常见问题：
内容变化检测：无需使用复杂的定时器和值比较即可检测组件内容是否被修改
批量启用/禁用：一次性启用或禁用一组组件（例如在考试期间禁用输入区域）
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