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Using Python 3 in virtualenv
...is their a workaround? or is it just now completely useless to prepare an app?
– J. M. Becker
Sep 27 '16 at 21:33
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How to add default value for html ? [closed]
... to aid the user with data entry when the control has no value" [and it disappears as soon as user clicks into the textarea]. It will never act as "the default value" for the control. If you want that, you must put the desired text inside the Here is the actual default value, as per other answers he...
Rails 4: before_filter vs. before_action
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It is just syntax difference, in rails app there is CRUD, and seven actions basically by name index, new, create, show, update, edit, destroy.
Rails 4 make it developer friendly to change syntax before filter to before action.
before_action call method before th...
Read and write a String from text file
...r: .documentDirectory, in: .userDomainMask).first {
let fileURL = dir.appendingPathComponent(file)
//writing
do {
try text.write(to: fileURL, atomically: false, encoding: .utf8)
}
catch {/* error handling here */}
//reading
do {
let text2 = try String(c...
Default html form focus without JavaScript
...or those browsers not supporting HTML5. Something worth considering in any app.
– mvbrakel
Feb 19 '14 at 20:43
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Run a callback only if an attribute has changed in Rails
I have the following association in my app:
3 Answers
3
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Is there a Newline constant defined in Java like Environment.Newline in C#?
...is property isn't as useful as many people think it is. Just because your app is running on a Windows machine, for example, doesn't mean the file it's reading will be using Windows-style line separators. Many web pages contain a mixture of "\n" and "\r\n", having been cobbled together from dispara...
Cocoa: What's the difference between the frame and the bounds?
...nds have been exactly the same. That isn't always true, though. Look what happens if we rotate the view 20 degrees clockwise. (Rotation is done using transforms. See the the documentation and these view and layer examples for more information.)
Frame
origin = (20, 52) // These are just rough e...
Access key value from Web.config in Razor View-MVC3 ASP.NET
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@System.Configuration.ConfigurationManager.AppSettings["myKey"]
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Check whether a string is not null and not empty
...d to str.isBlank() which will also test for other Unicode white spaces)
Wrapped in a handy function:
public static boolean empty( final String s ) {
// Null-safe, short-circuit evaluation.
return s == null || s.trim().isEmpty();
}
Becomes:
if( !empty( str ) )
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