大约有 4,700 项符合查询结果（耗时：0.0161秒） [XML]
Is there shorthand for returning a default value if None in Python? [duplicate]
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123
return "default" if x is None else x
try the above.
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How to make a valid Windows filename from an arbitrary string?
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This isn't more efficient, but it's more fun :)
var fileName = "foo:bar";
var invalidChars = System.IO.Path.GetInvalidFileNameChars();
var cleanFileName = new string(fileName.Where(m => !invalidChars.Contains(m)).ToArray<char>());
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Remove the error indicator from a previously-validated EditText widget
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In Kotlin:
editText.error = null
Kotlin Extension Function:
To make it more readable, you could add this extension function
fun EditText.clearError() {
error = null
}
In Java:
editText.setError(null);
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How to get the current time as datetime
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You could also use NSDateFormatter's convenience method, e.g.,
func printTimestamp() {
let timestamp = NSDateFormatter.localizedStringFromDate(NSDate(), dateStyle: .MediumStyle, timeStyle: .ShortStyle)
print(timestamp)
}
printTimestamp() // Prints "Sep 9, 2014, 4:30 AM"
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Changing column names of a data frame
...k it was asked for data.frame, not data.table
– Helix123
Apr 16 '15 at 19:15
add a comment
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Tips for using Vim as a Java IDE? [closed]
...ymlink vi to vim.
You can get code completion with eclim
Or you can get vi functionality within Eclipse with viPlugin
Syntax highlighting is great with vim
Vim has good support for writing little macros like running ant/maven builds
Have fun :-)
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Best Practice: Software Versioning [closed]
...best practice how to version a software you develop in your spare time for fun, but nevertheless will be used by some people? I think it's necessary to version such software so that you know about with version one is talking about (e.g. for bug fixing, support, and so on).
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Fragment lifecycle - which method is called upon show / hide?
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123
Similar to activity lifecycle, Android calls onStart() when fragment becomes visible. onStop()...
How do I fix PyDev “Undefined variable from import” errors?
...nse error flag that Eclipse has suddenly decided to implement randomly for fun and profit(?)
– R Thiede
Jun 8 '12 at 8:48
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How to suppress scientific notation when printing float values?
...s really what you want? I don't: >>> print('{:f}'.format(0.000000123)) 0.000000
– duality_
May 22 '18 at 10:06
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