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How to save a dictionary to a file?
I have problem with changing a dict value and saving the dict to a text file (the format must be same), I only want to change the member_phone field.
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Django datetime issues (default=datetime.now())
...it looks like datetime.now() is being evaluated when the model is defined, and not each time you add a record.
Django has a feature to accomplish what you are trying to do already:
date = models.DateTimeField(auto_now_add=True, blank=True)
or
date = models.DateTimeField(default=datetime.now, bl...
“NODE_ENV” is not recognized as an internal or external command, operable command or batch file
...s would be
SET NODE_ENV=development
node foo.js
running in the same command shell. You mentioned set NODE_ENV did not work, but wasn't clear how/when you executed it.
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Why do Objective-C files use the .m extension?
Since I started learning Objective-C and Cocoa, I've been wondering why they have chosen the extension .m for the implementation files - was it supposed to mean something, or was it just a random letter?
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Sass - Converting Hex to RGBa for background opacity
...the hex color into RGB components, though, you can use the red(), green(), and blue() functions to do so:
$red: red($color);
$green: green($color);
$blue: blue($color);
background: rgb($red, $green, $blue); /* same as using "background: $color" */
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Purpose of #!/usr/bin/python3
...ey would start with #!/usr/bin/python3 on the first line. I don't understand why we have this.
6 Answers
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Is the 'override' keyword just a check for a overridden virtual method?
As far as I understand, the introduction of override keyword in C++11 is nothing more than a check to make sure that the function being implemented is the override ing of a virtual function in the base class.
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EditText underline below text property
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Also works on Xamarin for Android, in your custom renderer OnElementChanged you can do Control.Background.SetColorFilter(Android.Graphics.Color.White, PorterDuff.Mode.SrcIn);
– David Conlisk
Feb 16 '16 at 12:33
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text-overflow:ellipsis in Firefox 4? (and FF5)
...TextBox').val().length > limit) {
// -4 to include the ellipsis size and also since it is an index
var trimmedText = $('#limitedWidthTextBox').val().substring(0, limit - 4);
trimmedText += ellipsis;
$('#limitedWidthTextBox').val(trimmedText);
}
I understand that there should be som...
How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script?
... up with no data in the file.
You can't do it the other way round (with standard 'tr').
If you know how to enter carriage return into a script (control-V, control-M to enter control-M), then:
sed 's/^M$//' # DOS to Unix
sed 's/$/^M/' # Unix to DOS
where the '^M' is the control-M charact...