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How do you delete an ActiveRecord object?
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It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent associ...
How can I make gdb save the command history?
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edited Aug 17 '17 at 3:44
community wiki
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Get week of year in JavaScript like in PHP
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19 Answers
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Removing ul indentation with CSS
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edited Feb 11 '19 at 15:53
TylerH
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JavaScript exponents
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a**b // will rise a to the power b
Now it is already implemented in Edge14, Chrome52, and also it is available with traceur or babel.
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Python nested functions variable scoping [duplicate]
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10 Answers
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POST data in JSON format
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170
Not sure if you want jQuery.
var form;
form.onsubmit = function (e) {
// stop the regular ...
How to convert a negative number to positive?
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216
>>> n = -42
>>> -n # if you know n is negative
42
>>> abs(n) ...
How to get the input from the Tkinter Text Widget?
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132
To get Tkinter input from the text box, you must add a few more attributes to the normal .get(...
Appending to an existing string
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165
You can use << to append to a string in-place.
s = "foo"
old_id = s.object_id
s <<...