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Immutable vs Mutable types
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What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut" x?
Well you agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it change...
What is the best way to call a script from another script?
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The usual way to do this is something like the following.
test1.py
def some_func():
print 'in test 1, unproductive'
if __name__ == '__main__':
# test1.py executed as script
# do something
some_func()
service.py
import te...
How to do something before on submit? [closed]
i have a form which has a button that submits the form. I need to do something before submits happen. I tried doing onClick on that button but it happens after the submit.
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How do I instantiate a Queue object in java?
... interface. It is not needed except in those rare cases where you wish to do something special while providing the rest of your program with a Queue.
public class MyQueue<T extends Tree> implements Queue<T> {
public T element() {
... your code to return an element goes here ......
Bootstrap trying to load map file. How to disable it? Do I need to do it?
...hing is, I see in GH dev tools, that it's trying to get .map.css file. Why does it want to do so? How to disable it? Do I need to disable it? To not to have an error mark in dev tools, I added that map file, after which all styles are displayed as they defined in less files, which doesn't help me mu...
How do I add comments to package.json for npm install?
... a simple package.json file and I want to add a comment. Is there a way to do this, or are there any hacks to make this work?
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Is assert evil? [closed]
... religious reasons, then just use goto rather than obfuscating what you're doing. In other words: if you can prove you really need goto, and the only alternative is to enact a load of pointless scaffolding that ultimately does the same thing but without alterting the Goto Police... then just use got...
Remove last item from array
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Doesn't work for one-element arrays: [1].splice(-1, 1) => [1]
– Tvaroh
Nov 1 '14 at 8:38
144
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Best way to do multiple constructors in PHP
...ruct functions with unique argument signatures in a PHP class. I'd like to do this:
21 Answers
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How do I pass variables and data from PHP to JavaScript?
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There are actually several approaches to do this. Some require more overhead than others, and some are considered better than others.
In no particular order:
Use AJAX to get the data you need from the server.
Echo the data into the page somewhere, and use JavaScr...