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Is local static variable initialization thread-safe in C++11? [duplicate]
...le the variable is being initialized, the concurrent execution shall wait for completion of the initialization.
Then there's a footnote:
The implementation must not introduce any deadlock around execution of the initializer.
So yes, you're safe.
(This says nothing of course about the subseq...
Split string on whitespace in Python [duplicate]
I'm looking for the Python equivalent of
4 Answers
4
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Inserting a string into a list without getting split into characters
...e most people know this but just to add: doing list2 = list1.append('foo') or list2 = list1.insert(0, 'foo') will result in list2 having a value of None. Both append and insert are methods that mutate the list they are used on rather than returning a new list.
– MoltenMuffins
...
How to take off line numbers in Vi?
For displaying line numbers in a file, I use command:
8 Answers
8
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Complex numbers usage in python [closed]
...
In python, you can put ‘j’ or ‘J’ after a number to make it imaginary, so you can write complex literals easily:
>>> 1j
1j
>>> 1J
1j
>>> 1j * 1j
(-1+0j)
The ‘j’ suffix comes from electrical engineering, where the v...
What’s the purpose of prototype? [duplicate]
...
Using the prototype makes for faster object creation, since that function does not have to be re-created each time a new object is created.
When you do this:
function animal(){
this.name = 'rover';
this.set_name = function(name){
thi...
Have a variable in images path in Sass?
...igure out if this is possible in pure Sass (the actual web project is not RoR, so can't use asset_pipeline or any of that fancy jazz).
...
How to send HTML-formatted email? [duplicate]
...ds automatic emails using Windows Task Scheduler. Now I want to send HTML-Formatted email using the following method that I wrote for sending emails.
...
How to return images in flask response? [duplicate]
...
You use something like
from flask import send_file
@app.route('/get_image')
def get_image():
if request.args.get('type') == '1':
filename = 'ok.gif'
else:
filename = 'error.gif'
return send_file(filename, mimetype='image/gif')
to sen...
How to check if a class inherits another class without instantiating it? [duplicate]
...
To check for assignability, you can use the Type.IsAssignableFrom method:
typeof(SomeType).IsAssignableFrom(typeof(Derived))
This will work as you expect for type-equality, inheritance-relationships and interface-implementations bu...