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What are the complexity guarantees of the standard containers?
... O(n)
vector<T> v(begin, end); Make a vector and copy the elements from begin to end. O(n)
Accessors
v[i] Return (or set) the I'th element. O(1)
v.at(i) Return (or set) the I'th element, with bounds checking. O(1)
v.size() Return current numb...
WPF Blurry fonts issue- Solutions
...Technical background
There is a in-depth article about WPF Text rendering from one of the WPF Text Program Managers on windowsclient.net: Text Clarity in WPF.
The problem boils down to WPF needing a linearly scaling font-renderer for smooth animations. Pure ClearType on the other hand takes quite ...
static constructors in C++? I need to initialize private static objects
...ing to have to do all that. One of the many "mistakes" C# and java learned from.
– Gordon Gustafson
Jul 28 '09 at 22:59
110
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How to use the same C++ code for Android and iOS?
...eturns it. The idea is, iOS will send "Obj-C" and Android will send "Java" from their respective languages, and the CPP code will create a text as a follow "cpp says hello to << text received >>".
Shared CPP code
First of all, we are going to create the shared CPP code, doing it we hav...
Why does a function with no parameters (compared to the actual function definition) compile?
...rguments when using an ellipsis.
And again for the sake of completeness. From C11 specification 6:11:6 (page: 179)
The use of function declarators with empty parentheses (not
prototype-format parameter type declarators) is an obsolescent
feature.
...
Are list-comprehensions and functional functions faster than “for loops”?
...within a set of points, functional programming (using the starmap function from the built-in itertools module) turned out to be slightly slower than for-loops (taking 1.25 times as long, in fact). Here is the sample code I used:
import itertools, time, math, random
class Point:
def __init__(se...
ETag vs Header Expires
...ll always have to make a request. However, when the server reads the ETag from the client request, the server can then determine whether to send the file (HTTP 200) or tell the client to just use their local copy (HTTP 304). An ETag is basically just a checksum for a file that semantically changes...
Use of “global” keyword in Python
What I understand from reading the documentation is that Python has a separate namespace for functions, and if I want to use a global variable in that function, I need to use global .
...
How do I handle the window close event in Tkinter?
...Toplevel widget):
Here you have a concrete example:
import tkinter as tk
from tkinter import messagebox
root = tk.Tk()
def on_closing():
if messagebox.askokcancel("Quit", "Do you want to quit?"):
root.destroy()
root.protocol("WM_DELETE_WINDOW", on_closing)
root.mainloop()
...
Jenkins on OS X: xcodebuild gives Code Sign error
...
It's entirely different from the original question ... To start with, you should login as jenkins (e.g. via sudo -u jenkins bash) and check that you have the permissions on the whole path right. You did a lot of things you didn't say (like using dsc...