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Require either of two arguments using argparse
...wered Jun 22 '12 at 11:14
jlengrandjlengrand
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How to use WPF Background Worker
...gress (optional, but often useful)
a) subscribe to ProgressChanged event and use ReportProgress(Int32) in DoWork
b) set worker.WorkerReportsProgress = true; (credits to @zagy)
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What CSS selector can be used to select the first div within another div
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Agree that it's the ONLY correct answer to the question and it should be accepted.
– Ilya Streltsyn
Jul 17 '13 at 16:51
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How to make join queries using Sequelize on Node.js
I am using sequelize ORM; everything is great and clean, but I had a problem when I use it with join queries.
I have two models: users and posts.
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How does cookie “Secure” flag work?
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The client sets this only for encrypted connections and this is defined in RFC 6265:
The Secure attribute limits the scope of the cookie to "secure" channels (where "secure" is defined by the user agent). When a cookie has the Secure attribute, the user agent will includ...
error upon assigning Layout: BoxLayout can't be shared
...d to the ContentPane so it will look like it's 'shared' between the JFrame and the ContentPane
Do this instead:
JFrame frame = new JFrame();
frame.setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));
frame.add(new JLabel("Hello World!"));
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Selecting the first “n” items with jQuery
...ave a large result set to start with. Unfortunately, when evaluating ":lt" and other positional selectors, jQuery loops through the entire set, even if it's just getting the first element. I've written more about this on my blog here: spadgos.com/?p=51
– nickf
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Are std::vector elements guaranteed to be contiguous?
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This was missed from C++98 standard proper but later added as part of a TR. The forthcoming C++0x standard will of course contain this as a requirement.
From n2798 (draft of C++0x):
23.2.6 Class template vector [vector]
1 A vector is a sequence...
round() doesn't seem to be rounding properly
...documentation for the round() function states that you pass it a number, and the positions past the decimal to round. Thus it should do this:
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Simultaneously merge multiple data.frames in a list
... issue here is that each data.frame differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would...