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Assign <em>mem>ultiple colu<em>mem>ns using := in data.table, by group
What is the best way to assign to <em>mem>ultiple colu<em>mem>ns using data.table ? For exa<em>mem>ple:
2 Answers
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Create Directory if it doesn't exist with Ruby
I a<em>mem> trying to create a directory with the following code:
4 Answers
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Difference between await and ContinueWith
Can so<em>mem>eone explain if await and ContinueWith are synony<em>mem>ous or not in the following exa<em>mem>ple. I'<em>mem> trying to use TPL for the first ti<em>mem>e and have been reading all the docu<em>mem>entation, but don't understand the difference.
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What does (angle brackets) <em>mem>ean in Java?
I a<em>mem> currently studying Java and have recently been stu<em>mem>ped by angle brackets(). What exactly do they <em>mem>ean?
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“icon-bar” in twitter bootstrap navigation bar
I cannot understand what the following code <em>mem>eans in ter<em>mem>s of icon-bar :
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C++ error: undefined reference to 'clock_getti<em>mem>e' and 'clock_setti<em>mem>e'
I a<em>mem> pretty new to Ubuntu, but I can't see<em>mem> to get this to work. It works fine on <em>mem>y school co<em>mem>puters and I don't know what I a<em>mem> not doing. I have checked usr/include and ti<em>mem>e.h is there just fine. Here is the code:
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Python, re<em>mem>ove all non-alphabet chars fro<em>mem> string
I a<em>mem> writing a python <em>Mem>apReduce word count progra<em>mem>. Proble<em>mem> is that there are <em>mem>any non-alphabet chars strewn about in the data, I have found this post Stripping everything but alphanu<em>mem>eric chars fro<em>mem> a string in Python which shows a nice solution using regex, but I a<em>mem> not sure how to i<em>mem>ple<em>mem>ent it
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How can I profile Python code line-by-line?
I've been using cProfile to profile <em>mem>y code, and it's been working great. I also use gprof2dot.py to visualize the results (<em>mem>akes it a little clearer).
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When to use , tag files, co<em>mem>posite co<em>mem>ponents and/or custo<em>mem> co<em>mem>ponents?
I started using JSF 2.0 with Facelets recently and got puzzled by new co<em>mem>posite co<em>mem>ponents knowing existing &a<em>mem>p;lt;ui:include&a<em>mem>p;gt; and other te<em>mem>plating techniques offered by Facelets 1.x.
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getSupportActionBar fro<em>mem> inside of Frag<em>mem>ent ActionBarCo<em>mem>pat
I'<em>mem> starting a new project that uses the AppCo<em>mem>pat/ActionBarCo<em>mem>pat in v7 support library. I'<em>mem> trying to figure out how to use the getSupportActionBar fro<em>mem> within a frag<em>mem>ent. <em>Mem>y activity that hosts the frag<em>mem>ent extends ActionBarActivity , but I don't see a si<em>mem>ilar support class for Frag<em>mem>ents.
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