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Git merge left HEAD marks in my files

...ess of merging, but there were some parts that Git couldn't merge automatically. You'll need to hand-edit those parts to what you want them to be and then commit the results. For instance, in your particular case, you'd probably want to resolve it like this (note - the arrows/text on the right ar...
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?

... 'pancakes house?' } The JavaScript style (key: value) is only useful if all of your Hash keys are "simple" symbols (more or less something that matches /\A[a-z_]\w*\z/i, AFAIK the parser uses its label pattern for these keys). The :$in style symbols show up a fair bit when using MongoDB so you'l...
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Shuffling a list of objects

...erm = list(range(len(list_one))) random.shuffle(perm) list_one = [list_one[index] for index in perm] list_two = [list_two[index] for index in perm] Numpy / Scipy If your lists are numpy arrays, it is simpler: import numpy as np perm = np.random.permutation(len(list_one)) list_one = list_one[per...
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What is the difference between List (of T) and Collection(of T)?

...move items List - allows items to have an order (accessing and removing by index) Enumerable has no order. You cannot add or remove items from the set. You cannot even get a count of items in the set. It strictly lets you access each item in the set, one after the other. Collection is a modifiabl...
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What is the most efficient way to create a dictionary of two pandas Dataframe columns?

... In [9]: pd.Series(df.Letter.values,index=df.Position).to_dict() Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'} Speed comparion (using Wouter's method) In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB')) In [7]: %timeit dict(...
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TypeError: ObjectId('') is not JSON serializable

... from bson import json_util import json @app.route('/') def index(): for _ in "collection_name".find(): return json.dumps(i, indent=4, default=json_util.default) This is the sample example for converting BSON into JSON object. You can try this. ...
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Upload files with HTTPWebrequest (multipart/form-data)

... wresp.Close(); wresp = null; } } finally { wr = null; } } and sample usage: NameValueCollection nvc = new NameValueCollection(); nvc.Add("id", "TTR"); nvc.Add("btn-submit-photo", "Upload"); HttpUploadFile("http://your....
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Switch case with fallthrough?

I am looking for the correct syntax of the switch statement with fallthrough cases in Bash (ideally case-insensitive). In PHP I would program it like: ...
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Get top 1 row of each group

... @domanokz: no, it's not a subquery. If you have correct indexes then millions shouldn't be a problem. There are only 2 set based ways anyway: this and the aggregate (Ariel's solution). So try them both... – gbn Jul 27 '11 at 9:30 ...
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What's the difference between '$(this)' and 'this'?

...e, in .each, the callback function commonly used allows for .each(function(index,element){/*scope*/}). In that scope, this == element is true. jQuery callbacks use the apply function to bind the function being called with the current element. This element comes from the jQuery object's element arr...