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C Macro definition to determine big endian or little endian machine?
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19 Answers
19
Active
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What's the $unwind operator in MongoDB?
... the following:
db.article.aggregate(
{ $project : {
author : 1 ,
title : 1 ,
tags : 1
}},
{ $unwind : "$tags" }
);
would return the following documents:
{
"result" : [
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
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Accessing dict keys like an attribute?
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313
The best way to do this is:
class AttrDict(dict):
def __init__(self, *args, **kwargs):
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Extract value of attribute node via XPath
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//Parent[@id='1']/Children/child/@name
Your original child[@name] means an element child which has an attribute name. You want child/@name.
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How to delete from select in MySQL?
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210
SELECT (sub)queries return result sets. So you need to use IN, not = in your WHERE clause.
Add...
Drawing a dot on HTML5 canvas [duplicate]
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143
For performance reasons, don't draw a circle if you can avoid it. Just draw a rectangle with a...
Only read selected columns
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157
Say the data are in file data.txt, you can use the colClasses argument of read.table() to skip...
Best way to parseDouble with comma as decimal separator?
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10 Answers
10
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How can I get file extensions with JavaScript?
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