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Better way to sum a property value in an array

...n this.reduce((a, b) => a + (b[key] || 0), 0); } } const traveler = new TravellerCollection(...[ { description: 'Senior', Amount: 50}, { description: 'Senior', Amount: 50}, { description: 'Adult', Amount: 75}, { description: 'Child', Amount: 35}, { description: 'Infan...
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HtmlSpecialChars equivalent in Javascript?

... Yah, that page's code looks logical but I didn't test it out. The new link though works, I've verified it myself. I've already updated the post some time back. – o.k.w Nov 24 '09 at 2:19 ...
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How do you calculate log base 2 in Java for integers?

...nswer. – leeyuiwah Oct 22 '17 at 21:51 add a comment  |  ...
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How to fix “Attempted relative import in non-package” even with __init__.py

... 51 A gotcha: Note that there is no '.py' at the end! – mindthief Dec 7 '12 at 1:39 ...
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Why do I get “unresolved external symbol” errors when using templates? [duplicate]

... the header file of your template each time you need to use it for another new type. Lets admit that this is a hack due to the limitation of C++, one of the annoying design flaws like many others. – jbx Nov 1 '15 at 13:43 ...
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Creating Multifield Indexes in Mongoose / MongoDB

...unction () { StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f12573753%2fcreating-multifield-indexes-in-mongoose-mongodb%23new-answer', 'question_page'); } ); ...
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How do I measure the execution time of JavaScript code with callbacks?

...th adding a note that the executing time is then printed out, just so that new users now. – janko-m Nov 10 '15 at 13:13  |  show 2 more commen...
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Activate a virtualenv via fabric as deploy user

...lve my problem, instead of writing complex methods of fabric or installing new OS packages: /path/to/virtualenv/bin/python manage.py migrate/runserver/makemigrations # for running commands under virtualenv local("/home/user/env/bin/python manage.py migrate") # fabric command /path/to/virtual...
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What does a colon following a C++ constructor name do? [duplicate]

...elete it. Everyone should -1 it. Apparently, it's causing confusions for new comers (stackoverflow.com/questions/28529416/…). – thang Feb 15 '15 at 18:31 ...
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Node.js on multi-core machines

... [This post is up-to-date as of 2012-09-02 (newer than above).] Node.js absolutely does scale on multi-core machines. Yes, Node.js is one-thread-per-process. This is a very deliberate design decision and eliminates the need to deal with locking semantics. If you don'...