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When to wrap quotes around a shell variable?
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What's the difference between IQueryable and IEnumerable
... code), which an IQueryProvider must explore/interpret/compile/whatever in order to generate results.
Having a query expression gives two advantages.
The first advantage is optimization. Because modifiers like 'Where' are included in the query expression, the IQueryProvider can apply otherwise imp...
JavaScript and Threads
...me parameters by the URL and the iframe can communicate with his parent in order to get the result and print it back (the iframe must be in the same domain).
This example doesn't work in all browsers! iframes usually run in the same thread/process as the main page (but Firefox and Chromium seem to ...
What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest?
...ntroller. I need to match request paths to different handlers (actions) in order to choose the correct one.
4 Answers
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Should I put #! (shebang) in Python scripts, and what form should it take?
... that will work, period. You don't need to worry about any of the guts in order to use it.
– SDsolar
Oct 17 '17 at 10:15
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How exactly does tail recursion work?
...ence?
Tail Call optimization
Since no state is being stored on the Non-Border-Cases of the Tail Call stacks, they aren't so important. Some languages/interpreters then substitute the old stack with the new one. So, with no stack frames constraining the number of calls, the Tail Calls behave just ...
How to wrap async function calls into a sync function in Node.js or Javascript?
...e I find the need to encapsulate an async function into a sync function in order to avoid massive global re-factoring.
You cannot. It is impossible to make asynchronous code synchronous. You will need to anticipate that in your global code, and write it in async style from the beginning. Whether y...
Wildcards in jQuery selectors
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Couldn't connect to server 127.0.0.1:27017
...cause the mongod process it's down, you must to run the commands bellow in order to get up the mongod process:
~$ sudo service mongodb stop
~$ sudo rm /var/lib/mongodb/mongod.lock
~$ sudo mongod --repair --dbpath /var/lib/mongodb
~$ sudo mongod --fork --logpath /var/lib/mongodb/mongodb.log --dbp...
Fast way of counting non-zero bits in positive integer
...thm of the argument (i.e. linearly with the bit-size of the argument).
In order to understand how this works imagine that you divide the entire 64-bit string into 64 1-bit buckets. Each bucket's value is equal to the number of bits set in the bucket (0 if no bits are set and 1 if one bit is set). T...