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What's the best way to learn LISP? [closed]
I have been programming in Python, PHP, Java and C for a couple or years now, and I just finished reading Hackers and Painters, so I would love to give LISP a try!
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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...l know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondaries.
A note about "eventual consistency": unde...
CSS :after not adding content to certain elements
I'm having trouble understanding the behavior of the CSS :after property. According to the spec ( here and here ):
3 An...
Why is it necessary to set the prototype constructor?
....create(Person.prototype);
Now what happens when we create a new Student and copy it?
var student1 = new Student("trinth");
console.log(student1.copy() instanceof Student); // => false
The copy is not an instance of Student. This is because (without explicit checks), we'd have no wa...
REST API Best practice: How to accept list of parameter values as input [closed]
We are launching a new REST API and I wanted some community input on best practices around how we should have input parameters formatted:
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How to Store Historical Data
Some co-workers and I got into a debate on the best way to store historical data. Currently, for some systems, I use a separate table to store historical data, and I keep an original table for the current, active record. So, let's say I have table FOO. Under my system, all active records will go ...
How random is JavaScript's Math.random?
For 6 years I've had a random number generator page on my website. For a long time, it was the first or second result on Google for "random number generator" and has been used to decide dozens, if not hundreds of contests and drawings on discussion forums and blogs (I know because I see the referr...
What exactly is a reentrant function?
...rant?
No.
For example, let's have a C++ function that takes both a lock, and a callback as a parameter:
#include <mutex>
typedef void (*callback)();
std::mutex m;
void foo(callback f)
{
m.lock();
// use the resource protected by the mutex
if (f) {
f();
}
// u...
How to return a string value from a Bash function
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There is no better way I know of. Bash knows only status codes (integers) and strings written to the stdout.
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How does this checkbox recaptcha work and how can I use it?
...signed up to the oneplusone website https://account.oneplus.net/sign-up , and noticed this checkbox recaptcha
5 Answers
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