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How to make a HTTP request using Ruby on Rails?
...don't reinvent the wheel, and you benefit from the hard work others have already done. If a gem exists that makes your life easier, there's generally no good reason not to use it.
– Marnen Laibow-Koser
Apr 10 '18 at 22:27
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Why not use HTTPS for everything?
...swered May 1 '10 at 0:36
EadwacerEadwacer
1,10077 silver badges1010 bronze badges
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How many files can I put in a directory?
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I have had over 8 million files in a single ext3 directory. libc readdir() which is used by find, ls and most of the other methods discussed in this thread to list large directories.
The reason ls and find are slow in this case is that readdir() only reads 32K of directory entries at a t...
Is there a reason that Swift array assignment is inconsistent (neither a reference nor a deep copy)?
I'm reading the documentation and I am constantly shaking my head at some of the design decisions of the language. But the thing that really got me puzzled is how arrays are handled.
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What does the “yield” keyword do?
...you must understand iterables.
Iterables
When you create a list, you can read its items one by one. Reading its items one by one is called iteration:
>>> mylist = [1, 2, 3]
>>> for i in mylist:
... print(i)
1
2
3
mylist is an iterable. When you use a list comprehension, you...
“:” (colon) in C struct - what does it mean? [duplicate]
...ssigning to the structure looks like:"
struct file_operations fops = {
read: device_read,
write: device_write,
open: device_open,
release: device_release
};
The C99 (old, compatible) way looks like:
struct file_operations fops = {
.read = device_read,
.write = device_write,
...
How to check null objects in jQuery
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but.. wouldnt you get a "Cannot read property 'length' of null" error?
– Sagive SEO
Mar 25 '18 at 18:14
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Subset of rows containing NA (missing) values in a chosen column of a data frame
...onvert "NA" strings to NA values, and let "NULL" strings as is).
If using read.table() or read.csv(), you should consider the "na.strings" argument to do clean data import, and always work with real R NA values.
An example, working in both cases "NULL" and "NA" cells :
DF <- read.csv("file.csv...
Why use getters and setters/accessors?
...ink?) allows you to define properties as 1st class citizens where they can read / write a field directly initially but - should you need it - do so via getter / setter methods as well. Mucho convenient. Java, alas, does not - not to mention the javabeans standard which forces you to use getters / se...
how to listen to N channels? (dynamic select statement)
...h approaches presented so far given the same input, a slice of channels to read from and a function to call for each value which also need to know which channel the value came from.
There are three main differences between the approaches:
Complexity. Although it may partially be a reader preferen...