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typedef struct vs struct definitions [duplicate]
...u have to declare struct variables like:
struct myStruct myVariable;
In order to be able to use myStruct myVariable; instead, you can typedef the struct:
typedef struct myStruct someStruct;
someStruct myVariable;
You can combine struct definition and typedefs it in a single statement which dec...
New Array from Index Range Swift
... ArraySlice).
Therefore, you can use subscript(_:) with init(_:) in order to get a new array from the first n elements of an array:
let array = Array(10...14) // [10, 11, 12, 13, 14]
let arraySlice = array[0..<3] // using Range
//let arraySlice = array[0...2] // using ClosedRange also wor...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
.../java_home -v '1.7*' to give you a suitable value to put into JAVA_HOME in order to make command line tools use Java 7.
export JAVA_HOME="`/usr/libexec/java_home -v '1.7*'`"
But standard double-clickable application bundles don't use JDKs installed under /Library/Java at all. Old-style .app bund...
How can I determine if a JavaScript variable is defined in a page? [duplicate]
...
To avoid accidental assignment, I make a habit of reversing the order of the conditional expression:
if ('undefined' !== typeof x) {
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Logical operators for boolean indexing in Pandas
... < 3 as df.A > (2 &
df.B) < 3, while the desired evaluation order is (df.A > 2) & (df.B <
3).
So, with this in mind, element wise logical AND can be implemented with the bitwise operator &:
df['A'] < 5
0 False
1 True
2 True
3 True
4 False
Name...
How do I upload a file with metadata using a REST web service?
... due to a weird business rule, we have to allow the upload to occur in any order (metadata first or file first). I was wondering if there was a way to combine the two in order to save the headache of dealing with both situations.
– Daniel T.
Oct 15 '10 at 19:56...
Typedef function pointer?
...
I guess I'm just confused about the ordering. With typedef int (*func)(int), I understand that func is an alias, just a little confused because the alias is tangled with the type. Going by typedef int INT as an example I would be more of ease if typedef functio...
How can I check for “undefined” in JavaScript? [duplicate]
... follow this rule, good for you: you aren't a hypocrite.
The thing is, in order to do lots of real work in JS, developers need to rely on redefinable identifiers to be what they are. I don't hear people telling me that I shouldn't use setTimeout because someone can
window.setTimeout = function () ...
std::string formatting like sprintf
...ed output and will not calculate the outputs length if that occurs.
So in order to get rid of the deprecation warnings during compilation, you can insert the following line at the top of the file which contains the use of _snprintf:
#pragma warning(disable : 4996)
Final thoughts
A lot of answ...
Should MySQL have its timezone set to UTC?
...id)
-- WHERE tzn.Name LIKE 'Europe/Moscow' -- Moscow has weird DST changes
ORDER BY tzt.Transition_time ASC
CONVERT_TZ also applies any necessary DST changes based on the rules in the above tables and the date that you use.
Note:
According to the docs, the value you set for time_zone does not cha...