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A numeric string as array key in PHP
Is it possible to use a numeric string like "123" as a key in a PHP array, without it being converted to an integer?
11 A...
Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception
...
I don't think so, necessarily. IDisposable technically is meant to be used for things that have non-managed resources, but then the using directive is just a neat way of implementing a common pattern of try .. finally { dispose }.
A purist would argue 'yes - it's...
Office在线预览及PDF在线预览的实现方式大集合 - 更多技术 - 清泛网 - 专注...
...的保护的源文件及文件的复制，不可复制也是缺点。
2、源码是自己的，版权有保证。
缺点：
1、服务器上必须安装Office软件。
2、导出PDF文件本身是个打印过程，Excel页面格式未设置，会出现一张表格打印出多页来，阅读体...
Hg: How to do a rebase like git's rebase
...e:
1. Start working on a new feature:
$ hg clone mainline-repo newfeature-123
do a few commits (M, N, O)
master A---B---C
\
newfeature-123 M---N---O
2. Pull new changes from upstream mainline:
$ hg pull
master A---B---C---D---E---F
\
newfeature-123 M---N---O
...
How can I print the contents of a hash in Perl?
...
Data::Dumper is your friend.
use Data::Dumper;
my %hash = ('abc' => 123, 'def' => [4,5,6]);
print Dumper(\%hash);
will output
$VAR1 = {
'def' => [
4,
5,
6
],
'abc' => 123
...
Why would I ever use push_back instead of emplace_back?
... will be invalid after the call.
std::vector<int> v;
v.emplace_back(123);
v.emplace_back(v[0]); // Produces incorrect results in some compilers
On one compiler, v contains the values 123 and 21 instead of the expected 123 and 123. This is due to the fact that the 2nd call to emplace_back re...
How to calculate “time ago” in Java?
...public static void main(String args[]) {
System.out.println(toDuration(123));
System.out.println(toDuration(1230));
System.out.println(toDuration(12300));
System.out.println(toDuration(123000));
System.out.println(toDuration(1230000));
System.out.println(toDuration(12300000))...
Parse query string into an array
...alone is note accurate, it could display for example:
$url = "somepage?id=123&lang=gr&size=300";
parse_str() would return:
Array (
[somepage?id] => 123
[lang] => gr
[size] => 300
)
It would be better to combine parse_str() with parse_url() like so:
$url = "som...
How to initialize a struct in accordance with C programming language standards
...tializer to initialize a structure:
MY_TYPE a = { .flag = true, .value = 123, .stuff = 0.456 };
Edit: Other members are initialized as zero: "Omitted field members are implicitly initialized the same as objects that have static storage duration." (https://gcc.gnu.org/onlinedocs/gcc/Designated-In...
What is the difference between parseInt() and Number()?
...
typeof parseInt("123") => number
typeof Number("123") => number
typeof new Number("123") => object (Number primitive wrapper object)
first two will give you better performance as it returns a primitive instead of an object.
...