大约有 15,482 项符合查询结果（耗时：0.0239秒） [XML]
If vs. Switch Speed
...des as values.
This has asymptotic better runtime than lots of chained if tests and is actually faster even for relatively few strings.
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C++ templates that accept only certain types
...pe(std::declval<const T&>().end())>
static std::true_type test(int);
template<typename...>
static std::false_type test(...);
};
template<typename T>
struct has_begin_end : decltype(has_begin_end_impl::test<T>(0)) {};
template<typename T>
class obser...
Two-way encryption: I need to store passwords that can be retrieved
...se. Any idea why? $x = new Encryption(MCRYPT_BlOWFISH, MCRYPT_MODE_CBC); $test = $x->encrypt("test", "a"); echo var_dump($x->decrypt($test, "a"));
– The Wavelength
Dec 14 '12 at 21:52
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What is the advantage of GCC's __builtin_expect in if else statements?
... 7: R_X86_64_PC32 time-0x4
b: 48 85 c0 test %rax,%rax
e: 75 0a jne 1a <main+0x1a>
10: bf 00 00 00 00 mov $0x0,%edi
11: R_X86_64_32 .rodata.str1.1
15: e8 00 00 00 00 call...
The simplest way to comma-delimit a list?
...ry loop, but I bet it's more efficient than an if. Most solutions repeat a test we know won't be true - though inefficient, they're probably the clearest. Thanks for the link!
– 13ren
Mar 21 '09 at 12:03
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What does this symbol mean in IntelliJ? (red circle on bottom-left corner of file name, with 'J' in
...k on the blue sources folder icon (for adding sources) > Click on Green Test Sources folder ( to add Unit test folders).
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JSLint says “missing radix parameter”
...rmance differences between parseInt and Number. Here is an old performance test.
– Josh Unger
Jan 18 '19 at 0:19
4
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How can I list all collections in the MongoDB shell?
...ase to show all collection/tables inside it.
>show dbs
users 0.56787GB
test (empty)
>db.test.help() // this will give you all the function which can be used with this db
>use users
>show tables //will show all the collection in the db
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Understanding $.proxy() in jQuery
...a function foobar() we can change the this value by calling:
foobar.call({test: 5});
Now we could access in foobar the object we passed in:
function foobar() {
this.test // === 5
}
This is exactly what jQuery.proxy() does. It takes a function and context (which is nothing else than an obj...
preventDefault() on an tag
...
This is a non-JQuery solution I just tested and it works.
<html lang="en">
<head>
<script type="text/javascript">
addEventListener("load",function(){
var links= document.getElementsByTagName("a");
for (var i=0;i<links.length;i++){
...