大约有 37,000 项符合查询结果（耗时：0.0442秒） [XML]
What's the difference between eval, exec, and compile?
...gt; g = dict()
>>> l = dict()
>>> exec('global a; a, b = 123, 42', g, l)
>>> g['a']
123
>>> l
{'b': 42}
(If you display the value of the entire g, it would be much longer, because exec and eval add the built-ins module as __builtins__ to the globals automaticall...
Get first n characters of a string
How can I get the first n characters of a string in PHP? What's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
...
Google Maps V3 - How to calculate the zoom level for a given bounds
...LOBE_WIDTH = 256; // a constant in Google's map projection
var west = <?php echo $minLng; ?>;
var east = <?php echo $maxLng; ?>;
*var north = <?php echo $maxLat; ?>;*
*var south = <?php echo $minLat; ?>;*
var angle = east - west;
if (angle < 0) {
angle += 360;
}
*var a...
String concatenation: concat() vs “+” operator
...ing a = "abc";
public String b = "xyz";
public String c = "123";
}
@org.openjdk.jmh.annotations.State(Scope.Thread)
public static class State4 {
public String a = "abc";
public String b = "xyz";
public String c = "123";
public String d = ...
How do I get currency exchange rates via an API such as Google Finance? [closed]
... "USDIDR", "USDILS", "USDINR", "USDKRW", "USDMXN", "USDMYR", "USDNZD", "USDPHP", "USDSGD", "USDTHB", "USDZAR", "USDISK")&env=store://datatables.org/alltableswithkeys][1]
Here is the YQL query builder, where you can test a query and copy the url: (NO LONGER AVAILABLE)
http://developer.yahoo.com/y...
Renaming a virtualenv folder without breaking it
... using and so don't encounter the problem.
– CoderGuy123
Nov 4 '16 at 18:06
Scratch that! Today I ran into a problem: ...
MySQL offset infinite rows
...
use php 'PHP_INT_MAX' to avoid overflow effects.
– Karl Adler
Apr 7 '14 at 15:11
| ...
Does Javascript pass by reference? [duplicate]
...cript!
Call-by-Value
Primitive types are passed by-value:
var num = 123, str = "foo";
function f(num, str) {
num += 1;
str += "bar";
console.log("inside of f:", num, str);
}
f(num, str);
console.log("outside of f:", num, str);
Reassignments inside a function scope are ...
Create a folder if it doesn't already exist
...st( $wrapper, $target ) = explode( '://', $target, 2 );
}
// from php.net/mkdir user contributed notes
$target = str_replace( '//', '/', $target );
// put the wrapper back on the target
if( $wrapper !== null ) {
$target = $wrapper . '://' . $target;
}
// safe m...
ATL COM开发入门（二）（ActiveX/COM组件回调JS） - C/C++ - 清泛网 - 专注C/C++及内核技术
...建的ActiveX(COM组件)实现JS回调》。
源码点此下载，如有问题请点此。
ATL COM ActiveX 入门 JS回调