大约有 44,000 项符合查询结果（耗时：0.0662秒） [XML]
Simplest SOAP example
...';
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
alert(xmlhttp.responseText);
// alert('done. use firebug/console to see network response');
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Should I index a bit field in SQL Server?
... integer column, SQL's index contains a set of rows for each index value. If you have a range of 1 to 10, then you would have 10 index pointers. Depending on how many rows there are this can be paged differently. If your query looks for the index matching "1" and then where Name contains "Fred" (...
Why can't I push to this bare repository?
...e are no commits in "bare". This is a problem with the first commit only, if you create the repos in the order (bare,alice). Try doing:
git push --set-upstream origin master
This would only be required the first time. Afterwards it should work normally.
As Chris Johnsen pointed out, you would...
Determine if code is running as part of a unit test
...ve a unit test (nUnit). Many layers down the call stack a method will fail if it is running via a unit test.
19 Answers
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How to map atan2() to degrees 0-360
...rtable with this notation, and without the conversion to degrees built in: if(x>0) {radians = x;} else {radians = 2*PI + x;} so we are just adding 2PI to the result if it is less than 0.
– David Doria
Sep 25 '12 at 19:05
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Should a RESTful 'PUT' operation return something
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The HTTP specification (RFC 2616) has a number of recommendations that are applicable. Here is my interpretation:
HTTP status code 200 OK for a successful PUT of an update to an
existing resource. No response body needed. (Per Section 9...
Get value from JToken that may not exist (best practices)
...t the generic method Value() is for. You get exactly the behavior you want if you combine it with nullable value types and the ?? operator:
width = jToken.Value<double?>("width") ?? 100;
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Best way to detect that HTML5 is not supported
... was for detection when it's not supported, I recommend using it like so:
if (!isCanvasSupported()){ ...
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How can I get the line number which threw exception?
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If you need the line number for more than just the formatted stack trace you get from Exception.StackTrace, you can use the StackTrace class:
try
{
throw new Exception();
}
catch (Exception ex)
{
// Get stack trace ...
php is null or empty?
...
What you're looking for is:
if($variable === NULL) {...}
Note the ===.
When use ==, as you did, PHP treats NULL, false, 0, the empty string, and empty arrays as equal.
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