大约有 42,000 项符合查询结果(耗时:0.0837秒) [XML]

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How to log cron jobs?

I want to know how I can see exactly what the cron jobs are doing on each execution. Where are the log files located? Or can I send the output to my email? I have set the email address to send the log when the cron job runs but I haven't received anything yet. ...
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How do I check whether a jQuery element is in the DOM?

Let's say that I define an element 11 Answers 11 ...
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How can I use goto in Javascript?

I have some code that I absolutely must implement using goto . For example, I want to write a program like this: 16 Answer...
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How can I multiply and divide using only bit shifting and adding?

How can I multiply and divide using only bit shifting and adding? 14 Answers 14 ...
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Create code first, many to many, with additional fields in association table

I have this scenario: 6 Answers 6 ...
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JavaScript Regular Expression Email Validation [duplicate]

This code is always alerting out "null" , which means that the string does not match the expression. 17 Answers ...
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Why is 'this' a pointer and not a reference?

I was reading the answers to this question C++ pros and cons and got this doubt while reading the comments. 2 Answers ...
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Is returning null bad design? [closed]

I've heard some voices saying that checking for a returned null value from methods is bad design. I would like to hear some reasons for this. ...
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Check whether a string contains a substring

How can I check whether a given string contains a certain substring, using Perl? 3 Answers ...
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Does hosts file exist on the iPhone? How to change it? [closed]

I am developing an application that query to the server. In my Mac, I use the hosts file to change the dns to point to a local server within my local area network. ...