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Is onload equal to readyState==4 in XMLHttpRequest?

I am confuse about the xhr return event, as I can tell, there are not so much different between onreadystatechange --> readyState == 4 and onload, is it true? ...
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How to enable NSZombie in Xcode?

I have an app that is crashing with no error tracing. I can see part of what is going on if I debug, but can't figure out which object is "zombie-ing". ...
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Why would json_encode return an empty string

I have a simple php structure with 3 nested arrays. 13 Answers 13 ...
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How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess

How to wait in a bash script for several subprocesses spawned from that script to finish and return exit code !=0 when any of the subprocesses ends with code !=0 ? ...
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What is the difference between 'content' and 'text'

I am using the terrific Python Requests library. I notice that the fine documentation has many examples of how to do something without explaining the why . For instance, both r.text and r.content are shown as examples of how to get the server response. But where is it explained what th...
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CodeIgniter activerecord, retrieve last insert id?

Are there any options to get the last insert id of a new record in CodeIgniter? 11 Answers ...
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Node / Express: EADDRINUSE, Address already in use - Kill server

I have a simple server running in node.js using connect: 40 Answers 40 ...
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Is it possible to use JavaScript to change the meta-tags of the page?

If I put a div in the head and display:none, than use JavaScript to display it, will this work? 17 Answers ...
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File Upload in WebView

I have been struggling to upload files from WebView since last few days and there is no progress. I googled and implemented all suggested solutions but none works, like: solutions suggested here , and so on. ...
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Update git commit author date when amending

I found myself amending my commits quite often. I don't stash so much because I tend to forget I did so, especially when I want to save what I did before I leave or before a weekend, so I do a "draft" commit. Only thing is, when I amend the commit, it is still set to the original author date. Is t...