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how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
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I think this is very nice and short
<img src="imagenotfound.gif" alt="Image not found" onerror="this.src='imagefound.gif';" />
But, be careful. The user's browser will be stuck in an endless loop if the onerror image itself generates an error...
@synthesize vs @dynamic, what are the differences?
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@synthesize will generate getter and setter methods for your property.
@dynamic just tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else (like the superclass or will be provided at runtime).
Uses ...
Getting visitors country from their IP
...nfo("Visitor", "Country Code"); // IN
echo ip_info("Visitor", "State"); // Andhra Pradesh
echo ip_info("Visitor", "City"); // Proddatur
echo ip_info("Visitor", "Address"); // Proddatur, Andhra Pradesh, India
print_r(ip_info("Visitor", "Location")); // Array ( [city] => Proddatur [state] => An...
How does free know how much to free?
... array), but I do not have to pass the size to the free function. Why not, and can I use this same technique in my own functions to save me from needing to cart around the extra variable of the array's length?
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CustomErrors mode=“Off”
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This has been driving me insane for the past few days and couldn't get around it but have finally figured it out:
In my machine.config file I had an entry under <system.web>:
<deployment retail="true" />
This seems to override any other customError settings that ...
node.js database [closed]
...r of the mongodb driver for node.js. I'm using mongodb for my own projects and have been very happy with the performance of mongodb.
Mongodb driver for node.js
(Shameless plug) Feel free to ask any questions about the driver at
Google group for the mongodb driver
or here at Stackoverflow
Have f...
CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...p+0C]
769AEF65 mov eax, ebx
769AEF67 and eax, 0Eh ; 检查参数是否正确，目前第二个参数只用了一个字节
769AEF6A cmp eax, ebx
769AEF6C jnz loc_76A0B8C7
769AEF72 push edi
76...
Making git auto-commit
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On Linux you could use inotifywait to automatically execute a command every time a file's content is changed.
Edit: the following command commits file.txt as soon as it is saved:
inotifywait -q -m -e CLOSE_WRITE --format="git commit -m 'autocommit on change' %w" file.txt | sh
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How do I prevent commands from showing up in Bash history?
Sometimes, when I run commands like rm -rf XYZ , I don't want this to be recorded in Bash history, because I might accidentally run the same command again by reverse-i-search . Is there a good way to prevent this from happening?
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Is there a way to change the environment variables of another process in Unix?
... ("env_var_name=env_var_value")
(gdb) detach
This is quite a nasty hack and should only be done in the context of a debugging scenario, of course.
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