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How to test an Internet connection with bash?
...
Without ping
#!/bin/bash
wget -q --spider http://google.com
if [ $? -eq 0 ]; then
echo "Online"
else
echo "Offline"
fi
-q : Silence mode
--spider : don't get, just check page availability
$? : shell return code
0 : shell "All OK" code
Without wget...
“used as value” in function call
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Get the device width in javascript
Is there a way to get the users device width, as opposed to viewport width, using javascript?
12 Answers
...
Linq: adding conditions to the where clause conditionally
...Where(predicate);
}
return source;
}
It helps to avoid chain breaks. Also the same ConditionalOrderBy and ConditionalOrderByDescending are helpful.
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improve this answer...
Remove CSS from a Div using JQuery
... a half dozen classes to deal with this, or I could use my base class and #id do some math, and clear the inline style that the animation applies.
$(actpar).animate({top:0, opacity:1, duration:500}, function() {
$(this).css({'top':'', 'opacity':''});
});
...
Convert a list to a data frame
... byrow=T))
The above will convert all character columns to factors, to avoid this you can add a parameter to the data.frame() call:
df <- data.frame(matrix(unlist(l), nrow=132, byrow=T),stringsAsFactors=FALSE)
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...
Can I avoid the native fullscreen video player with HTML5 on iPhone or android?
... JavaScript code that renders other content synchronized with the running video. It works great in desktop browsers: Firefox, Chrome, and Safari. On an iPhone or a DroidX, the native video player pops up and takes over the screen, thus obscuring the other dynamic content that I want to display simul...
Role-based access control (RBAC) vs. Claims-based access control (CBAC) in ASP.NET MVC
... people to create Customers.
you spotted another problem, anytime you decide that Marketing people should be allowed to create customers, you have to update all of your MVC Action methods Authorize attribute, compile your application, test and deploy. Some days later, you decided, not marketing bu...
Is there a way to auto expand objects in Chrome Dev Tools?
... "GlossList": {
"GlossEntry": {
"ID": "SGML",
"SortAs": "SGML",
"GlossTerm": "Standard Generalized Markup Language",
"Acronym": "SGML",
"Abbrev": "ISO 8879:1986",
...
Django Template Variables and Javascript
...isn't a "variable" or anything like it. It's just rendered text.
Having said that, you can put this kind of substitution into your JavaScript.
<script type="text/javascript">
var a = "{{someDjangoVariable}}";
</script>
This gives you "dynamic" javascript.
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