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what’s the difference between Expires and Cache-Control headers?
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Cache-Control was defined in HTTP/1.1, tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds: Cache-Control: max-age=3600.
The Expires header field gives the date/time after which the response is considered stale. The Expires value ...
How to detect internet speed in JavaScript?
...ctive bandwidth estimate in Mbits per sec. The browser makes this estimate from recently observed application layer throughput across recently active connections. Needless to say, the biggest advantage of this approach is that you need not download any content just for bandwidth/ speed calculation.
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Is “inline” without “static” or “extern” ever useful in C99?
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From the standard (ISO/IEC 9899:1999) itself:
Appendix J.2 Undefined Behaviour
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A function with external linkage is declared with an inline function specifier, but is not also defined in the same translation ...
Should I use past or present tense in git commit messages? [closed]
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The preference for present-tense, imperative-style commit messages comes from Git itself. From Documentation/SubmittingPatches in the Git repo:
Describe your changes in imperative mood, e.g. "make xyzzy do frotz"
instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy
to do fr...
CURL to access a page that requires a login from a different page
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My answer is a mod of some prior answers from @JoeMills and @user.
Get a cURL command to log into server:
Load login page for website and open Network pane of Developer Tools
In firefox, right click page, choose 'Inspect Element (Q)' and click on Network tab
Go...
Ignore Xcode warnings when using Cocoapods
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Add to your Podfile:
platform :ios
# ignore all warnings from all pods
inhibit_all_warnings!
# ignore warnings from a specific pod
pod 'FBSDKCoreKit', :inhibit_warnings => true
Then execute: pod install
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How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...ng gemsets:
$ rvm upgrade 1.9.2-p0 1.9.2
Are you sure you wish to upgrade from ruby-1.9.2-p0 to ruby-1.9.2-p136? (Y/n): Y
To replace with the latest stable release of 1.9.2. This avoids clutter.
Some additional helpful tips, thanks to comments (@Mauro, @James, @ACB)
$ rvm list known
# NOTE: yo...
returning in the middle of a using block
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@James Curran. From top to here, Only you explained what happed in the background. Many thanks.
– Sercan Timoçin
Sep 10 '19 at 15:18
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Random “Element is no longer attached to the DOM” StaleElementReferenceException
...tReferenceException e) {
System.out.println("Attempting to recover from StaleElementReferenceException ...");
return getStaleElemById(id);
}
}
Yes, it just keeps polling the element until it's no longer considered stale (fresh?). Doesn't really get to the root of the problem, b...
What is a database transaction?
...ible) explanation of a transaction as applied to computing (even if copied from Wikipedia)?
11 Answers
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