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Traits vs. interfaces
...later you decide you want to use a file-based cache system instead of APC. Now you have to change your controller code because you've programmed your controller to work with the functionality of the ApcCacher class rather than to an interface that expresses the capabilities of the ApcCacher class. L...
ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
...lier without success, but perhaps something else was wrong. Trying it just now again, then re-creating the situation with another user, I found that this did in fact do the trick. Of course, the formal answer today was "not to be stupid" and to use REVOKE and DROP USER to do it right. I'm indebted t...
getApplication() vs. getApplicationContext()
...text.getApplicationContext() when
first constructing the singleton.
I know this is not an exact and precise answer, but still, does that answer your question?
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Working with README.md on github.com [closed]
...up' in github but will in the previewer. It's useful, but just so people know.
– user2428107
Feb 27 '14 at 1:02
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Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
...he future requirements and they made EJB 1.0 and then 2.0 and then 3.0 and now 3.1 but EJB's target was for just some requirements (transaction, distributed component model, etc).
At the same time (in parallel) they realized that they need to support JSF too, then they made JSF managed beans and an...
Download File Using Javascript/jQuery
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2019 modern browsers update
This is the approach I'd now recommend with a few caveats:
A relatively modern browser is required
If the file is expected to be very large you should likely do something similar to the original approach (iframe and cookie) because some of the belo...
What specific productivity gains do Vim/Emacs provide over GUI text editors?
... I've been using Vim as my console-editor of choice for a couple months now (for editing configuration files while in my terminal), but I don't think I could stand it for my normal, every day work of writing web applications, which I do with a GUI text editor (which one isn't important).
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Convert dmesg timestamp to custom date format
...:
dmesg_with_human_timestamps () {
FORMAT="%a %b %d %H:%M:%S %Y"
now=$(date +%s)
cputime_line=$(grep -m1 "\.clock" /proc/sched_debug)
if [[ $cputime_line =~ [^0-9]*([0-9]*).* ]]; then
cputime=$((BASH_REMATCH[1] / 1000))
fi
dmesg | while IFS= read -r line; do
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Make virtualenv inherit specific packages from your global site-packages
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Do you know if there is any way of 'activating' the --system-site-packages option on a previously-created virtual environment? I would love to avoid the hassle of reinstalling all my local packages!
– Gabriel
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How do you run a command for each line of a file?
For example, right now I'm using the following to change a couple of files whose Unix paths I wrote to a file:
9 Answers
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