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How to make an empty div take space
...  to the empty items.
I don't understand why you're not using a <table> here, though? They will do this kind of stuff automatically.
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PHP - Modify current object in foreach loop
...ommended, the way the foreach passes around the value part of the loop results in unpredicatble behaviour. It may be longer but you're far safer using method 1 here.
– Paystey
Apr 12 '12 at 10:11
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Removing a model in rails (reverse of “rails g model Title…”)
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bundle exec rake db:rollback
rails destroy model <model_name>
When you generate a model, it creates a database migration. If you run 'destroy' on that model, it will delete the migration file, but not the database table. So before run
bundle exec rake db:rollback
...
What's the correct way to convert bytes to a hex string in Python 3?
...ode('hex')
In Python 3, str.encode / bytes.decode are strictly for bytes<->str conversions. Instead, you can do this, which works across Python 2 and Python 3 (s/encode/decode/g for the inverse):
import codecs
codecs.getencoder('hex')(b'foo')[0]
Starting with Python 3.4, there is a less a...
Determine if a String is an Integer in Java [duplicate]
...ng s, int radix) {
if(s.isEmpty()) return false;
for(int i = 0; i < s.length(); i++) {
if(i == 0 && s.charAt(i) == '-') {
if(s.length() == 1) return false;
else continue;
}
if(Character.digit(s.charAt(i),radix) < 0) return false;
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Bring a window to the front in WPF
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A bit odd, since by default ShowActivated is on.
– greenoldman
May 26 '11 at 19:30
1
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DateTime.Now vs. DateTime.UtcNow
...ts Ticks to a GMT based value. It also sets Kind to Utc.
DateTime.Now alters the Ticks value to what it would be if it was your time of day in the GMT time zone. It also sets Kind to Local.
If you're 6 hours behind (GMT-6), you'll get the GMT time from 6 hours ago. .Net actually ignores Kind ...
Why is “origin/HEAD” shown when running “git branch -r”?
...st is correct.
In git, you can select which branch is checked out by default (i.e. when you clone). By default, origin/HEAD will point at that.
On GitHub, You can change this in the Admin settings for your GitHub repo. You can also do it from the command-line via
git remote set-head origin trunk
...
const vs constexpr on variables
...mpile-time than at runtime. So 1 / PI1 and 1 / PI2 may yield different results. I don't think this technicality is quite as important as the advice in this answer however.
– Luc Danton
Nov 12 '12 at 19:07
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Print current call stack from a method in Python code
... print(line.strip())
f()
# Prints:
# File "so-stack.py", line 10, in <module>
# f()
# File "so-stack.py", line 4, in f
# g()
# File "so-stack.py", line 7, in g
# for line in traceback.format_stack():
If you really only want to print the stack to stderr, you can use:
traceba...