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How to use Active Support core extensions
...oose to load bigger chunks. If you want everything in one big gulp use...
For 1.9.2:
rvm 1.9.2
irb -f
irb(main):001:0> require 'active_support/all'
=> true
irb(main):002:0> 1.week.ago
=> 2010-11-14 17:56:16 -0700
irb(main):003:0>
For 1.8.7:
rvm 1.8.7
irb -f
irb(main):001:0> r...
What makes JNI calls slow?
...y "slow," we're talking about something that can take tens of nanoseconds. For trivial native methods, in 2010 I measured calls at an average 40 ns on my Windows desktop, and 11 ns on my Mac desktop. Unless you're making many calls, you're not going to notice.
That said, calling a native method can...
Where is the syntax for TypeScript comments documented?
Is the syntax for TypeScript comments documented anywhere?
5 Answers
5
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How to show and update echo on same line
...
Well I did not read correctly the man echo page for this.
echo had 2 options that could do this if I added a 3rd escape character.
The 2 options are -n and -e.
-n will not output the trailing newline. So that saves me from going to a new line each time I echo something....
How does lombok work?
...ty of VMs out there, if they ship a compiler at all, are one of those two. For example, the Apple VM ships with stock sun javac, and as such lombok works just fine on macs. Same goes for the soylatte VM, for example.
While for javac we really do have to stick with their updates, partly because of a...
How to drop into REPL (Read, Eval, Print, Loop) from Python code
Is there a way to programmatically force a Python script to drop into a REPL at an arbitrary point in its execution, even if the script was launched from the command line?
...
Iterating over each line of ls -l output
...
Set IFS to newline, like this:
IFS='
'
for x in `ls -l $1`; do echo $x; done
Put a sub-shell around it if you don't want to set IFS permanently:
(IFS='
'
for x in `ls -l $1`; do echo $x; done)
Or use while | read instead:
ls -l $1 | while read x; do echo $x;...
iOS: How does one animate to new autolayout constraint (height)
I've never worked with autolayout constraints before. I have a small new app I'm working on and noticed that the NIB's views are defaulting to autolayout. So, I figured I'd take the opportunity to work with it and try to figure out where Apple is going with this.
...
How do I modify a MySQL column to allow NULL?
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This did not work for me! The column did not change. Maybe because I had a constraint to another table where the column was used (when not null).
– Rocologo
Dec 18 '16 at 10:09
...
Convert Python dictionary to JSON array
... @J.F.Sebastian: Indeed, very inefficient as compared to b64encode. For example, for the 256 character string s = ''.join(chr(i) for i in xrange(256)), len(json.dumps(b64encode(s))) == 346 vs len(json.dumps(s.decode('latin1'))) == 1045.
– martineau
Feb 2...