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Why is this program valid? I was trying to create a syntax error
... (Somehow I just managed to do such a bad commit.) So as a test program I randomly jotted this:
6 Answers
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What is the equivalent of “none” in django templates?
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None, False and True all are available within template tags and filters. None, False, the empty string ('', "", """""") and empty lists/tuples all evaluate to False when evaluated by if, so you can easily do
{% if profile.user.first_nam...
Mongoose.js: Find user by username LIKE value
...tion. Just ensure you are either try-catching or regexing your input prior and checking for [^a-zA-Z0-9] then not proceeding. In this case, its just test input so makes sense.
– Jason Sebring
Jan 13 '14 at 0:43
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Breaking a list into multiple columns in Latex
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Using the multicol package and embedding your list in a multicols environment does what you want:
\documentclass{article}
\usepackage{multicol}
\begin{document}
\begin{multicols}{2}
\begin{enumerate}
\item a
\item b
\item c
\item d
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Converting a Java collection into a Scala collection
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JavaConversions (robinst's answer) and JavaConverters (Ben James's answer) have been deprecated with Scala 2.10.
Instead of JavaConversions use:
import scala.collection.convert.wrapAll._
as suggested by aleksandr_hramcov.
Instead of JavaConverters use:
i...
How to get first character of string?
I have a string, and I need to get its first character.
16 Answers
16
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“aapt” IOException error=2, No such file or directory" why can't I build my gradle on jenkins?
...e following similar error on Ubuntu 13.10:
Cannot run program "/usr/local/android-sdk-linux/build-tools/19.0.3/aapt": error=2, No such file or directory
And this answer fixed it for me:
To get aapt working (this fixed my issues with the avd as well) just install these two packages:
sudo apt-g...
Define an 's src attribute in CSS [duplicate]
... can change the size of the image this way by using background-size:cover, and then changing the height and width.
– Lee
Oct 28 '15 at 15:15
1
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Ruby on Rails: How can I revert a migration with rake db:migrate?
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Run the following command
rake db:migrate:down VERSION=<version>
where <version> is the version number of your migration file you want to revert.
eg. if you want to revert a migration with file name 3846656238_create_users.rb
r...
How does Amazon RDS backup/snapshot actually work?
I am an Amazon RDS customer and am experiencing daily amazon RDS write latency spikes, corresponding roughly to the backup window. I will also see spikes at the end of a snapshot (case in point: running a snapshot takes appx 1 hour, and in the final 5 minutes, write latency spikes). I am running a m...