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Inserting a Link to a Webpage in an IPython Notebook
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For visual learners.
[blue_text](url_here)
Thanks dbliss.
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How unique is UUID?
...it) as possible into random number APIs. See en.wikipedia.org/wiki/Entropy_%28computing%29
– broofa
Dec 6 '14 at 13:48
4
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How to create a temporary directory?
.../bin/bash
# the directory of the script
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
# the temp directory used, within $DIR
# omit the -p parameter to create a temporal directory in the default location
WORK_DIR=`mktemp -d -p "$DIR"`
# check if tmp dir was created
if [[ ! "...
Getting the count of unique values in a column in bash
...# remove case distinctions
# remove punctuation
gsub(/[^[:alnum:]_[:blank:]]/, "", $0)
for (i = 1; i <= NF; i++)
freq[$i]++
}
END {
for (word in freq)
printf "%s\t%d\n", word, freq[word]
}
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What is the difference between currying and partial application?
...lambda(accum,e){e+accum}))(0);
function length = curry(fold)(lambda(accum,_){1+accum})(empty-list);
function reverse = curry(fold)(lambda(accum,e){concat(e,accum)})(empty-list);
/* ... */
@list = [1, 2, 3, 4]
sum(list) //returns 10
@f = fold(lambda(accum,e){e+accum}) //f = lambda(accumulator,list)...
Why does Math.round(0.49999999999999994) return 1?
...ang/Math.html#round%28double%29
2. http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6430675 (credits to @SimonNickerson for finding this)
3. http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html#round%28double%29
4. http://grepcode.com/file/repository.grepcode.com/java/root/jdk/op...
Are email addresses case sensitive?
... is insightful application of Postel's law en.wikipedia.org/wiki/Robustness_principle. It remains wrong to write software that assumes local parts of email addresses are case-insensitive, but yes, given that there is plenty of wrong software out there, it is also less than robust to require case se...
Django: Why do some model fields clash with each other?
... a reverse relation from User back to GameClaim, which is usually gameclaim_set. However, because you have two FKs, you would have two gameclaim_set attributes, which is obviously impossible. So you need to tell Django what name to use for the reverse relation.
Use the related_name attribute in the...
How to stop a JavaScript for loop?
... is a good approach. Thanks @T.J. Crowder
– techloris_109
Sep 13 '17 at 7:35
@T.J. Crowder which statement is a good a...
Process all arguments except the first one (in a bash script)
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If you want a solution that also works in /bin/sh try
first_arg="$1"
shift
echo First argument: "$first_arg"
echo Remaining arguments: "$@"
shift [n] shifts the positional parameters n times. A shift sets the value of $1 to the value of $2, the value of $2 to the value of $3, and s...