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Select first 4 rows of a data.frame in R
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Better way to sum a property value in an array
...y.prototype.sum = function (prop) {
var total = 0
for ( var i = 0, _len = this.length; i < _len; i++ ) {
total += this[i][prop]
}
return total
}
console.log(traveler.sum("Amount"))
The Fiddle: http://jsfiddle.net/9BAmj/
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Bomb dropping algorithm
...t dosent look that simple. It is true, that you can drop bomb at layer2 in order to clean, layer1, but if there are multiple solutions, they effect solutions for higher layers.
– Luka Rahne
Mar 10 '13 at 8:32
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Can I list-initialize a vector of move-only type?
...he following code through my GCC 4.7 snapshot, it tries to copy the unique_ptr s into the vector.
5 Answers
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Prevent form submission on Enter key press
...id="scriptBox" type="text" onkeypress="return runScript(event)" />
In order to run some "user defined" script from this text box when the enter key is pressed, and not have it submit the form, here is some sample code. Please note that this function doesn't do any error checking and most likely...
How to disable admin-style browsable interface of django-rest-framework?
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Embedded MongoDB when running integration tests
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public class EmbeddedMongoTest
{
private static final String DATABASE_NAME = "embedded";
private MongodExecutable mongodExe;
private MongodProcess mongod;
private MongoClient mongo;
@Before
public void beforeEach() throws Exception {
MongodStarter starter = Mongod...
Replace non-ASCII characters with a single space
...recommend the unidecode module:
from unidecode import unidecode
def remove_non_ascii(text):
return unidecode(unicode(text, encoding = "utf-8"))
Then you can use it in a string:
remove_non_ascii("Ceñía")
Cenia
shar...
How to get the latest tag name in current branch in Git?
...t least with my version of git (1.7.7.6) the tags are produced in the same order for both --sort=-authordate and --sort=authordate.
– larsks
Aug 1 '12 at 14:37
3
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How to retrieve the first word of the output of a command in bash?
... way is the use of bash arrays:
array=( $string ) # do not use quotes in order to allow word expansion
echo ${array[0]} # You can retrieve any word. Index runs from 0 to length-1
Also, you can directly read arrays in a pipe-line:
echo "word1 word2" | while read -a array; do echo "${array[0]}" ...