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Extract a dplyr tbl column as a vector
...ge:base':
#>
#> intersect, setdiff, setequal, union
db <- src_sqlite(tempfile(), create = TRUE)
iris2 <- copy_to(db, iris)
vec <- pull(iris2, Species)
head(vec)
#> [1] "setosa" "setosa" "setosa" "setosa" "setosa" "setosa"
...
Android SDK on a 64-bit linux machine
...s. Your solution worked for my Linux Mint 13.
– pavel_kazlou
Sep 20 '12 at 20:55
Agree with commenter above, ubuntu 12...
rails + MySQL on OSX: Library not loaded: libmysqlclient.18.dylib
...
The solution is pretty easy; Add the library path in your ~/.bash_profile or ~/.profile file:
MYSQL=/usr/local/mysql/bin
export PATH=$PATH:$MYSQL
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH
If it is still not working (this work for me):
sudo ln -s /usr/local/mysql/...
Ruby - test for array
...
You probably want to use kind_of().
>> s = "something"
=> "something"
>> s.kind_of?(Array)
=> false
>> s = ["something", "else"]
=> ["something", "else"]
>> s.kind_of?(Array)
=> true
...
Can I obtain method parameter name using Java reflection?
...wever, you can't tell the name of the argument used." just read my answer -_-
– Johnco
Feb 10 '10 at 15:23
3
...
PHP PDO: charset, set names?
I had this previously in my normal mysql_* connection:
9 Answers
9
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How do I URL encode a string
...g this category to url-encode a string:
@implementation NSString (NSString_Extended)
- (NSString *)urlencode {
NSMutableString *output = [NSMutableString string];
const unsigned char *source = (const unsigned char *)[self UTF8String];
int sourceLen = strlen((const char *)source);
f...
JavaScript implementation of Gzip [closed]
... The code is covered under the LGPL.
// LZW-compress a string
function lzw_encode(s) {
var dict = {};
var data = (s + "").split("");
var out = [];
var currChar;
var phrase = data[0];
var code = 256;
for (var i=1; i<data.length; i++) {
currChar=data[i];
...
How to deep watch an array in angularjs?
... @Blazemonger comment (stackoverflow.com/questions/14712089#comment32440226_14713978).
– Sean the Bean
Jun 12 '15 at 19:23
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How to drop a database with Mongoose?
...the known schemas, and execute an ensureIndex to make sure we're clean
_.each(mongoose.connections[0].base.modelSchemas, function(schema, key) {
asyncFunctions.push(function(cb){
mongoose.model(key, schema).ensureIndexes(function(){
return cb()
})
})
})
...