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How do I filter query objects by date range in Django?
... edited May 23 '17 at 12:18
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answered Jan 12 '11 at 12:21
crodjercrodjer
...
Length of a JavaScript object
...a plugin is equally accessible:
$.assocArraySize = function(obj) {
// http://stackoverflow.com/a/6700/11236
var size = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)) size++;
}
return size;
};
...
R: rJava package install failing
...low.
export JAVA_LIBS="$JAVA_LIBS -ldl"
R CMD javareconf
See details at
http://www-01.ibm.com/support/knowledgecenter/SSPT3X_3.0.0/com.ibm.swg.im.infosphere.biginsights.install.doc/doc/install_install_r.html
share
...
Converting a Java Keystore into PEM Format
... -keystore foo.jks -genkeypair -alias foo \
-dname 'CN=foo.example.com,L=Melbourne,ST=Victoria,C=AU'
Enter keystore password:
Re-enter new password:
Enter key password for
(RETURN if same as keystore password):
bash$ keytool -keystore foo.jks -exportcert -alias foo | \
o...
What is RSS and VSZ in Linux memory management
... way more to it than this, to learn more check the following references:
http://manpages.ubuntu.com/manpages/en/man1/ps.1.html
https://web.archive.org/web/20120520221529/http://emilics.com/blog/article/mconsumption.html
Also see:
A way to determine a process's "real" memory usage, i.e. private...
Python __call__ special method practical example
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How do I get the path to the current script with Node.js?
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@VeaceslavCotruta comment is definitely the best solution to this.
– cchamberlain
May 14 '16 at 3:31
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How do I add a placeholder on a CharField in Django?
...ore writing, yes, but the separation allows for better abstraction of more complicated cases.
You can also declare a widgets attribute containing a <field name> => <widget instance> mapping directly on the Meta of your ModelForm sub-class.
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Filter rows which contain a certain string
...verse)
# The data. Data expo 09. ASA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html
df <- read_csv("Downloads/2008.csv")
print(dim(df))
# [1] 7009728 29
benchmark(
"str_detect" = {df %>% filter(str_detect(Dest, 'MCO|BWI'))},
"grepl" = {df ...
Only read selected columns
...ample csv file
Download and save the the CSV JDBC driver from this link: http://sourceforge.net/projects/csvjdbc/files/latest/download
> library(RJDBC)
> path.to.jdbc.driver <- "jdbc//csvjdbc-1.0-18.jar"
> drv <- JDBC("org.relique.jdbc.csv.CsvDriver", path.to.jdbc.driver)
> con...