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Why do I get a “Null value was assigned to a property of primitive type setter of” error message whe
...he primitive type from the getter. Ex:
private Integer num;
public void setNum(Integer i) {
this.num = i;
}
public int getNum() {
return this.num;
}
But in most cases you will want to return the wrapper class.
So either set your DB column to not allow nulls, or use a wrapper ...
how to access iFrame parent page using jquery?
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For those who launched a windoid with window.open, don't forget about that old JS standard window.opener.document. $("#someDiv", window.opener.document) works.
– jjohn
May 21 '13 at 18:03
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Android - implementing startForeground for a service?
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@Snicolas: Thank you for pointing out a flaw in Android. I will work on getting this fixed.
– CommonsWare
Oct 12 '12 at 15:19
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Hide all but $(this) via :not in jQuery selector
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$(this).siblings().hide();
Traversing/Siblings
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Create table using Javascript
...me('body')[0];
var tbl = document.createElement('table');
tbl.style.width = '100%';
tbl.setAttribute('border', '1');
var tbdy = document.createElement('tbody');
for (var i = 0; i < 3; i++) {
var tr = document.createElement('tr');
for (var j = 0; j < 2; j++) {
if...
Convert Django Model object to dict with all of the fields intact
... one convert a Django Model object to a dict with all of its fields? All ideally includes foreign keys and fields with editable=False .
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How to select a drop-down menu value with Selenium using Python?
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What do I do if I am using find_by_id? How do I supply the value then? Also, how do I find the xpath of an element?
– Prakhar Mohan Srivastava
Feb 23 '15 at 13:57
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Git-Based Source Control in the Enterprise: Suggested Tools and Practices?
... an enterprise I think it's important to choose a tool that introduces the least friction. For the transition to be successful it's especially important to consider the varying skill between developers (in regards to VCS).
Reducing friction:
Ok, since you appear to be really stuck with the situa...
Numbering rows within groups in a data frame
...l, df$cat, FUN = seq_along)
or:
library(plyr)
ddply(df, .(cat), mutate, id = seq_along(val))
or:
library(dplyr)
df %>% group_by(cat) %>% mutate(id = row_number())
or (the most memory efficient, as it assigns by reference within DT):
library(data.table)
DT <- data.table(df)
DT[, id...
How to read XML using XPath in Java
...xml version="1.0" encoding="UTF-8"?>
<Employees>
<Employee id="1">
<age>29</age>
<name>Pankaj</name>
<gender>Male</gender>
<role>Java Developer</role>
</Employee>
<Employee id="2">
...