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Unique constraint that allows empty values in MySQL
...cts simply doesn't have a code. I can't invent codes because those are providers codes.
3 Answers
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jQuery show for 5 seconds then hide
I'm using .show to display a hidden message after a successful form submit.
3 Answers
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Perform .join on value in array of objects
... age: 24},
{name: "Peter", age: 21}
].map(e => e.name).join(",");
(fiddle)
If you want to support older browsers, that are not ES5 compliant you can shim it (there is a polyfill on the MDN page above). Another alternative would be to use underscorejs's pluck method:
var users = [
{nam...
How can I use 'Not Like' operator in MongoDB
...s regular expression capability to create regular expression
objects. Consider the following example which uses the pattern match
expression //:
db.inventory.find( { item: { $not: /^p.*/ } } )
EDIT (@idbentley):
{$regex: 'ttt'} is generally equivalent to /ttt/ in mongodb, so your query would becom...
How to jump to top of browser page
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I think scroll is widely supported. See stackoverflow.com/q/1925671/41906
– Clint Pachl
May 14 '15 at 8:26
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Django fix Admin plural
...seems like the Meta class approach still works.
So placing a meta class inside your model will still do the trick:
class Category(models.Model):
class Meta:
verbose_name_plural = "categories"
Note that we use the lower case here, as django is smart enough to capitalize it when we need...
Subscripts in plots in R
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Extract first item of each sublist
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You said that you have an existing list. So I'll go with that.
>>> lst1 = [['a','b','c'], [1,2,3], ['x','y','z']]
>>> lst2 = [1, 2, 3]
Right now you are appending the generator object to your second list.
>...
Difference between CLOB and BLOB from DB2 and Oracle Perspective?
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They can be considered as equivalent. The limits in size are the same:
Maximum length of CLOB (in bytes or OCTETS)) 2 147 483 647
Maximum length of BLOB (in bytes) 2 147 483 647
There is also the DBCLOBs, for double byte character...
How to change the default font size in ggplot2
...ggplot2 graphics, like font size for instance, for a whole R session. The idea is to avoid setting them for each plot.
2 ...