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How do I use CREATE OR REPLACE?
Am I correct in understanding that CREATE OR REPLACE basically means "if the object exists, drop it, then create it either way?"
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Rails find_or_create_by more than one attribute?
...ind_or_create_by_member_id_and_group_id(4, 7)
(use find_or_initialize_by if you don't want to save the record right away)
Edit: The above method is deprecated in Rails 4. The new way to do it will be:
GroupMember.where(:member_id => 4, :group_id => 7).first_or_create
and
GroupMember.whe...
Fullscreen Activity in Android?
How do I make an activity full screen? I mean without the notification bar. Any ideas?
32 Answers
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Show a number to two decimal places
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if you want to limit only float but not int then bcdiv($number,1,2)
– Wasim A.
Feb 26 '16 at 11:53
3
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Convert Elixir string to integer or float
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Note that this will return a tuple (if successful) and not the integer directly. If you want to do that, see @Szymon Jeż answer with String.to_integer/1
– user4275029
Sep 26 '16 at 12:27
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How do I remove objects from a JavaScript associative array?
...ie. an array with a missing index).
When working with instances of Array, if you do not want to create a sparsely populated array - and you usually don't - then you should use Array#splice or Array#pop.
Note that the delete operator in JavaScript does not directly free memory. Its purpose is to re...
extract part of a string using bash/cut/split
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I'm not sure if this is an argument for or against the creative use of grep, but try it with VAR=/here/is/a/path:with/a/colon/inside:DNS9=domain.com
– rici
Oct 20 '13 at 21:51
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Keep CMD open after BAT file executes
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Beware that if your program contains syntactical errors, the window will still close if you ran it via double-click and put cmd /k at the end.
– Tobias Feil
Jun 25 '19 at 6:47
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How do I install a custom font on an HTML site
...e it like the other standard fonts:
h3 { font-family: Delicious, sans-serif; }
So, in this case,
<html>
<head>
<style>
@font-face { font-family: JuneBug; src: url('JUNEBUG.TTF'); }
h1 {
font-family: JuneBug
}
</style>
</head&g...
How to add multi line comments in makefiles
...ng reasons, and adding a backslash on every line is not really practical. If you are using GNU make, I suggest you use the ifeq directive with a deliberately false expression. For example:
ifeq ("x","y")
# here's all your 'commented' makefile content...
endif
Hope that helps.
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