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Compare JavaScript Array of Objects to Get Min / Max
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The only thing I would change is setting lowest and highest is a bit redundant. I would rather loop one less time and set lowest=highest=myArray[0] and then start the loop at 1.
– J. Holmes
Jan 14 '12 at 19:13
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How to undo 'git reset'?
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Short answer:
git reset 'HEAD@{1}'
Long answer:
Git keeps a log of all ref updates (e.g., checkout, reset, commit, merge). You can view it by typing:
git reflog
Somewhere in this list is the commit that you lost. Let's say you just typed g...
How to remove an element from an array in Swift
How can I unset/remove an element from an array in Apple's new language Swift?
18 Answers
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Git diff --name-only and copy that list
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@HalvorStrand, I haven't tested it, but setting IFS=$'\n' first may do it. (Preferably in a subshell so as not to mess up your original IFS value.)
– Wildcard
Nov 15 '17 at 7:57
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What does void mean in C, C++, and C#?
...ad of time.
For example, in the Linux Kernel when deferring work you will setup a function to be run at a latter time by giving it a pointer to the function to be run and a pointer to the data to be passed to the function:
struct _deferred_work {
sruct list_head mylist;
.worker_func = bar;
.data ...
PHP page redirect [duplicate]
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You should also set the HTTP Status to 302.
– Allain Lalonde
Jan 21 '10 at 20:58
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Converting between java.time.LocalDateTime and java.util.Date
Java 8 has a completely new API for date and time. One of the most useful classes in this API is LocalDateTime , for holding a timezone-independent date-with-time value.
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What is the correct answer for cout
... editor after snippets, if snippets enabled
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How to read integer value from the standard input in Java
What class can I use for reading an integer variable in Java?
7 Answers
7
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Validate uniqueness of multiple columns
...kind of behaviour, one should add a unique constraint to db table. You can set it with add_index helper for one (or multiple) field(s) by running the following migration:
class AddUniqueConstraints < ActiveRecord::Migration
def change
add_index :table_name, [:field1, ... , :fieldn], unique:...