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find() with nil when there are no records
... I found a weird issue with Rails 4.2 where when you pass a hash as 'x' to Something.find_by(id: x) it would create a SQL statement with all the attribute/value pairs of the hash as part of the WHERE clause. Looks like a Rails bug to me.
– Tilo
May 24 '...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
...hes PATH for bash, and bash is not always in /bin, particularly on non-Linux systems. For example, on my OpenBSD system, it's in /usr/local/bin, since it was installed as an optional package.
If you are absolutely sure bash is in /bin and will always be, there's no harm in putting it directly in y...
Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...stand the difference between Iterable and Traversable traits. Can someone explain ?
4 Answers
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do you have kcachegrind like profiling tools for mac [closed]
...
I ended up using qcachegrind on OSX. It can be installed via brew
brew install qcachegrind
or, to enable graphviz support:
brew install qcachegrind --with-graphviz
What's great about this program is that I successfully loaded a 6.1GB cachegrind file on ...
C# 4 default parameter values: How to assign a default DateTime/object value? [duplicate]
...it with attributes.
.method private hidebysig static void foo([opt] int32 x) cil managed
{
.param [1] = int32(5)
.maxstack 8
L_0000: nop
L_0001: ret
}
.method //this is a new method
private hidebysig static //it is private, ???, and static
void foo //it returns nothing (void) ...
How to remove a project (from the workspace) in PHPStorm?
...e manually. If you do so, you will see the folder disappear from Phpstorm explore window. This might be weird, but true.
B. Remove from the recent project panel of Phpstorm 2018.3
(The folder after such removal will hide and a creation of the same name of project will restore the removed from t...
Convert boolean to int in Java
...
In the case where myBoolean stands for a boolean expression, using parenthesis is more readable.
– rsp
Sep 25 '10 at 12:33
40
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Objective-C for Windows
...
Expanding on the two previous answers, if you just want Objective-C but not any of the Cocoa frameworks, then gcc will work on any platform. You can use it through Cygwin or get MinGW. However, if you want the Cocoa frameworks...
How to hide status bar in Android
I referred this link . In that if the user clicks on EditText(for ex To: ) at that time keyboard will be popped out and at the same time the user can be able to scroll to see all remaining views(ex: compose,subject, send button) in that screen. Similarly in my app I have one activity in that I am ...
What command means “do nothing” in a conditional in Bash?
... echo "2"
fi
From the bash manual:
: (a colon)
Do nothing beyond expanding arguments and performing redirections. The return status is zero.
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