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Why is using the rails default_scope often recommend against?
...to show unpublished (private) posts. So far so good.
2.1.1 :001 > Post.all
Post Load (0.2ms) SELECT "posts".* FROM "posts" WHERE "posts"."published" = 't'
Well this is pretty much what we expect. Now lets try:
2.1.1 :004 > Post.new
=> #<Post id: nil, title: nil, published: true...
How to convert a string to lower case in Bash?
...ous ways:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# t...
How would I extract a single file (or changes to a file) from a git stash?
...
This is pretty cool... I didn't really understand how stash worked until I read your answer (which lead me to the git-checkout addition). I really didn't get that, when you do a stash, git saves TWO commits -- one for the state of the index and one for the s...
Print all but the first three columns
...lt;=NF;i++)$(i-(n-1))=$i;NF=NF-(n-1);print $0}' n=4 | tr ' ' '-'
4-5-6-7
All other answers before Sep-2013 are nice but add extra spaces:
Example of answer adding extra leading spaces:
$ echo '1 2 3 4 5 6 7' |
awk '{$1=$2=$3=""}1' |
tr ' ' '-'
---4-5-6-7
Example of answer adding extra t...
Most efficient way to store thousand telephone numbers
... the end to minimize the required space.
We first sort the phone numbers (all reduced to 5 decimal digits). Then we count how many phone numbers there are for which the binary number consisting of the first m bits is all 0, for how many phone numbers the first m bits are at most 0...01, for how man...
Tri-state Check box in HTML?
...ment, I found a better solution:
HTML5 defines a property for checkboxes called indeterminate
See w3c reference guide. To make checkbox appear visually indeterminate set it to true:
element.indeterminate = true;
Here is Janus Troelsen's fiddle. Note, however, that:
The indeterminate state can...
How to add a local repo and treat it as a remote repo
...
Is the .git at the end specifically required though?
– Erik Aigner
Sep 23 '16 at 10:47
5
...
Check for array not empty: any?
..." value in the array evaluates to true.
Similar methods to this are none?, all? and one?, where they all just check to see how many times true could be evaluated. which has nothing to do with the count of values found in a array.
case 1
>> a = []
=> []
>> a.any?
=> false
>> a...
CSS selector for text input fields?
...r IE6 either use IE7.js (as Yi Jiang suggested) or start adding classes to all your text inputs.
Reference: http://www.w3.org/TR/CSS2/selector.html#attribute-selectors
Because it is specified that default attribute values may not always be selectable with attribute selectors, one could try to co...
How to loop through all the files in a directory in c # .net?
...=
Directory.GetFiles(txtPath.Text, "*ProfileHandler.cs", SearchOption.AllDirectories);
That last parameter effects exactly what you're referring to. Set it to AllDirectories for every file including in subfolders, and set it to TopDirectoryOnly if you only want to search in the directory give...