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How to extract the first two characters of a string in shell scripting?
...deed but here it is
sed 's/.//3g'
Or
awk NF=1 FPAT=..
Or
perl -pe '$_=unpack a2'
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Convert Iterable to Stream using Java 8 JDK
...mportant to most of daily iterable operations.
– user_3380739
Dec 7 '16 at 0:27
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show 2 more comments
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How to access command line arguments of the caller inside a function?
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My reading of the bash ref manual says this stuff is captured in BASH_ARGV,
although it talks about "the stack" a lot.
#!/bin/bash
function argv {
for a in ${BASH_ARGV[*]} ; do
echo -n "$a "
done
echo
}
function f {
echo f $1 $2 $3
echo -n f ; argv
}
function g {
...
javascript i++ vs ++i [duplicate]
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Nvm I was reading your code as separate statements 0_0
– Jesus Ramos
Jul 29 '11 at 2:16
2
Set android shape color programmatically
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Thanks .. saved my world.
– sid_09
May 4 '16 at 10:20
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How to run `rails generate scaffold` when the model already exists?
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TL;DR: rails g scaffold_controller <name>
Even though you already have a model, you can still generate the necessary controller and migration files by using the rails generate option. If you run rails generate -h you can see all of the optio...
How to wait 5 seconds with jQuery?
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Use a normal javascript timer:
$(function(){
function show_popup(){
$("#message").slideUp();
};
window.setTimeout( show_popup, 5000 ); // 5 seconds
});
This will wait 5 seconds after the DOM is ready. If you want to wait until the page is actually loaded you need to u...
How do I clear/delete the current line in terminal?
... Cut word before the cursor
Ctrl+y Paste the last deleted command
Ctrl+_ Undo
Ctrl+u Cut everything before the cursor
Ctrl+xx Toggle between first and current position
Ctrl+l Clear the terminal
Ctrl+c Cancel the command
Ctrl+r Search command in history - type the search term
Ctrl+j End...
WARNING: Can't verify CSRF token authenticity rails
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You should do this:
Make sure that you have <%= csrf_meta_tag %> in your layout
Add beforeSend to all the ajax request to set the header like below:
$.ajax({ url: 'YOUR URL HERE',
type: 'POST',
beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', $('meta[...
Array to String PHP?
... This is good unless you have nested arrays - which can happen with $_POST if you're using array-named form inputs.
– Leith
Oct 24 '16 at 4:47
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