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Grep characters before and after match?
...into a function in my ~/.bashrc file:
cgrep() {
# For files that are arrays 10's of thousands of characters print.
# Use cpgrep to print 30 characters before and after search patttern.
if [ $# -eq 2 ] ; then
# Format was 'cgrep "search string" /path/to/filename'
grep -o...
How do I programmatically set the value of a select box element using JavaScript?
...
This can also be used for multi-select; just pass an array of strings to the 'val' function instead of a single string. See: stackoverflow.com/a/16583001/88409
– Triynko
Dec 22 '15 at 21:38
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How do I get the path to the current script with Node.js?
...mple as:
process.argv[1]
From the Node.js documentation:
process.argv
An array containing the command line arguments. The first element will be 'node', the second element will be the path to the JavaScript file. The next elements will be any additional command line arguments.
If you need to know ...
onActivityResult is not being called in Fragment
...Also, I learned the hard way that you have to check if the fragment in the array is not a reference to itself! ` if(fragment!=this) { fragment.onActivityResult(requestCode, resultCode, data); `
– reubenjohn
Feb 11 '15 at 17:57
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Laravel Check If Related Model Exists
...lation since dynamic properties return Model or Collection. Both implement ArrayAccess.
So it goes like this:
single relations: hasOne / belongsTo / morphTo / morphOne
// no related model
$model->relation; // null
count($model->relation); // 0 evaluates to false
// there is one
$model->...
PHP: If internet explorer 6, 7, 8 , or 9
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PHP has a function called get_browser() that will return an object (or array if you so choose) with details about the users' browser and what it can do.
A simple look through gave me this code:
$browser = get_browser( null, true );
if( $browser['name'] == "Firefox" )
if( $browser['majorver...
AngularJS does not send hidden field value
...akes much trouble and assigns last value to all entityId if entityId is an array
– ImranNaqvi
Mar 2 '16 at 8:30
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How to inherit constructors?
...ong typing, default values, and other benefits not provided by a parameter array. It also makes it easy to carry forward since anything that inherits from Foo can still get to, or even add to, FooParams as needed. You still need to copy the constructor, but you always (most of the time) only (as a...
Get names of all files from a folder with Ruby
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In Ruby 2.5 you can now use Dir.children. It gets filenames as an array except for "." and ".."
Example:
Dir.children("testdir") #=> ["config.h", "main.rb"]
http://ruby-doc.org/core-2.5.0/Dir.html#method-c-children
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How to randomize (or permute) a dataframe rowwise and columnwise?
...irst argument. This means that the default size is the size of the passed array. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done without replacement which accomplishes a row wise shuffle.
Shuffle column-wise:
> df3 <- df1[,sample(ncol(df1))]
> ...