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Is there still any reason to learn AWK?
...t can be tackled once one is using a concise scripting language that makes string manipulation easy — and awk was one of the first — it proceeds to teach the reader how to implement a database, a parser, an interpreter, and (if memory serves me) a compiler for a small project-specific computer l...
How to filter None's out of List[Option]?
...the same time, you can use flatten:
scala> someList.flatten
res0: List[String] = List(Hello, Goodbye)
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How can I trigger a JavaScript event click
...* @param {HTMLNode} node The node to fire the event handler on.
* @param {String} eventName The name of the event without the "on" (e.g., "focus")
*/
function fireEvent(node, eventName) {
// Make sure we use the ownerDocument from the provided node to avoid cross-window problems
var doc;
...
Python idiom to return first item or None
...aluates False, that value is discarded and replaced. If you have an empty string "" in the list, that is discarded and replaced by an empty list []. If you have a 0, also replaced by []. If you have False in there, also replaced. Etc. You might get away with this in a specific case, but this is...
Ruby Arrays: select(), collect(), and map()
...] != "" }
That will give you all items where the :qty key isn't an empty string.
official select documentation
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Can Powershell Run Commands in Parallel?
...($i=1; $i -le 3; $i++) {
$ScriptBlock = {
Param (
[string] [Parameter(Mandatory=$true)] $increment
)
Write-Host $increment
}
Start-Job $ScriptBlock -ArgumentList $i
}
Get-Job | Wait-Job | Receive-Job
...
Set value of hidden field in a form using jQuery's “.val()” doesn't work
..."hidden" id="thing" name="thing" value="yes" />
CHANGES!!
must be a "string thing"
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Get list of data-* attributes using javascript / jQuery
... will be automatically
pulled in to jQuery's data object.
Note that strings are left intact
while JavaScript values are converted
to their associated value (this
includes booleans, numbers, objects,
arrays, and null). The data-
attributes are pulled in the first
time the data prop...
How to allow only numeric (0-9) in HTML inputbox using jQuery?
... happen, don't do anything
return;
}
var charValue = String.fromCharCode(e.keyCode)
, valid = /^[0-9]+$/.test(charValue);
if (!valid) {
e.preventDefault();
}
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How should strace be used?
...ng the output to a file and then grepping that file for your path/file/env string may help you see what your program is actually attempting to do, as distinct from what you expected it to.
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