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How to write string literals in python without having to escape them?
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If you're dealing with very large strings, specifically multiline strings, be aware of the triple-quote syntax:
a = r"""This is a multiline string
with more than one line
in the source code."""
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ping response “Request timed out.” vs “Destination Host unreachable”
When I ping an IP address, what is the difference between Request timed out and Destination host unreachable returned from the command?
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Is there an ignore command for git like there is for svn?
... whatever subdirectory.
You can also edit .git/info/exclude to ignore specific files just in that one working copy. The .git/info/exclude file will not be committed, and will thus only apply locally in this one working copy.
You can also set up a global file with patterns to ignore with git config...
What to return if Spring MVC controller method doesn't return value?
...value = HttpStatus.OK)
public void updateDataThatDoesntRequireClientToBeNotified(...) {
...
}
Only get methods return a 200 status code implicity, all others you have do one of three things:
Return void and mark the method with @ResponseStatus(value = HttpStatus.OK)
Return An object and mar...
Resolve conflicts using remote changes when pulling from Git remote
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If you truly want to discard the commits you've made locally, i.e. never have them in the history again, you're not asking how to pull - pull means merge, and you don't need to merge. All you need do is this:
# fetch from th...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
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Following are the three commands which appears same but have minute differences
hadoop fs {args}
hadoop dfs {args}
hdfs dfs {args}
hadoop fs <args>
FS relates to a generic file system which can point to any file systems like local, HDFS etc. So this can be used when you are d...
Getting the ID of the element that fired an event
...Note also that this will also work, but that it is not a jQuery object, so if you wish to use a jQuery function on it then you must refer to it as $(this), e.g.:
$(document).ready(function() {
$("a").click(function(event) {
// this.append wouldn't work
$(this).append(" Clicked")...
PHP: How to send HTTP response code?
...quires special treatment for (Fast)CGI PHP:
$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) == 'cgi')
header("Status: 404 Not Found");
else
header("HTTP/1.1 404 Not Found");
Note: According to the HTTP RFC, the reason phrase can be any custom string (that conforms to the standa...
Is there a more elegant way of adding an item to a Dictionary safely?
... add key/object pairs to a dictionary, but I of course need to first check if the key already exists otherwise I get a " key already exists in dictionary " error. The code below solves this but is clunky.
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How to make button look like a link?
...a link using CSS. The changes are done but when I click on it, it shows as if it's pushed as in a button. Any idea how to remove that, so that the button works as a link even when clicked?
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