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Is there shorthand for returning a default value if None in Python? [duplicate]
... I can say x ?? "" , which will give me x if x is not null, and the empty string if x is null. I've found it useful for working with databases.
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Extract value of attribute node via XPath
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To get just the value (without attribute names), use string():
string(//Parent[@id='1']/Children/child/@name)
The fn:string() fucntion will return the value of its argument as xs:string. In case its argument is an attribute, it will therefore return the attribute's value as x...
Sanitizing strings to make them URL and filename safe?
...ying to come up with a function that does a good job of sanitizing certain strings so that they are safe to use in the URL (like a post slug) and also safe to use as file names. For example, when someone uploads a file I want to make sure that I remove all dangerous characters from the name.
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How to modify a global variable within a function in bash?
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Thanks for the point, but I have to return an string array, and within the function I have to add elements to two global string arrays.
– harrison4
May 9 '14 at 13:00
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What does the PHP error message “Notice: Use of undefined constant” mean?
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You should quote your array keys:
$department = mysql_real_escape_string($_POST['department']);
$name = mysql_real_escape_string($_POST['name']);
$email = mysql_real_escape_string($_POST['email']);
$message = mysql_real_escape_string($_POST['message']);
As is, it was looking for constants...
Objective-C and Swift URL encoding
I have a NSString like this:
12 Answers
12
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How to color System.out.println output? [duplicate]
...llowing will NOT color output in JavaScript in the Web Console
console.log(String.fromCharCode(27) + "[36mCYAN");
console.log("\x1b[30;47mBLACK_ON_WHITE");
Note that \x1b also works in node
In Shell Prompt OR Scripts
If you are working with bash or zsh, it is quite easy to color the output (i...
Command line progress bar in Java
...he thing to do is to print your progress bar, for example, by printing the string
"|======== |\r"
On the next tick of the progress bar, overwrite the same line with a longer bar. (because we are using \r, we stay on the same line) For example:
"|========= |\r"
What you have to re...
How can I debug a HTTP POST in Chrome?
...und. It'll give you the request & response headers of course, but with extra info like docs from MDN (the Mozilla Developer Network) for every standard header and status code you can see.
A picture is worth a thousand StackOverflow answers:
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Is using Random and OrderBy a good shuffle algorithm?
...Or you could replace the > 0 with >= 0 and not have to (although, an extra RNG hit plus a redundant assignment)
– FryGuy
Nov 29 '09 at 20:40
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