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PHP function to generate v4 UUID
...
Taken from this comment on the PHP manual, you could use this:
function gen_uuid() {
return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
// 32 bits for "time_low"
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),...
Relative frequencies / proportions with dplyr
...2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vignette:
When you group by multiple variables, each summary peels off one level of the grouping. That makes it easy to progressively roll-up a dataset.
Thus, after the summarise, the last grouping variab...
How can I get a JavaScript stack trace when I throw an exception?
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Note that caller is now deprecated and callee is removed from ES5 strict mode. Here's why stackoverflow.com/questions/103598/…
– PhilT
Nov 5 '14 at 22:17
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How do you implement a good profanity filter?
... advanced generic class for word filtering that *'s out the center letters from censored words, and this previous Stack Overflow question that also has a PHP example (the main valuable part in there is the SQL-based filtered word approach -- the leet-speak compensator can be dispensed with if you fi...
A Java collection of value pairs? (tuples?)
...in the javafx.base module). EDIT: As of Java 11, JavaFX has been decoupled from the JDK, so you'd need the additional maven artifact org.openjfx:javafx-base.
Java 6+
In Java 6 and up, you can use the more verbose AbstractMap.SimpleImmutableEntry for an immutable pair, or AbstractMap.SimpleEntry ...
What's the difference between CENTER_INSIDE and FIT_CENTER scale types?
...urce and the destination container.
With the FIT_CENTER, that same image from the example above, would fit the entire container, because the sides are equal, and one axis is going to match the destination. With FIT_CENTER, if you had a box that was 5" x 10", and an image that was 5" x 7", the imag...
Practical non-image based CAPTCHA approaches?
... as they may sometimes be easy for you and incredibly difficult for people from different countries that haven't mastered English, or for people originating from different culture. They may got upset if you force them use dictionary only to log in! Or even worse, they just stop using the site.
...
How do I print a double value without scientific notation using Java?
... What is your opinion of new BigDecimal(myvalue).toPlainString() From the description at docs.oracle.com/javase/7/docs/api/java/math/…), it's not immediately obvious how it behaves when given different types of numbers, but it does eliminate scientific notation.
– D...
API Versioning for Rails Routes
...he routes file 301 has been made the default redirect and for good reason. From the guides: Please note that this redirection is a 301 “Moved Permanently” redirect. Keep in mind that some web browsers or proxy servers will cache this type of redirect, making the old page inaccessible.
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Detect when browser receives file download
...er;
var attempts = 30;
// Prevents double-submits by waiting for a cookie from the server.
function blockResubmit() {
var downloadToken = setFormToken();
setCursor( "wait", "wait" );
downloadTimer = window.setInterval( function() {
var token = getCookie( "downloadToken" );
...