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What Does 'Then' Really Mean in CasperJS
...wn below:
/**
* Schedules the next step in the navigation process.
*
* @param function step A function to be called as a step
* @return Casper
*/
Casper.prototype.then = function then(step) {
"use strict";
this.checkStarted();
if (!utils.isFunction(step)) {
throw new Casp...
What's wrong with using $_REQUEST[]?
... And anyway if the method is POST, you still might want to take some query parameters out of the URL.
No, the problem with $_REQUEST is nothing to do with conflating GET and POST parameters. It's that it also, by default, includes $_COOKIE. And cookies really aren't like form submission parameters...
Using Build Flavors - Structuring source folders and build.gradle correctly
...to multiple hosts depending on the flavor
As before, you must include some params on your product flavor config field.
android {
productFlavors {
devel {
applicationId "zuul.com.android.devel"
buildConfigField 'String', 'HOST', '"http://192.168.1.34:3000"'
...
Standard alternative to GCC's ##__VA_ARGS__ trick?
...ted extension that lets you use a name other than __VA_ARGS__ for the rest-parameter) in document N976, but that received no response whatsoever from the committee; I don't even know if anyone read it. In 2016 it was proposed again in N2023, and I encourage anyone who knows how that proposal is goi...
val-mutable versus var-immutable in Scala
...utable:
Mutable objects can be modified inside methods, that take them as parameters, while reassignment is not allowed.
import scala.collection.mutable.ArrayBuffer
object MyObject {
def main(args: Array[String]) {
val a = ArrayBuffer(1,2,3,4)
silly(a)
println(a) // ...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...ache.cache[i + (-IntegerCache.low)];
return new Integer(i);
}
If the param is an integer between IntegerCache.low (defaulted to -128) and IntegerCache.high (calculated at runtime with minimum value 127) then a pre-allocated (cached) object is returned. So when you use 127 as parameter, you're ...
When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
...o convert from type A to B, static_cast calls B's constructor passing A as param. Alternatively, A could have a conversion operator (i.e. A::operator B()). If B doesn't have such constructor, or A doesn't have a conversion operator, then you get compile time error.
Cast from A* to B* always succee...
JAX-RS — How to return JSON and HTTP status code together?
...ple:
@GET
@Path("retrieve/{uuid}")
public Response retrieveSomething(@PathParam("uuid") String uuid) {
if(uuid == null || uuid.trim().length() == 0) {
return Response.serverError().entity("UUID cannot be blank").build();
}
Entity entity = service.getById(uuid);
if(entity == ...
What is the formal difference in Scala between braces and parentheses, and when should they be used?
...ere curly braces and parenthesis can be used interchangeably: when passing parameters to method calls. You may replace parenthesis with curly braces if, and only if, the method expects a single parameter. For example:
List(1, 2, 3).reduceLeft{_ + _} // valid, single Function2[Int,Int] parameter
Lis...
Applying a function to every row of a table using dplyr?
...rows
How we add the output of the function is controlled by the .collate param. There's three options: list, rows, cols. When our output has length 1, it doesn't matter whether we use rows or cols.
iris %>%
by_row(.collate = "cols", ..f = function(this_row) {
this_row[1:4] %>% unlist...