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How does PHP 'foreach' actually work?
...hat, in all cases but 3, the array is modified during the loop, while this extra reference is alive. This triggers a clone, and that explains what's going on here!
Here is an excellent article for another side effect of this copy-on-write behaviour: The PHP Ternary Operator: Fast or not?
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seek() function?
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For strings, forget about using WHENCE: use f.seek(0) to position at beginning of file and f.seek(len(f)+1) to position at the end of file. Use open(file, "r+") to read/write anywhere in a file. If you use "a+" you'll only be ab...
Python how to write to a binary file?
...eorder='big'))
I.e., each single call to to_bytes in this case creates a string of length 1, with its characters arranged in big-endian order (which is trivial for length-1 strings), which represents the integer value byte. You can also shorten the last two lines into a single one:
newFile.write(...
'size_t' vs 'container::size_type'
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For std::[w]string, std::[w]string::size_type is equal to std::allocator<T>::size_type, which is equal to the std::size_t. For other containers, it's some implementation defined unsigned integer type.
Sometimes it's useful to hav...
Explanation of strong and weak storage in iOS5
... Another good one is Helium balloons: as long as at least one string is held, it's not going to float away. The leash/balloon analogies are also good at getting people to forget that "ownership" is managed by retain/release.
– Steve Weller
Feb 13 '...
How to pass parameters using ui-sref in ui-router to controller
...ue, the param value will be treated as an array of values.
squash - {bool|string=}: squash configures how a default parameter value is represented in the URL when the current parameter value is the same as the default value.
We can call these params this way:
// hidden param cannot be passed via...
How do you do a case insensitive search using a pattern modifier using less?
...ummon this feature on a per search basis like so:
less prompt> /search string/-i
This option is in less's interactive help which you access via h:
less prompt> h
...
-i ........ --ignore-case
Ignore case in searches that do not contain uppercase.
-I ........ --IGN...
Is it possible to assign numeric value to an enum in Java?
... return otherMass * surfaceGravity();
}
public static void main(String[] args) {
if (args.length != 1) {
System.err.println("Usage: java Planet <earth_weight>");
System.exit(-1);
}
double earthWeight = Double.parseDouble(args[0]);
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Naming convention for Scala constants?
...al lowerConst = "lower"
val UpperConst = "UPPER"
def main(args: Array[String]) {
for (i <- Seq(lowerConst, UpperConst, "should mismatch.").map(Option.apply)) {
print("Input '%s' results in: ".format(i))
i match {
case Some(UpperConst) => println("UPPER!!!")
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instantiate a class from a variable in PHP?
... If you work with namespace, put the current namespace into the string: $var = __NAMESPACE__ . '\\' . $var . 'Class';
– bastey
Sep 2 '13 at 13:28
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