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Read a text file using Node.js?
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You'll want to use the process.argv array to access the command-line arguments to get the filename and the FileSystem module (fs) to read the file. For example:
// Make sure we got a filename on the command line.
if (process.argv.length < 3) {
console.lo...
CASCADE DELETE just once
...t-- if it does, it recursively calls itsself on the found data. It uses an array of data already marked for deletion to prevent infinite loops. Please test it out and let me know how it works for you. Note: It's a little slow.
I call it like so:
select delete_cascade('public','my_table','1');
creat...
Accessing dict keys like an attribute?
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You can have all legal string characters as part of the key if you use array notation.
For example, obj['!#$%^&*()_']
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Typescript: difference between String and string
...ng. In JavaScript, it is also considered better to use object literals and array literals too:
var arr = []; // not var arr = new Array();
var obj = {}; // not var obj = new Object();
If you really had a penchant for the string, you could use it in TypeScript in one of two ways...
var str: Strin...
How do I check if a type is a subtype OR the type of an object?
...her, but rather whether one type is assignment compatible with another. An array of uint isn't a subclass of an array of int, but they are assignment compatible. IEnumerable<Giraffe> isn't a subclass of IEnumerable<Animal>, but they are assignment compatible in v4.
–...
Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
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Yes, there is a difference. These are legal:
h = { :$in => array }
h = { :'a.b' => 'c' }
h[:s] = 42
but these are not:
h = { $in: array }
h = { 'a.b': 'c' } # but this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.ne...
Real World Example of the Strategy Pattern
...(an implementation of the strategy interface):
List<String> names = Arrays.asList("Anne", "Joe", "Harry");
Collections.sort(names, new Comparator<String>() {
public int compare(String o1, String o2) {
return o1.length() - o2.length();
}
});
Assert.assertEquals(Arrays.asList("Joe...
Getting multiple keys of specified value of a generic Dictionary?
... tried to add to the list it would throw an exception (you can't add to an array). And yes, BiLookup would probably be a better name.
– Jon Skeet
Aug 4 '09 at 15:09
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Unit testing code with a file system dependency
...ave_shouldBase64EncodeContents() {
OutputStream outputStream = new ByteArrayOutputStream();
StreamFactory streamFactory = mock(StreamFactory.class);
when(streamFactory.outStream()).thenReturn(outputStream);
// Run the method under test
Base64FileWriter fileWriter = new Base64Fil...
What exception classes are in the standard C++ library
... std::bad_alloc <new> failure to allocate storage
std::bad_array_new_length <new> invalid array length
std::bad_cast <typeinfo> execution of an invalid dynamic-cast
std::bad_exception <exception> signifies an incorrect exception was thrown
std::bad_funct...