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Array Length in Java
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It contains the allocated size, 10. The unassigned indexes will contain the default value which is 0 for int.
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R memory management / cannot allocate vector of size n Mb
...at is not a cure in general -- I've switched, and now I have Error: cannot allocate vector of size ... Gb instead (but yeah, I have a lot of data).
– om-nom-nom
Apr 11 '12 at 17:20
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REST APIs: custom HTTP headers vs URL parameters
... part of a REST API?
Authentication: GUIDs, basic authentication, custom tokens, etc. e.g.,
Basic Authentication with a Guid token for REST api instead of username/password
If you get involved in passing tokens or other authentication-like information between domains covered by PCI-DSS or othe...
Quickly create a large file on a Linux system
... it is slow for this purpose. In Linux (and other POSIX systems), we have fallocate, which uses the desired space without having to actually writing to it, works with most modern disk based file systems, very fast:
For example:
fallocate -l 10G gentoo_root.img
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Batch equivalent of Bash backticks
...tionality using cmd.exe scripts with the for /f command:
for /f "usebackq tokens=*" %%a in (`echo Test`) do my_command %%a
Yeah, it's kinda non-obvious (to say the least), but it's what's there.
See for /? for the gory details.
Sidenote: I thought that to use "echo" inside the backticks in a "f...
Having a UITextField in a UITableViewCell
...ntifier:kCellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:kCellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryNone;
if ([indexPath section] == 0) {
...
RAII and smart pointers in C++
...ay to describe this limitation in Java or C# is because there is no way to allocate on the stack. C# allows stack allocation through a special keyword however, you lose type saftey.
– ApplePieIsGood
Dec 28 '08 at 14:25
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Can “using” with more than one resource cause a resource leak?
...What happens if font4 = new Font() throws after the unmanaged resource was allocated by the constructor but before the ctor returns and fills in font4 with the reference?
Let me make that a little bit more clear. Suppose we have:
public sealed class Foo : IDisposable
{
private int handle = 0;...
Why is whitespace sometimes needed around metacharacters?
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There is a list of characters that separate tokens in BASH. These characters are called metacharacters and they are |, &, ;, (, ), <, >, space and tab. On the other hand, curly braces ({ and }) are just ordinary characters that make up words.
Omitting the se...
Count the number of occurrences of a character in a string in Javascript
...bar".split("o").length-1
//>2
split not recommended. Resource hungry. Allocates new instances of 'Array' for each match. Don't try that for a >100MB file via FileReader. You can actually easily observe the EXACT resource usage using Chrome's profiler option.
3.
var stringsearch = "o"
,str...