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Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
...that would betray the values written in object literals:
Object.prototype.__defineSetter__('x', function(x) {
alert('Ha! I steal '+x);
});
Then when a <script> was pointed at some JSON that used that property name:
{"x": "hello"}
the value "hello" would be leaked.
The way that arra...
javac is not recognized as an internal or external command, operable program or batch file [closed]
...amine PATH. Remove old Java paths.
Add the new Java path to PATH.
Edit JAVA_HOME.
Close and re-open console/IDE.
Welcome!
You have encountered one of the most notorious technical issues facing Java beginners: the 'xyz' is not recognized as an internal or external command... error message.
In a...
How to have the cp command create any necessary folders for copying a file to a destination [duplica
...ould be to combine mkdir and cp:
mkdir -p /foo/bar && cp myfile "$_"
As an aside, when you only need to create a single directory in an existing hierarchy, rsync can do it in one operation. I'm quite a fan of rsync as a much more versatile cp replacement, in fact:
rsync -a myfile /foo/b...
How do I convert a Ruby class name to a underscore-delimited symbol?
...ow can I programmatically turn a class name, FooBar , into a symbol, :foo_bar ? e.g. something like this, but that handles camel case properly?
...
Count how many records are in a CSV Python?
...
You need to count the number of rows:
row_count = sum(1 for row in fileObject) # fileObject is your csv.reader
Using sum() with a generator expression makes for an efficient counter, avoiding storing the whole file in memory.
If you already read 2 rows to start ...
Will strlen be calculated multiple times if used in a loop condition?
...mstances include compiling with GCC under linux, where strlen is marked as __attribute__((pure)) allowing the compiler to elide multiple calls. GCC Attributes
– David Rodríguez - dribeas
Jul 6 '12 at 15:42
...
In CMake, how can I test if the compiler is Clang?
...
A reliable check is to use the CMAKE_<LANG>_COMPILER_ID variables. E.g., to check the C++ compiler:
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
# using Clang
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
# using GCC
elseif (CMAKE_CXX_COMPILER_ID STREQ...
How to force NSLocalizedString to use a specific language
...;
@end
Implementation
#import <objc/runtime.h>
static const char _bundle=0;
@interface BundleEx : NSBundle
@end
@implementation BundleEx
-(NSString*)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName
{
NSBundle* bundle=objc_getAssociatedObject(s...
Converting datetime.date to UTC timestamp in Python
...ase on the given platform. You could use pytz module (e.g., via tzlocal.get_localzone()) to get access to the tz database on all platforms. Also, utcfromtimestamp() may fail and mktime() may return non-POSIX timestamp if "right" timezone is used.
To convert datetime.date object that represents da...
Are there any JavaScript static analysis tools? [closed]
...ncreasing the warning level by invoking Closure with an option of --warning_level VERBOSE
PHP CodeSniffer can parse JavaScript as well as PHP and CSS. CodeSniffer ships with several different coding standards, (say phpcs -i to see them) which include many useful sniffs for JavaScript code includin...