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Convert to absolute value in Objective-C
...+ programs too.)
(Alas, there is no habs(short) function. Or scabs(signed char) for that matter...)
Apple's and GNU's Objective-C headers also include an ABS() macro which is type-agnostic. I don't recommend using ABS() however as it is not guaranteed to be side-effect-safe. For instance, ABS(a+...
When should I use ugettext_lazy?
...y executed once (mostly on django's startup); ugettext_lazy translates the strings in a lazy fashion, which means, eg. every time you access the name of an attribute on a model the string will be newly translated-which totally makes sense because you might be looking at this model in different langu...
Https Connection Android
...erifier DO_NOT_VERIFY = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
/**
* Trust every server - dont check for any certificate
*/
private static void trustAllHosts() {
// Create a trust manager that does not validate c...
New features in java 7
.../ code
}
Underscores in numeric literals
int one_million = 1_000_000;
Strings in switch
String s = ...
switch(s) {
case "quux":
processQuux(s);
// fall-through
case "foo":
case "bar":
processFooOrBar(s);
break;
case "baz":
processBaz(s);
// fall-through
def...
Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
... Version,
algorithm AlgorithmIdentifier,
PrivateKey BIT STRING
}
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL
}
So for an RSA private key, the OID is 1.2.840.113549.1.1.1 and there is a RSAPrivat...
How to join components of a path when you are constructing a URL in Python
...
If you want the result to be a string you can add .url at the end: furl.furl('/media/path/').add(path='js/foo.js').url
– Eyal Levin
Oct 31 '17 at 12:15
...
How should I print types like off_t and size_t?
... Visual Studio warns with this also "warning C4477: '_snprintf_s' : format string '%jd' requires an argument of type '__int64', but variadic argument 1 has type 'off_t'"... A truely portable way is printf("%lld\n", (long long)x);
– ericcurtin
Jun 13 '18 at 16:5...
When should I use Inline vs. External Javascript?
...d as <static> and <dynamic>. The static portion is basically a string constant which you shove down the response pipe as fast as you possibly can. This can be a little tricky if you use a lot of middleware that sets cookies (these need to be set before sending http content), but in princ...
Combine two or more columns in a dataframe into a new column with a new name
...t for example is like: A - B instead of A-B. Is it possible to remove this extra space?
– Chetan Arvind Patil
Oct 6 '17 at 2:35
9
...
Best way to work with dates in Android SQLite [closed]
...HH:mm:ss) will then allow sorting by the date column.
Retrieving dates as strings from SQLite you can then format/convert them as required into local regionalised formats using the Calendar or the android.text.format.DateUtils.formatDateTime method.
Here's a regionalised formatter method I use;
p...