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Ruby on Rails: Delete multiple hash keys
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While using Hash#except handles your problem, be aware that it introduces potential security issues. A good rule of thumb for handling any data from visitors is to use a whitelist approach. In this case, using Hash#slice instead.
params.slice!(:para...
Making a property deserialize but not serialize with json.net
...pha, Beta, Gamma }
class Bang
{
public string Value { get; set; }
}
And you want to do this:
string json = @"{ ""ObsoleteSetting"" : ""Gamma"" }";
// deserialize
Config config = JsonConvert.DeserializeObject<Config>(json);
// migrate
config.ReplacementSetting =
new Bang { Value ...
Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
I was doing attempting to do some updates to openssl using homebrew and I somehow managed to break everything. I can't do anything now, this is what I get when I try to do bundle install:
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How can I rotate an HTML 90 degrees?
...45 degrees rotation in the demo, so you can see the effect)
Note: The -o- and -moz- prefixes are no longer relevant and probably not required. IE9 requires -ms- and Safari and the Android browser require -webkit-
Update 2018: Vendor prefixes are not needed anymore. Only transform is sufficient. ...
Modular multiplicative inverse function in Python
Does some standard Python module contain a function to compute modular multiplicative inverse of a number, i.e. a number y = invmod(x, p) such that x*y == 1 (mod p) ? Google doesn't seem to give any good hints on this.
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Why do Java programmers like to name a variable “clazz”? [closed]
...t says class. "International" English speakers (those reading both British and American English) are used to transposing 's' and 'z'.
Since Java has had disclosed source and a suitable culture right from the start, worthwhile Java code and tutorials pick up the same conventions. That's one of the g...
Regex - Should hyphens be escaped? [duplicate]
... what the "square brackets" are called) the hyphen has no special meaning, and within a character class, you can place a hyphen as the first or last character in the range (e.g. [-a-z] or [0-9-]), OR escape it (e.g. [a-z\-0-9]) in order to add "hyphen" to your class.
It's more common to find a hyph...
INSERT INTO…SELECT for all MySQL columns
...lt; '2011-01-01 00:00:00';
If the id columns is an auto-increment column and you already have some data in both tables then in some cases you may want to omit the id from the column list and generate new ids instead to avoid insert an id that already exists in the original table. If your target ta...
BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...广播方式的报文有4种，分别为可连接的非定向广播（ADV_IND）、可连接的定向广播（ADV_DIRECT_IND）、可扫描非定向广播（ADV_SCAN_IND）、不可连接的非定向广播（ADV_NONCONN_IND）
4种广播的使用场景各不相同
可连接的非定向广播（A...
Thread-safe List property
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Like List<T> and unlike Dictionary, ConcurrentBag accepts duplicates.
– The Light
May 24 '12 at 9:17
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