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Ruby function to remove all white spaces?
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54
\s+ means 1 or more whitespace characters (space, newline, tab). The // surrounding show that it's a regular expression.
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Replacing instances of a character in a string
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answered Oct 4 '12 at 9:01
Martijn Pieters♦Martijn Pieters
839k212212 gold badges32203220 silver badges28102810 bronze badges
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How to check if an element is in an array
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Swift 2, 3, 4, 5:
let elements = [1, 2, 3, 4, 5]
if elements.contains(5) {
print("yes")
}
contains() is a protocol extension method of SequenceType (for sequences of Equatable elements) and not a global method as in
earlier releas...
Codesign error: Certificate identity appearing twice
CodeSign error: Certificate identity 'iPhone Developer: XXXX (12345678)' appears more than once in the keychain. The codesign tool requires there only be one.
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dropping infinite values from dataframes in pandas?
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445
The simplest way would be to first replace infs to NaN:
df.replace([np.inf, -np.inf], np.nan)...
Make the current Git branch a master branch
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14 Answers
14
Active
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Easiest way to check for an index or a key in an array?
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answered Nov 4 '12 at 18:25
doubleDowndoubleDown
6,70711 gold badge2727 silver badges4444 bronze badges
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A Regex that will never be matched by anything
...nd only then not find the "a" and return a negative match. I see it take ~480ms to scan a ~275k line file. The converse "a^" takes about the same time, even if it might seem more efficient. On the other hand, a negative lookahead need not scan anything: "(?!x)x" (anything not followed by an x als...
How to construct a timedelta object from a simple string
...as a string. The user must enter something like "32m" or "2h32m", or even "4:13" or "5hr34m56s"... Is there a library or something that has this sort of thing already implemented?
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二进制数据专题：蓝牙、Socket、WebSocket、MQTT 收发字节 · App Inventor 2 中文网
...电器板：一个字节控制 8 路开关
Web 接口：用 Base64 传二进制
从零跑通：TCP 温湿度与开关控制
准备对端与界面
完整积木：连接、收发、拆帧与超时
闭环验收
离线验证...