大约有 46,000 项符合查询结果（耗时：0.0622秒） [XML]
MySQL get the date n days ago as a timestamp
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it appears (v1) DATE_SUB will return a DATETIME or STRING depending on inputs. TIMESTAMP (v2) is forcing it to a TIMESTAMP type. dev.mysql.com/doc/refman/5.1/en/…
– jsh
Apr 2 '14 at 18:39
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Best way to “negate” an instanceof
...classic form you posted, but somebody might like it...
if (str instanceof String == false) { /* ... */ }
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How to get C# Enum description from value? [duplicate]
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int value = 1;
string description = Enumerations.GetEnumDescription((MyEnum)value);
The default underlying data type for an enum in C# is an int, you can just cast it.
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Regular Expression for alphanumeric and underscores
I would like to have a regular expression that checks if a string contains only upper and lowercase letters, numbers, and underscores.
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How to get the position of a character in Python?
How can I get the position of a character inside a string in python?
9 Answers
9
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How to add two strings as if they were numbers? [duplicate]
I have two strings which contain only numbers:
20 Answers
20
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Interface/enum listing standard mime-type constants
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It's a pity there are no String constants defined in com.google.common.net.MediaType, as MediaType.toString()isn't a compile time constant and therefore not usable in annotations
– Markus Pscheidt
Mar 18 '15 at ...
How to check if a json key exists?
...p://developer.android.com/reference/org/json/JSONObject.html#has(java.lang.String)
Returns true if this object has a mapping for name. The mapping may be NULL.
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ArrayList initialization equivalent to array initialization [duplicate]
...s to point to entirely different objects like Arrays.asList(...).set(0,new String("new string")) This code will work and set the first element of the list to the String object with value "new string". And in fact, it writes through to the native array! Definitely not unmodifiable.
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How to find nth occurrence of character in a string?
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If your project already depends on Apache Commons you can use StringUtils.ordinalIndexOf, otherwise, here's an implementation:
public static int ordinalIndexOf(String str, String substr, int n) {
int pos = str.indexOf(substr);
while (--n > 0 && pos != -1)
pos...