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MySQL WHERE: how to write “!=” or “not equals”?
...he standard <> operator.
Perhaps your fields are not actually empty strings, but instead NULL?
To compare to NULL you can use IS NULL or IS NOT NULL or the null safe equals operator <=>.
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How to escape apostrophe (') in MySql?
...a little bit more than you mention. It also says,
A “'” inside a string quoted with “'” may be written as “''”.
(Also, you linked to the MySQL 5.0 version of Table 8.1. Special Character Escape Sequences, and the current version is 5.6 — but the current Table 8.1. Special Char...
How to declare an ArrayList with values? [duplicate]
...ate a new object using the constructor that accepts a Collection:
List<String> x = new ArrayList<>(Arrays.asList("xyz", "abc"));
Tip: The docs contains very useful information that usually contains the answer you're looking for. For example, here are the constructors of the ArrayLis...
How do I print the type of a variable in Rust?
... This is intended for diagnostic use. The exact contents and format of the string are not specified, other than being a best-effort description of the type.
If you want your type representation to stay the same between compiler versions, you should use a trait, like in the phicr's answer.
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How can I perform a str_replace in JavaScript, replacing text in JavaScript?
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Using regex for string replacement is significantly slower than using a string replace.
As demonstrated on JSPerf, you can have different levels of efficiency for creating a regex, but all of them are significantly slower than a simple strin...
How do I get the first n characters of a string without checking the size or going out of bounds?
How do I get up to the first n characters of a string in Java without doing a size check first (inline is acceptable) or risking an IndexOutOfBoundsException ?
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Loop through files in a folder using VBA?
...unction LoopThroughFiles(inputDirectoryToScanForFile, filenameCriteria) As String
Dim StrFile As String
'Debug.Print "in LoopThroughFiles. inputDirectoryToScanForFile: ", inputDirectoryToScanForFile
StrFile = Dir(inputDirectoryToScanForFile & "\*" & filenameCriteria)
Do Whi...
How to download a file from a URL in C#?
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Use System.Net.WebClient.DownloadFile:
string remoteUri = "http://www.contoso.com/library/homepage/images/";
string fileName = "ms-banner.gif", myStringWebResource = null;
// Create a new WebClient instance.
using (WebClient myWebClient = new WebClient())
{
m...
Split string with multiple delimiters in Python [duplicate]
... this uses some RegEx like things as mentioned above. So trying to split a string with . will split every single character. You need to escape it. \.
– marsh
Nov 14 '16 at 15:38
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Why do I get TypeError: can't multiply sequence by non-int of type 'float'?
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raw_input returns a string (a sequence of characters). In Python, multiplying a string and a float makes no defined meaning (while multiplying a string and an integer has a meaning: "AB" * 3 is "ABABAB"; how much is "L" * 3.14 ? Please do not re...