大约有 6,887 项符合查询结果（耗时：0.0254秒） [XML]
Case-Insensitive List Search
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Instead of String.IndexOf, use String.Equals to ensure you don't have partial matches. Also don't use FindAll as that goes through every element, use FindIndex (it stops on the first one it hits).
if(testList.FindIndex(x => x.Equals(keywor...
Check if a given key already exists in a dictionary and increment it
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To answer the question "how can I find out if a given index in that dict has already been set to a non-None value", I would prefer this:
try:
nonNone = my_dict[key] is not None
except KeyError:
nonNone = False
This conforms to the already invoked concept of EAFP (easier t...
default select option as blank
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</select>
JS
document.getElementById("myDropdown").selectedIndex = -1;
or JQuery
$("#myDropdown").prop("selectedIndex", -1);
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Run a Python script from another Python script, passing in arguments [duplicate]
... work for me if the main program has optional parameters. Here I get "list index out of range". Better have a Main(sys.argv) and handle the list of arguments in Main
– 576i
Nov 11 '14 at 8:48
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How do I create a multiline Python string with inline variables?
...ct)
print(multiline_string)
Also a list can be passed to format(), the index number of each value will be used as variables in this case.
list = ['go',
'now',
'great']
multiline_string = '''I'm will {0} there
I will go {1}
{2}'''.format(*list)
print(multiline_string)
Both s...
What is the documents directory (NSDocumentDirectory)?
...ForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0]
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Rename a git submodule
...t add newpath
git submodule sync
Note: this approach does not update the index and .gitmodules properly in 2018 versions of GIT.
Note: You may be able to now just do git mv oldpath newpath now, as pointed out in VonC's answer. (Ensure you are using the latest version of git)
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Validation failed for one or more entities while saving changes to SQL Server Database using Entity
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storeDB.SaveChanges();
return RedirectToAction("Index");
}
}
catch (System.Data.Entity.Validation.DbEntityValidationException dbEx)
{
Exception raise = dbEx;
foreach (var validationErrors in dbEx.EntityValidationErrors)
{
foreach (var validatio...
How do I tell if a regular file does not exist in Bash?
...rue if a string is not empty. ~ ibm.com/developerworks/library/l-bash-test/index.html
– BlueCacti
May 5 '14 at 11:06
1
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Convert a JSON string to object in Java ME?
...rm is an object having get() and opt() methods for accessing the values by index, and put() methods for adding or replacing values. The values can be any of these types: Boolean, JSONArray, JSONObject, Number, and String, or the JSONObject.NULL object.
JSONStringer.java
A JSONStringer is a tool for ...