atob is not defined

时间: 2023-08-21 08:06:03 浏览: 64
根据引用中的代码段,这是一个在JavaScript中使用的解决`atob is not defined`错误的方法。这个错误通常发生在浏览器或Node.js环境中,当尝试使用`atob`函数对Base64编码进行解码时,但该函数未定义时会出现。通过在代码中添加适当的兼容性代码,可以解决这个错误。这段代码检查`btoa`和`atob`函数是否已定义,如果未定义,则在全局对象中定义这些函数的替代实现。这样,你就可以在使用`atob`函数进行解码之前,确保该函数存在。 请注意,这段代码是针对特定的问题和环境而编写的,并不适用于所有情况。如果你遇到了`atob is not defined`错误,请检查你的代码中是否缺少了对`atob`函数的定义或是否存在其他问题。
相关问题

MiniProgramError atob is not defined ReferenceError: atob is not defined at Object.success (app-service.js:5543:3195)

很抱歉,atob函数在uniapp中不可用。你可以使用uniapp提供的内置方法来解决这个问题。下面是一个修改后的示例代码: ```javascript // 将base64转换为blob function base64ToBlob(base64Data) { const format = base64Data.split(';base64,')[0].split(':')[1]; // 获取文件格式 const base64 = base64Data.split(',')[1]; // 获取base64编码的数据 const arrayBuffer = uni.base64ToArrayBuffer(base64); // 将base64转换为ArrayBuffer return new Blob([arrayBuffer], { type: format }); } // 在uniapp中使用 const base64Data = 'base64编码的数据'; const blob = base64ToBlob(base64Data); // 使用blob进行操作,比如上传到服务器 ``` 修改后的代码使用了uniapp提供的`uni.base64ToArrayBuffer()`方法将base64数据转换为ArrayBuffer,然后再通过`new Blob()`方法将ArrayBuffer转换为blob对象。这样就可以解决atob函数不可用的问题。请确保你已经将base64编码的数据正确传入`base64Data`变量中,并根据实际情况设置文件类型(`type`)。

js Base64 is not defined

如果在使用 `Base64.decode()` 方法时出现了 `Base64 is not defined` 的错误,可能是因为你没有引入 Base64 相关的库文件或者浏览器不支持该方法。 在 JavaScript 中,除了使用浏览器原生的 `atob()` 和 `btoa()` 方法解码和编码字符串外,还可以使用第三方库来实现 Base64 相关的操作,比如 `js-base64` 库。你可以先引入该库文件,然后再使用 `Base64.decode()` 方法进行解码,具体使用方法如下: ```javascript // 引入 js-base64 库文件 import { Base64 } from 'js-base64'; let base64String = "SGVsbG8gV29ybGQh"; // Base64 编码的字符串 let decodedString = Base64.decode(base64String); // 解码 Base64 编码的字符串 console.log(decodedString); // 输出:Hello World! ``` 需要注意的是,如果你使用的是浏览器原生的 `atob()` 和 `btoa()` 方法,可以直接使用 `atob()` 方法解码 Base64 编码的字符串,而不需要使用 `Base64.decode()` 方法。

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翻译Device configuration register The device has various configuration settings that are global in nature. The configuration settings are as follows: • When the 33978 is in the overvoltage region, a Logic [0] on the VBATP OV bit limits the wetting current on all input channels to 2 mA and the 33978 will not be able to enter into the Low-power mode. A Logic [1] allows the device to operate normally even in the overvoltage region. The OV flag will be set when the device enters in the OV region, regardless the value of the VBATP OV bit. • WAKE_B can be used to enable an external power supply regulator to supply the VDDQ voltage rail. When the WAKE_B VDDQ check bit is a Logic [0], the WAKE_B pin is expected to be pulled-up internally or externally to VDDQ and VDDQ is expected to go low, therefore the 33978 does not wake-up on the falling edge of WAKE_B. A Logic [1], assumes the user is using an external pull-up to VBATP or VDDQ (when VDDQ is not expected to be off) and the IC wakes up on a falling edge of WAKE_B. • INT_B out is used to select how the INT_B pin operates when an interrupt occurs. The IC is able to pulse low [1] or latch low [0]. • Aconfig[1-0] is used to determine the method of selecting the AMUX output, either a SPI command or using a hardwired setup using SG[3-1]. • Inputs SP0-7 may be programmable for switch-to-battery or switch-to-ground. These inputs types are defined using the settings command. To set a SPn input for switch-to-battery, a logic [1] for the appropriate bit must be set. To set a SPn input for switch-toground, a logic [0] for the appropriate bit must be set. The MCU may change or update the programmable switch register via software at any time in Normal mode. Regardless of the setting, when the SPn input switch is closed a logic [1] is placed in the serial output response register.

Q21: Which of the following is a valid user-defined output stream manipulator header? a. ostream& tab( ostream& output ) b. ostream tab( ostream output ) c. istream& tab( istream output ) d. void tab( ostream& output ) Q22: What will be output by the following statement? cout << showpoint << setprecision(4) << 11.0 << endl; a. 11 b. 11.0 c. 11.00 d. 11.000 Q23: Which of the following stream manipulators causes an outputted number’s sign to be left justified, its magnitude to be right justified and the center space to be filled with fill characters? a. left b. right c. internal d. showpos Q24: Which of the following statements restores the default fill character? a. cout.defaultFill(); b. cout.fill(); c. cout.fill( 0 ); d. cout.fill( ' ' ); Q25: When the showbase flag is set: a. The base of a number precedes it in brackets. b. Decimal numbers are not output any differently. c. "oct" or "hex" will be displayed in the output stream. d. Octal numbers can appear in one of two ways. Q26: What will be output by the following statements? double x = .0012345; cout << fixed << x << endl; cout << scientific << x << endl; a. 1.234500e-003 0.001235 b. 1.23450e-003 0.00123450 c. .001235 1.234500e-003 d. 0.00123450 1.23450e-003 Q27: Which of the following outputs does not guarantee that the uppercase flag has been set? a. All hexadecimal numbers appear in the form 0X87. b. All numbers written in scientific notation appear the form 6.45E+010. c. All text outputs appear in the form SAMPLE OUTPUT. d. All hexadecimal numbers appear in the form AF6. Q28: Which of the following is not true about bool values and how they're output with the output stream? a. The old style of representing true/false values used -1 to indicate false and 1 to indicate true. b. A bool value outputs as 0 or 1 by default. c. Stream manipulator boolalpha sets the output stream to display bool values as the strings "true" and "false". d. Both boolalpha and noboolalpha are “sticky” settings.

n: Failed to instantiate [org.springframework.boot.actuate.health.HealthContributorRegistry]: Factory method 'healthContributorRegistry' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dbHealthContributor' defined in class path resource [org/springframework/boot/actuate/autoconfigure/jdbc/DataSourceHealthContributorAutoConfiguration.class]: Unsatisfied dependency expressed through method 'dbHealthContributor' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/alibaba/druid/spring/boot/autoconfigure/DruidDataSourceAutoConfigure.class]: Invocation of init method failed; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class 2023-07-13 16:19:27.253 INFO 14712 --- [ main] o.a.c.c.StandardService : Stopping service [Tomcat] 2023-07-13 16:19:27.291 INFO 14712 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2023-07-13 16:19:27.310 ERROR 14712 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class

img = imread(r'I:\\18Breakageratecalculation\\mask-slic use\\maskSLIC-master\\1\\056.jpg') # The ROI is also stored as an image for viewing convenience # But the roi input input maskSLIC should be a binary image with the same spatial # Dimensions as the image (in this case 300x451) roi = imread(r'I:\\18Breakageratecalculation\\mask-slic use\\maskSLIC-master\\1\\0562.png') # The alpha channel is used to store the ROI in this case and is converted into a logical array of 0s and 1s roi = roi[:, :, 3] > 0 # Alternatively a mask could be created manually with for example a disk: # roi = np.zeros((img.shape[0], img.shape[1])) # a, b = 150, 150 # r = 100 # y,x = np.ogrid[-a:img.shape[0]-a, -b:img.shape[1]-b] # mask = x*x + y*y <= r*r # roi[mask] = 1 # ~~~~~~~~~~~~ Example 1: maskSLIC ~~~~~~~~~~~~~ t1 = time.time() # Note that compactness is defined differently because a grid is not used. Lower compactness for maskSLIC is equivalent segments = seg.slic(img, compactness=10, seed_type='nplace', mask=roi, n_segments=120, recompute_seeds=True, plot_examples=True, enforce_connectivity=True) print("Time: {:.2f} s".format(time.time() - t1)) plt.figure() plt.imshow(mark_boundaries(img, segments)) plt.contour(roi, contours=1, colors='red', linewidths=0.5) plt.axis('off') # ~~~~~~~~~~~ Example 2: SLIC ~~~~~~~~~~~~~~~~~ t1 = time.time() segments = seg.slic(img, compactness=10, seed_type='grid', n_segments=100, plot_examples=False, enforce_connectivity=True) # segments[roi==0] = -1 print("Time: {:.2f} s".format(time.time() - t1)) plt.figure() plt.imshow(mark_boundaries(img, segments)) plt.contour(roi, contours=1, colors='red', linewidths=1) plt.axis('off') plt.show() plt.show()怎么保存结果

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